diff options
Diffstat (limited to 'src/compat/endian.h')
| -rw-r--r-- | src/compat/endian.h | 241 |
1 files changed, 37 insertions, 204 deletions
diff --git a/src/compat/endian.h b/src/compat/endian.h index 882de2dbf0..4f58428153 100644 --- a/src/compat/endian.h +++ b/src/compat/endian.h @@ -5,237 +5,70 @@ #ifndef BITCOIN_COMPAT_ENDIAN_H #define BITCOIN_COMPAT_ENDIAN_H -#if defined(HAVE_CONFIG_H) -#include <config/bitcoin-config.h> -#endif - #include <compat/byteswap.h> +#include <bit> #include <cstdint> -#if defined(HAVE_ENDIAN_H) -#include <endian.h> -#elif defined(HAVE_SYS_ENDIAN_H) -#include <sys/endian.h> -#endif - -#ifndef HAVE_CONFIG_H -// While not technically a supported configuration, defaulting to defining these -// DECLs when we were compiled without autotools makes it easier for other build -// systems to build things like libbitcoinconsensus for strange targets. -#ifdef htobe16 -#define HAVE_DECL_HTOBE16 1 -#endif -#ifdef htole16 -#define HAVE_DECL_HTOLE16 1 -#endif -#ifdef be16toh -#define HAVE_DECL_BE16TOH 1 -#endif -#ifdef le16toh -#define HAVE_DECL_LE16TOH 1 -#endif - -#ifdef htobe32 -#define HAVE_DECL_HTOBE32 1 -#endif -#ifdef htole32 -#define HAVE_DECL_HTOLE32 1 -#endif -#ifdef be32toh -#define HAVE_DECL_BE32TOH 1 -#endif -#ifdef le32toh -#define HAVE_DECL_LE32TOH 1 -#endif - -#ifdef htobe64 -#define HAVE_DECL_HTOBE64 1 -#endif -#ifdef htole64 -#define HAVE_DECL_HTOLE64 1 -#endif -#ifdef be64toh -#define HAVE_DECL_BE64TOH 1 -#endif -#ifdef le64toh -#define HAVE_DECL_LE64TOH 1 -#endif - -#endif // HAVE_CONFIG_H - -#if defined(WORDS_BIGENDIAN) - -#if HAVE_DECL_HTOBE16 == 0 -inline uint16_t htobe16(uint16_t host_16bits) -{ - return host_16bits; -} -#endif // HAVE_DECL_HTOBE16 - -#if HAVE_DECL_HTOLE16 == 0 -inline uint16_t htole16(uint16_t host_16bits) -{ - return bswap_16(host_16bits); -} -#endif // HAVE_DECL_HTOLE16 - -#if HAVE_DECL_BE16TOH == 0 -inline uint16_t be16toh(uint16_t big_endian_16bits) -{ - return big_endian_16bits; -} -#endif // HAVE_DECL_BE16TOH - -#if HAVE_DECL_LE16TOH == 0 -inline uint16_t le16toh(uint16_t little_endian_16bits) -{ - return bswap_16(little_endian_16bits); -} -#endif // HAVE_DECL_LE16TOH - -#if HAVE_DECL_HTOBE32 == 0 -inline uint32_t htobe32(uint32_t host_32bits) -{ - return host_32bits; -} -#endif // HAVE_DECL_HTOBE32 - -#if HAVE_DECL_HTOLE32 == 0 -inline uint32_t htole32(uint32_t host_32bits) -{ - return bswap_32(host_32bits); -} -#endif // HAVE_DECL_HTOLE32 - -#if HAVE_DECL_BE32TOH == 0 -inline uint32_t be32toh(uint32_t big_endian_32bits) -{ - return big_endian_32bits; -} -#endif // HAVE_DECL_BE32TOH - -#if HAVE_DECL_LE32TOH == 0 -inline uint32_t le32toh(uint32_t little_endian_32bits) +inline BSWAP_CONSTEXPR uint16_t htobe16_internal(uint16_t host_16bits) { - return bswap_32(little_endian_32bits); + if constexpr (std::endian::native == std::endian::little) return internal_bswap_16(host_16bits); + else return host_16bits; } -#endif // HAVE_DECL_LE32TOH - -#if HAVE_DECL_HTOBE64 == 0 -inline uint64_t htobe64(uint64_t host_64bits) -{ - return host_64bits; -} -#endif // HAVE_DECL_HTOBE64 - -#if HAVE_DECL_HTOLE64 == 0 -inline uint64_t htole64(uint64_t host_64bits) -{ - return bswap_64(host_64bits); -} -#endif // HAVE_DECL_HTOLE64 - -#if HAVE_DECL_BE64TOH == 0 -inline uint64_t be64toh(uint64_t big_endian_64bits) -{ - return big_endian_64bits; -} -#endif // HAVE_DECL_BE64TOH - -#if HAVE_DECL_LE64TOH == 0 -inline uint64_t le64toh(uint64_t little_endian_64bits) -{ - return bswap_64(little_endian_64bits); -} -#endif // HAVE_DECL_LE64TOH - -#else // WORDS_BIGENDIAN - -#if HAVE_DECL_HTOBE16 == 0 -inline uint16_t htobe16(uint16_t host_16bits) +inline BSWAP_CONSTEXPR uint16_t htole16_internal(uint16_t host_16bits) { - return bswap_16(host_16bits); + if constexpr (std::endian::native == std::endian::big) return internal_bswap_16(host_16bits); + else return host_16bits; } -#endif // HAVE_DECL_HTOBE16 - -#if HAVE_DECL_HTOLE16 == 0 -inline uint16_t htole16(uint16_t host_16bits) +inline BSWAP_CONSTEXPR uint16_t be16toh_internal(uint16_t big_endian_16bits) { - return host_16bits; + if constexpr (std::endian::native == std::endian::little) return internal_bswap_16(big_endian_16bits); + else return big_endian_16bits; } -#endif // HAVE_DECL_HTOLE16 - -#if HAVE_DECL_BE16TOH == 0 -inline uint16_t be16toh(uint16_t big_endian_16bits) +inline BSWAP_CONSTEXPR uint16_t le16toh_internal(uint16_t little_endian_16bits) { - return bswap_16(big_endian_16bits); + if constexpr (std::endian::native == std::endian::big) return internal_bswap_16(little_endian_16bits); + else return little_endian_16bits; } -#endif // HAVE_DECL_BE16TOH - -#if HAVE_DECL_LE16TOH == 0 -inline uint16_t le16toh(uint16_t little_endian_16bits) +inline BSWAP_CONSTEXPR uint32_t htobe32_internal(uint32_t host_32bits) { - return little_endian_16bits; + if constexpr (std::endian::native == std::endian::little) return internal_bswap_32(host_32bits); + else return host_32bits; } -#endif // HAVE_DECL_LE16TOH - -#if HAVE_DECL_HTOBE32 == 0 -inline uint32_t htobe32(uint32_t host_32bits) -{ - return bswap_32(host_32bits); -} -#endif // HAVE_DECL_HTOBE32 - -#if HAVE_DECL_HTOLE32 == 0 -inline uint32_t htole32(uint32_t host_32bits) +inline BSWAP_CONSTEXPR uint32_t htole32_internal(uint32_t host_32bits) { - return host_32bits; + if constexpr (std::endian::native == std::endian::big) return internal_bswap_32(host_32bits); + else return host_32bits; } -#endif // HAVE_DECL_HTOLE32 - -#if HAVE_DECL_BE32TOH == 0 -inline uint32_t be32toh(uint32_t big_endian_32bits) +inline BSWAP_CONSTEXPR uint32_t be32toh_internal(uint32_t big_endian_32bits) { - return bswap_32(big_endian_32bits); + if constexpr (std::endian::native == std::endian::little) return internal_bswap_32(big_endian_32bits); + else return big_endian_32bits; } -#endif // HAVE_DECL_BE32TOH - -#if HAVE_DECL_LE32TOH == 0 -inline uint32_t le32toh(uint32_t little_endian_32bits) +inline BSWAP_CONSTEXPR uint32_t le32toh_internal(uint32_t little_endian_32bits) { - return little_endian_32bits; + if constexpr (std::endian::native == std::endian::big) return internal_bswap_32(little_endian_32bits); + else return little_endian_32bits; } -#endif // HAVE_DECL_LE32TOH - -#if HAVE_DECL_HTOBE64 == 0 -inline uint64_t htobe64(uint64_t host_64bits) +inline BSWAP_CONSTEXPR uint64_t htobe64_internal(uint64_t host_64bits) { - return bswap_64(host_64bits); + if constexpr (std::endian::native == std::endian::little) return internal_bswap_64(host_64bits); + else return host_64bits; } -#endif // HAVE_DECL_HTOBE64 - -#if HAVE_DECL_HTOLE64 == 0 -inline uint64_t htole64(uint64_t host_64bits) +inline BSWAP_CONSTEXPR uint64_t htole64_internal(uint64_t host_64bits) { - return host_64bits; + if constexpr (std::endian::native == std::endian::big) return internal_bswap_64(host_64bits); + else return host_64bits; } -#endif // HAVE_DECL_HTOLE64 - -#if HAVE_DECL_BE64TOH == 0 -inline uint64_t be64toh(uint64_t big_endian_64bits) +inline BSWAP_CONSTEXPR uint64_t be64toh_internal(uint64_t big_endian_64bits) { - return bswap_64(big_endian_64bits); + if constexpr (std::endian::native == std::endian::little) return internal_bswap_64(big_endian_64bits); + else return big_endian_64bits; } -#endif // HAVE_DECL_BE64TOH - -#if HAVE_DECL_LE64TOH == 0 -inline uint64_t le64toh(uint64_t little_endian_64bits) +inline BSWAP_CONSTEXPR uint64_t le64toh_internal(uint64_t little_endian_64bits) { - return little_endian_64bits; + if constexpr (std::endian::native == std::endian::big) return internal_bswap_64(little_endian_64bits); + else return little_endian_64bits; } -#endif // HAVE_DECL_LE64TOH - -#endif // WORDS_BIGENDIAN #endif // BITCOIN_COMPAT_ENDIAN_H |