secitem.c
上传用户:lyxiangda
上传日期:2007-01-12
资源大小:3042k
文件大小:5k
- /*
- * 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.
- */
- /*
- * Support routines for SECItem data structure.
- *
- * $Id: secitem.c,v 1.2 2000/04/06 22:38:27 repka%netscape.com Exp $
- */
- #include "seccomon.h"
- #include "secitem.h"
- #include "base64.h"
- #include "secerr.h"
- SECItem *
- SECITEM_AllocItem(PRArenaPool *arena, SECItem *item, unsigned int len)
- {
- SECItem *result = NULL;
- void *mark;
- if (arena != NULL) {
- mark = PORT_ArenaMark(arena);
- }
- if (item == NULL) {
- if (arena != NULL) {
- result = PORT_ArenaZAlloc(arena, sizeof(SECItem));
- } else {
- result = PORT_ZAlloc(sizeof(SECItem));
- }
- if (result == NULL) {
- goto loser;
- }
- } else {
- PORT_Assert(item->data == NULL);
- result = item;
- }
- result->len = len;
- if (len) {
- if (arena != NULL) {
- result->data = PORT_ArenaAlloc(arena, len);
- } else {
- result->data = PORT_Alloc(len);
- }
- }
- if (arena != NULL) {
- PORT_ArenaUnmark(arena, mark);
- }
- return(result);
- loser:
- if (arena != NULL) {
- PORT_ArenaRelease(arena, mark);
- if (item != NULL) {
- item->data = NULL;
- item->len = 0;
- }
- } else {
- if (result != NULL) {
- SECITEM_FreeItem(result, (item == NULL) ? PR_TRUE : PR_FALSE);
- }
- }
- return(NULL);
- }
- SECStatus
- SECITEM_ReallocItem(PRArenaPool *arena, SECItem *item, unsigned int oldlen,
- unsigned int newlen)
- {
- PORT_Assert(item != NULL);
- if (item == NULL) {
- /* XXX Set error. But to what? */
- return SECFailure;
- }
- /*
- * If no old length, degenerate to just plain alloc.
- */
- if (oldlen == 0) {
- PORT_Assert(item->data == NULL || item->len == 0);
- if (newlen == 0) {
- /* Nothing to do. Weird, but not a failure. */
- return SECSuccess;
- }
- item->len = newlen;
- if (arena != NULL) {
- item->data = PORT_ArenaAlloc(arena, newlen);
- } else {
- item->data = PORT_Alloc(newlen);
- }
- } else {
- if (arena != NULL) {
- item->data = PORT_ArenaGrow(arena, item->data, oldlen, newlen);
- } else {
- item->data = PORT_Realloc(item->data, newlen);
- }
- }
- if (item->data == NULL) {
- return SECFailure;
- }
- return SECSuccess;
- }
- SECComparison
- SECITEM_CompareItem(const SECItem *a, const SECItem *b)
- {
- unsigned m;
- SECComparison rv;
- m = ( ( a->len < b->len ) ? a->len : b->len );
-
- rv = (SECComparison) PORT_Memcmp(a->data, b->data, m);
- if (rv) {
- return rv;
- }
- if (a->len < b->len) {
- return SECLessThan;
- }
- if (a->len == b->len) {
- return SECEqual;
- }
- return SECGreaterThan;
- }
- PRBool
- SECITEM_ItemsAreEqual(const SECItem *a, const SECItem *b)
- {
- if (SECITEM_CompareItem(a, b) == SECEqual)
- return PR_TRUE;
- return PR_FALSE;
- }
- SECItem *
- SECITEM_DupItem(const SECItem *from)
- {
- SECItem *to;
-
- if ( from == NULL ) {
- return(NULL);
- }
-
- to = (SECItem *)PORT_Alloc(sizeof(SECItem));
- if ( to == NULL ) {
- return(NULL);
- }
- to->data = (unsigned char *)PORT_Alloc(from->len);
- if ( to->data == NULL ) {
- PORT_Free(to);
- return(NULL);
- }
- to->len = from->len;
- PORT_Memcpy(to->data, from->data, to->len);
-
- return(to);
- }
- SECStatus
- SECITEM_CopyItem(PRArenaPool *arena, SECItem *to, const SECItem *from)
- {
- if (from->data && from->len) {
- if ( arena ) {
- to->data = (unsigned char*) PORT_ArenaAlloc(arena, from->len);
- } else {
- to->data = (unsigned char*) PORT_Alloc(from->len);
- }
-
- if (!to->data) {
- return SECFailure;
- }
- PORT_Memcpy(to->data, from->data, from->len);
- to->len = from->len;
- } else {
- to->data = 0;
- to->len = 0;
- }
- return SECSuccess;
- }
- void
- SECITEM_FreeItem(SECItem *zap, PRBool freeit)
- {
- if (zap) {
- PORT_Free(zap->data);
- zap->data = 0;
- zap->len = 0;
- if (freeit) {
- PORT_Free(zap);
- }
- }
- }
- void
- SECITEM_ZfreeItem(SECItem *zap, PRBool freeit)
- {
- if (zap) {
- PORT_ZFree(zap->data, zap->len);
- zap->data = 0;
- zap->len = 0;
- if (freeit) {
- PORT_ZFree(zap, sizeof(SECItem));
- }
- }
- }