зеркало из https://github.com/mozilla/gecko-dev.git
144 строки
2.9 KiB
C
144 строки
2.9 KiB
C
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* libc.c
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*
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* This file contains our wrappers/reimplementations for "standard"
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* libc functions. Things like "memcpy." We add to this as we need
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* it. Oh, and let's keep it in alphabetical order, should it ever
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* get large. Most string/character stuff should be in utf8.c, not
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* here. This file (and maybe utf8.c) should be the only ones in
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* NSS to include files with angle brackets.
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*/
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#ifndef BASE_H
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#include "base.h"
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#endif /* BASE_H */
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#include <string.h> /* memcpy, memset */
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/*
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* nsslibc_memcpy
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* nsslibc_memset
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* nsslibc_offsetof
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* nsslibc_memequal
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*/
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/*
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* nsslibc_memcpy
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*
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* Errors:
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* NSS_ERROR_INVALID_POINTER
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*
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* Return value:
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* NULL on error
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* The destination pointer on success
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*/
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NSS_IMPLEMENT void *
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nsslibc_memcpy(void *dest, const void *source, PRUint32 n)
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{
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#ifdef NSSDEBUG
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if (((void *)NULL == dest) || ((const void *)NULL == source)) {
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nss_SetError(NSS_ERROR_INVALID_POINTER);
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return (void *)NULL;
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}
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#endif /* NSSDEBUG */
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return memcpy(dest, source, (size_t)n);
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}
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/*
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* nsslibc_memset
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*
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* Errors:
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* NSS_ERROR_INVALID_POINTER
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*
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* Return value:
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* NULL on error
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* The destination pointer on success
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*/
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NSS_IMPLEMENT void *
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nsslibc_memset(void *dest, PRUint8 byte, PRUint32 n)
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{
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#ifdef NSSDEBUG
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if (((void *)NULL == dest)) {
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nss_SetError(NSS_ERROR_INVALID_POINTER);
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return (void *)NULL;
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}
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#endif /* NSSDEBUG */
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return memset(dest, (int)byte, (size_t)n);
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}
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/*
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* nsslibc_memequal
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*
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* Errors:
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* NSS_ERROR_INVALID_POINTER
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*
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* Return value:
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* PR_TRUE if they match
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* PR_FALSE if they don't
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* PR_FALSE upon error
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*/
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NSS_IMPLEMENT PRBool
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nsslibc_memequal(const void *a, const void *b, PRUint32 len,
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PRStatus *statusOpt)
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{
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#ifdef NSSDEBUG
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if ((((void *)NULL == a) || ((void *)NULL == b))) {
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nss_SetError(NSS_ERROR_INVALID_POINTER);
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if ((PRStatus *)NULL != statusOpt) {
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*statusOpt = PR_FAILURE;
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}
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return PR_FALSE;
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}
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#endif /* NSSDEBUG */
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if ((PRStatus *)NULL != statusOpt) {
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*statusOpt = PR_SUCCESS;
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}
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if (0 == memcmp(a, b, len)) {
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return PR_TRUE;
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} else {
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return PR_FALSE;
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}
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}
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/*
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* nsslibc_memcmp
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*/
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NSS_IMPLEMENT PRInt32
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nsslibc_memcmp(const void *a, const void *b, PRUint32 len, PRStatus *statusOpt)
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{
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int v;
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#ifdef NSSDEBUG
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if ((((void *)NULL == a) || ((void *)NULL == b))) {
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nss_SetError(NSS_ERROR_INVALID_POINTER);
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if ((PRStatus *)NULL != statusOpt) {
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*statusOpt = PR_FAILURE;
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}
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return -2;
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}
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#endif /* NSSDEBUG */
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if ((PRStatus *)NULL != statusOpt) {
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*statusOpt = PR_SUCCESS;
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}
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v = memcmp(a, b, len);
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return (PRInt32)v;
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}
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/*
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* offsetof is a preprocessor definition
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*/
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