test: added SDLTest_CommonDefaultArgs()

This is for test apps that don't need custom command line arguments; it lets
us reduce the boilerplate code a tiny bit.

include/SDL_test_common.h

@@ -158,6 +158,17 @@ const char *SDLTest_CommonUsage(SDLTest_CommonState * state);
  */
 SDL_bool SDLTest_CommonInit(SDLTest_CommonState * state);
 
+/**
+ * \brief Easy argument handling when test app doesn't need any custom args.
+ *
+ * \param state The common state describing the test window to create.
+ * \param argc argc, as supplied to SDL_main
+ * \param argv argv, as supplied to SDL_main
+ *
+ * \returns False if app should quit, true otherwise.
+ */
+SDL_bool SDLTest_CommonDefaultArgs(SDLTest_CommonState * state, const int argc, char **argv);
+
 /**
  * \brief Common event handler for test windows.
  *

src/test/SDL_test_common.c

@@ -489,6 +489,21 @@ SDLTest_CommonUsage(SDLTest_CommonState * state)
     }
 }
 
+SDL_bool
+SDLTest_CommonDefaultArgs(SDLTest_CommonState *state, const int argc, char **argv)
+{
+    int i = 1;
+    while (i < argc) {
+        const int consumed = SDLTest_CommonArg(state, i);
+        if (consumed == 0) {
+            SDL_Log("Usage: %s %s\n", argv[0], SDLTest_CommonUsage(state));
+            return SDL_FALSE;
+        }
+        i += consumed;
+    }
+    return SDL_TRUE;
+}
+
 static void
 SDLTest_PrintRendererFlag(char *text, size_t maxlen, Uint32 flag)
 {

test/testgesture.c

@@ -268,9 +268,6 @@ loop(void)
 
 int main(int argc, char* argv[])
 {
-    int i;
-
-    /* !!! FIXME: there should be an SDLTest_CommonDefaultArgs() so apps don't need this. */
     state = SDLTest_CommonCreateState(argv, SDL_INIT_VIDEO);
     if (!state) {
         return 1;
@@ -281,16 +278,8 @@ int main(int argc, char* argv[])
     state->window_h = HEIGHT;
     state->skip_renderer = SDL_TRUE;
 
-    for (i = 1; i < argc;) {
-        const int consumed = SDLTest_CommonArg(state, i);
-        if (consumed == 0) {
-            SDL_Log("Usage: %s %s\n", argv[0], SDLTest_CommonUsage(state));
-            return 1;
-        }
-        i += consumed;
-    }
-
-    if (!SDLTest_CommonInit(state)) {
+    if (!SDLTest_CommonDefaultArgs(state, argc, argv) || !SDLTest_CommonInit(state)) {
+        SDLTest_CommonQuit(state);
         return 1;
     }
 

test/testrendercopyex.c

@@ -174,18 +174,10 @@ main(int argc, char *argv[])
     if (!state) {
         return 1;
     }
-    for (i = 1; i < argc;) {
-        int consumed;
 
-        consumed = SDLTest_CommonArg(state, i);
-        if (consumed == 0) {
-            SDL_Log("Usage: %s %s\n", argv[0], SDLTest_CommonUsage(state));
-            return 1;
-        }
-        i += consumed;
-    }
-    if (!SDLTest_CommonInit(state)) {
-        quit(2);
+    if (!SDLTest_CommonDefaultArgs(state, argc, argv) || !SDLTest_CommonInit(state)) {
+        SDLTest_CommonQuit(state);
+        return 1;
     }
 
     drawstates = SDL_stack_alloc(DrawState, state->num_windows);

test/testscale.c

@@ -164,18 +164,10 @@ main(int argc, char *argv[])
     if (!state) {
         return 1;
     }
-    for (i = 1; i < argc;) {
-        int consumed;
 
-        consumed = SDLTest_CommonArg(state, i);
-        if (consumed == 0) {
-            SDL_Log("Usage: %s %s\n", argv[0], SDLTest_CommonUsage(state));
-            return 1;
-        }
-        i += consumed;
-    }
-    if (!SDLTest_CommonInit(state)) {
-        quit(2);
+    if (!SDLTest_CommonDefaultArgs(state, argc, argv) || !SDLTest_CommonInit(state)) {
+        SDLTest_CommonQuit(state);
+        return 1;
     }
 
     drawstates = SDL_stack_alloc(DrawState, state->num_windows);

test/testvulkan.c

@@ -1119,7 +1119,7 @@ static SDL_bool render(void)
 int main(int argc, char *argv[])
 {
     int fsaa, accel;
-    int i, done;
+    int done;
     SDL_DisplayMode mode;
     SDL_Event event;
     Uint32 then, now, frames;
@@ -1138,27 +1138,15 @@ int main(int argc, char *argv[])
     {
         return 1;
     }
-    for(i = 1; i < argc;)
-    {
-        int consumed;
-
-        consumed = SDLTest_CommonArg(state, i);
-        if(consumed < 0)
-        {
-            SDL_Log("Usage: %s %s\n", argv[0], SDLTest_CommonUsage(state));
-            quit(1);
-        }
-        i += consumed;
-    }
 
     /* Set Vulkan parameters */
     state->window_flags |= SDL_WINDOW_VULKAN;
     state->num_windows = 1;
     state->skip_renderer = 1;
 
-    if(!SDLTest_CommonInit(state))
-    {
-        quit(2);
+    if (!SDLTest_CommonDefaultArgs(state, argc, argv) || !SDLTest_CommonInit(state)) {
+        SDLTest_CommonQuit(state);
+        return 1;
     }
 
     SDL_GetCurrentDisplayMode(0, &mode);

test/testwm2.c

@@ -129,21 +129,10 @@ main(int argc, char *argv[])
     if (!state) {
         return 1;
     }
-    for (i = 1; i < argc;) {
-        int consumed;
 
-        consumed = SDLTest_CommonArg(state, i);
-        if (consumed == 0) {
-            consumed = -1;
-        }
-        if (consumed < 0) {
-            SDL_Log("Usage: %s %s\n", argv[0], SDLTest_CommonUsage(state));
-            quit(1);
-        }
-        i += consumed;
-    }
-    if (!SDLTest_CommonInit(state)) {
-        quit(2);
+    if (!SDLTest_CommonDefaultArgs(state, argc, argv) || !SDLTest_CommonInit(state)) {
+        SDLTest_CommonQuit(state);
+        return 1;
     }
 
     SDL_EventState(SDL_DROPFILE, SDL_ENABLE);