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[MOVEONLY] Turn CScript::GetOp2 into a function and move to cpp

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This commit is contained in:
Pieter Wuille
2018-04-04 09:14:13 -07:00
parent 6a7456ad60
commit 54a5a21158
3 changed files with 57 additions and 54 deletions
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52
src/script/script.cpp
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@@ -280,3 +280,55 @@ bool CScript::HasValidOps() const
}
return true;
}
bool GetScriptOp(CScriptBase::const_iterator& pc, CScriptBase::const_iterator end, opcodetype& opcodeRet, std::vector<unsigned char>* pvchRet)
{
opcodeRet = OP_INVALIDOPCODE;
if (pvchRet)
pvchRet->clear();
if (pc >= end)
return false;
// Read instruction
if (end - pc < 1)
return false;
unsigned int opcode = *pc++;
// Immediate operand
if (opcode <= OP_PUSHDATA4)
{
unsigned int nSize = 0;
if (opcode < OP_PUSHDATA1)
{
nSize = opcode;
}
else if (opcode == OP_PUSHDATA1)
{
if (end - pc < 1)
return false;
nSize = *pc++;
}
else if (opcode == OP_PUSHDATA2)
{
if (end - pc < 2)
return false;
nSize = ReadLE16(&pc[0]);
pc += 2;
}
else if (opcode == OP_PUSHDATA4)
{
if (end - pc < 4)
return false;
nSize = ReadLE32(&pc[0]);
pc += 4;
}
if (end - pc < 0 || (unsigned int)(end - pc) < nSize)
return false;
if (pvchRet)
pvchRet->assign(pc, pc + nSize);
pc += nSize;
}
opcodeRet = static_cast<opcodetype>(opcode);
return true;
}