6 #ifndef BITCOIN_ARITH_UINT256_H 7 #define BITCOIN_ARITH_UINT256_H 19 explicit uint_error(
const std::string &str) :
std::runtime_error(str) {}
25 static constexpr
int WIDTH = BITS / 32;
31 BITS / 32 > 0 && BITS % 32 == 0,
32 "Template parameter BITS must be a positive multiple of 32.");
34 for (
int i = 0; i < WIDTH; i++) {
41 BITS / 32 > 0 && BITS % 32 == 0,
42 "Template parameter BITS must be a positive multiple of 32.");
44 for (
int i = 0; i < WIDTH; i++) {
50 for (
int i = 0; i < WIDTH; i++) {
58 BITS / 32 > 0 && BITS % 32 == 0,
59 "Template parameter BITS must be a positive multiple of 32.");
61 pn[0] = (
unsigned int)b;
62 pn[1] = (
unsigned int)(b >> 32);
63 for (
int i = 2; i < WIDTH; i++) {
68 explicit base_uint(
const std::string &str);
72 for (
int i = 0; i < WIDTH; i++) {
80 for (
int i = 0; i < WIDTH; i++) {
87 double getdouble()
const;
90 pn[0] = (
unsigned int)b;
91 pn[1] = (
unsigned int)(b >> 32);
92 for (
int i = 2; i < WIDTH; i++) {
99 for (
int i = 0; i < WIDTH; i++) {
106 for (
int i = 0; i < WIDTH; i++) {
113 for (
int i = 0; i < WIDTH; i++) {
120 pn[0] ^= (
unsigned int)b;
121 pn[1] ^= (
unsigned int)(b >> 32);
126 pn[0] |= (
unsigned int)b;
127 pn[1] |= (
unsigned int)(b >> 32);
131 base_uint &operator<<=(
unsigned int shift);
132 base_uint &operator>>=(
unsigned int shift);
136 for (
int i = 0; i < WIDTH; i++) {
137 uint64_t n = carry + pn[i] + b.
pn[i];
138 pn[i] = n & 0xffffffff;
170 while (i < WIDTH && ++pn[i] == 0) {
186 while (i < WIDTH && --pn[i] == std::numeric_limits<uint32_t>::max()) {
200 bool EqualTo(uint64_t b)
const;
240 return memcmp(a.
pn, b.
pn,
sizeof(a.
pn)) == 0;
243 return memcmp(a.
pn, b.
pn,
sizeof(a.
pn)) != 0;
264 std::string GetHex()
const;
265 void SetHex(
const char *psz);
266 void SetHex(
const std::string &str);
269 unsigned int size()
const {
return sizeof(pn); }
275 unsigned int bits()
const;
278 static_assert(WIDTH >= 2,
"Assertion WIDTH >= 2 failed (WIDTH = BITS / " 279 "32). BITS is a template parameter.");
280 return pn[0] | uint64_t(pn[1]) << 32;
310 arith_uint256 &SetCompact(uint32_t nCompact,
bool *pfNegative =
nullptr,
311 bool *pfOverflow =
nullptr);
312 uint32_t GetCompact(
bool fNegative =
false)
const;
321 #endif // BITCOIN_ARITH_UINT256_H bool EqualTo(uint64_t b) const
base_uint & operator=(const base_uint &b)
friend const base_uint operator^(const base_uint &a, const base_uint &b)
base_uint & operator &=(const base_uint &b)
arith_uint256(const std::string &str)
const base_uint operator~() const
friend const base_uint operator*(const base_uint &a, uint32_t b)
base_uint & operator|=(uint64_t b)
friend const base_uint operator &(const base_uint &a, const base_uint &b)
friend bool operator!=(const base_uint &a, uint64_t b)
base_uint & operator+=(const base_uint &b)
friend bool operator<=(const base_uint &a, const base_uint &b)
base_uint & operator|=(const base_uint &b)
base_uint & operator-=(uint64_t b64)
friend bool operator>(const base_uint &a, const base_uint &b)
Template base class for unsigned big integers.
friend const base_uint operator-(const base_uint &a, const base_uint &b)
base_uint & operator+=(uint64_t b64)
friend const base_uint operator/(const base_uint &a, const base_uint &b)
std::string ToString(const T &t)
Locale-independent version of std::to_string.
base_uint & operator-=(const base_uint &b)
friend bool operator==(const base_uint &a, const base_uint &b)
friend const base_uint operator+(const base_uint &a, const base_uint &b)
friend bool operator<(const base_uint &a, const base_uint &b)
uint256 ArithToUint256(const arith_uint256 &)
base_uint(const base_uint &b)
friend const base_uint operator*(const base_uint &a, const base_uint &b)
int CompareTo(const base_uint &b) const
uint_error(const std::string &str)
base_uint & operator^=(uint64_t b)
256-bit unsigned big integer.
friend bool operator!=(const base_uint &a, const base_uint &b)
uint64_t GetLow64() const
friend const base_uint operator|(const base_uint &a, const base_uint &b)
const base_uint operator-() const
arith_uint256(uint64_t b)
base_uint & operator=(uint64_t b)
const base_uint operator--(int)
const base_uint operator++(int)
friend const base_uint operator<<(const base_uint &a, int shift)
friend bool operator>=(const base_uint &a, const base_uint &b)
arith_uint256(const base_uint< 256 > &b)
arith_uint256 UintToArith256(const uint256 &)
unsigned int size() const
friend bool operator==(const base_uint &a, uint64_t b)
friend const base_uint operator>>(const base_uint &a, int shift)
base_uint & operator^=(const base_uint &b)