Yajbir Singh
128 lines
4.0 KiB
C++
128 lines
4.0 KiB
C++
/*
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* (c) Copyright Ascensio System SIA 2010-2023
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*
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* This program is a free software product. You can redistribute it and/or
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* modify it under the terms of the GNU Affero General Public License (AGPL)
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* version 3 as published by the Free Software Foundation. In accordance with
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* Section 7(a) of the GNU AGPL its Section 15 shall be amended to the effect
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* that Ascensio System SIA expressly excludes the warranty of non-infringement
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* of any third-party rights.
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*
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* This program is distributed WITHOUT ANY WARRANTY; without even the implied
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* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For
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* details, see the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
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*
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* You can contact Ascensio System SIA at 20A-6 Ernesta Birznieka-Upish
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* street, Riga, Latvia, EU, LV-1050.
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*
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* The interactive user interfaces in modified source and object code versions
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* of the Program must display Appropriate Legal Notices, as required under
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* Section 5 of the GNU AGPL version 3.
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*
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* Pursuant to Section 7(b) of the License you must retain the original Product
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* logo when distributing the program. Pursuant to Section 7(e) we decline to
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* grant you any rights under trademark law for use of our trademarks.
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*
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* All the Product's GUI elements, including illustrations and icon sets, as
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* well as technical writing content are licensed under the terms of the
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* Creative Commons Attribution-ShareAlike 4.0 International. See the License
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* terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
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*
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*/
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#ifndef _PDF_READER_MEMORY_UTILS_H
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#define _PDF_READER_MEMORY_UTILS_H
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#ifndef INT_MAX
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#define INT_MIN (-2147483647 - 1) /* minimum (signed) int value */
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#define INT_MAX 2147483647 /* maximum (signed) int value */
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#endif
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namespace PdfReader
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{
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static inline void CheckMemory(void* memory)
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{
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if (!memory)
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{
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// TODO: Выдать ошибку выделения памяти
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}
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}
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//------------------------------------------------------------------------
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// Аналогично malloc, но с обработкой ошибок.
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static void* MemUtilsMalloc(unsigned int nSize)
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{
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void* pResult;
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if (nSize == 0)
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return NULL;
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pResult = malloc(nSize);
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CheckMemory(pResult);
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return pResult;
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}
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static void* MemUtilsMallocArray(unsigned int nObjectsCount, unsigned int nObjectSize)
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{
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if (0 == nObjectsCount || 0 == nObjectSize)
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return NULL;
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if (nObjectsCount >= (UINT_MAX / nObjectSize))
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{
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CheckMemory(NULL);
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return NULL;
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}
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return MemUtilsMalloc(nObjectsCount * nObjectSize);
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}
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// Тоже что и free, но проверяет и игнорирует NULL-указатели.
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static void MemUtilsFree(void* pData)
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{
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if (pData)
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free(pData);
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}
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// Тоже что и realloc, но с обработкой ошибок.
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static void* MemUtilsRealloc(void* pData, unsigned int nSize, unsigned int nOldSize)
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{
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void* pResult;
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if (!pData || nSize == 0)
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return NULL;
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pResult = realloc(pData, nSize);
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if (!pResult)
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{
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pResult = malloc(nSize);
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if (pResult)
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{
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if (0 != nOldSize)
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memcpy(pResult, pData, nOldSize);
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free(pData);
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}
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}
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CheckMemory(pResult);
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return pResult;
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}
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static void* MemUtilsReallocArray(void* pData, unsigned int nObjectsCount, unsigned int nObjectSize, unsigned int nOldCount)
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{
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if (0 == nObjectsCount || 0 == nObjectSize)
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return NULL;
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if (nObjectsCount >= (UINT_MAX / nObjectSize))
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{
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CheckMemory(NULL);
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return NULL;
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}
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return MemUtilsRealloc(pData, nObjectsCount * nObjectSize, nOldCount * nObjectSize);
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}
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}
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#endif // _PDF_READER_MEMORY_UTILS_H
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