projects / libside.git / blame
| Commit | Line | Data |
|---|---|---|
| 8bdd5c12 MD |
1 | // SPDX-License-Identifier: MIT |
| 2 | /* | |
| 3 | * | |
| 4 | * Copyright (C) 2012,2022 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
| 5 | */ | |
| 6 | ||
| 7 | /* | |
| 8 | * This header defines the following endian macros based on the current | |
| 9 | * platform endian headers: | |
| 10 | * | |
| 11 | * BYTE_ORDER this macro shall have a value equal to one | |
| 12 | * of the *_ENDIAN macros in this header. | |
| 13 | * FLOAT_WORD_ORDER this macro shall have a value equal to one | |
| 14 | * of the *_ENDIAN macros in this header. | |
| 15 | * LITTLE_ENDIAN if BYTE_ORDER == LITTLE_ENDIAN, the host | |
| 16 | * byte order is from least significant to | |
| 17 | * most significant. | |
| 18 | * BIG_ENDIAN if BYTE_ORDER == BIG_ENDIAN, the host byte | |
| 19 | * order is from most significant to least | |
| 20 | * significant. | |
| 21 | * | |
| 22 | * Direct byte swapping interfaces: | |
| 23 | * | |
| 24 | * uint16_t bswap_16(uint16_t x); (* swap bytes 16-bit word *) | |
| 25 | * uint32_t bswap_32(uint32_t x); (* swap bytes 32-bit word *) | |
| 26 | * uint64_t bswap_64(uint32_t x); (* swap bytes 64-bit word *) | |
| 27 | */ | |
| 28 | ||
| 29 | #ifndef _SIDE_ENDIAN_H | |
| 30 | #define _SIDE_ENDIAN_H | |
| 31 | ||
| f5e650d7 | 32 | #include <side/macros.h> |
| 8bdd5c12 MD |
33 | #include <math.h> |
| 34 | ||
| 35 | #if (defined(__linux__) || defined(__CYGWIN__)) | |
| 36 | #include <endian.h> | |
| 37 | #include <byteswap.h> | |
| 38 | ||
| 39 | #define side_bswap_16(x) bswap_16(x) | |
| 40 | #define side_bswap_32(x) bswap_32(x) | |
| 41 | #define side_bswap_64(x) bswap_64(x) | |
| 42 | ||
| 43 | #define SIDE_BYTE_ORDER __BYTE_ORDER | |
| 44 | #define SIDE_LITTLE_ENDIAN __LITTLE_ENDIAN | |
| 45 | #define SIDE_BIG_ENDIAN __BIG_ENDIAN | |
| 46 | ||
| 47 | #ifdef __FLOAT_WORD_ORDER | |
| 48 | #define SIDE_FLOAT_WORD_ORDER __FLOAT_WORD_ORDER | |
| 49 | #else /* __FLOAT_WORD_ORDER */ | |
| 50 | #define SIDE_FLOAT_WORD_ORDER __BYTE_ORDER | |
| 51 | #endif /* __FLOAT_WORD_ORDER */ | |
| 52 | ||
| 53 | #elif defined(__FreeBSD__) | |
| 54 | ||
| 55 | #include <sys/endian.h> | |
| 56 | ||
| 57 | #define side_bswap_16(x) bswap16(x) | |
| 58 | #define side_bswap_32(x) bswap32(x) | |
| 59 | #define side_bswap_64(x) bswap64(x) | |
| 60 | ||
| 61 | #define SIDE_BYTE_ORDER BYTE_ORDER | |
| 62 | #define SIDE_LITTLE_ENDIAN LITTLE_ENDIAN | |
| 63 | #define SIDE_BIG_ENDIAN BIG_ENDIAN | |
| 64 | #define SIDE_FLOAT_WORD_ORDER BYTE_ORDER | |
| 65 | ||
| 66 | #else | |
| 67 | #error "Please add support for your OS." | |
| 68 | #endif | |
| 69 | ||
| 084105d5 MD |
70 | #ifdef __cplusplus |
| 71 | extern "C" { | |
| 72 | #endif | |
| 73 | ||
| 8bdd5c12 MD |
74 | #ifdef __HAVE_FLOAT128 |
| 75 | static inline | |
| 76 | void side_bswap_128p(char *p) | |
| 77 | { | |
| 78 | int i; | |
| 79 | ||
| 80 | for (i = 0; i < 8; i++) | |
| 81 | p[i] = p[15 - i]; | |
| 82 | } | |
| 83 | #endif | |
| 84 | ||
| 084105d5 MD |
85 | #ifdef __cplusplus |
| 86 | } | |
| 87 | #endif | |
| 88 | ||
| f5e650d7 MD |
89 | #if SIDE_BITS_PER_LONG == 64 |
| 90 | # define side_bswap_pointer(x) side_bswap_64(x) | |
| 91 | #else | |
| 92 | # define side_bswap_pointer(x) side_bswap_32(x) | |
| 93 | #endif | |
| 94 | ||
| 8bdd5c12 | 95 | #endif /* _SIDE_ENDIAN_H */ |