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Clean up bitops.hpp

master
Emil-Jarosz 2 years ago
parent
commit
078e9bdab4
1 changed files with 42 additions and 66 deletions
  1. +42
    -66
      include/gp/math/boolean/bitops.hpp

+ 42
- 66
include/gp/math/boolean/bitops.hpp View File

@ -2,79 +2,55 @@
#include "gp/containers/array.hpp"
#include <bit>
#include <stddef.h>
#include <stdint.h>
namespace gp{
namespace _impl{
constexpr uint32_t uint32_ = 0x01020304;
constexpr uint8_t magic_ = (const uint8_t&)uint32_;
}
namespace gp {
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wfour-char-constants"
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmultichar"
enum class endian : uint16_t
{
#ifdef _WIN32
little = 0,
big = 1,
native = little
#elseif defined(__BYTE_ORDER__)
little = __ORDER_LITTLE_ENDIAN__,
big = __ORDER_BIG_ENDIAN__,
native = __BYTE_ORDER__
#else
little = true,
big = false,
native = ('ABCD'==0x41424344UL)
};
#endif
#pragma GCC diagnostic pop
#pragma clang diagnostic pop
using endian = std::endian;
template <typename T>
T swap_endian(T value)
{
k">union
p">{
T v;
uint8_t u8[sizeof(T)];
} src, dest;
template <typename T>
T swap_endian(T value) {
union {
T v;
uint8_t u8[sizeof(T)];
} src, dest;
src.v = value;
src.v = value;
for (size_t idx = 0;idx<sizeof(T);idx++)
{
dest.u8[idx] = src.u8[sizeof(T)-idx-1];
}
return dest.v;
for (size_t idx = 0;idx<sizeof(T);idx++) {
dest.u8[idx] = src.u8[sizeof(T)-idx-1];
}
return dest.v;
}
template<typename T, endian mode = endian::big>
struct endian_wrapper {
union{
T value;
gp::array<uint8_t, sizeof(T)> bytes;
};
endian_wrapper(){};
endian_wrapper(T v) : value{
mode == endian::native ? v : swap_endian(v)
}{}
endian_wrapper(endian_wrapper& v) : value{
v.value
}{}
endian_wrapper& operator=(T p) {
value = mode == endian::native ? p : swap_endian(p);
return *this;
}
template<typename T, endian mode = endian::big>
struct endian_wrapper {
operator T(){
return mode == endian::native ? value : swap_endian(value);
p">}
union {
T value;
gp::array<uint8_t, sizeof(T)> bytes;
};
}
endian_wrapper() {}
endian_wrapper(T v)
: value{mode == endian::native ? v : swap_endian(v)} {}
endian_wrapper(endian_wrapper& v)
: value{v.value} {}
endian_wrapper& operator=(T p) {
value = mode == endian::native ? p : swap_endian(p);
return *this;
}
operator T() {
return mode == endian::native ? value : swap_endian(value);
}
};
}

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