#ifndef HexNumber_h
#define HexNumber_h
#include <wtf/text/StringConcatenate.h>
namespace WTF {
enum HexConversionMode {
Lowercase,
Uppercase
};
namespace Internal {
static const char* hexDigitsForMode(HexConversionMode mode)
{
static const char lowerHexDigits[17] = "0123456789abcdef";
static const char upperHexDigits[17] = "0123456789ABCDEF";
return mode == Lowercase ? lowerHexDigits : upperHexDigits;
}
};
template<typename T>
inline void appendByteAsHex(unsigned char byte, T& destination, HexConversionMode mode = Uppercase)
{
const char* hexDigits = Internal::hexDigitsForMode(mode);
destination.append(hexDigits[byte >> 4]);
destination.append(hexDigits[byte & 0xF]);
}
template<typename T>
inline void placeByteAsHexCompressIfPossible(unsigned char byte, T& destination, unsigned& index, HexConversionMode mode = Uppercase)
{
const char* hexDigits = Internal::hexDigitsForMode(mode);
if (byte >= 0x10)
destination[index++] = hexDigits[byte >> 4];
destination[index++] = hexDigits[byte & 0xF];
}
template<typename T>
inline void placeByteAsHex(unsigned char byte, T& destination, HexConversionMode mode = Uppercase)
{
const char* hexDigits = Internal::hexDigitsForMode(mode);
*destination++ = hexDigits[byte >> 4];
*destination++ = hexDigits[byte & 0xF];
}
template<typename T>
inline void appendUnsignedAsHex(unsigned number, T& destination, HexConversionMode mode = Uppercase)
{
const char* hexDigits = Internal::hexDigitsForMode(mode);
Vector<UChar, 8> result;
do {
result.prepend(hexDigits[number % 16]);
number >>= 4;
} while (number > 0);
destination.append(result.data(), result.size());
}
template<typename T>
inline void appendUnsignedAsHexFixedSize(unsigned number, T& destination, unsigned desiredDigits, HexConversionMode mode = Uppercase)
{
ASSERT(desiredDigits);
const char* hexDigits = Internal::hexDigitsForMode(mode);
Vector<UChar, 8> result;
do {
result.prepend(hexDigits[number % 16]);
number >>= 4;
} while (result.size() < desiredDigits);
ASSERT(result.size() == desiredDigits);
destination.append(result.data(), result.size());
}
}
using WTF::appendByteAsHex;
using WTF::appendUnsignedAsHex;
using WTF::appendUnsignedAsHexFixedSize;
using WTF::placeByteAsHex;
using WTF::placeByteAsHexCompressIfPossible;
using WTF::Lowercase;
#endif // HexNumber_h