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/*
* Copyright © 2020 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#ifndef U_QSORT_H
#define U_QSORT_H
#include <stdlib.h>
#include "detect_os.h"
#ifdef __cplusplus
extern "C" {
#endif
void util_tls_qsort_r(void *base, size_t nmemb, size_t size,
int (*compar)(const void *, const void *, void *),
void *arg);
struct util_qsort_adapter_data {
int (*compar)(const void*, const void*, void*);
void *args;
};
/**
* Converts comparison function arguments
* from [MSVC, BSD, macOS]
* (void *ctx, const void *elem1, const void *elem2)
* to [GNU, C11]
* (const void *elem1, const void *elem2, void *ctx);
*/
int util_qsort_adapter(void *ctx, const void *elem1, const void *elem2);
static inline void
util_qsort_r(void *base, size_t nmemb, size_t size,
int (*compar)(const void *, const void *, void *),
void *arg)
{
#if defined(HAVE_GNU_QSORT_R)
/* GNU extension added in glibc 2.8 */
qsort_r(base, nmemb, size, compar, arg);
#elif defined(HAVE_BSD_QSORT_R)
/* BSD/macOS qsort_r takes "arg" before the comparison function and it
* pass the "arg" before the elements.
*/
struct util_qsort_adapter_data data = {
compar,
arg
};
qsort_r(base, nmemb, size, &data, util_qsort_adapter);
#elif HAVE_QSORT_S
# ifdef _WIN32
/* MSVC/MinGW qsort_s takes "arg" after the comparison function and it
* pass the "arg" before the elements.
*/
struct util_qsort_adapter_data data = {
compar,
arg
};
qsort_s(base, nmemb, size, util_qsort_adapter, &data);
# else
/* C11 added qsort_s */
qsort_s(base, nmemb, size, compar, arg);
# endif
#else
/* Fall-back to using thread local storage */
util_tls_qsort_r(base, nmemb, size, compar, arg);
#endif
}
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* U_QSORT_H */
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