libc.c
上传用户:lyxiangda
上传日期:2007-01-12
资源大小:3042k
文件大小:4k
- /*
- * The contents of this file are subject to the Mozilla Public
- * License Version 1.1 (the "License"); you may not use this file
- * except in compliance with the License. You may obtain a copy of
- * the License at http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS
- * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- * implied. See the License for the specific language governing
- * rights and limitations under the License.
- *
- * The Original Code is the Netscape security libraries.
- *
- * The Initial Developer of the Original Code is Netscape
- * Communications Corporation. Portions created by Netscape are
- * Copyright (C) 1994-2000 Netscape Communications Corporation. All
- * Rights Reserved.
- *
- * Contributor(s):
- *
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL"), in which case the provisions of the GPL are applicable
- * instead of those above. If you wish to allow use of your
- * version of this file only under the terms of the GPL and not to
- * allow others to use your version of this file under the MPL,
- * indicate your decision by deleting the provisions above and
- * replace them with the notice and other provisions required by
- * the GPL. If you do not delete the provisions above, a recipient
- * may use your version of this file under either the MPL or the
- * GPL.
- */
- #ifdef DEBUG
- static const char CVS_ID[] = "@(#) $RCSfile: libc.c,v $ $Revision: 1.1 $ $Date: 2000/03/31 19:50:16 $ $Name: NSS_3_1_1_RTM $";
- #endif /* DEBUG */
- /*
- * libc.c
- *
- * This file contains our wrappers/reimplementations for "standard"
- * libc functions. Things like "memcpy." We add to this as we need
- * it. Oh, and let's keep it in alphabetical order, should it ever
- * get large. Most string/character stuff should be in utf8.c, not
- * here. This file (and maybe utf8.c) should be the only ones in
- * NSS to include files with angle brackets.
- */
- #ifndef BASE_H
- #include "base.h"
- #endif /* BASE_H */
- #include <string.h> /* memcpy, memset */
- /*
- * nsslibc_memcpy
- * nsslibc_memset
- * nsslibc_offsetof
- * nsslibc_memequal
- */
- /*
- * nsslibc_memcpy
- *
- * Errors:
- * NSS_ERROR_INVALID_POINTER
- *
- * Return value:
- * NULL on error
- * The destination pointer on success
- */
- NSS_IMPLEMENT void *
- nsslibc_memcpy
- (
- void *dest,
- const void *source,
- PRUint32 n
- )
- {
- #ifdef NSSDEBUG
- if( ((void *)NULL == dest) || ((const void *)NULL == source) ) {
- nss_SetError(NSS_ERROR_INVALID_POINTER);
- return (void *)NULL;
- }
- #endif /* NSSDEBUG */
- return memcpy(dest, source, (size_t)n);
- }
- /*
- * nsslibc_memset
- *
- * Errors:
- * NSS_ERROR_INVALID_POINTER
- *
- * Return value:
- * NULL on error
- * The destination pointer on success
- */
- NSS_IMPLEMENT void *
- nsslibc_memset
- (
- void *dest,
- PRUint8 byte,
- PRUint32 n
- )
- {
- #ifdef NSSDEBUG
- if( ((void *)NULL == dest) ) {
- nss_SetError(NSS_ERROR_INVALID_POINTER);
- return (void *)NULL;
- }
- #endif /* NSSDEBUG */
- return memset(dest, (int)byte, (size_t)n);
- }
- /*
- * nsslibc_memequal
- *
- * Errors:
- * NSS_ERROR_INVALID_POINTER
- *
- * Return value:
- * PR_TRUE if they match
- * PR_FALSE if they don't
- * PR_FALSE upon error
- */
- NSS_IMPLEMENT PRBool
- nsslibc_memequal
- (
- const void *a,
- const void *b,
- PRUint32 len,
- PRStatus *statusOpt
- )
- {
- #ifdef NSSDEBUG
- if( (((void *)NULL == a) || ((void *)NULL == b)) ) {
- nss_SetError(NSS_ERROR_INVALID_POINTER);
- if( (PRStatus *)NULL != statusOpt ) {
- *statusOpt = PR_FAILURE;
- }
- return PR_FALSE;
- }
- #endif /* NSSDEBUG */
- if( (PRStatus *)NULL != statusOpt ) {
- *statusOpt = PR_SUCCESS;
- }
- if( 0 == memcmp(a, b, len) ) {
- return PR_TRUE;
- } else {
- return PR_FALSE;
- }
- }
- /*
- * nsslibc_memcmp
- */
- NSS_IMPLEMENT PRInt32
- nsslibc_memcmp
- (
- const void *a,
- const void *b,
- PRUint32 len,
- PRStatus *statusOpt
- )
- {
- int v;
- #ifdef NSSDEBUG
- if( (((void *)NULL == a) || ((void *)NULL == b)) ) {
- nss_SetError(NSS_ERROR_INVALID_POINTER);
- if( (PRStatus *)NULL != statusOpt ) {
- *statusOpt = PR_FAILURE;
- }
- return -2;
- }
- #endif /* NSSDEBUG */
- if( (PRStatus *)NULL != statusOpt ) {
- *statusOpt = PR_SUCCESS;
- }
- v = memcmp(a, b, len);
- return (PRInt32)v;
- }
- /*
- * offsetof is a preprocessor definition
- */