gecko/security/nss/lib/base/libc.c
2008-06-06 08:40:11 -04:00

201 lines
4.5 KiB
C

/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* 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 the Initial Developer are Copyright (C) 1994-2000
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifdef DEBUG
static const char CVS_ID[] = "@(#) $RCSfile: libc.c,v $ $Revision: 1.3 $ $Date: 2005/01/20 02:25:45 $";
#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
*/