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/*
* Copyright (c) 2010 Remko Tronçon
* Licensed under the GNU General Public License v3.
* See Documentation/Licenses/GPLv3.txt for more information.
*/
#include <Swiften/StringCodecs/Hexify.h>
#include <sstream>
#include <iomanip>
#include <boost/numeric/conversion/cast.hpp>
#include <string>
#include <Swiften/Base/ByteArray.h>
namespace Swift {
std::string Hexify::hexify(unsigned char byte) {
std::ostringstream result;
result << std::hex << std::setw(2) << std::setfill('0') << boost::numeric_cast<unsigned int>(byte);
return std::string(result.str());
}
std::string Hexify::hexify(const ByteArray& data) {
std::ostringstream result;
result << std::hex;
for (unsigned int i = 0; i < data.size(); ++i) {
result << std::setw(2) << std::setfill('0') << boost::numeric_cast<unsigned int>(static_cast<unsigned char>(data[i]));
}
return std::string(result.str());
}
ByteArray Hexify::unhexify(const std::string& hexstring) {
if (hexstring.size() % 2) {
return ByteArray();
}
ByteArray result = ByteArray(hexstring.size() / 2);
for (size_t pos = 0; pos < hexstring.size() - 1; pos += 2) {
char c;
c = hexstring[pos];
int a = (c>='0'&&c<='9') ? c-'0' : (c>='A'&&c<='Z') ? c-'A' + 10 : (c>='a'&&c<='z') ? c-'a' + 10 : -1;
c = hexstring[pos+1];
int b = (c>='0'&&c<='9') ? c-'0' : (c>='A'&&c<='Z') ? c-'A' + 10 : (c>='a'&&c<='z') ? c-'a' + 10 : -1;
if (a == -1 || b == -1) return ByteArray(); // fail
result[pos/2] = (a<<4) | b;
}
return result;
}
}
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Swift