Ensure that all uses of <ctype.h> functions are applied to unsigned-char

values, whether the local char type is signed or not.  This is necessary
for portability.  Per discussion on pghackers around 9/16/00.

contrib/fulltextindex/fti.c

@@ -1,7 +1,7 @@
 #include "postgres.h"
 #include "executor/spi.h"
 #include "commands/trigger.h"
-#include <ctype.h>				/* tolower */
+#include <ctype.h>
 #include <stdio.h>				/* debugging */
 
 /*
@@ -256,10 +256,9 @@ fti(PG_FUNCTION_ARGS)
 			char	   *string = column;
 
 			while (*string != '\0')
-			{					/* placed 'really' inline. */
-				*string = tolower(*string);		/* some compilers will
-												 * choke */
-				string++;		/* on 'inline' keyword */
+			{
+				*string = tolower((unsigned char) *string);
+				string++;
 			}
 
 			data = (struct varlena *) palloc(sizeof(int32) + strlen(column) +1);
@@ -312,9 +311,9 @@ breakup(char *string, char *substring)
 		 * (ie. 'string$%^&', last_start first points to '&', and after
 		 * this to 'g'
 		 */
-		if (!isalnum((int) *last_start))
+		if (!isalnum((unsigned char) *last_start))
 		{
-			while (!isalnum((int) *last_start) &&
+			while (!isalnum((unsigned char) *last_start) &&
 				   last_start > string)
 				last_start--;
 			cur_pos = last_start;
@@ -323,7 +322,7 @@ breakup(char *string, char *substring)
 		cur_pos--;				/* substrings are at minimum 2 characters
 								 * long */
 
-		if (isalnum((int) *cur_pos))
+		if (isalnum((unsigned char) *cur_pos))
 		{
 			/* Houston, we have a substring! :) */
 			memcpy(substring, cur_pos, last_start - cur_pos + 1);

contrib/soundex/soundex.c

@@ -1,4 +1,4 @@
-/* $Header: /cvsroot/pgsql/contrib/soundex/Attic/soundex.c,v 1.8 2000/11/20 20:36:57 tgl Exp $ */
+/* $Header: /cvsroot/pgsql/contrib/soundex/Attic/soundex.c,v 1.9 2000/12/03 20:45:31 tgl Exp $ */
 #include "postgres.h"
 #include "fmgr.h"
 #include "utils/builtins.h"
@@ -42,7 +42,7 @@ text_soundex(PG_FUNCTION_ARGS)
 
 /*                                  ABCDEFGHIJKLMNOPQRSTUVWXYZ */
 static const char *soundex_table = "01230120022455012623010202";
-#define soundex_code(letter) soundex_table[toupper(letter) - 'A']
+#define soundex_code(letter) soundex_table[toupper((unsigned char) (letter)) - 'A']
 
 
 static void
@@ -56,7 +56,7 @@ soundex(const char *instr, char *outstr)
 	outstr[SOUNDEX_LEN] = '\0';
 
 	/* Skip leading non-alphabetic characters */
-	while (!isalpha(instr[0]) && instr[0])
+	while (!isalpha((unsigned char) instr[0]) && instr[0])
 		++instr;
 
 	/* No string left */
@@ -67,12 +67,13 @@ soundex(const char *instr, char *outstr)
 	}
 
 	/* Take the first letter as is */
-	*outstr++ = (char) toupper(*instr++);
+	*outstr++ = (char) toupper((unsigned char) *instr++);
 
 	count = 1;
 	while (*instr && count < SOUNDEX_LEN)
 	{
-		if (isalpha(*instr) && soundex_code(*instr) != soundex_code(*(instr - 1)))
+		if (isalpha((unsigned char) *instr) &&
+			soundex_code(*instr) != soundex_code(*(instr - 1)))
 		{
 			*outstr = soundex_code(instr[0]);
 			if (*outstr != '0')

contrib/spi/preprocessor/step1.c

@@ -6,7 +6,7 @@ strtoupper(char *string)
 	int			i;
 
 	for (i = 0; i < strlen(string); i++)
-		string[i] = toupper(string[i]);
+		string[i] = toupper((unsigned char) string[i]);
 	return string;
 }
 

contrib/spi/refint.c

@@ -5,7 +5,7 @@
 
 #include "executor/spi.h"		/* this is what you need to work with SPI */
 #include "commands/trigger.h"	/* -"- and triggers */
-#include <ctype.h>				/* tolower () */
+#include <ctype.h>
 
 
 extern Datum check_primary_key(PG_FUNCTION_ARGS);
@@ -293,7 +293,7 @@ check_foreign_key(PG_FUNCTION_ARGS)
 	nrefs = pg_atoi(args[0], sizeof(int), 0);
 	if (nrefs < 1)
 		elog(ERROR, "check_foreign_key: %d (< 1) number of references specified", nrefs);
-	action = tolower(*(args[1]));
+	action = tolower((unsigned char) *(args[1]));
 	if (action != 'r' && action != 'c' && action != 's')
 		elog(ERROR, "check_foreign_key: invalid action %s", args[1]);
 	nargs -= 2;

contrib/spi/timetravel.c

@@ -5,7 +5,7 @@
 
 #include "executor/spi.h"		/* this is what you need to work with SPI */
 #include "commands/trigger.h"	/* -"- and triggers */
-#include <ctype.h>				/* tolower () */
+#include <ctype.h>
 
 #define ABSTIMEOID	702			/* it should be in pg_type.h */
 
@@ -376,7 +376,7 @@ set_timetravel(PG_FUNCTION_ARGS)
 													NameGetDatum(relname)));
 	d = TTOff[nTTOff] = malloc(strlen(rname) + 1);
 	while (*s)
-		*d++ = tolower(*s++);
+		*d++ = tolower((unsigned char) *s++);
 	*d = 0;
 	pfree(rname);
 	nTTOff++;

contrib/string/string_io.c

@@ -28,9 +28,10 @@
 #define DIGIT(val)	((val) + '0')
 #define ISOCTAL(c)	(((c) >= '0') && ((c) <= '7'))
 #ifndef ISO8859
-#define NOTPRINTABLE(c) (!isprint(c))
+#define NOTPRINTABLE(c) (!isprint((unsigned char) (c)))
 #else
-#define NOTPRINTABLE(c) (!isprint(c) && ((c) < 0xa0))
+#define NOTPRINTABLE(c) (!isprint((unsigned char) (c)) && \
+						 ((unsigned char) (c) < (unsigned char) 0xa0))
 #endif
 
 /*