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Diffstat (limited to 'include/flatcc/portable/punaligned.h')
| -rw-r--r-- | include/flatcc/portable/punaligned.h | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/include/flatcc/portable/punaligned.h b/include/flatcc/portable/punaligned.h new file mode 100644 index 0000000..a380edd --- /dev/null +++ b/include/flatcc/portable/punaligned.h @@ -0,0 +1,190 @@ +/* + * Copyright (c) 2016 Mikkel Fahnøe Jørgensen, dvide.com + * + * (MIT License) + * 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 PUNLIGNED_H +#define PUNLIGNED_H + +#ifdef __cplusplus +extern "C" { +#endif + +#ifndef PORTABLE_UNALIGNED_ACCESS + +#if defined(__i386__) || defined(__x86_64__) || defined(_M_IX86) || defined(_M_X64) +#define PORTABLE_UNALIGNED_ACCESS 1 +#else +#define PORTABLE_UNALIGNED_ACCESS 0 +#endif + +#endif + +/* `unaligned_read_16` might not be defined if endianness was not determined. */ +#if !defined(unaligned_read_le16toh) + +#include "pendian.h" + +#ifndef UINT8_MAX +#include <stdint.h> +#endif + +#if PORTABLE_UNALIGNED_ACCESS + +#define unaligned_read_16(p) (*(uint16_t*)(p)) +#define unaligned_read_32(p) (*(uint32_t*)(p)) +#define unaligned_read_64(p) (*(uint64_t*)(p)) + +#define unaligned_read_le16toh(p) le16toh(*(uint16_t*)(p)) +#define unaligned_read_le32toh(p) le32toh(*(uint32_t*)(p)) +#define unaligned_read_le64toh(p) le64toh(*(uint64_t*)(p)) + +#define unaligned_read_be16toh(p) be16toh(*(uint16_t*)(p)) +#define unaligned_read_be32toh(p) be32toh(*(uint32_t*)(p)) +#define unaligned_read_be64toh(p) be64toh(*(uint64_t*)(p)) + +#define unaligned_write_16(p, v) (*(uint16_t*)(p) = (uint16_t)(v)) +#define unaligned_write_32(p, v) (*(uint32_t*)(p) = (uint32_t)(v)) +#define unaligned_write_64(p, v) (*(uint64_t*)(p) = (uint64_t)(v)) + +#define unaligned_write_htole16(p, v) (*(uint16_t*)(p) = htole16(v)) +#define unaligned_write_htole32(p, v) (*(uint32_t*)(p) = htole32(v)) +#define unaligned_write_htole64(p, v) (*(uint64_t*)(p) = htole64(v)) + +#define unaligned_write_htobe16(p, v) (*(uint16_t*)(p) = htobe16(v)) +#define unaligned_write_htobe32(p, v) (*(uint32_t*)(p) = htobe32(v)) +#define unaligned_write_htobe64(p, v) (*(uint64_t*)(p) = htobe64(v)) + +#else + +#define unaligned_read_le16toh(p) ( \ + (((uint16_t)(((uint8_t *)(p))[0])) << 0) | \ + (((uint16_t)(((uint8_t *)(p))[1])) << 8)) + +#define unaligned_read_le32toh(p) ( \ + (((uint32_t)(((uint8_t *)(p))[0])) << 0) | \ + (((uint32_t)(((uint8_t *)(p))[1])) << 8) | \ + (((uint32_t)(((uint8_t *)(p))[2])) << 16) | \ + (((uint32_t)(((uint8_t *)(p))[3])) << 24)) + +#define unaligned_read_le64toh(p) ( \ + (((uint64_t)(((uint8_t *)(p))[0])) << 0) | \ + (((uint64_t)(((uint8_t *)(p))[1])) << 8) | \ + (((uint64_t)(((uint8_t *)(p))[2])) << 16) | \ + (((uint64_t)(((uint8_t *)(p))[3])) << 24) | \ + (((uint64_t)(((uint8_t *)(p))[4])) << 32) | \ + (((uint64_t)(((uint8_t *)(p))[5])) << 40) | \ + (((uint64_t)(((uint8_t *)(p))[6])) << 48) | \ + (((uint64_t)(((uint8_t *)(p))[7])) << 56)) + +#define unaligned_read_be16toh(p) ( \ + (((uint16_t)(((uint8_t *)(p))[0])) << 8) | \ + (((uint16_t)(((uint8_t *)(p))[1])) << 0)) + +#define unaligned_read_be32toh(p) ( \ + (((uint32_t)(((uint8_t *)(p))[0])) << 24) | \ + (((uint32_t)(((uint8_t *)(p))[1])) << 16) | \ + (((uint32_t)(((uint8_t *)(p))[2])) << 8) | \ + (((uint32_t)(((uint8_t *)(p))[3])) << 0)) + +#define unaligned_read_be64toh(p) ( \ + (((uint64_t)(((uint8_t *)(p))[0])) << 56) | \ + (((uint64_t)(((uint8_t *)(p))[1])) << 48) | \ + (((uint64_t)(((uint8_t *)(p))[2])) << 40) | \ + (((uint64_t)(((uint8_t *)(p))[3])) << 32) | \ + (((uint64_t)(((uint8_t *)(p))[4])) << 24) | \ + (((uint64_t)(((uint8_t *)(p))[5])) << 16) | \ + (((uint64_t)(((uint8_t *)(p))[6])) << 8) | \ + (((uint64_t)(((uint8_t *)(p))[7])) << 0)) + +#define unaligned_write_htole16(p, v) do { \ + ((uint8_t *)(p))[0] = (uint8_t)(((uint16_t)(v)) >> 0); \ + ((uint8_t *)(p))[1] = (uint8_t)(((uint16_t)(v)) >> 8); \ + } while (0) + +#define unaligned_write_htole32(p, v) do { \ + ((uint8_t *)(p))[0] = (uint8_t)(((uint32_t)(v)) >> 0); \ + ((uint8_t *)(p))[1] = (uint8_t)(((uint32_t)(v)) >> 8); \ + ((uint8_t *)(p))[2] = (uint8_t)(((uint32_t)(v)) >> 16); \ + ((uint8_t *)(p))[3] = (uint8_t)(((uint32_t)(v)) >> 24); \ + } while (0) + +#define unaligned_write_htole64(p) do { \ + ((uint8_t *)(p))[0] = (uint8_t)(((uint64_t)(v)) >> 0); \ + ((uint8_t *)(p))[1] = (uint8_t)(((uint64_t)(v)) >> 8); \ + ((uint8_t *)(p))[2] = (uint8_t)(((uint64_t)(v)) >> 16); \ + ((uint8_t *)(p))[3] = (uint8_t)(((uint64_t)(v)) >> 24); \ + ((uint8_t *)(p))[4] = (uint8_t)(((uint64_t)(v)) >> 32); \ + ((uint8_t *)(p))[5] = (uint8_t)(((uint64_t)(v)) >> 40); \ + ((uint8_t *)(p))[6] = (uint8_t)(((uint64_t)(v)) >> 48); \ + ((uint8_t *)(p))[7] = (uint8_t)(((uint64_t)(v)) >> 56); \ + } while (0) + +#define unaligned_write_htobe16(p, v) do { \ + ((uint8_t *)(p))[0] = (uint8_t)(((uint16_t)(v)) >> 8); \ + ((uint8_t *)(p))[1] = (uint8_t)(((uint16_t)(v)) >> 0); \ + } while (0) + +#define unaligned_write_htobe32(p, v) do { \ + ((uint8_t *)(p))[0] = (uint8_t)(((uint32_t)(v)) >> 24); \ + ((uint8_t *)(p))[1] = (uint8_t)(((uint32_t)(v)) >> 16); \ + ((uint8_t *)(p))[2] = (uint8_t)(((uint32_t)(v)) >> 8); \ + ((uint8_t *)(p))[3] = (uint8_t)(((uint32_t)(v)) >> 0); \ + } while (0) + +#define unaligned_write_htobe64(p) do { \ + ((uint8_t *)(p))[0] = (uint8_t)(((uint64_t)(v)) >> 56); \ + ((uint8_t *)(p))[1] = (uint8_t)(((uint64_t)(v)) >> 48); \ + ((uint8_t *)(p))[2] = (uint8_t)(((uint64_t)(v)) >> 40); \ + ((uint8_t *)(p))[3] = (uint8_t)(((uint64_t)(v)) >> 32); \ + ((uint8_t *)(p))[4] = (uint8_t)(((uint64_t)(v)) >> 24); \ + ((uint8_t *)(p))[5] = (uint8_t)(((uint64_t)(v)) >> 16); \ + ((uint8_t *)(p))[6] = (uint8_t)(((uint64_t)(v)) >> 8); \ + ((uint8_t *)(p))[7] = (uint8_t)(((uint64_t)(v)) >> 0); \ + } while (0) + +#if __LITTLE_ENDIAN__ +#define unaligned_read_16(p) unaligned_read_le16toh(p) +#define unaligned_read_32(p) unaligned_read_le32toh(p) +#define unaligned_read_64(p) unaligned_read_le64toh(p) + +#define unaligned_write_16(p) unaligned_write_htole16(p) +#define unaligned_write_32(p) unaligned_write_htole32(p) +#define unaligned_write_64(p) unaligned_write_htole64(p) +#endif + +#if __BIG_ENDIAN__ +#define unaligned_read_16(p) unaligned_read_be16toh(p) +#define unaligned_read_32(p) unaligned_read_be32toh(p) +#define unaligned_read_64(p) unaligned_read_be64toh(p) + +#define unaligned_write_16(p) unaligned_write_htobe16(p) +#define unaligned_write_32(p) unaligned_write_htobe32(p) +#define unaligned_write_64(p) unaligned_write_htobe64(p) +#endif + +#endif + +#endif + +#ifdef __cplusplus +} +#endif + +#endif /* PUNALIGNED_H */ |