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SDL_rwops.c: stdio_seek - skip API call for RW_SEEK_CUR with 0 offset

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Reference Issue #10556.
This commit is contained in:
ds-sloth
2024-08-16 17:12:34 -04:00
committed by GitHub
parent 8fcbf972c6
commit 2824d138b9
1 changed files with 5 additions and 1 deletions
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6
src/file/SDL_rwops.c
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@@ -369,6 +369,7 @@ stdio_size(SDL_RWops * context)
static Sint64 SDLCALL stdio_seek(SDL_RWops *context, Sint64 offset, int whence)
{
int stdiowhence;
SDL_bool is_noop;
switch (whence) {
case RW_SEEK_SET:
@@ -390,7 +391,10 @@ static Sint64 SDLCALL stdio_seek(SDL_RWops *context, Sint64 offset, int whence)
}
#endif
if (fseek(context->hidden.stdio.fp, (fseek_off_t)offset, stdiowhence) == 0) {
/* don't make a possibly-costly API call for the noop seek from SDL_RWtell */
is_noop = (whence == RW_SEEK_CUR) && (offset == 0);
if (is_noop || fseek(context->hidden.stdio.fp, (fseek_off_t)offset, stdiowhence) == 0) {
Sint64 pos = ftell(context->hidden.stdio.fp);
if (pos < 0) {
return SDL_SetError("Couldn't get stream offset");