Release calc version 2.11.0t7.2

BUGS

@@ -77,15 +77,3 @@ Known problems or mis-features:
     * There is some places in the source with obscure variable names
       and not much in the way of comments.  We need some major cleanup
       and documentation.
-
-    * On a Dec Alpha, using the Dec Alpha cc (not gcc) make check for
-      version 2.11.0t5.1 fails in the regression test:
-
-	From vandermj@molbio.sbphrd.com  Tue Oct  5 04:06:52 1999
-	Subject: Re: oops, try calc version 2.10.0t5.1
-	Date: Tue, 05 Oct 1999 07:06:30 -0400
-
-	Regular cc on Dec alpha, 'make check' dies with:
-
-	1804: surd_value(a) == 2+3i
-	"": line 1706: Calling qfreenum with nozero links!!!

CHANGES

@@ -103,6 +103,23 @@ Following is the change from calc version 2.11.0t7 to date:
 	n == 0	if -c, continue, without -c, stop
 	n < 0	continue on error, even if -c was given on the command line
 
+    Calc compilation now stops at the first scanerror.
+
+    Restored the feature where -p disables the printing of leading tabs
+    as of config("tab",0) had been executed.  So using calc in a pipe:
+
+	calc -p 2+17 | whey
+
+     will write '19' instead of '\t17' to the whey command.
+
+     Updated calc man page and help/usage file to reflect recent
+     command line changes.
+
+     Converted start_done into a general calc run state enum called
+     run_state within the calc source.
+
+     Misc calc man page fixes.
+
 
 Following is the change from calc version 2.11.0t1 to 2.11.0t6.3:
 

calc.c

@@ -11,7 +11,6 @@
 #include <pwd.h>
 #include <sys/types.h>
 #include <ctype.h>
-#include <setjmp.h>
 
 #define CALC_C
 #include "calc.h"
@@ -37,40 +36,13 @@
 #include <stdlib.h>
 #endif
 
-
-/*
- * external definitions and functions
- */
-extern int abortlevel;		/* current level of aborts */
-extern BOOL inputwait;		/* TRUE if in a terminal input wait */
-extern jmp_buf jmpbuf;		/* for errors */
-extern int isatty(int tty);	/* TRUE if fd is a tty */
-
-extern int p_flag;		/* TRUE => pipe mode */
-extern int q_flag;		/* TRUE => don't execute rc files */
-extern int u_flag;		/* TRUE => unbuffer stdin and stdout */
-extern int d_flag;		/* TRUE => disable heading, lib_debug == 0 */
-extern int stoponerror;		/* >0 => stop, <0 => continue, ==0 => use -c */
-
-extern char *pager;		/* $PAGER or default */
-extern int stdin_tty;		/* TRUE if stdin is a tty */
-extern int interactive;		/* TRUE if interactive session (no cmd args) */
-extern char *program;		/* our name */
-extern char cmdbuf[];		/* command line expression */
-
-extern char *version(void);	/* return version string */
-
-
 /*
  * static definitions and functions
  */
-static char *usage = "usage: %s [-C] [-e] [-h] [-i] [-m mode] [-n] [-p]\n"
+static char *usage = "usage: %s [-c] [-C] [-d] [-e] [-h] [-i] [-m mode]\n"
-		     "\t[-q] [-u] [-c] [-d] [[--] calc_cmd ...]\n";
+		     "\t[-n] [-p] [-q] [-u] [-v] [[--] calc_cmd ...]\n";
 static void intint(int arg);	/* interrupt routine */
 
-static int havecommands;
-static int c_flag;		/* To permit continuation after error */
-static int i_flag;		/* To go interactive if permitted */
 
 /*
  * Top level calculator routine.
@@ -163,8 +135,7 @@ main(int argc, char **argv)
 			exit(1);
 		}
 	}
-	interactive = (optind >= argc);
+	havecommands = (optind < argc);
-	havecommands = !interactive;
 
 	/*
 	 * look at the length of any trailing command args
@@ -258,69 +229,73 @@ main(int argc, char **argv)
 		post_init = TRUE;
 	}
 
+	/*
+	 * (re)establish the interrupt handler
+	 */
 	(void) signal(SIGINT, intint);
 
-	if (start_done == 0) {
+	/*
+	 * execute calc code based on the run state
+	 */
+	if (run_state == RUN_PRE_BEGIN) {
 		if (!q_flag && allow_read) {
-			start_done = 1;
+			run_state = RUN_PRE_RCFILES;
 			runrcfiles();
 		}
-		start_done = 2;
+		run_state = RUN_POST_RCFILES;
 	}
-	if (start_done == 1) {
+	if (run_state == RUN_PRE_RCFILES) {
 		fprintf(stderr, "Execution error in rcfiles\n");
 		if ((c_flag && !stoponerror) || stoponerror < 0) {
 			getcommands(FALSE);
-			start_done = 2;
+			run_state = RUN_POST_RCFILES;
 		} else {
 			if ((havecommands && !i_flag) || !stdin_tty)
-				start_done = 7;
+				run_state = RUN_STOP_ON_ERROR;
 			else if (havecommands)
-				start_done = 4;
+				run_state = RUN_POST_CMD_ARGS;
 			else
-				start_done = 2;
+				run_state = RUN_POST_RCFILES;
 		}
 	}
-	if (start_done == 2) {
+	if (run_state == RUN_POST_RCFILES) {
 		if (havecommands) {
-			start_done = 3;
+			run_state = RUN_PRE_CMD_ARGS;
 			(void) openstring(cmdbuf);
 			getcommands(FALSE);
 		}
-		start_done = 4;
+		run_state = RUN_POST_CMD_ARGS;
 	}
-	if (start_done == 3) {
+	if (run_state == RUN_PRE_CMD_ARGS) {
 		fprintf(stderr, "Execution error in commands\n");
 		if ((c_flag && !stoponerror) || stoponerror < 0) {
 			getcommands(FALSE);
-			start_done = 4;
+			run_state = RUN_POST_CMD_ARGS;
-		}
+		} else {
-		else {
 			closeinput();
 			if (!stdin_tty || !i_flag)
-				start_done = 7;
+				run_state = RUN_STOP_ON_ERROR;
 			else
-				start_done = 4;
+				run_state = RUN_POST_CMD_ARGS;
 		}
 	}
-	if (start_done == 4) {
+	if (run_state == RUN_POST_CMD_ARGS) {
 		if (stdin_tty && ((havecommands && !i_flag) || p_flag))
-			start_done = 6;
+			run_state = RUN_NOT_TOP_LEVEL;
 		else
 			openterminal();
-	}
+	} else if (run_state == RUN_TOP_LEVEL) {
-	else if (start_done == 5) {
+		if (!stdin_tty && (!c_flag || stoponerror) &&
-		if (!stdin_tty && (!c_flag || stoponerror) && stoponerror >= 0) {
+		    stoponerror >= 0) {
-			start_done = 7;
+			run_state = RUN_STOP_ON_ERROR;
-		}
+		} else if ((c_flag && !stoponerror) || stoponerror < 0)
-		else if ((c_flag && !stoponerror) || stoponerror < 0)
 			getcommands(FALSE);
 		else
 			reinitialize();
 	}
 
-	if (start_done < 6) {
+	if (run_state < RUN_NOT_TOP_LEVEL) {
-		start_done = 5;
+		run_state = RUN_TOP_LEVEL;
 		getcommands(TRUE);
 	}
 
@@ -328,7 +303,8 @@ main(int argc, char **argv)
 	 * all done
 	 */
 	libcalc_call_me_last();
-	return (start_done - 6) ? 1 : 0;
+	return (run_state == RUN_STOP_ON_ERROR ||
+		run_state == RUN_UNKNOWN) ? 1 : 0;
 }
 
 

calc.h

@@ -10,6 +10,7 @@
 #if !defined(__CALC_H__)
 #define	__CALC_H__
 
+#include <setjmp.h>
 
 #include "value.h"
 
@@ -146,15 +147,34 @@ extern void showerrors(void);
  */
 extern void initialize(void);
 extern void reinitialize(void);
-
+extern int isatty(int tty);	/* TRUE if fd is a tty */
+extern char *version(void);	/* return version string */
+extern int post_init;		/* TRUE => setjmp for math_error is ready */
 
 /*
- * Global data definitions.
+ * global flags and definitions
  */
+extern int abortlevel;		/* current level of aborts */
+extern BOOL inputwait;		/* TRUE if in a terminal input wait */
+extern jmp_buf jmpbuf;		/* for errors */
+
+extern int p_flag;		/* TRUE => pipe mode */
+extern int q_flag;		/* TRUE => don't execute rc files */
+extern int u_flag;		/* TRUE => unbuffer stdin and stdout */
+extern int d_flag;		/* TRUE => disable heading, lib_debug == 0 */
+extern int c_flag;		/* TRUE => continue after error if permitted */
+extern int i_flag;		/* TRUE => try to go interactive after error */
+extern int stoponerror;		/* >0 => stop, <0 => continue, ==0 => use -c */
+
+extern char *pager;		/* $PAGER or default */
+extern int stdin_tty;		/* TRUE if stdin is a tty */
+extern int havecommands;	/* TRUE if have cmd args) */
+extern char *program;		/* our name */
+extern char cmdbuf[];		/* command line expression */
+
 extern int abortlevel;		/* current level of aborts */
 extern BOOL inputwait;		/* TRUE if in a terminal input wait */
 extern VALUE *stack;		/* execution stack */
-extern int start_done;		/* TRUE => start up processing finished */
 extern int dumpnames;		/* TRUE => dump names rather than indices */
 
 extern char *calcpath;		/* $CALCPATH or default */
@@ -172,7 +192,21 @@ extern int allow_read;	/* FALSE => may not open any files for reading */
 extern int allow_write;	/* FALSE => may not open any files for writing */
 extern int allow_exec;	/* FALSE => may not execute any commands */
 
-extern int post_init;	/* TRUE => setjmp for math_error is ready */
+/* 
+ * calc startup and run state 
+ */
+typedef enum {
+    RUN_UNKNOWN = -1,		/* unknown or unset start state */
+    RUN_PRE_BEGIN = 0,		/* pre-startup state, calc execution started */
+    RUN_PRE_RCFILES = 1,	/* rc files about to or are being evaluated */
+    RUN_POST_RCFILES = 2,	/* rc files have been evaluated */
+    RUN_PRE_CMD_ARGS = 3,	/* cmd_args about to or are being evaluated */
+    RUN_POST_CMD_ARGS = 4,	/* cmd_args have been evaluated */
+    RUN_TOP_LEVEL = 5,		/* running at the top interactive level */
+    RUN_NOT_TOP_LEVEL = 6,	/* running not at the top interactive level */
+    RUN_STOP_ON_ERROR = 7	/* we need to stop due to errors */
+} run;
+extern run run_state;	
 
 
 /*

calc.man

@@ -1,190 +1,356 @@
 .\"
-.\" Copyright (c) 1994 David I. Bell and Landon Curt Noll
+.\" Copyright (c) 1993 David I. Bell and Landon Curt Noll
+.\" Original man page dated 15nov93
+.\" Copyright (c) 1999 David I. Bell and Landon Curt Noll
 .\" Permission is granted to use, distribute, or modify this source,
 .\" provided that this copyright notice remains intact.
 .\"
 .\" calculator by David I. Bell
 .\" man page by Landon Noll
-.TH calc 1 "^..^" "15nov93"
+.TH calc 1 "^..^" "15Oct1999"
 .SH NAME
 calc \- arbitrary precision calculator
 .SH SYNOPSIS
 \fIcalc\fP
-[\fI\-h\fP]
+.RB [ \-c ]
-[\fI\-m mode\fP]
+.RB [ \-C ]
-[\fI\-p\fP]
+.RB [ \-d ]
-[\fI\-q\fP]
+.RB [ \-e ]
-[\fI\-u\fP]
+.RB [ \-h ]
-[\fI\-v\fP]
+.RB [ \-i ]
-[\fIcalc_cmd \&.\|.\|.\fp]
+.RB [ \-m\ \&mode ]
+.br
+.in +5n
+.RB [ \-n ]
+.RB [ \-p ]
+.RB [ \-q ]
+.RB [ \-u ]
+.RB [ \-v ]
+.RB [ calc_cmd\ \&.\|.\|. ]
+.in -5n
 .SH DESCRIPTION
 \&
 .br
 CALC COMMAND LINE
 .PP
+
 .TP
-\fI\-h\fP
+.B \-c
-Print a help message.
+Continue reading command lines even after an execution
-This option implies \fI \-q\fP.
+error has caused the abandonment of a line.
-This is equivalent to the calc command \fIhelp help\fP.
+.sp 1
-The help facility is disabled unless the \fImode\fP is 5 or 7.
+For example:
-See \fI\-m\fP below.
+.sp 1
-.sp
+.in +5n
-.TP
-\fI\-m mode\fP
-This flag sets the permission mode of calc.
-It controls the ability for \fIcalc\fP to open files
-and execute programs.
-\fIMode\fP may be a number from 0 to 7.
-.sp
-The \fImode\fP value is interpreted in a way similar
-to that of the \fRchmod(1)\fP octal mode:
-.sp
-.in +0.5i
 .nf
-0   do not open any file, do not execute progs
+calc read many_errors.cal
-1   do not open any file
-2   do not open files for reading, do not execute progs
-3   do not open files for reading
-4   do not open files for writing, do not execute progs
-5   do not open files for writing
-6   do not execute any program
-7   allow everything (default mode)
 .fi
-.in -0.5i
+.in -5n
-.sp
+.sp 1
-If one wished to run calc from a privledged user, one might
+will cause
-want to use \fI\-m 0\fP in an effort to make calc more secure.
+.B calc
-.sp
+to abort on the first error, whereas:
-\fIMode\fP bits for reading and writing apply only on an open.
+.sp 1
+.in +5n
+.nf
+calc -c read many_errors.cal
+.fi
+.in -5n
+.sp 1
+will
+cause
+.B calc
+to try to process each line being read
+despite the errors that it encounters.
+
+.TP
+.B \-C
+Permit the execution of custom builtin functions.  Without
+this flag, calling the custom() builtin function will
+simply generate an error.
+.sp 1
+Use if this flag may cause
+.B calc
+to execute functions that
+are non-standard and that are not portable.  Custom builtin
+functions are disabled by default for this reason.
+
+.TP
+.B \-d
+Disable the printing of the opening title.  The printing
+of library debug and informational messages is also disabled
+as if \fBconfig("lib_debug", 0)\fP had been executed.
+.sp 1
+For example:
+.sp 1
+.in +5n
+calc 'read qtime; qtime(2)'
+.in -5n
+.sp 1
+will output something like:
+.sp 1
+.in +5n
+.nf
+qtime(utc_hr_offset) defined
+It's nearly ten past six.
+.fi
+.in -5n
+.sp 1
+whereas:
+.sp 1
+.in +5n
+.nf
+calc -d 'read qtime; qtime(2)'
+.fi
+.in -5n
+.sp 1
+will just say:
+.sp 1
+.in +5n
+.nf
+It's nearly ten past six.
+.fi
+.in -5n
+.sp 1
+
+.TP
+.B \-e
+Ignore any environment variables on startup.
+The getenv() builtin will still return values, however.
+
+.TP
+.B \-h
+Print a help message.  This option implies
+.BR \-q .
+This
+is equivalent to the
+.B calc
+command help help.
+The help facility is disabled unless the mode is 5 or 7.
+See
+.BR \-m .
+
+.TP
+.B \-i
+Become interactive if possible.
+Be default, if
+.I calc_cmd
+args are given,
+.B calc
+will execute them and exit.
+This flag args are given,
+.B calc
+will execute them and exit.
+This flag will cause
+.B calc
+to drop into interactive mode after the
+commands are executed.
+.sp 1
+For example:
+.sp 1
+.in +5n
+.nf
+calc 2+5
+.fi
+.in -5n
+.sp 1
+will print the value 7 and exit whereas:
+.sp 1
+.in +5n
+.nf
+calc -i 2+5
+.fi
+.in -5n
+.sp 1
+will print the value 7 and prompt the user for more
+.B calc
+commands.
+
+.TP
+.BR \-m " mode"
+This flag sets the permission mode of
+.BR calc .
+It controls the ability for
+.B calc
+to open files and execute programs.
+Mode may be a number from 0 to 7.
+.sp 1
+The mode value is interpreted in a way similar to that
+of the
+.BR chmod (1)
+octal mode:
+.sp 1
+.in +5n
+.nf
+0  do not open any file, do not execute progs
+1  do not open any file
+2  do not open files for reading, do not execute progs
+3  do not open files for reading
+4  do not open files for writing, do not execute progs
+5  do not open files for writing
+6  do not execute any program
+7  allow everything (default mode)
+.fi
+.in -5n
+.sp 1
+If one wished to run
+.B calc
+from a privileged user, one might want to use
+.B \-m
+0 in an effort to make
+.B calc
+somewhat more secure.
+.sp 1
+Mode bits for reading and writing apply only on an
+open.
 Files already open are not effected.
-Thus if one wanted to use the \fI\-m 0\fP in an effort to make
+Thus if one wanted to use the
-\fIcalc\fP more secure, but still wanted to read and write a specific
+.B \-m
-file, one might want to do:
+0 in an effort to make
-.sp
+.B calc
-.in +0.5i
+somewhat more secure, but still wanted to read and write a specific
+file, one might want to do in
+.BR sh (1),
+.BR ksh (1),
+.BR bash (1)-like
+shells:
+.sp 1
+.in +5n
 .nf
-\fRcalc \-m 0 3<a.file\fP
+calc -m 0 3<a.file
 .fi
-.in -0.5i
+.in -5n
-.sp
+.sp 1
-Files presented to \fIcalc\fP in this way are opened in an unknown mode.
+Files presented to
-\fICalc\fP will attempt to read or write them if directed.
+.B calc
-.sp
+in this way are opened in an
-If the \fImode\fP disables opening of files for reading, then
+unknown mode.
-the startup library scripts are disabled as of \fI\-q\fP was given.
+.B Calc
-The reading of key bindings is also disabled when the \fImode\fP
+will attempt to read or write them if directed.
-disables opening of files for reading.
+.sp 1
+If the mode disables opening of files for reading, then
+the startup library scripts are disabled as of
+.B \-q
+was given.
+The reading of key bindings is also disabled
+when the mode disables opening of files for reading.
+
 .TP
-\fI \-p\fP
+.B \-n
-Pipe processing is enabled by use of \-p.  For example:
+Use the new configuration defaults instead of the old
-.sp
+default classic defaults.
-.in +0.5i
+This flag as the same effect
+as executing \fBconfig("all", "newcfg")\fP at startup time.
+
+.TP
+.B \-p
+Pipe processing is enabled by use of
+.BR \-p .
+For example:
+.sp 1
+.in +5n
 .nf
-\fRecho "print 2^21701\-1, 2^23209\-1" | calc \-p | fizzbin\fP
+calc -p '2^21701-1' | fizzbin
 .fi
-.in -0.5i
+.in -5n
-.sp
+.sp 1
-In pipe mode, \fIcalc\fP does not prompt, does not print leading tabs
+In pipe mode,
-and does not print the initial header.
+.B calc
+does not prompt, does not print leading
+tabs and does not print the initial header.
+The
+.B \-p
+flag overrides
+.BR \-i .
+
 .TP
-\fI \-q\fP
+.B \-q
-Disable the use of the \fI$CALCRC\fP startup scripts.
+Disable the use of the $CALCRC startup scripts.
+
 .TP
-\fI \-u\fP
+.B \-u
 Disable buffering of stdin and stdout.
+
 .TP
-\fI \-v\fP
+.B \-v
-Print the version and exit.
+Print the
+.B calc
+version number and exit.
 .PP
-Without \fIcalc_cmd\fPs, \fIcalc\fP operates interactively.
+Without
-If one or more \fIcalc_cmd\fPs are given on the command line,
+.IR calc_cmd ,
-\fIcalc\fP will execute them and exit.
+.B calc
-The printing of leading tabs on output is disabled
+operates interactively.
-as if \fIconfig("tab",0)\fP had been executed.
+If one or more
+.I calc_cmd
+are given on the command line,
+.B calc
+will execute them and exit.
+If
+.B \-i
+is given,
+.B calc
+will attempt to become interactive
+even of one or more
+.I calc_cmd
+are given on the command line.
 .PP
-Normally on startup, \fIcalc\fP attempts to execute a collection
+Normally on startup,
-of library scripts.
+.B calc
-The environment variable \fI$CALCRC\fP (if non-existent then
+attempts to execute a collection of
-a compiled in value) contains a \fI:\fP separated list of
+library scripts.
-startup library scripts.
+The environment variable $CALCRC (if non-existent
-No error conditions are produced if these startup library scripts
+then a compiled in value) contains a :  separated list of startup
-are not found.
+library scripts.
+No error conditions are produced if these startup
+library scripts are not found.
 .PP
-If the \fImode\fP disables opening of files for reading, then
+If the mode disables opening of files for reading, then the startup
-the startup library scripts are disabled as of \fI\-q\fP was given
+library scripts are disabled as of
-and \fI$CALCRC\fP as well as the default compiled in value are ignored.
+.B \-q
+was given and $CALCRC as well
+as the default compiled in value are ignored.
 .PP
 Filenames are subject to ``~'' expansion (see below).
-The environment variable \fI$CALCPATH\fP (if non-existent then
+The
-a compiled in value) contains a \fI:\fP separated list of search
+environment variable $CALCPATH (if non-existent then a compiled in
-directories.
+value) contains a : separated list of search directories.
-If a file does not begin with \fI/\fP, \fI~\fP or \fI./\fP,
+If a
-then it is searched for under each directory listed in the \fI$CALCPATH\fP.
+file does not begin with /, ~ or ./, then it is searched for under
-It is an error if no such readable file is found.
+each directory listed in the $CALCPATH.
+It is an error if no such
+readable file is found.
 .PP
-Calc treats all open files, other than stdin, stdout and stderr
+.B Calc
-as files available for reading and writing.
+treats all open files, other than stdin, stdout and
-One may present calc with an already open file in the following way:
+stderr as files available for reading and writing.
-.sp
+One may
-.in +0.5i
+present
+.B calc
+with an already open file using
+.BR sh (1),
+.BR ksh (1),
+.BR bash (1)-like
+shells is to:
+.sp 1
+.in +5n
+calc 3<open_file 4<open_file2
+.in -5n
+.sp 1
+For more information use the following
+.B calc
+commands:
+.sp 1
+.in +5n
 .nf
-\fRcalc 3<open_file 4<open_file2\fP
-.fi
-.in -0.5i
-.PP
-For more information use the following calc commands:
-.PP
-.in 1.0i
-help usage
-.br
 help help
-.br
+help overview
+help usage
 help environment
-.in -1.0i
+help config
-.PP
+.fi
-OVERVIEW
+.in -5n
-.PP
+.sp 1
-\fICalc\fP is arbitrary precision arithmetic system that uses
-a C-like language.
-\fICalc\fP is useful as a calculator, an algorithm prototyped
-and as a mathematical research tool.
-More importantly, \fIcalc\fP provides one with a machine
-independent means of computation.
-.PP
-\fICalc\fP comes with a rich set of builtin mathematical
-and programmatic functions.
-.PP
-\fICalc\fP is distributed with library of scripts.
-Written in the same C-like language, library scripts may be
-read in and executed during a \fIcalc\fP session.
-These library scripts are also provided because they are
-useful and to serve as examples of the \fIcalc\fP language.
-One may further extend \fIcalc\fP thru the
-use of user defined scripts.
-.PP
-Internally calc represents numeric values as fractions reduced to their
-lowest terms.
-The numerators and denominators of these factions may grow to
-arbitrarily large values.
-Numeric values read in are automatically converted into rationals.
-The user need not be aware of this internal representation.
-.PP
-For more information use the following calc commands:
-.PP
-.in 1.0i
-help intro
-.br
-help builtin
-.br
-help stdlib
-.br
-help define
-.br
-show builtins
-.br
-show functions
-.in -1.0i
 .PP
 DATA TYPES
 .PP
@@ -199,7 +365,9 @@ multiplication, division, negation, squaring, modulus,
 rounding, exponentiation, equality, comparison, printing
 and so on.
 .PP
-For more information use the following calc commands:
+For more information use the following
+.B calc
+commands:
 .PP
 .in 1.0i
 help types
@@ -220,7 +388,9 @@ procedure.
 Values may be grouped together in a matrix, or into a
 a list that permits stack and queue style operations.
 .PP
-For more information use the following calc commands:
+For more information use the following
+.B calc
+commands:
 .PP
 .in 1.0i
 help variable
@@ -256,7 +426,9 @@ For example:
 ~chongo/lib/fft_multiply.cal
 .in -1.0i
 .PP
-For more information use the following calc command:
+For more information use the following
+.B calc
+command:
 .PP
 .in 1.0i
 help file
@@ -275,7 +447,9 @@ These include commands such as function definition, help,
 reading in library scripts, dump files to a file, error notification,
 configuration control and status.
 .PP
-For more information use the following calc command:
+For more information use the following
+.B calc
+command:
 .PP
 .in 1.0i
 help command
@@ -295,7 +469,8 @@ help config
 .PD 0
 .TP 20
 ${LIBDIR}/*.cal
-library scripts shipped with calc
+library scripts shipped with
+.B calc
 .br
 .sp
 .TP 20
@@ -323,7 +498,9 @@ Default value: ${CALCPATH}
 .TP 5
 CALCRC
 On startup (unless \-h or \-q was given on the command
-line), calc searches for files along this :-separated
+line),
+.B calc
+searches for files along this :-separated
 environment variable.
 .br
 .sp
@@ -333,7 +510,9 @@ Default value: ${CALCRC}
 .TP 5
 CALCBINDINGS
 On startup (unless \fI\-h\fP or \fI\-q\fP was given on the command
-line, or \fI\-m\fP disallows opening files for reading), calc reads
+line, or \fI\-m\fP disallows opening files for reading),
+.B calc
+reads
 key bindings from the filename specified
 by this environment variable.
 .br
@@ -343,9 +522,12 @@ Default value: ${CALCBINDINGS}
 .SH CREDIT
 \&
 .br
-The majority of calc was written by David I. Bell.
+The majority of
+.B calc
+was written by David I. Bell.
 .sp
-Calc archives and calc-tester mailing list maintained by Landon Curt Noll.
+.B Calc
+archives and calc-tester mailing list maintained by Landon Curt Noll.
 .sp
 Thanks for suggestions and encouragement from Peter Miller,
 Neil Justusson, and Landon Noll.
@@ -378,30 +560,27 @@ Copyright (c) 19xx Ernest Bowen and Landon Curt Noll
 Permission is granted to use, distribute, or modify this source,
 provided that this copyright notice remains intact.
 .sp
-Send calc comments, suggestions, bug fixes, enhancements
+Send comments, suggestions, bug fixes, enhancements
-and interesting calc scripts that you would like you see included
+and interesting
+.B calc
+scripts that you would like you see included
 in future distributions to:
 .sp
 .in +0.5i
-dbell@auug.org.au
+calc-tester-request@postofc.corp.sgi.com
-.br
-chongo@toad.com
 .in -0.5i
 .sp
-Landon Noll maintains the official calc ftp archive at:
+Landon Noll maintains the the
+.B calc
+web site is located at:
 .sp
 .in +0.5i
-ftp://ftp.uu.net/pub/calc
+http://reality.sgi.com/chongo/calc
 .in -0.5i
 .sp
-Alpha test versions, complete with bugs, untested code and
+One may join the
-experimental features may be fetched (if you are brave) under:
+.B calc
-.sp
+testing group by sending a request to:
-.in +0.5i
-http://reality.sgi.com/chongo/calc/
-.in -0.5i
-.sp
-One may join the calc testing group by sending a request to:
 .sp
 .in +0.5i
 calc-tester-request@postofc.corp.sgi.com
@@ -410,14 +589,14 @@ calc-tester-request@postofc.corp.sgi.com
 Your message body (not the subject) should consist of:
 .sp
 .in +0.5i
+.nf
 subscribe calc-tester address
-.br
 end
-.br
 name your_full_name
+.fi
+.in -0.5i
 .sp
 where "address" is your EMail address and "your_full_name"
 is your full name.
-.in -0.5i
 .sp
-Enjoy!
+Share and Enjoy! :\-)

help/usage

@@ -2,7 +2,22 @@ Calc command line
 
     Calc has the following command line:
 
-	calc [-C] [-e] [-h] [-i] [-m mode] [-n] [-p] [-q] [-u] [calc_cmd ...]
+	calc [-c] [-C] [-d] [-e] [-h] [-i] [-m mode]
+	     [-n] [-p] [-q] [-u] [-v] [calc_cmd ...]
+
+	-c  Continue reading command lines even after an execution
+	    error has caused the abandonment of a line.
+
+	    For example:
+
+		calc read many_errors.cal
+
+	    will cause calc to abort on the first error, whereas:
+
+		calc -c read many_errors.cal
+
+	    will cause calc to try to process each line being read
+	    despite the errors that it encounters.
 
 	-C  Permit the execution of custom builtin functions.  Without
 	    this flag, calling the custom() builtin function will
@@ -12,6 +27,27 @@ Calc command line
 	    are non-standard and that are not portable.  Custom builtin
 	    functions are disabled by default for this reason.
 
+	-d  Disable the printing of the opening title.  The printing
+	    of library debug and informational messages is also disabled
+	    as if config("lib_debug",0) had been executed.
+
+	    For example:
+
+		calc 'read qtime; qtime(2)'
+
+	    will output something like:
+
+		qtime(utc_hr_offset) defined
+		It's nearly ten past six.
+
+	    whereas:
+
+		calc -d 'read qtime; qtime(2)'
+
+	    will just say:
+
+		It's nearly ten past six.
+
 	-e  Ignore any environment variables on startup.  The
 	    getenv() builtin will still return values, however.
 
@@ -19,7 +55,21 @@ Calc command line
 	    is equivalent to the calc command help help.  The help
 	    facility is disabled unless the mode is 5 or 7.  See -m.
 
-	-i  Do not about if the error count exceeds maxerr().
+	-i  Become interactive if possible.  Be default, if calc_cmd
+	    args are given, calc will execute them and exit.  This flag
+	    will cause calc to drop into interactive mode after the
+	    commands are executed.
+
+	    For example:
+
+		calc 2+5
+
+	    will print the value 7 and exit whereas:
+
+		calc -i 2+5
+
+	    will print the value 7 and prompt the user for more
+	    calc commands.
 
 	-m mode
 	   This flag sets the permission mode of calc.  It
@@ -38,7 +88,7 @@ Calc command line
 		6  do not execute any program
 		7  allow everything (default mode)
 
-	   If one wished to run calc from a privledged user, one
+	   If one wished to run calc from a privileged user, one
 	   might want to use -m 0 in an effort to make calc more
 	   secure.
 
@@ -46,7 +96,7 @@ Calc command line
 	   open.  Files already open are not effected. Thus if one
 	   wanted to use the -m 0 in an effort to make calc more
 	   secure, but still wanted to read and write a specific
-	   file, one might want to do:
+	   file, one might want to do in sh, ksh, bash-like shells:
 
 		     calc -m 0 3<a.file
 
@@ -59,25 +109,28 @@ Calc command line
 	   given.  The reading of key bindings is also disabled
 	   when the mode disables opening of files for reading.
 
-	-n  Use the new configutation defaults instead of the old
+	-n  Use the new configuration defaults instead of the old
 	    default classic defaults.  This flag as the same effect
 	    as executing config("all", "newcfg") at startup time.
 
 	-p  Pipe processing is enabled by use of -p.  For example:
 
-		     echo "print 2^21701-1, 2^23209-1" | calc -p | fizzbin
+		     calc -p '2^21701-1' | fizzbin
 
-	    In pipe mode, calc does not prompt, does not print
+	    In pipe mode, calc does not prompt, does not print leading
-	    leading tabs and does not print the initial header.
+	    tabs and does not print the initial header.  The -p flag
+	    overrides -i.
 
 	-q  Disable the use of the $CALCRC startup scripts.
 
 	-u  Disable buffering of stdin and stdout.
 
+	-v  Print calc version number and exit.
+
     Without `calc_cmd', calc operates interactively.  If one or more
     `calc_cmd' are given on the command line, calc will execute them and
-    exit.  The printing of leading tabs on output is disabled as if
+    exit.  If -i is given, calc will attempt to become interactive
-    config("tab",0) had been executed.
+    even of one or more `calc_cmd' are given on the command line.
 
     Normally on startup, calc attempts to execute a collection of
     library scripts.  The environment variable $CALCRC (if non-existent
@@ -98,7 +151,8 @@ Calc command line
 
     Calc treats all open files, other than stdin, stdout and
     stderr as files available for reading and writing. One may
-    present calc with an already open file in the following way:
+    present calc with an already open file using sh, ksh or bash-like
+    shells is to:
 
         calc 3<open_file 4<open_file2
 

input.c

@@ -311,7 +311,7 @@ f_open(char *name, char *mode)
 	 */
 	if (!allow_read && !allow_write) {
 		/* no reads and no writes means no opens! */
-		if (start_done) {
+		if (run_state > RUN_PRE_BEGIN) {
 			fprintf(stderr,
 				"open of %s mode %s - %s\n", name, mode,
 				"open for read or write disallowed by -m\n");
@@ -319,7 +319,7 @@ f_open(char *name, char *mode)
 		return NULL;
 	} else if (!allow_read && strchr(mode, 'r') != NULL) {
 		/* reading new files disallowed */
-		if (start_done) {
+		if (run_state > RUN_PRE_BEGIN) {
 			fprintf(stderr,
 				"open of %s mode %s - %s\n", name, mode,
 				"open for read disallowed by -m\n");
@@ -330,7 +330,7 @@ f_open(char *name, char *mode)
 		    strchr(mode, 'a') != NULL ||
 		    strchr(mode, '+') != NULL)) {
 		/* writing new files disallowed */
-		if (start_done) {
+		if (run_state > RUN_PRE_BEGIN) {
 			fprintf(stderr,
 				"open of %s mode %s - %s\n", name, mode,
 				"open for write disallowed by -m\n");

lib_calc.c

@@ -63,8 +63,8 @@ int new_std = FALSE;	/* TRUE (-n) => use newstd configuration */
 int abortlevel;		/* current level of aborts */
 BOOL inputwait;		/* TRUE if in a terminal input wait */
 jmp_buf jmpbuf;		/* for errors */
-int start_done = FALSE;	/* TRUE => start up processing finished */
+run run_state = RUN_UNKNOWN;	/* calc startup and run state */
-char *program = "calc";	/* our name */
+char *program = "calc";		/* our name */
 char cmdbuf[MAXCMD+1+1+1];	/* command line expression + "\n\0" + guard */
 
 
@@ -83,8 +83,8 @@ int p_flag = FALSE;	/* TRUE => pipe mode */
 int q_flag = FALSE;	/* TRUE => don't execute rc files */
 int u_flag = FALSE;	/* TRUE => unbuffer stdin and stdout */
 int d_flag = FALSE;	/* TRUE => disable heading, lib_debug == 0 */
-
+int c_flag = FALSE;	/* TRUE => continue on error if permitted */
-int stoponerror = FALSE;	/* >0 => stop, <0 => continue on error */
+int i_flag = FALSE;	/* TRUE => go interactive if permitted */
 
 /*
  * global values
@@ -96,8 +96,9 @@ char *home;		/* $HOME or default */
 char *pager;		/* $PAGER or default */
 char *shell;		/* $SHELL or default */
 int stdin_tty = FALSE;	/* TRUE if stdin is a tty */
-int interactive = FALSE; /* TRUE if interactive session (no cmd args) */
+int havecommands = FALSE;	/* TRUE if have one or more cmd args */
-int post_init = FALSE;	/* TRUE setjmp for math_error is readready */
+int stoponerror = FALSE;	/* >0 => stop, <0 => continue on error */
+int post_init = FALSE;	/* TRUE setjmp for math_error is ready */
 
 int no_env = FALSE;	/* TRUE (-e) => ignore env vars on startup */
 int errmax = ERRMAX;	/* if >= 0,  maximum value for errcount */
@@ -164,6 +165,13 @@ libcalc_call_me_first(void)
 		conf->lib_debug = 0;
 	}
 
+	/*
+	 * -p turns off tab
+	 */
+	if (p_flag) {
+		conf->tab_ok = 0;
+	}
+
 	/*
 	 * initialize
 	 */
@@ -172,6 +180,7 @@ libcalc_call_me_first(void)
 	/*
 	 * ready to rock & roll ..
 	 */
+	run_state = RUN_PRE_BEGIN;
 	init_done = 1;
 	return;
 }

token.c

@@ -643,6 +643,10 @@ scanerror(int skip, char *fmt, ...)
 	va_end(ap);
 	fprintf(stderr, "%s\n", buf);
 
+	/* bail out if continuation not permitted */
+	if ((!c_flag && !stoponerror) || stoponerror > 0)
+		longjmp(jmpbuf, 1);
+
 	/* bail out if too many errors */
 	if (conf->maxscancount > 0 && errorcount > conf->maxscancount) {
 		fputs("Too many scan errors, compilation aborted.\n", stderr);

version.c

@@ -12,7 +12,7 @@
 #define MAJOR_VER	2	/* major version */
 #define MINOR_VER	11	/* minor version */
 #define MAJOR_PATCH	0	/* patch level or 0 if no patch */
-#define MINOR_PATCH	"7.1"	/* test number or empty string if no patch */
+#define MINOR_PATCH	"7.2"	/* test number or empty string if no patch */
 
 /*
  * calc version constants