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// util/hex.h
/* Copyright 2009 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.
*/
#pragma once
#include <string>
#include "mongo/base/string_data.h"
#include "mongo/bson/util/builder.h"
namespace mongo {
//can't use hex namespace because it conflicts with hex iostream function
inline int fromHex( char c ) {
if ( '0' <= c && c <= '9' )
return c - '0';
if ( 'a' <= c && c <= 'f' )
return c - 'a' + 10;
if ( 'A' <= c && c <= 'F' )
return c - 'A' + 10;
verify( false );
return 0xff;
}
inline char fromHex( const char *c ) {
return (char)(( fromHex( c[ 0 ] ) << 4 ) | fromHex( c[ 1 ] ));
}
inline char fromHex( const StringData& c ) {
return (char)(( fromHex( c[ 0 ] ) << 4 ) | fromHex( c[ 1 ] ));
}
inline std::string toHex(const void* inRaw, int len) {
static const char hexchars[] = "0123456789ABCDEF";
StringBuilder out;
const char* in = reinterpret_cast<const char*>(inRaw);
for (int i=0; i<len; ++i) {
char c = in[i];
char hi = hexchars[(c & 0xF0) >> 4];
char lo = hexchars[(c & 0x0F)];
out << hi << lo;
}
return out.str();
}
template <typename T> std::string integerToHex(T val);
inline std::string toHexLower(const void* inRaw, int len) {
static const char hexchars[] = "0123456789abcdef";
StringBuilder out;
const char* in = reinterpret_cast<const char*>(inRaw);
for (int i=0; i<len; ++i) {
char c = in[i];
char hi = hexchars[(c & 0xF0) >> 4];
char lo = hexchars[(c & 0x0F)];
out << hi << lo;
}
return out.str();
}
}
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