diff options
author | Wladimir J. van der Laan <laanwj@gmail.com> | 2014-05-10 15:32:07 +0200 |
---|---|---|
committer | Wladimir J. van der Laan <laanwj@gmail.com> | 2014-05-10 15:32:18 +0200 |
commit | 2653e00b127f53c7d8a8d9f2e5fa3a13cf765129 (patch) | |
tree | 12801fe9b7710e7d3ccc05387dabec8e2694020b | |
parent | ceb0757a3e693e8d9a52ab58e67340e8a3095451 (diff) | |
parent | 7cd0af7cc222d0694ce72e71458aef460698ee2c (diff) |
Merge pull request #4160
7cd0af7 Move bignum.h to test/ (Pieter Wuille)
ccc84e0 Reduce bignum.h now it is only needed for scriptnum_tests (Pieter Wuille)
-rw-r--r-- | src/Makefile.am | 2 | ||||
-rw-r--r-- | src/bignum.h | 530 | ||||
-rw-r--r-- | src/chainparams.h | 1 | ||||
-rw-r--r-- | src/protocol.h | 1 | ||||
-rw-r--r-- | src/test/DoS_tests.cpp | 1 | ||||
-rw-r--r-- | src/test/Makefile.am | 2 | ||||
-rw-r--r-- | src/test/bignum.h | 179 | ||||
-rw-r--r-- | src/test/bignum_tests.cpp | 136 |
8 files changed, 182 insertions, 670 deletions
diff --git a/src/Makefile.am b/src/Makefile.am index 215d0319f9..a49ad58716 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -28,7 +28,7 @@ BITCOIN_CORE_H = \ addrman.h \ alert.h \ allocators.h \ - base58.h bignum.h \ + base58.h \ bloom.h \ chainparams.h \ checkpoints.h \ diff --git a/src/bignum.h b/src/bignum.h deleted file mode 100644 index 6b77462d83..0000000000 --- a/src/bignum.h +++ /dev/null @@ -1,530 +0,0 @@ -// Copyright (c) 2009-2010 Satoshi Nakamoto -// Copyright (c) 2009-2013 The Bitcoin developers -// Distributed under the MIT/X11 software license, see the accompanying -// file COPYING or http://www.opensource.org/licenses/mit-license.php. - -#ifndef BITCOIN_BIGNUM_H -#define BITCOIN_BIGNUM_H - -#include "serialize.h" -#include "uint256.h" -#include "version.h" - -#include <stdexcept> -#include <stdint.h> -#include <vector> - -#include <openssl/bn.h> - -/** Errors thrown by the bignum class */ -class bignum_error : public std::runtime_error -{ -public: - explicit bignum_error(const std::string& str) : std::runtime_error(str) {} -}; - - -/** RAII encapsulated BN_CTX (OpenSSL bignum context) */ -class CAutoBN_CTX -{ -protected: - BN_CTX* pctx; - BN_CTX* operator=(BN_CTX* pnew) { return pctx = pnew; } - -public: - CAutoBN_CTX() - { - pctx = BN_CTX_new(); - if (pctx == NULL) - throw bignum_error("CAutoBN_CTX : BN_CTX_new() returned NULL"); - } - - ~CAutoBN_CTX() - { - if (pctx != NULL) - BN_CTX_free(pctx); - } - - operator BN_CTX*() { return pctx; } - BN_CTX& operator*() { return *pctx; } - BN_CTX** operator&() { return &pctx; } - bool operator!() { return (pctx == NULL); } -}; - - -/** C++ wrapper for BIGNUM (OpenSSL bignum) */ -class CBigNum : public BIGNUM -{ -public: - CBigNum() - { - BN_init(this); - } - - CBigNum(const CBigNum& b) - { - BN_init(this); - if (!BN_copy(this, &b)) - { - BN_clear_free(this); - throw bignum_error("CBigNum::CBigNum(const CBigNum&) : BN_copy failed"); - } - } - - CBigNum& operator=(const CBigNum& b) - { - if (!BN_copy(this, &b)) - throw bignum_error("CBigNum::operator= : BN_copy failed"); - return (*this); - } - - ~CBigNum() - { - BN_clear_free(this); - } - - //CBigNum(char n) is not portable. Use 'signed char' or 'unsigned char'. - CBigNum(signed char n) { BN_init(this); if (n >= 0) setulong(n); else setint64(n); } - CBigNum(short n) { BN_init(this); if (n >= 0) setulong(n); else setint64(n); } - CBigNum(int n) { BN_init(this); if (n >= 0) setulong(n); else setint64(n); } - CBigNum(long n) { BN_init(this); if (n >= 0) setulong(n); else setint64(n); } - CBigNum(long long n) { BN_init(this); setint64(n); } - CBigNum(unsigned char n) { BN_init(this); setulong(n); } - CBigNum(unsigned short n) { BN_init(this); setulong(n); } - CBigNum(unsigned int n) { BN_init(this); setulong(n); } - CBigNum(unsigned long n) { BN_init(this); setulong(n); } - CBigNum(unsigned long long n) { BN_init(this); setuint64(n); } - explicit CBigNum(uint256 n) { BN_init(this); setuint256(n); } - - explicit CBigNum(const std::vector<unsigned char>& vch) - { - BN_init(this); - setvch(vch); - } - - void setulong(unsigned long n) - { - if (!BN_set_word(this, n)) - throw bignum_error("CBigNum conversion from unsigned long : BN_set_word failed"); - } - - unsigned long getulong() const - { - return BN_get_word(this); - } - - unsigned int getuint() const - { - return BN_get_word(this); - } - - int getint() const - { - unsigned long n = BN_get_word(this); - if (!BN_is_negative(this)) - return (n > (unsigned long)std::numeric_limits<int>::max() ? std::numeric_limits<int>::max() : n); - else - return (n > (unsigned long)std::numeric_limits<int>::max() ? std::numeric_limits<int>::min() : -(int)n); - } - - void setint64(int64_t sn) - { - unsigned char pch[sizeof(sn) + 6]; - unsigned char* p = pch + 4; - bool fNegative; - uint64_t n; - - if (sn < (int64_t)0) - { - // Since the minimum signed integer cannot be represented as positive so long as its type is signed, - // and it's not well-defined what happens if you make it unsigned before negating it, - // we instead increment the negative integer by 1, convert it, then increment the (now positive) unsigned integer by 1 to compensate - n = -(sn + 1); - ++n; - fNegative = true; - } else { - n = sn; - fNegative = false; - } - - bool fLeadingZeroes = true; - for (int i = 0; i < 8; i++) - { - unsigned char c = (n >> 56) & 0xff; - n <<= 8; - if (fLeadingZeroes) - { - if (c == 0) - continue; - if (c & 0x80) - *p++ = (fNegative ? 0x80 : 0); - else if (fNegative) - c |= 0x80; - fLeadingZeroes = false; - } - *p++ = c; - } - unsigned int nSize = p - (pch + 4); - pch[0] = (nSize >> 24) & 0xff; - pch[1] = (nSize >> 16) & 0xff; - pch[2] = (nSize >> 8) & 0xff; - pch[3] = (nSize) & 0xff; - BN_mpi2bn(pch, p - pch, this); - } - - void setuint64(uint64_t n) - { - unsigned char pch[sizeof(n) + 6]; - unsigned char* p = pch + 4; - bool fLeadingZeroes = true; - for (int i = 0; i < 8; i++) - { - unsigned char c = (n >> 56) & 0xff; - n <<= 8; - if (fLeadingZeroes) - { - if (c == 0) - continue; - if (c & 0x80) - *p++ = 0; - fLeadingZeroes = false; - } - *p++ = c; - } - unsigned int nSize = p - (pch + 4); - pch[0] = (nSize >> 24) & 0xff; - pch[1] = (nSize >> 16) & 0xff; - pch[2] = (nSize >> 8) & 0xff; - pch[3] = (nSize) & 0xff; - BN_mpi2bn(pch, p - pch, this); - } - - void setuint256(uint256 n) - { - unsigned char pch[sizeof(n) + 6]; - unsigned char* p = pch + 4; - bool fLeadingZeroes = true; - unsigned char* pbegin = (unsigned char*)&n; - unsigned char* psrc = pbegin + sizeof(n); - while (psrc != pbegin) - { - unsigned char c = *(--psrc); - if (fLeadingZeroes) - { - if (c == 0) - continue; - if (c & 0x80) - *p++ = 0; - fLeadingZeroes = false; - } - *p++ = c; - } - unsigned int nSize = p - (pch + 4); - pch[0] = (nSize >> 24) & 0xff; - pch[1] = (nSize >> 16) & 0xff; - pch[2] = (nSize >> 8) & 0xff; - pch[3] = (nSize >> 0) & 0xff; - BN_mpi2bn(pch, p - pch, this); - } - - uint256 getuint256() const - { - unsigned int nSize = BN_bn2mpi(this, NULL); - if (nSize < 4) - return 0; - std::vector<unsigned char> vch(nSize); - BN_bn2mpi(this, &vch[0]); - if (vch.size() > 4) - vch[4] &= 0x7f; - uint256 n = 0; - for (unsigned int i = 0, j = vch.size()-1; i < sizeof(n) && j >= 4; i++, j--) - ((unsigned char*)&n)[i] = vch[j]; - return n; - } - - void setvch(const std::vector<unsigned char>& vch) - { - std::vector<unsigned char> vch2(vch.size() + 4); - unsigned int nSize = vch.size(); - // BIGNUM's byte stream format expects 4 bytes of - // big endian size data info at the front - vch2[0] = (nSize >> 24) & 0xff; - vch2[1] = (nSize >> 16) & 0xff; - vch2[2] = (nSize >> 8) & 0xff; - vch2[3] = (nSize >> 0) & 0xff; - // swap data to big endian - reverse_copy(vch.begin(), vch.end(), vch2.begin() + 4); - BN_mpi2bn(&vch2[0], vch2.size(), this); - } - - std::vector<unsigned char> getvch() const - { - unsigned int nSize = BN_bn2mpi(this, NULL); - if (nSize <= 4) - return std::vector<unsigned char>(); - std::vector<unsigned char> vch(nSize); - BN_bn2mpi(this, &vch[0]); - vch.erase(vch.begin(), vch.begin() + 4); - reverse(vch.begin(), vch.end()); - return vch; - } - - void SetHex(const std::string& str) - { - // skip 0x - const char* psz = str.c_str(); - while (isspace(*psz)) - psz++; - bool fNegative = false; - if (*psz == '-') - { - fNegative = true; - psz++; - } - if (psz[0] == '0' && tolower(psz[1]) == 'x') - psz += 2; - while (isspace(*psz)) - psz++; - - // hex string to bignum - *this = 0; - int n; - while ((n = HexDigit(*psz)) != -1) - { - *this <<= 4; - *this += n; - ++psz; - } - if (fNegative) - *this = 0 - *this; - } - - std::string ToString(int nBase=10) const - { - CAutoBN_CTX pctx; - CBigNum bnBase = nBase; - CBigNum bn0 = 0; - std::string str; - CBigNum bn = *this; - BN_set_negative(&bn, false); - CBigNum dv; - CBigNum rem; - if (BN_cmp(&bn, &bn0) == 0) - return "0"; - while (BN_cmp(&bn, &bn0) > 0) - { - if (!BN_div(&dv, &rem, &bn, &bnBase, pctx)) - throw bignum_error("CBigNum::ToString() : BN_div failed"); - bn = dv; - unsigned int c = rem.getulong(); - str += "0123456789abcdef"[c]; - } - if (BN_is_negative(this)) - str += "-"; - reverse(str.begin(), str.end()); - return str; - } - - std::string GetHex() const - { - return ToString(16); - } - - unsigned int GetSerializeSize(int nType=0, int nVersion=PROTOCOL_VERSION) const - { - return ::GetSerializeSize(getvch(), nType, nVersion); - } - - template<typename Stream> - void Serialize(Stream& s, int nType=0, int nVersion=PROTOCOL_VERSION) const - { - ::Serialize(s, getvch(), nType, nVersion); - } - - template<typename Stream> - void Unserialize(Stream& s, int nType=0, int nVersion=PROTOCOL_VERSION) - { - std::vector<unsigned char> vch; - ::Unserialize(s, vch, nType, nVersion); - setvch(vch); - } - - - bool operator!() const - { - return BN_is_zero(this); - } - - CBigNum& operator+=(const CBigNum& b) - { - if (!BN_add(this, this, &b)) - throw bignum_error("CBigNum::operator+= : BN_add failed"); - return *this; - } - - CBigNum& operator-=(const CBigNum& b) - { - *this = *this - b; - return *this; - } - - CBigNum& operator*=(const CBigNum& b) - { - CAutoBN_CTX pctx; - if (!BN_mul(this, this, &b, pctx)) - throw bignum_error("CBigNum::operator*= : BN_mul failed"); - return *this; - } - - CBigNum& operator/=(const CBigNum& b) - { - *this = *this / b; - return *this; - } - - CBigNum& operator%=(const CBigNum& b) - { - *this = *this % b; - return *this; - } - - CBigNum& operator<<=(unsigned int shift) - { - if (!BN_lshift(this, this, shift)) - throw bignum_error("CBigNum:operator<<= : BN_lshift failed"); - return *this; - } - - CBigNum& operator>>=(unsigned int shift) - { - // Note: BN_rshift segfaults on 64-bit if 2^shift is greater than the number - // if built on ubuntu 9.04 or 9.10, probably depends on version of OpenSSL - CBigNum a = 1; - a <<= shift; - if (BN_cmp(&a, this) > 0) - { - *this = 0; - return *this; - } - - if (!BN_rshift(this, this, shift)) - throw bignum_error("CBigNum:operator>>= : BN_rshift failed"); - return *this; - } - - - CBigNum& operator++() - { - // prefix operator - if (!BN_add(this, this, BN_value_one())) - throw bignum_error("CBigNum::operator++ : BN_add failed"); - return *this; - } - - const CBigNum operator++(int) - { - // postfix operator - const CBigNum ret = *this; - ++(*this); - return ret; - } - - CBigNum& operator--() - { - // prefix operator - CBigNum r; - if (!BN_sub(&r, this, BN_value_one())) - throw bignum_error("CBigNum::operator-- : BN_sub failed"); - *this = r; - return *this; - } - - const CBigNum operator--(int) - { - // postfix operator - const CBigNum ret = *this; - --(*this); - return ret; - } - - - friend inline const CBigNum operator-(const CBigNum& a, const CBigNum& b); - friend inline const CBigNum operator/(const CBigNum& a, const CBigNum& b); - friend inline const CBigNum operator%(const CBigNum& a, const CBigNum& b); -}; - - - -inline const CBigNum operator+(const CBigNum& a, const CBigNum& b) -{ - CBigNum r; - if (!BN_add(&r, &a, &b)) - throw bignum_error("CBigNum::operator+ : BN_add failed"); - return r; -} - -inline const CBigNum operator-(const CBigNum& a, const CBigNum& b) -{ - CBigNum r; - if (!BN_sub(&r, &a, &b)) - throw bignum_error("CBigNum::operator- : BN_sub failed"); - return r; -} - -inline const CBigNum operator-(const CBigNum& a) -{ - CBigNum r(a); - BN_set_negative(&r, !BN_is_negative(&r)); - return r; -} - -inline const CBigNum operator*(const CBigNum& a, const CBigNum& b) -{ - CAutoBN_CTX pctx; - CBigNum r; - if (!BN_mul(&r, &a, &b, pctx)) - throw bignum_error("CBigNum::operator* : BN_mul failed"); - return r; -} - -inline const CBigNum operator/(const CBigNum& a, const CBigNum& b) -{ - CAutoBN_CTX pctx; - CBigNum r; - if (!BN_div(&r, NULL, &a, &b, pctx)) - throw bignum_error("CBigNum::operator/ : BN_div failed"); - return r; -} - -inline const CBigNum operator%(const CBigNum& a, const CBigNum& b) -{ - CAutoBN_CTX pctx; - CBigNum r; - if (!BN_mod(&r, &a, &b, pctx)) - throw bignum_error("CBigNum::operator% : BN_div failed"); - return r; -} - -inline const CBigNum operator<<(const CBigNum& a, unsigned int shift) -{ - CBigNum r; - if (!BN_lshift(&r, &a, shift)) - throw bignum_error("CBigNum:operator<< : BN_lshift failed"); - return r; -} - -inline const CBigNum operator>>(const CBigNum& a, unsigned int shift) -{ - CBigNum r = a; - r >>= shift; - return r; -} - -inline bool operator==(const CBigNum& a, const CBigNum& b) { return (BN_cmp(&a, &b) == 0); } -inline bool operator!=(const CBigNum& a, const CBigNum& b) { return (BN_cmp(&a, &b) != 0); } -inline bool operator<=(const CBigNum& a, const CBigNum& b) { return (BN_cmp(&a, &b) <= 0); } -inline bool operator>=(const CBigNum& a, const CBigNum& b) { return (BN_cmp(&a, &b) >= 0); } -inline bool operator<(const CBigNum& a, const CBigNum& b) { return (BN_cmp(&a, &b) < 0); } -inline bool operator>(const CBigNum& a, const CBigNum& b) { return (BN_cmp(&a, &b) > 0); } - -#endif diff --git a/src/chainparams.h b/src/chainparams.h index f3f24efd99..5600b904cc 100644 --- a/src/chainparams.h +++ b/src/chainparams.h @@ -6,7 +6,6 @@ #ifndef BITCOIN_CHAIN_PARAMS_H #define BITCOIN_CHAIN_PARAMS_H -#include "bignum.h" #include "uint256.h" #include <vector> diff --git a/src/protocol.h b/src/protocol.h index 86e08ddcfa..e6f105fe5c 100644 --- a/src/protocol.h +++ b/src/protocol.h @@ -14,6 +14,7 @@ #include "netbase.h" #include "serialize.h" #include "uint256.h" +#include "version.h" #include <stdint.h> #include <string> diff --git a/src/test/DoS_tests.cpp b/src/test/DoS_tests.cpp index 897fb87e46..fb06fb3435 100644 --- a/src/test/DoS_tests.cpp +++ b/src/test/DoS_tests.cpp @@ -8,7 +8,6 @@ -#include "bignum.h" #include "keystore.h" #include "main.h" #include "net.h" diff --git a/src/test/Makefile.am b/src/test/Makefile.am index e12f4904f1..cde3a31e2f 100644 --- a/src/test/Makefile.am +++ b/src/test/Makefile.am @@ -32,12 +32,12 @@ endif test_bitcoin_LDADD += $(BDB_LIBS) test_bitcoin_SOURCES = \ + bignum.h \ alert_tests.cpp \ allocator_tests.cpp \ base32_tests.cpp \ base58_tests.cpp \ base64_tests.cpp \ - bignum_tests.cpp \ bloom_tests.cpp \ canonical_tests.cpp \ checkblock_tests.cpp \ diff --git a/src/test/bignum.h b/src/test/bignum.h new file mode 100644 index 0000000000..b57800f372 --- /dev/null +++ b/src/test/bignum.h @@ -0,0 +1,179 @@ +// Copyright (c) 2009-2010 Satoshi Nakamoto +// Copyright (c) 2009-2013 The Bitcoin developers +// Distributed under the MIT/X11 software license, see the accompanying +// file COPYING or http://www.opensource.org/licenses/mit-license.php. + +#ifndef BITCOIN_BIGNUM_H +#define BITCOIN_BIGNUM_H + +#include <algorithm> +#include <limits> +#include <stdexcept> +#include <stdint.h> +#include <vector> + +#include <openssl/bn.h> + +class bignum_error : public std::runtime_error +{ +public: + explicit bignum_error(const std::string& str) : std::runtime_error(str) {} +}; + + +/** C++ wrapper for BIGNUM (OpenSSL bignum) */ +class CBigNum : public BIGNUM +{ +public: + CBigNum() + { + BN_init(this); + } + + CBigNum(const CBigNum& b) + { + BN_init(this); + if (!BN_copy(this, &b)) + { + BN_clear_free(this); + throw bignum_error("CBigNum::CBigNum(const CBigNum&) : BN_copy failed"); + } + } + + CBigNum& operator=(const CBigNum& b) + { + if (!BN_copy(this, &b)) + throw bignum_error("CBigNum::operator= : BN_copy failed"); + return (*this); + } + + ~CBigNum() + { + BN_clear_free(this); + } + + CBigNum(long long n) { BN_init(this); setint64(n); } + + explicit CBigNum(const std::vector<unsigned char>& vch) + { + BN_init(this); + setvch(vch); + } + + int getint() const + { + unsigned long n = BN_get_word(this); + if (!BN_is_negative(this)) + return (n > (unsigned long)std::numeric_limits<int>::max() ? std::numeric_limits<int>::max() : n); + else + return (n > (unsigned long)std::numeric_limits<int>::max() ? std::numeric_limits<int>::min() : -(int)n); + } + + void setint64(int64_t sn) + { + unsigned char pch[sizeof(sn) + 6]; + unsigned char* p = pch + 4; + bool fNegative; + uint64_t n; + + if (sn < (int64_t)0) + { + // Since the minimum signed integer cannot be represented as positive so long as its type is signed, + // and it's not well-defined what happens if you make it unsigned before negating it, + // we instead increment the negative integer by 1, convert it, then increment the (now positive) unsigned integer by 1 to compensate + n = -(sn + 1); + ++n; + fNegative = true; + } else { + n = sn; + fNegative = false; + } + + bool fLeadingZeroes = true; + for (int i = 0; i < 8; i++) + { + unsigned char c = (n >> 56) & 0xff; + n <<= 8; + if (fLeadingZeroes) + { + if (c == 0) + continue; + if (c & 0x80) + *p++ = (fNegative ? 0x80 : 0); + else if (fNegative) + c |= 0x80; + fLeadingZeroes = false; + } + *p++ = c; + } + unsigned int nSize = p - (pch + 4); + pch[0] = (nSize >> 24) & 0xff; + pch[1] = (nSize >> 16) & 0xff; + pch[2] = (nSize >> 8) & 0xff; + pch[3] = (nSize) & 0xff; + BN_mpi2bn(pch, p - pch, this); + } + + void setvch(const std::vector<unsigned char>& vch) + { + std::vector<unsigned char> vch2(vch.size() + 4); + unsigned int nSize = vch.size(); + // BIGNUM's byte stream format expects 4 bytes of + // big endian size data info at the front + vch2[0] = (nSize >> 24) & 0xff; + vch2[1] = (nSize >> 16) & 0xff; + vch2[2] = (nSize >> 8) & 0xff; + vch2[3] = (nSize >> 0) & 0xff; + // swap data to big endian + reverse_copy(vch.begin(), vch.end(), vch2.begin() + 4); + BN_mpi2bn(&vch2[0], vch2.size(), this); + } + + std::vector<unsigned char> getvch() const + { + unsigned int nSize = BN_bn2mpi(this, NULL); + if (nSize <= 4) + return std::vector<unsigned char>(); + std::vector<unsigned char> vch(nSize); + BN_bn2mpi(this, &vch[0]); + vch.erase(vch.begin(), vch.begin() + 4); + reverse(vch.begin(), vch.end()); + return vch; + } + + friend inline const CBigNum operator-(const CBigNum& a, const CBigNum& b); +}; + + + +inline const CBigNum operator+(const CBigNum& a, const CBigNum& b) +{ + CBigNum r; + if (!BN_add(&r, &a, &b)) + throw bignum_error("CBigNum::operator+ : BN_add failed"); + return r; +} + +inline const CBigNum operator-(const CBigNum& a, const CBigNum& b) +{ + CBigNum r; + if (!BN_sub(&r, &a, &b)) + throw bignum_error("CBigNum::operator- : BN_sub failed"); + return r; +} + +inline const CBigNum operator-(const CBigNum& a) +{ + CBigNum r(a); + BN_set_negative(&r, !BN_is_negative(&r)); + return r; +} + +inline bool operator==(const CBigNum& a, const CBigNum& b) { return (BN_cmp(&a, &b) == 0); } +inline bool operator!=(const CBigNum& a, const CBigNum& b) { return (BN_cmp(&a, &b) != 0); } +inline bool operator<=(const CBigNum& a, const CBigNum& b) { return (BN_cmp(&a, &b) <= 0); } +inline bool operator>=(const CBigNum& a, const CBigNum& b) { return (BN_cmp(&a, &b) >= 0); } +inline bool operator<(const CBigNum& a, const CBigNum& b) { return (BN_cmp(&a, &b) < 0); } +inline bool operator>(const CBigNum& a, const CBigNum& b) { return (BN_cmp(&a, &b) > 0); } + +#endif diff --git a/src/test/bignum_tests.cpp b/src/test/bignum_tests.cpp deleted file mode 100644 index 01967c7684..0000000000 --- a/src/test/bignum_tests.cpp +++ /dev/null @@ -1,136 +0,0 @@ -// Copyright (c) 2012-2014 The Bitcoin Core developers -// Distributed under the MIT/X11 software license, see the accompanying -// file COPYING or http://www.opensource.org/licenses/mit-license.php. - -#include "bignum.h" - -#include <limits> -#include <stdint.h> - -#include <boost/test/unit_test.hpp> - -BOOST_AUTO_TEST_SUITE(bignum_tests) - -// Unfortunately there's no standard way of preventing a function from being -// inlined, so we define a macro for it. -// -// You should use it like this: -// NOINLINE void function() {...} -#if defined(__GNUC__) -// This also works and will be defined for any compiler implementing GCC -// extensions, such as Clang and ICC. -#define NOINLINE __attribute__((noinline)) -#elif defined(_MSC_VER) -#define NOINLINE __declspec(noinline) -#else -// We give out a warning because it impacts the correctness of one bignum test. -#warning You should define NOINLINE for your compiler. -#define NOINLINE -#endif - -// For the following test case, it is useful to use additional tools. -// -// The simplest one to use is the compiler flag -ftrapv, which detects integer -// overflows and similar errors. However, due to optimizations and compilers -// taking advantage of undefined behavior sometimes it may not actually detect -// anything. -// -// You can also use compiler-based stack protection to possibly detect possible -// stack buffer overruns. -// -// For more accurate diagnostics, you can use an undefined arithmetic operation -// detector such as the clang's undefined behaviour checker. -// See also: http://clang.llvm.org/docs/UsersManual.html#controlling-code-generation -// -// It might also be useful to use Google's AddressSanitizer to detect -// stack buffer overruns, which valgrind can't currently detect. - -// Let's force this code not to be inlined, in order to actually -// test a generic version of the function. This increases the chance -// that -ftrapv will detect overflows. -NOINLINE void mysetint64(CBigNum& num, int64_t n) -{ - num.setint64(n); -} - -// For each number, we do 2 tests: one with inline code, then we reset the -// value to 0, then the second one with a non-inlined function. -BOOST_AUTO_TEST_CASE(bignum_setint64) -{ - int64_t n; - - { - n = 0; - CBigNum num(n); - BOOST_CHECK(num.ToString() == "0"); - num.setulong(0); - BOOST_CHECK(num.ToString() == "0"); - mysetint64(num, n); - BOOST_CHECK(num.ToString() == "0"); - } - { - n = 1; - CBigNum num(n); - BOOST_CHECK(num.ToString() == "1"); - num.setulong(0); - BOOST_CHECK(num.ToString() == "0"); - mysetint64(num, n); - BOOST_CHECK(num.ToString() == "1"); - } - { - n = -1; - CBigNum num(n); - BOOST_CHECK(num.ToString() == "-1"); - num.setulong(0); - BOOST_CHECK(num.ToString() == "0"); - mysetint64(num, n); - BOOST_CHECK(num.ToString() == "-1"); - } - { - n = 5; - CBigNum num(n); - BOOST_CHECK(num.ToString() == "5"); - num.setulong(0); - BOOST_CHECK(num.ToString() == "0"); - mysetint64(num, n); - BOOST_CHECK(num.ToString() == "5"); - } - { - n = -5; - CBigNum num(n); - BOOST_CHECK(num.ToString() == "-5"); - num.setulong(0); - BOOST_CHECK(num.ToString() == "0"); - mysetint64(num, n); - BOOST_CHECK(num.ToString() == "-5"); - } - { - n = std::numeric_limits<int64_t>::min(); - CBigNum num(n); - BOOST_CHECK(num.ToString() == "-9223372036854775808"); - num.setulong(0); - BOOST_CHECK(num.ToString() == "0"); - mysetint64(num, n); - BOOST_CHECK(num.ToString() == "-9223372036854775808"); - } - { - n = std::numeric_limits<int64_t>::max(); - CBigNum num(n); - BOOST_CHECK(num.ToString() == "9223372036854775807"); - num.setulong(0); - BOOST_CHECK(num.ToString() == "0"); - mysetint64(num, n); - BOOST_CHECK(num.ToString() == "9223372036854775807"); - } -} - - -BOOST_AUTO_TEST_CASE(bignum_SetHex) -{ - std::string hexStr = "deecf97fd890808b9cc0f1b6a3e7a60b400f52710e6ad075b1340755bfa58cc9"; - CBigNum num; - num.SetHex(hexStr); - BOOST_CHECK_EQUAL(num.GetHex(), hexStr); -} - -BOOST_AUTO_TEST_SUITE_END() |