| 1 | /* $Id: memchr.cpp 76553 2019-01-01 01:45:53Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * IPRT - CRT Strings, memcpy().
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 2006-2019 Oracle Corporation
|
|---|
| 8 | *
|
|---|
| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
|
|---|
| 10 | * available from http://www.virtualbox.org. This file is free software;
|
|---|
| 11 | * you can redistribute it and/or modify it under the terms of the GNU
|
|---|
| 12 | * General Public License (GPL) as published by the Free Software
|
|---|
| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
|
|---|
| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
|
|---|
| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
|
|---|
| 16 | *
|
|---|
| 17 | * The contents of this file may alternatively be used under the terms
|
|---|
| 18 | * of the Common Development and Distribution License Version 1.0
|
|---|
| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
|
|---|
| 20 | * VirtualBox OSE distribution, in which case the provisions of the
|
|---|
| 21 | * CDDL are applicable instead of those of the GPL.
|
|---|
| 22 | *
|
|---|
| 23 | * You may elect to license modified versions of this file under the
|
|---|
| 24 | * terms and conditions of either the GPL or the CDDL or both.
|
|---|
| 25 | */
|
|---|
| 26 |
|
|---|
| 27 |
|
|---|
| 28 | /*********************************************************************************************************************************
|
|---|
| 29 | * Header Files *
|
|---|
| 30 | *********************************************************************************************************************************/
|
|---|
| 31 | #include <iprt/string.h>
|
|---|
| 32 |
|
|---|
| 33 |
|
|---|
| 34 | /**
|
|---|
| 35 | * Search a memory block for a character.
|
|---|
| 36 | *
|
|---|
| 37 | * @returns Pointer to the first instance of ch in pv.
|
|---|
| 38 | * @returns NULL if ch wasn't found.
|
|---|
| 39 | * @param pv Pointer to the block to search.
|
|---|
| 40 | * @param ch The character to search for.
|
|---|
| 41 | * @param cb The size of the block.
|
|---|
| 42 | */
|
|---|
| 43 | #ifdef _MSC_VER /* Silly 'safeness' from MS. */
|
|---|
| 44 | # if _MSC_VER >= 1400
|
|---|
| 45 | _CRTIMP __checkReturn _CONST_RETURN void * __cdecl memchr( __in_bcount_opt(_MaxCount) const void * pv, __in int ch, __in size_t cb)
|
|---|
| 46 | # else
|
|---|
| 47 | void *memchr(const void *pv, int ch, size_t cb)
|
|---|
| 48 | # endif
|
|---|
| 49 | #else
|
|---|
| 50 | void *memchr(const void *pv, int ch, size_t cb)
|
|---|
| 51 | #endif
|
|---|
| 52 | {
|
|---|
| 53 | register uint8_t const *pu8 = (uint8_t const *)pv;
|
|---|
| 54 | register size_t cb2 = cb;
|
|---|
| 55 | while (cb2-- > 0)
|
|---|
| 56 | {
|
|---|
| 57 | if (*pu8 == ch)
|
|---|
| 58 | return (void *)pu8;
|
|---|
| 59 | pu8++;
|
|---|
| 60 | }
|
|---|
| 61 | return NULL;
|
|---|
| 62 | }
|
|---|
| 63 |
|
|---|
