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Diffstat (limited to '')
| -rw-r--r-- | src/VBox/Runtime/common/string/memchr.cpp | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/string/memchr.cpp b/src/VBox/Runtime/common/string/memchr.cpp new file mode 100644 index 00000000..551253ea --- /dev/null +++ b/src/VBox/Runtime/common/string/memchr.cpp @@ -0,0 +1,63 @@ +/* $Id: memchr.cpp $ */ +/** @file + * IPRT - CRT Strings, memcpy(). + */ + +/* + * Copyright (C) 2006-2019 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. + */ + + +/********************************************************************************************************************************* +* Header Files * +*********************************************************************************************************************************/ +#include <iprt/string.h> + + +/** + * Search a memory block for a character. + * + * @returns Pointer to the first instance of ch in pv. + * @returns NULL if ch wasn't found. + * @param pv Pointer to the block to search. + * @param ch The character to search for. + * @param cb The size of the block. + */ +#ifdef _MSC_VER /* Silly 'safeness' from MS. */ +# if _MSC_VER >= 1400 +_CRTIMP __checkReturn _CONST_RETURN void * __cdecl memchr( __in_bcount_opt(_MaxCount) const void * pv, __in int ch, __in size_t cb) +# else +void *memchr(const void *pv, int ch, size_t cb) +# endif +#else +void *memchr(const void *pv, int ch, size_t cb) +#endif +{ + register uint8_t const *pu8 = (uint8_t const *)pv; + register size_t cb2 = cb; + while (cb2-- > 0) + { + if (*pu8 == ch) + return (void *)pu8; + pu8++; + } + return NULL; +} + |