/*
* Copyright (C) 2019 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
* This library 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
* Library General Public License for more details.
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "HexNumber.h"
#include <wtf/PrintStream.h>
#include <wtf/text/StringView.h>
namespace WTF {
namespace Internal {
std::pair<LChar*, unsigned> appendHex(LChar* buffer, unsigned bufferSize, std::uintmax_t number, unsigned minimumDigits, HexConversionMode mode)
{
auto end = buffer + bufferSize;
auto start = end;
auto hexDigits = hexDigitsForMode(mode);
do {
*--start = hexDigits[number & 0xF];
number >>= 4;
} while (number);
auto startWithLeadingZeros = end - std::min(minimumDigits, bufferSize);
if (start > startWithLeadingZeros) {
std::memset(startWithLeadingZeros, '0', start - startWithLeadingZeros);
start = startWithLeadingZeros;
}
return { start, end - start };
void printInternal(PrintStream& out, HexNumberBuffer buffer)
out.print(StringView(buffer.characters(), buffer.length));
} // namespace WTF
