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// util/hex.cpp
/* Copyright 2013 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects
* for all of the code used other than as permitted herein. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you do not
* wish to do so, delete this exception statement from your version. If you
* delete this exception statement from all source files in the program,
* then also delete it in the license file.
*/
#include <string>
#include "mongo/util/hex.h"
namespace mongo {
template<typename T>
std::string integerToHexDef(T inInt) {
if(!inInt)
return "0";
static const char hexchars[] = "0123456789ABCDEF";
static const size_t outbufSize = sizeof(T) * 2 + 1;
char outbuf[outbufSize];
outbuf[outbufSize - 1] = '\0';
char c;
int lastSeenNumber = 0;
for (int j = int(outbufSize) - 2; j >= 0; j--) {
c = hexchars[inInt & 0xF];
if(c != '0')
lastSeenNumber = j;
outbuf[j] = c;
inInt = inInt >> 4;
}
char *bufPtr = outbuf;
bufPtr += lastSeenNumber;
return std::string(bufPtr);
}
template<> std::string integerToHex<int>(int val) { return integerToHexDef(val); }
template<> std::string integerToHex<unsigned int>(unsigned int val) {
return integerToHexDef(val); }
template<> std::string integerToHex<long>(long val) { return integerToHexDef(val); }
template<> std::string integerToHex<unsigned long>(unsigned long val) { return integerToHexDef(val); }
template<> std::string integerToHex<long long>(long long val) { return integerToHexDef(val); }
template<> std::string integerToHex<unsigned long long>(unsigned long long val) { return integerToHexDef(val); }
}
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