1/* 2 * Copyright © 2020 Intel Corporation 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice (including the next 12 * paragraph) shall be included in all copies or substantial portions of the 13 * Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 21 * IN THE SOFTWARE. 22 */ 23 24#ifndef U_QSORT_H 25#define U_QSORT_H 26 27#include <stdlib.h> 28 29#include "detect_os.h" 30 31#ifdef __cplusplus 32extern "C" { 33#endif 34 35void util_tls_qsort_r(void *base, size_t nmemb, size_t size, 36 int (*compar)(const void *, const void *, void *), 37 void *arg); 38 39 40struct util_qsort_adapter_data { 41 int (*compar)(const void*, const void*, void*); 42 void *args; 43}; 44 45/** 46 * Converts comparison function arguments 47 * from [MSVC, BSD, macOS] 48 * (void *ctx, const void *elem1, const void *elem2) 49 * to [GNU, C11] 50 * (const void *elem1, const void *elem2, void *ctx); 51 */ 52int util_qsort_adapter(void *ctx, const void *elem1, const void *elem2); 53 54static inline void 55util_qsort_r(void *base, size_t nmemb, size_t size, 56 int (*compar)(const void *, const void *, void *), 57 void *arg) 58{ 59#if HAVE_QSORT_R 60# if DETECT_OS_APPLE || DETECT_OS_BSD 61 /* BSD/macOS qsort_r takes "arg" before the comparison function and it 62 * pass the "arg" before the elements. 63 */ 64 struct util_qsort_adapter_data data = { 65 compar, 66 arg 67 }; 68 qsort_r(base, nmemb, size, &data, util_qsort_adapter); 69# else 70 /* GNU extension added in glibc 2.8 */ 71 qsort_r(base, nmemb, size, compar, arg); 72# endif 73#elif HAVE_QSORT_S 74# ifdef _WIN32 75 /* MSVC/MinGW qsort_s takes "arg" after the comparison function and it 76 * pass the "arg" before the elements. 77 */ 78 struct util_qsort_adapter_data data = { 79 compar, 80 arg 81 }; 82 qsort_s(base, nmemb, size, util_qsort_adapter, &data); 83# else 84 /* C11 added qsort_s */ 85 qsort_s(base, nmemb, size, compar, arg); 86# endif 87#else 88 /* Fall-back to using thread local storage */ 89 util_tls_qsort_r(base, nmemb, size, compar, arg); 90#endif 91} 92 93#ifdef __cplusplus 94} /* extern "C" */ 95#endif 96 97#endif /* U_QSORT_H */ 98