src/basic/sparse-endian.h

   1 /* SPDX-License-Identifier: MIT
   2  *
   3  * Copyright (c) 2012 Josh Triplett <josh@joshtriplett.org>
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a copy
   6  * of this software and associated documentation files (the "Software"), to
   7  * deal in the Software without restriction, including without limitation the
   8  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
   9  * sell copies of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be included in
  13  * all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  18  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23 #ifndef SPARSE_ENDIAN_H
  24 #define SPARSE_ENDIAN_H
  25
  26 #include <byteswap.h>
  27 #include <endian.h>
  28 #include <stdint.h>
  29
  30 #ifdef __CHECKER__
  31 #define __sd_bitwise __attribute__((bitwise))
  32 #define __sd_force __attribute__((force))
  33 #else
  34 #define __sd_bitwise
  35 #define __sd_force
  36 #endif
  37
  38 typedef uint16_t __sd_bitwise le16_t;
  39 typedef uint16_t __sd_bitwise be16_t;
  40 typedef uint32_t __sd_bitwise le32_t;
  41 typedef uint32_t __sd_bitwise be32_t;
  42 typedef uint64_t __sd_bitwise le64_t;
  43 typedef uint64_t __sd_bitwise be64_t;
  44
  45 #undef htobe16
  46 #undef htole16
  47 #undef be16toh
  48 #undef le16toh
  49 #undef htobe32
  50 #undef htole32
  51 #undef be32toh
  52 #undef le32toh
  53 #undef htobe64
  54 #undef htole64
  55 #undef be64toh
  56 #undef le64toh
  57
  58 #if __BYTE_ORDER == __LITTLE_ENDIAN
  59 #define bswap_16_on_le(x) __bswap_16(x)
  60 #define bswap_32_on_le(x) __bswap_32(x)
  61 #define bswap_64_on_le(x) __bswap_64(x)
  62 #define bswap_16_on_be(x) (x)
  63 #define bswap_32_on_be(x) (x)
  64 #define bswap_64_on_be(x) (x)
  65 #elif __BYTE_ORDER == __BIG_ENDIAN
  66 #define bswap_16_on_le(x) (x)
  67 #define bswap_32_on_le(x) (x)
  68 #define bswap_64_on_le(x) (x)
  69 #define bswap_16_on_be(x) __bswap_16(x)
  70 #define bswap_32_on_be(x) __bswap_32(x)
  71 #define bswap_64_on_be(x) __bswap_64(x)
  72 #endif
  73
  74 static inline le16_t htole16(uint16_t value) { return (le16_t __sd_force) bswap_16_on_be(value); }
  75 static inline le32_t htole32(uint32_t value) { return (le32_t __sd_force) bswap_32_on_be(value); }
  76 static inline le64_t htole64(uint64_t value) { return (le64_t __sd_force) bswap_64_on_be(value); }
  77
  78 static inline be16_t htobe16(uint16_t value) { return (be16_t __sd_force) bswap_16_on_le(value); }
  79 static inline be32_t htobe32(uint32_t value) { return (be32_t __sd_force) bswap_32_on_le(value); }
  80 static inline be64_t htobe64(uint64_t value) { return (be64_t __sd_force) bswap_64_on_le(value); }
  81
  82 static inline uint16_t le16toh(le16_t value) { return bswap_16_on_be((uint16_t __sd_force)value); }
  83 static inline uint32_t le32toh(le32_t value) { return bswap_32_on_be((uint32_t __sd_force)value); }
  84 static inline uint64_t le64toh(le64_t value) { return bswap_64_on_be((uint64_t __sd_force)value); }
  85
  86 static inline uint16_t be16toh(be16_t value) { return bswap_16_on_le((uint16_t __sd_force)value); }
  87 static inline uint32_t be32toh(be32_t value) { return bswap_32_on_le((uint32_t __sd_force)value); }
  88 static inline uint64_t be64toh(be64_t value) { return bswap_64_on_le((uint64_t __sd_force)value); }
  89
  90 #undef __sd_bitwise
  91 #undef __sd_force
  92
  93 #endif /* SPARSE_ENDIAN_H */