Don't compare pointer against '0', but NULL

Xcode-iOS/Demos/src/accelerometer.c

@@ -127,7 +127,7 @@ initializeTextures(SDL_Renderer *renderer)
 
     /* create ship texture from surface */
     ship = SDL_CreateTextureFromSurface(renderer, bmp_surface);
-    if (ship == 0) {
+    if (!ship) {
         fatalError("could not create ship texture");
     }
     SDL_SetTextureBlendMode(ship, SDL_BLENDMODE_BLEND);
@@ -145,7 +145,7 @@ initializeTextures(SDL_Renderer *renderer)
     }
     /* create space texture from surface */
     space = SDL_CreateTextureFromSurface(renderer, bmp_surface);
-    if (space == 0) {
+    if (!space) {
         fatalError("could not create space texture");
     }
     SDL_FreeSurface(bmp_surface);

Xcode-iOS/Demos/src/happy.c

@@ -117,7 +117,7 @@ initializeTexture(SDL_Renderer *renderer)
 
     /* convert RGBA surface to texture */
     texture = SDL_CreateTextureFromSurface(renderer, bmp_surface);
-    if (texture == 0) {
+    if (!texture) {
         fatalError("could not create texture");
     }
     SDL_SetTextureBlendMode(texture, SDL_BLENDMODE_BLEND);

Xcode-iOS/Demos/src/keyboard.c

@@ -183,7 +183,7 @@ loadFont(void)
         SDL_BlitSurface(surface, NULL, converted, NULL);
         /* create our texture */
         texture = SDL_CreateTextureFromSurface(renderer, converted);
-        if (texture == 0) {
+        if (!texture) {
             printf("texture creation failed: %s\n", SDL_GetError());
         } else {
             /* set blend mode for our texture */

Xcode-iOS/Demos/src/rectangles.c

@@ -58,7 +58,7 @@ main(int argc, char *argv[])
 
     /* create window and renderer */
     window = SDL_CreateWindow(NULL, 0, 0, 320, 480, SDL_WINDOW_ALLOW_HIGHDPI);
-    if (window == 0) {
+    if (!window) {
         fatalError("Could not initialize Window");
     }
     renderer = SDL_CreateRenderer(window, -1, 0);

Xcode-iOS/Demos/src/touch.c

@@ -63,7 +63,7 @@ initializeTexture(SDL_Renderer *renderer)
     brush =
         SDL_CreateTextureFromSurface(renderer, bmp_surface);
     SDL_FreeSurface(bmp_surface);
-    if (brush == 0) {
+    if (!brush) {
         fatalError("could not create brush texture");
     }
     /* additive blending -- laying strokes on top of eachother makes them brighter */

src/audio/arts/SDL_artsaudio.c

@@ -318,7 +318,7 @@ ARTS_Init(SDL_AudioDriverImpl * impl)
     if (LoadARTSLibrary() < 0) {
         return SDL_FALSE;
     } else {
-        if (SDL_NAME(arts_init) () != 0) {
+        if (SDL_NAME(arts_init) () != NULL) {
             UnloadARTSLibrary();
             SDL_SetError("ARTS: arts_init failed (no audio server?)");
             return SDL_FALSE;

src/render/ps2/SDL_render_ps2.c

@@ -546,10 +546,10 @@ PS2_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture)
     GSTEXTURE *ps2_texture = (GSTEXTURE *) texture->driverdata;
     PS2_RenderData *data = (PS2_RenderData *)renderer->driverdata;
 
-    if (data == 0)
+    if (data == NULL)
         return;
 
-    if(ps2_texture == 0)
+    if(ps2_texture == NULL)
         return;
 
     // Free from vram

src/render/psp/SDL_render_psp.c

@@ -1280,10 +1280,10 @@ PSP_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture)
     PSP_RenderData *renderdata = (PSP_RenderData *) renderer->driverdata;
     PSP_TextureData *psp_texture = (PSP_TextureData *) texture->driverdata;
 
-    if (renderdata == 0)
+    if (renderdata == NULL)
         return;
 
-    if(psp_texture == 0)
+    if(psp_texture == NULL)
         return;
 
     LRUTargetRemove(renderdata, psp_texture);

src/render/vitagxm/SDL_render_vita_gxm.c

@@ -1236,13 +1236,13 @@ VITA_GXM_DestroyTexture(SDL_Renderer *renderer, SDL_Texture *texture)
     VITA_GXM_RenderData *data = (VITA_GXM_RenderData *) renderer->driverdata;
     VITA_GXM_TextureData *vita_texture = (VITA_GXM_TextureData *) texture->driverdata;
 
-    if (data == 0)
+    if (data == NULL)
         return;
 
-    if(vita_texture == 0)
+    if(vita_texture == NULL)
         return;
 
-    if(vita_texture->tex == 0)
+    if(vita_texture->tex == NULL)
         return;
 
     sceGxmFinish(data->gxm_context);

src/stdlib/SDL_qsort.c

@@ -414,7 +414,7 @@ static void qsort_nonaligned(void *base, size_t nmemb, size_t size,
   char *first,*last;
   char *pivot=malloc(size);
   size_t trunc=TRUNC_nonaligned*size;
-  assert(pivot!=0);
+  assert(pivot);
 
   first=(char*)base; last=first+(nmemb-1)*size;
 
@@ -445,7 +445,7 @@ static void qsort_aligned(void *base, size_t nmemb, size_t size,
   char *first,*last;
   char *pivot=malloc(size);
   size_t trunc=TRUNC_aligned*size;
-  assert(pivot!=0);
+  assert(pivot);
 
   first=(char*)base; last=first+(nmemb-1)*size;
 
@@ -475,7 +475,7 @@ static void qsort_words(void *base, size_t nmemb,
   int stacktop=0;
   char *first,*last;
   char *pivot=malloc(WORD_BYTES);
-  assert(pivot!=0);
+  assert(pivot);
 
   first=(char*)base; last=first+(nmemb-1)*WORD_BYTES;
 

src/video/os2/SDL_os2dive.c

@@ -296,7 +296,7 @@ static BOOL voUpdate(PVODATA pVOData, HWND hwnd, SDL_Rect *pSDLRects,
         return FALSE;
     }
 
-    if (pSDLRects != 0) {
+    if (pSDLRects != NULL) {
         PBYTE   pbLineMask;
 
         pbLineMask = SDL_stack_alloc(BYTE, pVOData->ulHeight);

src/video/x11/SDL_x11events.c

@@ -100,7 +100,7 @@ static void X11_ReadProperty(SDL_x11Prop *p, Display *disp, Window w, Atom prop)
     int bytes_fetch = 0;
 
     do {
-        if (ret != 0) X11_XFree(ret);
+        if (ret != NULL) X11_XFree(ret);
         X11_XGetWindowProperty(disp, w, prop, 0, bytes_fetch, False, AnyPropertyType, &type, &fmt, &count, &bytes_left, &ret);
         bytes_fetch += bytes_left;
     } while (bytes_left != 0);

src/video/x11/SDL_x11window.c

@@ -1562,7 +1562,7 @@ static void X11_ReadProperty(SDL_x11Prop *p, Display *disp, Window w, Atom prop)
     int bytes_fetch = 0;
 
     do {
-        if (ret != 0) X11_XFree(ret);
+        if (ret != NULL) X11_XFree(ret);
         X11_XGetWindowProperty(disp, w, prop, 0, bytes_fetch, False, AnyPropertyType, &type, &fmt, &count, &bytes_left, &ret);
         bytes_fetch += bytes_left;
     } while (bytes_left != 0);

test/testautomation_render.c

@@ -53,7 +53,7 @@ void InitCreateRenderer(void *arg)
 
   renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);
   SDLTest_AssertPass("SDL_CreateRenderer()");
-  SDLTest_AssertCheck(renderer != 0, "Check SDL_CreateRenderer result");
+  SDLTest_AssertCheck(renderer, "Check SDL_CreateRenderer result");
   if (renderer == NULL) {
       SDL_DestroyWindow(window);
       return;