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lightning-sunbird  0.9+nobinonly
unescape.c
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00001 /* ***** BEGIN LICENSE BLOCK *****
00002  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00003  *
00004  * The contents of this file are subject to the Mozilla Public License Version
00005  * 1.1 (the "License"); you may not use this file except in compliance with
00006  * the License. You may obtain a copy of the License at
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00009  * Software distributed under the License is distributed on an "AS IS" basis,
00010  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00011  * for the specific language governing rights and limitations under the
00012  * License.
00013  *
00014  * The Original Code is Mozilla Communicator client code, released
00015  * March 31, 1998.
00016  *
00017  * The Initial Developer of the Original Code is
00018  * Netscape Communications Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 1998-1999
00020  * the Initial Developer. All Rights Reserved.
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00024  * Alternatively, the contents of this file may be used under the terms of
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00037 
00038 /*
00039  *  LIBLDAP unescape.c -- LDAP URL un-escape routines
00040  *  We also tolerate URLs that look like: <ldapurl> and <URL:ldapurl>
00041  */
00042 
00043 #include "ldap-int.h"
00044 
00045 
00046 static int unhex( char c );
00047 
00048 
00049 void
00050 nsldapi_hex_unescape( char *s )
00051 {
00052 /*
00053  * Remove URL hex escapes from s... done in place.  The basic concept for
00054  * this routine is borrowed from the WWW library HTUnEscape() routine.
00055  */
00056        char   *p;
00057 
00058        for ( p = s; *s != '\0'; ++s ) {
00059               if ( *s == '%' ) {
00060                      if ( *++s != '\0' ) {
00061                             *p = unhex( *s ) << 4;
00062                      }
00063                      if ( *++s != '\0' ) {
00064                             *p++ += unhex( *s );
00065                      }
00066               } else {
00067                      *p++ = *s;
00068               }
00069        }
00070 
00071        *p = '\0';
00072 }
00073 
00074 
00075 static int
00076 unhex( char c )
00077 {
00078        return( c >= '0' && c <= '9' ? c - '0'
00079            : c >= 'A' && c <= 'F' ? c - 'A' + 10
00080            : c - 'a' + 10 );
00081 }