| 1 | /* $Id: memchr.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * IPRT - CRT Strings, memcpy().
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 2006-2023 Oracle and/or its affiliates.
|
|---|
| 8 | *
|
|---|
| 9 | * This file is part of VirtualBox base platform packages, as
|
|---|
| 10 | * available from https://www.virtualbox.org.
|
|---|
| 11 | *
|
|---|
| 12 | * This program is free software; you can redistribute it and/or
|
|---|
| 13 | * modify it under the terms of the GNU General Public License
|
|---|
| 14 | * as published by the Free Software Foundation, in version 3 of the
|
|---|
| 15 | * License.
|
|---|
| 16 | *
|
|---|
| 17 | * This program is distributed in the hope that it will be useful, but
|
|---|
| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
|
|---|
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|---|
| 20 | * General Public License for more details.
|
|---|
| 21 | *
|
|---|
| 22 | * You should have received a copy of the GNU General Public License
|
|---|
| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
|
|---|
| 24 | *
|
|---|
| 25 | * The contents of this file may alternatively be used under the terms
|
|---|
| 26 | * of the Common Development and Distribution License Version 1.0
|
|---|
| 27 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
|
|---|
| 28 | * in the VirtualBox distribution, in which case the provisions of the
|
|---|
| 29 | * CDDL are applicable instead of those of the GPL.
|
|---|
| 30 | *
|
|---|
| 31 | * You may elect to license modified versions of this file under the
|
|---|
| 32 | * terms and conditions of either the GPL or the CDDL or both.
|
|---|
| 33 | *
|
|---|
| 34 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
|
|---|
| 35 | */
|
|---|
| 36 |
|
|---|
| 37 |
|
|---|
| 38 | /*********************************************************************************************************************************
|
|---|
| 39 | * Header Files *
|
|---|
| 40 | *********************************************************************************************************************************/
|
|---|
| 41 | #include "internal/iprt.h"
|
|---|
| 42 | #include <iprt/string.h>
|
|---|
| 43 |
|
|---|
| 44 |
|
|---|
| 45 | /**
|
|---|
| 46 | * Search a memory block for a character.
|
|---|
| 47 | *
|
|---|
| 48 | * @returns Pointer to the first instance of ch in pv.
|
|---|
| 49 | * @returns NULL if ch wasn't found.
|
|---|
| 50 | * @param pv Pointer to the block to search.
|
|---|
| 51 | * @param ch The character to search for.
|
|---|
| 52 | * @param cb The size of the block.
|
|---|
| 53 | */
|
|---|
| 54 | #ifdef IPRT_NO_CRT
|
|---|
| 55 | # undef memchr
|
|---|
| 56 | void *RT_NOCRT(memchr)(const void *pv, int ch, size_t cb)
|
|---|
| 57 | #elif RT_MSC_PREREQ(RT_MSC_VER_VS2005)
|
|---|
| 58 | _CRTIMP __checkReturn _CONST_RETURN void * __cdecl
|
|---|
| 59 | memchr(__in_bcount_opt(_MaxCount) const void *pv, __in int ch, __in size_t cb)
|
|---|
| 60 | #else
|
|---|
| 61 | void *memchr(const void *pv, int ch, size_t cb)
|
|---|
| 62 | #endif
|
|---|
| 63 | {
|
|---|
| 64 | uint8_t const *pu8 = (uint8_t const *)pv;
|
|---|
| 65 | size_t cb2 = cb;
|
|---|
| 66 | while (cb2-- > 0)
|
|---|
| 67 | {
|
|---|
| 68 | if (*pu8 == ch)
|
|---|
| 69 | return (void *)pu8;
|
|---|
| 70 | pu8++;
|
|---|
| 71 | }
|
|---|
| 72 | return NULL;
|
|---|
| 73 | }
|
|---|
| 74 | RT_ALIAS_AND_EXPORT_NOCRT_SYMBOL(memchr);
|
|---|
| 75 |
|
|---|
