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/*
* Copyright (C) 2011 Research In Motion Limited. 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.
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_HEX_NUMBER_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_HEX_NUMBER_H_
#include "third_party/blink/renderer/platform/wtf/text/string_concatenate.h"
namespace WTF {
namespace Internal {
const LChar kLowerHexDigits[17] = "0123456789abcdef";
const LChar kUpperHexDigits[17] = "0123456789ABCDEF";
} // namespace Internal
class HexNumber final {
STATIC_ONLY(HexNumber);
public:
enum HexConversionMode { kLowercase, kUppercase };
template <typename T>
static inline void AppendByteAsHex(unsigned char byte,
T& destination,
HexConversionMode mode = kUppercase) {
const LChar* hex_digits = HexDigitsForMode(mode);
destination.Append(hex_digits[byte >> 4]);
destination.Append(hex_digits[byte & 0xF]);
}
static inline void AppendByteAsHex(unsigned char byte,
Vector<LChar>& destination,
HexConversionMode mode = kUppercase) {
const LChar* hex_digits = HexDigitsForMode(mode);
destination.push_back(hex_digits[byte >> 4]);
destination.push_back(hex_digits[byte & 0xF]);
}
static inline void AppendByteAsHex(unsigned char byte,
Vector<char>& destination,
HexConversionMode mode = kUppercase) {
const LChar* hex_digits = HexDigitsForMode(mode);
destination.push_back(hex_digits[byte >> 4]);
destination.push_back(hex_digits[byte & 0xF]);
}
template <typename T>
static inline void AppendUnsignedAsHex(unsigned number,
T& destination,
HexConversionMode mode = kUppercase) {
const LChar* hex_digits = HexDigitsForMode(mode);
Vector<LChar, 8> result;
do {
result.push_front(hex_digits[number % 16]);
number >>= 4;
} while (number > 0);
destination.Append(result.data(), result.size());
}
// Same as appendUnsignedAsHex, but using exactly 'desiredDigits' for the
// conversion.
template <typename T>
static inline void AppendUnsignedAsHexFixedSize(
unsigned number,
T& destination,
unsigned desired_digits,
HexConversionMode mode = kUppercase) {
DCHECK(desired_digits);
const LChar* hex_digits = HexDigitsForMode(mode);
Vector<LChar, 8> result;
do {
result.push_front(hex_digits[number % 16]);
number >>= 4;
} while (result.size() < desired_digits);
DCHECK_EQ(result.size(), desired_digits);
destination.Append(result.data(), result.size());
}
private:
static inline const LChar* HexDigitsForMode(HexConversionMode mode) {
return mode == kLowercase ? Internal::kLowerHexDigits
: Internal::kUpperHexDigits;
}
};
} // namespace WTF
using WTF::HexNumber;
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_HEX_NUMBER_H_
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