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Fixed crash when printing NULL wide character string

This commit is contained in:
Sam Lantinga 2020-12-03 18:16:56 -08:00
parent 754286c61c
commit f487d63a6b
1 changed files with 9 additions and 4 deletions
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5
src/stdlib/SDL_string.c
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@ -1899,10 +1899,15 @@ SDL_vsnprintf(SDL_OUT_Z_CAP(maxlen) char *text, size_t maxlen, const char *fmt,
{ {
/* In practice this is used on Windows for WCHAR strings */ /* In practice this is used on Windows for WCHAR strings */
wchar_t *wide_arg = va_arg(ap, wchar_t *); wchar_t *wide_arg = va_arg(ap, wchar_t *);
if (wide_arg) {
char *arg = SDL_iconv_string("UTF-8", "UTF-16LE", (char *)(wide_arg), (SDL_wcslen(wide_arg)+1)*sizeof(*wide_arg)); char *arg = SDL_iconv_string("UTF-8", "UTF-16LE", (char *)(wide_arg), (SDL_wcslen(wide_arg)+1)*sizeof(*wide_arg));
info.pad_zeroes = SDL_FALSE; info.pad_zeroes = SDL_FALSE;
len = SDL_PrintString(text, left, &info, arg); len = SDL_PrintString(text, left, &info, arg);
SDL_free(arg); SDL_free(arg);
} else {
info.pad_zeroes = SDL_FALSE;
len = SDL_PrintString(text, left, &info, NULL);
}
done = SDL_TRUE; done = SDL_TRUE;
} }
break; break;