Shipwright/ZAPDTR/ZAPDUtils/Utils/BitConverter.h
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  subdir:   "ZAPDTR"
  merged:   "a53a53ea4"
upstream:
  origin:   "https://github.com/HarbourMasters/ZAPDTR.git"
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2022-03-22 02:54:48 +01:00

162 lines
6.1 KiB
C++

#pragma once
#include <cstdint>
#include <limits>
#include <vector>
class BitConverter
{
public:
static inline int8_t ToInt8BE(const uint8_t* data, int32_t offset)
{
return (uint8_t)data[offset + 0];
}
static inline int8_t ToInt8BE(const std::vector<uint8_t>& data, int32_t offset)
{
return (uint8_t)data[offset + 0];
}
static inline uint8_t ToUInt8BE(const uint8_t* data, int32_t offset)
{
return (uint8_t)data[offset + 0];
}
static inline uint8_t ToUInt8BE(const std::vector<uint8_t>& data, int32_t offset)
{
return (uint8_t)data[offset + 0];
}
static inline int16_t ToInt16BE(const uint8_t* data, int32_t offset)
{
return ((uint16_t)data[offset + 0] << 8) + (uint16_t)data[offset + 1];
}
static inline int16_t ToInt16BE(const std::vector<uint8_t>& data, int32_t offset)
{
return ((uint16_t)data[offset + 0] << 8) + (uint16_t)data[offset + 1];
}
static inline uint16_t ToUInt16BE(const uint8_t* data, int32_t offset)
{
return ((uint16_t)data[offset + 0] << 8) + (uint16_t)data[offset + 1];
}
static inline uint16_t ToUInt16BE(const std::vector<uint8_t>& data, int32_t offset)
{
return ((uint16_t)data[offset + 0] << 8) + (uint16_t)data[offset + 1];
}
static inline int32_t ToInt32BE(const uint8_t* data, int32_t offset)
{
return ((uint32_t)data[offset + 0] << 24) + ((uint32_t)data[offset + 1] << 16) +
((uint32_t)data[offset + 2] << 8) + (uint32_t)data[offset + 3];
}
static inline int32_t ToInt32BE(const std::vector<uint8_t>& data, int32_t offset)
{
return ((uint32_t)data[offset + 0] << 24) + ((uint32_t)data[offset + 1] << 16) +
((uint32_t)data[offset + 2] << 8) + (uint32_t)data[offset + 3];
}
static inline uint32_t ToUInt32BE(const uint8_t* data, int32_t offset)
{
return ((uint32_t)data[offset + 0] << 24) + ((uint32_t)data[offset + 1] << 16) +
((uint32_t)data[offset + 2] << 8) + (uint32_t)data[offset + 3];
}
static inline uint32_t ToUInt32BE(const std::vector<uint8_t>& data, int32_t offset)
{
return ((uint32_t)data[offset + 0] << 24) + ((uint32_t)data[offset + 1] << 16) +
((uint32_t)data[offset + 2] << 8) + (uint32_t)data[offset + 3];
}
static inline int64_t ToInt64BE(const uint8_t* data, int32_t offset)
{
return ((uint64_t)data[offset + 0] << 56) + ((uint64_t)data[offset + 1] << 48) +
((uint64_t)data[offset + 2] << 40) + ((uint64_t)data[offset + 3] << 32) +
((uint64_t)data[offset + 4] << 24) + ((uint64_t)data[offset + 5] << 16) +
((uint64_t)data[offset + 6] << 8) + ((uint64_t)data[offset + 7]);
}
static inline int64_t ToInt64BE(const std::vector<uint8_t>& data, int32_t offset)
{
return ((uint64_t)data[offset + 0] << 56) + ((uint64_t)data[offset + 1] << 48) +
((uint64_t)data[offset + 2] << 40) + ((uint64_t)data[offset + 3] << 32) +
((uint64_t)data[offset + 4] << 24) + ((uint64_t)data[offset + 5] << 16) +
((uint64_t)data[offset + 6] << 8) + ((uint64_t)data[offset + 7]);
}
static inline uint64_t ToUInt64BE(const uint8_t* data, int32_t offset)
{
return ((uint64_t)data[offset + 0] << 56) + ((uint64_t)data[offset + 1] << 48) +
((uint64_t)data[offset + 2] << 40) + ((uint64_t)data[offset + 3] << 32) +
((uint64_t)data[offset + 4] << 24) + ((uint64_t)data[offset + 5] << 16) +
((uint64_t)data[offset + 6] << 8) + ((uint64_t)data[offset + 7]);
}
static inline uint64_t ToUInt64BE(const std::vector<uint8_t>& data, int32_t offset)
{
return ((uint64_t)data[offset + 0] << 56) + ((uint64_t)data[offset + 1] << 48) +
((uint64_t)data[offset + 2] << 40) + ((uint64_t)data[offset + 3] << 32) +
((uint64_t)data[offset + 4] << 24) + ((uint64_t)data[offset + 5] << 16) +
((uint64_t)data[offset + 6] << 8) + ((uint64_t)data[offset + 7]);
}
static inline float ToFloatBE(const uint8_t* data, int32_t offset)
{
float value;
uint32_t floatData = ((uint32_t)data[offset + 0] << 24) +
((uint32_t)data[offset + 1] << 16) +
((uint32_t)data[offset + 2] << 8) + (uint32_t)data[offset + 3];
static_assert(sizeof(uint32_t) == sizeof(float), "expected 32-bit float");
std::memcpy(&value, &floatData, sizeof(value));
return value;
}
static inline float ToFloatBE(const std::vector<uint8_t>& data, int32_t offset)
{
float value;
uint32_t floatData = ((uint32_t)data[offset + 0] << 24) +
((uint32_t)data[offset + 1] << 16) +
((uint32_t)data[offset + 2] << 8) + (uint32_t)data[offset + 3];
static_assert(sizeof(uint32_t) == sizeof(float), "expected 32-bit float");
std::memcpy(&value, &floatData, sizeof(value));
return value;
}
static inline double ToDoubleBE(const uint8_t* data, int32_t offset)
{
double value;
uint64_t floatData =
((uint64_t)data[offset + 0] << 56) + ((uint64_t)data[offset + 1] << 48) +
((uint64_t)data[offset + 2] << 40) + ((uint64_t)data[offset + 3] << 32) +
((uint64_t)data[offset + 4] << 24) + ((uint64_t)data[offset + 5] << 16) +
((uint64_t)data[offset + 6] << 8) + ((uint64_t)data[offset + 7]);
static_assert(sizeof(uint64_t) == sizeof(double), "expected 64-bit double");
// Checks if the float format on the platform the ZAPD binary is running on supports the
// same float format as the object file.
static_assert(std::numeric_limits<float>::is_iec559,
"expected IEC559 floats on host machine");
std::memcpy(&value, &floatData, sizeof(value));
return value;
}
static inline double ToDoubleBE(const std::vector<uint8_t>& data, int32_t offset)
{
double value;
uint64_t floatData =
((uint64_t)data[offset + 0] << 56) + ((uint64_t)data[offset + 1] << 48) +
((uint64_t)data[offset + 2] << 40) + ((uint64_t)data[offset + 3] << 32) +
((uint64_t)data[offset + 4] << 24) + ((uint64_t)data[offset + 5] << 16) +
((uint64_t)data[offset + 6] << 8) + ((uint64_t)data[offset + 7]);
static_assert(sizeof(uint64_t) == sizeof(double), "expected 64-bit double");
// Checks if the float format on the platform the ZAPD binary is running on supports the
// same float format as the object file.
static_assert(std::numeric_limits<double>::is_iec559,
"expected IEC559 doubles on host machine");
std::memcpy(&value, &floatData, sizeof(value));
return value;
}
};