Use a new isSpace() inline function to call isspace() safely

when using a signed character pointer.

popt/poptconfig.c

@@ -30,20 +30,20 @@ static void configLine(poptContext con, char * line)
     if (strncmp(line, con->appName, nameLength)) return;
 
     line += nameLength;
-    if (*line == '\0' || !isspace(*line)) return;
+    if (*line == '\0' || !isSpace(line)) return;
 
-    while (*line != '\0' && isspace(*line)) line++;
+    while (*line != '\0' && isSpace(line)) line++;
     entryType = line;
-    while (*line == '\0' || !isspace(*line)) line++;
+    while (*line == '\0' || !isSpace(line)) line++;
     *line++ = '\0';
 
-    while (*line != '\0' && isspace(*line)) line++;
+    while (*line != '\0' && isSpace(line)) line++;
     if (*line == '\0') return;
     opt = line;
-    while (*line == '\0' || !isspace(*line)) line++;
+    while (*line == '\0' || !isSpace(line)) line++;
     *line++ = '\0';
 
-    while (*line != '\0' && isspace(*line)) line++;
+    while (*line != '\0' && isSpace(line)) line++;
     if (*line == '\0') return;
 
     /*@-temptrans@*/ /* FIX: line alias is saved */
@@ -134,7 +134,7 @@ int poptReadConfigFile(poptContext con, const char * fn)
 	  case '\n':
 	    *dst = '\0';
 	    dst = buf;
-	    while (*dst && isspace(*dst)) dst++;
+	    while (*dst && isSpace(dst)) dst++;
 	    if (*dst && *dst != '#')
 		configLine(con, dst);
 	    chptr++;

popt/popthelp.c

@@ -381,9 +381,9 @@ static void singleOptionHelp(FILE * fp, size_t maxLeftCol,
 	char format[16];
 
 	ch = help + lineLength - 1;
-	while (ch > help && !isspace(*ch)) ch--;
+	while (ch > help && !isSpace(ch)) ch--;
 	if (ch == help) break;		/* give up */
-	while (ch > (help + 1) && isspace(*ch)) ch--;
+	while (ch > (help + 1) && isSpace(ch)) ch--;
 	ch++;
 
 	snprintf(format, sizeof format, "%%.%ds\n%%%ds", (int) (ch - help), (int) indentLength);
@@ -391,7 +391,7 @@ static void singleOptionHelp(FILE * fp, size_t maxLeftCol,
 	fprintf(fp, format, help, " ");
 	/*@=formatconst@*/
 	help = ch;
-	while (isspace(*help) && *help) help++;
+	while (isSpace(help) && *help) help++;
 	helpLength = strlen(help);
     }
 /*@=boundsread@*/

popt/poptint.h

@@ -22,6 +22,12 @@ _free(/*@only@*/ /*@null@*/ const void * p)
     return NULL;
 }
 
+static inline int
+isSpace(const char *ptr)
+{
+    return isspace(*(unsigned char *)ptr);
+}
+
 /* Bit mask macros. */
 /*@-exporttype -redef @*/
 typedef	unsigned int __pbm_bits;

popt/poptparse.c

@@ -8,6 +8,8 @@
 
 #include "system.h"
 
+#include "poptint.h"
+
 #define POPT_ARGV_ARRAY_GROW_DELTA 5
 
 /*@-boundswrite@*/
@@ -81,7 +83,7 @@ int poptParseArgvString(const char * s, int * argcPtr, const char *** argvPtr)
 		if (*src != quote) *buf++ = '\\';
 	    }
 	    *buf++ = *src;
-	} else if (isspace(*src)) {
+	} else if (isSpace(src)) {
 	    if (*argv[argc] != '\0') {
 		buf++, argc++;
 		if (argc == argvAlloced) {
@@ -157,7 +159,7 @@ int poptConfigFileToString(FILE *fp, char ** argstrp, /*@unused@*/ UNUSED(int fl
 	p = line;
 
 	/* loop until first non-space char or EOL */
-	while( *p != '\0' && isspace(*p) )
+	while( *p != '\0' && isSpace(p) )
 	    p++;
 
 	linelen = strlen(p);
@@ -169,13 +171,13 @@ int poptConfigFileToString(FILE *fp, char ** argstrp, /*@unused@*/ UNUSED(int fl
 
 	q = p;
 
-	while (*q != '\0' && (!isspace(*q)) && *q != '=')
+	while (*q != '\0' && (!isSpace(q)) && *q != '=')
 	    q++;
 
-	if (isspace(*q)) {
+	if (isSpace(q)) {
 	    /* a space after the name, find next non space */
 	    *q++='\0';
-	    while( *q != '\0' && isspace((int)*q) ) q++;
+	    while( *q != '\0' && isSpace(q) ) q++;
 	}
 	if (*q == '\0') {
 	    /* single command line option (ie, no name=val, just name) */
@@ -197,14 +199,14 @@ int poptConfigFileToString(FILE *fp, char ** argstrp, /*@unused@*/ UNUSED(int fl
 	*q++ = '\0';
 
 	/* find next non-space letter of value */
-	while (*q != '\0' && isspace(*q))
+	while (*q != '\0' && isSpace(q))
 	    q++;
 	if (*q == '\0')
 	    continue;	/* XXX silently ignore missing value */
 
 	/* now, loop and strip all ending whitespace */
 	x = p + linelen;
-	while (isspace(*--x))
+	while (isSpace(--x))
 	    *x = 0;	/* null out last char if space (including fgets() NL) */
 
 	/* rest of line accept */