// Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2014 The Bitcoin developers
-// Distributed under the MIT/X11 software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+// Copyright (c) 2009-2014 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or https://www.opensource.org/licenses/mit-license.php .
#include "uint256.h"
#include <string.h>
template <unsigned int BITS>
-base_uint<BITS>::base_uint(const std::string& str)
+base_blob<BITS>::base_blob(const std::vector<unsigned char>& vch)
{
- SetHex(str);
+ assert(vch.size() == sizeof(data));
+ memcpy(data, &vch[0], sizeof(data));
}
template <unsigned int BITS>
-base_uint<BITS>::base_uint(const std::vector<unsigned char>& vch)
+std::string base_blob<BITS>::GetHex() const
{
- if (vch.size() != sizeof(pn))
- throw uint_error("Converting vector of wrong size to base_uint");
- memcpy(pn, &vch[0], sizeof(pn));
+ char psz[sizeof(data) * 2 + 1];
+ for (unsigned int i = 0; i < sizeof(data); i++)
+ sprintf(psz + i * 2, "%02x", data[sizeof(data) - i - 1]);
+ return std::string(psz, psz + sizeof(data) * 2);
}
template <unsigned int BITS>
-base_uint<BITS>& base_uint<BITS>::operator<<=(unsigned int shift)
+void base_blob<BITS>::SetHex(const char* psz)
{
- base_uint<BITS> a(*this);
- for (int i = 0; i < WIDTH; i++)
- pn[i] = 0;
- int k = shift / 32;
- shift = shift % 32;
- for (int i = 0; i < WIDTH; i++) {
- if (i + k + 1 < WIDTH && shift != 0)
- pn[i + k + 1] |= (a.pn[i] >> (32 - shift));
- if (i + k < WIDTH)
- pn[i + k] |= (a.pn[i] << shift);
- }
- return *this;
-}
-
-template <unsigned int BITS>
-base_uint<BITS>& base_uint<BITS>::operator>>=(unsigned int shift)
-{
- base_uint<BITS> a(*this);
- for (int i = 0; i < WIDTH; i++)
- pn[i] = 0;
- int k = shift / 32;
- shift = shift % 32;
- for (int i = 0; i < WIDTH; i++) {
- if (i - k - 1 >= 0 && shift != 0)
- pn[i - k - 1] |= (a.pn[i] << (32 - shift));
- if (i - k >= 0)
- pn[i - k] |= (a.pn[i] >> shift);
- }
- return *this;
-}
-
-template <unsigned int BITS>
-base_uint<BITS>& base_uint<BITS>::operator*=(uint32_t b32)
-{
- uint64_t carry = 0;
- for (int i = 0; i < WIDTH; i++) {
- uint64_t n = carry + (uint64_t)b32 * pn[i];
- pn[i] = n & 0xffffffff;
- carry = n >> 32;
- }
- return *this;
-}
-
-template <unsigned int BITS>
-base_uint<BITS>& base_uint<BITS>::operator*=(const base_uint& b)
-{
- base_uint<BITS> a = *this;
- *this = 0;
- for (int j = 0; j < WIDTH; j++) {
- uint64_t carry = 0;
- for (int i = 0; i + j < WIDTH; i++) {
- uint64_t n = carry + pn[i + j] + (uint64_t)a.pn[j] * b.pn[i];
- pn[i + j] = n & 0xffffffff;
- carry = n >> 32;
- }
- }
- return *this;
-}
-
-template <unsigned int BITS>
-base_uint<BITS>& base_uint<BITS>::operator/=(const base_uint& b)
-{
- base_uint<BITS> div = b; // make a copy, so we can shift.
- base_uint<BITS> num = *this; // make a copy, so we can subtract.
- *this = 0; // the quotient.
- int num_bits = num.bits();
- int div_bits = div.bits();
- if (div_bits == 0)
- throw uint_error("Division by zero");
- if (div_bits > num_bits) // the result is certainly 0.
- return *this;
- int shift = num_bits - div_bits;
- div <<= shift; // shift so that div and nun align.
- while (shift >= 0) {
- if (num >= div) {
- num -= div;
- pn[shift / 32] |= (1 << (shift & 31)); // set a bit of the result.
- }
- div >>= 1; // shift back.
- shift--;
- }
- // num now contains the remainder of the division.
- return *this;
-}
-
-template <unsigned int BITS>
-int base_uint<BITS>::CompareTo(const base_uint<BITS>& b) const
-{
- for (int i = WIDTH - 1; i >= 0; i--) {
- if (pn[i] < b.pn[i])
- return -1;
- if (pn[i] > b.pn[i])
- return 1;
- }
- return 0;
-}
-
-template <unsigned int BITS>
-bool base_uint<BITS>::EqualTo(uint64_t b) const
-{
- for (int i = WIDTH - 1; i >= 2; i--) {
- if (pn[i])
- return false;
- }
- if (pn[1] != (b >> 32))
- return false;
- if (pn[0] != (b & 0xfffffffful))
- return false;
- return true;
-}
-
-template <unsigned int BITS>
-double base_uint<BITS>::getdouble() const
-{
- double ret = 0.0;
- double fact = 1.0;
- for (int i = 0; i < WIDTH; i++) {
- ret += fact * pn[i];
- fact *= 4294967296.0;
- }
- return ret;
-}
-
-template <unsigned int BITS>
-std::string base_uint<BITS>::GetHex() const
-{
- char psz[sizeof(pn) * 2 + 1];
- for (unsigned int i = 0; i < sizeof(pn); i++)
- sprintf(psz + i * 2, "%02x", ((unsigned char*)pn)[sizeof(pn) - i - 1]);
- return std::string(psz, psz + sizeof(pn) * 2);
-}
-
-template <unsigned int BITS>
-void base_uint<BITS>::SetHex(const char* psz)
-{
- memset(pn, 0, sizeof(pn));
+ memset(data, 0, sizeof(data));
// skip leading spaces
while (isspace(*psz))
while (::HexDigit(*psz) != -1)
psz++;
psz--;
- unsigned char* p1 = (unsigned char*)pn;
- unsigned char* pend = p1 + WIDTH * 4;
+ unsigned char* p1 = (unsigned char*)data;
+ unsigned char* pend = p1 + WIDTH;
while (psz >= pbegin && p1 < pend) {
*p1 = ::HexDigit(*psz--);
if (psz >= pbegin) {
}
template <unsigned int BITS>
-void base_uint<BITS>::SetHex(const std::string& str)
+void base_blob<BITS>::SetHex(const std::string& str)
{
SetHex(str.c_str());
}
template <unsigned int BITS>
-std::string base_uint<BITS>::ToString() const
+std::string base_blob<BITS>::ToString() const
{
return (GetHex());
}
-template <unsigned int BITS>
-unsigned int base_uint<BITS>::bits() const
-{
- for (int pos = WIDTH - 1; pos >= 0; pos--) {
- if (pn[pos]) {
- for (int bits = 31; bits > 0; bits--) {
- if (pn[pos] & 1 << bits)
- return 32 * pos + bits + 1;
- }
- return 32 * pos + 1;
- }
- }
- return 0;
-}
-
-// Explicit instantiations for base_uint<160>
-template base_uint<160>::base_uint(const std::string&);
-template base_uint<160>::base_uint(const std::vector<unsigned char>&);
-template base_uint<160>& base_uint<160>::operator<<=(unsigned int);
-template base_uint<160>& base_uint<160>::operator>>=(unsigned int);
-template base_uint<160>& base_uint<160>::operator*=(uint32_t b32);
-template base_uint<160>& base_uint<160>::operator*=(const base_uint<160>& b);
-template base_uint<160>& base_uint<160>::operator/=(const base_uint<160>& b);
-template int base_uint<160>::CompareTo(const base_uint<160>&) const;
-template bool base_uint<160>::EqualTo(uint64_t) const;
-template double base_uint<160>::getdouble() const;
-template std::string base_uint<160>::GetHex() const;
-template std::string base_uint<160>::ToString() const;
-template void base_uint<160>::SetHex(const char*);
-template void base_uint<160>::SetHex(const std::string&);
-template unsigned int base_uint<160>::bits() const;
+// Explicit instantiations for base_blob<160>
+template base_blob<160>::base_blob(const std::vector<unsigned char>&);
+template std::string base_blob<160>::GetHex() const;
+template std::string base_blob<160>::ToString() const;
+template void base_blob<160>::SetHex(const char*);
+template void base_blob<160>::SetHex(const std::string&);
-// Explicit instantiations for base_uint<256>
-template base_uint<256>::base_uint(const std::string&);
-template base_uint<256>::base_uint(const std::vector<unsigned char>&);
-template base_uint<256>& base_uint<256>::operator<<=(unsigned int);
-template base_uint<256>& base_uint<256>::operator>>=(unsigned int);
-template base_uint<256>& base_uint<256>::operator*=(uint32_t b32);
-template base_uint<256>& base_uint<256>::operator*=(const base_uint<256>& b);
-template base_uint<256>& base_uint<256>::operator/=(const base_uint<256>& b);
-template int base_uint<256>::CompareTo(const base_uint<256>&) const;
-template bool base_uint<256>::EqualTo(uint64_t) const;
-template double base_uint<256>::getdouble() const;
-template std::string base_uint<256>::GetHex() const;
-template std::string base_uint<256>::ToString() const;
-template void base_uint<256>::SetHex(const char*);
-template void base_uint<256>::SetHex(const std::string&);
-template unsigned int base_uint<256>::bits() const;
-
-// This implementation directly uses shifts instead of going
-// through an intermediate MPI representation.
-uint256& uint256::SetCompact(uint32_t nCompact, bool* pfNegative, bool* pfOverflow)
-{
- int nSize = nCompact >> 24;
- uint32_t nWord = nCompact & 0x007fffff;
- if (nSize <= 3) {
- nWord >>= 8 * (3 - nSize);
- *this = nWord;
- } else {
- *this = nWord;
- *this <<= 8 * (nSize - 3);
- }
- if (pfNegative)
- *pfNegative = nWord != 0 && (nCompact & 0x00800000) != 0;
- if (pfOverflow)
- *pfOverflow = nWord != 0 && ((nSize > 34) ||
- (nWord > 0xff && nSize > 33) ||
- (nWord > 0xffff && nSize > 32));
- return *this;
-}
-
-uint32_t uint256::GetCompact(bool fNegative) const
-{
- int nSize = (bits() + 7) / 8;
- uint32_t nCompact = 0;
- if (nSize <= 3) {
- nCompact = GetLow64() << 8 * (3 - nSize);
- } else {
- uint256 bn = *this >> 8 * (nSize - 3);
- nCompact = bn.GetLow64();
- }
- // The 0x00800000 bit denotes the sign.
- // Thus, if it is already set, divide the mantissa by 256 and increase the exponent.
- if (nCompact & 0x00800000) {
- nCompact >>= 8;
- nSize++;
- }
- assert((nCompact & ~0x007fffff) == 0);
- assert(nSize < 256);
- nCompact |= nSize << 24;
- nCompact |= (fNegative && (nCompact & 0x007fffff) ? 0x00800000 : 0);
- return nCompact;
-}
+// Explicit instantiations for base_blob<256>
+template base_blob<256>::base_blob(const std::vector<unsigned char>&);
+template std::string base_blob<256>::GetHex() const;
+template std::string base_blob<256>::ToString() const;
+template void base_blob<256>::SetHex(const char*);
+template void base_blob<256>::SetHex(const std::string&);
static void inline HashMix(uint32_t& a, uint32_t& b, uint32_t& c)
{
uint64_t uint256::GetHash(const uint256& salt) const
{
uint32_t a, b, c;
- a = b = c = 0xdeadbeef + (WIDTH << 2);
+ const uint32_t *pn = (const uint32_t*)data;
+ const uint32_t *salt_pn = (const uint32_t*)salt.data;
+ a = b = c = 0xdeadbeef + WIDTH;
- a += pn[0] ^ salt.pn[0];
- b += pn[1] ^ salt.pn[1];
- c += pn[2] ^ salt.pn[2];
+ a += pn[0] ^ salt_pn[0];
+ b += pn[1] ^ salt_pn[1];
+ c += pn[2] ^ salt_pn[2];
HashMix(a, b, c);
- a += pn[3] ^ salt.pn[3];
- b += pn[4] ^ salt.pn[4];
- c += pn[5] ^ salt.pn[5];
+ a += pn[3] ^ salt_pn[3];
+ b += pn[4] ^ salt_pn[4];
+ c += pn[5] ^ salt_pn[5];
HashMix(a, b, c);
- a += pn[6] ^ salt.pn[6];
- b += pn[7] ^ salt.pn[7];
+ a += pn[6] ^ salt_pn[6];
+ b += pn[7] ^ salt_pn[7];
HashFinal(a, b, c);
return ((((uint64_t)b) << 32) | c);
projects / VerusCoin.git / blobdiff