Readability: remove redundant cast to the same type

src/audio/SDL_audiotypecvt.c

@@ -614,7 +614,7 @@ static void SDLCALL
 SDL_Convert_F32_to_U8_SSE2(SDL_AudioCVT *cvt, SDL_AudioFormat format)
 {
     const float *src = (const float *) cvt->buf;
-    Uint8 *dst = (Uint8 *) cvt->buf;
+    Uint8 *dst = cvt->buf;
     int i;
 
     LOG_DEBUG_CONVERT("AUDIO_F32", "AUDIO_U8 (using SSE2)");

src/audio/alsa/SDL_alsa_audio.c

@@ -349,7 +349,7 @@ static void
 ALSA_PlayDevice(_THIS)
 {
     const Uint8 *sample_buf = (const Uint8 *) this->hidden->mixbuf;
-    const int frame_size = (((int) SDL_AUDIO_BITSIZE(this->spec.format)) / 8) *
+    const int frame_size = ((SDL_AUDIO_BITSIZE(this->spec.format)) / 8) *
                                 this->spec.channels;
     snd_pcm_uframes_t frames_left = ((snd_pcm_uframes_t) this->spec.samples);
 
@@ -398,7 +398,7 @@ static int
 ALSA_CaptureFromDevice(_THIS, void *buffer, int buflen)
 {
     Uint8 *sample_buf = (Uint8 *) buffer;
-    const int frame_size = (((int) SDL_AUDIO_BITSIZE(this->spec.format)) / 8) *
+    const int frame_size = ((SDL_AUDIO_BITSIZE(this->spec.format)) / 8) *
                                 this->spec.channels;
     const int total_frames = buflen / frame_size;
     snd_pcm_uframes_t frames_left = total_frames;

src/events/SDL_keyboard.c

@@ -878,7 +878,7 @@ SDL_GetKeyFromScancode(SDL_Scancode scancode)
 {
     SDL_Keyboard *keyboard = &SDL_keyboard;
 
-    if (((int)scancode) < ((int)SDL_SCANCODE_UNKNOWN) || scancode >= SDL_NUM_SCANCODES) {
+    if (((int)scancode) < SDL_SCANCODE_UNKNOWN || scancode >= SDL_NUM_SCANCODES) {
           SDL_InvalidParamError("scancode");
           return 0;
     }
@@ -905,7 +905,7 @@ const char *
 SDL_GetScancodeName(SDL_Scancode scancode)
 {
     const char *name;
-    if (((int)scancode) < ((int)SDL_SCANCODE_UNKNOWN) || scancode >= SDL_NUM_SCANCODES) {
+    if (((int)scancode) < SDL_SCANCODE_UNKNOWN || scancode >= SDL_NUM_SCANCODES) {
           SDL_InvalidParamError("scancode");
           return "";
     }

src/file/SDL_rwops.c

@@ -478,7 +478,7 @@ mem_read(SDL_RWops * context, void *ptr, size_t size, size_t maxnum)
 
     total_bytes = (maxnum * size);
     if ((maxnum <= 0) || (size <= 0)
-        || ((total_bytes / maxnum) != (size_t) size)) {
+        || ((total_bytes / maxnum) != size)) {
         return 0;
     }
 

src/filesystem/unix/SDL_sysfilesystem.c

@@ -140,7 +140,7 @@ SDL_GetBasePath(void)
         if (retval == NULL) {
             /* older kernels don't have /proc/self ... try PID version... */
             char path[64];
-            const int rc = (int) SDL_snprintf(path, sizeof(path),
+            const int rc = SDL_snprintf(path, sizeof(path),
                                               "/proc/%llu/exe",
                                               (unsigned long long) getpid());
             if ( (rc > 0) && (rc < sizeof(path)) ) {

src/stdlib/SDL_string.c

@@ -818,7 +818,7 @@ int SDL_atoi(const char *string)
 double SDL_atof(const char *string)
 {
 #ifdef HAVE_ATOF
-    return (double) atof(string);
+    return atof(string);
 #else
     return SDL_strtod(string, NULL);
 #endif /* HAVE_ATOF */

src/test/SDL_test_fuzzer.c

@@ -307,7 +307,7 @@ SDLTest_RandomUint64BoundaryValue(Uint64 boundary1, Uint64 boundary2, SDL_bool v
     /* max value for Uint64 */
     const Uint64 maxValue = UINT64_MAX;
     return SDLTest_GenerateUnsignedBoundaryValues(maxValue,
-                (Uint64) boundary1, (Uint64) boundary2,
+                boundary1, boundary2,
                 validDomain);
 }
 
@@ -457,7 +457,7 @@ SDLTest_RandomUnitFloat()
 float
 SDLTest_RandomFloat()
 {
-        return (float) (SDLTest_RandomUnitDouble() * (double)2.0 * (double)FLT_MAX - (double)(FLT_MAX));
+        return (float) (SDLTest_RandomUnitDouble() * 2.0 * (double)FLT_MAX - (double)(FLT_MAX));
 }
 
 double

src/test/SDL_test_harness.c

@@ -434,7 +434,7 @@ int SDLTest_RunSuites(SDLTest_TestSuiteReference *testSuites[], const char *user
 	/* Count the total number of tests */
     suiteCounter = 0;
     while (testSuites[suiteCounter]) {
-        testSuite=(SDLTest_TestSuiteReference *)testSuites[suiteCounter];
+        testSuite = testSuites[suiteCounter];
         suiteCounter++;
         testCounter = 0;
         while (testSuite->testCases[testCounter])
@@ -457,7 +457,7 @@ int SDLTest_RunSuites(SDLTest_TestSuiteReference *testSuites[], const char *user
         /* Loop over all suites to check if we have a filter match */
         suiteCounter = 0;
         while (testSuites[suiteCounter] && suiteFilter == 0) {
-            testSuite=(SDLTest_TestSuiteReference *)testSuites[suiteCounter];
+            testSuite = testSuites[suiteCounter];
             suiteCounter++;
             if (testSuite->name != NULL && SDL_strcmp(filter, testSuite->name) == 0) {
                 /* Matched a suite name */
@@ -496,8 +496,8 @@ int SDLTest_RunSuites(SDLTest_TestSuiteReference *testSuites[], const char *user
     /* Loop over all suites */
     suiteCounter = 0;
     while(testSuites[suiteCounter]) {
-        testSuite=(SDLTest_TestSuiteReference *)testSuites[suiteCounter];
+        testSuite = testSuites[suiteCounter];
-        currentSuiteName = (char *)((testSuite->name) ? testSuite->name : SDLTEST_INVALID_NAME_FORMAT);
+        currentSuiteName = (testSuite->name ? testSuite->name : SDLTEST_INVALID_NAME_FORMAT);
         suiteCounter++;
 
         /* Filter suite if flag set and we have a name */
@@ -527,7 +527,7 @@ int SDLTest_RunSuites(SDLTest_TestSuiteReference *testSuites[], const char *user
             while(testSuite->testCases[testCounter])
             {
                 testCase = testSuite->testCases[testCounter];
-                currentTestName = (char *)((testCase->name) ? testCase->name : SDLTEST_INVALID_NAME_FORMAT);
+                currentTestName = (testCase->name ? testCase->name : SDLTEST_INVALID_NAME_FORMAT);
                 testCounter++;
 
                 /* Filter tests if flag set and we have a name */

src/thread/pthread/SDL_systhread.c

@@ -113,7 +113,7 @@ SDL_SYS_CreateThread(SDL_Thread * thread, void *args)
     
     /* Set caller-requested stack size. Otherwise: use the system default. */
     if (thread->stacksize) {
-        pthread_attr_setstacksize(&type, (size_t) thread->stacksize);
+        pthread_attr_setstacksize(&type, thread->stacksize);
     }
 
     /* Create the thread and go! */

src/video/SDL_blit_N.c

@@ -1466,7 +1466,7 @@ Blit_RGB565_32(SDL_BlitInfo * info, const Uint32 * map)
     /* Set up some basic variables */
     width = info->dst_w;
     height = info->dst_h;
-    src = (Uint8 *) info->src;
+    src = info->src;
     srcskip = info->src_skip;
     dst = (Uint32 *) info->dst;
     dstskip = info->dst_skip / 4;

src/video/SDL_blit_slow.c

@@ -56,7 +56,7 @@ SDL_Blit_Slow(SDL_BlitInfo * info)
 
     while (info->dst_h--) {
         Uint8 *src = 0;
-        Uint8 *dst = (Uint8 *) info->dst;
+        Uint8 *dst = info->dst;
         int n = info->dst_w;
         srcx = -1;
         posx = 0x10000L;

src/video/SDL_shape.c

@@ -88,7 +88,7 @@ SDL_CalculateShapeBitmap(SDL_WindowShapeMode mode,SDL_Surface *shape,Uint8* bitm
             pixel = (Uint8 *)(shape->pixels) + (y*shape->pitch) + (x*shape->format->BytesPerPixel);
             switch(shape->format->BytesPerPixel) {
                 case(1):
-                    pixel_value = *(Uint8*)pixel;
+                    pixel_value = *pixel;
                     break;
                 case(2):
                     pixel_value = *(Uint16*)pixel;
@@ -141,7 +141,7 @@ RecursivelyCalculateShapeTree(SDL_WindowShapeMode mode,SDL_Surface* mask,SDL_Rec
             pixel = (Uint8 *)(mask->pixels) + (y*mask->pitch) + (x*mask->format->BytesPerPixel);
             switch(mask->format->BytesPerPixel) {
                 case(1):
-                    pixel_value = *(Uint8*)pixel;
+                    pixel_value = *pixel;
                     break;
                 case(2):
                     pixel_value = *(Uint16*)pixel;

src/video/wayland/SDL_waylandvulkan.c

@@ -153,7 +153,7 @@ SDL_bool Wayland_Vulkan_CreateSurface(_THIS,
         (PFN_vkGetInstanceProcAddr)_this->vulkan_config.vkGetInstanceProcAddr;
     PFN_vkCreateWaylandSurfaceKHR vkCreateWaylandSurfaceKHR =
         (PFN_vkCreateWaylandSurfaceKHR)vkGetInstanceProcAddr(
-                                            (VkInstance)instance,
+                                            instance,
                                             "vkCreateWaylandSurfaceKHR");
     VkWaylandSurfaceCreateInfoKHR createInfo;
     VkResult result;

src/video/x11/SDL_x11vulkan.c

@@ -182,7 +182,7 @@ SDL_bool X11_Vulkan_CreateSurface(_THIS,
     if(videoData->vulkan_xlib_xcb_library)
     {
         PFN_vkCreateXcbSurfaceKHR vkCreateXcbSurfaceKHR =
-            (PFN_vkCreateXcbSurfaceKHR)vkGetInstanceProcAddr((VkInstance)instance,
+            (PFN_vkCreateXcbSurfaceKHR)vkGetInstanceProcAddr(instance,
                                                              "vkCreateXcbSurfaceKHR");
         VkXcbSurfaceCreateInfoKHR createInfo;
         VkResult result;
@@ -213,7 +213,7 @@ SDL_bool X11_Vulkan_CreateSurface(_THIS,
     else
     {
         PFN_vkCreateXlibSurfaceKHR vkCreateXlibSurfaceKHR =
-            (PFN_vkCreateXlibSurfaceKHR)vkGetInstanceProcAddr((VkInstance)instance,
+            (PFN_vkCreateXlibSurfaceKHR)vkGetInstanceProcAddr(instance,
                                                               "vkCreateXlibSurfaceKHR");
         VkXlibSurfaceCreateInfoKHR createInfo;
         VkResult result;