diff options
| -rw-r--r-- | src/string.cpp | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/src/string.cpp b/src/string.cpp index 2bd747535..b6e40b7b3 100644 --- a/src/string.cpp +++ b/src/string.cpp @@ -32,9 +32,9 @@ */ static int CDECL vseprintf(char *str, const char *last, const char *format, va_list ap) { - if (str >= last) return 0; - size_t size = last - str + 1; - return min((int)size, vsnprintf(str, size, format, ap)); + ptrdiff_t diff = last - str; + if (diff < 0) return 0; + return min((int)diff, vsnprintf(str, diff + 1, format, ap)); } void ttd_strlcat(char *dst, const char *src, size_t size) |