projects / thirdparty / binutils-gdb.git / blame
| Commit | Line | Data |
|---|---|---|
| 72f33921 | 1 | /* Interface to byteswapping functions. |
| 250d07de | 2 | Copyright (C) 2006-2021 Free Software Foundation, Inc. |
| 72f33921 NA |
3 | |
| 4 | This file is part of libctf. | |
| 5 | ||
| 6 | libctf is free software; you can redistribute it and/or modify it under | |
| 7 | the terms of the GNU General Public License as published by the Free | |
| 8 | Software Foundation; either version 3, or (at your option) any later | |
| 9 | version. | |
| 10 | ||
| 11 | This program is distributed in the hope that it will be useful, but | |
| 12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | |
| 14 | See the GNU General Public License for more details. | |
| 15 | ||
| 16 | You should have received a copy of the GNU General Public License | |
| 17 | along with this program; see the file COPYING. If not see | |
| 18 | <http://www.gnu.org/licenses/>. */ | |
| 19 | ||
| 20 | #ifndef _CTF_SWAP_H | |
| 21 | #define _CTF_SWAP_H | |
| 22 | ||
| 23 | #include "config.h" | |
| 24 | #include <stdint.h> | |
| 53651de8 | 25 | #include <assert.h> |
| 72f33921 NA |
26 | |
| 27 | #ifdef HAVE_BYTESWAP_H | |
| 28 | #include <byteswap.h> | |
| e755667f | 29 | #endif /* defined(HAVE_BYTESWAP_H) */ |
| 72f33921 NA |
30 | |
| 31 | /* Provide our own versions of the byteswap functions. */ | |
| e755667f NA |
32 | |
| 33 | #if !HAVE_DECL_BSWAP_16 | |
| cbbbc402 | 34 | static inline uint16_t |
| a0486bac | 35 | bswap_16 (uint16_t v) |
| 72f33921 NA |
36 | { |
| 37 | return ((v >> 8) & 0xff) | ((v & 0xff) << 8); | |
| 38 | } | |
| e755667f | 39 | #endif /* !HAVE_DECL_BSWAP16 */ |
| 72f33921 | 40 | |
| e755667f | 41 | #if !HAVE_DECL_BSWAP_32 |
| cbbbc402 | 42 | static inline uint32_t |
| a0486bac | 43 | bswap_32 (uint32_t v) |
| 72f33921 NA |
44 | { |
| 45 | return ( ((v & 0xff000000) >> 24) | |
| 46 | | ((v & 0x00ff0000) >> 8) | |
| 47 | | ((v & 0x0000ff00) << 8) | |
| 48 | | ((v & 0x000000ff) << 24)); | |
| 49 | } | |
| e755667f | 50 | #endif /* !HAVE_DECL_BSWAP32 */ |
| 72f33921 | 51 | |
| e755667f | 52 | #if !HAVE_DECL_BSWAP_64 |
| cbbbc402 | 53 | static inline uint64_t |
| a0486bac | 54 | bswap_64 (uint64_t v) |
| 72f33921 NA |
55 | { |
| 56 | return ( ((v & 0xff00000000000000ULL) >> 56) | |
| 57 | | ((v & 0x00ff000000000000ULL) >> 40) | |
| 58 | | ((v & 0x0000ff0000000000ULL) >> 24) | |
| 59 | | ((v & 0x000000ff00000000ULL) >> 8) | |
| 60 | | ((v & 0x00000000ff000000ULL) << 8) | |
| 61 | | ((v & 0x0000000000ff0000ULL) << 24) | |
| 62 | | ((v & 0x000000000000ff00ULL) << 40) | |
| 63 | | ((v & 0x00000000000000ffULL) << 56)); | |
| 64 | } | |
| e755667f | 65 | #endif /* !HAVE_DECL_BSWAP64 */ |
| 72f33921 | 66 | |
| 53651de8 NA |
67 | /* < C11? define away static assertions. */ |
| 68 | ||
| 69 | #if !defined (__STDC_VERSION__) || __STDC_VERSION__ < 201112L | |
| 70 | #define _Static_assert(cond, err) | |
| 71 | #endif | |
| 72 | ||
| 73 | /* Swap the endianness of something. */ | |
| 74 | ||
| 75 | #define swap_thing(x) \ | |
| 76 | do { \ | |
| 77 | _Static_assert (sizeof (x) == 1 || (sizeof (x) % 2 == 0 \ | |
| 78 | && sizeof (x) <= 8), \ | |
| 79 | "Invalid size, update endianness code"); \ | |
| 80 | switch (sizeof (x)) { \ | |
| 81 | case 2: x = bswap_16 (x); break; \ | |
| 82 | case 4: x = bswap_32 (x); break; \ | |
| 83 | case 8: x = bswap_64 (x); break; \ | |
| 84 | case 1: /* Nothing needs doing */ \ | |
| 85 | break; \ | |
| 86 | } \ | |
| 87 | } while (0); | |
| 88 | ||
| 89 | ||
| 72f33921 | 90 | #endif /* !defined(_CTF_SWAP_H) */ |