120 lines
2.9 KiB
C
120 lines
2.9 KiB
C
// Copyright (c) 2014 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#ifndef BITCOIN_CRYPTO_COMMON_H
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#define BITCOIN_CRYPTO_COMMON_H
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#if defined(HAVE_CONFIG_H)
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#include "bitcoin-config.h"
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#endif
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#include <stdint.h>
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#if defined(HAVE_ENDIAN_H)
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#include <endian.h>
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#endif
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uint32_t static inline ReadLE32(const unsigned char* ptr)
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{
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#if HAVE_DECL_LE32TOH == 1
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return le32toh(*((uint32_t*)ptr));
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#elif !defined(WORDS_BIGENDIAN)
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return *((uint32_t*)ptr);
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#else
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return ((uint32_t)ptr[3] << 24 | (uint32_t)ptr[2] << 16 | (uint32_t)ptr[1] << 8 | (uint32_t)ptr[0]);
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#endif
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}
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uint64_t static inline ReadLE64(const unsigned char* ptr)
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{
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#if HAVE_DECL_LE64TOH == 1
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return le64toh(*((uint64_t*)ptr));
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#elif !defined(WORDS_BIGENDIAN)
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return *((uint64_t*)ptr);
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#else
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return ((uint64_t)ptr[7] << 56 | (uint64_t)ptr[6] << 48 | (uint64_t)ptr[5] << 40 | (uint64_t)ptr[4] << 32 |
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(uint64_t)ptr[3] << 24 | (uint64_t)ptr[2] << 16 | (uint64_t)ptr[1] << 8 | (uint64_t)ptr[0]);
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#endif
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}
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void static inline WriteLE32(unsigned char* ptr, uint32_t x)
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{
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#if HAVE_DECL_HTOLE32 == 1
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*((uint32_t*)ptr) = htole32(x);
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#elif !defined(WORDS_BIGENDIAN)
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*((uint32_t*)ptr) = x;
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#else
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ptr[3] = x >> 24;
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ptr[2] = x >> 16;
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ptr[1] = x >> 8;
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ptr[0] = x;
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#endif
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}
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void static inline WriteLE64(unsigned char* ptr, uint64_t x)
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{
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#if HAVE_DECL_HTOLE64 == 1
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*((uint64_t*)ptr) = htole64(x);
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#elif !defined(WORDS_BIGENDIAN)
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*((uint64_t*)ptr) = x;
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#else
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ptr[7] = x >> 56;
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ptr[6] = x >> 48;
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ptr[5] = x >> 40;
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ptr[4] = x >> 32;
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ptr[3] = x >> 24;
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ptr[2] = x >> 16;
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ptr[1] = x >> 8;
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ptr[0] = x;
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#endif
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}
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uint32_t static inline ReadBE32(const unsigned char* ptr)
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{
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#if HAVE_DECL_BE32TOH == 1
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return be32toh(*((uint32_t*)ptr));
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#else
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return ((uint32_t)ptr[0] << 24 | (uint32_t)ptr[1] << 16 | (uint32_t)ptr[2] << 8 | (uint32_t)ptr[3]);
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#endif
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}
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uint64_t static inline ReadBE64(const unsigned char* ptr)
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{
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#if HAVE_DECL_BE64TOH == 1
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return be64toh(*((uint64_t*)ptr));
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#else
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return ((uint64_t)ptr[0] << 56 | (uint64_t)ptr[1] << 48 | (uint64_t)ptr[2] << 40 | (uint64_t)ptr[3] << 32 |
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(uint64_t)ptr[4] << 24 | (uint64_t)ptr[5] << 16 | (uint64_t)ptr[6] << 8 | (uint64_t)ptr[7]);
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#endif
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}
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void static inline WriteBE32(unsigned char* ptr, uint32_t x)
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{
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#if HAVE_DECL_HTOBE32 == 1
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*((uint32_t*)ptr) = htobe32(x);
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#else
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ptr[0] = x >> 24;
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ptr[1] = x >> 16;
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ptr[2] = x >> 8;
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ptr[3] = x;
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#endif
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}
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void static inline WriteBE64(unsigned char* ptr, uint64_t x)
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{
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#if HAVE_DECL_HTOBE64 == 1
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*((uint64_t*)ptr) = htobe64(x);
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#else
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ptr[0] = x >> 56;
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ptr[1] = x >> 48;
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ptr[2] = x >> 40;
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ptr[3] = x >> 32;
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ptr[4] = x >> 24;
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ptr[5] = x >> 16;
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ptr[6] = x >> 8;
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ptr[7] = x;
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#endif
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}
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#endif // BITCOIN_CRYPTO_COMMON_H
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