smu

commit 6c46ee93c22968979bf5a6d5024c42247ec6ffeb
parent 37f6db9f41353d1f93c9a56f06333f2c5223c7c9
Author: Hiltjo Posthuma <hiltjo@codemadness.org>
Date:   Tue, 11 May 2021 02:21:20 +0200

fix undefined behaviour, cast for ctype functions

Diffstat:
M
smu.c
 | 
10
+++++-----

1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/smu.c b/smu.c
@@ -166,11 +166,11 @@ dohtml(const char *begin, const char *end, int newblock)
 	if (nohtml || begin + 2 >= end)
 		return 0;
 	p = begin;
-	if (p[0] != '<' || !isalpha(p[1]))
+	if (p[0] != '<' || !isalpha((unsigned char)p[1]))
 		return 0;
 	p++;
 	tag = p;
-	for (; isalnum(*p) && p < end; p++)
+	for (; isalnum((unsigned char)*p) && p < end; p++)
 		;
 	tagend = p;
 	if (p > end || tag == tagend)
@@ -296,11 +296,11 @@ dolink(const char *begin, const char *end, int newblock)
 		sep = p[0]; /* separator: can be " or ' */
 		title = p + 1;
 		/* strip trailing whitespace */
-		for (linkend = p; linkend > link && isspace(*(linkend - 1)); linkend--)
+		for (linkend = p; linkend > link && isspace((unsigned char)*(linkend - 1)); linkend--)
 			;
 		for (titleend = title; titleend < q && *titleend != sep; titleend++)
 			;
-		for (p = titleend + 1; p < end && isspace(*p); p++)
+		for (p = titleend + 1; p < end && isspace((unsigned char)*p); p++)
 			;
 		/* image dimensions */
 		if (*p == '=') {
@@ -311,7 +311,7 @@ dolink(const char *begin, const char *end, int newblock)
 		}
 	} else {
 		/* strip trailing whitespace */
-		for (linkend = q; linkend > link && isspace(*(linkend - 1)); linkend--)
+		for (linkend = q; linkend > link && isspace((unsigned char)*(linkend - 1)); linkend--)
 			;
 	}