Add endianness conversion template functions.
This commit is contained in:
parent
7bcdb10d19
commit
c92f132007
3 changed files with 300 additions and 0 deletions
179
include/duckhandy/endianness.hpp
Normal file
179
include/duckhandy/endianness.hpp
Normal file
|
|
@ -0,0 +1,179 @@
|
|||
/* Copyright 2016, 2017 Michele Santullo
|
||||
* This file is part of "duckhandy".
|
||||
*
|
||||
* "duckhandy" 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, either version 3 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* "duckhandy" 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 for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with "duckhandy". If not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
|
||||
#ifndef id1A975372553B45BC8C4E42CDBDD97497
|
||||
#define id1A975372553B45BC8C4E42CDBDD97497
|
||||
|
||||
#include <cstdint>
|
||||
#include <endian.h>
|
||||
|
||||
namespace dhandy {
|
||||
template <typename T> constexpr T htobe (T parV);
|
||||
template <typename T> constexpr T htole (T parV);
|
||||
template <typename T> constexpr T betoh (T parV);
|
||||
template <typename T> constexpr T letoh (T parV);
|
||||
|
||||
template <>
|
||||
[[gnu::pure]] inline constexpr uint8_t htobe (uint8_t parV) {
|
||||
return parV;
|
||||
}
|
||||
template <>
|
||||
[[gnu::pure]] inline constexpr uint16_t htobe (uint16_t parV) {
|
||||
#if __BYTE_ORDER == __BIG_ENDIAN
|
||||
return parV;
|
||||
#elif __BYTE_ORDER == __LITTLE_ENDIAN
|
||||
return __builtin_bswap16(parV);
|
||||
#else
|
||||
# error "Unsupported endianness"
|
||||
#endif
|
||||
}
|
||||
template <>
|
||||
[[gnu::pure]] inline constexpr uint32_t htobe (uint32_t parV) {
|
||||
#if __BYTE_ORDER == __BIG_ENDIAN
|
||||
return parV;
|
||||
#elif __BYTE_ORDER == __LITTLE_ENDIAN
|
||||
return __builtin_bswap32(parV);
|
||||
#else
|
||||
# error "Unsupported endianness"
|
||||
#endif
|
||||
}
|
||||
template <>
|
||||
[[gnu::pure]] inline constexpr uint64_t htobe (uint64_t parV) {
|
||||
#if __BYTE_ORDER == __BIG_ENDIAN
|
||||
return parV;
|
||||
#elif __BYTE_ORDER == __LITTLE_ENDIAN
|
||||
return __builtin_bswap64(parV);
|
||||
#else
|
||||
# error "Unsupported endianness"
|
||||
#endif
|
||||
}
|
||||
template <>
|
||||
[[gnu::pure]] inline constexpr int8_t htobe (int8_t parV) {
|
||||
return parV;
|
||||
}
|
||||
template <>
|
||||
[[gnu::pure]] inline constexpr int16_t htobe (int16_t parV) {
|
||||
#if __BYTE_ORDER == __BIG_ENDIAN
|
||||
return parV;
|
||||
#elif __BYTE_ORDER == __LITTLE_ENDIAN
|
||||
return static_cast<int16_t>(__builtin_bswap16(static_cast<uint16_t>(parV)));
|
||||
#else
|
||||
# error "Unsupported endianness"
|
||||
#endif
|
||||
}
|
||||
template <>
|
||||
[[gnu::pure]] inline constexpr int32_t htobe (int32_t parV) {
|
||||
#if __BYTE_ORDER == __BIG_ENDIAN
|
||||
return parV;
|
||||
#elif __BYTE_ORDER == __LITTLE_ENDIAN
|
||||
return static_cast<int32_t>(__builtin_bswap32(static_cast<uint32_t>(parV)));
|
||||
#else
|
||||
# error "Unsupported endianness"
|
||||
#endif
|
||||
}
|
||||
template <>
|
||||
[[gnu::pure]] inline constexpr int64_t htobe (int64_t parV) {
|
||||
#if __BYTE_ORDER == __BIG_ENDIAN
|
||||
return parV;
|
||||
#elif __BYTE_ORDER == __LITTLE_ENDIAN
|
||||
return static_cast<int64_t>(__builtin_bswap64(static_cast<uint64_t>(parV)));
|
||||
#else
|
||||
# error "Unsupported endianness"
|
||||
#endif
|
||||
}
|
||||
|
||||
template <>
|
||||
[[gnu::pure]] inline constexpr uint8_t htole (uint8_t parV) {
|
||||
return parV;
|
||||
}
|
||||
template <>
|
||||
[[gnu::pure]] inline constexpr uint16_t htole (uint16_t parV) {
|
||||
#if __BYTE_ORDER == __BIG_ENDIAN
|
||||
return __builtin_bswap16(parV);
|
||||
#elif __BYTE_ORDER == __LITTLE_ENDIAN
|
||||
return parV;
|
||||
#else
|
||||
# error "Unsupported endianness"
|
||||
#endif
|
||||
}
|
||||
template <>
|
||||
[[gnu::pure]] inline constexpr uint32_t htole (uint32_t parV) {
|
||||
#if __BYTE_ORDER == __BIG_ENDIAN
|
||||
return __builtin_bswap32(parV);
|
||||
#elif __BYTE_ORDER == __LITTLE_ENDIAN
|
||||
return parV;
|
||||
#else
|
||||
# error "Unsupported endianness"
|
||||
#endif
|
||||
}
|
||||
template <>
|
||||
[[gnu::pure]] inline constexpr uint64_t htole (uint64_t parV) {
|
||||
#if __BYTE_ORDER == __BIG_ENDIAN
|
||||
return __builtin_bswap64(parV);
|
||||
#elif __BYTE_ORDER == __LITTLE_ENDIAN
|
||||
return parV;
|
||||
#else
|
||||
# error "Unsupported endianness"
|
||||
#endif
|
||||
}
|
||||
template <>
|
||||
[[gnu::pure]] inline constexpr int8_t htole (int8_t parV) {
|
||||
return parV;
|
||||
}
|
||||
template <>
|
||||
[[gnu::pure]] inline constexpr int16_t htole (int16_t parV) {
|
||||
#if __BYTE_ORDER == __BIG_ENDIAN
|
||||
return static_cast<int16_t>(__builtin_bswap16(static_cast<uint16_t>(parV)));
|
||||
#elif __BYTE_ORDER == __LITTLE_ENDIAN
|
||||
return parV;
|
||||
#else
|
||||
# error "Unsupported endianness"
|
||||
#endif
|
||||
}
|
||||
template <>
|
||||
[[gnu::pure]] inline constexpr int32_t htole (int32_t parV) {
|
||||
#if __BYTE_ORDER == __BIG_ENDIAN
|
||||
return static_cast<int32_t>(__builtin_bswap32(static_cast<uint32_t>(parV)));
|
||||
#elif __BYTE_ORDER == __LITTLE_ENDIAN
|
||||
return parV;
|
||||
#else
|
||||
# error "Unsupported endianness"
|
||||
#endif
|
||||
}
|
||||
template <>
|
||||
[[gnu::pure]] inline constexpr int64_t htole (int64_t parV) {
|
||||
#if __BYTE_ORDER == __BIG_ENDIAN
|
||||
return static_cast<int64_t>(__builtin_bswap64(static_cast<uint64_t>(parV)));
|
||||
#elif __BYTE_ORDER == __LITTLE_ENDIAN
|
||||
return parV;
|
||||
#else
|
||||
# error "Unsupported endianness"
|
||||
#endif
|
||||
}
|
||||
|
||||
template <typename T>
|
||||
[[gnu::pure]] inline constexpr T betoh (T parV) {
|
||||
return htobe<T>(parV);
|
||||
}
|
||||
|
||||
template <typename T>
|
||||
[[gnu::pure]] inline constexpr T letoh (T parV) {
|
||||
return htole<T>(parV);
|
||||
}
|
||||
} //namespace dhandy
|
||||
|
||||
#endif
|
||||
|
|
@ -3,6 +3,7 @@ project(dhandy_unit_test CXX)
|
|||
add_executable(${PROJECT_NAME}
|
||||
main.cpp
|
||||
lexical_cast_test.cpp
|
||||
endianness_test.cpp
|
||||
)
|
||||
set_property(TARGET ${PROJECT_NAME} PROPERTY CXX_STANDARD 11)
|
||||
set_property(TARGET ${PROJECT_NAME} PROPERTY CXX_STANDARD_REQUIRED ON)
|
||||
|
|
|
|||
120
test/unit/endianness_test.cpp
Normal file
120
test/unit/endianness_test.cpp
Normal file
|
|
@ -0,0 +1,120 @@
|
|||
/* Copyright 2017, Michele Santullo
|
||||
* This file is part of "duckhandy".
|
||||
*
|
||||
* "duckhandy" 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, either version 3 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* "duckhandy" 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 for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with "duckhandy". If not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
|
||||
#include "catch.hpp"
|
||||
#include "duckhandy/endianness.hpp"
|
||||
#include <endian.h>
|
||||
|
||||
TEST_CASE ("Host to little-endian", "[htole][endianness]") {
|
||||
using dhandy::htole;
|
||||
#if __BYTE_ORDER == __BIG_ENDIAN
|
||||
static_assert(htole<uint8_t>(0x12) == 0x12, "Wrong conversion");
|
||||
static_assert(htole<uint16_t>(0x1234) == 0x3412, "Wrong conversion");
|
||||
static_assert(htole<uint32_t>(0x12345678) == 0x78563412, "Wrong conversion");
|
||||
static_assert(htole<uint64_t>(0x123456789ABCDEF0) == 0xF0DEBC9A78563412, "Wrong conversion");
|
||||
#elif __BYTE_ORDER == __LITTLE_ENDIAN
|
||||
static_assert(htole<uint8_t>(0x12) == 0x12, "Wrong conversion");
|
||||
static_assert(htole<uint16_t>(0x1234) == 0x1234, "Wrong conversion");
|
||||
static_assert(htole<uint32_t>(0x12345678) == 0x12345678, "Wrong conversion");
|
||||
static_assert(htole<uint64_t>(0x123456789ABCDEF0) == 0x123456789ABCDEF0, "Wrong conversion");
|
||||
#endif
|
||||
|
||||
CHECK(htole<uint8_t>(0x12) == 0x12);
|
||||
CHECK(htole<uint16_t>(0x1234) == htole16(0x1234));
|
||||
CHECK(htole<uint32_t>(0x12345678) == htole32(0x12345678));
|
||||
CHECK(htole<uint64_t>(0x123456789ABCDEF0) == htole64(0x123456789ABCDEF0));
|
||||
|
||||
CHECK(htole<int8_t>(0xFE) == static_cast<int8_t>(0xFE));
|
||||
CHECK(htole<int16_t>(0xFEDC) == static_cast<int16_t>(htole16(0xFEDC)));
|
||||
CHECK(htole<int32_t>(0xFEDCBA09) == static_cast<int32_t>(htole32(0xFEDCBA09)));
|
||||
CHECK(htole<int64_t>(0xFEDCBA0987654321) == static_cast<int64_t>(htole64(0xFEDCBA0987654321)));
|
||||
}
|
||||
|
||||
TEST_CASE ("Little-endian to host", "[letoh][endianness]") {
|
||||
using dhandy::letoh;
|
||||
#if __BYTE_ORDER == __BIG_ENDIAN
|
||||
static_assert(letoh<uint8_t>(0x12) == 0x12, "Wrong conversion");
|
||||
static_assert(letoh<uint16_t>(0x1234) == 0x3412, "Wrong conversion");
|
||||
static_assert(letoh<uint32_t>(0x12345678) == 0x78563412, "Wrong conversion");
|
||||
static_assert(letoh<uint64_t>(0x123456789ABCDEF0) == 0xF0DEBC9A78563412, "Wrong conversion");
|
||||
#elif __BYTE_ORDER == __LITTLE_ENDIAN
|
||||
static_assert(letoh<uint8_t>(0x12) == 0x12, "Wrong conversion");
|
||||
static_assert(letoh<uint16_t>(0x1234) == 0x1234, "Wrong conversion");
|
||||
static_assert(letoh<uint32_t>(0x12345678) == 0x12345678, "Wrong conversion");
|
||||
static_assert(letoh<uint64_t>(0x123456789ABCDEF0) == 0x123456789ABCDEF0, "Wrong conversion");
|
||||
#endif
|
||||
|
||||
CHECK(letoh<uint8_t>(0x12) == 0x12);
|
||||
CHECK(letoh<uint16_t>(0x1234) == le16toh(0x1234));
|
||||
CHECK(letoh<uint32_t>(0x12345678) == le32toh(0x12345678));
|
||||
CHECK(letoh<uint64_t>(0x123456789ABCDEF0) == le64toh(0x123456789ABCDEF0));
|
||||
|
||||
CHECK(letoh<int8_t>(0xFE) == static_cast<int8_t>(0xFE));
|
||||
CHECK(letoh<int16_t>(0xFEDC) == static_cast<int16_t>(le16toh(0xFEDC)));
|
||||
CHECK(letoh<int32_t>(0xFEDCBA09) == static_cast<int32_t>(le32toh(0xFEDCBA09)));
|
||||
CHECK(letoh<int64_t>(0xFEDCBA0987654321) == static_cast<int64_t>(le64toh(0xFEDCBA0987654321)));
|
||||
}
|
||||
|
||||
TEST_CASE ("Host to big-endian", "[htobe][endianness]") {
|
||||
using dhandy::htobe;
|
||||
#if __BYTE_ORDER == __BIG_ENDIAN
|
||||
static_assert(htobe<uint8_t>(0x12) == 0x12, "Wrong conversion");
|
||||
static_assert(htobe<uint16_t>(0x1234) == 0x1234, "Wrong conversion");
|
||||
static_assert(htobe<uint32_t>(0x12345678) == 0x12345678, "Wrong conversion");
|
||||
static_assert(htobe<uint64_t>(0x123456789ABCDEF0) == 0x123456789ABCDEF0, "Wrong conversion");
|
||||
#elif __BYTE_ORDER == __LITTLE_ENDIAN
|
||||
static_assert(htobe<uint8_t>(0x12) == 0x12, "Wrong conversion");
|
||||
static_assert(htobe<uint16_t>(0x1234) == 0x3412, "Wrong conversion");
|
||||
static_assert(htobe<uint32_t>(0x12345678) == 0x78563412, "Wrong conversion");
|
||||
static_assert(htobe<uint64_t>(0x123456789ABCDEF0) == 0xF0DEBC9A78563412, "Wrong conversion");
|
||||
#endif
|
||||
|
||||
CHECK(htobe<uint8_t>(0x12) == 0x12);
|
||||
CHECK(htobe<uint16_t>(0x1234) == htobe16(0x1234));
|
||||
CHECK(htobe<uint32_t>(0x12345678) == htobe32(0x12345678));
|
||||
CHECK(htobe<uint64_t>(0x123456789ABCDEF0) == htobe64(0x123456789ABCDEF0));
|
||||
|
||||
CHECK(htobe<int8_t>(0xFE) == static_cast<int8_t>(0xFE));
|
||||
CHECK(htobe<int16_t>(0xFEDC) == static_cast<int16_t>(htobe16(0xFEDC)));
|
||||
CHECK(htobe<int32_t>(0xFEDCBA09) == static_cast<int32_t>(htobe32(0xFEDCBA09)));
|
||||
CHECK(htobe<int64_t>(0xFEDCBA0987654321) == static_cast<int64_t>(htobe64(0xFEDCBA0987654321)));
|
||||
}
|
||||
|
||||
TEST_CASE ("Big-endian to host", "[betoh][endianness]") {
|
||||
using dhandy::betoh;
|
||||
#if __BYTE_ORDER == __BIG_ENDIAN
|
||||
static_assert(betoh<uint8_t>(0x12) == 0x12, "Wrong conversion");
|
||||
static_assert(betoh<uint16_t>(0x1234) == 0x1234, "Wrong conversion");
|
||||
static_assert(betoh<uint32_t>(0x12345678) == 0x12345678, "Wrong conversion");
|
||||
static_assert(betoh<uint64_t>(0x123456789ABCDEF0) == 0x123456789ABCDEF0, "Wrong conversion");
|
||||
#elif __BYTE_ORDER == __LITTLE_ENDIAN
|
||||
static_assert(betoh<uint8_t>(0x12) == 0x12, "Wrong conversion");
|
||||
static_assert(betoh<uint16_t>(0x1234) == 0x3412, "Wrong conversion");
|
||||
static_assert(betoh<uint32_t>(0x12345678) == 0x78563412, "Wrong conversion");
|
||||
static_assert(betoh<uint64_t>(0x123456789ABCDEF0) == 0xF0DEBC9A78563412, "Wrong conversion");
|
||||
#endif
|
||||
|
||||
CHECK(betoh<uint8_t>(0x12) == 0x12);
|
||||
CHECK(betoh<uint16_t>(0x1234) == be16toh(0x1234));
|
||||
CHECK(betoh<uint32_t>(0x12345678) == be32toh(0x12345678));
|
||||
CHECK(betoh<uint64_t>(0x123456789ABCDEF0) == be64toh(0x123456789ABCDEF0));
|
||||
|
||||
CHECK(betoh<int8_t>(0xFE) == static_cast<int8_t>(0xFE));
|
||||
CHECK(betoh<int16_t>(0xFEDC) == static_cast<int16_t>(be16toh(0xFEDC)));
|
||||
CHECK(betoh<int32_t>(0xFEDCBA09) == static_cast<int32_t>(be32toh(0xFEDCBA09)));
|
||||
CHECK(betoh<int64_t>(0xFEDCBA0987654321) == static_cast<int64_t>(be64toh(0xFEDCBA0987654321)));
|
||||
}
|
||||
Loading…
Reference in a new issue