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stdlib: Fixed crash on SDL_snprintf("%s", NULL).

Like other C runtimes, it should probably produce the string "(null)".

This bug probably only affected Windows, as most platforms use their standard
C runtime's snprintf().
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icculus committed Feb 14, 2017
1 parent d1eb2d1 commit c93bca489dc84a58d8b6fa524b84a4722c02f714
Showing with 4 additions and 0 deletions.
  1. +4 −0 src/stdlib/SDL_string.c
@@ -1313,6 +1313,10 @@ SDL_PrintString(char *text, size_t maxlen, SDL_FormatInfo *info, const char *str
size_t length = 0;
size_t slen;

if (string == NULL) {
string = "(null)";
}

if (info && info->width && (size_t)info->width > SDL_strlen(string)) {
char fill = info->pad_zeroes ? '0' : ' ';
size_t width = info->width - SDL_strlen(string);

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