#ifndef FlipBytes_h
#define FlipBytes_h
namespace WTF {
inline bool needToFlipBytesIfLittleEndian(bool littleEndian)
{
#if CPU(BIG_ENDIAN)
return littleEndian;
#else
return !littleEndian;
#endif
}
inline uint16_t flipBytes(uint16_t value)
{
return ((value & 0x00ff) << 8)
| ((value & 0xff00) >> 8);
}
inline uint32_t flipBytes(uint32_t value)
{
return ((value & 0x000000ff) << 24)
| ((value & 0x0000ff00) << 8)
| ((value & 0x00ff0000) >> 8)
| ((value & 0xff000000) >> 24);
}
inline uint64_t flipBytes(uint64_t value)
{
return ((value & 0x00000000000000ffull) << 56)
| ((value & 0x000000000000ff00ull) << 40)
| ((value & 0x0000000000ff0000ull) << 24)
| ((value & 0x00000000ff000000ull) << 8)
| ((value & 0x000000ff00000000ull) >> 8)
| ((value & 0x0000ff0000000000ull) >> 24)
| ((value & 0x00ff000000000000ull) >> 40)
| ((value & 0xff00000000000000ull) >> 56);
}
template<typename T>
inline T flipBytes(T value)
{
if (sizeof(value) == 1)
return value;
if (sizeof(value) == 2) {
union {
T original;
uint16_t word;
} u;
u.original = value;
u.word = flipBytes(u.word);
return u.original;
}
if (sizeof(value) == 4) {
union {
T original;
uint32_t word;
} u;
u.original = value;
u.word = flipBytes(u.word);
return u.original;
}
if (sizeof(value) == 8) {
union {
T original;
uint64_t word;
} u;
u.original = value;
u.word = flipBytes(u.word);
return u.original;
}
RELEASE_ASSERT_NOT_REACHED();
return T();
}
template<typename T>
inline T flipBytesIfLittleEndian(T value, bool littleEndian)
{
if (needToFlipBytesIfLittleEndian(littleEndian))
return flipBytes(value);
return value;
}
}
using WTF::needToFlipBytesIfLittleEndian;
using WTF::flipBytes;
using WTF::flipBytesIfLittleEndian;
#endif // FlipBytes_h