#include "snprintf_compat.h"
+#ifndef WIN32
+#include <stdarg.h>
+#endif /* !defined(WIN32) */
+#include <stdint.h>
#include <stdlib.h>
#if !defined(HAVE_VASPRINTF)
{
#ifndef WIN32
static char _T_emptybuffer = '\0';
+ va_list ap2;
#endif /* !defined(WIN32) */
int chars;
char *b;
}
#ifdef WIN32
- chars = _vscprintf(fmt, ap) + 1;
+ chars = _vscprintf(fmt, ap);
#else /* !defined(WIN32) */
/* CAW: RAWR! We have to hope to god here that vsnprintf doesn't overwrite
- * our buffer like on some 64bit sun systems.... but hey, its time to move on
+ * our buffer like on some 64bit sun systems... but hey, it's time to move on
*/
- chars = vsnprintf(&_T_emptybuffer, 0, fmt, ap) + 1;
- if (chars < 0)
- {
- chars *= -1;
- } /* CAW: old glibc versions have this problem */
+ va_copy(ap2, ap);
+ chars = vsnprintf(&_T_emptybuffer, 0, fmt, ap2);
+ va_end(ap2);
#endif /* defined(WIN32) */
+ if (chars < 0 || (size_t)chars + 1 > SIZE_MAX / sizeof(char))
+ {
+ return -1;
+ }
- b = (char *)malloc(sizeof(char) * chars);
+ b = (char *)malloc(sizeof(char) * ((size_t)chars + 1));
if (!b)
{
return -1;