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//===-- EDToken.cpp - LLVM Enhanced Disassembler --------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the Enhanced Disassembler library's token class. The
// token is responsible for vending information about the token, such as its
// type and logical value.
//
//===----------------------------------------------------------------------===//
#include "EDToken.h"
#include "EDDisassembler.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/MC/MCParser/MCAsmLexer.h"
#include "llvm/MC/MCParser/MCParsedAsmOperand.h"
using namespace llvm;
EDToken::EDToken(StringRef str,
enum tokenType type,
uint64_t localType,
EDDisassembler &disassembler) :
Disassembler(disassembler),
Str(str),
Type(type),
LocalType(localType),
OperandID(-1) {
}
EDToken::~EDToken() {
}
void EDToken::makeLiteral(bool sign, uint64_t absoluteValue) {
Type = kTokenLiteral;
LiteralSign = sign;
LiteralAbsoluteValue = absoluteValue;
}
void EDToken::makeRegister(unsigned registerID) {
Type = kTokenRegister;
RegisterID = registerID;
}
void EDToken::setOperandID(int operandID) {
OperandID = operandID;
}
enum EDToken::tokenType EDToken::type() const {
return Type;
}
uint64_t EDToken::localType() const {
return LocalType;
}
StringRef EDToken::string() const {
return Str;
}
int EDToken::operandID() const {
return OperandID;
}
int EDToken::literalSign() const {
if (Type != kTokenLiteral)
return -1;
return (LiteralSign ? 1 : 0);
}
int EDToken::literalAbsoluteValue(uint64_t &value) const {
if (Type != kTokenLiteral)
return -1;
value = LiteralAbsoluteValue;
return 0;
}
int EDToken::registerID(unsigned ®isterID) const {
if (Type != kTokenRegister)
return -1;
registerID = RegisterID;
return 0;
}
int EDToken::tokenize(std::vector<EDToken*> &tokens,
std::string &str,
const signed char *operandOrder,
EDDisassembler &disassembler) {
SmallVector<MCParsedAsmOperand*, 5> parsedOperands;
SmallVector<AsmToken, 10> asmTokens;
if (disassembler.parseInst(parsedOperands, asmTokens, str))
{
for (unsigned i = 0, e = parsedOperands.size(); i != e; ++i)
delete parsedOperands[i];
return -1;
}
SmallVectorImpl<MCParsedAsmOperand*>::iterator operandIterator;
unsigned int operandIndex;
SmallVectorImpl<AsmToken>::iterator tokenIterator;
operandIterator = parsedOperands.begin();
operandIndex = 0;
bool readOpcode = false;
const char *wsPointer = asmTokens.begin()->getLoc().getPointer();
for (tokenIterator = asmTokens.begin();
tokenIterator != asmTokens.end();
++tokenIterator) {
SMLoc tokenLoc = tokenIterator->getLoc();
const char *tokenPointer = tokenLoc.getPointer();
if (tokenPointer > wsPointer) {
unsigned long wsLength = tokenPointer - wsPointer;
EDToken *whitespaceToken = new EDToken(StringRef(wsPointer, wsLength),
EDToken::kTokenWhitespace,
0,
disassembler);
tokens.push_back(whitespaceToken);
}
wsPointer = tokenPointer + tokenIterator->getString().size();
while (operandIterator != parsedOperands.end() &&
tokenLoc.getPointer() >
(*operandIterator)->getEndLoc().getPointer()) {
++operandIterator;
++operandIndex;
}
EDToken *token;
switch (tokenIterator->getKind()) {
case AsmToken::Identifier:
if (!readOpcode) {
token = new EDToken(tokenIterator->getString(),
EDToken::kTokenOpcode,
(uint64_t)tokenIterator->getKind(),
disassembler);
readOpcode = true;
break;
}
// any identifier that isn't an opcode is mere punctuation; so we fall
// through
default:
token = new EDToken(tokenIterator->getString(),
EDToken::kTokenPunctuation,
(uint64_t)tokenIterator->getKind(),
disassembler);
break;
case AsmToken::Integer:
{
token = new EDToken(tokenIterator->getString(),
EDToken::kTokenLiteral,
(uint64_t)tokenIterator->getKind(),
disassembler);
int64_t intVal = tokenIterator->getIntVal();
if (intVal < 0)
token->makeLiteral(true, -intVal);
else
token->makeLiteral(false, intVal);
break;
}
case AsmToken::Register:
{
token = new EDToken(tokenIterator->getString(),
EDToken::kTokenLiteral,
(uint64_t)tokenIterator->getKind(),
disassembler);
token->makeRegister((unsigned)tokenIterator->getRegVal());
break;
}
}
if (operandIterator != parsedOperands.end() &&
tokenLoc.getPointer() >=
(*operandIterator)->getStartLoc().getPointer()) {
/// operandIndex == 0 means the operand is the instruction (which the
/// AsmParser treats as an operand but edis does not). We therefore skip
/// operandIndex == 0 and subtract 1 from all other operand indices.
if (operandIndex > 0)
token->setOperandID(operandOrder[operandIndex - 1]);
}
tokens.push_back(token);
}
// Free any parsed operands.
for (unsigned i = 0, e = parsedOperands.size(); i != e; ++i)
delete parsedOperands[i];
return 0;
}
int EDToken::getString(const char*& buf) {
if (PermStr.length() == 0) {
PermStr = Str.str();
}
buf = PermStr.c_str();
return 0;
}
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