From 27bff74e39c4c2951a709114e0d565568a0554fa Mon Sep 17 00:00:00 2001 From: Cory Fields Date: Wed, 26 Mar 2014 15:55:35 -0400 Subject: [PATCH] script: switch to CScriptNum usage for scripts --- src/script.cpp | 44 +++++++++++++++++-------------------------- src/script.h | 51 +++++++++++--------------------------------------- 2 files changed, 28 insertions(+), 67 deletions(-) diff --git a/src/script.cpp b/src/script.cpp index 810ba16d2..25180e0bb 100644 --- a/src/script.cpp +++ b/src/script.cpp @@ -25,22 +25,13 @@ typedef vector valtype; static const valtype vchFalse(0); static const valtype vchZero(0); static const valtype vchTrue(1, 1); -static const CBigNum bnZero(0); -static const CBigNum bnOne(1); -static const CBigNum bnFalse(0); -static const CBigNum bnTrue(1); -static const size_t nMaxNumSize = 4; +static const CScriptNum bnZero(0); +static const CScriptNum bnOne(1); +static const CScriptNum bnFalse(0); +static const CScriptNum bnTrue(1); bool CheckSig(vector vchSig, const vector &vchPubKey, const CScript &scriptCode, const CTransaction& txTo, unsigned int nIn, int nHashType, int flags); -CBigNum CastToBigNum(const valtype& vch) -{ - if (vch.size() > nMaxNumSize) - throw runtime_error("CastToBigNum() : overflow"); - // Get rid of extra leading zeros - return CBigNum(CBigNum(vch).getvch()); -} - bool CastToBool(const valtype& vch) { for (unsigned int i = 0; i < vch.size(); i++) @@ -306,7 +297,6 @@ bool IsCanonicalSignature(const valtype &vchSig, unsigned int flags) { bool EvalScript(vector >& stack, const CScript& script, const CTransaction& txTo, unsigned int nIn, unsigned int flags, int nHashType) { - CAutoBN_CTX pctx; CScript::const_iterator pc = script.begin(); CScript::const_iterator pend = script.end(); CScript::const_iterator pbegincodehash = script.begin(); @@ -380,7 +370,7 @@ bool EvalScript(vector >& stack, const CScript& script, co case OP_16: { // ( -- value) - CBigNum bn((int)opcode - (int)(OP_1 - 1)); + CScriptNum bn((int)opcode - (int)(OP_1 - 1)); stack.push_back(bn.getvch()); } break; @@ -556,7 +546,7 @@ bool EvalScript(vector >& stack, const CScript& script, co case OP_DEPTH: { // -- stacksize - CBigNum bn(stack.size()); + CScriptNum bn(stack.size()); stack.push_back(bn.getvch()); } break; @@ -606,7 +596,7 @@ bool EvalScript(vector >& stack, const CScript& script, co // (xn ... x2 x1 x0 n - ... x2 x1 x0 xn) if (stack.size() < 2) return false; - int n = CastToBigNum(stacktop(-1)).getint(); + int n = CScriptNum(stacktop(-1)).getint(); popstack(stack); if (n < 0 || n >= (int)stack.size()) return false; @@ -654,7 +644,7 @@ bool EvalScript(vector >& stack, const CScript& script, co // (in -- in size) if (stack.size() < 1) return false; - CBigNum bn(stacktop(-1).size()); + CScriptNum bn(stacktop(-1).size()); stack.push_back(bn.getvch()); } break; @@ -705,7 +695,7 @@ bool EvalScript(vector >& stack, const CScript& script, co // (in -- out) if (stack.size() < 1) return false; - CBigNum bn = CastToBigNum(stacktop(-1)); + CScriptNum bn(stacktop(-1)); switch (opcode) { case OP_1ADD: bn += bnOne; break; @@ -738,9 +728,9 @@ bool EvalScript(vector >& stack, const CScript& script, co // (x1 x2 -- out) if (stack.size() < 2) return false; - CBigNum bn1 = CastToBigNum(stacktop(-2)); - CBigNum bn2 = CastToBigNum(stacktop(-1)); - CBigNum bn; + CScriptNum bn1(stacktop(-2)); + CScriptNum bn2(stacktop(-1)); + CScriptNum bn(0); switch (opcode) { case OP_ADD: @@ -783,9 +773,9 @@ bool EvalScript(vector >& stack, const CScript& script, co // (x min max -- out) if (stack.size() < 3) return false; - CBigNum bn1 = CastToBigNum(stacktop(-3)); - CBigNum bn2 = CastToBigNum(stacktop(-2)); - CBigNum bn3 = CastToBigNum(stacktop(-1)); + CScriptNum bn1(stacktop(-3)); + CScriptNum bn2(stacktop(-2)); + CScriptNum bn3(stacktop(-1)); bool fValue = (bn2 <= bn1 && bn1 < bn3); popstack(stack); popstack(stack); @@ -882,7 +872,7 @@ bool EvalScript(vector >& stack, const CScript& script, co if ((int)stack.size() < i) return false; - int nKeysCount = CastToBigNum(stacktop(-i)).getint(); + int nKeysCount = CScriptNum(stacktop(-i)).getint(); if (nKeysCount < 0 || nKeysCount > 20) return false; nOpCount += nKeysCount; @@ -893,7 +883,7 @@ bool EvalScript(vector >& stack, const CScript& script, co if ((int)stack.size() < i) return false; - int nSigsCount = CastToBigNum(stacktop(-i)).getint(); + int nSigsCount = CScriptNum(stacktop(-i)).getint(); if (nSigsCount < 0 || nSigsCount > nKeysCount) return false; int isig = ++i; diff --git a/src/script.h b/src/script.h index 9bc06b2e0..7781ea61c 100644 --- a/src/script.h +++ b/src/script.h @@ -374,7 +374,7 @@ const char* GetOpName(opcodetype opcode); inline std::string ValueString(const std::vector& vch) { if (vch.size() <= 4) - return strprintf("%d", CBigNum(vch).getint()); + return strprintf("%d", CScriptNum(vch).getint()); else return HexStr(vch); } @@ -410,26 +410,10 @@ protected: } else { - CBigNum bn(n); - *this << bn.getvch(); + *this << CScriptNum::serialize(n); } return *this; } - - CScript& push_uint64(uint64_t n) - { - if (n >= 1 && n <= 16) - { - push_back(n + (OP_1 - 1)); - } - else - { - CBigNum bn(n); - *this << bn.getvch(); - } - return *this; - } - public: CScript() { } CScript(const CScript& b) : std::vector(b.begin(), b.end()) { } @@ -452,35 +436,16 @@ public: } - //explicit CScript(char b) is not portable. Use 'signed char' or 'unsigned char'. - explicit CScript(signed char b) { operator<<(b); } - explicit CScript(short b) { operator<<(b); } - explicit CScript(int b) { operator<<(b); } - explicit CScript(long b) { operator<<(b); } - explicit CScript(long long b) { operator<<(b); } - explicit CScript(unsigned char b) { operator<<(b); } - explicit CScript(unsigned int b) { operator<<(b); } - explicit CScript(unsigned short b) { operator<<(b); } - explicit CScript(unsigned long b) { operator<<(b); } - explicit CScript(unsigned long long b) { operator<<(b); } + CScript(int64_t b) { operator<<(b); } explicit CScript(opcodetype b) { operator<<(b); } explicit CScript(const uint256& b) { operator<<(b); } + explicit CScript(const CScriptNum& b) { operator<<(b); } explicit CScript(const CBigNum& b) { operator<<(b); } explicit CScript(const std::vector& b) { operator<<(b); } - //CScript& operator<<(char b) is not portable. Use 'signed char' or 'unsigned char'. - CScript& operator<<(signed char b) { return push_int64(b); } - CScript& operator<<(short b) { return push_int64(b); } - CScript& operator<<(int b) { return push_int64(b); } - CScript& operator<<(long b) { return push_int64(b); } - CScript& operator<<(long long b) { return push_int64(b); } - CScript& operator<<(unsigned char b) { return push_uint64(b); } - CScript& operator<<(unsigned int b) { return push_uint64(b); } - CScript& operator<<(unsigned short b) { return push_uint64(b); } - CScript& operator<<(unsigned long b) { return push_uint64(b); } - CScript& operator<<(unsigned long long b) { return push_uint64(b); } + CScript& operator<<(int64_t b) { return push_int64(b); } CScript& operator<<(opcodetype opcode) { @@ -518,6 +483,12 @@ public: return *this; } + CScript& operator<<(const CScriptNum& b) + { + *this << b.getvch(); + return *this; + } + CScript& operator<<(const std::vector& b) { if (b.size() < OP_PUSHDATA1)