lib/, src/: Use stpspn() instead of its pattern

Signed-off-by: Alejandro Colomar <alx@kernel.org>

lib/fields.c

@@ -16,6 +16,7 @@
 #include <stdio.h>
 
 #include "prototypes.h"
+#include "string/strchr/stpspn.h"
 #include "string/strchr/strrspn.h"
 #include "string/strtok/stpsep.h"
 
@@ -91,12 +92,7 @@ void change_field (char *buf, size_t maxsize, const char *prompt)
 		 * entering a space.  --marekm
 		 */
 		stpcpy(strrspn(newf, " \t\n"), "");
-
-		cp = newf;
-		while (isspace (*cp)) {
-			cp++;
-		}
-
+		cp = stpspn(newf, " \t");
 		strcpy (buf, cp);
 	}
 }

lib/getdate.y

@@ -24,14 +24,15 @@
 # undef static
 #endif
 
-#include <stdio.h>
 #include <ctype.h>
+#include <stdio.h>
+#include <string.h>
 #include <time.h>
 
 #include "attr.h"
 #include "getdate.h"
+#include "string/strchr/stpspn.h"
 
-#include <string.h>
 
 /* Some old versions of bison generate parsers that use bcopy.
    That loses on systems that don't provide the function, so we have
@@ -746,8 +747,7 @@ yylex (void)
 
   for (;;)
     {
-      while (isspace (*yyInput))
-	yyInput++;
+      yyInput = stpspn(yyInput, " \t");
 
       if (isdigit (c = *yyInput) || c == '-' || c == '+')
 	{

lib/limits.c

@@ -36,6 +36,7 @@
 #include "atoi/str2i/str2s.h"
 #include "atoi/str2i/str2u.h"
 #include "string/memset/memzero.h"
+#include "string/strchr/stpspn.h"
 #include "typetraits.h"
 
 
@@ -185,11 +186,7 @@ static int do_user_limits (const char *buf, const char *name)
 	int retval = 0;
 	bool reported = false;
 
-	pp = buf;
-	/* Skip leading whitespace. */
-	while ((' ' == *pp) || ('\t' == *pp)) {
-		pp++;
-	}
+	pp = stpspn(buf, " \t");
 
 	/* The special limit string "-" results in no limit for all known
 	 * limits.
@@ -313,12 +310,7 @@ static int do_user_limits (const char *buf, const char *name)
 		 * So, let's skip all digits, "-" and our limited set of
 		 * whitespace.
 		 */
-		while (   isdigit (*pp)
-		       || ('-'  == *pp)
-		       || (' '  == *pp)
-		       || ('\t' ==*pp)) {
-			pp++;
-		}
+		pp = stpspn(pp, "0123456789- \t");
 	}
 	return retval;
 }

lib/loginprompt.c

@@ -20,6 +20,7 @@
 #include "getdef.h"
 #include "prototypes.h"
 #include "string/memset/memzero.h"
+#include "string/strchr/stpspn.h"
 #include "string/strtok/stpsep.h"
 
 
@@ -93,7 +94,7 @@ void login_prompt (char *name, int namesize)
 	 * Then copy the rest (up to the end) into the username.
 	 */
 
-	for (cp = buf; *cp == ' ' || *cp == '\t'; cp++);
+	cp = stpspn(buf, " \t");
 
 	for (i = 0; i < namesize - 1 && *cp != '\0'; name[i++] = *cp++);
 

lib/nss.c

@@ -16,6 +16,7 @@
 #include "shadowlog.h"
 #include "string/sprintf/snprintf.h"
 #include "string/strtok/stpsep.h"
+#include "string/strchr/stpspn.h"
 
 
 #define NSSWITCH "/etc/nsswitch.conf"
@@ -84,8 +85,7 @@ nss_init(const char *nsswitch_path) {
 		if (strncasecmp(line, "subid:", 6) != 0)
 			continue;
 		p = &line[6];
-		while (isspace(*p))
-			p++;
+		p = stpspn(p, " \t\n");
 		if (*p != '\0')
 			break;
 		p = NULL;

lib/setupenv.c

@@ -27,6 +27,7 @@
 #include "getdef.h"
 #include "shadowlog.h"
 #include "string/sprintf/xasprintf.h"
+#include "string/strchr/stpspn.h"
 #include "string/strdup/xstrdup.h"
 #include "string/strtok/stpsep.h"
 
@@ -58,9 +59,7 @@ static void read_env_file (const char *filename)
 
 		cp = buf;
 		/* ignore whitespace and comments */
-		while (isspace (*cp)) {
-			cp++;
-		}
+		cp = stpspn(cp, " \t");
 		if (('\0' == *cp) || ('#' == *cp)) {
 			continue;
 		}

lib/strtoday.c

@@ -14,8 +14,9 @@
 #ident "$Id$"
 
 #include "atoi/str2i/str2s.h"
-#include "prototypes.h"
 #include "getdate.h"
+#include "prototypes.h"
+#include "string/strchr/stpspn.h"
 
 
 /*
@@ -53,9 +54,7 @@ long strtoday (const char *str)
 	if ('-' == *s) {
 		s++;
 	}
-	while (' ' == *s) {
-		s++;
-	}
+	s = stpspn(s, " ");
 	while (isnum && ('\0' != *s)) {
 		if (!isdigit (*s)) {
 			isnum = false;