1 /*
2 * The contents of this file are subject to the Netscape Public
3 * License Version 1.1 (the "License"); you may not use this file
4 * except in compliance with the License. You may obtain a copy of
5 * the License at http://www.mozilla.org/NPL/
6 *
7 * Software distributed under the License is distributed on an "AS
8 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
9 * implied. See the License for the specific language governing
10 * rights and limitations under the License.
11 *
12 * The Original Code is Mozilla Communicator client code, released
13 * March 31, 1998.
14 *
15 * The Initial Developer of the Original Code is Netscape
16 * Communications Corporation. Portions created by Netscape are
17 * Copyright (C) 1998-1999 Netscape Communications Corporation. All
18 * Rights Reserved.
19 *
20 * Contributor(s):
21 */
22
23 /*
24 * LIBLDAP unescape.c -- LDAP URL un-escape routines
25 * We also tolerate URLs that look like: <ldapurl> and <URL:ldapurl>
26 */
27
28 #include "ldap-int.h"
29
30
31 static int unhex( char c );
32
33
34 void
nsldapi_hex_unescape(char * s)35 nsldapi_hex_unescape( char *s )
36 {
37 /*
38 * Remove URL hex escapes from s... done in place. The basic concept for
39 * this routine is borrowed from the WWW library HTUnEscape() routine.
40 */
41 char *p;
42
43 for ( p = s; *s != '\0'; ++s ) {
44 if ( *s == '%' ) {
45 if ( *++s == '\0' ) {
46 break;
47 }
48 *p = unhex( *s ) << 4;
49 if ( *++s == '\0' ) {
50 break;
51 }
52 *p++ += unhex( *s );
53
54 } else {
55 *p++ = *s;
56 }
57 }
58
59 *p = '\0';
60 }
61
62
63 static int
unhex(char c)64 unhex( char c )
65 {
66 return( c >= '0' && c <= '9' ? c - '0'
67 : c >= 'A' && c <= 'F' ? c - 'A' + 10
68 : c - 'a' + 10 );
69 }
70