git / moonbite-core / src/crypto/common.h · raw

// Copyright (c) 2014-2018 The Bitcoin Core developers// Distributed under the MIT software license, see the accompanying// file COPYING or http://www.opensource.org/licenses/mit-license.php.#ifndef BITCOIN_CRYPTO_COMMON_H#define BITCOIN_CRYPTO_COMMON_H#if defined(HAVE_CONFIG_H)#include <config/bitcoin-config.h>#endif#include <stdint.h>#include <string.h>#include <compat/endian.h>uint16_t static inline ReadLE16(const unsigned char* ptr){    uint16_t x;    memcpy((char*)&x, ptr, 2);    return le16toh(x);}uint32_t static inline ReadLE32(const unsigned char* ptr){    uint32_t x;    memcpy((char*)&x, ptr, 4);    return le32toh(x);}uint64_t static inline ReadLE64(const unsigned char* ptr){    uint64_t x;    memcpy((char*)&x, ptr, 8);    return le64toh(x);}void static inline WriteLE16(unsigned char* ptr, uint16_t x){    uint16_t v = htole16(x);    memcpy(ptr, (char*)&v, 2);}void static inline WriteLE32(unsigned char* ptr, uint32_t x){    uint32_t v = htole32(x);    memcpy(ptr, (char*)&v, 4);}void static inline WriteLE64(unsigned char* ptr, uint64_t x){    uint64_t v = htole64(x);    memcpy(ptr, (char*)&v, 8);}uint16_t static inline ReadBE16(const unsigned char* ptr){    uint16_t x;    memcpy((char*)&x, ptr, 2);    return be16toh(x);}uint32_t static inline ReadBE32(const unsigned char* ptr){    uint32_t x;    memcpy((char*)&x, ptr, 4);    return be32toh(x);}uint64_t static inline ReadBE64(const unsigned char* ptr){    uint64_t x;    memcpy((char*)&x, ptr, 8);    return be64toh(x);}void static inline WriteBE32(unsigned char* ptr, uint32_t x){    uint32_t v = htobe32(x);    memcpy(ptr, (char*)&v, 4);}void static inline WriteBE64(unsigned char* ptr, uint64_t x){    uint64_t v = htobe64(x);    memcpy(ptr, (char*)&v, 8);}/** Return the smallest number n such that (x >> n) == 0 (or 64 if the highest bit in x is set. */uint64_t static inline CountBits(uint64_t x){#if HAVE_BUILTIN_CLZL    if (sizeof(unsigned long) >= sizeof(uint64_t)) {        return x ? 8 * sizeof(unsigned long) - __builtin_clzl(x) : 0;    }#endif#if HAVE_BUILTIN_CLZLL    if (sizeof(unsigned long long) >= sizeof(uint64_t)) {        return x ? 8 * sizeof(unsigned long long) - __builtin_clzll(x) : 0;    }#endif    int ret = 0;    while (x) {        x >>= 1;        ++ret;    }    return ret;}#endif // BITCOIN_CRYPTO_COMMON_H