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Fixed scanning a negative number as an unsigned value 

e.g. sscanf("-1", "%zu", &v)

Thanks to @sezero for the test case
main
Sam Lantinga 2022-09-20 07:25:49 -07:00
parent 3f5c46663e
commit 2a8d00634d
1 changed files with 8 additions and 0 deletions
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8
src/stdlib/SDL_string.c
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@ -105,6 +105,10 @@ SDL_ScanUnsignedLong(const char *text, int count, int radix, unsigned long *valu
const char *textstart = text; const char *textstart = text;
unsigned long value = 0; unsigned long value = 0;
if (*text == '-') {
return SDL_ScanLong(text, count, radix, (long *)valuep);
}
if (radix == 16 && SDL_strncmp(text, "0x", 2) == 0) { if (radix == 16 && SDL_strncmp(text, "0x", 2) == 0) {
text += 2; text += 2;
} }
@ -218,6 +222,10 @@ SDL_ScanUnsignedLongLong(const char *text, int count, int radix, Uint64 * valuep
const char *textstart = text; const char *textstart = text;
Uint64 value = 0; Uint64 value = 0;
if (*text == '-') {
return SDL_ScanLongLong(text, count, radix, (Sint64 *)valuep);
}
if (radix == 16 && SDL_strncmp(text, "0x", 2) == 0) { if (radix == 16 && SDL_strncmp(text, "0x", 2) == 0) {
text += 2; text += 2;
} }