Fix bug 4746 - introduce SDL_zeroa macro.

include/SDL_stdinc.h

@@ -415,6 +415,7 @@ extern DECLSPEC void *SDLCALL SDL_memset(SDL_OUT_BYTECAP(len) void *dst, int c,
 
 #define SDL_zero(x) SDL_memset(&(x), 0, sizeof((x)))
 #define SDL_zerop(x) SDL_memset((x), 0, sizeof(*(x)))
+#define SDL_zeroa(x) SDL_memset((x), 0, sizeof((x)))
 
 /* Note that memset() is a byte assignment and this is a 32-bit assignment, so they're not directly equivalent. */
 SDL_FORCE_INLINE void SDL_memset4(void *dst, Uint32 val, size_t dwords)

src/audio/SDL_audio.c

@@ -948,7 +948,7 @@ SDL_AudioInit(const char *driver_name)
     }
 
     SDL_zero(current_audio);
-    SDL_zero(open_devices);
+    SDL_zeroa(open_devices);
 
     /* Select the proper audio driver */
     if (driver_name == NULL) {
@@ -1608,7 +1608,7 @@ SDL_AudioQuit(void)
     SDL_DestroyMutex(current_audio.detectionLock);
 
     SDL_zero(current_audio);
-    SDL_zero(open_devices);
+    SDL_zeroa(open_devices);
 
 #ifdef HAVE_LIBSAMPLERATE_H
     UnloadLibSampleRate();

src/audio/SDL_audiocvt.c

@@ -915,7 +915,7 @@ SDL_BuildAudioCVT(SDL_AudioCVT * cvt,
     cvt->dst_format = dst_fmt;
     cvt->needed = 0;
     cvt->filter_index = 0;
-    SDL_zero(cvt->filters);
+    SDL_zeroa(cvt->filters);
     cvt->len_mult = 1;
     cvt->len_ratio = 1.0;
     cvt->rate_incr = ((double) dst_rate) / ((double) src_rate);

src/audio/SDL_wave.c

@@ -647,7 +647,7 @@ MS_ADPCM_Decode(WaveFile *file, Uint8 **audio_buf, Uint32 *audio_len)
     MS_ADPCM_ChannelState cstate[2];
 
     SDL_zero(state);
-    SDL_zero(cstate);
+    SDL_zeroa(cstate);
 
     if (chunk->size != chunk->length) {
         /* Could not read everything. Recalculate number of sample frames. */

src/joystick/SDL_gamecontroller.c

@@ -642,8 +642,8 @@ SDL_PrivateGameControllerParseControllerConfigString(SDL_GameController *gamecon
     int i = 0;
     const char *pchPos = pchString;
 
-    SDL_zero(szGameButton);
-    SDL_zero(szJoystickButton);
+    SDL_zeroa(szGameButton);
+    SDL_zeroa(szJoystickButton);
 
     while (pchPos && *pchPos) {
         if (*pchPos == ':') {
@@ -655,8 +655,8 @@ SDL_PrivateGameControllerParseControllerConfigString(SDL_GameController *gamecon
             i = 0;
             bGameButton = SDL_TRUE;
             SDL_PrivateGameControllerParseElement(gamecontroller, szGameButton, szJoystickButton);
-            SDL_zero(szGameButton);
-            SDL_zero(szJoystickButton);
+            SDL_zeroa(szGameButton);
+            SDL_zeroa(szJoystickButton);
 
         } else if (bGameButton) {
             if (i >= sizeof(szGameButton)) {