diff options
author | Luke T. Shumaker <lukeshu@lukeshu.com> | 2025-01-19 15:14:39 -0700 |
---|---|---|
committer | Luke T. Shumaker <lukeshu@lukeshu.com> | 2025-01-19 15:43:56 -0700 |
commit | abc16ce9b5ba132769e14b4b3d649d79a92effc3 (patch) | |
tree | b7e24155458d33659fb0c2f4f1b0fcd716a86a6e | |
parent | 02188436a7cf4efcee88c7b5eed6a621abb19d6d (diff) |
libmisc: endian.h: Add 64-bit versions
-rw-r--r-- | libmisc/include/libmisc/endian.h | 80 | ||||
-rw-r--r-- | libmisc/tests/test_endian.c | 39 |
2 files changed, 103 insertions, 16 deletions
diff --git a/libmisc/include/libmisc/endian.h b/libmisc/include/libmisc/endian.h index b1bc55c..665a8c8 100644 --- a/libmisc/include/libmisc/endian.h +++ b/libmisc/include/libmisc/endian.h @@ -1,6 +1,6 @@ /* libmisc/endian.h - Endian-conversion helpers * - * Copyright (C) 2024 Luke T. Shumaker <lukeshu@lukeshu.com> + * Copyright (C) 2024-2025 Luke T. Shumaker <lukeshu@lukeshu.com> * SPDX-License-Identifier: AGPL-3.0-or-later */ @@ -71,6 +71,45 @@ static inline uint32_t uint32be_unmarshal(uint32be_t in) { return uint32be_decode(in.octets); } +typedef struct { + uint8_t octets[8]; +} uint64be_t; +static_assert(sizeof(uint64be_t) == 8); + +static inline size_t uint64be_encode(uint8_t *out, uint64_t in) { + out[0] = (uint8_t)((in >> 56) & 0xFF); + out[1] = (uint8_t)((in >> 48) & 0xFF); + out[2] = (uint8_t)((in >> 40) & 0xFF); + out[3] = (uint8_t)((in >> 32) & 0xFF); + out[4] = (uint8_t)((in >> 24) & 0xFF); + out[5] = (uint8_t)((in >> 16) & 0xFF); + out[6] = (uint8_t)((in >> 8) & 0xFF); + out[7] = (uint8_t)((in >> 0) & 0xFF); + return 8; +} + +static inline uint64_t uint64be_decode(uint8_t *in) { + return (((uint64_t)(in[0])) << 56) + | (((uint64_t)(in[1])) << 48) + | (((uint64_t)(in[2])) << 40) + | (((uint64_t)(in[3])) << 32) + | (((uint64_t)(in[4])) << 24) + | (((uint64_t)(in[5])) << 16) + | (((uint64_t)(in[6])) << 8) + | (((uint64_t)(in[7])) << 0) + ; +} + +static inline uint64be_t uint64be_marshal(uint64_t in) { + uint64be_t out; + uint64be_encode(out.octets, in); + return out; +} + +static inline uint64_t uint64be_unmarshal(uint64be_t in) { + return uint64be_decode(in.octets); +} + /* Little endian **************************************************************/ typedef struct { @@ -131,4 +170,43 @@ static inline uint32_t uint32le_unmarshal(uint32le_t in) { return uint32le_decode(in.octets); } +typedef struct { + uint8_t octets[8]; +} uint64le_t; +static_assert(sizeof(uint64le_t) == 8); + +static inline size_t uint64le_encode(uint8_t *out, uint64_t in) { + out[0] = (uint8_t)((in >> 0) & 0xFF); + out[1] = (uint8_t)((in >> 8) & 0xFF); + out[2] = (uint8_t)((in >> 16) & 0xFF); + out[3] = (uint8_t)((in >> 24) & 0xFF); + out[4] = (uint8_t)((in >> 32) & 0xFF); + out[5] = (uint8_t)((in >> 40) & 0xFF); + out[6] = (uint8_t)((in >> 48) & 0xFF); + out[7] = (uint8_t)((in >> 56) & 0xFF); + return 8; +} + +static inline uint64_t uint64le_decode(uint8_t *in) { + return (((uint64_t)(in[0])) << 0) + | (((uint64_t)(in[1])) << 8) + | (((uint64_t)(in[2])) << 16) + | (((uint64_t)(in[3])) << 24) + | (((uint64_t)(in[4])) << 32) + | (((uint64_t)(in[5])) << 40) + | (((uint64_t)(in[6])) << 48) + | (((uint64_t)(in[7])) << 56) + ; +} + +static inline uint64le_t uint64le_marshal(uint64_t in) { + uint64le_t out; + uint64le_encode(out.octets, in); + return out; +} + +static inline uint64_t uint64le_unmarshal(uint64le_t in) { + return uint64le_decode(in.octets); +} + #endif /* _LIBMISC_ENDIAN_H_ */ diff --git a/libmisc/tests/test_endian.c b/libmisc/tests/test_endian.c index d0b547c..dcb3cc2 100644 --- a/libmisc/tests/test_endian.c +++ b/libmisc/tests/test_endian.c @@ -1,6 +1,6 @@ /* libmisc/tests/test_endian.c - Tests for <libmisc/endian.h> * - * Copyright (C) 2024 Luke T. Shumaker <lukeshu@lukeshu.com> + * Copyright (C) 2024-2025 Luke T. Shumaker <lukeshu@lukeshu.com> * SPDX-License-Identifier: AGPL-3.0-or-later */ @@ -11,22 +11,31 @@ #include "test.h" int main() { - uint8_t act[12] = {0}; - uint16be_encode(&act[0], UINT16_C(0x1234)); - uint32be_encode(&act[2], UINT32_C(0x56789ABC)); - uint16le_encode(&act[6], UINT16_C(0x1234)); - uint32le_encode(&act[8], UINT32_C(0x56789ABC)); + uint8_t act[(2+4+8)*2] = {0}; + size_t pos = 0; + pos += uint16be_encode(&act[pos], UINT16_C(0x1234)); + pos += uint32be_encode(&act[pos], UINT32_C(0x56789ABC)); + pos += uint64be_encode(&act[pos], UINT64_C(0xAC589A93278CB30A)); + pos += uint16le_encode(&act[pos], UINT16_C(0x1234)); + pos += uint32le_encode(&act[pos], UINT32_C(0x56789ABC)); + pos += uint64le_encode(&act[pos], UINT64_C(0xAC589A93278CB30A)); - uint8_t exp[12] = { 0x12, 0x34, - 0x56, 0x78, 0x9A, 0xBC, - 0x34, 0x12, - 0xBC, 0x9A, 0x78, 0x56 }; - test_assert(memcmp(act, exp, 12) == 0); + test_assert(pos == sizeof(act)); + uint8_t exp[(2+4+8)*2] = { 0x12, 0x34, + 0x56, 0x78, 0x9A, 0xBC, + 0xAC, 0x58, 0x9A, 0x93, 0x27, 0x8C, 0xB3, 0x0A, + 0x34, 0x12, + 0xBC, 0x9A, 0x78, 0x56, + 0x0A, 0xB3, 0x8C, 0x27, 0x93, 0x9A, 0x58, 0xAC}; + test_assert(memcmp(act, exp, sizeof(act)) == 0); - test_assert(uint16be_decode(&act[0]) == UINT16_C(0x1234)); - test_assert(uint32be_decode(&act[2]) == UINT32_C(0x56789ABC)); - test_assert(uint16le_decode(&act[6]) == UINT16_C(0x1234)); - test_assert(uint32le_decode(&act[8]) == UINT32_C(0x56789ABC)); + pos = 0; + test_assert(uint16be_decode(&act[pos]) == UINT16_C(0x1234)); pos += 2; + test_assert(uint32be_decode(&act[pos]) == UINT32_C(0x56789ABC)); pos += 4; + test_assert(uint64be_decode(&act[pos]) == UINT64_C(0xAC589A93278CB30A)); pos += 8; + test_assert(uint16le_decode(&act[pos]) == UINT16_C(0x1234)); pos += 2; + test_assert(uint32le_decode(&act[pos]) == UINT32_C(0x56789ABC)); pos += 4; + test_assert(uint64le_decode(&act[pos]) == UINT64_C(0xAC589A93278CB30A)); pos += 8; return 0; } |