ppsspp/Common/Swap.h
2013-07-28 21:04:17 -07:00

519 lines
12 KiB
C++

// Copyright (c) 2012- PPSSPP Project / Dolphin Project.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0 or later versions.
// 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 General Public License 2.0 for more details.
// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/
// Official git repository and contact information can be found at
// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
#pragma once
// Android
#if defined(ANDROID)
#include <sys/endian.h>
#if _BYTE_ORDER == _LITTLE_ENDIAN && !defined(COMMON_LITTLE_ENDIAN)
#define COMMON_LITTLE_ENDIAN 1
#elif _BYTE_ORDER == _BIG_ENDIAN && !defined(COMMON_BIG_ENDIAN)
#define COMMON_BIG_ENDIAN 1
#endif
// GCC 4.6+
#elif __GNUC__ >= 5 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)
#if __BYTE_ORDER__ && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) && !defined(COMMON_LITTLE_ENDIAN)
#define COMMON_LITTLE_ENDIAN 1
#elif __BYTE_ORDER__ && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) && !defined(COMMON_BIG_ENDIAN)
#define COMMON_BIG_ENDIAN 1
#endif
// LLVM/clang
#elif __clang__
#if __LITTLE_ENDIAN__ && !defined(COMMON_LITTLE_ENDIAN)
#define COMMON_LITTLE_ENDIAN 1
#elif __BIG_ENDIAN__ && !defined(COMMON_BIG_ENDIAN)
#define COMMON_BIG_ENDIAN 1
#endif
// MSVC
#elif defined(_MSC_VER) && !defined(COMMON_BIG_ENDIAN) && !defined(COMMON_LITTLE_ENDIAN)
#ifdef _XBOX
#define COMMON_BIG_ENDIAN 1
#else
#define COMMON_LITTLE_ENDIAN 1
#endif
#endif
// Worst case, default to little endian.
#if !COMMON_BIG_ENDIAN && !COMMON_LITTLE_ENDIAN
#define COMMON_LITTLE_ENDIAN 1
#endif
template <typename T, typename F>
struct swap_struct_t {
typedef swap_struct_t<T, F> swapped_t;
protected:
T value;
static T swap(T v) {
return F::swap(v);
}
public:
T const swap() const {
return swap(value);
}
swap_struct_t() : value((T)0) {}
swap_struct_t(const T &v): value(swap(v)) {}
template <typename S>
swapped_t& operator=(const S &source) {
value = swap((T)source);
return *this;
}
operator long() const { return (long)swap(); }
operator s16() const { return (s16)swap(); }
operator u16() const { return (u16)swap(); }
operator s32() const { return (s32)swap(); }
operator u32() const { return (u32)swap(); }
operator s64() const { return (s64)swap(); }
operator u64() const { return (u64)swap(); }
operator float() const { return (float)swap(); }
operator double() const { return (double)swap(); }
// +v
swapped_t operator +() const {
return +swap();
}
// -v
swapped_t operator -() const {
return -swap();
}
// v / 5
swapped_t operator/(const swapped_t &i) const {
return swap() / i.swap();
}
template <typename S>
swapped_t operator/(const S &i) const {
return swap() / i;
}
// v * 5
swapped_t operator*(const swapped_t &i) const {
return swap() * i.swap();
}
template <typename S>
swapped_t operator*(const S &i) const {
return swap() * i;
}
// v + 5
swapped_t operator+(const swapped_t &i) const {
return swap() + i.swap();
}
template <typename S>
swapped_t operator+(const S &i) const {
return swap() + (T)i;
}
// v - 5
swapped_t operator-(const swapped_t &i) const {
return swap() - i.swap();
}
template <typename S>
swapped_t operator-(const S &i) const {
return swap() - (T)i;
}
// v += 5
swapped_t& operator+=(const swapped_t &i) {
value = swap(swap() + i.swap());
return *this;
}
template <typename S>
swapped_t& operator+=(const S &i) {
value = swap(swap() + (T)i);
return *this;
}
// v -= 5
swapped_t& operator-=(const swapped_t &i) {
value = swap(swap() - i.swap());
return *this;
}
template <typename S>
swapped_t& operator-=(const S &i) {
value = swap(swap() - (T)i);
return *this;
}
// ++v
swapped_t& operator++() {
value = swap(swap()+1);
return *this;
}
// --v
swapped_t& operator--() {
value = swap(swap()-1);
return *this;
}
// v++
swapped_t operator++(int) {
swapped_t old = *this;
value = swap(swap()+1);
return old;
}
// v--
swapped_t operator--(int) {
swapped_t old = *this;
value = swap(swap()-1);
return old;
}
// Comparaison
// v == i
bool operator==(const swapped_t &i) const {
return swap() == i.swap();
}
template <typename S>
bool operator==(const S &i) const {
return swap() == i;
}
// v != i
bool operator!=(const swapped_t &i) const {
return swap() != i.swap();
}
template <typename S>
bool operator!=(const S &i) const {
return swap() != i;
}
// v > i
bool operator>(const swapped_t &i) const {
return swap() > i.swap();
}
template <typename S>
bool operator>(const S &i) const {
return swap() > i;
}
// v < i
bool operator<(const swapped_t &i) const {
return swap() < i.swap();
}
template <typename S>
bool operator<(const S &i) const {
return swap() < i;
}
// v >= i
bool operator>=(const swapped_t &i) const {
return swap() >= i.swap();
}
template <typename S>
bool operator>=(const S &i) const {
return swap() >= i;
}
// v <= i
bool operator<=(const swapped_t &i) const {
return swap() <= i.swap();
}
template <typename S>
bool operator<=(const S &i) const {
return swap() <= i;
}
// logical
swapped_t operator !() const {
return !swap();
}
// bitmath
swapped_t operator ~() const {
return ~swap();
}
swapped_t operator &(const swapped_t &b) const {
return swap() & b.swap();
}
template <typename S>
swapped_t operator &(const S &b) const {
return swap() & b;
}
swapped_t& operator &=(const swapped_t &b) {
value = swap(swap() & b.swap());
return *this;
}
template <typename S>
swapped_t& operator &=(const S b) {
value = swap(swap() & b);
return *this;
}
swapped_t operator |(const swapped_t &b) const {
return swap() | b.swap();
}
template <typename S>
swapped_t operator |(const S &b) const {
return swap() | b;
}
swapped_t& operator |=(const swapped_t &b) {
value = swap(swap() | b.swap());
return *this;
}
template <typename S>
swapped_t& operator |=(const S &b) {
value = swap(swap() | b);
return *this;
}
swapped_t operator ^(const swapped_t &b) const {
return swap() ^ b.swap();
}
template <typename S>
swapped_t operator ^(const S &b) const {
return swap() ^ b;
}
swapped_t& operator ^=(const swapped_t &b) {
value = swap(swap() ^ b.swap());
return *this;
}
template <typename S>
swapped_t& operator ^=(const S &b) {
value = swap(swap() ^ b);
return *this;
}
template <typename S>
swapped_t operator <<(const S &b) const {
return swap() << b;
}
template <typename S>
swapped_t& operator <<=(const S &b) const {
value = swap(swap() << b);
return *this;
}
template <typename S>
swapped_t operator >>(const S &b) const {
return swap() >> b;
}
template <typename S>
swapped_t& operator >>=(const S &b) const {
value = swap(swap() >> b);
return *this;
}
// Member
/** todo **/
// Arithmetics
template <typename S, typename T2, typename F2>
friend S operator+(const S &p, const swapped_t v);
template <typename S, typename T2, typename F2>
friend S operator-(const S &p, const swapped_t v);
template <typename S, typename T2, typename F2>
friend S operator/(const S &p, const swapped_t v);
template <typename S, typename T2, typename F2>
friend S operator*(const S &p, const swapped_t v);
template <typename S, typename T2, typename F2>
friend S operator%(const S &p, const swapped_t v);
// Arithmetics + assignements
template <typename S, typename T2, typename F2>
friend S operator+=(const S &p, const swapped_t v);
template <typename S, typename T2, typename F2>
friend S operator-=(const S &p, const swapped_t v);
// Bitmath
template <typename S, typename T2, typename F2>
friend S operator&(const S &p, const swapped_t v);
// Comparison
template <typename S, typename T2, typename F2>
friend bool operator<(const S &p, const swapped_t v);
template <typename S, typename T2, typename F2>
friend bool operator>(const S &p, const swapped_t v);
template <typename S, typename T2, typename F2>
friend bool operator<=(const S &p, const swapped_t v);
template <typename S, typename T2, typename F2>
friend bool operator>=(const S &p, const swapped_t v);
template <typename S, typename T2, typename F2>
friend bool operator!=(const S &p, const swapped_t v);
template <typename S, typename T2, typename F2>
friend bool operator==(const S &p, const swapped_t v);
};
// Arithmetics
template <typename S, typename T, typename F>
S operator+(const S &i, const swap_struct_t<T, F> v) {
return i + v.swap();
}
template <typename S, typename T, typename F>
S operator-(const S &i, const swap_struct_t<T, F> v) {
return i - v.swap();
}
template <typename S, typename T, typename F>
S operator/(const S &i, const swap_struct_t<T, F> v) {
return i / v.swap();
}
template <typename S, typename T, typename F>
S operator*(const S &i, const swap_struct_t<T, F> v) {
return i * v.swap();
}
template <typename S, typename T, typename F>
S operator%(const S &i, const swap_struct_t<T, F> v) {
return i % v.swap();
}
// Arithmetics + assignements
template <typename S, typename T, typename F>
S &operator+=(S &i, const swap_struct_t<T, F> v) {
i += v.swap();
return i;
}
template <typename S, typename T, typename F>
S &operator-=(S &i, const swap_struct_t<T, F> v) {
i -= v.swap();
return i;
}
// Logical
template <typename S, typename T, typename F>
S operator&(const S &i, const swap_struct_t<T, F> v) {
return i & v.swap();
}
template <typename S, typename T, typename F>
S operator&(const swap_struct_t<T, F> v, const S &i) {
return (S)(v.swap() & i);
}
// Comparaison
template <typename S, typename T, typename F>
bool operator<(const S &p, const swap_struct_t<T, F> v) {
return p < v.swap();
}
template <typename S, typename T, typename F>
bool operator>(const S &p, const swap_struct_t<T, F> v) {
return p > v.swap();
}
template <typename S, typename T, typename F>
bool operator<=(const S &p, const swap_struct_t<T, F> v) {
return p <= v.swap();
}
template <typename S, typename T, typename F>
bool operator>=(const S &p, const swap_struct_t<T, F> v) {
return p >= v.swap();
}
template <typename S, typename T, typename F>
bool operator!=(const S &p, const swap_struct_t<T, F> v) {
return p != v.swap();
}
template <typename S, typename T, typename F>
bool operator==(const S &p, const swap_struct_t<T, F> v) {
return p == v.swap();
}
template <typename T>
struct swap_64_t {
static T swap(T x) {
return (T)bswap64(*(u64 *)&x);
}
};
template <typename T>
struct swap_32_t {
static T swap(T x) {
return (T)bswap32(*(u32 *)&x);
}
};
template <typename T>
struct swap_16_t {
static T swap(T x) {
return (T)bswap16(*(u16 *)&x);
}
};
#if COMMON_LITTLE_ENDIAN
typedef u32 u32_le;
typedef u16 u16_le;
typedef u64 u64_le;
typedef s32 s32_le;
typedef s16 s16_le;
typedef s64 s64_le;
typedef float float_le;
typedef double double_le;
typedef swap_struct_t<u64, swap_64_t<u64>> u64_be;
typedef swap_struct_t<s64, swap_64_t<s64>> s64_be;
typedef swap_struct_t<u32, swap_32_t<u32>> u32_be;
typedef swap_struct_t<s32, swap_32_t<s32>> s32_be;
typedef swap_struct_t<u16, swap_16_t<u32>> u16_be;
typedef swap_struct_t<s16, swap_16_t<s32>> s16_be;
typedef swap_struct_t<float, swap_32_t<float> > float_be;
typedef swap_struct_t<double, swap_64_t<double> > double_be;
#else
typedef swap_struct_t<u64, swap_64_t<u64>> u64_le;
typedef swap_struct_t<s64, swap_64_t<s64>> s64_le;
typedef swap_struct_t<u32, swap_32_t<u32>> u32_le;
typedef swap_struct_t<s32, swap_32_t<s32>> s32_le;
typedef swap_struct_t<u16, swap_16_t<u32>> u16_le;
typedef swap_struct_t<s16, swap_16_t<s32>> s16_le;
typedef swap_struct_t<float, swap_32_t<float> > float_le;
typedef swap_struct_t<double, swap_64_t<double> > double_le;
typedef u32 u32_be;
typedef u16 u16_be;
typedef u64 u64_be;
typedef s32 s32_be;
typedef s16 s16_be;
typedef s64 s64_be;
typedef float float_be;
typedef double double_be;
#endif