Skip to content

Instantly share code, notes, and snippets.

Embed
What would you like to do?
#ifndef INT_PACK_HPP
#define INT_PACK_HPP
#include <cstdint>
#include <type_traits>
inline std::uint16_t int_pack_16(std::uint8_t a, std::uint8_t b)
{
const std::uint16_t x[] = {a, b};
return static_cast<std::uint16_t>(
(x[0]) | (x[1] << 8)
);
}
inline std::uint32_t int_pack_32(std::uint8_t a, std::uint8_t b, std::uint8_t c, std::uint8_t d)
{
const std::uint32_t x[] = {a, b, c, d};
return static_cast<std::uint32_t>(
(x[0]) | (x[1] << 8) | (x[2] << 16) | (x[3] << 24)
);
}
inline std::uint32_t int_pack_32(std::uint16_t a, std::uint16_t b)
{
const std::uint32_t x[] = {a, b};
return static_cast<std::uint32_t>(
(x[0]) | (x[1] << 16)
);
}
inline std::uint64_t int_pack_64(std::uint8_t a, std::uint8_t b, std::uint8_t c, std::uint8_t d,
std::uint8_t e, std::uint8_t f, std::uint8_t g, std::uint8_t h)
{
const std::uint64_t x[] = {a, b, c, d, e, f, g, h};
return static_cast<std::uint64_t>(
(x[0] ) | (x[1] << 8) | (x[2] << 16) | (x[3] << 24) |
(x[3] << 32) | (x[4] << 40) | (x[5] << 48) | (x[6] << 56)
);
}
inline std::uint64_t int_pack_64(std::uint16_t a, std::uint16_t b, std::uint16_t c, std::uint16_t d)
{
const std::uint64_t x[] = {a, b, c, d};
return static_cast<std::uint64_t>(
(x[0]) | (x[1] << 16) | (x[2] << 32) | (x[3] << 48)
);
}
inline std::uint64_t int_pack_64(std::uint32_t a, std::uint32_t b)
{
const std::uint64_t x[] = {a, b};
return static_cast<std::uint64_t>(
(x[0]) | (x[1] << 32)
);
}
// ---
inline std::uint16_t int_pack_16(char* bytes)
{
return int_pack_16(bytes[0], bytes[1]);
}
inline std::uint32_t int_pack_32(char* bytes)
{
return int_pack_32(bytes[0], bytes[1], bytes[2], bytes[3]);
}
inline std::uint64_t int_pack_64(char* bytes)
{
return int_pack_64(bytes[0], bytes[1], bytes[2], bytes[3],
bytes[4], bytes[5], bytes[6], bytes[7]);
}
#endif // INT_PACK_HPP
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.