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