| 1 | /* |
| 2 | * SPDX-License-Identifier: MIT |
| 3 | * |
| 4 | * Copyright (C) 2012 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 _LTTNG_UST_ENDIAN_H |
| 30 | #define _LTTNG_UST_ENDIAN_H |
| 31 | |
| 32 | #if (defined(__linux__) || defined(__CYGWIN__)) |
| 33 | #include <endian.h> |
| 34 | #include <byteswap.h> |
| 35 | |
| 36 | #define lttng_ust_bswap_16(x) bswap_16(x) |
| 37 | #define lttng_ust_bswap_32(x) bswap_32(x) |
| 38 | #define lttng_ust_bswap_64(x) bswap_64(x) |
| 39 | |
| 40 | #define LTTNG_UST_BYTE_ORDER __BYTE_ORDER |
| 41 | #define LTTNG_UST_LITTLE_ENDIAN __LITTLE_ENDIAN |
| 42 | #define LTTNG_UST_BIG_ENDIAN __BIG_ENDIAN |
| 43 | |
| 44 | #ifdef __FLOAT_WORD_ORDER |
| 45 | #define LTTNG_UST_FLOAT_WORD_ORDER __FLOAT_WORD_ORDER |
| 46 | #else /* __FLOAT_WORD_ORDER */ |
| 47 | #define LTTNG_UST_FLOAT_WORD_ORDER __BYTE_ORDER |
| 48 | #endif /* __FLOAT_WORD_ORDER */ |
| 49 | |
| 50 | #elif defined(__FreeBSD__) |
| 51 | |
| 52 | #include <sys/endian.h> |
| 53 | |
| 54 | #define lttng_ust_bswap_16(x) bswap16(x) |
| 55 | #define lttng_ust_bswap_32(x) bswap32(x) |
| 56 | #define lttng_ust_bswap_64(x) bswap64(x) |
| 57 | |
| 58 | #define LTTNG_UST_BYTE_ORDER BYTE_ORDER |
| 59 | #define LTTNG_UST_LITTLE_ENDIAN LITTLE_ENDIAN |
| 60 | #define LTTNG_UST_BIG_ENDIAN BIG_ENDIAN |
| 61 | #define LTTNG_UST_FLOAT_WORD_ORDER BYTE_ORDER |
| 62 | |
| 63 | #else |
| 64 | #error "Please add support for your OS." |
| 65 | #endif |
| 66 | |
| 67 | #endif /* _LTTNG_UST_ENDIAN_H */ |