http.c: Avoid isspace(3) in get_boundary

According to POSIX.1-2008, this function is sensitive to the system
locale, which might then have different definitions for a whitespace
character.

Therefore, it is safer to only check against ' ' so as to remove such a
dependency.

1 files changed, 1 insertions, 2 deletions

diff --git a/http.c b/http.c
index e9b50ac..c3ff25a 100644
--- a/http.c
+++ b/http.c
@@ -4,7 +4,6 @@
 #include <dynstr.h>
 #include <sys/types.h>
 #include <unistd.h>
-#include <ctype.h>
 #include <errno.h>
 #include <inttypes.h>
 #include <stdbool.h>
@@ -956,7 +955,7 @@ static int get_boundary(const char *bnd, char *const buf, const size_t n)
             __func__, res, n);
         return 1;
     }
-    else if (isspace(buf[res - 1]))
+    else if (buf[res - 1] == ' ')
     {
         fprintf(stderr, "%s: boundary ends with whitespace character: %s\n",
             __func__, buf);