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//
// VMime library (http://www.vmime.org)
// Copyright (C) 2002 Vincent Richard <vincent@vmime.org>
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
// published by the Free Software Foundation; either version 3 of
// the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// Linking this library statically or dynamically with other modules is making
// a combined work based on this library. Thus, the terms and conditions of
// the GNU General Public License cover the whole combination.
//
#include "vmime/utility/urlUtils.hpp"
#include "vmime/parserHelpers.hpp"
namespace vmime {
namespace utility {
const string urlUtils::encode(const string& s) {
static const string RESERVED_CHARS =
/* reserved */ "$&+,/:;=?@"
/* unsafe */ "<>#%{}[]|\\^\"~`";
string result;
result.reserve(s.length());
for (string::const_iterator it = s.begin() ; it != s.end() ; ++it) {
const char c = *it;
if (parserHelpers::isPrint(c) && !parserHelpers::isSpace(c) &&
static_cast <unsigned char>(c) <= 127 &&
RESERVED_CHARS.find(c) == string::npos) {
result += c;
} else {
char hex[4];
const unsigned char k = static_cast <unsigned char>(c);
hex[0] = '%';
hex[1] = "0123456789ABCDEF"[k / 16];
hex[2] = "0123456789ABCDEF"[k % 16];
hex[3] = 0;
result += hex;
}
}
return result;
}
const string urlUtils::decode(const string& s) {
string result;
result.reserve(s.length());
for (string::const_iterator it = s.begin() ; it != s.end() ; ) {
const char c = *it;
switch (c) {
case '%': {
++it; // skip '%'
const char_t p = (it != s.end() ? *(it++) : 0);
const char_t q = (it != s.end() ? *(it++) : 0);
unsigned int r = 0;
switch (p) {
case 0: r = '%'; break;
case 'a': case 'A': r = 10; break;
case 'b': case 'B': r = 11; break;
case 'c': case 'C': r = 12; break;
case 'd': case 'D': r = 13; break;
case 'e': case 'E': r = 14; break;
case 'f': case 'F': r = 15; break;
default: r = p - '0'; break;
}
if (q != 0) {
r *= 16;
switch (q) {
case 'a': case 'A': r += 10; break;
case 'b': case 'B': r += 11; break;
case 'c': case 'C': r += 12; break;
case 'd': case 'D': r += 13; break;
case 'e': case 'E': r += 14; break;
case 'f': case 'F': r += 15; break;
default: r += q - '0'; break;
}
}
result += static_cast <char>(r);
break;
}
default:
result += c;
++it;
break;
}
}
return result;
}
} // utility
} // vmime
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