初具模型的扫雷

lib/SDL/test/testqsort.c

@@ -0,0 +1,142 @@
+/*
+  Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely.
+*/
+
+#include "SDL_test.h"
+
+static int SDLCALL
+num_compare(const void *_a, const void *_b)
+{
+    const int a = *((const int *)_a);
+    const int b = *((const int *)_b);
+    return (a < b) ? -1 : ((a > b) ? 1 : 0);
+}
+
+static void
+test_sort(const char *desc, int *nums, const int arraylen)
+{
+    int i;
+    int prev;
+
+    SDL_Log("test: %s arraylen=%d", desc, arraylen);
+
+    SDL_qsort(nums, arraylen, sizeof(nums[0]), num_compare);
+
+    prev = nums[0];
+    for (i = 1; i < arraylen; i++) {
+        const int val = nums[i];
+        if (val < prev) {
+            SDL_Log("sort is broken!");
+            return;
+        }
+        prev = val;
+    }
+}
+
+int main(int argc, char *argv[])
+{
+    SDLTest_CommonState *state;
+    static int nums[1024 * 100];
+    static const int itervals[] = { SDL_arraysize(nums), 12 };
+    int iteration;
+    int i;
+    SDL_bool custom_seed = SDL_FALSE;
+    Uint64 seed;
+    SDLTest_RandomContext rndctx;
+
+    state = SDLTest_CommonCreateState(argv, 0);
+    if (!state) {
+        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDLTest_CommonCreateState failed: %s\n", SDL_GetError());
+        return 1;
+    }
+
+    /* Enable standard application logging */
+    SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
+
+    /* Parse commandline */
+    for (i = 1; i < argc;) {
+        int consumed;
+
+        consumed = SDLTest_CommonArg(state, i);
+        if (!consumed) {
+            if (!custom_seed) {
+                int success;
+
+                if (argv[i][0] == '0' && argv[i][1] == 'x') {
+                    success = SDL_sscanf(argv[i] + 2, "%" SDL_PRIx64, &seed);
+                } else {
+                    success = SDL_sscanf(argv[i], "%" SDL_PRIu64, &seed);
+                }
+                if (!success) {
+                    SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Invalid seed. Use a decimal or hexadecimal number.\n");
+                    return 1;
+                }
+                if (seed <= ((Uint64)0xffffffff)) {
+                    SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Seed must be equal or greater than 0x100000000.\n");
+                    return 1;
+                }
+                custom_seed = SDL_TRUE;
+                consumed = 1;
+            }
+        }
+
+        if (consumed <= 0) {
+            static const char *options[] = { "[SEED]", NULL };
+            SDLTest_CommonLogUsage(state, argv[0], options);
+            return 1;
+        }
+
+        i += consumed;
+    }
+
+    if (custom_seed) {
+        SDLTest_RandomInit(&rndctx, (unsigned int)(seed >> 32), (unsigned int)(seed & 0xffffffff));
+    } else {
+        SDLTest_RandomInitTime(&rndctx);
+    }
+    SDL_Log("Using random seed 0x%08x%08x\n", rndctx.x, rndctx.c);
+
+    if (!SDLTest_CommonInit(state)) {
+        return 1;
+    }
+
+    for (iteration = 0; iteration < SDL_arraysize(itervals); iteration++) {
+        const int arraylen = itervals[iteration];
+
+        for (i = 0; i < arraylen; i++) {
+            nums[i] = i;
+        }
+        test_sort("already sorted", nums, arraylen);
+
+        for (i = 0; i < arraylen; i++) {
+            nums[i] = i;
+        }
+        nums[arraylen - 1] = -1;
+        test_sort("already sorted except last element", nums, arraylen);
+
+        for (i = 0; i < arraylen; i++) {
+            nums[i] = (arraylen - 1) - i;
+        }
+        test_sort("reverse sorted", nums, arraylen);
+
+        for (i = 0; i < arraylen; i++) {
+            nums[i] = SDLTest_RandomInt(&rndctx);
+        }
+        test_sort("random sorted", nums, arraylen);
+    }
+
+    SDLTest_CommonQuit(state);
+
+    return 0;
+}
+
+/* vi: set ts=4 sw=4 expandtab: */
+