Fawkes API
Fawkes Development Version
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00001 /*************************************************************************** 00002 * string_urlescape.h - Fawkes string URL escape utils 00003 * 00004 * Created: Fri Oct 24 09:31:39 2008 00005 * Copyright 2006-2007 Tim Niemueller [www.niemueller.de] 00006 * 00007 ****************************************************************************/ 00008 00009 /* This program is free software; you can redistribute it and/or modify 00010 * it under the terms of the GNU General Public License as published by 00011 * the Free Software Foundation; either version 2 of the License, or 00012 * (at your option) any later version. A runtime exception applies to 00013 * this software (see LICENSE.GPL_WRE file mentioned below for details). 00014 * 00015 * This program is distributed in the hope that it will be useful, 00016 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00017 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00018 * GNU Library General Public License for more details. 00019 * 00020 * Read the full text in the LICENSE.GPL_WRE file in the doc directory. 00021 */ 00022 00023 #ifndef __UTILS_MISC_STRING_URLESCAPE_H_ 00024 #define __UTILS_MISC_STRING_URLESCAPE_H_ 00025 00026 namespace fawkes { 00027 00028 00029 /** Transform hex to value. 00030 * @param c character 00031 * @return value of hex code as number 00032 */ 00033 int 00034 unhex(char c) 00035 { 00036 return( c >= '0' && c <= '9' ? c - '0' 00037 : c >= 'A' && c <= 'F' ? c - 'A' + 10 00038 : c - 'a' + 10 ); 00039 } 00040 00041 /** Remove URL hex escapes from s in place. 00042 * @param s string to manipulate 00043 */ 00044 void 00045 hex_unescape( char *s ) 00046 { 00047 char *p; 00048 00049 for ( p = s; *s != '\0'; ++s ) { 00050 if ( *s == '%' ) { 00051 if ( *++s != '\0' ) { 00052 *p = unhex( *s ) << 4; 00053 } 00054 if ( *++s != '\0' ) { 00055 *p++ += unhex( *s ); 00056 } 00057 } else { 00058 *p++ = *s; 00059 } 00060 } 00061 00062 *p = '\0'; 00063 } 00064 00065 00066 } // end namespace fawkes 00067 00068 #endif