Release calc version 2.11.0t10.4

CHANGES

@@ -44,7 +44,66 @@ The following are the changes from calc version 2.11.0t10 to date:
 
     Added calcliblist and calcliblistfmt utility Makefile rules to allow
     one to print the list of distribution files that are used (but not
-    built) to form a .a calc library.
+    built) to form either the libcalc.a or the libcustcalc.a library.
+
+    Added a patch from Randall.Gray@marine.csiro.au to make ^D terminate,
+    but *only* if the line it is on is completely empty.  Removed lib/altbind
+    and removed the CALCBINDINGS Makefile variable.
+
+    A new config("ctrl_d") value controls how the ``delete_char'', which
+    by default is bound to ^D (Control D), will or will not exit calc:
+
+	config("ctrl_d", "virgin_eof")
+
+	    If ^D is the only character that has been typed on a line,
+	    then calc will exit.  Otherwise ^D will act according to the
+	    calc binding, which by default is a Emacs-style delete-char.
+
+	    This is the default mode.
+
+	config("ctrl_d", "never_eof")
+
+	    The ^D never exits calc and only acts according calc binding,
+	    which by default is a Emacs-style delete-char.
+
+	    Emacs purists may want to set this in their ~/.calcrc startup file.
+
+	config("ctrl_d", "empty_eof")
+
+	    The ^D always exits calc if typed on an empty line.  This
+	    condition occurs when ^D either the first character typed,
+	    or when all other characters on the line have been removed
+	    (say by deleting them).
+
+	    Users who always want to exit when ^D is typed at the beginning
+	    of a line may want to set this in their ~/.calcrc startup file.
+
+	Note that config("ctrl_d") apples to the character bound to each
+	and every ``delete_char''.  So if an alternate binding it setup,
+	then those char(s) will have this functionality.
+
+    Updated help/config and help/mode, improved the readability and
+    fixed a few typos.  Documented modes, block formats and block bases
+    ("mode", "blkfmt" & "blkbase") that were previously left off out of
+    the documentation.
+
+    The config("blkbase") and config("blkfmt") values return strings
+    instead of returning integers.  One cannot use integers to set
+    these values, so returning integers was useless.
+
+    The following config values return "on" or "off" strings:
+
+	    tilde  tab  leadzero  fullzero  blkverbose  verbose_quit
+
+	These config values can still be set with same boolean strings
+	("on", "off", "true", "false", "t", ...) as well as via the
+	numerical values 0 (for "off") and non-0 (for "on"), however.
+
+    Applied the dangling name fix from Ernest Bowen <ernie@turing.une.edu.au>.
+
+    Show func prints function on order of their indices, and with
+    config("lib_debug") & 4 == 4  some more details about the functions
+    are displayed.
 
 
 The following are the changes from calc version 2.11.0t8.9.1 to 2.11.0t9.4.5:

HOWTO.INSTALL

@@ -19,11 +19,6 @@ Installing calc in 4 easy steps:
 	   As shipped the Makefile assumes 'more'.  On your system
 	   you may find 'less' to be a better pager.
 
-	   The CALCBINDINGS is matter of personal taste.  As shipped
-	   the Makefile assumes a default quasi-emacs-like command
-	   line editor.	 Changing CALCBINDINGS= altbind will cause ^D
-	   to end calc in a fashion similar to that of the bc(1) command.
-
 	   Set TOPDIR to be the place under which help files, calc,
 	   include files and calc libs are to be installed.  As shipped
 	   the Makefile assumes a TOPDIR of /usr/local/lib.

Makefile

@@ -402,23 +402,11 @@ CALCPATH= .:./lib:~/lib:${LIBDIR}:${CUSTOMLIBDIR}
 #
 CALCRC= ${LIBDIR}/startup:~/.calcrc
 
-# If the $CALCBINDINGS environment variable is not defined, then the following
-# file will be used for the command line and edit history key bindings.
-# The $CALCPATH will be used to search for this file.
-#
-#	${LIBDIR}/bindings	uses ^D for editing
-#	${LIBDIR}/altbind	uses ^D for EOF
-#
-# NOTE: This facility is disabled if USE_READLINE is set to -DUSE_READLINE.
-#
-CALCBINDINGS= bindings
-#CALCBINDINGS= altbind
-
 # Determine of the GNU-readline facility will be used instead of the
-# built-in CALCBINDINGS above.
+# built-in calc binding method.
 #
-# USE_READLINE=			    Do not use GNU-readline, use CALCBINDINGS
+# USE_READLINE=			    Do not use GNU-readline, use calc bindings
-# USE_READLINE= -DUSE_READLINE	    Use GNU-readline, do not use CALCBINDINGS
+# USE_READLINE= -DUSE_READLINE	    Use GNU-readline, do not use calc bindings
 #
 # NOTE: If you select the 'USE_READLINE= -DUSE_READLINE' mode, you must set:
 #
@@ -1094,8 +1082,7 @@ calc.1: calc.man ${MAKE_FILE}
 	-rm -f calc.1
 	${SED} -e 's:$${LIBDIR}:${LIBDIR}:g' \
 	       -e 's,$${CALCPATH},${CALCPATH},g' \
-	       -e 's,$${CALCRC},${CALCRC},g' \
+	       -e 's,$${CALCRC},${CALCRC},g' < calc.man > calc.1
-	       -e 's,$${CALCBINDINGS},${CALCBINDINGS},g' < calc.man > calc.1
 
 ##
 #
@@ -1159,11 +1146,6 @@ conf.h: ${MAKE_FILE}
 	${Q}echo '#define DEFAULTCALCRC "${CALCRC}"' >> conf.h
 	${Q}echo '#endif /* DEFAULTCALCRC */' >> conf.h
 	${Q}echo '' >> conf.h
-	${Q}echo '/* the default key bindings file */' >> conf.h
-	${Q}echo '#ifndef DEFAULTCALCBINDINGS' >> conf.h
-	${Q}echo '#define DEFAULTCALCBINDINGS "${CALCBINDINGS}"' >> conf.h
-	${Q}echo '#endif /* DEFAULTCALCBINDINGS */' >> conf.h
-	${Q}echo '' >> conf.h
 	${Q}echo '/* the location of the help directory */' >> conf.h
 	${Q}echo '#ifndef HELPDIR' >> conf.h
 	${Q}echo '#define HELPDIR "${HELPDIR}"' >> conf.h
@@ -2652,7 +2634,6 @@ env:
 	@echo "MANMAKE=${MANMAKE}"; echo ""
 	@echo "CALCPATH=${CALCPATH}"; echo ""
 	@echo "CALCRC=${CALCRC}"; echo ""
-	@echo "CALCBINDINGS=${CALCBINDINGS}"; echo ""
 	@echo "CALCPAGER=${CALCPAGER}"; echo ""
 	@echo "DEBUG=${DEBUG}"; echo ""
 	@echo "NO_SHARED=${NO_SHARED}"; echo ""
@@ -2964,6 +2945,7 @@ install: calc libcalc.a ${LIB_H_SRC} ${BUILD_H_SRC} calc.1
 	-rm -f ${LIBDIR}/libcalcerr.a libcalcerr.a
 	-rm -f ${LIBDIR}/calc_errno.h calc_errno.h ${INCDIRCALC}/calc_errno.h
 	-rm -f calc_errno.c calc_errno.o calc_errno
+	-rm -f ${LIBDIR}/altbind ${HELPDIR}/altbind
 	${V} echo '=-=-=-=-= end of $@ rule =-=-=-=-='
 
 ##

addop.c

@@ -22,6 +22,7 @@
 
 static long maxopcodes;		/* number of opcodes available */
 static long newindex;		/* index of new function */
+static char *newname;		/* name of new function */
 static long oldop;		/* previous opcode */
 static long oldoldop;		/* opcode before previous opcode */
 static long debugline;		/* line number of latest debug opcode */
@@ -61,26 +62,49 @@ initfunctions(void)
 void
 showfunctions(void)
 {
-	FUNC **fpp;		/* pointer into function table */
 	FUNC *fp;		/* current function */
 	long count;
+	long index;
 
 	count = 0;
 	if (funccount > 0) {
-		for (fpp = &functions[funccount - 1]; fpp >= functions; fpp--) {
+		if (conf->lib_debug & LIBDBG_FUNC_INFO)
-			fp = *fpp;
+			math_str("Index\tName        \tArgs\tOpcodes\n"
+				 "-----\t------     \t---- \t------\n");
+		else
+			math_str("Name\tArguments\n"
+				 "----\t---------\n");
+		for (index = 0; index < funccount; index++) {
+			fp = functions[index];
+			if (conf->lib_debug & LIBDBG_FUNC_INFO) {
+
+				math_fmt("%5ld\t%-12s\t", index,
+					namestr(&funcnames,index));
+				if (fp) {
+					count++;
+					math_fmt("%-5d\t%-5ld\n",
+					 fp->f_paramcount, fp->f_opcodecount);
+				} else {
+					math_str("null\t0\n");
+				}
+			} else {
 				if (fp == NULL)
 					continue;
-			if (count++ == 0) {
+				count++;
-				printf("Name Arguments\n---- ---------\n");
+				math_fmt("%-12s\t%-2d\n", namestr(&funcnames,
-			}
+					index), fp->f_paramcount);
-			printf("%-12s %-2d\n", fp->f_name, fp->f_paramcount);
 			}
 		}
-	if (count > 0) {
+	}
-		printf("\nNumber: %ld\n", count);
+	if (conf->lib_debug & LIBDBG_FUNC_INFO) {
+		math_fmt("\nNumber non-null: %ld\n", count);
+		math_fmt("Number null: %ld\n", funccount - count);
+		math_fmt("Total number: %ld\n", funccount);
 	} else {
-		printf("No user functions defined\n");
+		if (count > 0)
+			math_fmt("\nNumber: %ld\n", count);
+		else
+			math_str("No user functions defined\n");
 	}
 }
 
@@ -115,7 +139,8 @@ beginfunc(char *name, BOOL newflag)
 	fp->f_opcodecount = 0;
 	fp->f_savedvalue.v_type = V_NULL;
 	fp->f_savedvalue.v_subtype = V_NOSUBTYPE;
-	fp->f_name = namestr(&funcnames, newindex);
+	newname = namestr(&funcnames, newindex);
+	fp->f_name = newname;
 	curfunc = fp;
 	initlocals();
 	initlabels();
@@ -142,10 +167,11 @@ endfunc(void)
 		addop(OP_UNDEF);
 		addop(OP_RETURN);
 	}
+
 	checklabels();
+
 	if (errorcount) {
-		freefunc(curfunc);
+		printf("\"%s\": %ld error%s\n", newname, errorcount,
-		printf("\"%s\": %ld error%s\n", curfunc->f_name, errorcount,
 			((errorcount == 1) ? "" : "s"));
 		return;
 	}
@@ -167,7 +193,7 @@ endfunc(void)
 	}
 	if ((inputisterminal() && conf->lib_debug & LIBDBG_STDIN_FUNC) ||
 		(!inputisterminal() && conf->lib_debug & LIBDBG_FILE_FUNC)) {
-		printf("%s(", fp->f_name);
+		printf("%s(", newname);
 		for (index = 0; index <	 fp->f_paramcount; index++) {
 			if (index)
 				putchar(',');
@@ -231,7 +257,7 @@ rmuserfunc(char *name)
 
 	index = findstr(&funcnames, name);
 	if (index < 0) {
-		printf("%s() has never been defined\n",
+		fprintf(stderr, "%s() has never been defined\n",
 			name);
 		return;
 	}
@@ -252,12 +278,25 @@ rmuserfunc(char *name)
 void
 freefunc(FUNC *fp)
 {
+	long index;
 	long i;
 
 	if (fp == NULL)
 		return;
+	if (fp == curfunc) {
+		index = newindex;
+	} else {
+		for (index = 0; index < funccount; index++) {
+			if (functions[index] == fp)
+				break;
+		}
+		if (index == funccount) {
+			math_error("Bad call to freefunc!!!");
+			/*NOTREACHED*/
+		}
+	}
 	if (conf->traceflags & TRACE_FNCODES) {
-		printf("Freeing function \"%s\"\n", fp->f_name);
+		printf("Freeing function \"%s\"\n",namestr(&funcnames,index));
 		dumpnames = FALSE;
 		for (i = 0; i < fp->f_opcodecount; ) {
 			printf("%ld: ", i);
@@ -273,12 +312,14 @@ freefunc(FUNC *fp)
 void
 rmalluserfunc(void)
 {
-	FUNC **fpp;
+	FUNC *fp;
+	long index;
 
-	for (fpp = functions; fpp < &functions[funccount]; fpp++) {
+	for (index = 0; index < funccount; index++) {
-		if (*fpp) {
+		fp = functions[index];
-			freefunc(*fpp);
+		if (fp) {
-			*fpp = NULL;
+			freefunc(fp);
+			functions[index] = NULL;
 		}
 	}
 }

calc.h

@@ -22,10 +22,11 @@
  */
 #define CALCPATH	"CALCPATH"	/* environment variable for files */
 #define CALCRC		"CALCRC"	/* environment variable for startup */
-#define CALCBINDINGS	"CALCBINDINGS"	/* environment variable for hist bindings */
+#define CALCBINDINGS	"CALCBINDINGS"	/* env variable for hist bindings */
 #define HOME		"HOME"		/* environment variable for home dir */
 #define PAGER		"PAGER"		/* environment variable for help */
 #define SHELL		"SHELL"		/* environment variable for shell */
+#define DEFAULTCALCBINDINGS "bindings"	/* default calc bindings file */
 #define DEFAULTCALCHELP "help"		/* help file that -h prints */
 #define DEFAULTSHELL	"sh"		/* default shell to use */
 #define CALCEXT		".cal"	/* extension for files read in */

calc.man

@@ -555,9 +555,10 @@ line, or \fI\-m\fP disallows opening files for reading),
 reads
 key bindings from the filename specified
 by this environment variable.
-.br
+The key binding file is searched for along the $CALCPATH list
+of directories.
 .sp
-Default value: ${CALCBINDINGS}
+Default value: binding
 .sp
 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.

config.c

@@ -56,6 +56,8 @@ NAMETYPE configs[] = {
 	{"calc_debug",	CONFIG_CALC_DEBUG},
 	{"user_debug",	CONFIG_USER_DEBUG},
 	{"verbose_quit",CONFIG_VERBOSE_QUIT},
+	{"ctrl_d",	CONFIG_CTRL_D},
+	    {"ctrl-d",	CONFIG_CTRL_D},		/* alias for ctrl_d */
 	{NULL,		0}
 };
 
@@ -97,7 +99,8 @@ CONFIG oldstd = {	/* backward compatible standard configuration */
 	0,			/* internal calc debug level */
 	3,			/* calc library debug level */
 	0,			/* user defined debug level */
-	TRUE			/* print Quit or abort executed messages */
+	TRUE,			/* print Quit or abort executed messages */
+	CTRL_D_VIRGIN		/* ^D only exits on virgin lines */
 };
 CONFIG newstd = {	/* new non-backward compatible configuration */
 	MODE_INITIAL,		/* current output mode */
@@ -133,7 +136,8 @@ CONFIG newstd = {	/* new non-backward compatible configuration */
 	0,			/* internal calc debug level */
 	3,			/* calc library debug level */
 	0,			/* user defined debug level */
-	TRUE			/* print Quit or abort executed messages */
+	TRUE,			/* print Quit or abort executed messages */
+	CTRL_D_VIRGIN		/* ^D only exits on virgin lines */
 };
 CONFIG *conf = NULL;	/* loaded in at startup - current configuration */
 
@@ -142,11 +146,15 @@ CONFIG *conf = NULL;	/* loaded in at startup - current configuration */
  * Possible output modes.
  */
 static NAMETYPE modes[] = {
+	{"fraction",	MODE_FRAC},
 	{"frac",	MODE_FRAC},
-	{"decimal",	MODE_FRAC},
+	{"integer",	MODE_INT},
-	{"dec",		MODE_FRAC},
 	{"int",		MODE_INT},
 	{"real",	MODE_REAL},
+	{"float",	MODE_REAL},
+	{"default",	MODE_INITIAL},	/* MODE_REAL */
+	{"scientific",	MODE_EXP},
+	{"sci",		MODE_EXP},
 	{"exp",		MODE_EXP},
 	{"hexadecimal", MODE_HEX},
 	{"hex",		MODE_HEX},
@@ -158,34 +166,13 @@ static NAMETYPE modes[] = {
 };
 
 
-/*
- * Possible binary config state values
- */
-static NAMETYPE truth[] = {
-	{"y",		TRUE},
-	{"n",		FALSE},
-	{"yes",		TRUE},
-	{"no",		FALSE},
-	{"set",		TRUE},
-	{"unset",	FALSE},
-	{"on",		TRUE},
-	{"off",		FALSE},
-	{"true",	TRUE},
-	{"false",	FALSE},
-	{"t",		TRUE},
-	{"f",		FALSE},
-	{"1",		TRUE},
-	{"0",		FALSE},
-	{NULL,		0}
-};
-
-
 /*
  * Possible block base output modes
  */
 static NAMETYPE blk_base[] = {
 	{"hexadecimal", BLK_BASE_HEX},
 	{"hex",		BLK_BASE_HEX},
+	{"default",	BLK_BASE_HEX},
 	{"octal",	BLK_BASE_OCT},
 	{"oct",		BLK_BASE_OCT},
 	{"character",	BLK_BASE_CHAR},
@@ -202,17 +189,60 @@ static NAMETYPE blk_base[] = {
  * Possible block output formats
  */
 static NAMETYPE blk_fmt[] = {
-	{"line",	BLK_FMT_LINE},
 	{"lines",	BLK_FMT_LINE},
-	{"str",		BLK_FMT_STRING},
+	{"line",	BLK_FMT_LINE},
-	{"string",	BLK_FMT_STRING},
 	{"strings",	BLK_FMT_STRING},
-	{"od",		BLK_FMT_OD_STYLE},
+	{"string",	BLK_FMT_STRING},
-	{"odstyle",	BLK_FMT_OD_STYLE},
+	{"str",		BLK_FMT_STRING},
 	{"od_style",	BLK_FMT_OD_STYLE},
-	{"hd",		BLK_FMT_HD_STYLE},
+	{"odstyle",	BLK_FMT_OD_STYLE},
-	{"hdstyle",	BLK_FMT_HD_STYLE},
+	{"od",		BLK_FMT_OD_STYLE},
 	{"hd_style",	BLK_FMT_HD_STYLE},
+	{"hdstyle",	BLK_FMT_HD_STYLE},
+	{"hd",		BLK_FMT_HD_STYLE},
+	{"default",	BLK_FMT_HD_STYLE},
+	{NULL,		0}
+};
+
+
+/*
+ * Possible ctrl_d styles
+ */
+static NAMETYPE ctrl_d[] = {
+	{"virgin_eof",	CTRL_D_VIRGIN},
+	{"virgineof",	CTRL_D_VIRGIN},
+	{"virgin",	CTRL_D_VIRGIN},
+	{"default",	CTRL_D_VIRGIN},
+	{"never_eof",	CTRL_D_EMACS},
+	{"nevereof",	CTRL_D_EMACS},
+	{"never",	CTRL_D_EMACS},
+	{"empty_eof",	CTRL_D_EOF},
+	{"emptyeof",	CTRL_D_EOF},
+	{"empty",	CTRL_D_EOF},
+	{NULL,		0}
+};
+
+
+/*
+ * Possible binary config state values
+ */
+#define TRUE_STRING	"on"
+#define FALSE_STRING	"off"
+static NAMETYPE truth[] = {
+	{TRUE_STRING,	TRUE},
+	{"true",	TRUE},
+	{"t",		TRUE},
+	{"yes",		TRUE},
+	{"y",		TRUE},
+	{"set",		TRUE},
+	{"1",		TRUE},
+	{FALSE_STRING,	FALSE},
+	{"false",	FALSE},
+	{"f",		FALSE},
+	{"no",		FALSE},
+	{"n",		FALSE},
+	{"unset",	FALSE},
+	{"0",		FALSE},
 	{NULL,		0}
 };
 
@@ -220,11 +250,8 @@ static NAMETYPE blk_fmt[] = {
 /*
  * declate static functions
  */
-static int modetype(char *name);
+static long lookup_long(NAMETYPE *set, char *name);
-static int blkbase(char *name);
+static char *lookup_name(NAMETYPE *set, long val);
-static int blkfmt(char *name);
-static int truthtype(char *name);
-static char *modename(int type);
 
 
 /*
@@ -249,18 +276,21 @@ configtype(char *name)
 
 
 /*
- * Given the name of a mode, convert it to the internal format.
+ * lookup_long - given a name and a NAMETYPE, return the int
- * Returns -1 if the string is unknown.
  *
  * given:
+ *	set		the NAMESET array of name/int pairs
  *	name		mode name
+ *
+ * returns:
+ *	numeric value of the name or -1 if not found
  */
-static int
+static long
-modetype(char *name)
+lookup_long(NAMETYPE *set, char *name)
 {
 	NAMETYPE *cp;		/* current config pointer */
 
-	for (cp = modes; cp->name; cp++) {
+	for (cp = set; cp->name; cp++) {
 		if (strcmp(cp->name, name) == 0)
 			return cp->type;
 	}
@@ -269,78 +299,22 @@ modetype(char *name)
 
 
 /*
- * Given the name of a block output base, convert it to the internal format.
+ * lookup_name - given numeric value and a NAMETYPE, return the name
- * Returns -1 if the string is unknown.
  *
  * given:
- *	name			mode name
+ *	set		the NAMESET array of name/int pairs
- */
+ *	val		numeric value to lookup
-static int
-blkbase(char *name)
-{
-	NAMETYPE *cp;		/* current config pointer */
-
-	for (cp = blk_base; cp->name; cp++) {
-		if (strcmp(cp->name, name) == 0)
-			return cp->type;
-	}
-	return -1;
-}
-
-
-/*
- * Given the name of a block output format, convert it to the internal format.
- * Returns -1 if the string is unknown.
  *
- * given:
+ * returns:
- *	name			mode name
+ *	name of the value found of NULL
- */
-static int
-blkfmt(char *name)
-{
-	NAMETYPE *cp;		/* current config pointer */
-
-	for (cp = blk_fmt; cp->name; cp++) {
-		if (strcmp(cp->name, name) == 0)
-			return cp->type;
-	}
-	return -1;
-}
-
-
-/*
- * Given the name of a truth value, convert it to a BOOL or -1.
- * Returns -1 if the string is unknown.
- *
- * given:
- *	name			mode name
- */
-static int
-truthtype(char *name)
-{
-	NAMETYPE *cp;		/* current config pointer */
-
-	for (cp = truth; cp->name; cp++) {
-		if (strcmp(cp->name, name) == 0)
-			return cp->type;
-	}
-	return -1;
-}
-
-
-/*
- * Given the mode type, convert it to a string representing that mode.
- * Where there are multiple strings representing the same mode, the first
- * one in the table is used.  Returns NULL if the node type is unknown.
- * The returned string cannot be modified.
  */
 static char *
-modename(int type)
+lookup_name(NAMETYPE *set, long val)
 {
 	NAMETYPE *cp;		/* current config pointer */
 
-	for (cp = modes; cp->name; cp++) {
+	for (cp = set; cp->name; cp++) {
-		if (type == cp->type)
+		if (val == cp->type)
 			return cp->name;
 	}
 	return NULL;
@@ -417,7 +391,7 @@ setconfig(int type, VALUE *vp)
 			math_error("Non-string for mode");
 			/*NOTREACHED*/
 		}
-		temp = modetype(vp->v_str->s_str);
+		temp = lookup_long(modes, vp->v_str->s_str);
 		if (temp < 0) {
 			math_error("Unknown mode \"%s\"", vp->v_str);
 			/*NOTREACHED*/
@@ -526,7 +500,7 @@ setconfig(int type, VALUE *vp)
 			q = vp->v_num;
 			conf->tilde_ok = !qiszero(q);
 		} else if (vp->v_type == V_STR) {
-			temp = truthtype(vp->v_str->s_str);
+			temp = lookup_long(truth, vp->v_str->s_str);
 			if (temp < 0) {
 				math_error("Illegal truth value for tilde");
 				/*NOTREACHED*/
@@ -540,7 +514,7 @@ setconfig(int type, VALUE *vp)
 			q = vp->v_num;
 			conf->tab_ok = !qiszero(q);
 		} else if (vp->v_type == V_STR) {
-			temp = truthtype(vp->v_str->s_str);
+			temp = lookup_long(truth, vp->v_str->s_str);
 			if (temp < 0) {
 				math_error("Illegal truth value for tab");
 				/*NOTREACHED*/
@@ -680,7 +654,7 @@ setconfig(int type, VALUE *vp)
 			q = vp->v_num;
 			conf->leadzero = !qiszero(q);
 		} else if (vp->v_type == V_STR) {
-			temp = truthtype(vp->v_str->s_str);
+			temp = lookup_long(truth, vp->v_str->s_str);
 			if (temp < 0) { {
 				math_error("Illegal truth value for leadzero");
 				/*NOTREACHED*/
@@ -695,7 +669,7 @@ setconfig(int type, VALUE *vp)
 			q = vp->v_num;
 			conf->fullzero = !qiszero(q);
 		} else if (vp->v_type == V_STR) {
-			temp = truthtype(vp->v_str->s_str);
+			temp = lookup_long(truth, vp->v_str->s_str);
 			if (temp < 0) { {
 				math_error("Illegal truth value for fullzero");
 				/*NOTREACHED*/
@@ -772,7 +746,7 @@ setconfig(int type, VALUE *vp)
 			q = vp->v_num;
 			conf->blkverbose = !qiszero(q);
 		} else if (vp->v_type == V_STR) {
-			temp = truthtype(vp->v_str->s_str);
+			temp = lookup_long(truth, vp->v_str->s_str);
 			if (temp < 0) {
 			    math_error("Illegal truth value for blkverbose");
 			    /*NOTREACHED*/
@@ -786,7 +760,7 @@ setconfig(int type, VALUE *vp)
 			math_error("Non-string for blkbase");
 			/*NOTREACHED*/
 		}
-		temp = blkbase(vp->v_str->s_str);
+		temp = lookup_long(blk_base, vp->v_str->s_str);
 		if (temp < 0) {
 			math_error("Unknown mode \"%s\" for blkbase",
 			    vp->v_str->s_str);
@@ -800,7 +774,7 @@ setconfig(int type, VALUE *vp)
 			math_error("Non-string for blkfmt");
 			/*NOTREACHED*/
 		}
-		temp = blkfmt(vp->v_str->s_str);
+		temp = lookup_long(blk_fmt, vp->v_str->s_str);
 		if (temp < 0) {
 			math_error("Unknown mode \"%s\" for blkfmt",
 			    vp->v_str->s_str);
@@ -856,7 +830,7 @@ setconfig(int type, VALUE *vp)
 			q = vp->v_num;
 			conf->verbose_quit = !qiszero(q);
 		} else if (vp->v_type == V_STR) {
-			temp = truthtype(vp->v_str->s_str);
+			temp = lookup_long(truth, vp->v_str->s_str);
 			if (temp < 0) {
 				math_error("Illegal truth value "
 					   "for verbose_quit");
@@ -866,6 +840,20 @@ setconfig(int type, VALUE *vp)
 		}
 		break;
 
+	case CONFIG_CTRL_D:
+		if (vp->v_type != V_STR) {
+			math_error("Non-string for ctrl_d");
+			/*NOTREACHED*/
+		}
+		temp = lookup_long(ctrl_d, vp->v_str->s_str);
+		if (temp < 0) {
+			math_error("Unknown mode \"%s\" for ctrl_d",
+			    vp->v_str->s_str);
+			/*NOTREACHED*/
+		}
+		conf->ctrl_d = temp;
+		break;
+
 	default:
 		math_error("Setting illegal config parameter");
 		/*NOTREACHED*/
@@ -986,6 +974,7 @@ void
 config_value(CONFIG *cfg, int type, VALUE *vp)
 {
 	long i=0;
+	char *p;
 
 	/*
 	 * firewall
@@ -1017,7 +1006,12 @@ config_value(CONFIG *cfg, int type, VALUE *vp)
 
 	case CONFIG_MODE:
 		vp->v_type = V_STR;
-		vp->v_str = makenewstring(modename(cfg->outmode));
+		p = lookup_name(modes, cfg->outmode);
+		if (p == NULL) {
+			math_error("invalid output mode: %d", cfg->outmode);
+			/*NOTREACHED*/
+		}
+		vp->v_str = makenewstring(p);
 		return;
 
 	case CONFIG_EPSILON:
@@ -1045,12 +1039,22 @@ config_value(CONFIG *cfg, int type, VALUE *vp)
 		break;
 
 	case CONFIG_TILDE:
-		i = cfg->tilde_ok;
+		vp->v_type = V_STR;
-		break;
+		if (cfg->tilde_ok) {
+			vp->v_str = makenewstring(TRUE_STRING);
+		} else {
+			vp->v_str = makenewstring(FALSE_STRING);
+		}
+		return;
 
 	case CONFIG_TAB:
-		i = cfg->tab_ok;
+		vp->v_type = V_STR;
-		break;
+		if (cfg->tab_ok) {
+			vp->v_str = makenewstring(TRUE_STRING);
+		} else {
+			vp->v_str = makenewstring(FALSE_STRING);
+		}
+		return;
 
 	case CONFIG_QUOMOD:
 		i = cfg->quomod;
@@ -1089,12 +1093,22 @@ config_value(CONFIG *cfg, int type, VALUE *vp)
 		break;
 
 	case CONFIG_LEADZERO:
-		i = cfg->leadzero;
+		vp->v_type = V_STR;
-		break;
+		if (cfg->leadzero) {
+			vp->v_str = makenewstring(TRUE_STRING);
+		} else {
+			vp->v_str = makenewstring(FALSE_STRING);
+		}
+		return;
 
 	case CONFIG_FULLZERO:
-		i = cfg->fullzero;
+		vp->v_type = V_STR;
-		break;
+		if (cfg->fullzero) {
+			vp->v_str = makenewstring(TRUE_STRING);
+		} else {
+			vp->v_str = makenewstring(FALSE_STRING);
+		}
+		return;
 
 	case CONFIG_MAXSCAN:
 		i = cfg->maxscancount;
@@ -1115,16 +1129,33 @@ config_value(CONFIG *cfg, int type, VALUE *vp)
 		break;
 
 	case CONFIG_BLKVERBOSE:
-		i = cfg->blkverbose;
+		vp->v_type = V_STR;
-		break;
+		if (cfg->blkverbose) {
+			vp->v_str = makenewstring(TRUE_STRING);
+		} else {
+			vp->v_str = makenewstring(FALSE_STRING);
+		}
+		return;
 
 	case CONFIG_BLKBASE:
-		i = cfg->blkbase;
+		vp->v_type = V_STR;
-		break;
+		p = lookup_name(blk_base, cfg->blkbase);
+		if (p == NULL) {
+			math_error("invalid block base: %d", cfg->blkbase);
+			/*NOTREACHED*/
+		}
+		vp->v_str = makenewstring(p);
+		return;
 
 	case CONFIG_BLKFMT:
-		i = cfg->blkfmt;
+		vp->v_type = V_STR;
-		break;
+		p = lookup_name(blk_fmt, cfg->blkfmt);
+		if (p == NULL) {
+			math_error("invalid block format: %d", cfg->blkfmt);
+			/*NOTREACHED*/
+		}
+		vp->v_str = makenewstring(p);
+		return;
 
 	case CONFIG_CALC_DEBUG:
 		i = cfg->calc_debug;
@@ -1139,8 +1170,23 @@ config_value(CONFIG *cfg, int type, VALUE *vp)
 		break;
 
 	case CONFIG_VERBOSE_QUIT:
-		i = cfg->verbose_quit;
+		vp->v_type = V_STR;
-		break;
+		if (cfg->verbose_quit) {
+			vp->v_str = makenewstring(TRUE_STRING);
+		} else {
+			vp->v_str = makenewstring(FALSE_STRING);
+		}
+		return;
+
+	case CONFIG_CTRL_D:
+		vp->v_type = V_STR;
+		p = lookup_name(ctrl_d, cfg->ctrl_d);
+		if (p == NULL) {
+			math_error("invalid Control-D: %d", cfg->ctrl_d);
+			/*NOTREACHED*/
+		}
+		vp->v_str = makenewstring(p);
+		return;
 
 	default:
 		math_error("Getting illegal CONFIG element");
@@ -1218,5 +1264,6 @@ config_cmp(CONFIG *cfg1, CONFIG *cfg2)
 	       cfg1->calc_debug != cfg2->calc_debug ||
 	       cfg1->lib_debug != cfg2->lib_debug ||
 	       cfg1->user_debug != cfg2->user_debug ||
-	       cfg1->verbose_quit != cfg2->verbose_quit;
+	       cfg1->verbose_quit != cfg2->verbose_quit ||
+	       cfg1->ctrl_d != cfg2->ctrl_d;
 }

config.h

@@ -81,6 +81,7 @@
 #define CONFIG_CALC_DEBUG 31
 #define CONFIG_USER_DEBUG 32
 #define CONFIG_VERBOSE_QUIT 33
+#define CONFIG_CTRL_D 34
 
 
 /*
@@ -102,7 +103,9 @@
  *
  *	quickhash.c	- config_hash()
  *	hash.c		- hash_value()
- *	config.c	- setconfig(), config_value(), config_cmp()
+ *	config.c	- configs[], oldstd, newstd, setconfig(),
+ *			  config_value(), config_cmp()
+ *	config.h	- CONFIG_XYZ_SYMBOL (see above)
  */
 struct config {
 	int outmode;		/* current output mode */
@@ -139,6 +142,7 @@ struct config {
 	long lib_debug;		/* library debug, see LIB_DEBUG_XXX below */
 	long user_debug;	/* user defined debug value: 0 default */
 	BOOL verbose_quit;	/* TRUE => print Quit or abort executed msg */
+	int ctrl_d;		/* see CTRL_D_xyz below */
 };
 typedef struct config CONFIG;
 
@@ -148,7 +152,8 @@ typedef struct config CONFIG;
  */
 #define LIBDBG_STDIN_FUNC   (0x00000001)    /* interactive func define debug */
 #define LIBDBG_FILE_FUNC    (0x00000002)    /* file read func define debug */
-#define LIBDBG_MASK	    (0x00000003)
+#define LIBDBG_FUNC_INFO    (0x00000004)    /* print extra info for show func */
+#define LIBDBG_MASK	    (0x00000007)
 
 
 /*
@@ -162,6 +167,13 @@ typedef struct config CONFIG;
 #define CALCDBG_RUNSTATE    (0x00000020)    /* report run_state changes */
 #define CALCDBG_MASK	    (0x0000003f)
 
+/*
+ * ctrl-d meanings
+ */
+#define CTRL_D_VIRGIN	(0)	/* ^D only exits on virgin command lines */
+#define CTRL_D_EMACS	(1)	/* ^D never exits, emacs binding meaning only */
+#define CTRL_D_EOF	(2)	/* ^D always exits at start of line */
+
 
 /*
  * global configuration states and aliases

func.c

@@ -6781,14 +6781,14 @@ f_blk(int count, VALUE **vals)
 	int chunk;		/* block chunk size */
 	VALUE result;
 	int id;
-	VALUE *vp;
+	VALUE *vp = NULL;
 	int type;
 
 	/* initialize VALUE */
 	result.v_type = V_BLOCK;
 	result.v_subtype = V_NOSUBTYPE;
 
-	type = 0;
+	type = V_NULL;
 	if (count > 0) {
 		vp = *vals;
 		type = vp->v_type;

hash.c

@@ -39,6 +39,15 @@ extern void shs1_init_state(HASH*);
 extern void MD5_init_state(HASH*);
 
 
+/*
+ * hash_long can deal with BOOL's, int's, FLAGS's and LEN's
+ */
+#define hash_bool(type, val, state) (hash_long((type), (long)(val), (state)))
+#define hash_int(type, val, state) (hash_long((type), (long)(val), (state)))
+#define hash_flag(type, val, state) (hash_long((type), (long)(val), (state)))
+#define hash_len(type, val, state) (hash_long((type), (long)(val), (state)))
+
+
 /*
  * hash_setup - setup the hash state for a given hash
  */
@@ -257,6 +266,9 @@ hash_final(HASH *state)
  * This function will hash a long value as if it were a 64 bit value.
  * 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
+ * signed int's as well as FLAG's and LEN's.
  */
 HASH *
 hash_long(int type, long longval, HASH *state)
@@ -734,11 +746,10 @@ hash_value(int type, void *v, HASH *state)
 		(state->type)(value->v_type, state);
 
 		/* hash as if we have a 64 bit value */
-		state = hash_long(type, (long)value->v_int, state);
+		state = hash_int(type, value->v_int, state);
 		break;
 
 	case V_NUM:
-
 		/* hash this type */
 		state = hash_number(type, value->v_num, state);
 		break;
@@ -884,12 +895,12 @@ hash_value(int type, void *v, HASH *state)
 		(state->type)(value->v_type, state);
 
 		/* hash the RAND state */
-		state = hash_long(type, (long)value->v_rand->seeded, state);
+		state = hash_int(type, value->v_rand->seeded, state);
-		state = hash_long(type, (long)value->v_rand->bits, state);
+		state = hash_int(type, value->v_rand->bits, state);
 		(state->update)(state,
 			(USB8 *)value->v_rand->buffer, SLEN*FULL_BITS/8);
-		state = hash_long(type, (long)value->v_rand->j, state);
+		state = hash_int(type, value->v_rand->j, state);
-		state = hash_long(type, (long)value->v_rand->k, state);
+		state = hash_int(type, value->v_rand->k, state);
 		(state->update)(state,
 			(USB8 *)value->v_rand->slot, SCNT*FULL_BITS/8);
 		(state->update)(state,
@@ -903,8 +914,8 @@ hash_value(int type, void *v, HASH *state)
 		(state->type)(value->v_type, state);
 
 		/* hash the RANDOM state */
-		state = hash_long(type, (long)value->v_random->seeded, state);
+		state = hash_int(type, value->v_random->seeded, state);
-		state = hash_long(type, (long)value->v_random->bits, state);
+		state = hash_int(type, value->v_random->bits, state);
 		(state->update)(state,
 			(USB8 *)&(value->v_random->buffer), BASEB/8);
 		state = hash_zvalue(type, value->v_random->r, state);
@@ -918,20 +929,19 @@ hash_value(int type, void *v, HASH *state)
 		(state->type)(value->v_type, state);
 
 		/* hash the CONFIG state */
-		state = hash_long(type, (long)value->v_config->outmode, state);
+		state = hash_int(type, value->v_config->outmode, state);
 		state = hash_long(type,(long)value->v_config->outdigits, state);
 		state = hash_number(type, value->v_config->epsilon, state);
 		state = hash_long(type,
 			(long)value->v_config->epsilonprec, state);
-		state = hash_long(type,
+		state = hash_flag(type, value->v_config->traceflags, state);
-			(long)value->v_config->traceflags, state);
 		state = hash_long(type, (long)value->v_config->maxprint, state);
-		state = hash_long(type, (long)value->v_config->mul2, state);
+		state = hash_len(type, value->v_config->mul2, state);
-		state = hash_long(type, (long)value->v_config->sq2, state);
+		state = hash_len(type, value->v_config->sq2, state);
-		state = hash_long(type, (long)value->v_config->pow2, state);
+		state = hash_len(type, value->v_config->pow2, state);
-		state = hash_long(type, (long)value->v_config->redc2, state);
+		state = hash_len(type, value->v_config->redc2, state);
-		state = hash_long(type, (long)value->v_config->tilde_ok, state);
+		state = hash_bool(type, value->v_config->tilde_ok, state);
-		state = hash_long(type, (long)value->v_config->tab_ok, state);
+		state = hash_bool(type, value->v_config->tab_ok, state);
 		state = hash_long(type, (long)value->v_config->quomod, state);
 		state = hash_long(type, (long)value->v_config->quo, state);
 		state = hash_long(type, (long)value->v_config->mod, state);
@@ -941,28 +951,26 @@ hash_value(int type, void *v, HASH *state)
 		state = hash_long(type, (long)value->v_config->cfsim, state);
 		state = hash_long(type, (long)value->v_config->outround, state);
 		state = hash_long(type, (long)value->v_config->round, state);
-		state = hash_long(type, (long)value->v_config->leadzero, state);
+		state = hash_bool(type, value->v_config->leadzero, state);
-		state = hash_long(type, (long)value->v_config->fullzero, state);
+		state = hash_bool(type, value->v_config->fullzero, state);
 		state = hash_long(type,
 			(long)value->v_config->maxscancount, state);
 		state = hash_str(type, value->v_config->prompt1, state);
 		state->bytes = FALSE;	/* as if just read words */
 		state = hash_str(type, value->v_config->prompt2, state);
 		state->bytes = FALSE;	/* as if just read words */
-		state = hash_long(type,
+		state = hash_int(type, value->v_config->blkmaxprint, state);
-			(long)value->v_config->blkmaxprint, state);
+		state = hash_bool(type, value->v_config->blkverbose, state);
-		state = hash_long(type,
+		state = hash_int(type, value->v_config->blkbase, state);
-			(long)value->v_config->blkverbose, state);
+		state = hash_int(type, value->v_config->blkfmt, state);
-		state = hash_long(type,
-			(long)value->v_config->blkbase, state);
-		state = hash_long(type,
-			(long)value->v_config->blkfmt, state);
 		state = hash_long(type,
 			(long)value->v_config->lib_debug, state);
 		state = hash_long(type,
 			(long)value->v_config->calc_debug, state);
 		state = hash_long(type,
 			(long)value->v_config->user_debug, state);
+		state = hash_bool(type, value->v_config->verbose_quit, state);
+		state = hash_int(type, value->v_config->ctrl_d, state);
 		break;
 
 	case V_HASH:
@@ -971,11 +979,11 @@ hash_value(int type, void *v, HASH *state)
 		(state->type)(value->v_type, state);
 
 		/* hash the HASH state */
-		state = hash_long(type, (long)value->v_hash->type, state);
+		state = hash_int(type, value->v_hash->type, state);
-		state = hash_long(type, (long)value->v_hash->bytes,state);
+		state = hash_bool(type, value->v_hash->bytes,state);
-		state = hash_long(type, (long)value->v_hash->base, state);
+		state = hash_int(type, value->v_hash->base, state);
-		state = hash_long(type, (long)value->v_hash->chunksize, state);
+		state = hash_int(type, value->v_hash->chunksize, state);
-		state = hash_long(type, (long)value->v_hash->unionsize, state);
+		state = hash_int(type, value->v_hash->unionsize, state);
 		(state->update)(state,
 		    value->v_hash->h_union.data, state->unionsize);
 		state->bytes = FALSE;	/* as if reading words */

help/Makefile

@@ -67,7 +67,7 @@ BLT_HELP_FILES_9= stdlib
 
 STD_HELP_FILES_10= types usage unexpected variable
 
-BLT_HELP_FILES_11= altbind bindings custom_cal libcalc new_custom stdlib
+BLT_HELP_FILES_11= bindings custom_cal libcalc new_custom stdlib
 
 STD_HELP_FILES_12= archive
 
@@ -175,18 +175,6 @@ bindings: ../lib/bindings
 	    true; \
 	fi
 
-altbind: ../lib/altbind
-	rm -f $@
-	cp ../lib/altbind $@
-	chmod 0444 $@
-	-@if [ -z "${Q}" ]; then \
-	    echo ''; \
-	    echo '=-=-= skipping the cat of help/$@ =-=-='; \
-	    echo ''; \
-	else \
-	    true; \
-	fi
-
 stdlib: ../lib/README
 	rm -f $@
 	cp ../lib/README $@

help/base

@@ -18,19 +18,46 @@ DESCRIPTION
 
     The following convention is used to declare modes:
 
-	     base	 config
+	     base	equivalent
-	    value	 string
+		      config("mode")'s
 
-	       2	"binary"	binary fractions
+	       2	"binary"	base 2 fractions
-	       8	"octal"		octal fractions
+			"bin"
-	      10	"real"		decimal floating point
-	      16	"hex"		hexadecimal fractions
-	     -10	"int"		decimal integer
-	     1/3	"frac"		decimal fractions
-	    1e20	"exp"		decimal exponential
 
-    For convenience, any non-integer value is assumed to mean "frac",
+	       8	"octal"		base 8 fractions
-    and any integer >= 2^64 is assumed to mean "exp".
+			"oct"
+
+	      10	"real"		base 10 floating point
+			"float"
+			"default"
+
+	     -10	"integer"	base 10 integers
+			"int"
+
+	      16	"hexadecimal"	base 16 fractions
+			"hex"
+
+	     1/3	"fraction"	base 10 fractions
+			"frac"
+
+	    1e20	"scientific"	base 10 scientific notation
+			"sci"
+			"exp"
+
+    For convenience, any non-integer value is assumed to mean base 10
+    fractions and any integer >= 2^64 is assumed to mean base 10
+    scientific notation.
+
+    These base() calls have the same meaning as config("mode", "fraction"):
+
+	base(1/3)	base(0.1415)	base(16/37)
+
+    These base() calls have the same meaning as config("mode", "scientific"):
+
+	base(1e20)	base(2^64)	base(2^8191-1)
+
+    However the base() function will only return one of the base values
+    lised in the table above.
 
 EXAMPLE
     > base()

help/config

@@ -44,7 +44,7 @@ Configuration parameters
 	    "lib_debug"		controls library script debug information
 	    "user_debug"	for user defined debug information
 	    "verbose_quit"	TRUE=>print message on empty quit or abort
-
+	    "ctrl_d"		The interactive meaning of ^D (Control D)
 
     The "all" config value allows one to save/restore the configuration
     set of values.  The return of:
@@ -82,6 +82,43 @@ Configuration parameters
     startup files; newstd may also be established by invoking calc
     with the flag -n.
 
+    The following are synonyms for true:
+
+	    "on"
+	    "true"
+	    "t"
+	    "yes"
+	    "y"
+	    "set"
+	    "1"
+	    any non-zero number
+
+    The following are synonyms for false:
+
+	    "off"
+	    "false"
+	    "f"
+	    "no"
+	    "n"
+	    "unset"
+	    "0"
+	    the number zero (0)
+
+    Examples of setting some parameters are:
+
+	    config("mode", "exp");	    exponential output
+	    config("display", 50);	    50 digits of output
+	    epsilon(epsilon() / 8);	    3 bits more accuracy
+	    config("tilde", 0)		    disable roundoff tilde printing
+	    config("tab", "off")	    disable leading tab printing
+
+
+Detailed config descriptions
+
+    =-=
+
+    config("trace", bitflag)
+
     When nonzero, the "trace" parameter activates one or more features
     that may be useful for debugging.  These features correspond to
     powers of 2 which contribute additively to config("trace"):
@@ -101,6 +138,10 @@ Configuration parameters
 
     See also lib_debug, calc_debug and user_debug below for more debug levels.
 
+    =-=
+
+    config("display", int)
+
     The "display" parameter specifies the maximum number of digits after
     the decimal point to be printed in real or exponential mode in
     normal unformatted printing (print, strprint, fprint) or in
@@ -112,6 +153,11 @@ Configuration parameters
     display up to d decimal places, the type of rounding to be used is
     controlled by config("outround").
 
+    =-=
+
+    config("epsilon", real)
+    epsilon(real)
+
     The "epsilon" parameter specifies the default accuracy for the
     calculation of functions for which exact values are not possible or
     not desired.  For most functions, the
@@ -130,22 +176,58 @@ Configuration parameters
     For the transcendental functions and the functions sqrt() and
     appr(), the calculated value is always a multiple of epsilon.
 
+    =-=
+
+    config("mode", "mode_string")
+
     The "mode" parameter is a string specifying the mode for printing of
     numbers by the unformatted print functions, and the default
     ("%d" specifier) for formatted print functions.  The initial mode
     is "real".	The available modes are:
 
-	    "frac"		decimal fractions
+	  config("mode")	meaning				equivalent
-	    "int"		decimal integer
+	      string						base() call
-	    "real"		decimal floating point
+
-	    "exp"		decimal exponential
+	    "binary"		base 2 fractions		base(2)
-	    "hex"		hex fractions
+	    "bin"
-	    "oct"		octal fractions
+
-	    "bin"		binary fractions
+	    "octal"		base 8 fractions		base(8)
+	    "oct"
+
+	    "real"		base 10 floating point		base(10)
+	    "float"
+	    "default"
+
+	    "integer"		base 10 integer			base(-10)
+	    "int"
+
+	    "hexadecimal"	base 16 fractions		base(16)
+	    "hex"
+
+	    "fraction"		base 10 fractions		base(1/3)
+	    "frac"
+
+	    "scientific"	base 10 scientific notation	base(1e20)
+	    "sci"
+	    "exp"
+
+    Where multiple strings are given, the first string listed is what
+    config("mode") will return.
+
+    The default "mode" is "real".
+
+    =-=
+
+    config("maxprint", int)
 
     The "maxprint" parameter specifies the maximum number of elements to
     be displayed when a matrix or list is printed.  The initial value is 16.
 
+    =-=
+
+    config("mul2", int)
+    config("sq2", int)
+
     Mul2 and sq2 specify the sizes of numbers at which calc switches
     from its first to its second algorithm for multiplying and squaring.
     The first algorithm is the usual method of cross multiplying, which
@@ -163,6 +245,10 @@ Configuration parameters
     the parameter back to its default value.  Usually there is no need
     to change these parameters.
 
+    =-=
+
+    config("pow2", int)
+
     Pow2 specifies the sizes of numbers at which calc switches from
     its first to its second algorithm for calculating powers modulo
     another number.  The first algorithm for calculating modular powers
@@ -171,6 +257,10 @@ Configuration parameters
     which avoids divisions.  The argument for pow2 is the size of the
     modulus at which the second algorithm begins to be used.
 
+    =-=
+
+    config("redc2", int)
+
     Redc2 specifies the sizes of numbers at which calc switches from
     its first to its second algorithm when using the REDC algorithm.
     The first algorithm performs a multiply and a modular reduction
@@ -179,16 +269,36 @@ Configuration parameters
     O(N^1.585).	 The argument for redc2 is the size of the modulus at
     which the second algorithm begins to be used.
 
+    =-=
+
+    config("tilde", boolean)
+
     Config("tilde") controls whether or not a leading tilde ('~') is
     printed to indicate that a number has not been printed exactly
     because the number of decimal digits required would exceed the
     specified maximum number.  The initial "tilde" value is 1.
 
+    =-=
+
+    config("tab", boolean)
+
     Config ("tab") controls the printing of a tab before results
     automatically displayed when working interactively.	 It does not
     affect the printing by the functions print, printf, etc.  The initial
     "tab" value is 1.
 
+    =-=
+
+    config("quomod", bitflag)
+    config("quo", bitflag)
+    config("mod", bitflag)
+    config("sqrt", bitflag)
+    config("appr", bitflag)
+    config("cfappr", bitflag)
+    config("cfsim", bitflag)
+    config("outround", bitflag)
+    config("round", bitflag)
+
     The "quomod", "quo", "mod", "sqrt", "appr", "cfappr", "cfsim", and
     "round" control the way in which any necessary rounding occurs.
     Rounding occurs when for some reason, a calculated or displayed
@@ -234,11 +344,19 @@ Configuration parameters
     by the various kinds of printing to the output: bits 0, 1, 3 and 4
     are used in the same way as for the functions round and bround.
 
+    =-=
+
+    config("leadzero", bool)
+
     The "leadzero" parameter controls whether or not a 0 is printed
     before the decimal point in non-zero fractions with absolute value
     less than 1, e.g. whether 1/2 is printed as 0.5 or .5.   The
     initial value is 0, corresponding to the printing .5.
 
+    =-=
+
+    config("fullzero", bool)
+
     The "fullzero" parameter controls whether or not in decimal floating-
     point printing, the digits are padded with zeros to reach the
     number of digits specified by config("display") or by a precision
@@ -246,10 +364,18 @@ Configuration parameters
     parameter is 0, so that, for example, if config("display") >= 2,
     5/4 will print in "real" mode as 1.25.
 
+    =-=
+
+    config("maxscan", int)
+
     The maxscan value controls how many scan errors are allowed
     before the compiling phase of a computation is aborted.  The initial
     value of "maxscan" is 20.  Setting maxscan to 0 disables this feature.
 
+    =-=
+
+    config("prompt", str)
+
     The default prompt when in interactive mode is "> ".  One may change
     this prompt to a more cut-and-paste friendly prompt by:
 
@@ -259,17 +385,29 @@ Configuration parameters
     cut/copy an input line and paste it directly into input.  The
     leading ';' will be ignored.
 
+    =-=
+
+    config("more", str)
+
     When inside multi-line input, the more prompt is used.  One may
     change it by:
 
 	    config("more", ";; ")
 
+    =-=
+
+    config("blkmaxprint", int)
+
     The "blkmaxprint" config value limits the number of octets to print
     for a block.  A "blkmaxprint" of 0 means to print all octets of a
     block, regardless of size.
 
     The default is to print only the first 256 octets.
 
+    =-=
+
+    config("blkverbose", bool)
+
     The "blkverbose" determines if all lines, including duplicates
     should be printed.	If TRUE, then all lines are printed.  If false,
     duplicate lines are skipped and only a "*" is printed in a style
@@ -278,11 +416,16 @@ Configuration parameters
     The default value for "blkverbose" is FALSE: duplicate lines are
     not printed.
 
+    =-=
+
+    config("blkbase", "blkbase_string")
+
     The "blkbase" determines the base in which octets of a block
     are printed.  Possible values are:
 
 	"hexadecimal"		Octets printed in 2 digit hex
 	"hex"
+	"default"
 
 	"octal"			Octets printed in 3 digit octal
 	"oct"
@@ -296,26 +439,41 @@ Configuration parameters
 	"raw"			Octets printed as is, i.e. raw binary
 	"none"
 
-    The default "blkbase" is "hex".
+    Where multiple strings are given, the first string listed is what
+    config("blkbase") will return.
+
+    The default "blkbase" is "hexadecimal".
+
+    =-=
+
+    config("blkfmt", "blkfmt_string")
 
     The "blkfmt" determines for format of how block are printed:
 
-	"line"		print in lines of up to 79 chars + newline
+	"lines"		print in lines of up to 79 chars + newline
-	"lines"
+	"line"
 
-	"str"		print as one long string
+	"strings"	print as one long string
 	"string"
-	"strings"
+	"str"
 
-	"od"		print in od-like format, with leading offset,
+	"od_style"	print in od-like format, with leading offset,
 	"odstyle"	   followed by octets in the given base
-	"od_style"
+	"od"
 
-	"hd"		print in hex dump format, with leading offset,
+	"hd_style"	print in hex dump format, with leading offset,
 	"hdstyle"	   followed by octets in the given base, followed
-	"hd_style"	   by chars or '.' if no-printable or blank
+	"hd"		   by chars or '.' if no-printable or blank
+	"default"
 
-    The default "blkfmt" is "hd".
+    Where multiple strings are given, the first string listed is what
+    config("blkfmt") will return.
+
+    The default "blkfmt" is "hd_style".
+
+    =-=
+
+    config("calc_debug", bitflag)
 
     The "calc_debug" is intended for controlling internal calc routines
     that test its operation, or collect or display information that
@@ -352,6 +510,10 @@ Configuration parameters
     By default, "calc_debug" is 0.  The initial value may be overridden
     by the -D command line option.
 
+    =-=
+
+    config("lib_debug", bitflag)
+
     The "lib_debug" parameter is intended for controlling the possible
     display of special information relating to functions, objects, and
     other structures created by instructions in calc scripts.
@@ -369,6 +531,9 @@ Configuration parameters
 		the reading of a file, a message saying what has been done
 		is displayed.
 
+	2	Show func will display more information about a functions
+		arguments as well as more argument sdummary information.
+
     The value for config("lib_debug") in both oldstd and newstd is 3,
     but if calc is invoked with the -d flag, its initial value is zero.
     Thus, if calc is started without the -d flag, until config("lib_debug")
@@ -378,6 +543,10 @@ Configuration parameters
     By default, "lib_debug" is 3.  The -d flag changes this default to 0.
     The initial value may be overridden by the -D command line option.
 
+    =-=
+
+    config("user_debug", int)
+
     The "user_debug" is provided for use by users.  Calc ignores this value
     other than to set it to 0 by default (for both "oldstd" and "newstd").
     No calc code or shipped library should change this value.  Users
@@ -391,26 +560,44 @@ Configuration parameters
     By default, "user_debug" is 0.  The initial value may be overridden
     by the -D command line option.
 
+    =-=
+
+    config("verbose_quit", bool)
+
     The "verbose_quit" controls the print of the message:
 
 	Quit or abort executed
 
-    when a non-interactive quit or abort without an argument is encounted.
+    when a non-interactive quit or abort without an argument is encountered.
     A quit of abort without an argument does not display a message when
     invoked at the interactive level.
 
-    The following are synonyms for true:
+    =-=
 
-	"on"   "yes"   "y"   "true"   "t"   "1"	  any non-zero number
+    config("ctrl_d", "ctrl_d_string")
 
-    The following are synonyms for false:
+    The "ctrl_d" controls the interactive meaning of ^D (Control D):
 
-	"off"  "no"    "n"   "false"  "f"   "0"	  the number zero (0)
+	"virgin_eof"	If ^D is the only character that has been typed
+	"virgineof"	on a line, then calc will exit.  Otherwise ^D
+	"virgin"	will act according to the calc binding, which
+	"default"	by default is a Emacs-style delete-char.
 
-    Examples of setting some parameters are:
+	"never_eof"	The ^D never exits calc and only acts according
+	"nevereof"	calc binding, which by default is a Emacs-style
+	"never"		delete-char.
 
-	    config("mode", "exp");	    exponential output
+	"empty_eof"	The ^D always exits calc if typed on an empty line.
-	    config("display", 50);	    50 digits of output
+	"emptyeof"	This condition occurs when ^D either the first
-	    epsilon(epsilon() / 8);	    3 bits more accuracy
+	"empty"		character typed, or when all other characters on
-	    config("tilde", 0)		    disable roundoff tilde printing
+			the line have been removed (say by deleting them).
-	    config("tab", "off")	    disable leading tab printing
+
+    Where multiple strings are given, the first string listed is what
+    config("ctrl_d") will return.
+
+    Note that config("ctrl_d") actually controls each and every character
+    that is bound to ``delete_char''.  By default, ``delete_char'' is
+    Control D.  Any character(s) bound to ``delete_char'' will cause calc
+    to exit (or not exit) as directed by config("ctrl_d").
+
+    The default "ctrl_d" is "virgin_eof".

help/environment

@@ -48,8 +48,6 @@ Environment variables
 	Typically compiled in value is:
 
 		    bindings
-	or:
-		    altbind		(bindings where ^D means exit)
 
 	The bindings file is searched along the CALCPATH.  Unlike
 	the READ command, a .cal extension is not added.

help/help

@@ -30,7 +30,6 @@ following topics:
     usage		how to invoke the calc command
     variable		variables and variable declarations
 
-    altbind		alternative input & history character bindings
     bindings		input & history character bindings
     custom_cal		information about custom calc library files
     libcalc		using the arbitrary precision routines in a C program

help/todo

@@ -39,7 +39,6 @@ Very High priority items:
 	    overview		overview of calc
 	    assoc		using associations
 	    command		top level commands
-	    config		configuration parameters
 	    define		how to define functions
 	    environment		how environment variables effect calc
 	    errorcodes		calc generated error codes

hist.c

@@ -76,6 +76,7 @@ static	struct {
 	int	linelen;
 	int	histcount;
 	int	curhist;
+	BOOL	virgin_line;	/* 1 => never typed chars, 0 => chars typed */
 } HS;
 
 
@@ -250,9 +251,15 @@ static	void	insert_string(char *str, int len);
 int
 hist_getline(char *prompt, char *buf, int len)
 {
+	/*
+	 * initialize if we have not already done so
+	 */
 	if (!inited)
 		(void) hist_init(calcbindings);
 
+	/*
+	 * establish the beginning of a line condition
+	 */
 	HS.prompt = prompt;
 	HS.bufsize = len - 2;
 	HS.buf = buf;
@@ -260,19 +267,38 @@ hist_getline(char *prompt, char *buf, int len)
 	HS.end = buf;
 	HS.mark = NULL;
 	HS.linelen = -1;
+	HS.virgin_line = TRUE;
 
+	/*
+	 * prep the I/O
+	 */
 	fputs(prompt, stdout);
 	fflush(stdout);
 
+	/*
+	 * special case: non-interactive editing
+	 */
 	if (!canedit) {
 		if (fgets(buf, len, stdin) == NULL)
 			return 0;
 		return strlen(buf);
 	}
 
-	while (HS.linelen < 0)
+	/*
+	 * get the line
+	 */
+	while (HS.linelen < 0) {
+
+		/* get the next char */
 		read_key();
 
+		/* chars typed, no longer virgin */
+		HS.virgin_line = FALSE;
+	}
+
+	/*
+	 * return the line
+	 */
 	return HS.linelen;
 }
 
@@ -292,12 +318,18 @@ hist_init(char *filename)
 {
 	TTYSTRUCT	newtty;
 
+	/*
+	 * prevent multiple initializations
+	 */
 	if (inited) {
 		if (conf->calc_debug & CALCDBG_TTY)
 			printf("DEBUG: inited already set in hist_init\n");
 		return HIST_INITED;
 	}
 
+	/*
+	 * setup
+	 */
 	inited = 1;
 	canedit = 0;
 	if (conf->calc_debug & CALCDBG_TTY)
@@ -984,6 +1016,21 @@ forward_kill_char(void)
 static void
 delete_char(void)
 {
+	/*
+	 * quit delete_char (usually ^D) is at start of line and we are allowed
+	 *
+	 * We exit of start of line and config("ctrl_d", "empty") or
+	 * if config("ctrl_d", "virgin") and we have never typed on the line.
+	 */
+	if ((HS.end == HS.buf) &&
+	    (conf->ctrl_d == CTRL_D_EOF ||
+	     (conf->ctrl_d == CTRL_D_VIRGIN && HS.virgin_line == TRUE))) {
+		quit_calc();
+	}
+
+	/*
+	 * normal case: just forward_kill_char
+	 */
 	if (HS.end > HS.buf)
 		forward_kill_char();
 }

lib/Makefile

@@ -39,7 +39,7 @@ CALC_FILES= README bigprime.cal deg.cal ellip.cal lucas.cal lucas_chk.cal \
 	lucas_tbl.cal mersenne.cal mod.cal pell.cal pi.cal pix.cal \
 	pollard.cal poly.cal psqrt.cal quat.cal regress.cal solve.cal \
 	sumsq.cal surd.cal unitfrac.cal varargs.cal chrem.cal mfactor.cal \
-	bindings altbind randmprime.cal test1700.cal randrun.cal \
+	bindings randmprime.cal test1700.cal randrun.cal \
 	randbitrun.cal bernoulli.cal test2300.cal test2600.cal \
 	test2700.cal test3100.cal test3300.cal test3400.cal prompt.cal \
 	test3500.cal seedrandom.cal test4000.cal test4100.cal test4600.cal \

lib/altbind

@@ -1,49 +0,0 @@
-# Alternate key bindings for calc line editing functions
-#
-# NOTE: This facility is ignored if calc was compiled with GNU-readline.
-#	In that case, the standard readline mechanisms (see readline(3))
-#	are used in place of those found below.
-
-map	base-map
-default insert-char
-^@	set-mark
-^A	start-of-line
-^B	backward-char
-^D	quit
-^E	end-of-line
-^F	forward-char
-^H	backward-kill-char
-^J	new-line
-^K	kill-line
-^L	refresh-line
-^M	new-line
-^N	forward-history
-^O	save-line
-^P	backward-history
-^R	reverse-search
-^T	swap-chars
-^U	flush-input
-^V	quote-char
-^W	kill-region
-^Y	yank
-^?	delete-char
-^[	ignore-char	esc-map
-
-map	esc-map
-default ignore-char	base-map
-G	start-of-line
-H	backward-history
-P	forward-history
-K	backward-char
-M	forward-char
-O	end-of-line
-S	delete-char
-g	goto-line
-s	backward-word
-t	forward-word
-d	forward-kill-word
-u	uppercase-word
-l	lowercase-word
-h	list-history
-^[	flush-input
-[	arrow-key

lib/regress.cal

@@ -385,10 +385,10 @@ define test_config()
 					'516: config("pow2") == 40');
 	vrfy(config("redc2") == 50,
 					'517: config("redc2") == 50');
-	vrfy(config("tilde") == 1,
+	vrfy(config("tilde") == "on",
-					'518: config("tilde") == 1');
+					'518: config("tilde") == "on"');
-	vrfy(config("tab") == 1,
+	vrfy(config("tab") == "on",
-					'519: config("tab") == 1');
+					'519: config("tab") == "on"');
 	vrfy(config("quomod") == 0,
 					'520: config("quomod") == 0');
 	vrfy(config("quo") == 2,
@@ -407,10 +407,10 @@ define test_config()
 					'527: config("outround") == 2');
 	vrfy(config("round") == 24,
 					'528: config("round") == 24');
-	vrfy(config("leadzero") == 0,
+	vrfy(config("leadzero") == "off",
-					'529: config("leadzero") == 0');
+					'529: config("leadzero") == "off"');
-	vrfy(config("fullzero") == 0,
+	vrfy(config("fullzero") == "off",
-					'530: config("fullzero") == 0');
+					'530: config("fullzero") == "off"');
 	vrfy(config("maxscan") == 20,
 					'531: config("maxscan") == 20');
 	vrfy(config("prompt") == "> ",
@@ -426,10 +426,10 @@ define test_config()
 	vrfy(config("quo", 0) == 2,	'536: config("quo", 0) == 2');
 	vrfy(config("outround", 24) == 2,
 					'537: config("outround", 24) == 2');
-	vrfy(config("leadzero", "y") == 0,
+	vrfy(config("leadzero","y") == "off",
-					'538: config("leadzero", "y") == 0');
+					'538: config("leadzero","y") == "off"');
-	vrfy(config("fullzero", 1) == 0,
+	vrfy(config("fullzero", 1) == "off",
-					'539: config("fullzero", 1) == 0');
+					'539: config("fullzero", 1) == "off"');
 	vrfy(config("prompt", "; ") == "> ",
 					'540: config("prompt", "; ") == "> "');
 	vrfy(config("more", ";; ") == ">> ",
@@ -441,14 +441,14 @@ define test_config()
 					'543: config("all",callcfg) == newcfg');
 	vrfy(config("display",2) == 20,
 					'544: config("display",2) == 20');
-	vrfy(config("fullzero",1) == 0,
+	vrfy(config("fullzero",1) == "off",
-					'545: config("fullzero",1) == 0');
+					'545: config("fullzero",1) == "off"');
 	vrfy(strprintf("%d %d %d", 0, 1, 2) == ".00 1.00 2.00",
 		'546: strprintf("%d %d %d", 0, 1, 2) == ".00 1.00 2.00"');
 	vrfy(config("display",20) == 2,
 					'547: config("display",20) == 2');
-	vrfy(config("fullzero",0) == 1,
+	vrfy(config("fullzero",0) == "on",
-					'548: config("fullzero",0) == 1');
+					'548: config("fullzero",0) == "on"');
 	vrfy(strprintf("%d %d %d", 0, 1, 2) == "0 1 2",
 		'549: strprintf("%d %d %d", 0, 1, 2) == "0 1 2"');
 
@@ -1582,12 +1582,12 @@ define test_mode()
 
 	tmp = config("mode", "int");
 	print				'1604: tmp = config("mode", "int")';
-	vrfy(tmp == "frac",		'1605: tmp == "frac"');
+	vrfy(tmp == "fraction",		'1605: tmp == "fraction"');
 	vrfy(base() == -10,		'1606: base() == -10');
 
 	tmp = config("mode", "real");
 	print				'1607: tmp = config("mode", "real")';
-	vrfy(tmp == "int",		'1608: tmp == "int"');
+	vrfy(tmp == "integer",		'1608: tmp == "integer"');
 	vrfy(base() == 10,		'1609: base() == 10');
 
 	tmp = config("mode", "exp");
@@ -1597,7 +1597,7 @@ define test_mode()
 
 	tmp = config("mode", "hex");
 	print				'1613: tmp = config("mode", "hex")';
-	vrfy(tmp == "exp",		'1614: tmp == "exp"');
+	vrfy(tmp == "scientific",	'1614: tmp == "scientific"');
 	vrfy(base() == 16,		'1615: base() == 16');
 
 	tmp = config("mode", "oct");
@@ -1616,11 +1616,13 @@ define test_mode()
 
 	tmp = base(1/3);
 	print				'1624: tmp = base(1/3)';
-	vrfy(config("mode") == "frac",	'1625: config("mode") == "frac"');
+	vrfy(config("mode") == "fraction",
+					'1625: config("mode") == "fraction"');
 
 	tmp = base(-10);
 	print				'1626: tmp = base(-10)';
-	vrfy(config("mode") == "int",	'1627: config("mode") == "int"');
+	vrfy(config("mode") == "integer",
+					'1627: config("mode") == "integer"');
 
 	tmp = base(10);
 	print				'1628: tmp = base(10)';
@@ -1628,7 +1630,8 @@ define test_mode()
 
 	tmp = base(1e20);
 	print				'1630: tmp = base(1e20)';
-	vrfy(config("mode") == "exp",	'1631: config("mode") == "exp"');
+	vrfy(config("mode") == "scientific",
+					'1631: config("mode") == "scientific"');
 
 	tmp = base(16);
 	print				'1632: tmp = base(16)';
@@ -2705,11 +2708,11 @@ define test_matobj()
 	B[0,0] = res(2);
 	print				'3106: B[0,0] = res(2)';
 	B[0,1] = res(3);
-	print				'3107: B[0,1] = res(2)';
+	print				'3107: B[0,1] = res(3)';
 	B[1,0] = res(5);
-	print				'3108: B[1,0] = res(2)';
+	print				'3108: B[1,0] = res(5)';
 	B[1,1] = res(7);
-	print				'3109: B[1,1] = res(2)';
+	print				'3109: B[1,1] = res(7)';
 	print				'3110: md = 0';
 	md = 0;
 	vrfy(det(B) == res(-1),		'3111: det(B) == res(-1)');

nametype.h

@@ -44,7 +44,7 @@
  */
 typedef struct {
 	char *name;	/* name of configuration string */
-	int type;	/* type for configuration */
+	long type;	/* type for configuration */
 } NAMETYPE;
 
 

quickhash.c

@@ -410,6 +410,7 @@ config_hash(CONFIG *cfg, QCKHASH val)
 	value = (((value>>5) | (value<<27)) ^ (USB32)cfg->lib_debug);
 	value = (((value>>5) | (value<<27)) ^ (USB32)cfg->user_debug);
 	value = (((value>>5) | (value<<27)) ^ (USB32)cfg->verbose_quit);
+	value = (((value>>5) | (value<<27)) ^ (USB32)cfg->ctrl_d);
 
 	/*
 	 * hash the built up scalar

string.c

@@ -1086,9 +1086,8 @@ makenewstring(char *str)
 	s = stralloc();
 	s->s_str = c;
 	s->s_len = len;
-	while (len-- > 0)
+	memcpy(c, str, len);
-		*c++ = *str++;
+	c[len] = '\0';
-	*c = '\0';
 	return s;
 }
 
@@ -1097,7 +1096,7 @@ STRING *
 stringcopy (STRING *s1)
 {
 	STRING *s;
-	char *c, *c1;
+	char *c;
 	long len;
 
 	len = s1->s_len;
@@ -1111,10 +1110,8 @@ stringcopy (STRING *s1)
 	s = stralloc();
 	s->s_len = len;
 	s->s_str = c;
-	c1 = s1->s_str;
+	memcpy(c, s1->s_str, len);
-	while (len-- > 0)
+	c[len] = '\0';
-		*c++ = *c1++;
-	*c = '\0';
 	return s;
 }
 

value.c

@@ -2827,7 +2827,8 @@ config_print(CONFIG *cfg)
 	for (cp = configs; cp->name; cp++) {
 
 		/* skip if special all or duplicate maxerr value */
-		if (cp->type == CONFIG_ALL || strcmp(cp->name, "maxerr") == 0)
+		if (cp->type == CONFIG_ALL || strcmp(cp->name, "maxerr") == 0 ||
+		    strcmp(cp->name, "ctrl-d") == 0)
 			continue;
 
 		/* print tab if allowed */

version.c

@@ -18,7 +18,7 @@ static char *program;
 #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  "10.3.1"	/* test number or empty string if no patch */
+#define MINOR_PATCH  "10.4"	/* test number or empty string if no patch */
 
 /*
  * calc version constants

zmath.c

@@ -436,12 +436,10 @@ zsub(ZVALUE z1, ZVALUE z2, ZVALUE *res)
 	len1 = z1.len;
 	len2 = z2.len;
 	if (len1 == len2) {
-		h1 = z1.v + len1 - 1;
+		h1 = z1.v + len1;
-		h2 = z2.v + len2 - 1;
+		h2 = z2.v + len2;
-		while ((len1 > 0) && ((FULL)*h1 == (FULL)*h2)) {
+		while ((len1 > 0) && ((FULL)*--h1 == (FULL)*--h2)) {
 			len1--;
-			h1--;
-			h2--;
 		}
 		if (len1 == 0) {
 			*res = _zero_;
@@ -633,10 +631,12 @@ zdiv(ZVALUE z1, ZVALUE z2, ZVALUE *quo, ZVALUE *rem, long rnd)
 	A[m + 1] = 0;
 	len = m - n + 1;	/* quotient length will be len or len +/- 1 */
 	a1 = A + n;		/* start of digits for quotient */
-	b0 = B - 1;
+	b0 = B;
 	p = n;
-	while (!*++b0)		/* b0: working start for divisor */
+	while (!*b0) {		/* b0: working start for divisor */
-		p--;
+		++b0;
+		--p;
+	}
 	if (p == 1) {
 		u = *b0;
 		if (u == 1) {
@@ -893,10 +893,12 @@ zequo(ZVALUE z1, ZVALUE z2, ZVALUE *res)
 		math_error("Bad call to zequo");
 		/*NOTREACHED*/
 	}
-	B = z2.v - 1;
+	B = z2.v;
 	o = 0;
-	while (!*++B)
+	while (!*B) {
-		o++;
+		++B;
+		++o;
+	}
 	m = z1.len - o;
 	n = z2.len - o;
 	len = m - n + 1;		/* Maximum length of quotient */
@@ -1047,12 +1049,12 @@ zdivi(ZVALUE z, long n, ZVALUE *res)
 	dest.sign = z.sign;
 	dest.len = len;
 	dest.v = alloc(len);
-	h1 = z.v + len - 1;
+	h1 = z.v + len;
-	sd = dest.v + len - 1;
+	sd = dest.v + len;
 	val = 0;
 	while (len--) {
-		val = ((val << BASEB) + ((FULL) *h1--));
+		val = ((val << BASEB) + ((FULL) *--h1));
-		*sd-- = (HALF)(val / n);
+		*--sd = (HALF)(val / n);
 		val %= n;
 	}
 	zquicktrim(dest);
@@ -1111,10 +1113,10 @@ zmodi(ZVALUE z, long n)
 	 * The modulus is by a small number, so we can do this quickly.
 	 */
 	len = z.len;
-	h1 = z.v + len - 1;
+	h1 = z.v + len;
 	val = 0;
-	while (len--)
+	while (len-- > 0)
-		val = ((val << BASEB) + ((FULL) *h1--)) % n;
+		val = ((val << BASEB) + ((FULL) *--h1)) % n;
 	if (val && z.sign)
 		val = n - val;
 	return (long)val;
@@ -1784,13 +1786,12 @@ zshiftr(ZVALUE z, long n)
 	}
 	if (n) {
 		len = z.len;
-		h = z.v + len - 1;
+		h = z.v + len;
 		mask = 0;
 		while (len--) {
-			maskt = (((FULL) *h) << (BASEB - n)) & BASE1;
+			maskt = (((FULL) *--h) << (BASEB - n)) & BASE1;
 			*h = ((*h >> n) | (HALF)mask);
 			mask = maskt;
-			--h;
 		}
 	}
 }