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Fixes made in response to running a static code analyzer under MS Windows.

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Most of these are probably harmless, but the changes to SDL_immdevice.c and SDL_pixels.c appear to have fixed genuine bugs.

SDL_audiocvt.c: By separating the calculation of the divisor, I got rid of the suspicion that dividing a double by an integer led to loss of precision.
SDL_immdevice.c: Added a missing test, one that could have otherwise led to dereferencing a null pointer.
SDL_events.c, SDL_gamecontroller.c, SDL_joystick.c, SDL_malloc.c, SDL_video.c: Made it clear the return values weren't used.
SDL_hidapi_shield.c: The size is zero, so nothing bad would have happened, but the SDL_memset() was still being given an address outside of the array's range.
SDL_dinputjoystick.c: Initialize local data, just in case IDirectInputDevice8_GetProperty() isn't guaranteed to write to it.
SDL_render_sw.c: drawstate.viewport could be null (as seen on line 691).
SDL.c: SDL_MostSignificantBitIndex32() could return -1, though I don't know if you want to cope with that (what I did) or SDL_assert() that it can't happen.
SDL_hints.c: Replaced boolean tests on pointer values with comparisons to NULL.
SDL_pixels.c: Looks like the switch is genuinely missing a break!
SDL_rect_impl.h: The MacOS static checker pointed out issues with the X comparisons that were handled by assertions; I added assertions for the Y comparisons.
SDL_yuv.c, SDL_windowskeyboard.c, SDL_windowswindow.c: Checked error-result returns.
This commit is contained in:
ulatekh 2022-10-05 19:26:09 -07:00 • committed by Ryan C. Gordon
parent 7ebdae5dc9
commit ec58a817ef
17 changed files with 63 additions and 41 deletions
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14
src/render/software/SDL_render_sw.c
View file

@ -733,7 +733,7 @@ SW_RunCommandQueue(SDL_Renderer * renderer, SDL_RenderCommand *cmd, void *vertic
SetDrawState(surface, &drawstate);
/* Apply viewport */
if (drawstate.viewport->x || drawstate.viewport->y) {
if (drawstate.viewport != NULL && (drawstate.viewport->x || drawstate.viewport->y)) {
int i;
for (i = 0; i < count; i++) {
verts[i].x += drawstate.viewport->x;
@ -760,7 +760,7 @@ SW_RunCommandQueue(SDL_Renderer * renderer, SDL_RenderCommand *cmd, void *vertic
SetDrawState(surface, &drawstate);
/* Apply viewport */
if (drawstate.viewport->x || drawstate.viewport->y) {
if (drawstate.viewport != NULL && (drawstate.viewport->x || drawstate.viewport->y)) {
int i;
for (i = 0; i < count; i++) {
verts[i].x += drawstate.viewport->x;
@ -787,7 +787,7 @@ SW_RunCommandQueue(SDL_Renderer * renderer, SDL_RenderCommand *cmd, void *vertic
SetDrawState(surface, &drawstate);
/* Apply viewport */
if (drawstate.viewport->x || drawstate.viewport->y) {
if (drawstate.viewport != NULL && (drawstate.viewport->x || drawstate.viewport->y)) {
int i;
for (i = 0; i < count; i++) {
verts[i].x += drawstate.viewport->x;
@ -815,7 +815,7 @@ SW_RunCommandQueue(SDL_Renderer * renderer, SDL_RenderCommand *cmd, void *vertic
PrepTextureForCopy(cmd);
/* Apply viewport */
if (drawstate.viewport->x || drawstate.viewport->y) {
if (drawstate.viewport != NULL && (drawstate.viewport->x || drawstate.viewport->y)) {
dstrect->x += drawstate.viewport->x;
dstrect->y += drawstate.viewport->y;
}
@ -873,7 +873,7 @@ SW_RunCommandQueue(SDL_Renderer * renderer, SDL_RenderCommand *cmd, void *vertic
PrepTextureForCopy(cmd);
/* Apply viewport */
if (drawstate.viewport->x || drawstate.viewport->y) {
if (drawstate.viewport != NULL && (drawstate.viewport->x || drawstate.viewport->y)) {
copydata->dstrect.x += drawstate.viewport->x;
copydata->dstrect.y += drawstate.viewport->y;
}
@ -901,7 +901,7 @@ SW_RunCommandQueue(SDL_Renderer * renderer, SDL_RenderCommand *cmd, void *vertic
PrepTextureForCopy(cmd);
/* Apply viewport */
if (drawstate.viewport->x || drawstate.viewport->y) {
if (drawstate.viewport != NULL && (drawstate.viewport->x || drawstate.viewport->y)) {
SDL_Point vp;
vp.x = drawstate.viewport->x;
vp.y = drawstate.viewport->y;
@ -924,7 +924,7 @@ SW_RunCommandQueue(SDL_Renderer * renderer, SDL_RenderCommand *cmd, void *vertic
GeometryFillData *ptr = (GeometryFillData *) verts;
/* Apply viewport */
if (drawstate.viewport->x || drawstate.viewport->y) {
if (drawstate.viewport != NULL && (drawstate.viewport->x || drawstate.viewport->y)) {
SDL_Point vp;
vp.x = drawstate.viewport->x;
vp.y = drawstate.viewport->y;