#ifndef BITCOIN_UINT256_H
#define BITCOIN_UINT256_H
-#include <limits.h>
-#include <stdio.h>
-#include <string.h>
+#include <limits>
#include <string>
#include <vector>
-#include <stdint.h>
-
-inline int Testuint256AdHoc(std::vector<std::string> vArg);
-
+#include <iomanip>
+#include <sstream>
/** Base class without constructors for uint256 and uint160.
uint32_t pn[WIDTH];
public:
+ const base_uint max()
+ {
+ base_uint ret;
+ for (int i = 0; i < WIDTH; i++)
+ ret.pn[i] = std::numeric_limits<uint32_t>::max();
+ return ret;
+ }
+
bool operator!() const
{
for (int i = 0; i < WIDTH; i++)
std::string 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);
+ std::stringstream ss;
+ size_t pn_size = sizeof(pn) / sizeof(pn[0]);
+ for (size_t i = 1; i <= pn_size; i++)
+ ss << std::setfill('0') << std::setw(8) << std::setbase(16) << pn[pn_size-i];
+ return ss.str();
}
void SetHex(const char* psz)
return (GetHex());
}
- unsigned char* begin()
+ unsigned char* begin() const
{
return (unsigned char*)&pn[0];
}
- unsigned char* end()
+ unsigned char* end() const
{
return (unsigned char*)&pn[WIDTH];
}
return std::vector<unsigned char>(begin(), end());
}
- size_t size()
+ size_t size() const
{
return sizeof(pn);
}
return sizeof(pn);
}
+ unsigned int 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;
+ }
+
template<typename Stream>
void Serialize(Stream& s, int nType, int nVersion) const
{
friend class uint160;
friend class uint256;
- friend inline int Testuint256AdHoc(std::vector<std::string> vArg);
};
typedef base_uint<160> base_uint160;
public:
typedef base_uint160 basetype;
- uint160()
- {
- for (int i = 0; i < WIDTH; i++)
- pn[i] = 0;
- }
-
- uint160(const basetype& b)
- {
- for (int i = 0; i < WIDTH; i++)
- pn[i] = b.pn[i];
- }
-
- uint160& operator=(const basetype& b)
- {
- for (int i = 0; i < WIDTH; i++)
- pn[i] = b.pn[i];
- return *this;
- }
-
- uint160(uint64_t b)
- {
- pn[0] = (uint32_t)b;
- pn[1] = (uint32_t)(b >> 32);
- for (int i = 2; i < WIDTH; i++)
- pn[i] = 0;
- }
-
- uint160& operator=(uint64_t b)
- {
- pn[0] = (uint32_t)b;
- pn[1] = (uint32_t)(b >> 32);
- for (int i = 2; i < WIDTH; i++)
- pn[i] = 0;
- return *this;
- }
-
- explicit uint160(const std::string& str)
- {
- SetHex(str);
- }
-
- explicit uint160(const std::vector<unsigned char>& vch)
- {
- if (vch.size() == sizeof(pn))
- memcpy(pn, &vch[0], sizeof(pn));
- else
- *this = 0;
- }
+ uint160();
+ uint160(const basetype& b);
+ uint160& operator=(const basetype& b);
+ uint160(uint64_t b);
+ uint160& operator=(uint64_t b);
+ explicit uint160(const std::string& str);
+ explicit uint160(const std::vector<unsigned char>& vch);
};
inline bool operator==(const uint160& a, uint64_t b) { return (base_uint160)a == b; }
// uint256
//
+
+/** Errors thrown by the uint256 class */
+class uint256_error : public std::exception
+{
+public:
+ explicit uint256_error(const std::string& error_message) : what_(error_message) {}
+
+ virtual const char* what() const throw () { return what_.c_str(); }
+ virtual ~uint256_error() throw () {}
+private:
+ std::string what_;
+};
+
/** 256-bit unsigned integer */
class uint256 : public base_uint256
{
public:
typedef base_uint256 basetype;
- uint256()
- {
- for (int i = 0; i < WIDTH; i++)
- pn[i] = 0;
- }
-
- uint256(const basetype& b)
- {
- for (int i = 0; i < WIDTH; i++)
- pn[i] = b.pn[i];
- }
-
- uint256& operator=(const basetype& b)
- {
- for (int i = 0; i < WIDTH; i++)
- pn[i] = b.pn[i];
- return *this;
- }
-
- uint256(uint64_t b)
- {
- pn[0] = (uint32_t)b;
- pn[1] = (uint32_t)(b >> 32);
- for (int i = 2; i < WIDTH; i++)
- pn[i] = 0;
- }
-
- uint256& operator=(uint64_t b)
- {
- pn[0] = (uint32_t)b;
- pn[1] = (uint32_t)(b >> 32);
- for (int i = 2; i < WIDTH; i++)
- pn[i] = 0;
- return *this;
- }
-
- explicit uint256(const std::string& str)
- {
- SetHex(str);
- }
-
- explicit uint256(const std::vector<unsigned char>& vch)
- {
- if (vch.size() == sizeof(pn))
- memcpy(pn, &vch[0], sizeof(pn));
- else
- *this = 0;
- }
+ uint256();
+ uint256(const basetype& b);
+ uint256& operator=(const basetype& b);
+ uint256(uint64_t b);
+ uint256& operator=(uint64_t b);
+ uint256& SetCompact(uint32_t nCompact, bool *pfNegative = NULL, bool *pfOverflow = NULL);
+ uint32_t GetCompact(bool fNegative = false) const;
+ uint256& operator*=(uint32_t b32);
+ uint256& operator*=(const uint256& b);
+ uint256& operator/=(const uint256& b);
+ explicit uint256(const std::string& str);
+ explicit uint256(const std::vector<unsigned char>& vch);
};
inline bool operator==(const uint256& a, uint64_t b) { return (base_uint256)a == b; }
inline const uint256 operator&(const base_uint256& a, const base_uint256& b) { return uint256(a) &= b; }
inline const uint256 operator|(const base_uint256& a, const base_uint256& b) { return uint256(a) |= b; }
inline const uint256 operator+(const base_uint256& a, const base_uint256& b) { return uint256(a) += b; }
+inline const uint256 operator*(const base_uint256& a, const base_uint256& b) { return uint256(a) *= b; }
+inline const uint256 operator/(const base_uint256& a, const base_uint256& b) { return uint256(a) /= b; }
inline const uint256 operator-(const base_uint256& a, const base_uint256& b) { return uint256(a) -= b; }
inline bool operator<(const base_uint256& a, const uint256& b) { return (base_uint256)a < (base_uint256)b; }
inline const uint256 operator&(const base_uint256& a, const uint256& b) { return (base_uint256)a & (base_uint256)b; }
inline const uint256 operator|(const base_uint256& a, const uint256& b) { return (base_uint256)a | (base_uint256)b; }
inline const uint256 operator+(const base_uint256& a, const uint256& b) { return (base_uint256)a + (base_uint256)b; }
+inline const uint256 operator*(const base_uint256& a, const uint256& b) { return (base_uint256)a * (base_uint256)b; }
+inline const uint256 operator/(const base_uint256& a, const uint256& b) { return (base_uint256)a / (base_uint256)b; }
inline const uint256 operator-(const base_uint256& a, const uint256& b) { return (base_uint256)a - (base_uint256)b; }
inline bool operator<(const uint256& a, const base_uint256& b) { return (base_uint256)a < (base_uint256)b; }
inline const uint256 operator+(const uint256& a, const uint256& b) { return (base_uint256)a + (base_uint256)b; }
inline const uint256 operator-(const uint256& a, const uint256& b) { return (base_uint256)a - (base_uint256)b; }
+uint256 GetRandHash();
+
#endif
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