Release 2.12.8.2

The following are the changes in this release:

    Calc can now correctly compile without CUSTOM being defined,
    thanks to a report by <GitHub user barsnick>.

.gitignore

@@ -65,6 +65,7 @@ help/bugs
 help/builtin
 help/change
 help/changes
+help/contrib
 help/copy
 help/cscript
 help/custom_cal
@@ -76,6 +77,8 @@ help/funclist.c
 help/libcalc
 help/man
 help/new_custom
+help/question
+help/questions
 help/resource
 help/type
 help/usage

BUGS

@@ -1,12 +1,12 @@
 If you notice something wrong, strange or broken, try rereading:
 
-   README.FIRST
+    README.FIRST
-   HOWTO.INSTALL
+    HOWTO.INSTALL
-   BUGS (this file)
+    BUGS (this file)
 
 If that does not help, cd to the calc source directory and try:
 
-   make check
+    make check
 
 Look at the end of the output, it should say something like:
 
@@ -15,74 +15,163 @@ Look at the end of the output, it should say something like:
 
 If it does not, then something is really broken!
 
+To be sure that your version of calc is up to date, check out:
+
+    http://www.isthe.com/chongo/tech/comp/calc/calc-mirror.html
+
 If you made and modifications to calc beyond the simple Makefile
 configuration, try backing them out and see if things get better.
 
-To be sure that your version of calc is up to date, check out:
+If you have tried all of the above and things still are not right,
-
+then it may be time to send in a bug report.
-	http://www.isthe.com/chongo/tech/comp/calc/calc-download.html
-
-The calc web site is located at:
-
-	http://www.isthe.com/chongo/tech/comp/calc/index.html
 
 =-=
 
-If you have tried all of the above and things still are not right,
+The BEST WAY TO SEND IN A BUG REPORT is via calc GitHub issue URL:
-then it may be time to send in a bug report.  You can send bug
-and bug fixes reports to:
 
-	calc-bug-report at asthe dot com
+    https://github.com/lcn2/calc/issues
 
-	NOTE: Remove spaces and replace 'at' with @, 'dot' with .
+If you see an existing issue that matches your problem, look
+over the notes and if needed, add your own observation,
+even if you just add to an existing issue:
 
-    This replaces the old calc-bugs at asthe dot com address.
+    I have this issue too
 
-    To be sure we see your EMail reporting a calc bug, please use the
+If you don't see your issue addressed, then on the above
-    following phase in your EMail Subject line:
+GitHub web page, click on this button:
 
-	calc bug report
+    ((New Issue))
 
-    That phrase in your subject line will help ensure your request
+=-=
-    will get past our anti-spam filters.  You may have additional
-    words in your subject line.
 
-    However, you may find it more helpful to simply subscribe
+If you prefer to not use GitHub, then you
-    to the calc-tester mailing list (see below) and then to
+may send bug and bug fixes reports to:
-    send your report to that mailing list as a wider set calc
-    testers may be able to help you.
 
-When you send your report, please include the following information:
+    calc-bugrept-mail at asthe dot com
 
-    * a description of the problem
+    NOTE: Remove spaces and replace 'at' with @, 'dot' with .
-    * the version of calc you are using (if you cannot get calc
-      to run, then send us the 4 #define lines from version.c)
-    * if you modified calc from an official patch, send me the mods you made
-    * the type of system you were using
-    * the type of compiler you were using
-    * any compiler warnings or errors that you saw
-    * cd to the calc source directory, and type:
 
-	make debug > debug.out 2>&1		(sh, ksh, bash users)
+    NOTE: This replaces the old calc-bugs at asthe dot com address.
-	make debug >& debug.out			(csh, tcsh users)
 
-      and send the contents of the 'debug.out' file.
+PLEASE put following the SPECIAL PHRASE somewhere in your Email Subject line:
 
-Stack traces from core dumps are useful to send as well.
+    calc bug report
 
-Fell free to use the above address to send in big fixes (in the form
+You may add additional words to your subject line.
+
+Suggestion:
+
+    From time to time, the Email address and Subject SPECIAL PHRASE
+    may change so verify you have the current info by visiting:
+
+	http://www.isthe.com/chongo/tech/comp/calc/calc-bugrept.html
+
+IMPORTANT:
+
+    PLEASE use the above SPECIAL PHRASE somewhere in the Subject line or
+    the mail system won't deliver your Email message.
+
+Keep in mind that the best way to report on a calc bug is
+via the above mentioned calc GitHub issue URL.
+
+Please be patient as we cannot always respond to Email messages quickly.
+
+=-=
+
+When you send your report, via the calc GitHub issue URL or Email,
+please include the following information:
+
+    * A description of the problem
+
+    * Version of calc you are using
+
+	If you cannot compile calc, then look at version.c
+	and report the #define that start with:
+
+	    #define MAJOR_VER
+	    #define MINOR_VER
+	    #define MAJOR_PATCH
+	    #define MINOR_PATCH
+
+    * If you modified calc from an official patch,
+      send us the mods you made
+
+    * Type and version of the operating system
+
+    * Type and version of compiler
+
+    * Send us all compiler warnings or errors you find
+
+    * If calc dumped core, try to send us a core dump stack trace
+
+    * cd to the calc source directory, and send the contents
+      of debug.out produced by this command:
+
+	make debug > debug.out 2>&1
+
+Fell free to use the above address to send in bug fixes (in the form
 of a context diff patch).
 
 =-=
 
-Known bugs:
+Known bugs in calc:
+
+    Under macOS, the installation of the calc man page fails.
 
     The output of the alg_config.cal resource file is bogus.
     We would welcome a replacement for this code.
 
+    Calc shell scripts do not read from stdin properly,
+    we all as a number of the cscript examples.
+
+    The argv() function is behaving differently
+    when run in calc shell script mode:
+
+	When calc is run as:
+
+	    calc -s a bb ccc
+
+        and given this input on the command prompt:
+
+	    print "config(\"program\")=", config("program");
+	    print "argv()=", argv();
+	    argc = argv();
+	    for (i=0; i < argc; ++i) {
+		print "argv(":i:")=", argv(i);
+	    }
+
+	calc prints:
+
+	    config("program")= calc
+	    argv()= 3
+	    argv(0)= a
+	    argv(1)= bb
+	    argv(2)= ccc
+
+	but when it is run as a script called ./simple:
+
+	    #!/usr/local/bin/calc -q -s -f
+	    print "config(\"program\")=", config("program");
+	    print "argv()=", argv();
+	    argc = argv();
+	    for (i=0; i < argc; ++i) {
+		print "argv(":i:")=", argv(i);
+	    }
+
+	under Linux prints:
+
+	    config("program")= /usr/bin/calc
+	    argv()= 4
+	    argv(0)= ./simple
+	    argv(1)= a
+	    argv(2)= bb
+	    argv(3)= ccc
+
+	and under macOS simply enters into interactive mode.
+
     We are sure some more bugs exist.  When you find them, please let
     us know!  See the above for details on how to report and were to
-    EMail your bug reports and hopefully patches to fix them.
+    Email your bug reports and hopefully patches to fix them.
 
 =-=
 
@@ -135,32 +224,7 @@ mis-features in calc:
 
 =-=
 
-To subscribe to the calc-tester mailing list, visit the following URL:
+## Copyright (C) 1999-2014,2021  Landon Curt Noll
-
-	http://www.isthe.com/chongo/tech/comp/calc/calc-tester.html
-
-    This is a low volume moderated mailing list.
-
-    This mailing list replaces calc-tester at asthe dot com list.
-
-    If you need a human to help you with your mailing list subscription,
-    please send EMail to our special:
-
-	calc-tester-maillist-help at asthe dot com
-
-	NOTE: Remove spaces and replace 'at' with @, 'dot' with .
-
-    address.  To be sure we see your EMail asking for help with your
-    mailing list subscription, please use the following phase in your
-    EMail Subject line:
-
-	calc tester mailing list help
-
-    That phrase in your subject line will help ensure your
-    request will get past our anti-spam filters.  You may have
-    additional words in your subject line.
-
-## Copyright (C) 1999-2014  Landon Curt Noll
 ##
 ## Calc is open software; you can redistribute it and/or modify it under
 ## the terms of the version 2.1 of the GNU Lesser General Public License

CHANGES

@@ -1,7 +1,274 @@
-The following are the changes from calc version 2.12.6.5 to date:
+The following are the changes from calc version 2.12.8.1 to date:
+
+    Fixed how the *.tar.bz2 are formed.  The calc-2.12.8.0.tar.bz2 file
+    that was formed for calc version 2.12.8.0 was missing most files.
+
+    Expanded 'make chk' to also verify that 'make distchk' and 'make
+    distlist' execute successfully.  This will help check a regression
+    of the bug that produced the bogus calc-2.12.8.0.tar.bz2 file.
+
+    Added additional regression tests related 0^(zero_expression)==1.
+
+    Calc can now correctly compile without CUSTOM being defined,
+    thanks to a report by <GitHub user barsnick>.
+
+
+The following are the changes from calc version 2.12.7.5 to 2.12.8.0:
+
+    Fixed a mistake in "help intro" where some inserted text changed
+    the value of "." and thus made the next result incorrect.
+
+    Clarified in "help factor" that 1 is returned if no
+    factor below the limit was found.
+
+    Removed Makefile variable ${MAKEFILE_REV}.
+
+    The missing cscript/square.calc file has been restored.
+
+    Fixed compiler errors and warnings related to GCC.  In particular,
+    gcc/9.3.1 and gcc/10.2.1 now compile calc without any compiler
+    errors or warnings, even with -Werror -Wextra -pedantic.
+
+    To print out information about the calc compilation
+    environment, we added the following make rule:
+
+	make calcinfo
+
+    Improved how 'make debug' operates.
+
+    Moved help/contrib to CONTRIB-CODE.  The help/contrib file
+    is now build from a copy of CONTRIB-CODE.
+
+    Created a new calc bug report Email address.  Created a new
+    calc question Email address.  Created a new calc contribution
+    Email address.  See the BUGS file for details.
+
+    Added "help questions" to print the QUESTIONS help file.
+
+    If the environment variable $CALCHELP is defined and is non-empty,
+    then calc help files will be in the directory by the $CALCHISTFILE
+    environment variable.
+
+    If the environment variable $CALCCUSTOMHELP is defined and is
+    non-empty, then custom calc help files will be in the directory
+    by the $CALCCUSTOMHELP environment variable.
+
+    Fixed a number of typos in text and in source code comments.
+
+    The calc-tester mailing list has been retired.  See:
+
+	* How to submit a calc bug report:
+
+	    http://www.isthe.com/chongo/tech/comp/calc/calc-bugrept.html
+
+	* How to contribute code to calc:
+
+	    http://www.isthe.com/chongo/tech/comp/calc/calc-contrib.html
+
+	* How to submit a question about calc:
+
+	    http://www.isthe.com/chongo/tech/comp/calc/calc-question.html
+
+
+The following are the changes from calc version 2.12.7.1 to 2.12.7.5:
+
+    Corrected CHANGES notes that were mixed up for TAB, VT, CR &
+    NL.  The code in 2.12.7.0 is correct.  The CHANGE notes should
+    have read:
+
+	The following is a partial list of escape sequences recognized
+	in strings and in printf formats:
+
+	    \a	audible bell	byte 0x07 in ASCII encoding
+	    \b	backspace	byte 0x08 in ASCII encoding
+	    \f	form feed	byte 0x0c in ASCII encoding
+	    \n	newline		byte 0x0a in ASCII encoding
+	    \r	return		byte 0x0d in ASCII encoding
+	    \t	tab		byte 0x09 in ASCII encoding
+	    \v	vertical tab	byte 0x0b in ASCII encoding
+
+    Fixed a segfault when getpwuid() returned NULL during initialization.
+    Thanks goes to baratharon GitHub user for reporting this issue.
+
+    Requiring calc shell scripts to use -s -f at the end of the
+    initial #! line.
+
+    Fixed /tmp/mersenne example in calc(1) man page.
+
+    Added make variable ${ARCH_CFLAGS}.  The ${ARCH_CFLAGS} is
+    added after ${CCMISC} and before ${EXTRA_CFLAGS} when building
+    the ${CFLAGS} for compiling C code.  are ${CC} when compiling
+    C files.  The default value is:
+
+	ARCH_CFLAGS= -march=native
+
+    which directs C compiler to compile for the native machine.
+    To disable use of '-march=native', set ARCH_CFLAGS to the empty
+    string as in:
+
+	make all ARCH_CFLAGS=
+
+    To make calc RPMs more portable, they are compiled with an
+    empty ARCH_CFLAGS.
+
+    Fixed issues relating to compiling on macOS.  Fixed issues
+    where <unistd.h> is needed.
+
+    Fixed typos in help/intro and README.md. <<GitHub guilhermgonzaga>>
+
+    Copied missing description lines from help/intro to README.md
+    "What is calc?" section.  <<GitHub guilhermgonzaga>>
+
+    GCC 7 added a warning on fall through in case statements.  It's
+    enabled by -Wextra and treated as an error due to -Wall so it
+    breaks compilation.  See -Wimplicit-fallthrough in the GCC
+    manual.  The default value is 3, which means a comment matching
+    some specific regexes is enough to disable the warning.
+    Fixed spaces vs tabs and use FALLTHRU as it's used elsewhere.
+    Fixed one FALLTHRU comment that was inconsistent with others.
+    <<GitHub jcul>>
+
+    Fixed minor typo on help/power. <<GitHub thegithubr>>
+
+    By default, the calc history file is located in ~/.calc_history.
+    Now, if the environment variable $CALCHISTFILE is defined
+    and is non-empty, then calc history file will be defined
+    by the $CALCHISTFILE environment variable.
+
+    Calc as defined 0^0 as 1.  However in the past, 0 raised to
+    an expression that evaluated to zero returned 1.  The result
+    was that 0^0 was different than 0^(6-6) or even 0^(0).
+    Now, calc will return 1 for 0^(0) and 0^zero when zero == 0.
+
+    The missing cscript/square.calc file has been restored.
+
+
+The following are the changes from calc version 2.12.6.10: to 2.12.7.0:
+
+    Added a patch to replaces the manual search for include files
+    in $(INCDIR) in the have_*.h targets with compiler invocations.
+    Thanks goes to Helmut Grohne (helmut at subdivi dot de) who
+    implemented the patch and posted it to the Debian bug tracker
+    and Martin Buck (m at rtin-buck dor de) for forwarding it to us.
+
+    The check_include make rule was fixed to not assume /usr/include.
+
+    The qprintnum() function now takes outdigits as a 3rd argument.
+    Most of the time, this 3rd argument is just conf->outdigits.
+    But when it comes to the experimental '%g', this value can
+    change.  This avoids having to modify conf->outdigits.
+
+    Fixed a problem where gcc complains about E_FUNC not being defined
+    for Linux systems as reported by Martin Buck (m at rtin-buck dor de).
+
+    Updated the help files help/config, help/display, help/epsilon,
+    help/fprint, help/printf, and help/strprintf to give more
+    examples of how display digits and epsilon precision interact
+    with displaying values.
+
+    Added more information about %g in the help file help/printf.
+
+    The '\a' is now recognized in a printf format string as the
+    single byte audible bell character (byte 0x07 in ASCII encoding).
+
+    The following is a partial list of escape sequences recognized
+    in strings and in printf formats:
+
+	\a	audible bell	byte 0x07 in ASCII encoding
+	\b	backspace	byte 0x08 in ASCII encoding
+	\f	form feed	byte 0x0c in ASCII encoding
+	\n	newline		byte 0x0a in ASCII encoding
+	\r	return		byte 0x0d in ASCII encoding
+	\t	tab		byte 0x09 in ASCII encoding
+	\v	vertical tab	byte 0x0b in ASCII encoding
+
+
+The following are the changes from calc version 2.12.6.9 to 2.12.6.9:
+
+    Fixed a number of core dump bugs related to the calculation of
+    tan(), cot(), sec(), csc(), tanh(), coth(), sech(), and csch(),
+    asin(), acos(), asinh(), acosh(), where when a call to an
+    underlying function produced an invalid value.  Thanks goes to
+    github user wuxiuheng for reporting this problem.
+
+    A number of trigonometric and hyperbolic functions that incorrectly
+    returned E_LOGINF, now return a new error code that is more
+    specific to the trigonometric or hyperbolic function.  The
+    following is a list of these new error codes: E_TAN3 E_TAN4
+    E_COT3 E_COT4 E_SEC3 E_CSC3 E_TANH3 E_TANH4 E_COTH3 E_COTH4
+    E_SECH3 E_CSCH3 E_ASIN3 E_ACOS3 E_ASINH3 E_ACOSH3 E_ATAN3 E_ACOT3
+    E_ASEC3 E_ACSC3 E_ATANH3 E_ACOTH3 E_ASECH3 E_ACSCH3.
+
+    Added regression tests 3729 thru 3732 to test E_TAN3, E_COT3,
+    E_SEC3 and E_CSC3 respectively.
+
+    Added experimental %g printf (and strprintf) format implementation
+    based on pull request from github user 10110111.
+
+    Made experimental changes to macOS builds to not require use of
+    /usr/include.  The INCDIR for macOS uses:
+
+	INCDIR= $(shell xcrun --show-sdk-path --sdk macosx)/usr/include
+
+    to determine the upper path of the /usr/include directory for macOS.
+    In some rare cases, the Darwin target seems to not automatically detected.
+    If you are running under macOS, and that happens, you can force
+    the target to be Darwin:
+
+	# for macOS users only, force the target to be darwin
+	#
+	make target=Darwin clobber
+	make target=Darwin all
+	make target=Darwin chk
+	make target=Darwin install
+
+
+The following are the changes from calc version 2.12.6.6 to 2.12.6.8:
+
+    For historical purposes, in lucas.cal, gen_v1(1, n) always returns 4.
+
+    Fixed some compiler warnings, thanks to a report by Mike
+    <michael dot d dot ince at gmail dot com>.
+
+    Added work around for a gcc warning bug, thanks to a report by Mike
+    <michael dot d dot ince at gmail dot com>.
+
+    Fixed errors in various help files such as:
+
+	mat randbit seed srandom types
+
+    Removed the MAXSTRING symbol because it was no longer used by calc.
+
+    Increased HIST_SIZE (depth of the history stack) from 10k to 32k.
+
+    Increased TTYSIZE (reallocation size for terminal buffers) from 100 to 8191.
+
+    Increased MAXDEPTH (maximum depth of input stack) from 10 to 255.
+
+    Increased interactive input buffer size from 1024 to 256k.  This has the
+    effect of increasing the maximum length of an input line from a tty.
+    This helps with an interactive bug that was reported by Ruslan Kabatsayev
+    (b7 dot 10110111 at gmail dot com).
+
+    The calc man page indicates that -d also disables the printing of the
+    leading tilde.
+
+    Added information to "help command" about how to silence messages
+    while reading calc resource files.
+
+    Fixed an error message buffer overflow thanks to a report by
+    Frank Peters <nlp at northernlightsphoto dot biz>.
+
+    Replaced all use of the C function sprintf() with snprintf().
+    Replaced all use of the C funcion vsprintf() with vsnprintf().
+    Replaced all DONT_HAVE_VSPRINTF with DONT_HAVE_VSNPRINTF.
+    Replaced all Makefile var ${HAVE_VSPRINTF} with ${HAVE_VSNPRINTF}.
+
+
+The following are the changes from calc version 2.12.6.4 to 2.12.6.5:
 
     Fixed warning about undefined operations involving the qlink(q)
-    macro by deplacing that macro with an inline-function.  Thanks goes
+    macro by replacing that macro with an inline-function.  Thanks goes
     to David Haller <dnh at opensuse dot org> for this fix.
 
     NOTE for Windows 10 users: Pavel Nemec <pane at seznam dot cz>
@@ -128,7 +395,7 @@ The following are the changes from calc version 2.12.5.4 to 2.12.5.6:
     The improved gen_v1() function is capable of returning a value
     for all valid values of h and n.  As a result, the trial tables
     used by gen_v1() have been changed to a short list of values
-    to try, in order ot likelyhood of success, before doing an
+    to try, in order ot likelihood of success, before doing an
     exhaustive search for a v1 value to return.
 
     Removed lucas_tbl.cal calc resource file.  This file was made
@@ -218,32 +485,6 @@ The following are the changes from calc version 2.12.5.1 to 2.12.5.2:
 
 The following are the changes from calc version 2.12.5.0 to 2.12.5.1:
 
-    Calc has a new calc-tester mailing list.  This list is for those
-    who are using/testing calc.  We also use this list to announce
-    new versions of calc.  To subscribe to the calc-tester mailing
-    list, visit the following URL:
-
-	    http://www.isthe.com/chongo/tech/comp/calc/calc-tester.html
-
-	This is a low volume moderated mailing list.
-
-	This mailing list replaces calc-tester at asthe dot com list.
-
-	If you need a human to help you with your mailing list subscription,
-	please send Email to our special:
-
-	    calc-tester-maillist-help at asthe dot com
-
-	address.  To be sure we see your Email asking for help with your
-	mailing list subscription, please use the following phase in your
-	Email Subject line:
-
-	    calc tester mailing list help
-
-	That phrase in your subject line will help ensure your
-	request will get past our anti-spam filters.  You may have
-	additional words in your subject line.
-
     There is a new calc bug report Email address:
 
 	    calc-bug-report at asthe dot com
@@ -458,7 +699,7 @@ The following are the changes from calc version 2.12.4.6 to version 2.12.4.10:
     Silenced annoying warning about unused variable 'intp'
     while compiling endian.c under some circumstances.
 
-    Fixed typo in redeclaration warnings.  Thanks to
+    Fixed typo in re-declaration warnings.  Thanks to
     Christoph Zurnieden <czurnieden at gmx dot de> for this report.
 
     Added a number of calc resource files by
@@ -2568,7 +2809,6 @@ The following are the changes from calc version 2.11.2t0 to 2.11.2t1.0:
     Using calc-bugs at asthe dot com for calc bug reports,
     calc-contrib at asthe dot com for calc contributions,
     calc-tester-request at asthe dot com for requests to join calc-tester and
-    calc-tester at asthe dot com for the calc tester mailing list.
 
     Replaced explicit Email addresses found this file with the <user at
     site dot domain> notation to reduce the potential for those folks
@@ -7308,7 +7548,7 @@ Following is a list of visible changes to calc from version 1.24.7 to 1.26.1:
 
     A small bug in the library file regress.cal was fixed.
 
-## Copyright (C) 2001-2017  Landon Curt Noll
+## Copyright (C) 2001-2017,2021  Landon Curt Noll
 ##
 ## Calc is open software; you can redistribute it and/or modify it under
 ## the terms of the version 2.1 of the GNU Lesser General Public License

CONTRIB-CODE

@@ -0,0 +1,100 @@
+Calc is open source. Contributions of code are welcome.
+
+We welcome and encourage you to send us:
+
+    * calc resource files (cal/*.cal files)
+    * calc shell scripts (cscript/*.calc files)
+    * builtin functions that you have modified or written, i.e.:
+	assocfunc.c comfunc.c func.c func.h
+	listfunc.c matfunc.c qfunc.c zfunc.c
+    * custom functions that you have modified or written
+    * help files modified or written (help/*)
+    * Makefile improvements (Makefile, */Makefile)
+    * other source code modifications (*.c, *.h)
+    * etc. (* */* :) )
+
+In order to consider integrating your code, we need:
+
+    * calc version you are working with (please try use the latest version)
+    * new help files or help file patches, if applicable (documentation)
+    * proposed text for the CHANGES file (brief description of what it does)
+    * regress.cal test patch as needed
+    * your source code and/or source code changes (:-))
+
+If you add functionality to calc, please be sure to modify/patch/add
+Makefiles, help files, cal/regress.cal test code as well.
+Regression test cases are vital to maintaining calc's level
+of correctness and helps us avoid code bug regression.
+
+Please try to generate a patch against the most recent
+version of calc, and if you use GitHub, the top of the
+master branch:
+
+    https://github.com/lcn2/calc
+
+The best way contribute to calc bug is to generate calc
+GitHub pull request:
+
+    https://github.com/lcn2/calc/pulls
+
+Your code needs to be contributed under either the 2.1 of the GNU
+Lesser General Public License (LGPL 2.1) or in the public domain.
+
+If you do not want to use calc GitHub, then send Email to:
+
+    calc-contrib-mail at asthe dot com
+
+    NOTE: Remove spaces and replace 'at' with @, 'dot' with .
+
+You MUST use following SPECIAL PHRASE in your Email Subject line:
+
+    calc contribution
+
+You may add additional words to your subject line.
+
+Suggestion:
+
+    From time to time, the Email address and Subject SPECIAL PHRASE
+    may change so verify you have the current info by visiting:
+
+	http://www.isthe.com/chongo/tech/comp/calc/calc-contrib.html
+
+IMPORTANT: If your Email doesn't contain the above phrase,
+	   then we WILL NOT SEE your Email.
+
+PLEASE BE SURE you have that SPECIAL PHRASE somewhere in the subject line!
+
+Keep in mind that the best way to report on a calc bug is to use
+the above mentioned calc GitHub procedure.
+
+Please be patient as we cannot always respond to Email messages quickly.
+
+=-=
+
+See also the calc wishlist by running the calc command:
+
+    ; help wishlist
+
+=-=
+
+## Copyright (C) 1999,2014,2021  Landon Curt Noll
+##
+## Calc is open software; you can redistribute it and/or modify it under
+## the terms of the version 2.1 of the GNU Lesser General Public License
+## as published by the Free Software Foundation.
+##
+## Calc is distributed in the hope that it will be useful, but WITHOUT
+## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+## or FITNESS FOR A PARTICULAR PURPOSE.	 See the GNU Lesser General
+## Public License for more details.
+##
+## A copy of version 2.1 of the GNU Lesser General Public License is
+## distributed with calc under the filename COPYING-LGPL.  You should have
+## received a copy with calc; if not, write to Free Software Foundation, Inc.
+## 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+##
+## Under source code control:	1997/03/09 16:33:22
+## File existed as early as:	1997
+##
+## chongo <was here> /\oo/\	http://www.isthe.com/chongo/
+## Share and enjoy!  :-)	http://www.isthe.com/chongo/tech/comp/calc/

COPYING

@@ -6,7 +6,7 @@ This file is Copyrighted
 
     This file is covered under the following Copyright:
 
-	Copyright (C) 1999-2014  Landon Curt Noll
+	Copyright (C) 1999-2021  Landon Curt Noll
 	All rights reserved.
 
 	Everyone is permitted to copy and distribute verbatim copies
@@ -49,65 +49,6 @@ Calc is covered by the GNU Lesser General Public License
 	    Boston, MA  02110-1301
 	    USA
 
-    To subscribe to the calc-tester mailing list, visit the following URL:
-
-	    http://www.isthe.com/chongo/tech/comp/calc/calc-tester.html
-
-	This is a low volume moderated mailing list.
-
-	This mailing list replaces calc-tester at asthe dot com list.
-
-	If you need a human to help you with your mailing list subscription,
-	please send EMail to our special:
-
-	    calc-tester-maillist-help at asthe dot com
-
-	    NOTE: Remove spaces and replace 'at' with @, 'dot' with .
-
-	address.  To be sure we see your EMail asking for help with your
-	mailing list subscription, please use the following phase in your
-	EMail Subject line:
-
-	    calc tester mailing list help
-
-	That phrase in your subject line will help ensure your
-	request will get past our anti-spam filters.  You may have
-	additional words in your subject line.
-
--=-
-
-    Calc bug reports and calc bug fixes should be sent to:
-
-	    calc-bug-report at asthe dot com
-
-	    NOTE: Remove spaces and replace 'at' with @, 'dot' with .
-
-	This replaces the old calc-bugs at asthe dot com address.
-
-	To be sure we see your EMail reporting a calc bug, please use the
-	following phase in your EMail Subject line:
-
-	    calc bug report
-
-	That phrase in your subject line will help ensure your
-	request will get past our anti-spam filters.  You may have
-	additional words in your subject line.
-
-	However, you may find it more helpful to simply subscribe
-	to the calc-tester mailing list (see above) and then to
-	send your report to that mailing list as a wider set calc
-	testers may be able to help you.
-
--=-
-
-    The calc web site is located at:
-
-	http://www.isthe.com/chongo/tech/comp/calc/
-
-    NOTE: The EMail address uses 'asthe', while the web site uses 'isthe'.
-
--=-
-
 Calc's relationship to the GNU Lesser General Public License
 ------------------------------------------------------------
 

HOWTO.INSTALL

@@ -29,9 +29,19 @@ Installing calc from the bzip2-ed tarball in 4 easy steps:
 
 	The top level Makefile and the custom/Makefile require a GNU
 	Make (such as gmake) or an equivalently advanced make.	On many
-	targets, the default make is sufficent.  On FreeBSD for example,
+	targets, the default make is sufficient.  On FreeBSD for example,
 	one must use gmake instead of make.
 
+	Some report that under macOS, one has to declare the target
+	to be darwin.  So for macOS, one might have to do:
+
+	    # for macOS users only, force the target to be darwin
+	    #
+	    make target=Darwin clobber
+	    make target=Darwin all
+	    make target=Darwin chk
+	    make target=Darwin install
+
 	If your target system does not have GNU Make (or equivalent), then
 	you should try using the Makefile.simple and custom/Makefile.simple
 	files:
@@ -110,7 +120,7 @@ Installing calc from the bzip2-ed tarball in 4 easy steps:
 	    found below, comment out the Linux set and comment in that
 	    set or edit the gcc set or the common cc set as needed.
 
-	You may want to change these Makrfile variables from their defaults:
+	You may want to change these Makefile variables from their defaults:
 
 	    RANLIB
 
@@ -142,7 +152,7 @@ Installing calc from the bzip2-ed tarball in 4 easy steps:
 
 	The top level Makefile and the custom/Makefile require a GNU
 	Make (such as gmake) or an equivalently advanced make.	On many
-	targets, the default make is sufficent.  On FreeBSD for example,
+	targets, the default make is sufficient.  On FreeBSD for example,
 	one must use gmake instead of make.
 
 	If your target system does not have GNU Make (or equivalent), then
@@ -188,7 +198,7 @@ Installing calc from the bzip2-ed tarball in 4 easy steps:
 We suggest that you might want to read the README.FIRST file and look at
 the calc help subsystem.  See also the README.md file.
 
-## Copyright (C) 1999-2007  Landon Curt Noll
+## Copyright (C) 1999-2007,2021  Landon Curt Noll
 ##
 ## Calc is open software; you can redistribute it and/or modify it under
 ## the terms of the version 2.1 of the GNU Lesser General Public License

Makefile

@@ -8,11 +8,12 @@
 #	 comments, this Makefile differs from the non-rpm bzip2-ed tarball
 #	 source Makefile in the following ways:
 #
-#	 MAKEFILE_REV= $$Revision: 30.26 $$
 #	 CCWERR= -Werror
 #	 USE_READLINE= -DUSE_READLINE
 #	 READLINE_LIB= -lreadline -lhistory -lncurses
 #
+# Copyright (C) 1999-2018,2021  Landon Curt Noll
+#
 # The Makefile.ship makefile becomes the Makefile found in the
 # calc-*.tar.bz2 bzip2 source tarball.
 #
@@ -24,7 +25,7 @@
 #
 # This makefile contains only those critical rules (such as all, clean, etc.)
 # and the common rules needed in development (such as chk, check, etc.).
-# This makefiile has a few special rules that are used to set the version
+# This makefile has a few special rules that are used to set the version
 # string in the shipped makefiles (such as Makefile.ship).
 
 # Copyright (C) 1999-2008,2014  Landon Curt Noll
@@ -52,7 +53,7 @@
 # calculator by David I. Bell with help/mods from others
 # Makefile by Landon Curt Noll
 
-# Try uname -s if the target was not alreadhy set on the make command line
+# Try uname -s if the target was not already set on the make command line
 #
 ifeq ($(target),)
 target=$(shell uname -s 2>/dev/null)
@@ -87,6 +88,12 @@ endif
 #READLINE_INCLUDE= -I/usr/gnu/include
 #READLINE_INCLUDE= -I/usr/local/include
 
+# Where man pages are installed
+#
+# Under macOS, we cannot modify /usr/share/man.
+#
+MANDIR= /usr/local/man/man1
+
 # Normally certain files depend on the Makefile.  If the Makefile is
 # changed, then certain steps should be redone.	 If MAKE_FILE is
 # set to Makefile, then these files will depend on Makefile.  If
@@ -109,7 +116,7 @@ TOP_MAKE_FILE= Makefile
 EXT=
 #EXT=.exe
 
-# This value is configured for chongo@theta.mellis.com.
+# This value is configured for chongo for his laptop
 #
 RPM_TOP= ${HOME}/rpm/calc
 
@@ -169,7 +176,7 @@ V=@:
 #
 XARG=
 
-# We pass these make varaibles to the end of each make command line
+# We pass these make variables to the end of each make command line
 # that invokes the ${MAKE_FILE}.
 #
 XVAR= \
@@ -184,6 +191,7 @@ XVAR= \
 	CCWERR='${CCWERR}' \
 	NROFF='${NROFF}' \
 	COMMON_ADD='${COMMON_ADD}' \
+	MANDIR='${MANDIR}' \
 	Q='${Q}' \
 	V='${V}'
 
@@ -207,30 +215,9 @@ all: fix_version check_include
 	${V} echo '=-=-=-=-= private Makefile $@ rule end =-=-=-=-='
 
 check_include:
-	$(Q) if [ ! -d /usr/include ]; then \
+	${V} echo '=-=-=-=-= private Makefile $@ rule start =-=-=-=-='
-	    echo "ERROR: critical directory missing: /usr/include" 1>&2; \
+	${Q} ${MAKE} ${XARG} -f ${MAKE_FILE} $@ ${XVAR}
-	    echo "Without this critical directory, we cannot compile." 1>&2; \
+	${V} echo '=-=-=-=-= private Makefile $@ rule end =-=-=-=-='
-	    echo 1>&2; \
-	    echo "Perhaps your system isn't setup to compile C source?" 1>&2; \
-	    echo "For example, Apple OS X / darwin requres that XCode" 1>&2; \
-	    echo "must be installed and that you run the command:" 1>&2; \
-	    echo 1>&2; \
-	    echo "    xcode-select --install" 1>&2; \
-	    echo 1>&2; \
-	    exit 1; \
-	fi
-	$(Q) if [ ! -f /usr/include/stdio.h ]; then \
-	    echo "ERROR: critical include files are missing" 1>&2; \
-	    echo "Without this critical directory, we cannot compile." 1>&2; \
-	    echo 1>&2; \
-	    echo "Perhaps your system isn't setup to compile C source?" 1>&2; \
-	    echo "For example, Apple OS X / darwin requres that XCode" 1>&2; \
-	    echo "must be installed and that you run the command:" 1>&2; \
-	    echo 1>&2; \
-	    echo "    xcode-select --install" 1>&2; \
-	    echo 1>&2; \
-	    exit 1; \
-	fi
 
 calc-dynamic-only:
 	${V} echo '=-=-=-=-= private Makefile $@ rule start =-=-=-=-='
@@ -594,7 +581,7 @@ custom/.all:
 
 ###
 #
-# building calc-static and static lib*.a libraires
+# building calc-static and static lib*.a libraries
 #
 ###
 
@@ -623,7 +610,7 @@ libcustcalc.a:
 # Home grown make dependency rules.  Your system make not support
 # or have the needed tools.  You can ignore this section.
 #
-# We will form a skelaton tree of *.c files containing only #include "foo.h"
+# We will form a skeleton tree of *.c files containing only #include "foo.h"
 # lines and .h files containing the same lines surrounded by multiple include
 # prevention lines.  This allows us to build a static depend list that will
 # satisfy all possible cpp symbol definition combinations.
@@ -731,6 +718,9 @@ chk:
 #
 # debug
 #
+# make calcinfo:
+#       * print information about the host and compile environment
+#
 # make env:
 #	* print major Makefile variables
 #
@@ -748,6 +738,11 @@ chk:
 #	* compile without optimizers to make debugging easier
 ##
 
+calcinfo:
+	${V} echo '=-=-=-=-= private Makefile $@ rule start =-=-=-=-='
+	${Q} ${MAKE} ${XARG} -f ${MAKE_FILE} $@ ${XVAR}
+	${V} echo '=-=-=-=-= private Makefile $@ rule end =-=-=-=-='
+
 env:
 	${V} echo '=-=-=-=-= private Makefile $@ rule start =-=-=-=-='
 	${Q} ${MAKE} ${XARG} -f ${MAKE_FILE} $@ ${XVAR}
@@ -848,7 +843,7 @@ inst_files:
 	${Q} ${MAKE} ${XARG} -f ${MAKE_FILE} $@ ${XVAR}
 	${V} echo '=-=-=-=-= private Makefile $@ rule end =-=-=-=-='
 
-# The olduninstall rule will remove calc files from the older, histroic
+# The olduninstall rule will remove calc files from the older, historic
 # locations under the /usr/local directory.  If you are using the
 # new default values for ${BINDIR}, ${CALC_SHAREDIR}, ${INCDIR} and ${LIBDIR}
 # then you can use this rule to clean out the older calc stuff under
@@ -906,7 +901,7 @@ strip:
 	${Q} ${MAKE} ${XARG} -f ${MAKE_FILE} $@ ${XVAR}
 	${V} echo '=-=-=-=-= private Makefile $@ rule end =-=-=-=-='
 
-# calc-symlink - setup symlinks from stardard locations into the ${T} tree
+# calc-symlink - setup symlinks from standard locations into the ${T} tree
 #
 calc-symlink:
 	${V} echo '=-=-=-=-= private Makefile $@ rule start =-=-=-=-='

Makefile.ship

@@ -23,7 +23,7 @@
 #	 READLINE_LIB= -lreadline
 #	 READLINE_EXTRAS= -lhistory -lncurses
 #
-# Copyright (C) 1999-2018  Landon Curt Noll
+# Copyright (C) 1999-2018,2021  Landon Curt Noll
 #
 # Calc is open software; you can redistribute it and/or modify it under
 # the terms of version 2.1 of the GNU Lesser General Public License
@@ -39,8 +39,6 @@
 # received a copy with calc; if not, write to Free Software Foundation, Inc.
 # 59 Temple Place, Suite 330, Boston, MA  02111-1307, USA.
 #
-MAKEFILE_REV= $$Revision: 30.88 $$
-#
 # Under source code control:	1990/02/15 01:48:41
 # File existed as early as:	before 1990
 #
@@ -90,29 +88,29 @@ TERMCONTROL=
 #TERMCONTROL= -DUSE_SGTTY
 #TERMCONTROL= -DUSE_WIN32
 
-# If your system does not have a vsprintf() function, you could be in trouble.
+# If your system does not have a vsnprintf() function, you could be in trouble.
 #
-#	vsprintf(string, format, ap)
+#	vsnprintf(string, size, format, ap)
 #
-# This function works like sprintf except that the 3rd arg is a va_list
+# This function works like spnrintf except that the 4th arg is a va_list
-# strarg (or varargs) list.  Some old systems do not have vsprintf().
+# strarg (or varargs) list.  Some old systems do not have vsnprintf().
-# If you do not have vsprintf(), then calc will try sprintf() and hope
+# If you do not have vsnprintf(), then calc will try snprintf() and hope
 # for the best.
 #
 # A similar problem occurs if your system does not have a vsnprintf()
-# function.  This function is like the vsprintf() function except that
+# function.  This function is like the vsnprintf() function except that
 # there is an extra second argument that controls the maximum size
 # string that is produced.
 #
-# If HAVE_VSPRINTF is empty, this Makefile will run the have_stdvs.c and/or
+# If HAVE_VSNPRINTF is empty, this Makefile will run the have_stdvs.c and/or
-# have_varvs.c program to determine if vsprintf() is supported.  If
+# have_varvs.c program to determine if vsnprintf() is supported.  If
-# HAVE_VSPRINTF is set to -DDONT_HAVE_VSPRINTF then calc will hope that
+# HAVE_VSNPRINTF is set to -DDONT_HAVE_VSNPRINTF then calc will hope that
-# sprintf() will work.
+# snprintf() will work.
 #
-# If in doubt, leave HAVE_VSPRINTF empty.
+# If in doubt, leave HAVE_VSNPRINTF empty.
 #
-HAVE_VSPRINTF=
+HAVE_VSNPRINTF=
-#HAVE_VSPRINTF= -DDONT_HAVE_VSPRINTF
+#HAVE_VSNPRINTF= -DDONT_HAVE_VSNPRINTF
 
 # Determine the byte order of your machine
 #
@@ -575,7 +573,7 @@ HAVE_UNUSED=
 ifeq ($(target),Darwin)
 
 # default INCDIR for macOS
-INCDIR= /usr/local/include
+INCDIR= $(shell xcrun --show-sdk-path --sdk macosx)/usr/include
 
 else
 #endif	/* end of skip for non-Gnu makefiles */
@@ -1028,7 +1026,8 @@ LD_DEBUG=
 #
 #	CALC_ENV= CALCPATH=./cal LD_LIBRARY_PATH=.:./custom DYLD_LIBRARY_PATH=.
 #
-CALC_ENV= CALCPATH=./cal LD_LIBRARY_PATH=. DYLD_LIBRARY_PATH=.
+CALC_ENV= CALCPATH=./cal LD_LIBRARY_PATH=. DYLD_LIBRARY_PATH=. CALCHELP=./help \
+	  CALCCUSTOMHELP=./custom
 #CALC_ENV= CALCPATH=./cal DYLD_LIBRARY_PATH=. \
 #	  MALLOC_VERBOSE=1 MALLOC_TRACING=1 \
 #	  MALLOC_FASTCHK=1 MALLOC_FULLWARN=1 LD_LIBRARY_PATH=.:./custom
@@ -1054,7 +1053,7 @@ EXT=
 
 # The default calc versions
 #
-VERSION= 2.12.6.5
+VERSION= 2.12.8.2
 
 # Names of shared libraries with versions
 #
@@ -1064,34 +1063,39 @@ LIB_EXT_VERSION= ${LIB_EXT}.${VERSION}
 # standard utilities used during make
 #
 SHELL= /bin/sh
-LANG= C
+AR= ar
-MAKE= make
 AWK= awk
-SED= sed
+CAT= cat
-DIFF= diff
-GREP= egrep
-SORT= sort
-TEE= tee
-CTAGS= ctags
 CHMOD= chmod
-FMT= fmt
-XARGS= xargs
 CMP= cmp
+CO= co
+COL= col
+CP= cp
+CTAGS= ctags
+DATE= date
+DIFF= diff
+FMT= fmt
+GREP= egrep
+HOSTNAME= hostname
+LANG= C
+LDCONFIG= ldconfig
+LN= ln
+MAKE= make
 MKDIR= mkdir
+MV= mv
+PWDCMD= pwd
+RM= rm
+RMDIR= rmdir
+SED= sed
+SORT= sort
 SPLINT= splint
 SPLINT_OPTS=
-RM= rm
+TEE= tee
 TOUCH= touch
-RMDIR= rmdir
-CP= cp
-MV= mv
-CO= co
-AR= ar
 TRUE= true
-CAT= cat
+UNAME= uname
-COL= col
+XARGS= xargs
-LN= ln
+
-LDCONFIG= ldconfig
 # assume the X11 makedepend tool for the depend rule
 MAKEDEPEND= makedepend
 STRIP= strip
@@ -1116,16 +1120,26 @@ STRIP= strip
 EXTRA_CFLAGS=
 EXTRA_LDFLAGS=
 
+# Architecture compile flags
+#
+# The ARCH_CFLAGS are ${CC} when compiling C files. They follow
+# CCMISC and precede EXTRA_CFLAGS.
+#
+ARCH_CFLAGS= -march=native
+#ARCH_CFLAGS=
+
 # COMMON_CFLAGS are the common ${CC} flags used for all programs, both
 #	    intermediate and final calc and calc related programs
 #
 #if 0	/* start of skip for non-Gnu makefiles */
 ifdef ALLOW_CUSTOM
 #endif	/* end of skip for non-Gnu makefiles */
-COMMON_CFLAGS= -DCALC_SRC ${ALLOW_CUSTOM} ${CCWARN} ${CCMISC} ${EXTRA_CFLAGS}
+COMMON_CFLAGS= -DCALC_SRC ${ALLOW_CUSTOM} ${CCWARN} \
+    ${CCMISC} ${ARCH_CFLAGS} ${EXTRA_CFLAGS}
 #if 0	/* start of skip for non-Gnu makefiles */
 else
-COMMON_CFLAGS= -DCALC_SRC -UCUSTOM ${CCWARN} ${CCMISC} ${EXTRA_CFLAGS}
+COMMON_CFLAGS= -DCALC_SRC -UCUSTOM ${CCWARN} \
+    ${CCMISC} ${ARCH_CFLAGS} ${EXTRA_CFLAGS}
 endif
 #endif	/* end of skip for non-Gnu makefiles */
 
@@ -1192,7 +1206,7 @@ COMMON_LDFLAGS= ${EXTRA_LDFLAGS}
 #									 #
 #		calc-contrib at asthe dot com				 #
 #									 #
-#	EMail address an "ifeq ($(target),YOUR_TARGET_NAME)" ... "endif" #
+#	Email address an "ifeq ($(target),YOUR_TARGET_NAME)" ... "endif" #
 #	set of lines so that we can consider them for the next release.  #
 ##########################################################################
 
@@ -1900,6 +1914,7 @@ SAMPLE_OBJ= sample_many.o sample_rand.o
 CUSTOM_PASSDOWN=  \
     ALLOW_CUSTOM="${ALLOW_CUSTOM}" \
     AR=${AR} \
+    ARCH_CFLAGS=${ARCH_CFLAGS} \
     AWK=${AWK} \
     BINDIR="${BINDIR}" \
     BLD_TYPE="${BLD_TYPE}" \
@@ -2073,7 +2088,7 @@ LICENSE= COPYING COPYING-LGPL
 #
 DISTLIST= ${C_SRC} ${H_SRC} ${MAKE_FILE} BUGS CHANGES LIBRARY README.FIRST \
 	  README.WINDOWS calc.man HOWTO.INSTALL ${UTIL_MISC_SRC} ${LICENSE} \
-	  sample.README calc.spec.in rpm.mk README.md
+	  sample.README calc.spec.in rpm.mk README.md QUESTIONS CONTRIB-CODE
 
 # These files are used to make (but not build) a calc .a link library
 #
@@ -2179,25 +2194,15 @@ TARGETS= ${EARLY_TARGETS} ${BLD_TYPE} ${LATE_TARGETS}
 all: check_include ${BLD_TYPE} CHANGES
 
 check_include:
-	$(Q) if [ ! -d /usr/include ]; then \
+	$(Q) if ! echo '#include <stdio.h>' | ${CC} -E - >/dev/null 2>&1; then \
-	    echo "ERROR: critical directory missing: /usr/include" 1>&2; \
+	    echo "ERROR: Missing critical <stdio.h> include file." 1>&2; \
-	    echo "Without this critical directory, we cannot compile." 1>&2; \
+	    echo "Without critical include files, we cannot compile." 1>&2; \
-	    echo 1>&2; \
 	    echo "Perhaps your system isn't setup to compile C source?" 1>&2; \
-	    echo "For example, Apple OS X / darwin requres that XCode" 1>&2; \
-	    echo "must be installed and that you run the command:" 1>&2; \
 	    echo 1>&2; \
-	    echo "    xcode-select --install" 1>&2; \
+	    echo "For example, Apple macOS / Darwin requires that XCode" 1>&2; \
+	    echo "must be installed." 1>&2; \
 	    echo 1>&2; \
-	    exit 1; \
+	    echo "Also macOS users might later to run this command:" 1>&2; \
-	fi
-	$(Q) if [ ! -f /usr/include/stdio.h ]; then \
-	    echo "ERROR: critical include files are missing" 1>&2; \
-	    echo "Without this critical directory, we cannot compile." 1>&2; \
-	    echo 1>&2; \
-	    echo "Perhaps your system isn't setup to compile C source?" 1>&2; \
-	    echo "For example, Apple OS X / darwin requres that XCode" 1>&2; \
-	    echo "must be installed and that you run the command:" 1>&2; \
 	    echo 1>&2; \
 	    echo "    xcode-select --install" 1>&2; \
 	    echo 1>&2; \
@@ -2321,6 +2326,7 @@ calc.1: calc.man ${MAKE_FILE}
 	        -e 's,$${CALC_INCDIR},${CALC_INCDIR},g' \
 	        -e 's,$${CUSTOMCALDIR},${CUSTOMCALDIR},g' \
 	        -e 's,$${CUSTOMINCDIR},${CUSTOMINCDIR},g' \
+	        -e 's,$${HELPDIR},${HELPDIR},g' \
 	        -e 's,$${CUSTOMHELPDIR},${CUSTOMHELPDIR},g' \
 	        -e 's,$${CALCRC},${CALCRC},g' < calc.man > calc.1
 	${Q} echo calc.1 formed
@@ -2332,7 +2338,7 @@ calc.usage: calc.1 ${MAKE_FILE}
 	    LESSCHARSET=iso8859 ${CALCPAGER} calc.1; \
 	else \
 	    ${NROFF} -man calc.1; \
-	fi | ${COL} -b > $@
+	fi 2>&1 | ${GREP} -v 'cannot adjust line' | ${COL} -b > $@
 	${Q} echo calc.usage formed
 
 
@@ -2477,22 +2483,15 @@ endian_calc.h: endian${EXT} ${MAKE_FILE}
 	${Q} echo '' >> endian_calc.h
 	${Q} echo '/* what byte order are we? */' >> endian_calc.h
 	-${Q} if [ X"${CALC_BYTE_ORDER}" = X ]; then \
-	    if [ -f ${INCDIR}/endian.h ]; then \
+	    if echo '#include <endian.h>' | ${CC} -E - >/dev/null 2>&1; then \
 		echo '#include <endian.h>' >> endian_calc.h; \
 		echo '#define CALC_BYTE_ORDER BYTE_ORDER' >> endian_calc.h; \
-	    elif [ -f ${INCDIR}/machine/endian.h ]; then \
+	    elif echo '#include <machine/endian.h>' | \
+		 ${CC} -E - >/dev/null 2>&1; then \
 		echo '#include <machine/endian.h>' >> endian_calc.h; \
 		echo '#define CALC_BYTE_ORDER BYTE_ORDER' >> endian_calc.h; \
-	    elif [ -f ${INCDIR}/sys/endian.h ]; then \
+	    elif echo '#include <sys/endian.h>' | \
-		echo '#include <sys/endian.h>' >> endian_calc.h; \
+		 ${CC} -E- >/dev/null 2>&1; then \
-		echo '#define CALC_BYTE_ORDER BYTE_ORDER' >> endian_calc.h; \
-	    elif [ -f /usr/include/endian.h ]; then \
-		echo '#include <endian.h>' >> endian_calc.h; \
-		echo '#define CALC_BYTE_ORDER BYTE_ORDER' >> endian_calc.h; \
-	    elif [ -f /usr/include/machine/endian.h ]; then \
-		echo '#include <machine/endian.h>' >> endian_calc.h; \
-		echo '#define CALC_BYTE_ORDER BYTE_ORDER' >> endian_calc.h; \
-	    elif [ -f /usr/include/sys/endian.h ]; then \
 		echo '#include <sys/endian.h>' >> endian_calc.h; \
 		echo '#define CALC_BYTE_ORDER BYTE_ORDER' >> endian_calc.h; \
 	    else \
@@ -2559,9 +2558,7 @@ have_times.h: ${MAKE_FILE}
 	    echo '#define HAVE_TIMES_H	/* yes */' >> have_times.h; \
 	elif [ X"${HAVE_TIMES_H}" = X"NO" ]; then \
 	    echo '#undef HAVE_TIMES_H  /* no */' >> have_times.h; \
-	elif [ -f ${INCDIR}/times.h ]; then \
+	elif echo '#include <times.h>' | ${CC} -E - >/dev/null 2>&1; then \
-	    echo '#define HAVE_TIMES_H	/* yes */' >> have_times.h; \
-	elif [ -f /usr/include/times.h ]; then \
 	    echo '#define HAVE_TIMES_H	/* yes */' >> have_times.h; \
 	else \
 	    echo '#undef HAVE_TIMES_H  /* no */' >> have_times.h; \
@@ -2570,9 +2567,7 @@ have_times.h: ${MAKE_FILE}
 	    echo '#define HAVE_SYS_TIMES_H	/* yes */' >> have_times.h; \
 	elif [ X"${HAVE_SYS_TIMES_H}" = X"NO" ]; then \
 	    echo '#undef HAVE_SYS_TIMES_H  /* no */' >> have_times.h; \
-	elif [ -f ${INCDIR}/sys/times.h ]; then \
+	elif echo '#include <sys/times.h>' | ${CC} -E - >/dev/null 2>&1; then \
-	    echo '#define HAVE_SYS_TIMES_H  /* yes */' >> have_times.h; \
-	elif [ -f /usr/include/sys/times.h ]; then \
 	    echo '#define HAVE_SYS_TIMES_H  /* yes */' >> have_times.h; \
 	else \
 	    echo '#undef HAVE_SYS_TIMES_H  /* no */' >> have_times.h; \
@@ -2581,9 +2576,7 @@ have_times.h: ${MAKE_FILE}
 	    echo '#define HAVE_TIME_H	/* yes */' >> have_times.h; \
 	elif [ X"${HAVE_TIME_H}" = X"NO" ]; then \
 	    echo '#undef HAVE_TIME_H  /* no */' >> have_times.h; \
-	elif [ -f ${INCDIR}/time.h ]; then \
+	elif echo '#include <time.h>' | ${CC} -E - >/dev/null 2>&1; then \
-	    echo '#define HAVE_TIME_H  /* yes */' >> have_times.h; \
-	elif [ -f /usr/include/time.h ]; then \
 	    echo '#define HAVE_TIME_H  /* yes */' >> have_times.h; \
 	else \
 	    echo '#undef HAVE_TIME_H  /* no */' >> have_times.h; \
@@ -2592,9 +2585,7 @@ have_times.h: ${MAKE_FILE}
 	    echo '#define HAVE_SYS_TIME_H	/* yes */' >> have_times.h; \
 	elif [ X"${HAVE_SYS_TIME_H}" = X"NO" ]; then \
 	    echo '#undef HAVE_SYS_TIME_H  /* no */' >> have_times.h; \
-	elif [ -f ${INCDIR}/sys/time.h ]; then \
+	elif echo '#include <sys/time.h>' | ${CC} -E - >/dev/null 2>&1; then \
-	    echo '#define HAVE_SYS_TIME_H  /* yes */' >> have_times.h; \
-	elif [ -f /usr/include/sys/time.h ]; then \
 	    echo '#define HAVE_SYS_TIME_H  /* yes */' >> have_times.h; \
 	else \
 	    echo '#undef HAVE_SYS_TIME_H  /* no */' >> have_times.h; \
@@ -2630,9 +2621,7 @@ have_stdlib.h: ${MAKE_FILE}
 	    echo '#define HAVE_STDLIB_H	/* yes */' >> have_stdlib.h; \
 	elif [ X"${HAVE_STDLIB_H}" = X"NO" ]; then \
 	    echo '#undef HAVE_STDLIB_H  /* no */' >> have_stdlib.h; \
-	elif [ -f ${INCDIR}/stdlib.h ]; then \
+	elif echo '#include <stdlib.h>' | ${CC} -E - >/dev/null 2>&1; then \
-	    echo '#define HAVE_STDLIB_H	 /* yes */' >> have_stdlib.h; \
-	elif [ -f /usr/include/stdlib.h ]; then \
 	    echo '#define HAVE_STDLIB_H	 /* yes */' >> have_stdlib.h; \
 	else \
 	    echo '#undef HAVE_STDLIB_H	/* no */' >> have_stdlib.h; \
@@ -2668,9 +2657,7 @@ have_unistd.h: ${MAKE_FILE}
 	    echo '#define HAVE_UNISTD_H	/* yes */' >> have_unistd.h; \
 	elif [ X"${HAVE_UNISTD_H}" = X"NO" ]; then \
 	    echo '#undef HAVE_UNISTD_H  /* no */' >> have_unistd.h; \
-	elif [ -f ${INCDIR}/unistd.h ]; then \
+	elif echo '#include <unistd.h>' | ${CC} -E - >/dev/null 2>&1; then \
-	    echo '#define HAVE_UNISTD_H	 /* yes */' >> have_unistd.h; \
-	elif [ -f /usr/include/unistd.h ]; then \
 	    echo '#define HAVE_UNISTD_H	 /* yes */' >> have_unistd.h; \
 	else \
 	    echo '#undef HAVE_UNISTD_H	/* no */' >> have_unistd.h; \
@@ -2706,9 +2693,7 @@ have_string.h: ${MAKE_FILE}
 	    echo '#define HAVE_STRING_H	/* yes */' >> have_string.h; \
 	elif [ X"${HAVE_STRING_H}" = X"NO" ]; then \
 	    echo '#undef HAVE_STRING_H  /* no */' >> have_string.h; \
-	elif [ -f ${INCDIR}/string.h ]; then \
+	elif echo '#include <string.h>' | ${CC} -E - >/dev/null 2>&1; then \
-	    echo '#define HAVE_STRING_H	 /* yes */' >> have_string.h; \
-	elif [ -f /usr/include/string.h ]; then \
 	    echo '#define HAVE_STRING_H	 /* yes */' >> have_string.h; \
 	else \
 	    echo '#undef HAVE_STRING_H	/* no */' >> have_string.h; \
@@ -2748,22 +2733,12 @@ terminal.h: ${MAKE_FILE}
 	    echo '#undef USE_TERMIOS   /* <termios.h> */' >> terminal.h; \
 	    echo '#undef USE_TERMIO    /* <termio.h> */' >> terminal.h; \
 	    echo '#undef USE_SGTTY     /* <sys/ioctl.h> */' >> terminal.h; \
-	elif [ -f ${INCDIR}/termios.h ]; then \
+	elif echo '#include <termios.h>' | ${CC} -E - >/dev/null 2>&1; then \
 	    echo '/* use termios */' >> terminal.h; \
 	    echo '#define USE_TERMIOS  /* <termios.h> */' >> terminal.h; \
 	    echo '#undef USE_TERMIO    /* <termio.h> */' >> terminal.h; \
 	    echo '#undef USE_SGTTY     /* <sys/ioctl.h> */' >> terminal.h; \
-	elif [ -f ${INCDIR}/termio.h ]; then \
+	elif echo '#include <termio.h>' | ${CC} -E - >/dev/null 2>&1; then \
-	    echo '/* use termio */' >> terminal.h; \
-	    echo '#undef USE_TERMIOS   /* <termios.h> */' >> terminal.h; \
-	    echo '#define USE_TERMIO   /* <termio.h> */' >> terminal.h; \
-	    echo '#undef USE_SGTTY     /* <sys/ioctl.h> */' >> terminal.h; \
-	elif [ -f /usr/include/termios.h ]; then \
-	    echo '/* use termios */' >> terminal.h; \
-	    echo '#define USE_TERMIOS  /* <termios.h> */' >> terminal.h; \
-	    echo '#undef USE_TERMIO    /* <termio.h> */' >> terminal.h; \
-	    echo '#undef USE_SGTTY     /* <sys/ioctl.h> */' >> terminal.h; \
-	elif [ -f /usr/include/termio.h ]; then \
 	    echo '/* use termio */' >> terminal.h; \
 	    echo '#undef USE_TERMIOS   /* <termios.h> */' >> terminal.h; \
 	    echo '#define USE_TERMIO   /* <termio.h> */' >> terminal.h; \
@@ -2955,7 +2930,7 @@ have_const.h: have_const.c ${MAKE_FILE}
 	    ${TRUE}; \
 	fi
 
-have_offscl.h: have_offscl.c ${MAKE_FILE}
+have_offscl.h: have_offscl.c have_unistd.h ${MAKE_FILE}
 	${Q} ${RM} -f offscl_tmp have_offscl.h
 	${Q} echo 'forming have_offscl.h'
 	${Q} echo '/*' > have_offscl.h
@@ -2995,7 +2970,7 @@ have_offscl.h: have_offscl.c ${MAKE_FILE}
 	    ${TRUE}; \
 	fi
 
-have_posscl.h: have_posscl.c have_fpos.h ${MAKE_FILE}
+have_posscl.h: have_posscl.c have_fpos.h have_unistd.h ${MAKE_FILE}
 	${Q} ${RM} -f have_posscl have_posscl.o posscl_tmp have_posscl.h
 	${Q} echo 'forming have_posscl.h'
 	${Q} echo '/*' > have_posscl.h
@@ -3251,7 +3226,7 @@ have_ustat.h: have_ustat.c ${MAKE_FILE}
 	    ${TRUE}; \
 	fi
 
-have_getsid.h: have_getsid.c ${MAKE_FILE}
+have_getsid.h: have_getsid.c have_unistd.h ${MAKE_FILE}
 	${Q} ${RM} -f getsid_tmp have_getsid.h
 	${Q} echo 'forming have_getsid.h'
 	${Q} echo '/*' > have_getsid.h
@@ -3291,7 +3266,7 @@ have_getsid.h: have_getsid.c ${MAKE_FILE}
 	    ${TRUE}; \
 	fi
 
-have_getpgid.h: have_getpgid.c ${MAKE_FILE}
+have_getpgid.h: have_getpgid.c have_unistd.h ${MAKE_FILE}
 	${Q} ${RM} -f getpgid_tmp have_getpgid.h
 	${Q} echo 'forming have_getpgid.h'
 	${Q} echo '/*' > have_getpgid.h
@@ -3373,7 +3348,7 @@ have_gettime.h: have_gettime.c ${MAKE_FILE}
 	    ${TRUE}; \
 	fi
 
-have_getprid.h: have_getprid.c ${MAKE_FILE}
+have_getprid.h: have_getprid.c have_unistd.h ${MAKE_FILE}
 	${Q} ${RM} -f getprid_tmp have_getprid.h
 	${Q} echo 'forming have_getprid.h'
 	${Q} echo '/*' > have_getprid.h
@@ -3545,7 +3520,7 @@ args.h: have_stdvs.c have_varvs.c have_string.h have_unistd.h have_string.h
 	${Q} echo '' >> args.h
 	${Q} echo '' >> args.h
 	${Q} ${RM} -f have_stdvs.o have_stdvs${EXT}
-	-${Q} ${LCC} ${ICFLAGS} ${HAVE_VSPRINTF} have_stdvs.c -c \
+	-${Q} ${LCC} ${ICFLAGS} ${HAVE_VSNPRINTF} have_stdvs.c -c \
 		>/dev/null 2>&1; ${TRUE}
 	-${Q} ${LCC} ${ILDFLAGS} have_stdvs.o -o have_stdvs${EXT} \
 	    >/dev/null 2>&1; ${TRUE}
@@ -3554,10 +3529,10 @@ args.h: have_stdvs.c have_varvs.c have_string.h have_unistd.h have_string.h
 	else \
 	    ${TRUE}; \
 	fi
-	-${Q} if [ ! -f have_args.sh ] && [ X"${HAVE_VSPRINTF}" = X ]; then \
+	-${Q} if [ ! -f have_args.sh ] && [ X"${HAVE_VSNPRINTF}" = X ]; then \
 	    ${RM} -f have_stdvs.o have_stdvs${EXT} have_varvs.o; \
 	    ${RM} -f have_varvs${EXT}; \
-	    ${LCC} ${ICFLAGS} ${HAVE_VSPRINTF} have_varvs.c -c \
+	    ${LCC} ${ICFLAGS} ${HAVE_VSNPRINTF} have_varvs.c -c \
 		    2>/dev/null; \
 	    ${LCC} ${ILDFLAGS} have_varvs.o -o have_varvs${EXT} 2>/dev/null; \
 	    if ./have_varvs${EXT} >>args.h 2>/dev/null; then \
@@ -3573,8 +3548,8 @@ args.h: have_stdvs.c have_varvs.c have_string.h have_unistd.h have_string.h
 	else \
 	    echo 'exit 1' > have_args.sh; \
 	    echo "Unable to determine what type of variable args and"; \
-	    echo "what type of vsprintf() should be used.  Set or change"; \
+	    echo "what type of vsnprintf() should be used.  Set or change"; \
-	    echo "the Makefile variable HAVE_VSPRINTF."; \
+	    echo "the Makefile variable HAVE_VSNPRINTF."; \
 	fi
 	${Q} sh ./have_args.sh
 	${Q} echo '' >> args.h
@@ -4057,12 +4032,18 @@ check: all ./cal/regress.cal
 chk: ./cal/regress.cal
 	${V} echo '=-=-=-=-= ${MAKE_FILE} start of $@ rule =-=-=-=-='
 	${CALC_ENV} ./calc${EXT} -d -q read regress 2>&1 | ${AWK} -f check.awk
+	@${MAKE} -f Makefile Q= V=@ distdir >/dev/null 2>&1
+	@${MAKE} -f Makefile Q= V=@ distlist >/dev/null 2>&1
+	${Q} echo 'chk OK'
 	${V} echo '=-=-=-=-= ${MAKE_FILE} end of $@ rule =-=-=-=-='
 
 ###
 #
 # debug
 #
+# make calcinfo:
+#	* print information about the host and compile environment
+#
 # make env:
 #	* print major Makefile variables
 #
@@ -4077,11 +4058,59 @@ chk: ./cal/regress.cal
 #	* run the regression tests
 ###
 
+calcinfo:
+	@echo '=-=-=-=-= ${MAKE_FILE} start of $@ rule =-=-=-=-='
+	@echo
+	@echo '=-=-= UNAME=${UNAME} =-=-='
+	@echo
+	@echo '=-=-= output of $${UNAME} -a follows =-=-='
+	-@${UNAME} -a
+	@echo '=-=-= end of output of $${UNAME} -a =-=-='
+	@echo
+	@echo '=-=-= HOSTNAME=${HOSTNAME} =-=-='
+	@echo
+	@echo '=-=-= output of $${HOSTNAME} follows =-=-='
+	-@${HOSTNAME}
+	@echo '=-=-= end of output of $${HOSTNAME} =-=-='
+	@echo
+	@echo '=-=-= DATE=${DATE} =-=-='
+	@echo
+	@echo '=-=-= output of $${DATE} follows =-=-='
+	-@${DATE}
+	@echo '=-=-= end of output of $${DATE} =-=-='
+	@echo
+	@echo '=-=-= LCC=${LCC} =-=-='
+	@echo
+	@echo '=-=-= output of $${LCC} -v follows =-=-='
+	-@${LCC} -v
+	@echo '=-=-= end of output of $${LCC} -v =-=-='
+	@echo
+	@echo '=-=-= PWD=${PWD} =-=-='
+	@echo
+	@echo '=-=-= output of echo $${PWD} follows =-=-='
+	-@echo ${PWD}
+	@echo '=-=-= end of output of echo $${PWD} =-=-='
+	@echo
+	@echo '=-=-= PWDCMD=${PWDCMD} =-=-='
+	@echo
+	@echo '=-=-= output of $${PWDCMD} follows =-=-='
+	-@${PWDCMD}
+	@echo '=-=-= end of output of $${PWDCMD} =-=-='
+	@echo
+	@echo '=-=-= VERSION=${VERSION} =-=-='
+	@echo
+	@echo '=-=-= output of echo $${VERSION} follows =-=-='
+	-@echo ${VERSION}
+	@echo '=-=-= end of output of echo $${VERSION} =-=-='
+	@echo
+	@echo '=-=-=-=-= ${MAKE_FILE} end of $@ rule =-=-=-=-='
+
 env:
 	@echo '=-=-=-=-= dumping major make variables =-=-=-=-='
 	@echo 'ALIGN32=${ALIGN32}'; echo ''
 	@echo 'ALLOW_CUSTOM=${ALLOW_CUSTOM}'; echo ''
 	@echo 'AR=${AR}'; echo ''
+	@echo 'ARCH_CFLAGS=${ARCH_CFLAGS}'; echo ''
 	@echo 'AWK=${AWK}'; echo ''
 	@echo 'BINDIR=${BINDIR}'; echo ''
 	@echo 'BLD_TYPE=${BLD_TYPE}'; echo ''
@@ -4126,6 +4155,7 @@ env:
 	@echo 'CUSTOMINCDIR=${CUSTOMINCDIR}'; echo ''
 	@echo 'CUSTOM_PASSDOWN=${CUSTOM_PASSDOWN}'; echo ''
 	@echo 'C_SRC=${C_SRC}'; echo ''
+	@echo 'DATE=${DATE}'; echo ''
 	@echo 'DEBUG=${DEBUG}'; echo ''
 	@echo 'DEFAULT_LIB_INSTALL_PATH=${DEFAULT_LIB_INSTALL_PATH}'; echo ''
 	@echo 'DEV_BITS=${DEV_BITS}'; echo ''
@@ -4160,9 +4190,10 @@ env:
 	@echo 'HAVE_UNUSED=${HAVE_UNUSED}'; echo ''
 	@echo 'HAVE_URANDOM_H=${HAVE_URANDOM_H}'; echo ''
 	@echo 'HAVE_USTAT=${HAVE_USTAT}'; echo ''
-	@echo 'HAVE_VSPRINTF=${HAVE_VSPRINTF}'; echo ''
+	@echo 'HAVE_VSNPRINTF=${HAVE_VSNPRINTF}'; echo ''
 	@echo 'HELPDIR=${HELPDIR}'; echo ''
 	@echo 'HELP_PASSDOWN=${HELP_PASSDOWN}'; echo ''
+	@echo 'HOSTNAME=${HOSTNAME}'; echo ''
 	@echo 'H_SRC=${H_SRC}'; echo ''
 	@echo 'ICFLAGS=${ICFLAGS}'; echo ''
 	@echo 'ILDFLAGS=${ILDFLAGS}'; echo ''
@@ -4186,7 +4217,6 @@ env:
 	@echo 'LONG_BITS=${LONG_BITS}'; echo ''
 	@echo 'MAKE=${MAKE}'; echo ''
 	@echo 'MAKEDEPEND=${MAKEDEPEND}'; echo ''
-	@echo 'MAKEFILE_REV=${MAKEFILE_REV}'; echo ''
 	@echo 'MAKE_FILE=${MAKE_FILE}'; echo ''
 	@echo 'MANDIR=${MANDIR}'; echo ''
 	@echo 'MANEXT=${MANEXT}'; echo ''
@@ -4199,6 +4229,8 @@ env:
 	@echo 'OBJS=${OBJS}'; echo ''
 	@echo 'OFF_T_BITS=${OFF_T_BITS}'; echo ''
 	@echo 'PURIFY=${PURIFY}'; echo ''
+	@echo 'PWD=${PWD}'; echo ''
+	@echo 'PWDCMD=${PWDCMD}'; echo ''
 	@echo 'Q=${Q}'; echo ''
 	@echo 'RANLIB=${RANLIB}'; echo ''
 	@echo 'READLINE_EXTRAS=${READLINE_EXTRAS}'; echo ''
@@ -4225,11 +4257,12 @@ env:
 	@echo 'TOP_MAKE_FILE=${TOP_MAKE_FILE}'; echo ''
 	@echo 'TOUCH=${TOUCH}'; echo ''
 	@echo 'TRUE=${TRUE}'; echo ''
+	@echo 'UNAME=${UNAME}'; echo ''
 	@echo 'USE_READLINE=${USE_READLINE}'; echo ''
 	@echo 'UTIL_C_SRC=${UTIL_C_SRC}'; echo ''
+	@echo 'UTIL_FILES=${UTIL_FILES}'; echo ''
 	@echo 'UTIL_MISC_SRC=${UTIL_MISC_SRC}'; echo ''
 	@echo 'UTIL_OBJS=${UTIL_OBJS}'; echo ''
-	@echo 'UTIL_FILES=${UTIL_FILES}'; echo ''
 	@echo 'UTIL_PROGS=${UTIL_PROGS}'; echo ''
 	@echo 'UTIL_TMP=${UTIL_TMP}'; echo ''
 	@echo 'V=${V}'; echo ''
@@ -4251,7 +4284,7 @@ mkdebug: env version.c
 	@echo '=-=-=-= Back to the main Makefile for $@ rule =-=-=-='
 	@echo '=-=-=-=-= ${MAKE_FILE} end of $@ rule =-=-=-=-='
 
-debug: env
+debug: calcinfo env
 	@echo '=-=-=-=-= ${MAKE_FILE} start of $@ rule =-=-=-=-='
 	@echo '=-=-=-= Invoking ${MAKE} -f Makefile Q= V=@ clobber =-=-=-='
 	@${MAKE} -f Makefile Q= V=@ clobber
@@ -4266,7 +4299,7 @@ debug: env
 	@echo '=-=-=-= Back to the main Makefile for $@ rule =-=-=-='
 	@echo -n '=-=-=-= Print #defile values if custom functions '
 	@echo 'are allowed =-=-=-='
-	-@./calc${EXT} -e -q -C 'print custom("sysinfo", 2);'
+	-@${CALC_ENV} ./calc${EXT} -e -q -C 'print custom("sysinfo", 2);'
 	@echo '=-=-=-= Back to the main Makefile for $@ rule =-=-=-='
 	@echo '=-=-=-= Invoking ${MAKE} -f Makefile Q= V=@ check =-=-=-='
 	@echo '=-=-= this may take a while =-=-='
@@ -5478,6 +5511,7 @@ help.o: have_string.h
 help.o: have_unistd.h
 help.o: help.c
 help.o: longbits.h
+help.o: lib_calc.h
 help.o: nametype.h
 help.o: qmath.h
 help.o: sha1.h
@@ -5504,6 +5538,7 @@ hist.o: have_unistd.h
 hist.o: have_unused.h
 hist.o: hist.c
 hist.o: hist.h
+hist.o: lib_calc.h
 hist.o: longbits.h
 hist.o: nametype.h
 hist.o: qmath.h

QUESTIONS

@@ -0,0 +1,54 @@
+If you have a simple general question about calc, send Email to:
+
+    calc-quest-mail at asthe dot com
+
+    NOTE: Remove spaces and replace 'at' with @, and 'dot' with .
+
+PLEASE put following the SPECIAL PHRASE somewhere in your Email Subject line:
+
+    calc question
+
+You may add additional words to your subject line.
+
+IMPORTANT: If your Email doesn't contain the above phrase,
+	   then we WILL NOT SEE your Email.
+
+PLEASE BE SURE you have that SPECIAL PHRASE somewhere in the subject line!
+
+Suggestion:
+
+    From time to time, the Email address and Subject SPECIAL PHRASE
+    may change so verify you have the current info by visiting:
+
+	http://www.isthe.com/chongo/tech/comp/calc/calc-question.html
+
+Please limit your questions to general questions about calc.  We
+cannot go into great detail in our answers, nor can we do your
+homework, nor can we do much more than answer short general questions
+about calc.
+
+Please be patient as we cannot always respond to Email messages quickly.
+
+=-=
+
+## Copyright (C) 2021  Landon Curt Noll
+##
+## Calc is open software; you can redistribute it and/or modify it under
+## the terms of the version 2.1 of the GNU Lesser General Public License
+## as published by the Free Software Foundation.
+##
+## Calc is distributed in the hope that it will be useful, but WITHOUT
+## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+## or FITNESS FOR A PARTICULAR PURPOSE.	 See the GNU Lesser General
+## Public License for more details.
+##
+## A copy of version 2.1 of the GNU Lesser General Public License is
+## distributed with calc under the filename COPYING-LGPL.  You should have
+## received a copy with calc; if not, write to Free Software Foundation, Inc.
+## 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+##
+## Under source code control:	2021/02/10 00:15:05
+## File existed as early as:	2021
+##
+## chongo <was here> /\oo/\	http://www.isthe.com/chongo/
+## Share and enjoy!  :-)	http://www.isthe.com/chongo/tech/comp/calc/

README.FIRST

@@ -32,30 +32,30 @@ something that you type in.
 
 For list of help topics:
 
-    > help
+    ; help
 
 For overview of calc overview:
 
-    > help intro
+    ; help intro
-    > help overview
+    ; help overview
-    > help command
+    ; help command
-    > help define
+    ; help define
-    > help statement
+    ; help statement
-    > help variable
+    ; help variable
-    > help usage
+    ; help usage
 
 For list of builtin functions:
 
-    > help builtin
+    ; help builtin
 
 C programmers should note some unexpected differences in the calc syntax:
 
-    > help unexpected
+    ; help unexpected
 
 Calc is shipped with a standard collection of calc resource files.
 For a list of calc standard resource files see:
 
-    > help resource
+    ; help resource
 
 =-=
 
@@ -71,66 +71,33 @@ or run:
 
 for a wish/todo list.  Code contributions are welcome.
 
-=-=
+-=-
 
-To subscribe to the calc-tester mailing list, visit the following URL:
+If you you notice something wrong, strange or broken, see the file:
 
-	http://www.isthe.com/chongo/tech/comp/calc/calc-tester.html
+    BUGS
 
-    This is a low volume moderated mailing list.
+or run:
 
-    This mailing list replaces calc-tester at asthe dot com list.
+    calc help bugs
 
-    If you need a human to help you with your mailing list subscription,
+for information about how to report a bug.
-    please send EMail to our special:
-
-	calc-tester-maillist-help at asthe dot com
-
-	NOTE: Remove spaces and replace 'at' with @, 'dot' with .
-
-    address.  To be sure we see your EMail asking for help with your
-    mailing list subscription, please use the following phase in your
-    EMail Subject line:
-
-	calc tester mailing list help
-
-    That phrase in your subject line will help ensure your
-    request will get past our anti-spam filters.  You may have
-    additional words in your subject line.
 
 -=-
 
-Calc bug reports and calc bug fixes should be sent to:
+If you have a general question about calc, see the file:
 
-	calc-bug-report at asthe dot com
+    QUESTIONS
 
-	NOTE: Remove spaces and replace 'at' with @, 'dot' with .
+or run:
 
-    This replaces the old calc-bugs at asthe dot com address.
+    calc help questions
 
-    To be sure we see your EMail reporting a calc bug, please use the
+for information about how to ask a question.
-    following phase in your EMail Subject line:
-
-	calc bug report
-
-    That phrase in your subject line will help ensure your
-    request will get past our anti-spam filters.  You may have
-    additional words in your subject line.
-
-    However, you may find it more helpful to simply subscribe
-    to the calc-tester mailing list (see above) and then to
-    send your report to that mailing list as a wider set calc
-    testers may be able to help you.
 
 -=-
 
-The calc web site is located at:
+## Copyright (C) 1999,2014,2017,2021  Landon Curt Noll
-
-    http://www.isthe.com/chongo/tech/comp/calc/
-
-NOTE: The EMail address uses 'asthe', while the web site uses 'isthe'.
-
-## Copyright (C) 1999,2014,2017  Landon Curt Noll
 ##
 ## Calc is open software; you can redistribute it and/or modify it under
 ## the terms of the version 2.1 of the GNU Lesser General Public License

README.md

@@ -1,6 +1,9 @@
 # What is calc?
 
 Calc is an interactive calculator which provides for easy large
+numeric calculations, but which also can be easily programmed
+for difficult or long calculations.	 It can accept a command line
+argument, in which case it executes that single command and exits.
 Otherwise, it enters interactive mode.  In this mode, it accepts
 commands one at a time, processes them, and displays the answers.
 In the simplest case, commands are simply expressions which are
@@ -16,7 +19,7 @@ and the calculator will print:
 15
 ```
 
-Calc as the usual collection of arithmetic operators +, -, /, * as
+Calc has the usual collection of arithmetic operators +, -, /, * as
 well as ^ (exponentiation), % (modulus) and // (integer divide).
 For example:
 
@@ -257,4 +260,4 @@ help unexpected
 ```
 
 It contains information about differences between C and calc
-that may surprize C programmers.
+that may surprise C programmers.

blkcpy.c

@@ -1,7 +1,7 @@
 /*
  * blkcpy - general values and related routines used by the calculator
  *
- * Copyright (C) 1999-2007  Landon Curt Noll and Ernest Bowen
+ * Copyright (C) 1999-2007,2021  Landon Curt Noll and Ernest Bowen
  *
  * Primary author:  Landon Curt Noll
  *
@@ -1040,7 +1040,7 @@ copyblk2num(BLOCK *sblk, long ssi, long num, NUMBER *dnum, long dsi,
 	NUMBER *ret;		/* cloned and modified numerator */
 #if CALC_BYTE_ORDER == BIG_ENDIAN
 	HALF *swapped;		/* byte swapped input data */
-	unsigned long halflen;	/* length of the input ounded up to HALFs */
+	unsigned long halflen;	/* length of the input rounded up to HALFs */
 	HALF *h;		/* copy byteswap pointer */
 	unsigned long i;
 #endif

block.c

@@ -1,7 +1,7 @@
 /*
  * block - fixed, dynamic, fifo and circular memory blocks
  *
- * Copyright (C) 1999-2007  Landon Curt Noll and Ernest Bowen
+ * Copyright (C) 1999-2007,2021  Landon Curt Noll and Ernest Bowen
  *
  * Primary author:  Landon Curt Noll
  *
@@ -291,7 +291,7 @@ blkrealloc(BLOCK *blk, int newlen, int newchunk)
 	 * Set the data length
 	 *
 	 * We also know that the new block is not empty since we have
-	 * already dealth with that case above.
+	 * already dealt with that case above.
 	 *
 	 * After this section of code, limit and datalen will be
 	 * correct in terms of the new type.

block.h

@@ -1,7 +1,7 @@
 /*
  * block - fixed, dynamic, fifo and circular memory blocks
  *
- * Copyright (C) 1999-2007,2014  Landon Curt Noll and Ernest Bowen
+ * Copyright (C) 1999-2007,2014,2021  Landon Curt Noll and Ernest Bowen
  *
  * Primary author:  Landon Curt Noll
  *
@@ -55,7 +55,7 @@
  *		blkchunk defaults to BLK_CHUNKSIZE
  *
  *	blkfree(x)
- *		Reduce storage down to 0 octetes.
+ *		Reduce storage down to 0 octets.
  *
  *	size(x)
  *		The length of data stored in the block.
@@ -88,7 +88,7 @@
  *	blkmove(dest, src, length [, dest_offset [, src_offset]])
  *		0 <= length <= blksize(x)
  *		offset's are restricted in value by block type
- *		overlapping moves are handeled correctly
+ *		overlapping moves are handled correctly
  *
  *	blkccpy(dest, src, stopval, length [, dest_offset [, src_offset]])
  *		0 <= length <= blksize(x)
@@ -104,7 +104,7 @@
  *		b = a*k for some integer k >= 1
  *
  *	scatter(src, dest1, dest2 [, dest3 ] ...)
- *		copy sucessive octets from src into dest1, dest2, ...
+ *		copy successive octets from src into dest1, dest2, ...
  *		    restarting with dest1 after end of list
  *		stops at end of src
  *
@@ -184,7 +184,7 @@ EXTERN int blk_debug;	/* 0 => debug off */
 /* length of data stored in a block */
 #define blklen(blk) ((blk)->datalen)
 
-/* block footpint in memory */
+/* block footprint in memory */
 #define blksizeof(blk) ((blk)->maxsize)
 
 /* block allocation chunk size */

byteswap.c

@@ -1,7 +1,7 @@
 /*
  * byteswap - byte swapping routines
  *
- * Copyright (C) 1999  Landon Curt Noll
+ * Copyright (C) 1999,2021  Landon Curt Noll
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -77,7 +77,7 @@ swap_b8_in_HALFs(HALF *dest, HALF *src, LEN len)
  *		  NULL to allocate the storage
  *	src	- pointer to a ZVALUE to swap
  *	all	- TRUE => swap every element, FALSE => swap only the
- *		  multiprecision storage
+ *		  multi-precision storage
  *
  * returns:
  *	pointer to where the swapped src has been put
@@ -145,7 +145,7 @@ swap_b8_in_ZVALUE(ZVALUE *dest, ZVALUE *src, BOOL all)
  *		  NULL to allocate the storage
  *	src	- pointer to a NUMBER to swap
  *	all	- TRUE => swap every element, FALSE => swap only the
- *		  multiprecision storage
+ *		  multi-precision storage
  *
  * returns:
  *	pointer to where the swapped src has been put
@@ -209,7 +209,7 @@ swap_b8_in_NUMBER(NUMBER *dest, NUMBER *src, BOOL all)
  *		  NULL to allocate the storage
  *	src	- pointer to a COMPLEX to swap
  *	all	- TRUE => swap every element, FALSE => swap only the
- *		  multiprecision storage
+ *		  multi-precision storage
  *
  * returns:
  *	pointer to where the swapped src has been put
@@ -313,7 +313,7 @@ swap_b16_in_HALFs(HALF *dest, HALF *src, LEN len)
  *		  NULL to allocate the storage
  *	src	- pointer to a ZVALUE to swap
  *	all	- TRUE => swap every element, FALSE => swap only the
- *		  multiprecision storage
+ *		  multi-precision storage
  *
  * returns:
  *	pointer to where the swapped src has been put
@@ -380,7 +380,7 @@ swap_b16_in_ZVALUE(ZVALUE *dest, ZVALUE *src, BOOL all)
  *		  NULL to allocate the storage
  *	src	- pointer to a NUMBER to swap
  *	all	- TRUE => swap every element, FALSE => swap only the
- *		  multiprecision storage
+ *		  multi-precision storage
  *
  * returns:
  *	pointer to where the swapped src has been put
@@ -444,7 +444,7 @@ swap_b16_in_NUMBER(NUMBER *dest, NUMBER *src, BOOL all)
  *		  NULL to allocate the storage
  *	src	- pointer to a COMPLEX to swap
  *	all	- TRUE => swap every element, FALSE => swap only the
- *		  multiprecision storage
+ *		  multi-precision storage
  *
  * returns:
  *	pointer to where the swapped src has been put
@@ -508,7 +508,7 @@ swap_b16_in_COMPLEX(COMPLEX *dest, COMPLEX *src, BOOL all)
  *		  NULL to allocate the storage
  *	src	- pointer to a ZVALUE to swap
  *	all	- TRUE => swap every element, FALSE => swap only the
- *		  multiprecision storage
+ *		  multi-precision storage
  *
  * returns:
  *	pointer to where the swapped src has been put
@@ -576,7 +576,7 @@ swap_HALF_in_ZVALUE(ZVALUE *dest, ZVALUE *src, BOOL all)
  *		  NULL to allocate the storage
  *	src	- pointer to a NUMBER to swap
  *	all	- TRUE => swap every element, FALSE => swap only the
- *		  multiprecision storage
+ *		  multi-precision storage
  *
  * returns:
  *	pointer to where the swapped src has been put
@@ -640,7 +640,7 @@ swap_HALF_in_NUMBER(NUMBER *dest, NUMBER *src, BOOL all)
  *		  NULL to allocate the storage
  *	src	- pointer to a COMPLEX to swap
  *	all	- TRUE => swap every element, FALSE => swap only the
- *		  multiprecision storage
+ *		  multi-precision storage
  *
  * returns:
  *	pointer to where the swapped src has been put

cal/Makefile

@@ -2,7 +2,7 @@
 #
 # cal - makefile for calc standard resource files
 #
-# Copyright (C) 1999-2006,2017  Landon Curt Noll
+# Copyright (C) 1999-2006,2017,2021  Landon Curt Noll
 #
 # Calc is open software; you can redistribute it and/or modify it under
 # the terms of the version 2.1 of the GNU Lesser General Public License
@@ -181,14 +181,14 @@ FMT= fmt
 
 # The calc files to install
 #
-# This list is prodiced by the detaillist rule when no WARNINGS are detected.
+# This list is produced by the detaillist rule when no WARNINGS are detected.
 #
 # Please use:
 #
 #	make calc_files_list
 #
 # to keep this list in nice sorted order and to check that these
-# deailed help files are under RCS control.
+# detailed help files are under RCS control.
 #
 CALC_FILES= README alg_config.cal beer.cal bernoulli.cal \
 	bernpoly.cal bigprime.cal bindings brentsolve.cal chi.cal chrem.cal \
@@ -236,7 +236,7 @@ all: ${CALC_FILES} ${MAKE_FILE} .all
 # sub-directory called calc/cal.
 #
 # NOTE: Due to bogus shells found on one common system we must have
-#	an non-emoty else clause for every if condition.  *sigh*
+#	an non-empty else clause for every if condition.  *sigh*
 #
 ##
 
@@ -391,7 +391,7 @@ uninstall:
 		if [ -f "${T}${CALC_SHAREDIR}/$$i" ]; then \
 		   echo "cannot uninstall ${T}${CALC_SHAREDIR}/$$i"; \
 		else \
-		   echo "uninstalled ${T}${CALC_SHAREDIR}/$$i"; \
+		   echo "un-installed ${T}${CALC_SHAREDIR}/$$i"; \
 		fi; \
 	    fi; \
 	done

cal/README

@@ -38,43 +38,6 @@ Calc resource file files are provided because they serve as examples of
 how use the calc language, and/or because the authors thought them to
 be useful!
 
-If you write something that you think is useful, please join the
-low volume calc mailing list calc-tester.  Then send your contribution
-to the calc-tester mailing list.
-
-To subscribe to the calc-tester mailing list, visit the following URL:
-
-	https://www.listbox.com/subscribe/?list_id=239342
-
-    To help determine you are a human and not just a spam bot,
-    you will be required to provide the following additional info:
-
-	Your Name
-	Calc Version
-	Operating System
-	The date 7 days ago
-
-    This is a low volume moderated mailing list.
-
-    This mailing list replaces calc-tester at asthe dot com list.
-
-    If you need a human to help you with your mailing list subscription,
-    please send EMail to our special:
-
-	calc-tester-maillist-help at asthe dot com
-
-	NOTE: Remove spaces and replace 'at' with @, 'dot' with .
-
-    address.  To be sure we see your EMail asking for help with your
-    mailing list subscription, please use the following phase in your
-    EMail Subject line:
-
-	calc tester mailing list help
-
-    That phrase in your subject line will help ensure your
-    request will get past our anti-spam filters.  You may have
-    additional words in your subject line.
-
 =-=
 
 By convention, a resource file only defines and/or initializes functions,
@@ -250,12 +213,12 @@ brentsolve.cal
 
     brentsolve(low, high,eps)
 
-    A root-finder implementwed with the Brent-Dekker trick.
+    A root-finder implemented with the Brent-Dekker trick.
 
     brentsolve2(low, high,which,eps)
 
     The second function, brentsolve2(low, high,which,eps) has some lines
-    added to make it easier to hardcode the name of the helper function
+    added to make it easier to hard-code the name of the helper function
     different from the obligatory "f".
 
     See:
@@ -429,7 +392,7 @@ factorial2.cal
 
     bigcatalan(n)
 
-    Calculates the n-th Catalan number for n large. It is usefull
+    Calculates the n-th Catalan number for n large. It is useful
     above n~50,000 but defaults to the builtin function for smaller
     values.Meant as a complete replacement for catalan(n) with only a
     very small overhead.  See:
@@ -470,9 +433,9 @@ factorial2.cal
                       k = 0
 
     The other function stirling2caching(n,m) does it by way of the
-    reccurence relation and keeps all earlier results. This function
+    re-occurrence relation and keeps all earlier results. This function
     is much slower for computing a single value than stirling2(n,m) but
-    is very usefull if many Stirling numbers are needed, for example in
+    is very useful if many Stirling numbers are needed, for example in
     a series.  See:
 
         http://en.wikipedia.org/wiki/Stirling_numbers_of_the_second_kind
@@ -583,7 +546,7 @@ infinities.cal
     pinf()
 
     The symbolic handling of infinities. Needed for intnum.cal but might be
-    usefull elsewhere, too.
+    useful elsewhere, too.
 
 
 intfile.cal
@@ -632,13 +595,13 @@ intnum.cal
     This file offers some methods for numerical integration. Implemented are
     the Gauss-Legendre and the tanh-sinh quadrature.
 
-    All functions are usefull to some extend but the main function for
+    All functions are useful to some extend but the main function for
     quadrature is quad(), which is not much more than an abstraction layer.
 
-    The main workers are quadgl() for Gauss-legendre and quadts() for the
+    The main workers are quadgl() for Gauss-Legendre and quadts() for the
     tanh-sinh quadrature. The limits of the integral can be anything in the
     complex plane and the extended real line. The latter means that infinite
-    limits are supported by way of the smbolic infinities implemented in the
+    limits are supported by way of the symbolic infinities implemented in the
     file infinities.cal (automatically linked in by intnum.cal).
 
     Integration in parts and contour is supported by the "points" argument
@@ -698,7 +661,7 @@ intnum.cal
 
     The quad*core functions do not offer anything fancy but the third parameter
     controls the so called "order" which is just the number of nodes computed.
-    This can be quite usefull in some circumstances.
+    This can be quite useful in some circumstances.
 
         ; quadgldeletenodes()
         ; define f(x){ return exp(x);}
@@ -760,7 +723,7 @@ lambertw.cal
      ProductLog[branch,z] with the tested values.
 
      The series is only valid for the branches 0,-1, real z, converges
-     for values of z _very_ near the branchpoint -exp(-1) only, and must
+     for values of z _very_ near the branch-point -exp(-1) only, and must
      be given the branches explicitly.  See the code in lambertw.cal
      for further information.
 
@@ -783,7 +746,7 @@ lnseries.cal
     does so by computing the prime factorization of all of the number
     sequence 1,2,3...n, calculates the natural logarithms of the primes
     in 1,2,3...n and uses the above factorization to build the natural
-    logarithms of the rest of the sequence by sadding the logarithms of
+    logarithms of the rest of the sequence by adding the logarithms of
     the primes in the factorization.  This is faster for high precision
     of the logarithms and/or long sequences.
 
@@ -843,7 +806,7 @@ mfactor.cal
     at 2*start_k*n+1.  Skips values that are multiples of primes <= p_elim.
     By default, start_k == 1, rept_loop = 10000 and p_elim = 17.
 
-    The p_elim == 17 overhead takes ~3 minutes on an 200 Mhz r4k CPU and
+    The p_elim == 17 overhead takes ~3 minutes on an 200 MHz r4k CPU and
     requires about ~13 Megs of memory.	The p_elim == 13 overhead
     takes about 3 seconds and requires ~1.5 Megs of memory.
 
@@ -1354,7 +1317,7 @@ specialfunctions.cal
 	http://en.wikipedia.org/wiki/Polygamma
         http://dlmf.nist.gov/5
 
-    for information on the n-th derivative ofthe Euler gamma function. This
+    for information on the n-th derivative of the Euler gamma function. This
     function depends on the script zeta2.cal.
 
 
@@ -1371,7 +1334,7 @@ specialfunctions.cal
 
     zeta(s)
 
-    Calculates the value of the Rieman Zeta function at s.  See:
+    Calculates the value of the Riemann Zeta function at s.  See:
 
 	http://en.wikipedia.org/wiki/Riemann_zeta_function
         http://dlmf.nist.gov/25.2
@@ -1390,7 +1353,7 @@ statistics.cal
     invbetainc(x,a,b)
 
     Computes the inverse of the regularized beta function. Does so the
-    brute-force way wich makes it a bit slower.
+    brute-force way which makes it a bit slower.
 
     betapdf(x,a,b)
     betacdf(x,a,b)
@@ -1470,7 +1433,7 @@ sumtimes.cal
     Give the user CPU time for various ways of evaluating sums, sums of
     squares, etc, for large lists and matrices.  N is the size of
     the list or matrix to use.  The doalltimes() function will run
-    all fo the sumtimes tests.  For example:
+    all of the sumtimes tests.  For example:
 
     	doalltimes(1e6);
 
@@ -1816,7 +1779,7 @@ zeta2.cal
     for information on this special zeta function.
 
 
-## Copyright (C) 2000,2014,2017  David I. Bell and Landon Curt Noll
+## Copyright (C) 2000,2014,2017,2021  David I. Bell and Landon Curt Noll
 ##
 ## Primary author: Landon Curt Noll
 ##

cal/alg_config.cal

@@ -1,7 +1,7 @@
 /*
  * alg_config - help determine optimal values for algorithm levels
  *
- * Copyright (C) 2006,2014  Landon Curt Noll
+ * Copyright (C) 2006,2014,2021  Landon Curt Noll
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -33,7 +33,7 @@ static test_time;	/* try for this many seconds in loop test */
  * given:
  *	ratio	the ratio of time between two algorithms
  *
- * retuns:
+ * returns:
  *	1	When ratio is near 1.0
  *	0	otherwise
  *
@@ -354,7 +354,7 @@ define best_mul2()
     local high;		/* high loop value tested */
     local mid;		/* between low and high */
     local best_val;	/* value found with ratio closest to unity */
-    local best_ratio;	/* cloest ratio found to unity */
+    local best_ratio;	/* closest ratio found to unity */
     local expand;	/* how fast to expand the length */
 
     /*
@@ -363,7 +363,7 @@ define best_mul2()
     printf("WARNING: This tool may not be computing the correct best value\n");
     test_time = 5.0;
     printf("The best_mul2() function will take a LONG time to run!\n");
-    printf("It is important that best_mul2() run on an othwewise idle host!\n");
+    printf("It is important that best_mul2() run on an otherwise idle host!\n");
     if (config("user_debug") <= 0) {
 	printf("To monitor progress, set user_debug to 2: "
 	       "config(\"user_debug\", 2)\n");
@@ -392,7 +392,7 @@ define best_mul2()
      */
     do {
 	/*
-	 * determine the paramters of the next ratio test
+	 * determine the parameters of the next ratio test
 	 *
 	 * We will multiplicatively expand our test level until
 	 * the ratio drops below 1.0.
@@ -419,7 +419,7 @@ define best_mul2()
 	    best_val = high;
 	    best_ratio = ratio;
 	    if (config("user_debug") > 1) {
-		printf("    len %d has a new cloest ratio to unity: %.6f\n",
+		printf("    len %d has a new closest ratio to unity: %.6f\n",
 		       best_val, best_ratio);
 	    }
 	}
@@ -442,7 +442,7 @@ define best_mul2()
 	    high /= 2;
 	    low = high / 2;
 	    if (config("user_debug") > 0) {
-		printf("retesting multiply alg1/alg2 ratio for len = %d\n",
+		printf("re-testing multiply alg1/alg2 ratio for len = %d\n",
 		       high);
 	    }
 	    ratio = mul_ratio(high);
@@ -450,7 +450,8 @@ define best_mul2()
 		best_val = high;
 		best_ratio = ratio;
 		if (config("user_debug") > 1) {
-		    printf("    len %d has a new cloest ratio to unity: %.6f\n",
+		    printf("    len %d has a new closest ratio "
+			   "to unity: %.6f\n",
 			   best_val, best_ratio);
 		}
 	    }
@@ -483,7 +484,7 @@ define best_mul2()
 	    best_val = mid;
 	    best_ratio = ratio;
 	    if (config("user_debug") > 1) {
-		printf("    len %d has a new cloest ratio to unity: %.6f\n",
+		printf("    len %d has a new closest ratio to unity: %.6f\n",
 		       best_val, best_ratio);
 	    }
 	}
@@ -535,7 +536,7 @@ define best_mul2()
 	printf("config(\"mul2\", %d),;\n", best_val);
 	printf("WARNING: It is believed that the output "
 	       "of this resource file is bogus!\n");
-	printf("WARNING: You may NOT wish to follow the above suggeston.\n");
+	printf("WARNING: You may NOT wish to follow the above suggestion.\n");
     }
     return mid;
 }
@@ -835,7 +836,7 @@ define best_sq2()
     local high;		/* high loop value tested */
     local mid;		/* between low and high */
     local best_val;	/* value found with ratio closest to unity */
-    local best_ratio;	/* cloest ratio found to unity */
+    local best_ratio;	/* closest ratio found to unity */
     local expand;	/* how fast to expand the length */
 
     /*
@@ -844,7 +845,7 @@ define best_sq2()
     printf("WARNING: This tool may not be computing the correct best value\n");
     test_time = 5.0;
     printf("The best_sq2() function will take a LONG time to run!\n");
-    printf("It is important that best_sq2() run on an othwewise idle host!\n");
+    printf("It is important that best_sq2() run on an otherwise idle host!\n");
     if (config("user_debug") <= 0) {
 	printf("To monitor progress, set user_debug to 2: "
 	       "config(\"user_debug\", 2)\n");
@@ -873,7 +874,7 @@ define best_sq2()
      */
     do {
 	/*
-	 * determine the paramters of the next ratio test
+	 * determine the parameters of the next ratio test
 	 *
 	 * We will multiplicatively expand our test level until
 	 * the ratio drops below 1.0.
@@ -900,7 +901,7 @@ define best_sq2()
 	    best_val = high;
 	    best_ratio = ratio;
 	    if (config("user_debug") > 1) {
-		printf("    len %d has a new cloest ratio to unity: %.6f\n",
+		printf("    len %d has a new closest ratio to unity: %.6f\n",
 		       best_val, best_ratio);
 	    }
 	}
@@ -923,7 +924,7 @@ define best_sq2()
 	    high /= 2;
 	    low = high / 2;
 	    if (config("user_debug") > 0) {
-		printf("retesting multiply alg1/alg2 ratio for len = %d\n",
+		printf("re-testing multiply alg1/alg2 ratio for len = %d\n",
 		       high);
 	    }
 	    ratio = mul_ratio(high);
@@ -931,7 +932,8 @@ define best_sq2()
 		best_val = high;
 		best_ratio = ratio;
 		if (config("user_debug") > 1) {
-		    printf("    len %d has a new cloest ratio to unity: %.6f\n",
+		    printf("    len %d has a new closest ratio "
+			   "to unity: %.6f\n",
 			   best_val, best_ratio);
 		}
 	    }
@@ -964,7 +966,7 @@ define best_sq2()
 	    best_val = mid;
 	    best_ratio = ratio;
 	    if (config("user_debug") > 1) {
-		printf("    len %d has a new cloest ratio to unity: %.6f\n",
+		printf("    len %d has a new closest ratio to unity: %.6f\n",
 		       best_val, best_ratio);
 	    }
 	}
@@ -1017,7 +1019,7 @@ define best_sq2()
 	printf("config(\"sq2\", %d),;\n", best_val);
 	printf("WARNING: It is believed that the output "
 	       "of this resource file is bogus!\n");
-	printf("WARNING: You may NOT wish to follow the above suggeston.\n");
+	printf("WARNING: You may NOT wish to follow the above suggestion.\n");
     }
     return mid;
 }
@@ -1337,7 +1339,7 @@ define best_pow2()
     local high;		/* high loop value tested */
     local mid;		/* between low and high */
     local best_val;	/* value found with ratio closest to unity */
-    local best_ratio;	/* cloest ratio found to unity */
+    local best_ratio;	/* closest ratio found to unity */
     local expand;	/* how fast to expand the length */
     local looped;	/* 1 ==> we have expanded lengths before */
 
@@ -1347,7 +1349,7 @@ define best_pow2()
     printf("WARNING: This tool may not be computing the correct best value\n");
     test_time = 60.0;
     printf("The best_pow2() function will take a LONG time to run!\n");
-    printf("It is important that best_pow2() run on an othwewise idle host!\n");
+    printf("It is important that best_pow2() run on an otherwise idle host!\n");
     if (config("user_debug") <= 0) {
 	printf("To monitor progress, set user_debug to 2: "
 	       "config(\"user_debug\", 2)\n");
@@ -1358,7 +1360,7 @@ define best_pow2()
      * firewall - must have a >1.02 ratio for the initial length
      *
      * We select 1.02 because of the precision of the CPU timing.  We
-     * want to firt move into an area where the 1st algoritm clearly
+     * want to first move into an area where the 1st algorithm clearly
      * dominates.
      */
     low = 4;
@@ -1375,7 +1377,7 @@ define best_pow2()
 	    best_val = high;
 	    best_ratio = ratio;
 	    if (config("user_debug") > 1) {
-		printf("    len %d has a new cloest ratio to unity: %.6f\n",
+		printf("    len %d has a new closest ratio to unity: %.6f\n",
 		       best_val, best_ratio);
 	    }
 	}
@@ -1397,7 +1399,7 @@ define best_pow2()
     looped = 0;
     do {
 	/*
-	 * determine the paramters of the next ratio test
+	 * determine the parameters of the next ratio test
 	 *
 	 * We will multiplicatively expand our test level until
 	 * the ratio drops below 1.0.
@@ -1435,7 +1437,7 @@ define best_pow2()
 	    best_val = high;
 	    best_ratio = ratio;
 	    if (config("user_debug") > 1) {
-		printf("    len %d has a new cloest ratio to unity: %.6f\n",
+		printf("    len %d has a new closest ratio to unity: %.6f\n",
 		       best_val, best_ratio);
 	    }
 	}
@@ -1463,7 +1465,7 @@ define best_pow2()
 	    best_val = mid;
 	    best_ratio = ratio;
 	    if (config("user_debug") > 1) {
-		printf("    len %d has a new cloest ratio to unity: %.6f\n",
+		printf("    len %d has a new closest ratio to unity: %.6f\n",
 		       best_val, best_ratio);
 	    }
 	}
@@ -1516,7 +1518,7 @@ define best_pow2()
 	printf("config(\"pow2\", %d),;\n", best_val);
 	printf("WARNING: It is believed that the output "
 	       "of this resource file is bogus!\n");
-	printf("WARNING: You may NOT wish to follow the above suggeston.\n");
+	printf("WARNING: You may NOT wish to follow the above suggestion.\n");
     }
     return mid;
 }

cal/bernoulli.cal

@@ -1,7 +1,7 @@
 /*
- * bernoulli - clculate the Nth Bernoulli number B(n)
+ * bernoulli - calculate the Nth Bernoulli number B(n)
  *
- * Copyright (C) 2000  David I. Bell and Landon Curt Noll
+ * Copyright (C) 2000,2021  David I. Bell and Landon Curt Noll
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -26,9 +26,9 @@
 /*
  * Calculate the Nth Bernoulli number B(n).
  *
- * NOTE: This is now a bulitin function.
+ * NOTE: This is now a builtin function.
  *
- * The non-buildin code used the following symbolic formula to calculate B(n):
+ * The non-builtin code used the following symbolic formula to calculate B(n):
  *
  *	(b+1)^(n+1) - b^(n+1) = 0
  *
@@ -42,7 +42,7 @@
  *	B(3) = -(6*B(2) + 4*B(1) + 1) / 4
  *
  * The combinatorial factors in the expansion of the above formula are
- * calculated interatively, and we use the fact that B(2i+1) = 0 if i > 0.
+ * calculated interactively, and we use the fact that B(2i+1) = 0 if i > 0.
  * Since all previous B(n)'s are needed to calculate a particular B(n), all
  * values obtained are saved in an array for ease in repeated calculations.
  */

cal/bernpoly.cal

@@ -1,7 +1,7 @@
 /*
- * bernpoly - Bernoully polynomials B_n(z) for arbitrary n,z..
+ * bernpoly - Bernoulli polynomials B_n(z) for arbitrary n,z..
  *
- * Copyright (C) 2013 Christoph Zurnieden
+ * Copyright (C) 2013,2021 Christoph Zurnieden
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License

cal/brentsolve.cal

@@ -1,7 +1,7 @@
 /*
  * brentsolve - Root finding with the Brent-Dekker trick
  *
- * Copyright (C) 2013 Christoph Zurnieden
+ * Copyright (C) 2013,2021 Christoph Zurnieden
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -143,7 +143,7 @@ define brentsolve2(low, high,which,eps){
 
   switch(param(0)){
     case 0:
-    case 1: return newerror("brentsolve2: not enough argments");
+    case 1: return newerror("brentsolve2: not enough arguments");
     case 2: eps = epsilon(epsilon()*1e-2);
             which = 0;break;
     case 3: eps = epsilon(epsilon()*1e-2);break;

cal/chi.cal

@@ -1,7 +1,7 @@
 /*
  * chi - chi^2 probabilities with degrees of freedom for null hypothesis
  *
- * Copyright (C) 2001  Landon Curt Noll
+ * Copyright (C) 2001,2021  Landon Curt Noll
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -51,7 +51,7 @@ define Z(x, eps_term)
 
 
 /*
- * P(x[, eps]) asymtotic P(x) expansion for x>0 to an given epsilon error term
+ * P(x[, eps]) asymptotic P(x) expansion for x>0 to an given epsilon error term
  *
  * NOTE: If eps is omitted, the stored epsilon value is used.
  *
@@ -99,7 +99,7 @@ define P(x, eps_term)
     }
 
     /*
-     * aproximate sum(n=0; n < infinity){x^(2*n+1)/(1*3*5*...(2*n+1)}
+     * approximate sum(n=0; n < infinity){x^(2*n+1)/(1*3*5*...(2*n+1)}
      */
     x2 = x*x;
     x_term = x;
@@ -130,7 +130,7 @@ define P(x, eps_term)
  *
  *    The chi_prob() function does not work well with odd degrees of freedom.
  *    It is reasonable with even degrees of freedom, although one must give
- *    a sifficently small error term as the degress gets large (>100).
+ *    a sufficiently small error term as the degrees gets large (>100).
  *
  * NOTE: This function does not work well with odd degrees of freedom.
  *	 Can somebody help / find a bug / provide a better method of
@@ -186,7 +186,7 @@ define chi_prob(chi_sq, v, eps_term)
     local r;		/* index in finite sum */
     local r_lim;	/* limit value for r */
     local s;		/* sum */
-    local d;		/* demoninator (2*4*6*... or 1*3*5...) */
+    local d;		/* denominator (2*4*6*... or 1*3*5...) */
     local chi_term;	/* chi_sq^r */
     local ret;		/* return value */
 

cal/chrem.cal

@@ -1,7 +1,7 @@
 /*
- * chrem - chinese remainder theorem/problem solver
+ * chrem - Chinese remainder theorem/problem solver
  *
- * Copyright (C) 1999  Ernest Bowen and Landon Curt Noll
+ * Copyright (C) 1999,2021  Ernest Bowen and Landon Curt Noll
  *
  * Primary author:  Ernest Bowen
  *
@@ -26,7 +26,7 @@
  */
 
 /*
- * When possible, chrem finds solutions for x of a set of congruences
+ * When possible, chrem finds solutions for x of a set of congruence
  * of the form:
  *
  *			x = r1 (mod m1)
@@ -35,7 +35,7 @@
  *
  * where the residues r1, r2, ... and the moduli m1, m2, ... are
  * given integers.  The Chinese remainder theorem states that if
- * m1, m2, ... are relatively prime in pairs, the above congruences
+ * m1, m2, ... are relatively prime in pairs, the above congruence
  * have a unique solution modulo  m1 * m2 * ...	  If m1, m2, ...
  * are not relatively prime in pairs, it is possible that no solution
  * exists.  If solutions exist, the general solution is expressible as:

cal/dms.cal

@@ -1,7 +1,7 @@
 /*
  * dms - calculate in degrees, minutes, and seconds (based on deg)
  *
- * Copyright (C) 1999,2010  David I. Bell and Landon Curt Noll
+ * Copyright (C) 1999,2010,2021  David I. Bell and Landon Curt Noll
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -53,7 +53,7 @@ define dms_add(a, b)
 {
     local obj dms ans;		/* return value */
 
-    /* initalize value to 1st arg */
+    /* initialize value to 1st arg */
     if (istype(a, ans)) {
 	/* 1st arg is dms object, load it */
 	ans.deg = a.deg;
@@ -110,7 +110,7 @@ define dms_sub(a, b)
 {
     local obj dms ans;		/* return value */
 
-    /* initalize value to 1st arg */
+    /* initialize value to 1st arg */
     if (istype(a, ans)) {
 	/* 1st arg is dms object, load it */
 	ans.deg = a.deg;
@@ -352,11 +352,11 @@ define fixdms(a)
 	quit "attempt to fix a non dms object";
     }
 
-    /* force minutes to be intergral */
+    /* force minutes to be integral */
     a.min += frac(a.deg) * 60;
     a.deg = int(a.deg);
 
-    /* force degrees to be intergral */
+    /* force degrees to be integral */
     a.sec += frac(a.min) * 60;
     a.min = int(a.min);
 

cal/dotest.cal

@@ -8,8 +8,8 @@
  * copyright this dotest_code.
  *
  * ERNEST BOWEN AND LANDON CURT NOLL DISCLAIMS ALL WARRANTIES WITH REGARD TO
- * THIS	 SOFTWARE,  INCLUDING  ALL IMPLIED WARRANTIES OF MER-
+ * THIS         SOFTWARE,  INCLUDING  ALL IMPLIED WARRANTIES OF MER-
- * CHANTABILITY AND FITNESS.  IN NO EVENT SHALL	 LANDON	 CURT
+ * CHANTABILITY AND FITNESS.  IN NO EVENT SHALL         LANDON  CURT
  * NOLL	 BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
  * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM  LOSS  OF
  * USE,	 DATA  OR  PROFITS, WHETHER IN AN ACTION OF CONTRACT,
@@ -173,7 +173,7 @@ define dotest(dotest_file, dotest_code = 0, dotest_maxcond = -1)
     }
 
     /*
-     * preppare to return to the caller environment
+     * prepare to return to the caller environment
      *
      * We increase the caller's error count by the number
      * of line tests that failed, not the number of internal

cal/factorial2.cal

@@ -1,7 +1,7 @@
 /*
  * factorial2 - implementation of different factorial related functions
  *
- * Copyright (C) 2013 Christoph Zurnieden
+ * Copyright (C) 2013,2021 Christoph Zurnieden
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -281,10 +281,10 @@ define __CZ__multiply_factored_factorial(matrix,stop){
 }
 
 /*
-    Compute binomial coeficients n!/(k!(n-k)!)
+    Compute binomial coefficients n!/(k!(n-k)!)
 
     One of the rare cases where a formula once meant to ease manual computation
-    is actually the (aymptotically) fastest way to do it (in July 2013) for
+    is actually the (asymptotically) fastest way to do it (in July 2013) for
     the extreme case binomial(2N,N) but for a high price, the memory
     needed is pi(N)--theoretically.
 */
@@ -626,7 +626,7 @@ define subfactorialrecursive(n){
   return n * subfactorialrecursive(n-1) + (-1)^n;
 }
 
-/* This is, quite amusingely, faster than the very same algorithm in
+/* This is, quite amusingly, faster than the very same algorithm in
    PARI/GP + GMP*/
 define subfactorialiterative(n){
   local k temp1 temp2 ret;

cal/hms.cal

@@ -1,7 +1,7 @@
 /*
  * hms - calculate in hours, minutes, and seconds
  *
- * Copyright (C) 2010  Landon Curt Noll
+ * Copyright (C) 2010,2021  Landon Curt Noll
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -53,7 +53,7 @@ define hms_add(a, b)
 {
     local obj hms ans;		/* return value */
 
-    /* initalize value to 1st arg */
+    /* initialize value to 1st arg */
     if (istype(a, ans)) {
 	/* 1st arg is hms object, load it */
 	ans.hour = a.hour;
@@ -110,7 +110,7 @@ define hms_sub(a, b)
 {
     local obj hms ans;		/* return value */
 
-    /* initalize value to 1st arg */
+    /* initialize value to 1st arg */
     if (istype(a, ans)) {
 	/* 1st arg is hms object, load it */
 	ans.hour = a.hour;
@@ -352,11 +352,11 @@ define fixhms(a)
 	quit "attempt to fix a non hms object";
     }
 
-    /* force minutes to be intergral */
+    /* force minutes to be integral */
     a.min += frac(a.hour) * 60;
     a.hour = int(a.hour);
 
-    /* force hours to be intergral */
+    /* force hours to be integral */
     a.sec += frac(a.min) * 60;
     a.min = int(a.min);
 

cal/intfile.cal

@@ -1,7 +1,7 @@
 /*
  * intfile - integer to file and file to integer conversion
  *
- * Copyright (C) 2001  Landon Curt Noll
+ * Copyright (C) 2001,2021  Landon Curt Noll
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -27,20 +27,20 @@
 
 /*
  * NOTE: Because leading HALF values are trimmed from integer, a file
- *	 that begins with lots of 0 bits (in the case of big endian)
+ *	 that begins with lots of 0 bits (in the case of big Endian)
- *	 or that ends with lots of 0 bits (in the case of little endian)
+ *	 or that ends with lots of 0 bits (in the case of little Endian)
  *	 will be changed when the subsequent integer is written back.
  */
 
 
 /*
- * file2be - convert a file into an big endian integer
+ * file2be - convert a file into an big Endian integer
  *
  * given:
  *	filename	filename to read
  *
  * returns:
- *	integer read from its contents on big endian order
+ *	integer read from its contents on big Endian order
  */
 define file2be(filename)
 {
@@ -75,13 +75,13 @@ define file2be(filename)
 
 
 /*
- * file2le - convert a file into an little endian integer
+ * file2le - convert a file into an little Endian integer
  *
  * given:
  *	filename	filename to read
  *
  * returns:
- *	integer read from its contents on little endian order
+ *	integer read from its contents on little Endian order
  */
 define file2le(filename)
 {
@@ -118,7 +118,7 @@ define file2le(filename)
 
 
 /*
- * be2file - convert a big endian integer into a file
+ * be2file - convert a big Endian integer into a file
  *
  * given:
  *	v		integer to write to the file
@@ -168,7 +168,7 @@ define be2file(v, filename)
 
 
 /*
- * le2file - convert a little endian integer into a file
+ * le2file - convert a little Endian integer into a file
  *
  * given:
  *	v		integer to write to the file

cal/intnum.cal

@@ -1,7 +1,7 @@
 /*
  * intnum - implementation of tanhsinh- and Gauss-Legendre quadrature
  *
- * Copyright (C) 2013 Christoph Zurnieden
+ * Copyright (C) 2013,2021 Christoph Zurnieden
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -295,7 +295,7 @@ define quadts(a, b, points)
                  * as the number of equally spaced intervals on a straight line
                  * connecting a and b. Computing the segments here is a bit
                  * more complicated but not much, it should have been taught in
-                 * highschool.
+                 * high school.
 		 * Other contours by way of a list of points */
 		slope = (im(b) - im(a)) / (re(b) - re(a));
 		C = (im(a) + slope) * re(a);

cal/lambertw.cal

@@ -1,7 +1,7 @@
 /*
  * lambertw - Lambert's W-function
  *
- * Copyright (C) 2013 Christoph Zurnieden
+ * Copyright (C) 2013,2021 Christoph Zurnieden
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -83,7 +83,7 @@ define __CZ__lambertw_m1(z,eps){
   or by using the function lambertw_series_print() after running
   lambertw_series(z,eps,branch,terms) at least once with the wanted number of
   terms and z = 1 (which might throw an error because the series will not
-  converge in anybodies lifetime for something that far from the branchpoint).
+  converge in anybodies lifetime for something that far from the branch point).
 
 
 */
@@ -105,7 +105,7 @@ define lambertw_series_print(){
 }
 
 /*
-   The series is fast but only if _very_ close to the branchpoint
+   The series is fast but only if _very_ close to the branch point
    The exact branch must be given explicitly, e.g.:
 
 ; lambertw(-exp(-1)+.001)-lambertw_series(-exp(-1)+.001,epsilon()*1e-10,0)

cal/linear.cal

@@ -1,7 +1,7 @@
 /*
  * linear - perform a simple two point 2D linear interpolation
  *
- * Copyright (C) 2005-2007  Landon Curt Noll
+ * Copyright (C) 2005-2007,2021  Landon Curt Noll
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -29,7 +29,7 @@
  *
  * given:
  *	x0, y0		first known point on the line
- *	x1, y1		second knonw point on the line
+ *	x1, y1		second known point on the line
  *	x		a given point to interpolate on
  *
  * returns:

cal/lucas.cal

@@ -1,7 +1,7 @@
 /*
  * lucas - perform a Lucas primality test on h*2^n-1
  *
- * Copyright (C) 1999,2017  Landon Curt Noll
+ * Copyright (C) 1999,2017,2018,2021  Landon Curt Noll
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -373,41 +373,53 @@ lucas(h, n)
 		return 1;		/* 239 is prime */
 	}
 
+	/*
+	 * Verify that h*2^n-1 is not a multiple of 3
+	 *
+	 * The case for h*2^n-1 == 3 is handled above.
+	 */
+	if (((h % 3 == 1) && (n % 2 == 0)) || ((h % 3 == 2) && (n % 2 == 1))) {
+		/* no need to test h*2^n-1, it is a multiple of 3 */
+		ldebug("lucas","not-prime: != 3 and is a multiple of 3");
+		return 0;
+	}
+
 	/*
 	 * Avoid any numbers divisible by small primes
 	 */
 	/*
-	 * check for 3 <= prime factors < 29
+	 * check for 5 <= prime factors < 31
-	 * pfact(28)/2 = 111546435
+	 * pfact(30)/6 = 1078282205
 	 */
 	testval = h*2^n - 1;
-	if (gcd(testval, 111546435) > 1) {
+	if (gcd(testval, 1078282205) > 1) {
-		/* a small 3 <= prime < 29 divides h*2^n-1 */
+		/* a small 5 <= prime < 31 divides h*2^n-1 */
-		ldebug("lucas","not-prime: 3<=prime<29 divides h*2^n-1");
+		ldebug("lucas",\
+		    "not-prime: a small 5<=prime<31 divides h*2^n-1");
 		return 0;
 	}
 	/*
-	 * check for 29 <= prime factors < 47
+	 * check for 31 <= prime factors < 53
-	 * pfact(46)/pfact(28) = 5864229
+	 * pfact(52)/pfact(30) = 95041567
 	 */
-	if (gcd(testval, 58642669) > 1) {
+	if (gcd(testval, 95041567) > 1) {
-		/* a small 29 <= prime < 47 divides h*2^n-1 */
+		/* a small 31 <= prime < 53 divides h*2^n-1 */
-		ldebug("lucas","not-prime: 29<=prime<47 divides h*2^n-1");
+		ldebug("lucas","not-prime: 31<=prime<53 divides h*2^n-1");
 		return 0;
 	}
 	/*
-	 * check for prime 47 <= factors < 257, if h*2^n-1 is large
+	 * check for prime 53 <= factors < 257, if h*2^n-1 is large
-	 * 2^282 > pfact(256)/pfact(46) > 2^281
+	 * 2^276 > pfact(256)/pfact(52) > 2^275
 	 */
 	bits = highbit(testval);
-	if (bits >= 281) {
+	if (bits >= 275) {
 		if (pprod256 <= 0) {
-			pprod256 = pfact(256)/pfact(46);
+			pprod256 = pfact(256)/pfact(52);
 		}
 		if (gcd(testval, pprod256) > 1) {
-			/* a small 47 <= prime < 257 divides h*2^n-1 */
+			/* a small 53 <= prime < 257 divides h*2^n-1 */
 			ldebug("lucas",\
-			    "not-prime: 47<=prime<257 divides h*2^n-1");
+			    "not-prime: 53<=prime<257 divides h*2^n-1");
 			return 0;
 		}
 	}
@@ -423,7 +435,9 @@ lucas(h, n)
 	 * generate a test for h*2^n-1.	 The legacy function,
 	 * legacy_gen_v1() used by the Amdahl 6 could have returned
 	 * -1. The new gen_v1() based on the method outlined in Ref4
-	 * will never return -1.
+	 * will never return -1 if h*2^n-1 is not a multiple of 3.
+	 * Because the "multiple of 3" case is handled above, the
+	 * call below to gen_v1() will never return -1.
 	 */
 	v1 = gen_v1(h, n);
 	if (v1 < 0) {
@@ -933,7 +947,7 @@ rodseth_xhn(x, h, n)
  *
  * Without Jacobi symbol value caching, it requires on average
  * 4.851377 Jacobi symbol evaluations.  With Jacobi symbol value caching
- * cacheing, an averare of 4.348820 Jacobi symbol evaluations is needed.
+ * cacheing, an average of 4.348820 Jacobi symbol evaluations is needed.
  *
  * Given this information, when odd h is a multiple of 3 we try, in order,
  * these odd values of X:
@@ -947,7 +961,7 @@ rodseth_xhn(x, h, n)
  *      jacobi(X-2, h*2^n-1) == 1
  *      jacobi(X+2, h*2^n-1) == -1
  *
- * Less than 1 case out of 1000000 will not be satisifed by the above list.
+ * Less than 1 case out of 1000000 will not be satisfied by the above list.
  * If no value in that list works, we start simple search starting with X = 167
  * and incrementing by 2 until a value of X is found.
  *
@@ -1035,7 +1049,7 @@ next_x = 167;	/* must be 2 more than the largest value in x_tbl[] */
  *	else
  *	    v(1) = 4
  *
- * HOTE: The above "if then else" works only of h is not a multiple of 3.
+ * NOTE: The above "if then else" works only of h is not a multiple of 3.
  *
  ***
  *
@@ -1172,6 +1186,26 @@ gen_v1(h, n)
 		return -1;
 	}
 
+	/*
+	 * Common Mersenne number case:
+	 *
+	 * For Mersenne numbers:
+	 *
+	 *	2^n-1
+	 *
+	 * we can use, 40% of the time, v(1) == 3.  However nearly all code that
+	 * implements the Lucas-Lehmer test uses v(1) == 4.  Whenever for
+	 * h != 0 mod 3, and particular the Mersenne number case of when h == 1:
+	 *
+	 *	1*2^n-1
+	 *
+	 * v(1) == 4 always works.  For this reason, we return 4 when h == 1.
+	 */
+	if (h == 1) {
+		/* v(1) == 4 always works for the Mersenne number case */
+		return 4;
+	}
+
 	/*
 	 * check for Case 1:      (h mod 3 != 0)
 	 */
@@ -1200,10 +1234,10 @@ gen_v1(h, n)
 	 *	jacobi(X-2, h*2^n-1) == 1		part 1
 	 *	jacobi(X+2, h*2^n-1) == -1		part 2
 	 *
-	 * NOTE: If we wanted to be super optimial, we would cache
+	 * NOTE: If we wanted to be super optimal, we would cache
 	 *	 jacobi(X+2, h*2^n-1) that that when we increment X
 	 *	 to the next odd value, the now jacobi(X-2, h*2^n-1)
-	 *	 does not need to be re-evaluted.
+	 *	 does not need to be re-evaluated.
 	 */
 	testval = h*2^n-1;
 	for (i=0; i < x_tbl_len; ++i) {
@@ -1251,7 +1285,7 @@ gen_v1(h, n)
 	/*
 	 * We are in that rare case (less than 1 in 1 000 000) where none of the
 	 * common X values satisfy Ref4 condition 1.  We start a linear search
-	 * of odd vules at next_x from here on.
+	 * of odd values at next_x from here on.
 	 */
 	x = next_x;
 	while (rodseth_xhn(x, h, n) != 1) {

cal/lucas_chk.cal

@@ -1,7 +1,7 @@
 /*
  * lucas_chk - test all primes of the form h*2^n-1, 1<=h<200 and n <= high_n
  *
- * Copyright (C) 1999  Landon Curt Noll
+ * Copyright (C) 1999,2021  Landon Curt Noll
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -303,7 +303,7 @@ read -once "lucas.cal";
  *	[quiet] if given and != 0, then do not print individual test results
  *
  * returns:
- *	1	all is ok
+ *	1	all is OK
  *	0	something went wrong
  */
 define

cal/mfactor.cal

@@ -1,7 +1,7 @@
 /*
  * mfactor - return the lowest factor of 2^n-1, for n > 0
  *
- * Copyright (C) 1999  Landon Curt Noll
+ * Copyright (C) 1999,2021  Landon Curt Noll
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -79,7 +79,7 @@
  *		hindx = 0;
  *	} while (test_factor < some_limit);
  *
- * The test, mfactor(67, 1, 10000) took on an 200 Mhz r4k (user CPU seconds):
+ * The test, mfactor(67, 1, 10000) took on an 200 MHz r4k (user CPU seconds):
  *
  *	210.83	(prior to use of hset[])
  *	 78.35	(hset[] for p_elim = 7)
@@ -99,7 +99,7 @@
  *	 57.78	(hset[] for p_elim = 17)
  *	 p_elim == 19 rejected because of memory size
  *
- * The p_elim == 17 overhead takes ~3 minutes on an 200 Mhz r4k CPU and
+ * The p_elim == 17 overhead takes ~3 minutes on an 200 MHz r4k CPU and
  * requires about ~13 Megs of memory.  The p_elim == 13 overhead
  * takes about 3 seconds and requires ~1.5 Megs of memory.
  *
@@ -256,7 +256,7 @@ define mfactor(n, start_k, rept_loop, p_elim)
 		return q;
 	} else {
 		/* report this loop */
-		printf("at 2*%d*%d+1, cpu: %f\n",
+		printf("at 2*%d*%d+1, CPU: %f\n",
 			(q-1)/(2*n), n, usertime());
 		fflush(files(1));
 		loop = 0;
@@ -269,14 +269,14 @@ define mfactor(n, start_k, rept_loop, p_elim)
 		 */
 		if (rept_loop <= ++loop) {
 			/* report this loop */
-			printf("at 2*%d*%d+1, cpu: %f\n",
+			printf("at 2*%d*%d+1, CPU: %f\n",
 				(q-1)/(2*n), n, usertime());
 			fflush(files(1));
 			loop = 0;
 		}
 
 		/*
-		 * skip if divisable by a prime <= 449
+		 * skip if divisible by a prime <= 449
 		 *
 		 * The value 281 was determined by timing loops
 		 * which found that 281 was at or near the
@@ -285,7 +285,7 @@ define mfactor(n, start_k, rept_loop, p_elim)
 		 * The addition of the do { ... } while (factor(q, 449)>1);
 		 * loop reduced the factoring loop time (36504 k values with
 		 * the hset[] initialization time removed) from 25.69 sec to
-		 * 15.62 sec of CPU time on a 200Mhz r4k.
+		 * 15.62 sec of CPU time on a 200MHz r4k.
 		 */
 		do {
 			/*

cal/natnumset.cal

@@ -1,7 +1,7 @@
 /*
  * natnumset - functions for sets of natural numbers not exceeding a fixed bound
  *
- * Copyright (C) 1999  Ernest Bowen
+ * Copyright (C) 1999,2021  Ernest Bowen
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -76,7 +76,7 @@
  *	A \ B = set difference, integers in A but not in B
  *
  *	~A	= complement of A, integers not in A
- *	#A	= number ofintegers in A
+ *	#A	= number of integers in A
  *	!A	= 1 or 0 according as A is empty or not empty
  *	+A	= sum of the members of A
  *
@@ -100,7 +100,7 @@
  *	A >= B = (B <= A)
  *	A > B = (B < A)
  *
- * Expresssions may be formed from the above "arithmetic" operations in
+ * Expressions may be formed from the above "arithmetic" operations in
  * the usual way, with parentheses for variations from the usual precedence
  * rules.  For example
  *

cal/pell.cal

@@ -1,7 +1,7 @@
 /*
  * pell - solve Pell's equation
  *
- * Copyright (C) 1999  David I. Bell
+ * Copyright (C) 1999,2021  David I. Bell
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -25,7 +25,7 @@
 
 /*
  * Solve Pell's equation; Returns the solution X to: X^2 - D * Y^2 = 1.
- * Type the solution to pells equation for a particular D.
+ * Type the solution to Pell's equation for a particular D.
  */
 
 

cal/poly.cal

@@ -1,7 +1,7 @@
 /*
  * poly - calculate with polynomials of one variable
  *
- * Copyright (C) 1999  Ernest Bowen
+ * Copyright (C) 1999,2021  Ernest Bowen
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -35,7 +35,7 @@
  *	variable has only one name.  For some purposes, a name like
  *	"sin(t)" or "(a + b)" or "\lambda" might be useful;
  *	names like "*" or "-27" are legal but might give expressions
- *	that are difficult to intepret.
+ *	that are difficult to interpret.
  *
  * Polynomial expressions may be constructed from numbers and the
  *	independent variable and other polynomials by the algebraic
@@ -43,7 +43,7 @@
  *	The operations // and % are defined to have the quotient and
  *	remainder meanings as usually defined for polynomials.
  *
- * When polynomials are assigned to idenfifiers, it is convenient to
+ * When polynomials are assigned to identifiers, it is convenient to
  *	think of the polynomials as values.  For example, p = (x - 1)^2
  *	assigns to p a polynomial value in the same way as q = (7 - 1)^2
  *	would assign to q a number value.  As with number expressions

cal/prompt.cal

@@ -1,7 +1,7 @@
 /*
- * prompt - eemonstration of some uses of prompt() and eval()
+ * prompt - demonstration of some uses of prompt() and eval()
  *
- * Copyright (C) 1999  Ernest Bowen
+ * Copyright (C) 1999,2021  Ernest Bowen
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -61,9 +61,9 @@
  * nothing to sum.  The last line returns the value 3, i.e. the last
  * non-null value found for the expressions separated by semicolons,
  * so sum will be increased by 3 after the "print sum^2;" command
- * is executed.	 xxx The terminating semicolon is essential in the
+ * is executed.	 XXX The terminating semicolon is essential in the
  * last two lines.  A command like eval("print 7;") is acceptable to
- * calc but eval("print 7") causes an exit from calc. xxx)
+ * calc but eval("print 7") causes an exit from calc. XXX)
  *
  * If the value returned is not a number (e.g. the name of a list or matrix,
  * or if the string has syntax errors as in "2 + ", in which case the
@@ -75,7 +75,7 @@
  *	"sin(x)", "x^2 + 3*x", "exp(x, 1e-5)".
  *
  * Values of the function so defined are returned for values of x
- * entered in reponse to the ? prompt.	Operation is terminated by
+ * entered in response to the ? prompt.	Operation is terminated by
  * entering "end", "exit" or "quit".
  */
 

cal/quat.cal

@@ -1,7 +1,7 @@
 /*
- * quat - alculate using quaternions of the form: a + bi + cj + dk
+ * quat - calculate using quaternions of the form: a + bi + cj + dk
  *
- * Copyright (C) 1999  David I. Bell
+ * Copyright (C) 1999,2021  David I. Bell
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License

cal/randmprime.cal

@@ -1,7 +1,7 @@
 /*
  * randmprime - generate a random prime of the form h*2^n-1
  *
- * Copyright (C) 1999  Landon Curt Noll
+ * Copyright (C) 1999,2021  Landon Curt Noll
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -45,9 +45,9 @@ randmprime(bits, seed, dbg)
     local n;		/* n as in h*2^n-1 */
     local h;		/* h as in h*2^n-1 */
     local plush;	/* value added to h since the beginning */
-    local init;		/* initial cpu time */
+    local init;		/* initial CPU time */
-    local start;	/* cpu time before last test */
+    local start;	/* CPU time before last test */
-    local stop;		/* cpu time afte last test */
+    local stop;		/* CPU time after last test */
     local tmp;		/* just a tmp place holder value */
     local ret;		/* h*2^n-1 that is prime */
 

cal/regress.cal

@@ -1,7 +1,7 @@
 /*
  * regress - calc regression and correctness test suite
  *
- * Copyright (C) 1999-2017  David I. Bell and Landon Curt Noll
+ * Copyright (C) 1999-2017,2021  David I. Bell and Landon Curt Noll
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -43,7 +43,7 @@ global prob;				/* libregress.cal problem counter */
 prob = 0;				/* clear problem counter */
 
 errcount(0),;				/* clear error count */
-errmax(-1),;				/* prevent errcount from abouting */
+errmax(-1),;				/* prevent errcount from aborting */
 
 global ecnt;				/* expected value of errcount() */
 ecnt = 0;				/* clear expected errcount() value */
@@ -356,8 +356,18 @@ define test_arithmetic()
 	vrfy(-16^-2 == -1/256,	'447: -16^-2 == -1/256');
 	vrfy(-7^2 == -49,	'448: -7^2 == -49');
 	vrfy(-3! == -6,		'449: -3! == -6');
+	vrfy(0^(0-0) == 1,	'450: 0^(0-0) == 1');
+	vrfy(0^(2-2) == 1,	'451: 0^(2-2) == 1');
+	vrfy(2^0 == 1,		'452: 2^0 == 1');
+	vrfy(2^(0-0) == 1,	'453: 2^(0-0) == 1');
+	vrfy(2^(2-2) == 1,	'454: 2^(2-2) == 1');
+	vrfy((2^23209-1)^0 == 1,	'455: (2^23209-1)^0 == 1');
+	vrfy((2^23209-1)^(0-0) == 1,	'456: (2^23209-1)^(0-0) == 1');
+	vrfy((2^23209-1)^(2-2) == 1,	'457: (2^23209-1)^(2-2) == 1');
+	vrfy((2^23209-1)^((2^23209-1)-(2^23209-1)) == 1,
+			'458: (2^23209-1)^((2^23209-1)-(2^23209-1)) == 1');
 
-	print '450: Ending test_arithmetic';
+	print '459: Ending test_arithmetic';
 }
 print '009: parsed test_arithmetic()';
 
@@ -453,7 +463,7 @@ define test_config()
 					'539: config("more", ">> ") == ";; "');
 	vrfy(config("all") == oldcfg,	'540: config("all") == oldcfg');
 
-	/* restore the configation at the start of this function */
+	/* restore the configuration at the start of this function */
 	vrfy(config("all",callcfg) == oldcfg,
 					'541: config("all",callcfg) == oldcfg');
 
@@ -3156,7 +3166,7 @@ print '047: parsed test_poly()';
 
 
 /*
- * test_det - more determinent testing
+ * test_det - more determinant testing
  */
 read -once "test3300";
 print '048: read -once test3300';
@@ -3227,9 +3237,9 @@ define test_error()
 
 	print '3600: Beginning test_error';
 
-	/* bump ecnt up by 148 */
+	/* bump ecnt up by 156 */
-	ecnt += 148;
+	ecnt += 156;
-	print				'3601: ecnt += 148';
+	print				'3601: ecnt += 156';
 
 	strx = "x";
 	print				'3602: strx = "x"';
@@ -3418,11 +3428,15 @@ define test_error()
 	n = 8191;
 	print				'3727: n = 8191';
 	/* test 3728 removed due to non-portable strerror() output */
+	vrfy(tan(2e9i) == error(10435),	'3729: tan(2e9i) == error(10435)');
+	vrfy(cot(2e9i) == error(10437),	'3730: cot(2e9i) == error(10437)');
+	vrfy(sec(2e9i) == error(10439),	'3731: sec(2e9i) == error(10439)');
+	vrfy(csc(2e9i) == error(10440),	'3732: csc(2e9i) == error(10440)');
 
 	/* errmax and errcount should be bumped up the 148 errors above */
-	vrfy(errcount() == ecnt,	'3729: errcount() == ecnt');
+	vrfy(errcount() == ecnt,	'3733: errcount() == ecnt');
 
-	print '3730: Ending test_error';
+	print '3734: Ending test_error';
 }
 print '054: parsed test_error()';
 
@@ -3469,7 +3483,7 @@ print '065: parsed test_param()';
 
 
 /*
- * test_noarg - test missing argment functionality
+ * test_noarg - test missing argument functionality
  */
 define test_noarg()
 {
@@ -4102,38 +4116,46 @@ define test_strprintf()
 			'4821: strprintf("%b", 27/29) == "0b11011/0b11101"');
 	vrfy(strprintf("%e", 12345) == "~1.23e4",
 			'4822: strprintf("%e", 12345) == "~1.23e4"');
+	vrfy(strprintf("%g", .385) == "~.38",
+			'4823: strprintf("%g", .385) == "~.38"');
+	vrfy(strprintf("%g", 385) == "~3.8e2",
+			'4824: strprintf("%g", 385) == "~3.8e2"');
 
 	/* mode tests with tilde == 0 */
 	c = config("tilde", 0);
-	print		'4823: c = config("tilde", 0)';
+	print		'4825: c = config("tilde", 0)';
 	vrfy(strprintf("%e", 12345) == "1.23e4",
-			'4824: strprintf("%e", 12345) == "1.23e4"');
+			'4826: strprintf("%e", 12345) == "1.23e4"');
 	vrfy(strprintf("%.3e", 12345) == "1.234e4",
-			'4825: strprintf("%.3e", 12345) == "1.234e4"');
+			'4827: strprintf("%.3e", 12345) == "1.234e4"');
 	vrfy(strprintf("%e", .00012345) == "1.23e-4",
-			'4826: strprintf("%e", .00012345) == "1.23e-4"');
+			'4828: strprintf("%e", .00012345) == "1.23e-4"');
 	vrfy(strprintf("%d %d", 27) == "27 ",
-			'4827: strprintf("%d %d", 27) == "27 "');
+			'4829: strprintf("%d %d", 27) == "27 "');
 	vrfy(strprintf("%d", 27, 29) == "27",
-			'4828: strprintf("%d", 27, 29) == "27"');
+			'4830: strprintf("%d", 27, 29) == "27"');
 	vrfy(strprintf("%r = %f", 27/29, 27/29) == "27/29 = .93",
-		'4829: strprintf("%r = %f", 27/29, 27/29) == "27/29 = .93"');
+		'4831: strprintf("%r = %f", 27/29, 27/29) == "27/29 = .93"');
 	vrfy(strprintf("%s", "abc") == "abc",
-		'4830: strprintf("%s", "abc") == "abc"');
+		'4832: strprintf("%s", "abc") == "abc"');
 	vrfy(strprintf("%f", "abc") == "abc",
-		'4831: strprintf("%f", "abc") == "abc"');
+		'4833: strprintf("%f", "abc") == "abc"');
 	vrfy(strprintf("%e", "abc") == "abc",
-		'4832: strprintf("%e", "abc") == "abc"');
+		'4834: strprintf("%e", "abc") == "abc"');
 	vrfy(strprintf("%5s", "abc") == "  abc",
-		'4833: strprintf("%5s", "abc") == "  abc"');
+		'4835: strprintf("%5s", "abc") == "  abc"');
 	vrfy(strprintf("%-5s", "abc") == "abc  ",
-		'4834: strprintf("%-5s", "abc") == "abc	 "');
+		'4836: strprintf("%-5s", "abc") == "abc	 "');
+	vrfy(strprintf("%g", .385) == ".38",
+			'4837: strprintf("%g", .385) == ".38"');
+	vrfy(strprintf("%g", 385) == "3.8e2",
+			'4838: strprintf("%g", 385) == "3.8e2"');
 
 	/* restore config */
 	c = config("all", callcfg);
-	print				    '4835: c = config("all", callcfg)';
+	print				    '4839: c = config("all", callcfg)';
 
-	print '4836: Ending test_strprintf';
+	print '4840: Ending test_strprintf';
 }
 print '088: parsed test_fileop()';
 
@@ -5171,7 +5193,7 @@ define test_size()
 			'5715: sizeof(17^139 + 674)*2 == sizeof(q)');
 
 	/*
-	 * recipricals are the same size of their integer inverses
+	 * reciprocals are the same size of their integer inverses
 	 */
 	q = 1/13;
 	print				  '5716: q = 1/13';
@@ -5249,7 +5271,7 @@ define test_size()
 
 	/*
 	 * size of a matrix is the sum of the sizes of the elements
-	 * sizeof of a matrix is the sum of the sizeofs of the elements
+	 * sizeof of a matrix is the sum of the sizeof's of the elements
 	 */
 	mat m[] = {z,q,c};
 	print				  '5752: mat m[] = {z,q,c}';
@@ -5369,7 +5391,7 @@ define test_is()
 {
 	local loc;	/* unassigned local variable */
 	local a;	/* assoc */
-	local ofd;	/* open file desriptor */
+	local ofd;	/* open file descriptor */
 	local cfd;	/* closed file descriptor */
 	local blk;	/* unnamed block */
 	local nblk;	/* named block */
@@ -5386,7 +5408,7 @@ define test_is()
 	local object;	/* object */
 	local rand;	/* rand seed */
 	local random;	/* random seed */
-	local real;	/* real non-intger value */
+	local real;	/* real non-integer value */
 	local prime;	/* odd prime */
 	local square;	/* square of an odd prime */
 	local string;	/* string */
@@ -7470,7 +7492,7 @@ print '190: parsed test_somenew()';
 
 
 /*
- * test_exponentiation - test new exponentiation functionaltiy
+ * test_exponentiation - test new exponentiation functionality
  */
 define test_exponentiation()
 {
@@ -7561,7 +7583,7 @@ define test_quit()
 	quit;
 	prob('quit did not end the test_quit() function');
 
-	/* 8400 serise continued after return, do not print end here */
+	/* 8400 series continued after return, do not print end here */
 }
 print '191: parsed test_quit()';
 
@@ -7862,7 +7884,7 @@ print	'8406: Ending test_quit';
 
 
 /*
- * test_divmod - psuedo-random tests on the // and % with various rounding modes
+ * test_divmod - pseudo-random tests on the // and % with various rounding modes
  */
 print;
 print '8500: Starting test of divmod'
@@ -7888,7 +7910,7 @@ vrfy(config("redecl_warn",0),	  '8651: config("redecl_warn",0)');
 vrfy(config("dupvar_warn",0),	  '8652: config("dupvar_warn",0)');
 vrfy(u_glob == 6,		  '8653: u_glob == 6');
 global u_glob = 555;
-print 				  '8654: reclare u_glob';
+print 				  '8654: declare u_glob';
 vrfy(u_glob == 555,		  '8655: u_glob == 555');
 define func_8650(u_glob) { local u_glob; return u_glob; }
 print				  '8656: u_glob as both local and parameter';
@@ -7916,7 +7938,7 @@ vrfy(dotest("set8700.line", 8703) == 0,
 
 
 /*
- * new exponentiation functionaltiy
+ * new exponentiation functionality
  */
 print;
 return test_exponentiation();
@@ -7932,8 +7954,8 @@ print '8901: read -once "test8900"';
 read -once "test8900";
 print '8902: about to run test8900(1,,8903)';
 testnum = test8900(1,,8903);
-print '8999: ecnt = 203;'
+print '8999: ecnt = 211;'
-ecnt = 203;
+ecnt = 211;
 /* 89xx: test calc resource functions by Christoph Zurnieden */
 
 
@@ -8062,7 +8084,7 @@ return test_functions2();
  *
  *	beer.cal	- prints a bunch of things when loaded
  *	hello.cal	- designed to go into an infinite loop
- *	lucal.cal	- already read by this file
+ *	lucas.cal	- already read by this file
  *	lucas_chk.cal	- already read by this file
  *	regress.cal	- this file
  *	surd.cal	- already read by this file

cal/specialfunctions.cal

@@ -1,7 +1,7 @@
 /*
  * specialfunctions - special functions (e.g.: gamma, zeta, psi)
  *
- * Copyright (C) 2013 Christoph Zurnieden
+ * Copyright (C) 2013,2021 Christoph Zurnieden
  *
  * Calc is open software; you can redistribute it and/or modify
  * it under the terms of the version 2.1 of the GNU Lesser General Public
@@ -442,8 +442,8 @@ define lngamma(z)
 			if (tmp2 < tmp) {
 			    return
 				newerror(strcat
-					 ("lngamma(1): something happend that ",
+					 ("lngamma(1): something happened ",
-					  "should not have happend"));
+					  "that shouldn't have happened"));
 			}
 		    }
 		}
@@ -519,8 +519,8 @@ define lngamma(z)
 			    if (tmp2 < tmp) {
 				return
 				    newerror(strcat
-					     ("lngamma(1): something happend ",
+					     ("lngamma(1): something happened ",
-					      "that should not have happend"));
+					      "that should not have happened"));
 			    }
 			}
 		    }
@@ -576,8 +576,8 @@ define lngamma(z)
 			    if (tmp2 < tmp) {
 				return
 				    newerror(strcat
-					     ("lngamma(1): something happend ",
+					     ("lngamma(1): something happened ",
-					      "that should not have happend"));
+					      "that should not have happened"));
 			    }
 			}
 		    }
@@ -1047,7 +1047,7 @@ define __CZ__ibeta_cf_var_dm(a, b, z, max)
 	}
     }
     if (m > max) {
-	return newerror("ibeta: continous fraction does not converge");
+	return newerror("ibeta: continuous fraction does not converge");
     }
     return f;
 }
@@ -1290,7 +1290,7 @@ define __CZ__erfinvapprox(x)
 	     - (2 / (pi() * a) + (ln(1 - x ^ 2)) / 2));
 }
 
-/* complementary inverse errror function, faster at about x < 1-.91
+/* complementary inverse error function, faster at about x < 1-.91
    Henry E. Fettis. "A stable algorithm for computing the inverse error function
    in the 'tail-end' region" Math. Comp., 28:585-587, 1974.
 */
@@ -1324,7 +1324,7 @@ define __CZ__fettiscf(y, n)
     return t / (1 + r);
 }
 
-/* inverse errror function, faster at about x<=.91*/
+/* inverse error function, faster at about x<=.91*/
 define __CZ__inverfbin(x)
 {
     local places approx flow fhigh eps high low mid fmid epsilon;
@@ -1370,7 +1370,7 @@ define erfinv(x)
 	x = -x;
 	flag = 1;
     }
-    /* No need for full pecision */
+    /* No need for full precision */
     eps = epsilon(1e-20);
     if (eps >= 1e-40) {
 	/* Winitzki, Sergei (6 February 2008). "A handy approximation for the

cal/statistics.cal

@@ -1,7 +1,7 @@
 /*
  * statistics - Some assorted statistics functions.
  *
- * Copyright (C) 2013 Christoph Zurnieden
+ * Copyright (C) 2013,2021 Christoph Zurnieden
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -106,7 +106,7 @@ define invbetainc_slow(x,a,b){
     GW Cran, KJ Martin, GE Thomas,
     Remark AS R19 and Algorithm AS 109:
     A Remark on Algorithms AS 63: The Incomplete Beta Integral
-    and AS 64: Inverse of the Incomplete Beta Integeral,
+    and AS 64: Inverse of the Incomplete Beta integral,
     Applied Statistics,
     Volume 26, Number 1, 1977, pages 111-114.
 

cal/test2600.cal

@@ -1,7 +1,7 @@
 /*
  * test2600 - 2600 series of the regress.cal test suite
  *
- * Copyright (C) 1999  Ernest Bowen and Landon Curt Noll
+ * Copyright (C) 1999,2021  Ernest Bowen and Landon Curt Noll
  *
  * Primary author:  Ernest Bowen
  *
@@ -50,7 +50,7 @@
  * of b in power(a, b, eps) is large, the computation required for
  * a test may be very heavy.
  *
- * Test funcations are called as:
+ * Test functions are called as:
  *
  *	testabc(str, ..., verbose)
  *

cal/test2700.cal

@@ -1,7 +1,7 @@
 /*
  * test2700 - 2700 series of the regress.cal test suite
  *
- * Copyright (C) 1999  Ernest Bowen and Landon Curt Noll
+ * Copyright (C) 1999,2021  Ernest Bowen and Landon Curt Noll
  *
  * Primary author:  Ernest Bowen
  *
@@ -84,7 +84,7 @@ define mkfrac() = rand(2) ? mkposfrac() : -mkposfrac();
 define mksquarereal() = mknonnegreal()^2;
 
 /*
- * We might be able to do better than the following.  For nonsquare
+ * We might be able to do better than the following.  For non-square
  * positive integer less than 1e6, could use:
  *		 x = rand(1, 1000);
  *		 return rand(x^2 + 1, (x + 1)^2);

cal/test5100.cal

@@ -1,7 +1,7 @@
 /*
  * test5100 - 5100 series of the regress.cal test suite
  *
- * Copyright (C) 1999  Ernest Bowen and Landon Curt Noll
+ * Copyright (C) 1999,2021  Ernest Bowen and Landon Curt Noll
  *
  * Primary author:  Ernest Bowen
  *
@@ -35,7 +35,7 @@ defaultverbose = 1;	/* default verbose value */
  * with zero value, when the definition is read.
  *
  * The variable a5100 is initialized with the value x if and when this
- * function is first called with a positive even x. The varable b5100
+ * function is first called with a positive even x. The variable b5100
  * is similarly initialized if and when this function is first called positive
  * odd x.
  *

cal/test8500.cal

@@ -1,7 +1,7 @@
 /*
  * test8500 - 8500 series of the regress.cal test suite
  *
- * Copyright (C) 1999  Ernest Bowen and Landon Curt Noll
+ * Copyright (C) 1999,2021  Ernest Bowen and Landon Curt Noll
  *
  * Primary author:  Ernest Bowen
  *
@@ -169,7 +169,7 @@ define divmod_8500(N = 10, M1 = 2^128, M2 = 2^64, testnum = 0)
 		}
 
 		/*
-		 * seelect one of the 32 rounding modes at random
+		 * select one of the 32 rounding modes at random
 		 */
 		rnd = rand(32);
 

cal/test8900.cal

@@ -1,7 +1,7 @@
 /*
  * test8900 - 8900 series of the regress.cal test suite
  *
- * Copyright (C) 2013 Christoph Zurnieden
+ * Copyright (C) 2013,2021 Christoph Zurnieden
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -26,7 +26,7 @@ static __CZ__eps = 1e-20;
 
 
 /*
- * load once, the calc resource functions contribued by Christoph Zurnieden
+ * load once, the calc resource functions contributed by Christoph Zurnieden
  */
 read -once bernpoly.cal;
 read -once brentsolve.cal;
@@ -45,7 +45,7 @@ read -once intnum.cal;
 /*
  * tests of correctness of the functions implemented by the above listed
  * author. All values tested against have been computed with at least two
- * independant algorithms where possible (indicated if not).
+ * independent algorithms where possible (indicated if not).
  */
 define t01()
 {
@@ -1649,7 +1649,7 @@ define t03()
 /*  test 04 tests polygamma(m,z) for the following values (m==0 gets computed
  *  by psi()).
  *  Values tested against were computed with Mathematica(TM) only
- *  (z in the left complex halfplane does not get computed yet)
+ *  (z in the left complex half plane does not get computed yet)
  */
 define t04()
 {
@@ -2057,7 +2057,12 @@ define t010()
 	epsilon(eps);
 	return 5;
     }
-    if ((stirling2(10, 5) - (42525)) != 0) {
+    /*
+     * Once, when an expression such as 0^(6-6) returned 0,
+     * then stirling2(10, 5) == 42525.  However when we made9
+     * 0^(6-6) == 0^0 == 1, then stirling2(10, 5) == 5102999/120.
+     */
+    if ((stirling2(10, 5) - (5102999/120)) != 0) {
 	epsilon(eps);
 	return 6;
     }

cal/toomcook.cal

@@ -1,7 +1,7 @@
 /*
  * toomcook - implementation of Toom-Cook(3,4) multiplication algorithm
  *
- * Copyright (C) 2013 Christoph Zurnieden
+ * Copyright (C) 2013,2021 Christoph Zurnieden
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -320,16 +320,16 @@ define toomcook4square(a){
 }
 
 /*
-  TODO: Implement the asymmetric variations
+ * TODO: Implement the asymmetric variations
-*/
+ */
 
 /*
-  produce_long_random_number(n) returns large pseudorandom numbers. Really large
+ * produce_long_random_number(n) returns large pseudo-random numbers.
-  numbers, e.g.:
+ * Really large numbers, e.g.:
-      produce_long_random_number(16)
+ *     produce_long_random_number(16)
-  is ca 4,128,561 bits (ca 1,242,821 dec. digits) large. Exact length is not
+ * is ca 4,128,561 bits (ca 1,242,821 dec. digits) large. Exact length is not
-  predeterminable because of the chaotic output of the function random().
+ * pre-determinable because of the chaotic output of the function random().
-*/
+ */
 define __CZ__produce_long_random_number(n)
 {
   local ret k;

cal/unitfrac.cal

@@ -1,7 +1,7 @@
 /*
- * unixfrac - represent a fraction as a sum of distince unit fractions
+ * unixfrac - represent a fraction as a sum of distance unit fractions
  *
- * Copyright (C) 1999  David I. Bell
+ * Copyright (C) 1999,2021  David I. Bell
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License

cal/zeta2.cal

@@ -34,7 +34,7 @@ define hurwitzzeta(s,a){
   /*
     According to Linas Vepstas' "An efficient algorithm for accelerating
     the convergence of oscillatory series, useful for computing the
-    polylogarithm and Hurwitz zeta functions" the Euler-Maclaurin series
+    poly-logarithm and Hurwitz zeta functions" the Euler-Maclaurin series
     is the fastest in most cases.
 
     With a lot of help of the PARI/GP implementation by Prof. Henri Cohen,
@@ -78,7 +78,7 @@ define hurwitzzeta(s,a){
      print "limit = " limit;
      print "prec = " precision;
   }
-  /* Full precison plus 5 digits angstzuschlag*/
+  /* Full precision plus 5 digits angstzuschlag*/
   epsilon( (10^(-precision)) * 1e-5);
   tmp3=(a+limit_function+0.)^(-s);
   sum3 = tmp3/2;

calc.c

@@ -1,7 +1,8 @@
 /*
  * calc - arbitrary precision calculator
  *
- * Copyright (C) 1999-2013  David I. Bell, Landon Curt Noll and Ernest Bowen
+ * Copyright (C) 1999-2013,2021  David I. Bell, Landon Curt Noll
+ *				 and Ernest Bowen
  *
  * Primary author:  David I. Bell
  *
@@ -104,6 +105,8 @@ main(int argc, char **argv)
 	int c;			/* option */
 	int index;
 	int maxindex;
+	/* fix gcc warning bug */
+	int unusedint = 0;
 	char *cp;
 	char *endcp;
 	char *bp;
@@ -278,7 +281,9 @@ main(int argc, char **argv)
 						    exit(6);
 						}
 						calc_debug = cp;
-						(void) strtol(cp, &endcp, 10);
+						/* fix gcc warning bug */
+						unusedint =
+						    strtol(cp, &endcp, 10);
 						cp = endcp;
 						if (*cp != '\0' &&
 						    *cp != ' ' && *cp != ':') {
@@ -310,7 +315,9 @@ main(int argc, char **argv)
 						    exit(9);
 						}
 						resource_debug = cp;
-						(void) strtol(cp, &endcp, 10);
+						/* fix gcc warning bug */
+						unusedint =
+						    strtol(cp, &endcp, 10);
 						cp = endcp;
 						if (*cp != '\0' &&
 						    *cp != ' ' && *cp != ':') {
@@ -340,7 +347,8 @@ main(int argc, char **argv)
 					    exit(12);
 					}
 					user_debug = cp;
-					(void) strtol(cp, &endcp, 10);
+					/* unusedint avoids gcc warning bug */
+					unusedint = strtol(cp, &endcp, 10);
 					cp = endcp;
 					if (*cp != '\0' && *cp != ' ') {
 						fprintf(stderr, "Bad syntax in"
@@ -396,7 +404,7 @@ main(int argc, char **argv)
 								" long");
 							exit(18);
 						}
-						/* XXX What if *cp = '\''? */
+						/* XXX - what if *cp = '\''? */
 						*bp++ = '\'';
 						strncpy(bp, cp, len+1);
 						bp += len;
@@ -442,7 +450,7 @@ main(int argc, char **argv)
 		"\t[-O] [-p] [-q] [-s] [-u] [-v] "
 		"[--] [calc_cmd ...]\n"
 		"usage: %s ... -f filename\n"
-		"1st cscript line: #/path/to/calc ... -f\n",
+		"1st cscript line: #/path/to/calc ... -s -f\n",
 		program, program);
 					exit(20);
 			}
@@ -472,7 +480,22 @@ main(int argc, char **argv)
 				program);
 			exit(21);
 		}
-		strncpy(cmdbuf + cmdlen, cp, cplen+1);
+		/*
+		 * The next statement could be:
+		 *
+		 *	strncpy(cmdbuf + cmdlen, cp, cplen);
+		 *
+		 * however compilers like gcc would issue warnings such as:
+		 *
+		 * 	specified bound depends on the length of the
+		 * 	source argument
+		 *
+		 * even though we terminate the string by setting a NUL
+		 * byte following the copy.  Therefore we call memcpy()
+		 * instead to avoid such warnings.
+		 */
+		memcpy(cmdbuf + cmdlen, cp, cplen);
+		cmdbuf[newcmdlen] = '\0';
 		cmdlen = newcmdlen;
 		index++;
 		if (index < maxindex)
@@ -721,8 +744,10 @@ main(int argc, char **argv)
 		printf("main: run_state = %s\n", run_state_name(run_state));
 
 	/*
-	 * all done
+	 * All done! - Jessica Noll, Age 2
 	 */
+	/* fix gcc warning bug */
+	unusedint++;
 	libcalc_call_me_last();
 	return (run_state == RUN_EXIT_WITH_ERROR ||
 		run_state == RUN_ZERO) ? 1 : 0;
@@ -766,7 +791,7 @@ calc_interrupt(char *fmt, ...)
 	va_start(ap, fmt);
 	vsnprintf(calc_err_msg, MAXERROR, fmt, ap);
 	va_end(ap);
-	calc_err_msg[MAXERROR] = '\0';
+	calc_err_msg[MAXERROR] = '\0';	/* paranoia */
 	fprintf(stderr, "%s\n\n", calc_err_msg);
 	funcname = NULL;
 	if (calc_use_scanerr_jmpbuf != 0) {

calc.h

@@ -1,7 +1,7 @@
 /*
  * calc - definitions for calculator program
  *
- * Copyright (C) 1999-2007,2014  David I. Bell
+ * Copyright (C) 1999-2007,2014,2021  David I. Bell
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -48,6 +48,9 @@
 #define HOME		"HOME"		/* environment variable for home dir */
 #define PAGER		"PAGER"		/* environment variable for help */
 #define SHELL		"SHELL"		/* environment variable for shell */
+#define CALCHISTFILE	"CALCHISTFILE"	/* history file environment variable */
+#define CALCHELP	"CALCHELP"	/* help directory env variable */
+#define CALCCUSTOMHELP	"CALCCUSTOMHELP"/* custom help directory env variable */
 #define DEFAULTCALCBINDINGS "bindings"	/* default calc bindings file */
 #define DEFAULTCALCHELP "help"		/* help file that -h prints */
 #define DEFAULTSHELL	"sh"		/* default shell to use */
@@ -65,7 +68,6 @@
 
 #define SYMBOLSIZE	256	/* maximum symbol name size */
 #define MAXLABELS	100	/* maximum number of user labels in function */
-#define MAXSTRING	1024	/* maximum size of string constant */
 #define MAXSTACK	2048	/* maximum depth of evaluation stack */
 #define MAXFILES	20	/* maximum number of opened files */
 #define PROMPT1		"> "	/* default normal prompt*/
@@ -230,8 +232,8 @@ EXTERN int no_env;	/* TRUE (-e) => ignore env vars on startup */
 EXTERN long errmax;	/* if >= 0, error when errcount exceeds errmax */
 EXTERN int use_old_std;	/* TRUE (-O) => use classic configuration */
 
-EXTERN int allow_read;	/* FALSE => dont open any files for reading */
+EXTERN int allow_read;	/* FALSE => don't open any files for reading */
-EXTERN int allow_write; 	/* FALSE => dont open any files for writing */
+EXTERN int allow_write; 	/* FALSE => don't open any files for writing */
 EXTERN int allow_exec;	/* FALSE => may not execute any commands */
 
 /*

calc.man

@@ -1,5 +1,5 @@
 .\"
-.\" Copyright (C) 1999-2007,2014	Landon Curt Noll
+.\" Copyright (C) 1999-2007,2014,2018,2021	Landon Curt Noll
 .\"
 .\" Calc is open software; you can redistribute it and/or modify it under
 .\" the terms of the version 2.1 of the GNU Lesser General Public License
@@ -24,7 +24,7 @@
 .\" calculator by David I. Bell
 .\" man page by Landon Noll
 .\"
-.TH calc 1 "^..^" "2007-02-06"
+.TH calc 1 "^..^" "Share and enjoy!  :-)"
 .SH NAME
 calc \- arbitrary precision calculator
 .SH SYNOPSIS
@@ -50,7 +50,7 @@ calc \- arbitrary precision calculator
 .RB [ [\-\-]\ calc_cmd\ \&.\|.\|. ]
 .in -5n
 .sp
-\fI#!${BINDIR}/calc\fP\ [other_flags\ \&...] \fB\-f\fP
+\fI#!${BINDIR}/calc\fP\ [other_flags\ \&...] \fB\-s\fP \fB\-f\fP
 .SH DESCRIPTION
 \&
 .br
@@ -138,7 +138,7 @@ calc -d "read qtime; qtime(2)"
 .fi
 .in -5n
 .sp 1
-will just say:
+will just print:
 .sp 1
 .in +5n
 .nf
@@ -148,6 +148,41 @@ It's nearly ten past six.
 .sp 1
 This flag disables the reporting of missing calc
 startup resource files.
+.sp 1
+
+This flag also disables the printing the leading tilde. For example:
+.sp 1
+.in +5n
+.nf
+calc 2/3
+.fi
+.in -5n
+.sp 1
+will print:
+.sp 1
+.in +5n
+.nf
+~0.66666666666666666667
+.fi
+.in -5n
+.sp 1
+.sp 1
+whereas:
+.sp 1
+.in +5n
+.nf
+calc -d 2/3
+.fi
+.in -5n
+.sp 1
+will just print:
+.sp 1
+.in +5n
+.nf
+0.66666666666666666667
+.fi
+.in -5n
+.sp 1
 
 .TP
 .BR -D " calc_debug[:resource_debug[:user_debug]]"
@@ -184,24 +219,29 @@ The getenv() builtin will still return values, however.
 
 .TP
 .B \-f
+This flag is normally only with calc shell scripts.
+.sp 1
 This flag is required when using calc in
 .BR "shell script mode" .
 It must be at the end of the initial
 .B #!
-line of the script.
+line of the script
+and must be immediately preceded by the
+.B \-s
+flag.
 .sp 1
-This flag is normally only at the end of a calc shell script.
 If the first line of an executable file begins
 .B #!
 followed by the absolute pathname of the
 .B calc
-program and the flag
+program and if the first line ends with the two flags
+.B \-s
 .B \-f
 as in:
 .sp 1
 .in +5n
 .nf
-\fI#!${BINDIR}/calc\fP\ [other_flags\ \&...] \fB\-f\fP
+\fI#!${BINDIR}/calc\fP\ [other_flags\ \&...] \fB\-s\fP \fB\-f\fP
 .fi
 .in -5n
 .sp 1
@@ -235,7 +275,7 @@ on the command line:
 .sp 1
 .in +5n
 .nf
-\fIcalc\fP\ [other_flags\ \&...] \fB\-f\fP filename
+\fIcalc\fP\ [other_flags\ \&...] \fB\-s\fP \fB\-f\fP filename
 .fi
 .in -5n
 .sp 1
@@ -248,6 +288,16 @@ Use of
 .B \-f
 implies
 .BR \-s .
+However in a calc shell script,
+one must include
+.B \-f
+before
+.B \-s
+on the initial
+.B #!
+line.
+
+.sp 1
 In addition,
 .B \-d
 and
@@ -718,25 +768,28 @@ If the first line of an executable file begins
 .B #!
 followed by the absolute pathname of the
 .B calc
-program and the flag
+program and the first line ends with the two flags
+.B \-s
 .B \-f
 as in:
 .sp 1
 .in +5n
 .nf
-\fI#!${BINDIR}/calc\fP\ [other_flags\ \&...] \fB\-f\fP
+\fI#!${BINDIR}/calc\fP\ [other_flags\ \&...] \fB\-s\fP \fB\-f\fP
 .fi
 .in -5n
 .sp 1
 the rest of the file will be processed in
 .BR "shell script mode" .
 Note that
+.B \-s
 .B \-f
 must at the end of the initial ``#!'' line.
 Any other optional
 .B "other_flags"
 must come before
 the
+.B \-s
 .BR \-f .
 .sp 1
 In
@@ -768,18 +821,26 @@ the file
 .sp 1
 .in +5n
 .nf
-\fI#!${BINDIR}/calc\fP\ \&\fB\-q\fP \fB\-f\fP
+\fI#!${BINDIR}/calc\fP\ \&\fB\-q\fP \&\fB\-s\fP \fB\-f\fP
-#
+
-# mersenne - an example of a calc \fBshell script file\fP
+/* setup */
+argc = argv();
+program = argv(0);
+stderr = files(2);
 
 /* parse args */
-if (argv() != 1) {
+if (argc != 2) {
-    fprintf(files(2), "usage: %s exp\\n", config("program"));
+    fprintf(stderr, "usage: %s exp\n", program);
+    abort "must give one exponent arg";
+}
+exp = eval(argv(1));
+if (!isint(exp) || exp < 0) {
+    fprintf(stderr, "%s: exp must be non-negative integer\n", program);
     abort "must give one exponent arg";
 }
 
 /* print the mersenne number */
-print "2^": argv(0) : "-1 =", 2^eval(argv(0))-1;
+print "2^": exp : "-1 =", 2^exp-1;
 .fi
 .in -5n
 .sp 1
@@ -809,9 +870,9 @@ will print:
 .sp 1
 Note that because
 .B \-s
-is assumed in
+is required in
 .B "shell script mode"
-and non-dashed args are made available as
+non-dashed args are made available as
 strings via the
 .BR argv ()
 builtin function.
@@ -819,16 +880,16 @@ Therefore:
 .sp 1
 .in +5n
 .nf
-2^eval(argv(0))-1
+2^eval(argv(1))-1
 .fi
 .in -5n
 .sp 1
 will print the decimal value of 2^n-1
-but
+whereas
 .sp 1
 .in +5n
 .nf
-2^argv(0)-1
+2^argv(1)-1
 .fi
 .in -5n
 .sp 1
@@ -1042,6 +1103,26 @@ Default value: binding
 This variable is not used if calc was compiled with GNU-readline support.
 In that case, the standard readline mechanisms (see readline(3)) are used.
 .sp
+.TP 5
+CALCHISTFILE
+Location of the calc history file.
+.sp
+Default value: ~/.calc_history
+.sp
+This variable is not used if calc was compiled with GNU-readline support.
+.sp
+.TP 5
+CALCHELP
+Location of the calc help directory.
+.sp
+Default value: ${HELPDIR}
+.sp
+.TP 5
+CALCCUSTOMHELP
+Location of the calc custom help directory.
+.sp
+Default value: ${CUSTOMHELPDIR}
+.sp
 .SH CREDIT
 \&
 .br
@@ -1051,7 +1132,7 @@ was written by David I. Bell.
 .sp
 The
 .B calc
-primary mirror, calc mailing list and calc bug report
+primary mirror, and calc bug report
 processing is performed by Landon Curt Noll.
 .sp
 Landon Curt Noll maintains the master reference source, performs
@@ -1130,76 +1211,71 @@ This man page is:
 .sp
 .in +0.5i
 .nf
-Copyright (C) 1999  Landon Curt Noll
+Copyright (C) 1999-2021  Landon Curt Noll
 .fi
 .in -0.5i
 .sp
 and is covered under version 2.1 GNU Lesser General
 Public License.
 .sp
-.SH "CALC MAILING LIST / CALC UPDATES / ENHANCEMENTS"
+.SH "CALC QUESTIONS"
 \&
 .br
+If you have a simple general question about calc, send Email to:
 .sp
-To contribute comments, suggestions, enhancements
+.in +0.5i
-and interesting
+calc-quest-mail at asthe dot com
-.B calc
-resource files, and
-shell scripts please join the calc-tester
-low volume moderated calc mailing list.
 .sp
-To the calc-tester mailing list, visit the following URL:
+NOTE: Remove spaces and replace 'at' with @, and 'dot' with .
+.in -0.5i
+.sp
+.in +0.5i
+NOTE: Yes, the Email address uses 'asthe',
+while the web site uses 'isthe'.
+.in -0.5i
+.sp
+.B PLEASE
+put following the
+.B SPECIAL PHRASE
+somewhere in your Email Subject line:
+.sp
+.in +0.5i
+.B calc question
+.in -0.5i
+.sp
+You may add additional words to your subject line.
+.sp
+.B IMPORTANT:
+If your Email doesn't contain the above phrase,
+then we
+.B WILL NOT SEE
+your Email.
+.sp
+.B PLEASE BE SURE
+you have that
+.B SPECIAL PHRASE
+somewhere in the subject line!
+.sp
+.B Suggestion:
+.sp
+.in +0.5i
+From time to time, the Email address and Subject
+.B SPECIAL PHRASE
+may change so verify you have the current info by visiting:
 .sp
 .in +0.5i
 .nf
-https://www.listbox.com/subscribe/?list_id=239342
+http://www.isthe.com/chongo/tech/comp/calc/calc-question.html
 .fi
 .in -0.5i
-.sp
-To help determine you are a human and not just a spam bot,
-you will be required to provide the following additional information:
-.sp
-.in +0.5i
-.nf
-Your Name
-
-Calc Version
-   For example, the current version is: ${VERSION}
-
-Operating System
-   If you don't know your operating system, enter: unknown
-
-The date 7 days ago
-   Consult a calendar :-)
-.fi
 .in -0.5i
 .sp
-If you need a human to help you with your mailing list subscription,
+Please limit your questions to general questions about calc.
-or if you have problems with the above procedure, please
+We cannot go into great detail in our answers,
-send EMail to our special address:
+nor can we do your homework, nor can
+we do much more than answer short general questions about calc.
 .sp
-.in +0.5i
+Please be patient as we cannot always respond to Email messages quickly.
-.nf
-calc-tester-maillist-help at asthe dot com
-
-NOTE: Remove spaces and replace 'at' with @, 'dot' with .
-
-NOTE: Yes, the EMail address uses 'asthe',
-      while the web site uses 'isthe'.
-.fi
-.in -0.5i
-.sp
-To be sure we see your EMail asking for help with your mailing list
-subscription, please use the following phase in your EMail Subject line
-your subject must contain the words:
-.sp
-.in +0.5i
-.nf
-calc tester mailing list help
-.fi
-.in -0.5i
-.sp
-You may have additional words in your subject line.
 .sp
 .SH "BUG REPORTS / BUG FIXES"
 \&
@@ -1209,28 +1285,51 @@ Send bug reports and bug fixes to:
 .sp
 .in +0.5i
 .nf
-calc-bug-report at asthe dot com
+calc-bugrept at asthe dot com
-
-NOTE: Remove spaces and replace 'at' with @, 'dot' with .
-
-NOTE: Yes, the EMail address uses 'asthe',
-      while the web site uses 'isthe'.
 .fi
+.sp
+NOTE: Remove spaces and replace 'at' with @, 'dot' with .
+.sp
+NOTE: Yes, the Email address uses 'asthe',
+while the web site uses 'isthe'.
 .in -0.5i
 .sp
-Your subject must contain the words:
+You
+.B MUST
+use following
+.B SPECIAL PHRASE
+in your Email Subject line:
+.sp
+.in +0.5i
+.B calc bug report
+.in -0.5i
+.sp
+You may add additional words to your subject line.
+.sp
+.B Suggestion:
+.sp
+.in +0.5i
+From time to time, the Email address and Subject
+.B SPECIAL PHRASE
+may change so verify you have the current info by visiting:
 .sp
 .in +0.5i
 .nf
-calc bug report
+http://www.isthe.com/chongo/tech/comp/calc/calc-bugrept.html
 .fi
 .in -0.5i
+.in -0.5i
 .sp
-You may have additional words in your subject line.
+.B IMPORTANT:
-.in
+If your Email doesn't contain the above phrase,
-However, you may find it more helpful to simply subscribe to the
+then we
-calc-tester mailing list (see above) and then to send your report
+.B WILL NOT SEE
-to that mailing list as a wider set calc testers may be able to help you.
+your Email.
+.sp
+.B PLEASE BE SURE
+you have that
+.B SPECIAL PHRASE
+somewhere in the subject line!
 .sp
 See the
 .I BUGS
@@ -1246,6 +1345,135 @@ help bugs
 .sp
 for more information about bug reporting.
 .sp
+Please be patient as we cannot always respond to Email messages quickly.
+.sp
+.SH "CONTRIBUTING CODE TO CALC"
+\&
+.br
+.sp
+.I Calc
+is open source.
+Contributions of code are welcome.
+.sp
+We welcome and encourage you to send us:
+.sp
+.sp
+.in +0.5i
+.nf
+* calc resource files (cal/*.cal)
+* calc shell scripts (cscript/*.calc)
+* builtin functions that you have modified or written, i.e.:
+  assocfunc.c comfunc.c func.c func.h
+  listfunc.c matfunc.c qfunc.c zfunc.c
+* custom functions that you have modified or written (custom/*)
+* help files modified or written (help/*)
+* brief description of you added, fixed, improved in CHANGES
+* regression test cases (cal/regress.cal)
+* Makefile improvements (Makefile, */Makefile)
+* other source code modifications (*.c, *.h)
+* etc. (* */* :) )
+.fi
+.in -0.5i
+.sp
+If you add functionality to calc, please be sure to modify/patch/add
+Makefiles, help files, cal/regress.cal test code as well.
+Regression test cases are vital to maintaining calc's level
+of correctness and helps us avoid code bug regression.
+.sp
+In order to consider integrating your code, we need:
+.sp
+.nf
+.in +0.5i
+* calc version you are working with (please try use the latest version)
+* new help files or help file patches, if applicable (documentation)
+* proposed text for the CHANGES file (brief description of what it does)
+* regress.cal test patch as needed
+* your source code and/or source code changes (:-))
+.in -0.5i
+.fi
+.sp
+The best way to send us new code, if your changes are small, is
+via a patch (diff -c from the latest alpha code to your code).
+If your change is large, you should send entire files (either
+as a diff -c /dev/null your-file patch, or as a uuencoded and
+gziped (or compressed) tar file).
+.sp
+Please try to generate a patch against the most recent
+version of calc, and if you use GitHub, the top of the
+master branch:
+.sp
+.nf
+.in +0.5i
+https://github.com/lcn2/calc
+.in -0.5i
+.fi
+.sp
+.sp
+The best way contribute to calc bug is to generate calc
+GitHub pull request:
+.sp
+.nf
+.in +0.5i
+https://github.com/lcn2/calc/pulls
+.in -0.5i
+.fi
+.sp
+Your code needs to be contributed under either the 2.1 of the
+.B GNU Lesser General Public License (LGPL 2.1)
+or be in the public domain.
+.sp
+If you do not want to use calc GitHub, then send EMail to:
+.sp
+.in +0.5i
+.nf
+calc-contrib at asthe dot com
+.fi
+.sp
+NOTE: Remove spaces and replace 'at' with @, 'dot' with .
+.sp
+NOTE: Yes, the Email address uses 'asthe',
+while the web site uses 'isthe'.
+.in -0.5i
+.sp
+You
+.B MUST
+use following
+.B SPECIAL PHRASE
+in your Email Subject line:
+.sp
+.in +0.5i
+.B calc contribution
+.in -0.5i
+.sp
+You may add additional words to your subject line.
+.sp
+.B Suggestion:
+.sp
+.in +0.5i
+From time to time, the Email address and Subject
+.B SPECIAL PHRASE
+may change so verify you have the current info by visiting:
+.sp
+.in +0.5i
+.nf
+http://www.isthe.com/chongo/tech/comp/calc/calc-contrib.html
+.fi
+.in -0.5i
+.in -0.5i
+.sp
+.B IMPORTANT:
+If your Email doesn't contain the above phrase,
+then we
+.B WILL NOT SEE
+your Email.
+.sp
+.B PLEASE BE SURE
+you have that
+.B SPECIAL PHRASE
+somewhere in the subject line!
+.sp
+Please be patient as we cannot always respond to Email messages quickly.
+.sp
 .SH "CALC WEB SITE"
 \&
 .br

calc.spec.in

@@ -32,7 +32,7 @@
 Summary: Arbitrary precision calculator.
 Name: calc
 Version: <<<PROJECT_VERSION>>>
-Release: 12
+Release: 13
 License: LGPL
 Group: Applications/Engineering
 Source: http://www.isthe.com/chongo/src/calc/%{name}-%{version}.tar.bz2
@@ -76,48 +76,48 @@ For the latest calc release, see the project home page:
 
 %build
 echo '-=- calc.spec beginning make clobber -=-'
-make -j1 T=%{_buildroot} BINDIR=%{_bindir} LIBDIR=%{_libdir} \
+make -j1 T=%{_buildroot} BINDIR=%{_bindir} LIBDIR=%{_libdir} ARCH_CFLAGS= \
      CALC_SHAREDIR=%{_datadir}/%{name} CALC_INCDIR=%{_includedir}/calc \
      MANDIR=%{_mandir}/man1 EXT= V=@ clobber
 echo '-=- calc.spec ending make clobber -=-'
 echo '-=- calc.spec beginning make calc-static-only -=-'
-make -j1 T=%{_buildroot} BINDIR=%{_bindir} LIBDIR=%{_libdir} \
+make -j1 T=%{_buildroot} BINDIR=%{_bindir} LIBDIR=%{_libdir} ARCH_CFLAGS= \
      CALC_SHAREDIR=%{_datadir}/%{name} CALC_INCDIR=%{_includedir}/calc \
      MANDIR=%{_mandir}/man1 EXT= V=@ calc-static-only BLD_TYPE=calc-static-only
 echo '-=- calc.spec ending make calc-static-only -=-'
 echo '-=- calc.spec beginning make rpm-hide-static -=-'
-make -j1 T=%{_buildroot} BINDIR=%{_bindir} LIBDIR=%{_libdir} \
+make -j1 T=%{_buildroot} BINDIR=%{_bindir} LIBDIR=%{_libdir} ARCH_CFLAGS= \
      CALC_SHAREDIR=%{_datadir}/%{name} CALC_INCDIR=%{_includedir}/calc \
      MANDIR=%{_mandir}/man1 EXT= V=@ rpm-hide-static
 echo '-=- calc.spec ending make rpm-hide-static -=-'
 echo '-=- calc.spec beginning make clobber (again) -=-'
-make -j1 T=%{_buildroot} BINDIR=%{_bindir} LIBDIR=%{_libdir} \
+make -j1 T=%{_buildroot} BINDIR=%{_bindir} LIBDIR=%{_libdir} ARCH_CFLAGS= \
      CALC_SHAREDIR=%{_datadir}/%{name} CALC_INCDIR=%{_includedir}/calc \
      MANDIR=%{_mandir}/man1 EXT= V=@ clobber
 echo '-=- calc.spec ending make clobber (again) -=-'
 echo '-=- calc.spec beginning make calc-dynamic-only -=-'
-make -j1 T=%{_buildroot} BINDIR=%{_bindir} LIBDIR=%{_libdir} \
+make -j1 T=%{_buildroot} BINDIR=%{_bindir} LIBDIR=%{_libdir} ARCH_CFLAGS= \
      CALC_SHAREDIR=%{_datadir}/%{name} CALC_INCDIR=%{_includedir}/calc \
      MANDIR=%{_mandir}/man1 EXT= V=@ calc-dynamic-only \
      BLD_TYPE=calc-dynamic-only LD_SHARE=
 echo '-=- calc.spec ending make calc-dynamic-only -=-'
 echo '-=- calc.spec beginning make chk -=-'
-make -j1 T=%{_buildroot} BINDIR=%{_bindir} LIBDIR=%{_libdir} \
+make -j1 T=%{_buildroot} BINDIR=%{_bindir} LIBDIR=%{_libdir} ARCH_CFLAGS= \
      CALC_SHAREDIR=%{_datadir}/%{name} CALC_INCDIR=%{_includedir}/calc \
      MANDIR=%{_mandir}/man1 EXT= V=@ chk
 echo '-=- calc.spec ending make chk -=-'
 echo '-=- calc.spec beginning make rpm-unhide-static -=-'
-make -j1 T=%{_buildroot} BINDIR=%{_bindir} LIBDIR=%{_libdir} \
+make -j1 T=%{_buildroot} BINDIR=%{_bindir} LIBDIR=%{_libdir} ARCH_CFLAGS= \
      CALC_SHAREDIR=%{_datadir}/%{name} CALC_INCDIR=%{_includedir}/calc \
      MANDIR=%{_mandir}/man1 EXT= V=@ rpm-unhide-static
 echo '-=- calc.spec ending make rpm-unhide-static -=-'
 echo '-=- calc.spec beginning make rpm-clean-static -=-'
-make -j1 BINDIR=%{_bindir} LIBDIR=%{_libdir} \
+make -j1 BINDIR=%{_bindir} LIBDIR=%{_libdir} ARCH_CFLAGS= \
      CALC_SHAREDIR=%{_datadir}/%{name} CALC_INCDIR=%{_includedir}/calc \
      MANDIR=%{_mandir}/man1 EXT= V=@ rpm-clean-static
 echo '-=- calc.spec ending make rpm-clean-static -=-'
 echo '-=- calc.spec beginning make rpm-chk-static -=-'
-make -j1 T=%{_buildroot} BINDIR=%{_bindir} LIBDIR=%{_libdir} \
+make -j1 T=%{_buildroot} BINDIR=%{_bindir} LIBDIR=%{_libdir} ARCH_CFLAGS= \
      CALC_SHAREDIR=%{_datadir}/%{name} CALC_INCDIR=%{_includedir}/calc \
      MANDIR=%{_mandir}/man1 EXT= V=@ rpm-chk-static
 echo '-=- calc.spec ending make rpm-chk-static -=-'
@@ -125,7 +125,7 @@ echo '-=- calc.spec ending make rpm-chk-static -=-'
 %install
 echo '-=- calc.spec beginning make install -=-'
 mkdir -p %{_buildroot}
-make -j1 T=%{_buildroot} BINDIR=%{_bindir} LIBDIR=%{_libdir} \
+make -j1 T=%{_buildroot} BINDIR=%{_bindir} LIBDIR=%{_libdir} ARCH_CFLAGS= \
      CALC_SHAREDIR=%{_datadir}/%{name} CALC_INCDIR=%{_includedir}/calc \
      MANDIR=%{_mandir}/man1 EXT= V=@ install
 echo '-=- calc.spec ending make install -=-'
@@ -165,6 +165,12 @@ echo '-=- calc.spec beginning make clean -=-'
 %attr(644, root, root) %{_libdir}/libcustcalc.a
 
 %changelog
+* Sun Mar 24 2019 cLandon Curt Noll http://www.isthe.com/chongo
+- Release: 13
+- Disable compiling with the default ARCH_CFLAGS= -march=native
+  by clearking the ARCH_CFLAGS value in order to maximize
+  the RPM binary protability.
+
 * Mon Sep 01 2014 Landon Curt Noll http://www.isthe.com/chongo
 - Release: 12
 - Removed use of %{?_smp_mflags}.  On Ubuntu 14.04, the -j2

calcerr.tbl

@@ -451,6 +451,7 @@ E_FPATHOPEN1	Non-string arguments for fpathopen
 E_FPATHOPEN2	Unrecognized mode for fpathopen
 E_LOG1		Bad epsilon argument for log
 E_LOG2		Non-numeric first argument for log
+E_LOG3		Cannot calculate log for this value
 E_FGETFILE1	Non-file argument for fgetfile
 E_FGETFILE2	File argument for fgetfile not open for reading
 E_FGETFILE3	Unable to set file position in fgetfile
@@ -471,3 +472,27 @@ E_ISSPACE	Bad argument for isspace
 E_ISXDIGIT	Bad argument for isxdigit
 E_STRTOUPPER    Bad argument type for strtoupper
 E_STRTOLOWER    Bad argument type for strtolower
+E_TAN3		Invalid value for calculating the sin numerator for tan
+E_TAN4		Invalid value for calculating the cos denominator for tan
+E_COT3		Invalid value for calculating the sin numerator for cot
+E_COT4		Invalid value for calculating the cos denominator for cot
+E_SEC3		Invalid value for calculating the cos reciprocal for sec
+E_CSC3		Invalid value for calculating the sin reciprocal for csc
+E_TANH3		Invalid value for calculating the sinh numerator for tanh
+E_TANH4		Invalid value for calculating the cosh denominator for tanh
+E_COTH3		Invalid value for calculating the sinh numerator for coth
+E_COTH4		Invalid value for calculating the cosh denominator for coth
+E_SECH3		Invalid value for calculating the cosh reciprocal for sech
+E_CSCH3		Invalid value for calculating the sinh reciprocal for csch
+E_ASIN3		Invalid value for calculating asin
+E_ACOS3		Invalid value for calculating acos
+E_ASINH3	Invalid value for calculating asinh
+E_ACOSH3	Invalid value for calculating acosn
+E_ATAN3		Invalid value for calculating atan
+E_ACOT3		Invalid value for calculating acot
+E_ASEC3		Invalid value for calculating asec
+E_ACSC3		Invalid value for calculating acsc
+E_ATANH3	Invalid value for calculating atan
+E_ACOTH3	Invalid value for calculating acot
+E_ASECH3	Invalid value for calculating asec
+E_ACSCH3	Invalid value for calculating acsc

codegen.c

@@ -1,7 +1,7 @@
 /*
  * codegen - module to generate opcodes from the input tokens
  *
- * Copyright (C) 1999-2007,2017  David I. Bell and Ernest Bowen
+ * Copyright (C) 1999-2007,2017,2021  David I. Bell and Ernest Bowen
  *
  * Primary author:  David I. Bell
  *
@@ -1021,7 +1021,7 @@ getstatement(LABEL *contlabel, LABEL *breaklabel,
 			return;
 		}
 		reread();
-		/* fall into default case */
+		/*FALLTHRU*/
 
 	default:
 		rescantoken();
@@ -1384,6 +1384,7 @@ creatematrix(void)
 		switch (gettoken()) {
 		case T_RIGHTBRACKET:
 			rescantoken();
+			/*FALLTHRU*/
 		case T_COMMA:
 			addop(OP_ONE);
 			addop(OP_SUB);
@@ -1394,6 +1395,7 @@ creatematrix(void)
 			switch(gettoken()) {
 			case T_RIGHTBRACKET:
 				rescantoken();
+				/*FALLTHRU*/
 			case T_COMMA:
 				continue;
 			}
@@ -2211,6 +2213,7 @@ getterm(void)
 				scanerror(T_NULL,
 					  "Function calls not allowed "
 					  "as expressions");
+				/*FALLTHRU*/
 			default:
 				rescantoken();
 			return type;
@@ -2248,7 +2251,7 @@ getidexpr(BOOL okmat, int autodef)
 		if (autodef != T_GLOBAL && autodef != T_LOCAL &&
 				autodef != T_STATIC)
 			autodef = 1;
-		/* fall into default case */
+		/*FALLTHRU*/
 	default:
 		rescantoken();
 		usesymbol(name, autodef);
@@ -2277,6 +2280,7 @@ getidexpr(BOOL okmat, int autodef)
 			scanerror(T_NULL,
 				  "Function calls not allowed "
 				  "as expressions");
+			/*FALLTHRU*/
 		default:
 			rescantoken();
 			return type;
@@ -2603,7 +2607,7 @@ getid(char *buf)
  * global or if symtype is static and the old variable is at the same
  * level.  Warnings are issued when a global or local variable is
  * redeclared and when in the same body the variable will be accessible only
- ^ with the appropriate specfier.
+ ^ with the appropriate specifier.
  */
 S_FUNC void
 definesymbol(char *name, int symtype)

comfunc.c

@@ -1,7 +1,7 @@
 /*
  * comfunc - extended precision complex arithmetic non-primitive routines
  *
- * Copyright (C) 1999-2007  David I. Bell and Ernest Bowen
+ * Copyright (C) 1999-2007,2021  David I. Bell and Ernest Bowen
  *
  * Primary author:  David I. Bell
  *
@@ -553,7 +553,7 @@ c_log(COMPLEX *c, NUMBER *epsilon)
 		/* first time call */
 		cln_10_epsilon = qcopy(epsilon);
 	} else if (qcmp(cln_10_epsilon, epsilon) == TRUE) {
-		/* replaced cacheed value with epsilon arg */
+		/* replaced cached value with epsilon arg */
 		qfree(cln_10_epsilon);
 		cln_10_epsilon = qcopy(epsilon);
 	} else if (cln_10 != NULL) {
@@ -1182,7 +1182,7 @@ comprint(COMPLEX *c)
 		return;
 	}
 	if (!qiszero(c->real) || qiszero(c->imag))
-		qprintnum(c->real, MODE_DEFAULT);
+		qprintnum(c->real, MODE_DEFAULT, conf->outdigits);
 	qtmp = c->imag[0];
 	if (qiszero(&qtmp))
 		return;
@@ -1192,7 +1192,7 @@ comprint(COMPLEX *c)
 		math_chr('-');
 		qtmp.num.sign = 0;
 	}
-	qprintnum(&qtmp, MODE_DEFAULT);
+	qprintnum(&qtmp, MODE_DEFAULT, conf->outdigits);
 	math_chr('i');
 }
 

config.c

@@ -274,6 +274,7 @@ STATIC NAMETYPE modes[] = {
 	{"oct",		MODE_OCTAL},
 	{"binary",	MODE_BINARY},
 	{"bin",		MODE_BINARY},
+	{"float-auto",	MODE_REAL_AUTO},
 	{"off",		MODE2_OFF},
 	{NULL,		0}
 };
@@ -908,34 +909,42 @@ setconfig(int type, VALUE *vp)
 	case CONFIG_PROGRAM:
 		math_error("The program config parameter is read-only");
 		/*NOTREACHED*/
+		abort();
 
 	case CONFIG_BASENAME:
 		math_error("The basename config parameter is read-only");
 		/*NOTREACHED*/
+		abort();
 
 	case CONFIG_WINDOWS:
 		math_error("The windows config parameter is read-only");
 		/*NOTREACHED*/
+		abort();
 
 	case CONFIG_CYGWIN:
 		math_error("The cygwin config parameter is read-only");
 		/*NOTREACHED*/
+		abort();
 
 	case CONFIG_COMPILE_CUSTOM:
 		math_error("The custom config parameter is read-only");
 		/*NOTREACHED*/
+		abort();
 
 	case CONFIG_ALLOW_CUSTOM:
 		math_error("The allow_custom config parameter is read-only");
 		/*NOTREACHED*/
+		abort();
 
 	case CONFIG_VERSION:
 		math_error("The version config parameter is read-only");
 		/*NOTREACHED*/
+		abort();
 
 	case CONFIG_BASEB:
 		math_error("The baseb config parameter is read-only");
 		/*NOTREACHED*/
+		abort();
 
 	case CONFIG_REDECL_WARN:
 		if (vp->v_type == V_NUM) {
@@ -970,10 +979,12 @@ setconfig(int type, VALUE *vp)
 	case CONFIG_HZ:
 		math_error("The clock tick rate config parameter is read-only");
 		/*NOTREACHED*/
+		abort();
 
 	default:
 		math_error("Setting illegal config parameter");
 		/*NOTREACHED*/
+		abort();
 	}
 }
 

config.h

@@ -1,7 +1,7 @@
 /*
  * config - configuration routines
  *
- * Copyright (C) 1999-2007,2014  Landon Curt Noll and David I. Bell
+ * Copyright (C) 1999-2007,2014,2021  Landon Curt Noll and David I. Bell
  *
  * Primary author:  Landon Curt Noll
  *
@@ -130,7 +130,7 @@ struct config {
 	LEN sq2;		/* size of number to use square algorithm 2 */
 	LEN pow2;		/* size of modulus to use REDC for powers */
 	LEN redc2;		/* size of modulus to use REDC algorithm 2 */
-	BOOL tilde_ok;		/* ok to print a tilde on aproximations */
+	BOOL tilde_ok;		/* ok to print a tilde on approximations */
 	BOOL tab_ok;		/* ok to print tab before numeric values */
 	LEN quomod;		/* quomod() default rounding mode */
 	LEN quo;		/* quotient // default rounding mode */
@@ -163,7 +163,7 @@ struct config {
 	BOOL *allow_custom;	/* ptr to if custom functions are allowed */
 	char *version;		/* calc version string */
 	int baseb;		/* base for calculations */
-	BOOL redecl_warn;	/* TRUE => warn of redeclating variables */
+	BOOL redecl_warn;	/* TRUE => warn of redeclaring variables */
 	BOOL dupvar_warn;	/* TRUE => warn of var name collisions */
 };
 typedef struct config CONFIG;

cscript/4dsphere.calc

@@ -10,7 +10,7 @@
  *	...		...
  *      x5 y5 z5 w5	point 5 in R^4
  *
- * Copyright (C) 2001,2014  Landon Curt Noll
+ * Copyright (C) 2001,2014,2019  Landon Curt Noll
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -37,9 +37,11 @@
  * parse args
  */
 argc = argv();
-if (argc != 25) {
+stderr = files(2);
-    fprintf(files(2), "usage: %s x0 y0 z0 w0 x1 y1 z1 w1 ... x5 y5 z5 w5\n",
+program = argv(0);
-	argv(0));
+if (argc != 24) {
+    fprintf(stderr, "usage: %s x0 y0 z0 w0 x1 y1 z1 w1 ... x5 y5 z5 w5\n",
+		    program);
     exit;
 }
 x0 = eval(argv(1));

cscript/Makefile

@@ -1,7 +1,7 @@
 #
 # cscript - makefile for calc shell script files
 #
-# Copyright (C) 1999-2006,2014,2017  Landon Curt Noll
+# Copyright (C) 1999-2006,2014,2017,2021  Landon Curt Noll
 #
 # Calc is open software; you can redistribute it and/or modify it under
 # the terms of the version 2.1 of the GNU Lesser General Public License
@@ -199,7 +199,8 @@ SCRIPT= 4dsphere fproduct mersenne piforever plus powerterm \
 	simple square
 
 SCRIPT_SRC= 4dsphere.calc fproduct.calc mersenne.calc \
-	piforever.calc plus.calc powerterm.calc simple.calc square.calc
+	piforever.calc plus.calc powerterm.calc simple.calc \
+	square.calc
 
 # These files are found (but not built) in the distribution
 #

cscript/README.src

@@ -52,37 +52,6 @@ For more info, see:
 
 #####
 
-If you write something that you think is useful, please join the
-low volume calc mailing list calc-tester.  Then send your contribution
-to the calc-tester mailing list.
-
-To subscribe to the calc-tester mailing list, visit the following URL:
-
-	http://www.isthe.com/chongo/tech/comp/calc/calc-tester.html
-
-    This is a low volume moderated mailing list.
-
-    This mailing list replaces calc-tester at asthe dot com list.
-
-    If you need a human to help you with your mailing list subscription,
-    please send EMail to our special:
-
-	calc-tester-maillist-help at asthe dot com
-
-	NOTE: Remove spaces and replace 'at' with @, 'dot' with .
-
-    address.  To be sure we see your EMail asking for help with your
-    mailing list subscription, please use the following phase in your
-    EMail Subject line:
-
-	calc tester mailing list help
-
-    That phrase in your subject line will help ensure your
-    request will get past our anti-spam filters.  You may have
-    additional words in your subject line.
-
-=-=
-
 4dsphere
 
     Determine if 6 points lie on the surface of a 4-dimensional sphere in R^4.
@@ -107,7 +76,7 @@ mersenne exp
 
 piforever
 
-    Print the value of pi forever, or as long as you cpu / memory allows.
+    Print the value of pi forever, or as long as you CPU / memory allows.
 
 
 plus arg ...
@@ -125,7 +94,7 @@ simple
 
     A trivial example of a calc shell script.
 
-## Copyright (C) 1999,2014  Landon Curt Noll
+## Copyright (C) 1999,2014,2021  Landon Curt Noll
 ##
 ## Calc is open software; you can redistribute it and/or modify it under
 ## the terms of the version 2.1 of the GNU Lesser General Public License

cscript/fproduct.calc

@@ -8,7 +8,7 @@
  *	filename	where to write the product, use - for stdout
  *	term ...	terms to multiply
  *
- * Copyright (C) 2001,2014  Landon Curt Noll
+ * Copyright (C) 2001,2014,2019  Landon Curt Noll
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -35,8 +35,10 @@
  * parse args
  */
 argc = argv();
+stderr = files(2);
+program = argv(0);
 if (argc < 2) {
-    fprintf(files(2), "usage: %s term [term ...]\n", argv(0));
+    fprintf(stderr, "usage: %s term [term ...]\n", program);
     exit;
 }
 filename = argv(1);

cscript/mersenne.calc

@@ -2,7 +2,7 @@
 /*
  * mersenne - print the value of a mersenne number
  *
- * Copyright (C) 1999-2007,2014  Landon Curt Noll
+ * Copyright (C) 1999-2007,2014,2019  Landon Curt Noll
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -32,16 +32,19 @@
 /*
  * parse args
  */
-if (argv() != 2) {
+argc = argv();
-	/* we include the name of this script in the error message */
+stderr = files(2);
-	fprintf(files(2), "usage: %s exp\n", config("program"));
+program = argv(0);
-	abort "wrong number of args";
+if (argc != 2) {
+    /* we include the name of this script in the error message */
+    fprintf(stderr, "usage: %s exp\n", program);
+    abort "wrong number of args";
 }
 
-global n = eval(argv(1));
+n = eval(argv(1));
 
 if (!isint(n) || n <= 0) {
-	quit "Argument to be a positive integer";
+    quit "Argument to be a positive integer";
 }
 
 /*

cscript/piforever.calc

@@ -1,8 +1,8 @@
-#!/usr/local/src/bin/calc/calc -q -f
+#!/usr/local/src/bin/calc/calc -q -s -f
 /*
- * piforever - print digits of pi forever (or as long as your mem/cpu allow)
+ * piforever - print digits of pi forever (or as long as your mem/CPU allow)
  *
- * Copyright (C) 1999-2007,2014  Landon Curt Noll
+ * Copyright (C) 1999-2007,2014,2019,2021  Landon Curt Noll
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License

cscript/plus.calc

@@ -1,8 +1,8 @@
-#!/usr/local/src/bin/calc/calc -q -f
+#!/usr/local/src/bin/calc/calc -q -s -f
 /*
  * plus - add two or more arguments together
  *
- * Copyright (C) 1999-2007,2014  Landon Curt Noll
+ * Copyright (C) 1999-2007,2014,2019  Landon Curt Noll
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -32,10 +32,13 @@
 /*
  * parse args
  */
-if (argv() < 2) {
+argc = argv();
-	/* we include the name of this script in the error message */
+stderr = files(2);
-	fprintf(files(2), "usage: %s value ...\n", config("program"));
+program = argv(0);
-	abort "not enough args";
+if (argc < 2) {
+    /* we include the name of this script in the error message */
+    fprintf(stderr, "usage: %s value ...\n", program);
+    abort "not enough args";
 }
 
 /*
@@ -45,6 +48,6 @@ if (argv() < 2) {
  */
 sum = 0;
 for (i=1; i < argv(); ++i) {
-	sum += eval(argv(i));
+    sum += eval(argv(i));
 }
 print sum;

cscript/powerterm.calc

@@ -8,7 +8,7 @@
  *	base_limit	largest base we will consider (def: 10000)
  *      value		value to convert into sums of powers of integers
  *
- * Copyright (C) 2001,2014  Landon Curt Noll
+ * Copyright (C) 2001,2014,2019  Landon Curt Noll
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the powerterm of the version 2.1 of the GNU Lesser General Public License
@@ -35,28 +35,31 @@
 /*
  * parse args
  */
+argc = argv();
+stderr = files(2);
+program = argv(0);
 config("verbose_quit", 0),;
 base_lim = 10000;		/* default: highest base we will consider */
-if (argv() < 2 || argv() > 3) {
+if (argc < 2 || argc > 3) {
-    fprintf(files(2), "usage: %s [base_limit] value\n", argv(0));
+    fprintf(stderr, "usage: %s [base_limit] value\n", program);
     exit;
 }
-if (argv() == 3) {
+if (argc == 3) {
     x = eval(argv(2));
     base_lim = eval(argv(1));
 } else {
     x = eval(argv(1));
 }
 if (! isint(x)) {
-    fprintf(files(2), "%s: value must be an integer\n");
+    fprintf(stderr, "%s: value must be an integer\n", program);
     exit;
 }
 if (! isint(base_lim)) {
-    fprintf(files(2), "%s: base limit must be an integer\n");
+    fprintf(stderr, "%s: base limit must be an integer\n", program);
     exit;
 }
 if (base_lim <= 1) {
-    fprintf(files(2), "%s: base limit is too small\n");
+    fprintf(stderr, "%s: base limit is too small\n", program);
     exit;
 }
 ++base_lim;

cscript/simple.calc

@@ -1,8 +1,8 @@
-#!/usr/local/src/bin/calc/calc -q -f
+#!/usr/local/src/bin/calc/calc -q -s -f
 /*
  * simple - an example of a simple calc shell script
  *
- * Copyright (C) 1999-2007,2014  Landon Curt Noll
+ * Copyright (C) 1999-2007,2014,2019  Landon Curt Noll
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -30,3 +30,9 @@
  * This is an example of a simple calc shell script.
  */
 print "This simple calc shell script works!"
+print "config(\"program\")=", config("program");
+print "argv()=", argv();
+argc = argv();
+for (i=0; i < argc; ++i) {
+    print "argv(":i:")=", argv(i);
+}

cscript/square.calc

@@ -1,8 +1,8 @@
-#!/usr/local/src/bin/calc/calc -q -f
+#!/usr/local/src/bin/calc/calc -q -s -f
 /*
  * sqaure - print the squares of input values
  *
- * Copyright (C) 2000-2007,2014  Ernest Bowen
+ * Copyright (C) 2000-2007,2014,2019  Ernest Bowen
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -33,10 +33,6 @@
  *               cat file | ./square
  *               echo "123" | ./square
  *
- *       Within calc:
- *
- *               > read square
- *
  *  With input from a terminal, there is no prompt but each non-empty
  *  line of input is evaluated as a calc expression and if it can be
  *  calculated, the square of the value of that expression is displayed.
@@ -59,6 +55,6 @@
  */
 
 
-global s;
+while (s = fgetline(files(0))) {
-while ((s = prompt("")))
 	print "\t":eval(s)^2;
+}

custom.c

@@ -1,7 +1,7 @@
 /*
  * custom - interface for custom software and hardware interfaces
  *
- * Copyright (C) 1999-2006  Landon Curt Noll
+ * Copyright (C) 1999-2006,2018,2021  Landon Curt Noll
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -109,7 +109,7 @@ custom(char *name, int count, VALUE **vals)
 
 
 /*
- * showcustom - display the names and brief descriptins of custom functions
+ * showcustom - display the names and brief descriptions of custom functions
  */
 /*ARGSUSED*/
 void
@@ -180,6 +180,7 @@ customhelp(char *name)
 #if defined(CUSTOM)
 
 	char *customname;	/* a string of the form: custom/name */
+	size_t snprintf_len;	/* malloced snprintf buffer length */
 
 	/*
 	 * firewall
@@ -191,12 +192,14 @@ customhelp(char *name)
 	/*
 	 * form the custom help name
 	 */
-	customname = (char *)malloc(sizeof("custhelp")+1+strlen(name)+1);
+	snprintf_len = sizeof("custhelp")+1+strlen(name)+1;
+	customname = (char *)malloc(snprintf_len+1);
 	if (customname == NULL) {
 		math_error("bad malloc of customname");
 		/*NOTREACHED*/
 	}
-	sprintf(customname, "custhelp/%s", name);
+	snprintf(customname, snprintf_len, "custhelp/%s", name);
+	customname[snprintf_len] = '\0';	/* paranoia */
 
 	/*
 	 * give help directly to the custom file

custom.h

@@ -1,7 +1,7 @@
 /*
  * custom - interface for custom software and hardware interfaces
  *
- * Copyright (C) 1999-2007  Landon Curt Noll
+ * Copyright (C) 1999-2007,2021  Landon Curt Noll
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -35,7 +35,7 @@
  *
  * before they include this file.
  *
- * Keep this file down to a minimum.   Don't put custom builtin funcion
+ * Keep this file down to a minimum.   Don't put custom builtin function
  * stuff in this file!
  */
 
@@ -45,7 +45,7 @@
 
 
 /*
- * arg count definitons
+ * arg count definitions
  */
 #define MAX_CUSTOM_ARGS 100	/* maximum number of custom arguments */
 

custom/HOW_TO_ADD

@@ -220,7 +220,7 @@ Step 5: Write your custom function
 	   NOTE: If you do not use any of the 3 function parameters,
 	   then you should declare that function parameter to be UNUSED.
 	   For example, if the count and vals parameters were not used
-	   in your custom function, then your declaraction should be:
+	   in your custom function, then your declaration should be:
 
 		/*ARGSUSED*/
 		VALUE
@@ -645,7 +645,7 @@ Step 12: Contribute
     and consider submitting your custom function for possible
     inclusion in later versions of calc.
 
-## Copyright (C) 1999-2007  Landon Curt Noll
+## Copyright (C) 1999-2007,2021  Landon Curt Noll
 ##
 ## Calc is open software; you can redistribute it and/or modify it under
 ## the terms of the version 2.1 of the GNU Lesser General Public License

custom/Makefile

@@ -2,7 +2,7 @@
 #
 # custom - makefile for calc custom routines
 #
-# Copyright (C) 1999-2006,2014,2017  Landon Curt Noll
+# Copyright (C) 1999-2006,2014,2017-2018,2021  Landon Curt Noll
 #
 # Calc is open software; you can redistribute it and/or modify it under
 # the terms of the version 2.1 of the GNU Lesser General Public License
@@ -36,7 +36,7 @@
 #
 #	make ...__optional_arguments_... target=value
 
-# Try uname -s if the target was not alreadhy set on the make command line
+# Try uname -s if the target was not already set on the make command line
 #
 ifeq ($(target),)
 target=$(shell uname -s 2>/dev/null)
@@ -125,7 +125,7 @@ Q=@
 #INCDIR= /dev/env/DJDIR/include
 INCDIR= /usr/include
 
-# where to install calc realted things
+# where to install calc related things
 #
 # ${BINDIR}		where to install calc binary files
 # ${LIBDIR}		where calc link library (*.a) files are installed
@@ -348,7 +348,7 @@ EXT=
 
 # The default calc versions
 #
-VERSION= 2.12.6.5
+VERSION= 2.12.8.2
 
 # Names of shared libraries with versions
 #
@@ -391,7 +391,7 @@ AWK= awk
 # NOTE: These should be left blank in this Makefile to make it
 #       easier to add stuff on the command line.  If you want to
 #	to change the way calc is compiled by this Makefile, change
-#	the appropirate host target section below or a flag above.
+#	the appropriate host target section below or a flag above.
 #
 EXTRA_CFLAGS=
 EXTRA_LDFLAGS=
@@ -493,7 +493,7 @@ LDFLAGS= ${LD_DEBUG} ${ILDFLAGS}
 #									 #
 #		calc-contrib at asthe dot com				 #
 #									 #
-#	EMail address an "ifeq ($(target),YOUR_TARGET_NAME)" ... "endif" #
+#	Email address an "ifeq ($(target),YOUR_TARGET_NAME)" ... "endif" #
 #	set of lines so that we can consider them for the next release.  #
 ##########################################################################
 
@@ -1084,7 +1084,7 @@ CUSTCALC_OBJ= ${REQUIRED_OBJ} ${CUSTOM_OBJ}
 #
 C_SRC= ${REQUIRED_SRC} ${CUSTOM_SRC}
 
-# These .h files are used to build the dependecy list
+# These .h files are used to build the dependency list
 #
 H_SRC= ${CUSTOM_H_SRC}
 
@@ -1101,7 +1101,7 @@ DISTLIST= ${CUSTCALC_SRC} ${CUSTOM_CALC_FILES} ${CUSTOM_HELP} \
 #
 CALCLIBLIST= ${CUSTCALC_SRC} ${INSTALL_H_SRC} ${MAKE_FILE} HOW_TO_ADD
 
-# This is the custom dynbamic shared library that is build
+# This is the custom dynamic shared library that is build
 #
 CALC_DYNAMIC_LIBCUSTCALC= libcustcalc${LIB_EXT_VERSION}
 
@@ -1155,7 +1155,7 @@ c_sysinfo.o: c_sysinfo.c ${MAKE_FILE}
 
 ###
 #
-# building calc-static and static lib*.a libraires
+# building calc-static and static lib*.a libraries
 #
 ###
 
@@ -1174,7 +1174,7 @@ libcustcalc.a: ${CUSTCALC_OBJ} ${MAKE_FILE}
 # sub-directory called calc/lib.
 #
 # NOTE: Due to bogus shells found on one common system we must have
-#	an non-emoty else clause for every if condition.  *sigh*
+#	an non-empty else clause for every if condition.  *sigh*
 #
 ##
 
@@ -1213,7 +1213,7 @@ Makefile.simple: ${MAKE_FILE}
 # Home grown make dependency rules.  Your system make not support
 # or have the needed tools.  You can ignore this section.
 #
-# We will form a skelaton tree of *.c files containing only #include "foo.h"
+# We will form a skeleton tree of *.c files containing only #include "foo.h"
 # lines and .h files containing the same lines surrounded by multiple include
 # prevention lines.  This allows us to build a static depend list that will
 # satisfy all possible cpp symbol definition combinations.
@@ -1531,7 +1531,7 @@ uninstall:
 	    if [ -f "${T}${CUSTOMCALDIR}/libcustcalc.a" ]; then \
 		echo "cannot uninstall ${T}${CUSTOMCALDIR}/libcustcalc.a"; \
 	    else \
-		echo "uninstalled ${T}${CUSTOMCALDIR}/libcustcalc.a"; \
+		echo "un-installed ${T}${CUSTOMCALDIR}/libcustcalc.a"; \
 	    fi; \
 	fi
 	-${Q} for i in ${CUSTOM_HELP} /dev/null; do \
@@ -1543,7 +1543,7 @@ uninstall:
 		if [ -f "${T}${CUSTOMHELPDIR}/$$i" ]; then \
 		   echo "cannot uninstall ${T}${CUSTOMHELPDIR}/$$i"; \
 		else \
-		   echo "uninstalled ${T}${CUSTOMHELPDIR}/$$i"; \
+		   echo "un-installed ${T}${CUSTOMHELPDIR}/$$i"; \
 		fi; \
 	    fi; \
 	done
@@ -1556,7 +1556,7 @@ uninstall:
 		if [ -f "${T}${CUSTOMCALDIR}/$$i" ]; then \
 		   echo "cannot uninstall ${T}${CUSTOMCALDIR}/$$i"; \
 		else \
-		   echo "uninstalled ${T}${CUSTOMCALDIR}/$$i"; \
+		   echo "un-installed ${T}${CUSTOMCALDIR}/$$i"; \
 		fi; \
 	    fi; \
 	done
@@ -1569,7 +1569,7 @@ uninstall:
 		if [ -f "${T}${CUSTOMINCDIR}/$$i" ]; then \
 		   echo "cannot uninstall ${T}${CUSTOMINCDIR}/$$i"; \
 		else \
-		   echo "uninstalled ${T}${CUSTOMINCDIR}/$$i"; \
+		   echo "un-installed ${T}${CUSTOMINCDIR}/$$i"; \
 		fi; \
 	    fi; \
 	done

custom/Makefile.head

@@ -2,7 +2,7 @@
 #
 # custom - makefile for calc custom routines
 #
-# Copyright (C) 1999-2006,2014,2017  Landon Curt Noll
+# Copyright (C) 1999-2006,2014,2017-2018,2021  Landon Curt Noll
 #
 # Calc is open software; you can redistribute it and/or modify it under
 # the terms of the version 2.1 of the GNU Lesser General Public License
@@ -36,7 +36,7 @@
 #
 #	make ...__optional_arguments_... target=value
 
-# Try uname -s if the target was not alreadhy set on the make command line
+# Try uname -s if the target was not already set on the make command line
 #
 ifeq ($(target),)
 target=$(shell uname -s 2>/dev/null)
@@ -125,7 +125,7 @@ Q=@
 #INCDIR= /dev/env/DJDIR/include
 INCDIR= /usr/include
 
-# where to install calc realted things
+# where to install calc related things
 #
 # ${BINDIR}		where to install calc binary files
 # ${LIBDIR}		where calc link library (*.a) files are installed
@@ -348,7 +348,7 @@ EXT=
 
 # The default calc versions
 #
-VERSION= 2.12.6.5
+VERSION= 2.12.8.2
 
 # Names of shared libraries with versions
 #
@@ -391,7 +391,7 @@ AWK= awk
 # NOTE: These should be left blank in this Makefile to make it
 #       easier to add stuff on the command line.  If you want to
 #	to change the way calc is compiled by this Makefile, change
-#	the appropirate host target section below or a flag above.
+#	the appropriate host target section below or a flag above.
 #
 EXTRA_CFLAGS=
 EXTRA_LDFLAGS=

custom/Makefile.tail

@@ -32,7 +32,7 @@ CUSTCALC_OBJ= ${REQUIRED_OBJ} ${CUSTOM_OBJ}
 #
 C_SRC= ${REQUIRED_SRC} ${CUSTOM_SRC}
 
-# These .h files are used to build the dependecy list
+# These .h files are used to build the dependency list
 #
 H_SRC= ${CUSTOM_H_SRC}
 
@@ -49,7 +49,7 @@ DISTLIST= ${CUSTCALC_SRC} ${CUSTOM_CALC_FILES} ${CUSTOM_HELP} \
 #
 CALCLIBLIST= ${CUSTCALC_SRC} ${INSTALL_H_SRC} ${MAKE_FILE} HOW_TO_ADD
 
-# This is the custom dynbamic shared library that is build
+# This is the custom dynamic shared library that is build
 #
 CALC_DYNAMIC_LIBCUSTCALC= libcustcalc${LIB_EXT_VERSION}
 
@@ -103,7 +103,7 @@ c_sysinfo.o: c_sysinfo.c ${MAKE_FILE}
 
 ###
 #
-# building calc-static and static lib*.a libraires
+# building calc-static and static lib*.a libraries
 #
 ###
 
@@ -122,7 +122,7 @@ libcustcalc.a: ${CUSTCALC_OBJ} ${MAKE_FILE}
 # sub-directory called calc/lib.
 #
 # NOTE: Due to bogus shells found on one common system we must have
-#	an non-emoty else clause for every if condition.  *sigh*
+#	an non-empty else clause for every if condition.  *sigh*
 #
 ##
 
@@ -161,7 +161,7 @@ Makefile.simple: ${MAKE_FILE}
 # Home grown make dependency rules.  Your system make not support
 # or have the needed tools.  You can ignore this section.
 #
-# We will form a skelaton tree of *.c files containing only #include "foo.h"
+# We will form a skeleton tree of *.c files containing only #include "foo.h"
 # lines and .h files containing the same lines surrounded by multiple include
 # prevention lines.  This allows us to build a static depend list that will
 # satisfy all possible cpp symbol definition combinations.
@@ -479,7 +479,7 @@ uninstall:
 	    if [ -f "${T}${CUSTOMCALDIR}/libcustcalc.a" ]; then \
 		echo "cannot uninstall ${T}${CUSTOMCALDIR}/libcustcalc.a"; \
 	    else \
-		echo "uninstalled ${T}${CUSTOMCALDIR}/libcustcalc.a"; \
+		echo "un-installed ${T}${CUSTOMCALDIR}/libcustcalc.a"; \
 	    fi; \
 	fi
 	-${Q} for i in ${CUSTOM_HELP} /dev/null; do \
@@ -491,7 +491,7 @@ uninstall:
 		if [ -f "${T}${CUSTOMHELPDIR}/$$i" ]; then \
 		   echo "cannot uninstall ${T}${CUSTOMHELPDIR}/$$i"; \
 		else \
-		   echo "uninstalled ${T}${CUSTOMHELPDIR}/$$i"; \
+		   echo "un-installed ${T}${CUSTOMHELPDIR}/$$i"; \
 		fi; \
 	    fi; \
 	done
@@ -504,7 +504,7 @@ uninstall:
 		if [ -f "${T}${CUSTOMCALDIR}/$$i" ]; then \
 		   echo "cannot uninstall ${T}${CUSTOMCALDIR}/$$i"; \
 		else \
-		   echo "uninstalled ${T}${CUSTOMCALDIR}/$$i"; \
+		   echo "un-installed ${T}${CUSTOMCALDIR}/$$i"; \
 		fi; \
 	    fi; \
 	done
@@ -517,7 +517,7 @@ uninstall:
 		if [ -f "${T}${CUSTOMINCDIR}/$$i" ]; then \
 		   echo "cannot uninstall ${T}${CUSTOMINCDIR}/$$i"; \
 		else \
-		   echo "uninstalled ${T}${CUSTOMINCDIR}/$$i"; \
+		   echo "un-installed ${T}${CUSTOMINCDIR}/$$i"; \
 		fi; \
 	    fi; \
 	done

custom/c_pmodm127.c

@@ -1,7 +1,7 @@
 /*
  * c_pmodm127 - calculate q mod 2^(2^127-1)
  *
- * Copyright (C) 2004-2007  Landon Curt Noll
+ * Copyright (C) 2004-2007,2021  Landon Curt Noll
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -124,7 +124,7 @@ c_pmodm127(char UNUSED *name, int UNUSED count, VALUE **vals)
 	result.v_type = V_NUM;
 
 	/*
-	 * compute 2^(2^127-1) mod q by modular exponentation
+	 * compute 2^(2^127-1) mod q by modular exponentiation
 	 *
 	 * We implement the following calc code in C:
 	 *

custom/c_pzasusb8.c

@@ -1,7 +1,7 @@
 /*
- * c_pzasusb8 - print numereator as a string of USB8s
+ * c_pzasusb8 - print numerator as a string of USB8s
  *
- * Copyright (C) 1999-2004  Ernest Bowen
+ * Copyright (C) 1999-2004,2021  Ernest Bowen
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -36,7 +36,7 @@
 #include "have_unused.h"
 
 /*
- * c_pzasusb8 - print numereator as a string of USB8s
+ * c_pzasusb8 - print numerator as a string of USB8s
  *
  * given:
  *    count = 1;

custom/c_sysinfo.c

@@ -1,7 +1,7 @@
 /*
  * c_sysinfo - names and values of selected #defines
  *
- * Copyright (C) 1999-2007  Landon Curt Noll
+ * Copyright (C) 1999-2007,2021  Landon Curt Noll
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -173,21 +173,19 @@ STATIC struct infoname sys_info[] = {
      (FULL)MAXSCANCOUNT},
     {"MAXSTACK", "max depth of evaluation stack", NULL,
      (FULL)MAXSTACK},
-    {"MAXSTRING", "max size of string constant", NULL,
-     (FULL)MAXSTRING},
     {"MAXUFULL", "largest FULL value", NULL,
      (FULL)MAXUFULL},
     {"MAXULONG", "largest unsigned long val", NULL,
      (FULL)MAXULONG},
-    {"MAX_MAP_PRIME", "larest prime in pr_map", NULL,
+    {"MAX_MAP_PRIME", "largest prime in pr_map", NULL,
      (FULL)MAX_MAP_PRIME},
-    {"MAX_MAP_VAL", "larest bit in pr_map", NULL,
+    {"MAX_MAP_VAL", "largest bit in pr_map", NULL,
      (FULL)MAX_MAP_VAL},
     {"MAX_PFACT_VAL", "max x, for which pfact(x) is a long", NULL,
      (FULL)MAX_PFACT_VAL},
-    {"MAX_SM_PRIME", "larest 32 bit prime", NULL,
+    {"MAX_SM_PRIME", "largest 32 bit prime", NULL,
      (FULL)MAX_SM_PRIME},
-    {"MAX_SM_VAL", "larest 32 bit value", NULL,
+    {"MAX_SM_VAL", "largest 32 bit value", NULL,
      (FULL)MAX_SM_VAL},
     {"MUL_ALG2", "default size for alternative multiply", NULL,
      (FULL)MUL_ALG2},

custom/custtbl.c

@@ -1,7 +1,7 @@
 /*
  * custtbl - custom interface table
  *
- * Copyright (C) 1999-2007  Landon Curt Noll
+ * Copyright (C) 1999-2007,2021  Landon Curt Noll
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -40,7 +40,7 @@
 
 
 /*
- * add your forward custom function declaractions here
+ * add your forward custom function declarations here
  *
  * Declare custom functions as follows:
  *

custom/devnull

@@ -10,7 +10,7 @@ TYPES
     return	null
 
 DESCRIPTION
-    This custom function does nothing.	It is intented for testing
+    This custom function does nothing.	It is intended for testing
     of the general custom interface.
 
 EXAMPLE
@@ -26,7 +26,7 @@ LIBRARY
 SEE ALSO
     custom
 
-## Copyright (C) 1999  Landon Curt Noll
+## Copyright (C) 1999,2021  Landon Curt Noll
 ##
 ## Calc is open software; you can redistribute it and/or modify it under
 ## the terms of the version 2.1 of the GNU Lesser General Public License

custom/pmodm127

@@ -25,7 +25,7 @@ DESCRIPTION
     SPECIAL NOTE:
 
 	Can you find a value, q, for which this custom function returns 1?
-	If you do, send the value of q to chongo using the EMail address
+	If you do, send the value of q to chongo using the Email address
 	found at:
 
 	    http://www.isthe.com/chongo/address.html
@@ -51,7 +51,7 @@ LIBRARY
 SEE ALSO
     custom
 
-## Copyright (C) 2004  Landon Curt Noll
+## Copyright (C) 2004,2021  Landon Curt Noll
 ##
 ## Calc is open software; you can redistribute it and/or modify it under
 ## the terms of the version 2.1 of the GNU Lesser General Public License

custom/pzasusb8

@@ -21,7 +21,7 @@ DESCRIPTION
 
     for details.
 
-    This custom function is intented for testing of the general
+    This custom function is intended for testing of the general
     custom interface.
 
 EXAMPLE
@@ -49,7 +49,7 @@ LIBRARY
 SEE ALSO
     custom
 
-## Copyright (C) 1999  Landon Curt Noll
+## Copyright (C) 1999,2021  Landon Curt Noll
 ##
 ## Calc is open software; you can redistribute it and/or modify it under
 ## the terms of the version 2.1 of the GNU Lesser General Public License

custom/pzasusb8.cal

@@ -1,7 +1,7 @@
 /*
- * pzasusb8 - print numereator as a string of USB8s
+ * pzasusb8 - print numerator as a string of USB8s
  *
- * Copyright (C) 1999,2004  Ernest Bowen and Landon Curt Noll
+ * Copyright (C) 1999,2004,2021  Ernest Bowen and Landon Curt Noll
  *
  * Primary author:  Ernest Bowen
  *

custom/register

@@ -20,14 +20,14 @@ DESCRIPTION
 
     The number of custom registers is defined at compile time.
     There will be at least 32 registers although there could be more
-    added in the future.  It may be deterimed by:
+    added in the future.  It may be determined by:
 
 		custom("sysinfo", "REGNUM_MAX")
 
     The custom registers are initialized to 0 by the internal
     function libcalc_call_me_first() during calc startup.
 
-    This custom interface is intented to make it easier to interface
+    This custom interface is intended to make it easier to interface
     with special purpose hardware.
 
 EXAMPLE
@@ -46,7 +46,7 @@ EXAMPLE
 LIMITS
     calc must be built with ALLOW_CUSTOM= -DCUSTOM
     calc must be executed with a -C arg.
-    The regnum numbe bee an integer >= 0 and < REGNUM_MAX where
+    The regnum number bee an integer >= 0 and < REGNUM_MAX where
         REGNUM_MAX is a compile time constant that is >= 32.
 
 LIBRARY
@@ -55,7 +55,7 @@ LIBRARY
 SEE ALSO
     custom
 
-## Copyright (C) 2007  Landon Curt Noll
+## Copyright (C) 2007,2021  Landon Curt Noll
 ##
 ## Calc is open software; you can redistribute it and/or modify it under
 ## the terms of the version 2.1 of the GNU Lesser General Public License

custom/sysinfo

@@ -13,7 +13,7 @@ DESCRIPTION
 
     This custom function will return the value certain selected #define
     values.  The infoname arg must be a string that matches the given
-    #define name.  For conveience, the case infoname does not matter,
+    #define name.  For convenience, the case infoname does not matter,
     so "baseb" and "BASEB" refer to the same #define value.
 
     The return value is either an integer or a string depending on
@@ -53,7 +53,7 @@ LIBRARY
 SEE ALSO
     custom
 
-## Copyright (C) 1999  Landon Curt Noll
+## Copyright (C) 1999,2021  Landon Curt Noll
 ##
 ## Calc is open software; you can redistribute it and/or modify it under
 ## the terms of the version 2.1 of the GNU Lesser General Public License

endian.c

@@ -1,7 +1,7 @@
 /*
  * endian - determine the byte order of a long on your machine
  *
- * Copyright (C) 1999-2013  Landon Curt Noll
+ * Copyright (C) 1999-2013,2021  Landon Curt Noll
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -25,7 +25,7 @@
  */
 
 /*
- * Big Endian:	    Amdahl, 68k, Pyramid, Mips, Sparc, ...
+ * Big Endian:	    Amdahl, 68k, Pyramid, MIPS, Sparc, ...
  * Little Endian:   Vax, 32k, Spim (Dec Mips), i386, i486, ...
  */
 

file.c

@@ -1,7 +1,7 @@
 /*
  * file - file I/O routines callable by users
  *
- * Copyright (C) 1999-2007  David I. Bell and Landon Curt Noll
+ * Copyright (C) 1999-2007,2018,2021  David I. Bell and Landon Curt Noll
  *
  * Primary author:  David I. Bell
  *
@@ -50,6 +50,8 @@
 
 #define READSIZE	1024	/* buffer size for reading */
 
+#define MIN(a,b) (((a) <= (b)) ? (a) : (b))
+
 /*
  * external STDIO functions
  */
@@ -97,7 +99,7 @@ S_FUNC void fskipnum(FILE *fp);
 
 
 /*
- * file_init - perform needed initilization work
+ * file_init - perform needed initialization work
  *
  * On some systems, one cannot initialize a pointer to a FILE *.
  * This routine, called once at startup is a work-a-round for
@@ -143,6 +145,7 @@ file_init(void)
 		 * stat the descriptor to see what we have
 		 */
 		if (fstat(i, &sbuf) >= 0) {
+			size_t snprintf_len;	/* malloced snprintf length */
 			fp = (FILE *) fdopen(i,"r+");	/*guess mode*/
 			if (fp) {
 				strcpy(files[idnum].mode, "r+");
@@ -161,12 +164,15 @@ file_init(void)
 						continue;
 				}
 			}
-			tname = (char *)malloc(sizeof("descriptor[19]"));
+			snprintf_len =
+			  sizeof("descriptor[12345678901234567890]") + 1;
+			tname = (char *)malloc(snprintf_len+1);
 			if (tname == NULL) {
 				math_error("Out of memory for init_file");
 				/*NOTREACHED*/
 			}
-			sprintf(tname, "descriptor[%d]", i);
+			snprintf(tname, snprintf_len, "descriptor[%d]", i);
+			tname[snprintf_len] = '\0';	/* paranoia */
 			files[idnum].name = tname;
 			files[idnum].id = idnum;
 			files[idnum].fp = fp;
@@ -234,7 +240,7 @@ init_fileio(FILEIO *fiop, char *name, char *mode,
 	 * determine file open mode
 	 *
 	 * While a leading 'r' is for reading and a leading 'w' is
-	 * for writing, the presense of a '+' in the string means
+	 * for writing, the presence of a '+' in the string means
 	 * both reading and writing.  A leading 'a' means append
 	 * which is writing.
 	 */
@@ -1017,6 +1023,7 @@ idprintf(FILEID id, char *fmt, int count, VALUE **vals)
 		switch (ch) {
 		case 's':
 			printstring = TRUE;
+			/*FALLTHRU*/
 		case 'c':
 			printchar = TRUE;
 		case 'd':
@@ -1027,6 +1034,9 @@ idprintf(FILEID id, char *fmt, int count, VALUE **vals)
 		case 'e':
 			newmode = MODE_EXP;
 			break;
+		case 'g':
+			newmode = MODE_REAL_AUTO;
+			break;
 		case 'r':
 			newmode = MODE_FRAC;
 			break;
@@ -1398,7 +1408,7 @@ z2filepos(ZVALUE zpos)
 	/*
 	 * firewall
 	 */
-	zpos.sign = 0;	/* deal only with the absolue value */
+	zpos.sign = 0;	/* deal only with the absolute value */
 
 	/*
 	 * quick return if the position can fit into a long
@@ -1406,23 +1416,22 @@ z2filepos(ZVALUE zpos)
 #if FILEPOS_BITS == FULL_BITS
 	/* ztofull puts the value into native byte order */
 	pos = ztofull(zpos);
-	/* on some hosts, FILEPOS is not a scalar */
+	memset(&ret, 0, sizeof(ret));	/* FILEPOS could be non-scalar */
-	memset(&ret, 0, sizeof(FILEPOS));
+	memcpy((void *)&ret, (void *)&pos, MIN(sizeof(ret), sizeof(pos)));
-	memcpy((void *)&ret, (void *)&pos, sizeof(FILEPOS));
 	return ret;
 #elif FILEPOS_BITS < FULL_BITS
 	/* ztofull puts the value into native byte order */
 	pos = ztolong(zpos);
-	/* on some hosts, FILEPOS is not a scalar */
+	memset(&ret, 0, sizeof(ret));	/* FILEPOS could be non-scalar */
-	memset(&ret, 0, sizeof(FILEPOS));
+	memcpy((void *)&ret, (void *)&pos, MIN(sizeof(ret), sizeof(pos)));
-	memcpy((void *)&ret, (void *)&pos, sizeof(pos));
 	return ret;
 #else /* FILEPOS_BITS > FULL_BITS */
 	if (!zgtmaxfull(zpos)) {
 		/* ztofull puts the value into native byte order */
 		pos = ztofull(zpos);
-		memset(&ret, 0, sizeof(FILEPOS));
+		memset(&ret, 0, sizeof(ret)); /* FILEPOS could be non-scalar */
-		memcpy((void *)&ret, (void *)&pos, sizeof(pos));
+		memcpy((void *)&ret, (void *)&pos,
+				     MIN(sizeof(ret), sizeof(pos)));
 		return ret;
 	}
 
@@ -1431,11 +1440,13 @@ z2filepos(ZVALUE zpos)
 	 */
 	if (zpos.len >= FILEPOS_BITS/BASEB) {
 		/* copy the lower FILEPOS_BITS of the ZVALUE */
-		memcpy(&tmp, zpos.v, sizeof(FILEPOS));
+		memset(&tmp, 0, sizeof(tmp)); /* FILEPOS could be non-scalar */
+		memcpy(&tmp, zpos.v, MIN(sizeof(tmp), FILEPOS_LEN);
 	} else {
 		/* copy what bits we can into the temp value */
-		memset(&tmp, 0, sizeof(FILEPOS));
+		memset(&tmp, 0, sizeof(tmp)); /* FILEPOS could be non-scalar */
-		memcpy(&tmp, zpos.v, zpos.len*BASEB/8);
+		memcpy(&tmp, zpos.v, MIN(sizeof(tmp),
+			     MIN(zpos.len*BASEB/8, FILEPOS_LEN)));
 	}
 	/* swap into native byte order */
 	SWAP_HALF_IN_FILEPOS(&ret, &tmp);
@@ -1638,7 +1649,7 @@ set_open_pos(FILE *fp, ZVALUE zpos)
 	}
 
 	/*
-	 * return sucess
+	 * return success
 	 */
 	return 0;
 }
@@ -2595,7 +2606,7 @@ isattyid(FILEID id)
  * given:
  *	id	FILEID to search
  *	str	string to look for
- *	pos	file postion to start at (NULL => current position)
+ *	pos	file position to start at (NULL => current position)
  *
  * returns:
  *	EOF if system error
@@ -2605,7 +2616,7 @@ isattyid(FILEID id)
  *
  * XXX - This search is a translation of the original search that did not
  *	 work with large files.	 The search algorithm used is slow and
- *	 should be spead up much more.
+ *	 should be speed up much more.
  */
 int
 fsearch(FILEID id, char *str, ZVALUE start, ZVALUE end, ZVALUE *res)

file.h

@@ -1,7 +1,7 @@
 /*
  * file - file I/O routines callable by users
  *
- * Copyright (C) 1999-2007,2014  David I. Bell and Landon Curt Noll
+ * Copyright (C) 1999-2007,2014,2021  David I. Bell and Landon Curt Noll
  *
  * Primary author:  David I. Bell
  *
@@ -63,7 +63,7 @@ typedef struct {
  *	Seek loc bytes from the beginning of the open file, stream.
  *
  * f_tell(FILE *stream, FILEPOS *loc)
- *	Set loc to bytes from the beinning of the open file, stream.
+ *	Set loc to bytes from the beginning of the open file, stream.
  *
  * We assume that if your system does not have fgetpos/fsetpos,
  * then it will have a FILEPOS that is a scalar type (e.g., long).

fposval.c

@@ -1,7 +1,7 @@
 /*
  * fposval - Determine information about the file position type
  *
- * Copyright (C) 1999  Landon Curt Noll
+ * Copyright (C) 1999,2021  Landon Curt Noll
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -122,10 +122,11 @@ main(int argc, char **argv)
 #else /* HAVE_FILEPOS_SCALAR */
 	/*
 	 * Normally a "(*(dest) = *(src))" would do, but on some
-	 * systems a FILEPOS is not a scalar hince we must memcpy.
+	 * systems a FILEPOS is not a scalar hence we must memcpy.
 	 */
 	printf("#define SWAP_HALF_IN_FILEPOS(dest, src)\t%s\n",
-	    "memcpy((void *)(dest), (void *)(src), sizeof(FPOS_POS_LEN))");
+	    "\\\n\tmemcpy((void *)(dest), (void *)(src), "
+	    "sizeof(FPOS_POS_LEN))");
 #endif /* HAVE_FILEPOS_SCALAR */
 #endif /* CALC_BYTE_ORDER == BIG_ENDIAN */
 	putchar('\n');
@@ -162,7 +163,7 @@ main(int argc, char **argv)
 	 * Little Endian
 	 *
 	 * Normally a "(*(dest) = *(src))" would do, but on some
-	 * systems an off_t is not a scalar hince we must memcpy.
+	 * systems an off_t is not a scalar hence we must memcpy.
 	 */
 #if defined(HAVE_OFF_T_SCALAR)
 	printf("#define SWAP_HALF_IN_OFF_T(dest, src)\t\t%s\n",
@@ -170,7 +171,7 @@ main(int argc, char **argv)
 #else /* HAVE_OFF_T_SCALAR */
 	/*
 	 * Normally a "(*(dest) = *(src))" would do, but on some
-	 * systems, a off_t is not a scalar hince we must memcpy.
+	 * systems, a off_t is not a scalar hence we must memcpy.
 	 */
 	printf("#define SWAP_HALF_IN_OFF_T(dest, src)\t%s%d%s\n",
 	    "memcpy((void *)(dest), (void *)(src), ", stsizelen/8, ")");
@@ -213,7 +214,7 @@ main(int argc, char **argv)
 	 * Little Endian
 	 *
 	 * Normally a "(*(dest) = *(src))" would do, but on some
-	 * systems, a DEV is not a scalar hince we must memcpy.
+	 * systems, a DEV is not a scalar hence we must memcpy.
 	 */
 	printf("#define SWAP_HALF_IN_DEV(dest, src)\t%s%d%s\n",
 	    "memcpy((void *)(dest), (void *)(src), ", devlen/8, ")");
@@ -255,7 +256,7 @@ main(int argc, char **argv)
 	 * Little Endian
 	 *
 	 * Normally a "(*(dest) = *(src))" would do, but on some
-	 * systems, a INODE is not a scalar hince we must memcpy.
+	 * systems, a INODE is not a scalar hence we must memcpy.
 	 */
 	printf("#define SWAP_HALF_IN_INODE(dest, src)\t%s%d%s\n",
 	    "memcpy((void *)(dest), (void *)(src), ", inodelen/8, ")");

func.c

@@ -1,7 +1,8 @@
 /*
  * func - built-in functions implemented here
  *
- * Copyright (C) 1999-2007  David I. Bell, Landon Curt Noll and Ernest Bowen
+ * Copyright (C) 1999-2007,2018,2021  David I. Bell, Landon Curt Noll
+ *				      and Ernest Bowen
  *
  * Primary author:  David I. Bell
  *
@@ -268,7 +269,22 @@ f_prompt(VALUE *vp)
 		math_error("Cannot allocate string");
 		/*NOTREACHED*/
 	}
-	strncpy(newcp, cp, len+1);
+	/*
+	 * The next statement could be::
+	 *
+	 *	strncpy(newcp, cp, len);
+	 *
+	 * however compilers like gcc would issue warnings such as:
+	 *
+	 * 	specified bound depends on the length of the
+	 * 	source argument
+	 *
+	 * even though we terminate the string by setting a NUL
+	 * byte following the copy.  Therefore we call memcpy()
+	 * instead to avoid such warnings.
+	 */
+	memcpy(newcp, cp, len);
+	newcp[len] = '\0';
 	result.v_str = makestring(newcp);
 	return result;
 }
@@ -335,7 +351,7 @@ f_str(VALUE *vp)
 		break;
 	case V_NUM:
 		math_divertio();
-		qprintnum(vp->v_num, MODE_DEFAULT);
+		qprintnum(vp->v_num, MODE_DEFAULT, conf->outdigits);
 		cp = math_getdivertedio();
 		result.v_str = makestring(cp);
 		break;
@@ -2122,6 +2138,9 @@ f_log(int count, VALUE **vals)
 		default:
 			return error_value(E_LOG2);
 	}
+	if (c == NULL) {
+		return error_value(E_LOG3);
+	}
 	result.v_type = V_COM;
 	result.v_com = c;
 	if (cisreal(c)) {
@@ -2239,8 +2258,15 @@ f_tan(int count, VALUE **vals)
 		case V_COM:
 			tmp1.v_type = V_COM;
 			tmp1.v_com = c_sin(vals[0]->v_com, err);
+			if (tmp1.v_com == NULL) {
+				return error_value(E_TAN3);
+			}
 			tmp2.v_type = V_COM;
 			tmp2.v_com = c_cos(vals[0]->v_com, err);
+			if (tmp2.v_com == NULL) {
+				comfree(tmp1.v_com);
+				return error_value(E_TAN4);
+			}
 			divvalue(&tmp1, &tmp2, &result);
 			comfree(tmp1.v_com);
 			comfree(tmp2.v_com);
@@ -2276,6 +2302,9 @@ f_sec(int count, VALUE **vals)
 		case V_COM:
 			tmp.v_type = V_COM;
 			tmp.v_com = c_cos(vals[0]->v_com, err);
+			if (tmp.v_com == NULL) {
+				return error_value(E_SEC3);
+			}
 			invertvalue(&tmp, &result);
 			comfree(tmp.v_com);
 			break;
@@ -2314,8 +2343,15 @@ f_cot(int count, VALUE **vals)
 		case V_COM:
 			tmp1.v_type = V_COM;
 			tmp1.v_com = c_cos(vals[0]->v_com, err);
+			if (tmp1.v_com == NULL) {
+				return error_value(E_COT3);
+			}
 			tmp2.v_type = V_COM;
 			tmp2.v_com = c_sin(vals[0]->v_com, err);
+			if (tmp2.v_com == NULL) {
+				comfree(tmp1.v_com);
+				return error_value(E_COT4);
+			}
 			divvalue(&tmp1, &tmp2, &result);
 			comfree(tmp1.v_com);
 			comfree(tmp2.v_com);
@@ -2354,6 +2390,9 @@ f_csc(int count, VALUE **vals)
 		case V_COM:
 			tmp.v_type = V_COM;
 			tmp.v_com = c_sin(vals[0]->v_com, err);
+			if (tmp.v_com == NULL) {
+				return error_value(E_CSC3);
+			}
 			invertvalue(&tmp, &result);
 			comfree(tmp.v_com);
 			break;
@@ -2476,8 +2515,15 @@ f_tanh(int count, VALUE **vals)
 		case V_COM:
 			tmp1.v_type = V_COM;
 			tmp1.v_com = c_sinh(vals[0]->v_com, err);
+			if (tmp1.v_com == NULL) {
+				return error_value(E_TANH3);
+			}
 			tmp2.v_type = V_COM;
 			tmp2.v_com = c_cosh(vals[0]->v_com, err);
+			if (tmp2.v_com == NULL) {
+				comfree(tmp1.v_com);
+				return error_value(E_TANH4);
+			}
 			divvalue(&tmp1, &tmp2, &result);
 			comfree(tmp1.v_com);
 			comfree(tmp2.v_com);
@@ -2517,8 +2563,15 @@ f_coth(int count, VALUE **vals)
 		case V_COM:
 			tmp1.v_type = V_COM;
 			tmp1.v_com = c_cosh(vals[0]->v_com, err);
+			if (tmp1.v_com == NULL) {
+				return error_value(E_COTH3);
+			}
 			tmp2.v_type = V_COM;
 			tmp2.v_com = c_sinh(vals[0]->v_com, err);
+			if (tmp2.v_com == NULL) {
+				comfree(tmp1.v_com);
+				return error_value(E_COTH4);
+			}
 			divvalue(&tmp1, &tmp2, &result);
 			comfree(tmp1.v_com);
 			comfree(tmp2.v_com);
@@ -2555,6 +2608,9 @@ f_sech(int count, VALUE **vals)
 		case V_COM:
 			tmp.v_type = V_COM;
 			tmp.v_com = c_cosh(vals[0]->v_com, err);
+			if (tmp.v_com == NULL) {
+				return error_value(E_SECH3);
+			}
 			invertvalue(&tmp, &result);
 			comfree(tmp.v_com);
 			break;
@@ -2592,6 +2648,9 @@ f_csch(int count, VALUE **vals)
 		case V_COM:
 			tmp.v_type = V_COM;
 			tmp.v_com = c_sinh(vals[0]->v_com, err);
+			if (tmp.v_com == NULL) {
+				return error_value(E_CSCH3);
+			}
 			invertvalue(&tmp, &result);
 			comfree(tmp.v_com);
 			break;
@@ -2626,7 +2685,7 @@ f_atan(int count, VALUE **vals)
 		case V_COM:
 			tmp = c_atan(vals[0]->v_com, err);
 			if (tmp == NULL)
-				return error_value(E_LOGINF);
+				return error_value(E_ATAN3);
 			result.v_type = V_COM;
 			result.v_com = tmp;
 			if (cisreal(tmp)) {
@@ -2666,7 +2725,7 @@ f_acot(int count, VALUE **vals)
 		case V_COM:
 			tmp = c_acot(vals[0]->v_com, err);
 			if (tmp == NULL)
-				return error_value(E_LOGINF);
+				return error_value(E_ACOT3);
 			result.v_type = V_COM;
 			result.v_com = tmp;
 			if (cisreal(tmp)) {
@@ -2718,6 +2777,9 @@ f_asin(int count, VALUE **vals)
 		default:
 			return error_value(E_ASIN2);
 	}
+	if (result.v_com == NULL) {
+		return error_value(E_ASIN3);
+	}
 	if (result.v_type == V_COM && cisreal(result.v_com)) {
 		q = qlink(result.v_com->real);
 		comfree(result.v_com);
@@ -2764,6 +2826,9 @@ f_acos(int count, VALUE **vals)
 		default:
 			return error_value(E_ACOS2);
 	}
+	if (result.v_com == NULL) {
+		return error_value(E_ACOS3);
+	}
 	if (result.v_type == V_COM && cisreal(result.v_com)) {
 		q = qlink(result.v_com->real);
 		comfree(result.v_com);
@@ -2794,7 +2859,7 @@ f_asec(int count, VALUE **vals)
 	switch (vals[0]->v_type) {
 		case V_NUM:
 			if (qiszero(vals[0]->v_num))
-				return error_value(E_LOGINF);
+				return error_value(E_ASEC3);
 			result.v_num = qasec(vals[0]->v_num, err);
 			result.v_type = V_NUM;
 			if (result.v_num == NULL) {
@@ -2813,9 +2878,10 @@ f_asec(int count, VALUE **vals)
 		default:
 			return error_value(E_ASEC2);
 	}
+	if (result.v_com == NULL) {
+		return error_value(E_ASEC3);
+	}
 	if (result.v_type == V_COM) {
-		if (result.v_com == NULL)
-			return error_value(E_LOGINF);
 		if (cisreal(result.v_com)) {
 			q = qlink(result.v_com->real);
 			comfree(result.v_com);
@@ -2847,7 +2913,7 @@ f_acsc(int count, VALUE **vals)
 	switch (vals[0]->v_type) {
 		case V_NUM:
 			if (qiszero(vals[0]->v_num))
-				return error_value(E_LOGINF);
+				return error_value(E_ACSC3);
 			result.v_num = qacsc(vals[0]->v_num, err);
 			result.v_type = V_NUM;
 			if (result.v_num == NULL) {
@@ -2866,9 +2932,10 @@ f_acsc(int count, VALUE **vals)
 		default:
 			return error_value(E_ACSC2);
 	}
+	if (result.v_com == NULL) {
+		return error_value(E_ACSC3);
+	}
 	if (result.v_type == V_COM) {
-		if (result.v_com == NULL)
-			return error_value(E_LOGINF);
 		if (cisreal(result.v_com)) {
 			q = qlink(result.v_com->real);
 			comfree(result.v_com);
@@ -2903,6 +2970,9 @@ f_asinh(int count, VALUE **vals)
 			break;
 		case V_COM:
 			tmp = c_asinh(vals[0]->v_com, err);
+			if (tmp == NULL) {
+				return error_value(E_ASINH3);
+			}
 			result.v_type = V_COM;
 			result.v_com = tmp;
 			if (cisreal(tmp)) {
@@ -2955,6 +3025,9 @@ f_acosh(int count, VALUE **vals)
 		default:
 			return error_value(E_ACOSH2);
 	}
+	if (result.v_com == NULL) {
+		return error_value(E_ACOSH3);
+	}
 	if (result.v_type == V_COM && cisreal(result.v_com)) {
 		q = qlink(result.v_com->real);
 		comfree(result.v_com);
@@ -3002,9 +3075,10 @@ f_atanh(int count, VALUE **vals)
 		default:
 			return error_value(E_ATANH2);
 	}
+	if (result.v_com == NULL) {
+		return error_value(E_ATANH3);
+	}
 	if (result.v_type == V_COM) {
-		if (result.v_com == NULL)
-			return error_value(E_LOGINF);
 		if (cisreal(result.v_com)) {
 			q = qlink(result.v_com->real);
 			comfree(result.v_com);
@@ -3053,9 +3127,10 @@ f_acoth(int count, VALUE **vals)
 		default:
 			return error_value(E_ACOTH2);
 	}
+	if (result.v_com == NULL) {
+		return error_value(E_ACOTH3);
+	}
 	if (result.v_type == V_COM) {
-		if (result.v_com == NULL)
-			return error_value(E_LOGINF);
 		if (cisreal(result.v_com)) {
 			q = qlink(result.v_com->real);
 			comfree(result.v_com);
@@ -3087,7 +3162,7 @@ f_asech(int count, VALUE **vals)
 	switch (vals[0]->v_type) {
 		case V_NUM:
 			if (qiszero(vals[0]->v_num))
-				return error_value(E_LOGINF);
+				return error_value(E_ASECH3);
 			result.v_num = qasech(vals[0]->v_num, err);
 			result.v_type = V_NUM;
 			if (result.v_num == NULL) {
@@ -3106,9 +3181,10 @@ f_asech(int count, VALUE **vals)
 		default:
 			return error_value(E_ASECH2);
 	}
+	if (result.v_com == NULL) {
+		return error_value(E_ASECH3);
+	}
 	if (result.v_type == V_COM) {
-		if (result.v_com == NULL)
-			return error_value(E_LOGINF);
 		if (cisreal(result.v_com)) {
 			q = qlink(result.v_com->real);
 			comfree(result.v_com);
@@ -3140,7 +3216,7 @@ f_acsch(int count, VALUE **vals)
 	switch (vals[0]->v_type) {
 		case V_NUM:
 			if (qiszero(vals[0]->v_num))
-				return error_value(E_LOGINF);
+				return error_value(E_ACSCH3);
 			result.v_num = qacsch(vals[0]->v_num, err);
 			result.v_type = V_NUM;
 			if (result.v_num == NULL) {
@@ -3159,9 +3235,10 @@ f_acsch(int count, VALUE **vals)
 		default:
 			return error_value(E_ACSCH2);
 	}
+	if (result.v_com == NULL) {
+		return error_value(E_ACSCH3);
+	}
 	if (result.v_type == V_COM) {
-		if (result.v_com == NULL)
-			return error_value(E_LOGINF);
 		if (cisreal(result.v_com)) {
 			q = qlink(result.v_com->real);
 			comfree(result.v_com);
@@ -3260,7 +3337,7 @@ f_agd(int count, VALUE **vals)
 			return error_value(E_AGD2);
 	}
 	if (result.v_com == NULL)
-			return error_value(E_AGD3);
+		return error_value(E_AGD3);
 	if (cisreal(result.v_com)) {
 		q = qlink(result.v_com->real);
 		comfree(result.v_com);
@@ -5461,7 +5538,7 @@ f_usertime(void)
 	NUMBER *secret;			/* whole sconds of CPU time to return */
 	NUMBER *usecret;		/* microseconds of CPU time to return */
 
-	/* get the resource informaion for ourself */
+	/* get the resource information for ourself */
 	status = getrusage(who, &usage);
 	if (status < 0) {
 	    /* system call error, so return 0 */
@@ -5500,7 +5577,7 @@ f_systime(void)
 	NUMBER *secret;			/* whole sconds of CPU time to return */
 	NUMBER *usecret;		/* microseconds of CPU time to return */
 
-	/* get the resource informaion for ourself */
+	/* get the resource information for ourself */
 	status = getrusage(who, &usage);
 	if (status < 0) {
 	    /* system call error, so return 0 */
@@ -5540,7 +5617,7 @@ f_runtime(void)
 	NUMBER *secret;			/* whole sconds of CPU time to return */
 	NUMBER *usecret;		/* microseconds of CPU time to return */
 
-	/* get the resource informaion for ourself */
+	/* get the resource information for ourself */
 	status = getrusage(who, &usage);
 	if (status < 0) {
 	    /* system call error, so return 0 */
@@ -5657,7 +5734,7 @@ f_fpathopen(int count, VALUE **vals)
 	/* initialize VALUE */
 	result.v_subtype = V_NOSUBTYPE;
 
-	/* check for valid strongs */
+	/* check for valid strong */
 	if (vals[0]->v_type != V_STR || vals[1]->v_type != V_STR) {
 		return error_value(E_FPATHOPEN1);
 	}
@@ -6022,12 +6099,15 @@ f_strerror(int count, VALUE **vals)
 	/* firewall - return generic error string if it is not assigned */
 	if (i >= nexterrnum || (i > E__HIGHEST && i < E_USERDEF)
 			|| (i < E__BASE && strerror(i) == NULL)) {
-		cp = (char *) malloc(sizeof("Error 1234567890")+1);
+		size_t snprintf_len;	/* malloced snprintf buffer length */
+		snprintf_len = sizeof("Unknown error 12345678901234567890")+1;
+		cp = (char *) malloc(snprintf_len+1);
 		if (cp == NULL) {
 			math_error("Out of memory for strerror");
 			/*NOTREACHED*/
 		}
-		sprintf(cp, "Unknown error %ld", i);
+		snprintf(cp, snprintf_len, "Unknown error %ld", i);
+		cp[snprintf_len] = '\0';	/* paranoia */
 		result.v_str = makestring(cp);
 		return result;
 	}
@@ -7382,7 +7462,26 @@ f_cmdbuf(void)
 
 	cmdbuf_len = strlen(cmdbuf);
 	newcp = (char *)malloc(cmdbuf_len+1);
-	strncpy(newcp, cmdbuf, cmdbuf_len+1);
+	if (newcp == NULL) {
+		math_error("Cannot allocate string in cmdbuf");
+		/*NOTREACHED*/
+	}
+	/*
+	 * The next statement could be::
+	 *
+	 *	strncpy(newcp, cmdbuf, cmdbuf_len);
+	 *
+	 * however compilers like gcc would issue warnings such as:
+	 *
+	 * 	specified bound depends on the length of the
+	 * 	source argument
+	 *
+	 * even though we terminate the string by setting a NUL
+	 * byte following the copy.  Therefore we call memcpy()
+	 * instead to avoid such warnings.
+	 */
+	memcpy(newcp, cmdbuf, cmdbuf_len);
+	newcp[cmdbuf_len] = '\0';
 	result.v_str = makestring(newcp);
 	return result;
 }
@@ -7550,6 +7649,8 @@ f_putenv(int count, VALUE **vals)
 	 * parse args
 	 */
 	if (count == 2) {
+		size_t snprintf_len;	/* malloced snprintf buffer length */
+
 		/* firewall */
 		if (vals[0]->v_type != V_STR || vals[1]->v_type != V_STR) {
 			math_error("Non-string argument for putenv");
@@ -7557,15 +7658,36 @@ f_putenv(int count, VALUE **vals)
 		}
 
 		/* convert putenv("foo","bar") into putenv("foo=bar") */
-		putenv_str = (char *)malloc(vals[0]->v_str->s_len + 1 +
+		snprintf_len = vals[0]->v_str->s_len + 1 +
-			    vals[1]->v_str->s_len + 1);
+                               vals[1]->v_str->s_len;
+		putenv_str = (char *)malloc(snprintf_len+1);
 		if (putenv_str == NULL) {
 			math_error("Cannot allocate string in putenv");
 			/*NOTREACHED*/
 		}
-		sprintf(putenv_str, "%s=%s", vals[0]->v_str->s_str,
+		/*
-			vals[1]->v_str->s_str);
+		 * The next statement could be::
-
+		 *
+		 *	snprintf(putenv_str, snprintf_len,
+		 *	        "%s=%s", vals[0]->v_str->s_str,
+		 *	        vals[1]->v_str->s_str);
+		 *
+		 * however compilers like gcc would issue warnings such as:
+		 *
+		 * 	null destination pointer
+		 *
+		 * even though we check that putenv_str is non-NULL
+		 * above before using it.  Therefore we call memcpy()
+		 * twice and make an assignment instead to avoid such warnings.
+		 */
+		memcpy(putenv_str,
+		       vals[0]->v_str->s_str,
+		       vals[0]->v_str->s_len);
+		putenv_str[vals[0]->v_str->s_len] = '=';
+		memcpy(putenv_str + vals[0]->v_str->s_len + 1,
+		       vals[1]->v_str->s_str,
+		       vals[1]->v_str->s_len);
+		putenv_str[snprintf_len] = '\0';
 
 	} else {
 		/* firewall */
@@ -7589,8 +7711,9 @@ f_putenv(int count, VALUE **vals)
 			math_error("Cannot allocate string in putenv");
 			/*NOTREACHED*/
 		}
-		strncpy(putenv_str, vals[0]->v_str->s_str,
+		memcpy(putenv_str, vals[0]->v_str->s_str,
-			vals[0]->v_str->s_len + 1);
+				   vals[0]->v_str->s_len);
+		putenv_str[vals[0]->v_str->s_len] = '\0';
 	}
 
 	/* return putenv result */
@@ -7717,7 +7840,7 @@ f_base(int count, NUMBER **vals)
 		return base_value(conf->outmode, conf->outmode);
 	}
 
-	/* deal with the specal modes first */
+	/* deal with the special modes first */
 	if (qisfrac(vals[0])) {
 		return base_value(math_setmode(MODE_FRAC), conf->outmode);
 	}
@@ -7768,7 +7891,7 @@ f_base2(int count, NUMBER **vals)
 		return base_value(conf->outmode2, conf->outmode2);
 	}
 
-	/* deal with the specal modes first */
+	/* deal with the special modes first */
 	if (qisfrac(vals[0])) {
 		return base_value(math_setmode2(MODE_FRAC), conf->outmode2);
 	}
@@ -8388,7 +8511,7 @@ f_version(void)
 {
 	VALUE result;
 
-	/* return the calc verstion string */
+	/* return the calc version string */
 	result.v_type = V_STR;
 	result.v_subtype = V_NOSUBTYPE;
 	result.v_str = makestring(strdup(version()));
@@ -8454,7 +8577,7 @@ STATIC CONST struct builtin builtins[] = {
 	{"acsch", 1, 2, 0, OP_NOP, 0, f_acsch,
 	 "inverse csch of a within accuracy b"},
 	{"agd", 1, 2, 0, OP_NOP, 0, f_agd,
-	 "inverse gudermannian function"},
+	 "inverse Gudermannian function"},
 	{"append", 1, IN, FA, OP_NOP, 0, f_listappend,
 	 "append values to end of list"},
 	{"appr", 1, 3, 0, OP_NOP, 0, f_appr,
@@ -8665,7 +8788,7 @@ STATIC CONST struct builtin builtins[] = {
 	{"gcdrem", 2, 2, 0, OP_NOP, qgcdrem, 0,
 	 "a divided repeatedly by gcd with b"},
 	{"gd", 1, 2, 0, OP_NOP, 0, f_gd,
-	 "gudermannian function"},
+	 "Gudermannian function"},
 	{"getenv", 1, 1, 0, OP_NOP, 0, f_getenv,
 	 "value of environment variable (or NULL)"},
 	{"hash", 1, IN, 0, OP_NOP, 0, f_hash,
@@ -8945,7 +9068,7 @@ STATIC CONST struct builtin builtins[] = {
 	 "reverse search matrix or list for value b\n"
 	 "\t\t\tstarting at index c"},
 	{"runtime", 0, 0, 0, OP_NOP, f_runtime, 0,
-	 "user and kernel mode cpu time in seconds"},
+	 "user and kernel mode CPU time in seconds"},
 	{"saveval", 1, 1, 0, OP_SAVEVAL, 0, 0,
 	 "set flag for saving values"},
 	{"scale", 2, 2, 0, OP_SCALE, 0, 0,
@@ -8964,7 +9087,7 @@ STATIC CONST struct builtin builtins[] = {
 	{"sech", 1, 2, 0, OP_NOP, 0, f_sech,
 	 "hyperbolic secant of a within accuracy b"},
 	{"seed", 0, 0, 0, OP_NOP, f_seed, 0,
-	 "return a 64 bit seed for a psuedo-random generator"},
+	 "return a 64 bit seed for a pseudo-random generator"},
 	{"segment", 2, 3, 0, OP_NOP, 0, f_segment,
 	 "specified segment of specified list"},
 	{"select", 2, 2, 0, OP_NOP, 0, f_select,
@@ -9038,7 +9161,7 @@ STATIC CONST struct builtin builtins[] = {
 	{"system", 1, 1, 0, OP_NOP, 0, f_system,
 	 "call Unix command"},
 	{"systime", 0, 0, 0, OP_NOP, f_systime, 0,
-	 "kernel mode cpu time in seconds"},
+	 "kernel mode CPU time in seconds"},
 	{"tail", 2, 2, 0, OP_NOP, 0, f_tail,
 	 "retain list of specified number at tail of list"},
 	{"tan", 1, 2, 0, OP_NOP, 0, f_tan,
@@ -9054,7 +9177,7 @@ STATIC CONST struct builtin builtins[] = {
 	{"ungetc", 2, 2, 0, OP_NOP, 0, f_ungetc,
 	 "unget char read from file"},
 	{"usertime", 0, 0, 0, OP_NOP, f_usertime, 0,
-	 "user mode cpu time in seconds"},
+	 "user mode CPU time in seconds"},
 	{"version", 0, 0, 0, OP_NOP, 0, f_version,
 	 "calc version string"},
 	{"xor", 1, IN, 0, OP_NOP, 0, f_xor,
@@ -9071,7 +9194,7 @@ STATIC CONST struct builtin builtins[] = {
  *
  * When FUNCLIST is defined, we are being compiled by rules from the help
  * sub-directory to form a program that will produce the main part of the
- * buiiltin help file.
+ * builtin help file.
  *
  * See the builtin rule in the help/Makefile for details.
  */

hash.c

@@ -1,7 +1,7 @@
 /*
  * hash - one-way hash routines
  *
- * Copyright (C) 1999-2007  Landon Curt Noll
+ * Copyright (C) 1999-2007,2021  Landon Curt Noll
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -270,7 +270,7 @@ hash_final(HASH *state)
  * The input is a long.	 If a long is smaller than 64 bits, we will
  * hash a final 32 bits of zeros.
  *
- * This function is OK to hash BOOL's, unslogned long's, unsigned int's
+ * This function is OK to hash BOOL's, unsigned long's, unsigned int's
  * signed int's as well as FLAG's and LEN's.
  */
 HASH *

have_const.c

@@ -1,7 +1,7 @@
 /*
- * have_const - Determine if we want or can support ansi const
+ * have_const - Determine if we want or can support ANSI const
  *
- * Copyright (C) 1999  Landon Curt Noll
+ * Copyright (C) 1999,2021  Landon Curt Noll
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License

have_getpgid.c

@@ -1,7 +1,7 @@
 /*
  * have_getpgid - determine if we have getpgid()
  *
- * Copyright (C) 1999  Landon Curt Noll
+ * Copyright (C) 1999,2021  Landon Curt Noll
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -39,7 +39,10 @@
  */
 
 #include <sys/types.h>
+#include "have_unistd.h"
+#if defined(HAVE_UNISTD_H)
 #include <unistd.h>
+#endif
 
 int
 main(void)

have_getprid.c

@@ -1,7 +1,7 @@
 /*
  * have_getprid - determine if we have getprid()
  *
- * Copyright (C) 1999  Landon Curt Noll
+ * Copyright (C) 1999,2021  Landon Curt Noll
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -40,7 +40,10 @@
 
 
 #include <sys/types.h>
+#include "have_unistd.h"
+#if defined(HAVE_UNISTD_H)
 #include <unistd.h>
+#endif
 
 int
 main(void)

have_getsid.c

@@ -1,7 +1,7 @@
 /*
  * have_getsid - determine if we have getsid()
  *
- * Copyright (C) 1999  Landon Curt Noll
+ * Copyright (C) 1999,2021  Landon Curt Noll
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -40,6 +40,10 @@
 
 
 #include <sys/types.h>
+#include "have_unistd.h"
+#if defined(HAVE_UNISTD_H)
+#include <unistd.h>
+#endif
 
 int
 main(void)

have_memmv.c

@@ -1,7 +1,7 @@
 /*
  * have_memmv - Determine if we have memmove()
  *
- * Copyright (C) 1999  Landon Curt Noll
+ * Copyright (C) 1999,2021  Landon Curt Noll
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -40,6 +40,7 @@
 
 
 #include <stdio.h>
+#include <string.h>
 
 #define MOVELEN 3
 

have_newstr.c

@@ -1,7 +1,7 @@
 /*
  * have_newstr - Determine if we have a system without ANSI C string functions
  *
- * Copyright (C) 1999  Landon Curt Noll
+ * Copyright (C) 1999,2021  Landon Curt Noll
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -42,6 +42,7 @@
 
 
 #include <stdio.h>
+#include <string.h>
 
 #define MOVELEN 3
 

have_offscl.c

@@ -1,7 +1,7 @@
 /*
  * have_offscl - determine if we have a scalar off_t element
  *
- * Copyright (C) 1999  Landon Curt Noll
+ * Copyright (C) 1999,2021  Landon Curt Noll
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -46,13 +46,17 @@
 #include <stdio.h>
 #include <sys/types.h>
 #include <sys/stat.h>
+#include "have_unistd.h"
+#if defined(HAVE_UNISTD_H)
+#include <unistd.h>
+#endif
 
 int
 main(void)
 {
 #if !defined(OFF_T_NON_SCALAR)
-	off_t value;	/* an off_t to perform arithmatic on */
+	off_t value;	/* an off_t to perform arithmetic on */
-	off_t value2;	/* an off_t to perform arithmatic on */
+	off_t value2;	/* an off_t to perform arithmetic on */
 
 	/*
 	 * do some math opts on an off_t

have_posscl.c

@@ -1,7 +1,7 @@
 /*
  * have_posscl - determine if we have a scalar FILEPOS element
  *
- * Copyright (C) 1999  Landon Curt Noll
+ * Copyright (C) 1999,2021  Landon Curt Noll
  *
  * Calc is open software; you can redistribute it and/or modify it under
  * the terms of the version 2.1 of the GNU Lesser General Public License
@@ -45,14 +45,18 @@
 #include <stdio.h>
 #include <sys/types.h>
 #include <sys/stat.h>
+#include "have_unistd.h"
+#if defined(HAVE_UNISTD_H)
+#include <unistd.h>
+#endif
 #include "have_fpos.h"
 
 int
 main(void)
 {
 #if !defined(FILEPOS_NON_SCALAR)
-	FILEPOS value;	/* an FILEPOS to perform arithmatic on */
+	FILEPOS value;	/* an FILEPOS to perform arithmetic on */
-	FILEPOS value2; /* an FILEPOS to perform arithmatic on */
+	FILEPOS value2; /* an FILEPOS to perform arithmetic on */
 
 	/*
 	 * do some math opts on an FILEPOS