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Disallow non-positive allocation. 

Ensure that we're not trying to call SDL_small_alloc()
with a count of zero.

Transforming the code like this fixes a
-Wmaybe-uninitialized warning from GCC 12.0.1
This commit is contained in:
Eddy Jansson 2022-04-29 22:36:12 +02:00 committed by Sam Lantinga
parent f81419702e
commit 9e5cbf034a
1 changed files with 16 additions and 10 deletions
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26
src/render/SDL_render.c
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@ -2670,11 +2670,16 @@ static int
RenderDrawPointsWithRects(SDL_Renderer * renderer, RenderDrawPointsWithRects(SDL_Renderer * renderer,
const SDL_Point * points, const int count) const SDL_Point * points, const int count)
{ {
int retval = -1; int retval;
SDL_bool isstack; SDL_bool isstack;
SDL_FRect *frects = SDL_small_alloc(SDL_FRect, count, &isstack); SDL_FRect *frects;
int i; int i;
if (count < 1) {
return 0;
}
frects = SDL_small_alloc(SDL_FRect, count, &isstack);
if (!frects) { if (!frects) {
return SDL_OutOfMemory(); return SDL_OutOfMemory();
} }
@ -2686,9 +2691,7 @@ RenderDrawPointsWithRects(SDL_Renderer * renderer,
frects[i].h = renderer->scale.y; frects[i].h = renderer->scale.y;
} }
if (count) { retval = QueueCmdFillRects(renderer, frects, count);
retval = QueueCmdFillRects(renderer, frects, count);
}
SDL_small_free(frects, isstack); SDL_small_free(frects, isstack);
@ -2743,11 +2746,16 @@ static int
RenderDrawPointsWithRectsF(SDL_Renderer * renderer, RenderDrawPointsWithRectsF(SDL_Renderer * renderer,
const SDL_FPoint * fpoints, const int count) const SDL_FPoint * fpoints, const int count)
{ {
int retval = -1; int retval;
SDL_bool isstack; SDL_bool isstack;
SDL_FRect *frects = SDL_small_alloc(SDL_FRect, count, &isstack); SDL_FRect *frects;
int i; int i;
if (count < 1) {
return 0;
}
frects = SDL_small_alloc(SDL_FRect, count, &isstack);
if (!frects) { if (!frects) {
return SDL_OutOfMemory(); return SDL_OutOfMemory();
} }
@ -2759,9 +2767,7 @@ RenderDrawPointsWithRectsF(SDL_Renderer * renderer,
frects[i].h = renderer->scale.y; frects[i].h = renderer->scale.y;
} }
if (count) { retval = QueueCmdFillRects(renderer, frects, count);
retval = QueueCmdFillRects(renderer, frects, count);
}
SDL_small_free(frects, isstack); SDL_small_free(frects, isstack);