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Fixed SDL_GameControllerMappingForGUID() crashing if no more memory available.

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The return value of SDL_malloc() was not checked and NULL therefore not handled.
NULL returned by SDL_GameControllerMapping()/SDL_GameControllerMappingForGUID()
now either means "no mapping" (as before) or "no memory" (just crashed before).
This commit is contained in:
Philipp Wiesemann 2014-10-26 23:22:53 +01:00
parent 30d6cec1bb
commit 33a2b58ca4
1 changed files with 4 additions and 0 deletions
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4
src/joystick/SDL_gamecontroller.c
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@ -735,6 +735,10 @@ SDL_GameControllerMappingForGUID(SDL_JoystickGUID guid)
/* allocate enough memory for GUID + ',' + name + ',' + mapping + \0 */ /* allocate enough memory for GUID + ',' + name + ',' + mapping + \0 */
needed = SDL_strlen(pchGUID) + 1 + SDL_strlen(mapping->name) + 1 + SDL_strlen(mapping->mapping) + 1; needed = SDL_strlen(pchGUID) + 1 + SDL_strlen(mapping->name) + 1 + SDL_strlen(mapping->mapping) + 1;
pMappingString = SDL_malloc(needed); pMappingString = SDL_malloc(needed);
if (!pMappingString) {
SDL_OutOfMemory();
return NULL;
}
SDL_snprintf(pMappingString, needed, "%s,%s,%s", pchGUID, mapping->name, mapping->mapping); SDL_snprintf(pMappingString, needed, "%s,%s,%s", pchGUID, mapping->name, mapping->mapping);
} }
return pMappingString; return pMappingString;