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Diffstat (limited to 'include/iprt/sort.h')
| -rw-r--r-- | include/iprt/sort.h | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/include/iprt/sort.h b/include/iprt/sort.h new file mode 100644 index 00000000..c2c70891 --- /dev/null +++ b/include/iprt/sort.h @@ -0,0 +1,131 @@ +/** @file + * IPRT - Sorting. + */ + +/* + * Copyright (C) 2006-2020 Oracle Corporation + * + * This file is part of VirtualBox Open Source Edition (OSE), as + * available from http://www.virtualbox.org. This file is free software; + * you can redistribute it and/or modify it under the terms of the GNU + * General Public License (GPL) as published by the Free Software + * Foundation, in version 2 as it comes in the "COPYING" file of the + * VirtualBox OSE distribution. VirtualBox OSE is distributed in the + * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. + * + * The contents of this file may alternatively be used under the terms + * of the Common Development and Distribution License Version 1.0 + * (CDDL) only, as it comes in the "COPYING.CDDL" file of the + * VirtualBox OSE distribution, in which case the provisions of the + * CDDL are applicable instead of those of the GPL. + * + * You may elect to license modified versions of this file under the + * terms and conditions of either the GPL or the CDDL or both. + */ + +#ifndef IPRT_INCLUDED_sort_h +#define IPRT_INCLUDED_sort_h +#ifndef RT_WITHOUT_PRAGMA_ONCE +# pragma once +#endif + +#include <iprt/types.h> + +/** @defgroup grp_rt_sort RTSort - Sorting Algorithms + * @ingroup grp_rt + * @{ */ + +RT_C_DECLS_BEGIN + +/** + * Callback for comparing two array elements. + * + * @retval 0 if equal. + * @retval -1 if @a pvElement1 comes before @a pvElement2. + * @retval 1 if @a pvElement1 comes after @a pvElement2. + * + * @param pvElement1 The 1st element. + * @param pvElement2 The 2nd element. + * @param pvUser The user argument passed to the sorting function. + */ +typedef DECLCALLBACK(int) FNRTSORTCMP(void const *pvElement1, void const *pvElement2, void *pvUser); +/** Pointer to a compare function. */ +typedef FNRTSORTCMP *PFNRTSORTCMP; + +/** + * Sorter function for an array of variable sized elementes. + * + * @param papvArray The array to sort. + * @param cElements The number of elements in the array. + * @param cbElement The size of an array element. + * @param pfnCmp Callback function comparing two elements. + * @param pvUser User argument for the callback. + */ +typedef DECLCALLBACK(void) FNRTSORT(void *pvArray, size_t cElements, size_t cbElement, PFNRTSORTCMP pfnCmp, void *pvUser); +/** Pointer to a sorter function for an array of variable sized elements. */ +typedef FNRTSORT *PFNRTSORT; + +/** + * Pointer array sorter function. + * + * @param papvArray The array to sort. + * @param cElements The number of elements in the array. + * @param pfnCmp Callback function comparing two elements. + * @param pvUser User argument for the callback. + */ +typedef DECLCALLBACK(void) FNRTSORTAPV(void **papvArray, size_t cElements, PFNRTSORTCMP pfnCmp, void *pvUser); +/** Pointer to a pointer array sorter function. */ +typedef FNRTSORTAPV *PFNRTSORTAPV; + +/** + * Shell sort an array of variable sized elementes. + * + * @param pvArray The array to sort. + * @param cElements The number of elements in the array. + * @param cbElement The size of an array element. + * @param pfnCmp Callback function comparing two elements. + * @param pvUser User argument for the callback. + */ +RTDECL(void) RTSortShell(void *pvArray, size_t cElements, size_t cbElement, PFNRTSORTCMP pfnCmp, void *pvUser); + +/** + * Same as RTSortShell but speciallized for an array containing element + * pointers. + * + * @param papvArray The array to sort. + * @param cElements The number of elements in the array. + * @param pfnCmp Callback function comparing two elements. + * @param pvUser User argument for the callback. + */ +RTDECL(void) RTSortApvShell(void **papvArray, size_t cElements, PFNRTSORTCMP pfnCmp, void *pvUser); + +/** + * Checks if an array of variable sized elementes is sorted. + * + * @returns true if it is sorted, false if it isn't. + * @param pvArray The array to check. + * @param cElements The number of elements in the array. + * @param cbElement The size of an array element. + * @param pfnCmp Callback function comparing two elements. + * @param pvUser User argument for the callback. + */ +RTDECL(bool) RTSortIsSorted(void const *pvArray, size_t cElements, size_t cbElement, PFNRTSORTCMP pfnCmp, void *pvUser); + +/** + * Same as RTSortShell but speciallized for an array containing element + * pointers. + * + * @returns true if it is sorted, false if it isn't. + * @param papvArray The array to check. + * @param cElements The number of elements in the array. + * @param pfnCmp Callback function comparing two elements. + * @param pvUser User argument for the callback. + */ +RTDECL(bool) RTSortApvIsSorted(void const * const *papvArray, size_t cElements, PFNRTSORTCMP pfnCmp, void *pvUser); + +RT_C_DECLS_END + +/** @} */ + +#endif /* !IPRT_INCLUDED_sort_h */ + |