Bitcoin Core Fuzz Coverage Report for wallet_tx_can_be_bumped

// Copyright (c) 2009-2010 Satoshi Nakamoto

// Copyright (c) 2009-present 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_ARITH_UINT256_H

#define BITCOIN_ARITH_UINT256_H

#include <compare>

#include <cstdint>

#include <cstring>

#include <limits>

#include <stdexcept>

#include <string>

class uint256;

class uint_error : public std::runtime_error {

public:

    explicit uint_error(const std::string& str) : std::runtime_error(str) {}

};

/** Template base class for unsigned big integers. */

template <unsigned int BITS>

class base_uint

{

protected:

    static_assert(BITS / 32 > 0 && BITS % 32 == 0, "Template parameter BITS must be a positive multiple of 32.");

    static constexpr int WIDTH = BITS / 32;

    /** Big integer represented with 32-bit digits, least-significant first. */

    uint32_t pn[WIDTH];

public:

    constexpr base_uint()

    {

        for (int i = 0; i < WIDTH; i++)

            pn[i] = 0;

    }

Unexecuted instantiation: base_uint<256u>::base_uint()

Unexecuted instantiation: base_uint<6144u>::base_uint()

    base_uint(const base_uint& b) = default;

    base_uint& operator=(const base_uint& b) = default;

    constexpr base_uint(uint64_t b)

    {

        pn[0] = (unsigned int)b;

        pn[1] = (unsigned int)(b >> 32);

        for (int i = 2; i < WIDTH; i++)

            pn[i] = 0;

    }

Unexecuted instantiation: base_uint<256u>::base_uint(unsigned long long)

Unexecuted instantiation: base_uint<6144u>::base_uint(unsigned long long)

    base_uint operator~() const

    {

        base_uint ret;

        for (int i = 0; i < WIDTH; i++)

            ret.pn[i] = ~pn[i];

        return ret;

    }

    base_uint operator-() const

    {

        base_uint ret;

        for (int i = 0; i < WIDTH; i++)

            ret.pn[i] = ~pn[i];

        ++ret;

        return ret;

    }

Unexecuted instantiation: base_uint<256u>::operator-() const

Unexecuted instantiation: base_uint<6144u>::operator-() const

    double getdouble() const;

    base_uint& operator=(uint64_t b)

    {

        pn[0] = (unsigned int)b;

        pn[1] = (unsigned int)(b >> 32);

        for (int i = 2; i < WIDTH; i++)

            pn[i] = 0;

        return *this;

    }

Unexecuted instantiation: base_uint<256u>::operator=(unsigned long long)

Unexecuted instantiation: base_uint<6144u>::operator=(unsigned long long)

    base_uint& operator^=(const base_uint& b)

    {

        for (int i = 0; i < WIDTH; i++)

            pn[i] ^= b.pn[i];

        return *this;

    }

    base_uint& operator&=(const base_uint& b)

    {

        for (int i = 0; i < WIDTH; i++)

            pn[i] &= b.pn[i];

        return *this;

    }

    base_uint& operator|=(const base_uint& b)

    {

        for (int i = 0; i < WIDTH; i++)

            pn[i] |= b.pn[i];

        return *this;

    }

    base_uint& operator^=(uint64_t b)

    {

        pn[0] ^= (unsigned int)b;

        pn[1] ^= (unsigned int)(b >> 32);

        return *this;

    }

    base_uint& operator|=(uint64_t b)

    {

        pn[0] |= (unsigned int)b;

        pn[1] |= (unsigned int)(b >> 32);

        return *this;

    }

    base_uint& operator<<=(unsigned int shift);

    base_uint& operator>>=(unsigned int shift);

    base_uint& operator+=(const base_uint& b)

    {

        uint64_t carry = 0;

        for (int i = 0; i < WIDTH; i++)

        {

            uint64_t n = carry + pn[i] + b.pn[i];

            pn[i] = n & 0xffffffff;

            carry = n >> 32;

        }

        return *this;

    }

Unexecuted instantiation: base_uint<256u>::operator+=(base_uint<256u> const&)

Unexecuted instantiation: base_uint<6144u>::operator+=(base_uint<6144u> const&)

    base_uint& operator-=(const base_uint& b)

    {

        *this += -b;

        return *this;

    }

Unexecuted instantiation: base_uint<256u>::operator-=(base_uint<256u> const&)

Unexecuted instantiation: base_uint<6144u>::operator-=(base_uint<6144u> const&)

    base_uint& operator+=(uint64_t b64)

    {

        base_uint b;

        b = b64;

        *this += b;

        return *this;

    }

    base_uint& operator-=(uint64_t b64)

    {

        base_uint b;

        b = b64;

        *this += -b;

        return *this;

    }

    base_uint& operator*=(uint32_t b32);

    base_uint& operator*=(const base_uint& b);

    base_uint& operator/=(const base_uint& b);

    base_uint& operator++()

    {

        // prefix operator

        int i = 0;

        while (i < WIDTH && ++pn[i] == 0)

            i++;

        return *this;

    }

Unexecuted instantiation: base_uint<256u>::operator++()

Unexecuted instantiation: base_uint<6144u>::operator++()

    base_uint operator++(int)

    {

        // postfix operator

        const base_uint ret = *this;

        ++(*this);

        return ret;

    }

    base_uint& operator--()

    {

        // prefix operator

        int i = 0;

        while (i < WIDTH && --pn[i] == std::numeric_limits<uint32_t>::max())

            i++;

        return *this;

    }

    base_uint operator--(int)

    {

        // postfix operator

        const base_uint ret = *this;

        --(*this);

        return ret;

    }

    /** Numeric ordering (unlike \ref base_blob::Compare) */

    int CompareTo(const base_uint& b) const;

    bool EqualTo(uint64_t b) const;

    friend inline base_uint operator+(const base_uint& a, const base_uint& b) { return base_uint(a) += b; }

    friend inline base_uint operator-(const base_uint& a, const base_uint& b) { return base_uint(a) -= b; }

    friend inline base_uint operator*(const base_uint& a, const base_uint& b) { return base_uint(a) *= b; }

    friend inline base_uint operator/(const base_uint& a, const base_uint& b) { return base_uint(a) /= b; }

    friend inline base_uint operator|(const base_uint& a, const base_uint& b) { return base_uint(a) |= b; }

    friend inline base_uint operator&(const base_uint& a, const base_uint& b) { return base_uint(a) &= b; }

    friend inline base_uint operator^(const base_uint& a, const base_uint& b) { return base_uint(a) ^= b; }

    friend inline base_uint operator>>(const base_uint& a, int shift) { return base_uint(a) >>= shift; }

    friend inline base_uint operator<<(const base_uint& a, int shift) { return base_uint(a) <<= shift; }

    friend inline base_uint operator*(const base_uint& a, uint32_t b) { return base_uint(a) *= b; }

    friend inline bool operator==(const base_uint& a, const base_uint& b) { return memcmp(a.pn, b.pn, sizeof(a.pn)) == 0; }

Unexecuted instantiation: operator==(base_uint<256u> const&, base_uint<256u> const&)

Unexecuted instantiation: operator==(base_uint<6144u> const&, base_uint<6144u> const&)

    friend inline std::strong_ordering operator<=>(const base_uint& a, const base_uint& b) { return a.CompareTo(b) <=> 0; }

Unexecuted instantiation: operator<=>(base_uint<256u> const&, base_uint<256u> const&)

Unexecuted instantiation: operator<=>(base_uint<6144u> const&, base_uint<6144u> const&)

    friend inline bool operator==(const base_uint& a, uint64_t b) { return a.EqualTo(b); }

    /** Hex encoding of the number (with the most significant digits first). */

    std::string GetHex() const;

    std::string ToString() const;

    unsigned int size() const

    {

        return sizeof(pn);

    }

    /**

     * Returns the position of the highest bit set plus one, or zero if the

     * value is zero.

     */

    unsigned int bits() const;

    uint64_t GetLow64() const

    {

        static_assert(WIDTH >= 2, "Assertion WIDTH >= 2 failed (WIDTH = BITS / 32). BITS is a template parameter.");

        return pn[0] | (uint64_t)pn[1] << 32;

    }

};

/** 256-bit unsigned big integer. */

class arith_uint256 : public base_uint<256>

{

public:

    constexpr arith_uint256() = default;

    constexpr arith_uint256(const base_uint& b) : base_uint(b) {}

    constexpr arith_uint256(uint64_t b) : base_uint(b) {}

    /**

     * The "compact" format is a representation of a whole

     * number N using an unsigned 32bit number similar to a

     * floating point format.

     * The most significant 8 bits are the unsigned exponent of base 256.

     * This exponent can be thought of as "number of bytes of N".

     * The lower 23 bits are the mantissa.

     * Bit number 24 (0x800000) represents the sign of N.

     * N = (-1^sign) * mantissa * 256^(exponent-3)

     *

     * Satoshi's original implementation used BN_bn2mpi() and BN_mpi2bn().

     * MPI uses the most significant bit of the first byte as sign.

     * Thus 0x1234560000 is compact (0x05123456)

     * and  0xc0de000000 is compact (0x0600c0de)

     *

     * Bitcoin only uses this "compact" format for encoding difficulty

     * targets, which are unsigned 256bit quantities.  Thus, all the

     * complexities of the sign bit and using base 256 are probably an

     * implementation accident.

     */

    arith_uint256& SetCompact(uint32_t nCompact, bool *pfNegative = nullptr, bool *pfOverflow = nullptr);

    uint32_t GetCompact(bool fNegative = false) const;

    friend uint256 ArithToUint256(const arith_uint256 &);

    friend arith_uint256 UintToArith256(const uint256 &);

};

// Keeping the trivially copyable property is beneficial for performance

static_assert(std::is_trivially_copyable_v<arith_uint256>);

uint256 ArithToUint256(const arith_uint256 &);

arith_uint256 UintToArith256(const uint256 &);

extern template class base_uint<256>;

#endif // BITCOIN_ARITH_UINT256_H