EVOLUTION-MANAGER

Edit File: byteorder.h

/* * Copyright (c) 2016-2017 Josef 'Jeff' Sipek <jeffpc@josefsipek.net> * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #ifndef BYTEORDER_H #define BYTEORDER_H /* * These prototypes exist to catch bugs in the code generating macros below. */ /* return byte swapped input */ static inline uint64_t i_bswap_64(uint64_t in); static inline uint32_t i_bswap_32(uint32_t in); static inline uint16_t i_bswap_16(uint16_t in); static inline uint8_t i_bswap_8(uint8_t in); /* load an unaligned cpu native endian number from memory */ static inline uint64_t cpu64_to_cpu_unaligned(const void *in); static inline uint32_t cpu32_to_cpu_unaligned(const void *in); static inline uint16_t cpu16_to_cpu_unaligned(const void *in); static inline uint8_t cpu8_to_cpu_unaligned(const void *in); /* load an unaligned big endian number from memory */ static inline uint64_t be64_to_cpu_unaligned(const void *in); static inline uint32_t be32_to_cpu_unaligned(const void *in); static inline uint16_t be16_to_cpu_unaligned(const void *in); static inline uint8_t be8_to_cpu_unaligned(const void *in); /* load an unaligned little endian number from memory */ static inline uint64_t le64_to_cpu_unaligned(const void *in); static inline uint32_t le32_to_cpu_unaligned(const void *in); static inline uint16_t le16_to_cpu_unaligned(const void *in); static inline uint8_t le8_to_cpu_unaligned(const void *in); /* store into memory a cpu native endian number as a big endian number */ static inline void cpu64_to_be_unaligned(uint64_t in, void *out); static inline void cpu32_to_be_unaligned(uint32_t in, void *out); static inline void cpu16_to_be_unaligned(uint16_t in, void *out); static inline void cpu8_to_be_unaligned(uint8_t in, void *out); /* store into memory a cpu native endian number as a little endian number */ static inline void cpu64_to_le_unaligned(uint64_t in, void *out); static inline void cpu32_to_le_unaligned(uint32_t in, void *out); static inline void cpu16_to_le_unaligned(uint16_t in, void *out); static inline void cpu8_to_le_unaligned(uint8_t in, void *out); /* convert a big endian input into cpu native endian */ static inline uint64_t be64_to_cpu(uint64_t in); static inline uint32_t be32_to_cpu(uint32_t in); static inline uint16_t be16_to_cpu(uint16_t in); static inline uint8_t be8_to_cpu(uint8_t in); /* convert a cpu native endian input into big endian */ static inline uint64_t cpu64_to_be(uint64_t in); static inline uint32_t cpu32_to_be(uint32_t in); static inline uint16_t cpu16_to_be(uint16_t in); static inline uint8_t cpu8_to_be(uint8_t in); /* convert a little endian input into cpu native endian */ static inline uint64_t le64_to_cpu(uint64_t in); static inline uint32_t le32_to_cpu(uint32_t in); static inline uint16_t le16_to_cpu(uint16_t in); static inline uint8_t le8_to_cpu(uint8_t in); /* convert a cpu native endian input into little endian */ static inline uint64_t cpu64_to_le(uint64_t in); static inline uint32_t cpu32_to_le(uint32_t in); static inline uint16_t cpu16_to_le(uint16_t in); static inline uint8_t cpu8_to_le(uint8_t in); /* * byte swapping */ static inline uint64_t i_bswap_64(uint64_t in) { return ((in & 0xff00000000000000ULL) >> 56) | ((in & 0x00ff000000000000ULL) >> 40) | ((in & 0x0000ff0000000000ULL) >> 24) | ((in & 0x000000ff00000000ULL) >> 8) | ((in & 0x00000000ff000000ULL) << 8) | ((in & 0x0000000000ff0000ULL) << 24) | ((in & 0x000000000000ff00ULL) << 40) | ((in & 0x00000000000000ffULL) << 56); } static inline uint32_t i_bswap_32(uint32_t in) { return ((in & 0xff000000) >> 24) | ((in & 0x00ff0000) >> 8) | ((in & 0x0000ff00) << 8) | ((in & 0x000000ff) << 24); } static inline uint16_t i_bswap_16(uint16_t in) { return ((in & 0xff00) >> 8) | ((in & 0x00ff) << 8); } static inline uint8_t i_bswap_8(uint8_t in) { return (in & 0xff); } /* * unaligned big-endian integer */ static inline uint64_t be64_to_cpu_unaligned(const void *in) { const uint8_t *p = (const uint8_t *) in; return (((uint64_t) p[0] << 56) | ((uint64_t) p[1] << 48) | ((uint64_t) p[2] << 40) | ((uint64_t) p[3] << 32) | ((uint64_t) p[4] << 24) | ((uint64_t) p[5] << 16) | ((uint64_t) p[6] << 8) | ((uint64_t) p[7])); } static inline void cpu64_to_be_unaligned(uint64_t in, void *out) { uint8_t *p = (uint8_t *) out; p[0] = (in >> 56) & 0xff; p[1] = (in >> 48) & 0xff; p[2] = (in >> 40) & 0xff; p[3] = (in >> 32) & 0xff; p[4] = (in >> 24) & 0xff; p[5] = (in >> 16) & 0xff; p[6] = (in >> 8) & 0xff; p[7] = in & 0xff; } static inline uint32_t be32_to_cpu_unaligned(const void *in) { const uint8_t *p = (const uint8_t *) in; return (((uint32_t) p[0] << 24) | ((uint32_t) p[1] << 16) | ((uint32_t) p[2] << 8) | ((uint32_t) p[3])); } static inline void cpu32_to_be_unaligned(uint32_t in, void *out) { uint8_t *p = (uint8_t *) out; p[0] = (in >> 24) & 0xff; p[1] = (in >> 16) & 0xff; p[2] = (in >> 8) & 0xff; p[3] = in & 0xff; } static inline uint16_t be16_to_cpu_unaligned(const void *in) { const uint8_t *p = (const uint8_t *) in; return (((uint16_t) p[0] << 8) | ((uint16_t) p[1])); } static inline void cpu16_to_be_unaligned(uint16_t in, void *out) { uint8_t *p = (uint8_t *) out; p[0] = (in >> 8) & 0xff; p[1] = in & 0xff; } static inline uint8_t be8_to_cpu_unaligned(const void *in) { return *((const uint8_t *) in); } static inline void cpu8_to_be_unaligned(uint8_t in, void *out) { uint8_t *p = (uint8_t *) out; *p = in; } /* * unaligned little-endian & cpu-endian integers */ #define __GEN(size, bswap) \ static inline uint##size##_t le##size##_to_cpu_unaligned(const void *in)\ { \ uint##size##_t x = be##size##_to_cpu_unaligned(in); \ /* we read a LE int as BE, so we always have to byte swap */ \ return i_bswap_##size(x); \ } \ static inline void cpu##size##_to_le_unaligned(uint##size##_t in, \ void *out) \ { \ /* we'll be writing in BE, so we always have to byte swap */ \ cpu##size##_to_be_unaligned(i_bswap_##size(in), out); \ } \ static inline uint##size##_t cpu##size##_to_cpu_unaligned(const void *in)\ { \ uint##size##_t x = be##size##_to_cpu_unaligned(in); \ return bswap; \ } #ifdef WORDS_BIGENDIAN #define GEN(size) __GEN(size, x) #else #define GEN(size) __GEN(size, i_bswap_##size(x)) #endif GEN(64) GEN(32) GEN(16) GEN(8) #undef __GEN #undef GEN /* * byte ordering */ #define ___GEN(from, size, to, bswap) \ static inline uint##size##_t from##size##_to_##to(uint##size##_t x) \ { \ return bswap; \ } #ifdef WORDS_BIGENDIAN #define __GEN(from, size, to, be, le) ___GEN(from, size, to, be) #else #define __GEN(from, size, to, be, le) ___GEN(from, size, to, le) #endif #define GEN(size) \ __GEN(be, size, cpu, x, i_bswap_##size(x)) \ __GEN(cpu, size, be, x, i_bswap_##size(x)) \ __GEN(le, size, cpu, i_bswap_##size(x), x) \ __GEN(cpu, size, le, i_bswap_##size(x), x) GEN(64) GEN(32) GEN(16) GEN(8) #undef ___GEN #undef __GEN #undef GEN #endif