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https://git.do.srb2.org/STJr/SRB2.git
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103 lines
2.8 KiB
C
103 lines
2.8 KiB
C
/*
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Copyright (C) 1997-2024 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely.
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*/
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#include "SDL_test.h"
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static int SDLCALL
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num_compare(const void *_a, const void *_b)
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{
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const int a = *((const int *)_a);
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const int b = *((const int *)_b);
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return (a < b) ? -1 : ((a > b) ? 1 : 0);
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}
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static void
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test_sort(const char *desc, int *nums, const int arraylen)
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{
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int i;
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int prev;
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SDL_Log("test: %s arraylen=%d", desc, arraylen);
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SDL_qsort(nums, arraylen, sizeof(nums[0]), num_compare);
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prev = nums[0];
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for (i = 1; i < arraylen; i++) {
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const int val = nums[i];
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if (val < prev) {
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SDL_Log("sort is broken!");
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return;
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}
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prev = val;
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}
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}
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int main(int argc, char *argv[])
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{
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static int nums[1024 * 100];
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static const int itervals[] = { SDL_arraysize(nums), 12 };
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int iteration;
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SDLTest_RandomContext rndctx;
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if (argc > 1) {
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int success;
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Uint64 seed = 0;
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if (argv[1][0] == '0' && argv[1][1] == 'x') {
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success = SDL_sscanf(argv[1] + 2, "%" SDL_PRIx64, &seed);
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} else {
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success = SDL_sscanf(argv[1], "%" SDL_PRIu64, &seed);
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}
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if (!success) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Invalid seed. Use a decimal or hexadecimal number.\n");
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return 1;
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}
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if (seed <= ((Uint64)0xffffffff)) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Seed must be equal or greater than 0x100000000.\n");
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return 1;
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}
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SDLTest_RandomInit(&rndctx, (unsigned int)(seed >> 32), (unsigned int)(seed & 0xffffffff));
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} else {
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SDLTest_RandomInitTime(&rndctx);
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}
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SDL_Log("Using random seed 0x%08x%08x\n", rndctx.x, rndctx.c);
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for (iteration = 0; iteration < SDL_arraysize(itervals); iteration++) {
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const int arraylen = itervals[iteration];
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int i;
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for (i = 0; i < arraylen; i++) {
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nums[i] = i;
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}
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test_sort("already sorted", nums, arraylen);
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for (i = 0; i < arraylen; i++) {
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nums[i] = i;
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}
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nums[arraylen - 1] = -1;
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test_sort("already sorted except last element", nums, arraylen);
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for (i = 0; i < arraylen; i++) {
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nums[i] = (arraylen - 1) - i;
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}
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test_sort("reverse sorted", nums, arraylen);
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for (i = 0; i < arraylen; i++) {
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nums[i] = SDLTest_RandomInt(&rndctx);
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}
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test_sort("random sorted", nums, arraylen);
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}
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return 0;
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}
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/* vi: set ts=4 sw=4 expandtab: */
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