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slghpatexpress.cc
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/* ###
* IP: GHIDRA
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "slghpatexpress.hh"
#include "sleighbase.hh"
namespace ghidra {
int4 TokenPattern::resolveTokens(const TokenPattern &tok1,const TokenPattern &tok2)
{ // Use the token lists to decide how the two patterns
// should be aligned relative to each other
// return how much -tok2- needs to be shifted
// and set the resulting tokenlist and ellipses
bool reversedirection = false;
leftellipsis = false;
rightellipsis = false;
int4 ressa = 0;
int4 minsize = tok1.toklist.size() < tok2.toklist.size() ? tok1.toklist.size() : tok2.toklist.size();
if (minsize == 0) {
// Check if pattern doesn't care about tokens
if ((tok1.toklist.size()==0)&&(tok1.leftellipsis==false)&&(tok1.rightellipsis==false)) {
toklist = tok2.toklist;
leftellipsis = tok2.leftellipsis;
rightellipsis = tok2.rightellipsis;
return 0;
}
else if ((tok2.toklist.size()==0)&&(tok2.leftellipsis==false)&&(tok2.rightellipsis==false)) {
toklist = tok1.toklist;
leftellipsis = tok1.leftellipsis;
rightellipsis = tok1.rightellipsis;
return 0;
}
// If one of the ellipses is true then the pattern
// still cares about tokens even though none are
// specified
}
if (tok1.leftellipsis) {
reversedirection = true;
if (tok2.rightellipsis)
throw SleighError("Right/left ellipsis");
else if (tok2.leftellipsis)
leftellipsis = true;
else if (tok1.toklist.size() != minsize) {
ostringstream msg;
msg << "Mismatched pattern sizes -- " << dec << tok1.toklist.size()
<< " != "
<< dec << minsize;
throw SleighError(msg.str());
}
else if (tok1.toklist.size()==tok2.toklist.size())
throw SleighError("Pattern size cannot vary (missing '...'?)");
}
else if (tok1.rightellipsis) {
if (tok2.leftellipsis)
throw SleighError("Left/right ellipsis");
else if (tok2.rightellipsis)
rightellipsis = true;
else if (tok1.toklist.size() != minsize) {
ostringstream msg;
msg << "Mismatched pattern sizes -- " << dec << tok1.toklist.size()
<< " != "
<< dec << minsize;
throw SleighError(msg.str());
}
else if (tok1.toklist.size()==tok2.toklist.size())
throw SleighError("Pattern size cannot vary (missing '...'?)");
}
else {
if (tok2.leftellipsis) {
reversedirection = true;
if (tok2.toklist.size() != minsize) {
ostringstream msg;
msg << "Mismatched pattern sizes -- " << dec << tok2.toklist.size()
<< " != "
<< dec << minsize;
throw SleighError(msg.str());
}
else if (tok1.toklist.size()==tok2.toklist.size())
throw SleighError("Pattern size cannot vary (missing '...'?)");
}
else if (tok2.rightellipsis) {
if (tok2.toklist.size() != minsize) {
ostringstream msg;
msg << "Mismatched pattern sizes -- " << dec << tok2.toklist.size()
<< " != "
<< dec << minsize;
throw SleighError(msg.str());
}
else if (tok1.toklist.size()==tok2.toklist.size())
throw SleighError("Pattern size cannot vary (missing '...'?)");
}
else {
if (tok2.toklist.size() != tok1.toklist.size()) {
ostringstream msg;
msg << "Mismatched pattern sizes -- " << dec << tok2.toklist.size()
<< " != "
<< dec << tok1.toklist.size();
throw SleighError(msg.str());
}
}
}
if (reversedirection) {
for(int4 i=0;i<minsize;++i)
if (tok1.toklist[tok1.toklist.size()-1-i] != tok2.toklist[tok2.toklist.size()-1-i]) {
ostringstream msg;
msg << "Mismatched tokens when combining patterns -- "
<< dec << tok1.toklist[tok1.toklist.size()-1-i]
<< " != "
<< dec << tok2.toklist[tok2.toklist.size()-1-i];
throw SleighError(msg.str());
}
if (tok1.toklist.size() <= tok2.toklist.size())
for(int4 i=minsize;i<tok2.toklist.size();++i)
ressa += tok2.toklist[tok2.toklist.size()-1-i]->getSize();
else
for(int4 i=minsize;i<tok1.toklist.size();++i)
ressa += tok1.toklist[tok1.toklist.size()-1-i]->getSize();
if (tok1.toklist.size() < tok2.toklist.size())
ressa = -ressa;
}
else {
for(int4 i=0;i<minsize;++i)
if (tok1.toklist[i] != tok2.toklist[i]) {
ostringstream msg;
msg << "Mismatched tokens when combining patterns -- "
<< dec << tok1.toklist[i]
<< " != "
<< dec << tok2.toklist[i];
throw SleighError(msg.str());
}
}
// Save the results into -this-
if (tok1.toklist.size() <= tok2.toklist.size())
toklist = tok2.toklist;
else
toklist = tok1.toklist;
return ressa;
}
PatternBlock *TokenPattern::buildSingle(int4 startbit,int4 endbit,uintm byteval)
{ // Create a mask/value pattern within a single word
// The field is given by the bitrange [startbit,endbit]
// bit 0 is the MOST sig bit of the word
// use the least sig bits of byteval to fill in
// the field's value
uintm mask;
int4 offset = 0;
int4 size = endbit-startbit+1;
while(startbit >= 8) {
offset += 1;
startbit -= 8;
endbit -= 8;
}
mask = (~((uintm)0)) << (sizeof(uintm)*8-size);
byteval = (byteval << (sizeof(uintm)*8-size))& mask;
mask >>= startbit;
byteval >>= startbit;
return new PatternBlock(offset,mask,byteval);
}
PatternBlock *TokenPattern::buildBigBlock(int4 size,int4 bitstart,int4 bitend,intb value)
{ // Build pattern block given a bigendian contiguous
// range of bits and a value for those bits
int4 tmpstart,startbit,endbit;
PatternBlock *tmpblock,*block;
startbit = 8*size - 1 - bitend;
endbit = 8*size - 1 - bitstart;
block = (PatternBlock *)0;
while(endbit >= startbit) {
tmpstart = endbit - (endbit & 7);
if (tmpstart < startbit)
tmpstart = startbit;
tmpblock = buildSingle(tmpstart,endbit,(uintm)value);
if (block == (PatternBlock *)0)
block = tmpblock;
else {
PatternBlock *newblock = block->intersect(tmpblock);
delete block;
delete tmpblock;
block = newblock;
}
value >>= (endbit-tmpstart+1);
endbit = tmpstart - 1;
}
return block;
}
PatternBlock *TokenPattern::buildLittleBlock(int4 size,int4 bitstart,int4 bitend,intb value)
{ // Build pattern block given a littleendian contiguous
// range of bits and a value for those bits
PatternBlock *tmpblock,*block;
int4 startbit,endbit;
block = (PatternBlock *)0;
// we need to convert a bit range specified on a little endian token where the
// bit indices label the least sig bit as 0 into a bit range on big endian bytes
// where the indices label the most sig bit as 0. The reversal due to
// little->big endian cancels part of the reversal due to least->most sig bit
// labelling, but not on the lower 3 bits. So the transform becomes
// leave the upper bits the same, but transform the lower 3-bit value x into 7-x.
startbit = (bitstart/8) * 8; // Get the high-order portion of little/LSB labelling
endbit = (bitend/8) * 8;
bitend = bitend % 8; // Get the low-order portion of little/LSB labelling
bitstart = bitstart % 8;
if (startbit == endbit) {
startbit += 7 - bitend;
endbit += 7 - bitstart;
block = buildSingle(startbit,endbit,(uintm)value);
}
else {
block = buildSingle(startbit,startbit+(7-bitstart),(uintm)value);
value >>= (8-bitstart); // Cut off bits we just encoded
startbit += 8;
while(startbit != endbit) {
tmpblock = buildSingle(startbit,startbit+7,(uintm)value);
if (block == (PatternBlock *)0)
block = tmpblock;
else {
PatternBlock *newblock = block->intersect(tmpblock);
delete block;
delete tmpblock;
block = newblock;
}
value >>= 8;
startbit += 8;
}
tmpblock = buildSingle(endbit+(7-bitend),endbit+7,(uintm)value);
if (block == (PatternBlock *)0)
block = tmpblock;
else {
PatternBlock *newblock = block->intersect(tmpblock);
delete block;
delete tmpblock;
block = newblock;
}
}
return block;
}
TokenPattern::TokenPattern(void)
{
leftellipsis = false;
rightellipsis = false;
pattern = new InstructionPattern(true);
}
TokenPattern::TokenPattern(bool tf)
{ // TRUE or FALSE pattern
leftellipsis = false;
rightellipsis = false;
pattern = new InstructionPattern(tf);
}
TokenPattern::TokenPattern(Token *tok)
{
leftellipsis = false;
rightellipsis = false;
pattern = new InstructionPattern(true);
toklist.push_back(tok);
}
TokenPattern::TokenPattern(Token *tok,intb value,int4 bitstart,int4 bitend)
{ // A basic instruction pattern
toklist.push_back(tok);
leftellipsis = false;
rightellipsis = false;
PatternBlock *block;
if (tok->isBigEndian())
block = buildBigBlock(tok->getSize(),bitstart,bitend,value);
else
block = buildLittleBlock(tok->getSize(),bitstart,bitend,value);
pattern = new InstructionPattern(block);
}
TokenPattern::TokenPattern(intb value,int4 startbit,int4 endbit)
{ // A basic context pattern
leftellipsis = false;
rightellipsis = false;
PatternBlock *block;
int4 size = (endbit/8) + 1;
block = buildBigBlock(size,size*8-1-endbit,size*8-1-startbit,value);
pattern = new ContextPattern(block);
}
TokenPattern::TokenPattern(const TokenPattern &tokpat)
{
pattern = tokpat.pattern->simplifyClone();
toklist = tokpat.toklist;
leftellipsis = tokpat.leftellipsis;
rightellipsis = tokpat.rightellipsis;
}
const TokenPattern &TokenPattern::operator=(const TokenPattern &tokpat)
{
delete pattern;
pattern = tokpat.pattern->simplifyClone();
toklist = tokpat.toklist;
leftellipsis = tokpat.leftellipsis;
rightellipsis = tokpat.rightellipsis;
return *this;
}
TokenPattern TokenPattern::doAnd(const TokenPattern &tokpat) const
{ // Return -this- AND tokpat
TokenPattern res((Pattern *)0);
int4 sa = res.resolveTokens(*this,tokpat);
res.pattern = pattern->doAnd(tokpat.pattern,sa);
return res;
}
TokenPattern TokenPattern::doOr(const TokenPattern &tokpat) const
{ // Return -this- OR tokpat
TokenPattern res((Pattern *)0);
int4 sa = res.resolveTokens(*this,tokpat);
res.pattern = pattern->doOr(tokpat.pattern,sa);
return res;
}
TokenPattern TokenPattern::doCat(const TokenPattern &tokpat) const
{ // Return Concatenation of -this- and -tokpat-
TokenPattern res((Pattern *)0);
int4 sa;
res.leftellipsis = leftellipsis;
res.rightellipsis = rightellipsis;
res.toklist = toklist;
if (rightellipsis||tokpat.leftellipsis) { // Check for interior ellipsis
if (rightellipsis) {
if (!tokpat.alwaysInstructionTrue())
throw SleighError("Interior ellipsis in pattern");
}
if (tokpat.leftellipsis) {
if (!alwaysInstructionTrue())
throw SleighError("Interior ellipsis in pattern");
res.leftellipsis = true;
}
sa = -1;
}
else {
sa = 0;
vector<Token *>::const_iterator iter;
for(iter=toklist.begin();iter!=toklist.end();++iter)
sa += (*iter)->getSize();
for(iter=tokpat.toklist.begin();iter!=tokpat.toklist.end();++iter)
res.toklist.push_back(*iter);
res.rightellipsis = tokpat.rightellipsis;
}
if (res.rightellipsis && res.leftellipsis)
throw SleighError("Double ellipsis in pattern");
if (sa < 0)
res.pattern = pattern->doAnd(tokpat.pattern,0);
else
res.pattern = pattern->doAnd(tokpat.pattern,sa);
return res;
}
TokenPattern TokenPattern::commonSubPattern(const TokenPattern &tokpat) const
{ // Construct pattern that matches anything
// that matches either -this- or -tokpat-
TokenPattern patres((Pattern *)0); // Empty shell
int4 i;
bool reversedirection = false;
if (leftellipsis||tokpat.leftellipsis) {
if (rightellipsis||tokpat.rightellipsis)
throw SleighError("Right/left ellipsis in commonSubPattern");
reversedirection = true;
}
// Find common subset of tokens and ellipses
patres.leftellipsis = leftellipsis || tokpat.leftellipsis;
patres.rightellipsis = rightellipsis || tokpat.rightellipsis;
int4 minnum = toklist.size();
int4 maxnum = tokpat.toklist.size();
if (maxnum < minnum) {
int4 tmp = minnum;
minnum = maxnum;
maxnum = tmp;
}
if (reversedirection) {
for(i=0;i<minnum;++i) {
Token *tok = toklist[toklist.size()-1-i];
if (tok == tokpat.toklist[tokpat.toklist.size()-1-i])
patres.toklist.insert(patres.toklist.begin(),tok);
else
break;
}
if (i<maxnum)
patres.leftellipsis = true;
}
else {
for(i=0;i<minnum;++i) {
Token *tok = toklist[i];
if (tok == tokpat.toklist[i])
patres.toklist.push_back(tok);
else
break;
}
if (i<maxnum)
patres.rightellipsis = true;
}
patres.pattern = pattern->commonSubPattern(tokpat.pattern,0);
return patres;
}
int4 TokenPattern::getMinimumLength(void) const
{ // Add up length of concatenated tokens
int4 length = 0;
for(int4 i=0;i<toklist.size();++i)
length += toklist[i]->getSize();
return length;
}
void PatternExpression::release(PatternExpression *p)
{
p->refcount -= 1;
if (p->refcount <= 0)
delete p;
}
PatternExpression *PatternExpression::restoreExpression(const Element *el,Translate *trans)
{
PatternExpression *res;
const string &nm(el->getName());
if (nm == "tokenfield")
res = new TokenField();
else if (nm == "contextfield")
res = new ContextField();
else if (nm == "intb")
res = new ConstantValue();
else if (nm == "operand_exp")
res = new OperandValue();
else if (nm == "start_exp")
res = new StartInstructionValue();
else if (nm == "offset_exp")
res = new OperandOffsetValue();
else if (nm == "end_exp")
res = new EndInstructionValue();
else if (nm == "plus_exp")
res = new PlusExpression();
else if (nm == "sub_exp")
res = new SubExpression();
else if (nm == "mult_exp")
res = new MultExpression();
else if (nm == "lshift_exp")
res = new LeftShiftExpression();
else if (nm == "rshift_exp")
res = new RightShiftExpression();
else if (nm == "and_exp")
res = new AndExpression();
else if (nm == "or_exp")
res = new OrExpression();
else if (nm == "xor_exp")
res = new XorExpression();
else if (nm == "div_exp")
res = new DivExpression();
else if (nm == "minus_exp")
res = new MinusExpression();
else if (nm == "not_exp")
res = new NotExpression();
else
return (PatternExpression *)0;
res->restoreXml(el,trans);
return res;
}
static intb getInstructionBytes(ParserWalker &walker,int4 bytestart,int4 byteend,bool bigendian)
{ // Build a intb from the instruction bytes
intb res = 0;
uintm tmp;
int4 size,tmpsize;
size = byteend-bytestart+1;
tmpsize = size;
while(tmpsize >= sizeof(uintm)) {
tmp = walker.getInstructionBytes(bytestart,sizeof(uintm));
res <<= 8*sizeof(uintm);
res |= tmp;
bytestart += sizeof(uintm);
tmpsize -= sizeof(uintm);
}
if (tmpsize > 0) {
tmp = walker.getInstructionBytes(bytestart,tmpsize);
res <<= 8*tmpsize;
res |= tmp;
}
if (!bigendian)
byte_swap(res,size);
return res;
}
static intb getContextBytes(ParserWalker &walker,int4 bytestart,int4 byteend)
{ // Build a intb from the context bytes
intb res = 0;
uintm tmp;
int4 size;
size = byteend-bytestart+1;
while(size >= sizeof(uintm)) {
tmp = walker.getContextBytes(bytestart,sizeof(uintm));
res <<= 8*sizeof(uintm);
res |= tmp;
bytestart += sizeof(uintm);
size = byteend-bytestart+1;
}
if (size > 0) {
tmp = walker.getContextBytes(bytestart,size);
res <<= 8*size;
res |= tmp;
}
return res;
}
TokenField::TokenField(Token *tk,bool s,int4 bstart,int4 bend)
{
tok = tk;
bigendian = tok->isBigEndian();
signbit = s;
bitstart = bstart;
bitend = bend;
if (tk->isBigEndian()) {
byteend = (tk->getSize()*8 - bitstart - 1)/8;
bytestart = (tk->getSize()*8 - bitend - 1)/8;
}
else {
bytestart = bitstart/8;
byteend = bitend/8;
}
shift = bitstart % 8;
}
intb TokenField::getValue(ParserWalker &walker) const
{ // Construct value given specific instruction stream
intb res = getInstructionBytes(walker,bytestart,byteend,bigendian);
res >>= shift;
if (signbit)
sign_extend(res,bitend-bitstart);
else
zero_extend(res,bitend-bitstart);
return res;
}
TokenPattern TokenField::genPattern(intb val) const
{ // Generate corresponding pattern if the
// value is forced to be val
return TokenPattern(tok,val,bitstart,bitend);
}
void TokenField::saveXml(ostream &s) const
{
s << "<tokenfield";
s << " bigendian=\"";
if (bigendian)
s << "true\"";
else
s << "false\"";
s << " signbit=\"";
if (signbit)
s << "true\"";
else
s << "false\"";
s << " bitstart=\"" << dec << bitstart << "\"";
s << " bitend=\"" << bitend << "\"";
s << " bytestart=\"" << bytestart << "\"";
s << " byteend=\"" << byteend << "\"";
s << " shift=\"" << shift << "\"/>\n";
}
void TokenField::restoreXml(const Element *el,Translate *trans)
{
tok = (Token *)0;
bigendian = xml_readbool(el->getAttributeValue("bigendian"));
signbit = xml_readbool(el->getAttributeValue("signbit"));
{
istringstream s(el->getAttributeValue("bitstart"));
s.unsetf(ios::dec | ios::hex | ios::oct);
s >> bitstart;
}
{
istringstream s(el->getAttributeValue("bitend"));
s.unsetf(ios::dec | ios::hex | ios::oct);
s >> bitend;
}
{
istringstream s(el->getAttributeValue("bytestart"));
s.unsetf(ios::dec | ios::hex | ios::oct);
s >> bytestart;
}
{
istringstream s(el->getAttributeValue("byteend"));
s.unsetf(ios::dec | ios::hex | ios::oct);
s >> byteend;
}
{
istringstream s(el->getAttributeValue("shift"));
s.unsetf(ios::dec | ios::hex | ios::oct);
s >> shift;
}
}
ContextField::ContextField(bool s,int4 sbit,int4 ebit)
{
signbit = s;
startbit = sbit;
endbit = ebit;
startbyte = startbit/8;
endbyte = endbit/8;
shift = 7 - (endbit%8);
}
intb ContextField::getValue(ParserWalker &walker) const
{
intb res = getContextBytes(walker,startbyte,endbyte);
res >>= shift;
if (signbit)
sign_extend(res,endbit-startbit);
else
zero_extend(res,endbit-startbit);
return res;
}
TokenPattern ContextField::genPattern(intb val) const
{
return TokenPattern(val,startbit,endbit);
}
void ContextField::saveXml(ostream &s) const
{
s << "<contextfield";
s << " signbit=\"";
if (signbit)
s << "true\"";
else
s << "false\"";
s << " startbit=\"" << dec << startbit << "\"";
s << " endbit=\"" << endbit << "\"";
s << " startbyte=\"" << startbyte << "\"";
s << " endbyte=\"" << endbyte << "\"";
s << " shift=\"" << shift << "\"/>\n";
}
void ContextField::restoreXml(const Element *el,Translate *trans)
{
signbit = xml_readbool(el->getAttributeValue("signbit"));
{
istringstream s(el->getAttributeValue("startbit"));
s.unsetf(ios::dec | ios::hex | ios::oct);
s >> startbit;
}
{
istringstream s(el->getAttributeValue("endbit"));
s.unsetf(ios::dec | ios::hex | ios::oct);
s >> endbit;
}
{
istringstream s(el->getAttributeValue("startbyte"));
s.unsetf(ios::dec | ios::hex | ios::oct);
s >> startbyte;
}
{
istringstream s(el->getAttributeValue("endbyte"));
s.unsetf(ios::dec | ios::hex | ios::oct);
s >> endbyte;
}
{
istringstream s(el->getAttributeValue("shift"));
s.unsetf(ios::dec | ios::hex | ios::oct);
s >> shift;
}
}
void ConstantValue::saveXml(ostream &s) const
{
s << "<intb val=\"" << dec << val << "\"/>\n";
}
void ConstantValue::restoreXml(const Element *el,Translate *trans)
{
istringstream s(el->getAttributeValue("val"));
s.unsetf(ios::dec | ios::hex | ios::oct);
s >> val;
}
TokenPattern OperandValue::genPattern(intb val) const
{
// In general an operand cannot be interpreted as any sort
// of static constraint in an equation, and if it is being
// defined by the equation, it should be on the left hand side.
// If the operand has a defining expression already, use
// of the operand in the equation makes sense, its defining
// expression would become a subexpression in the full
// expression. However, since this can be accomplished
// by explicitly copying the subexpression into the full
// expression, we don't support operands as placeholders.
throw SleighError("Operand used in pattern expression");
}
intb OperandValue::minValue(void) const
{
throw SleighError("Operand used in pattern expression");
}
intb OperandValue::maxValue(void) const
{
throw SleighError("Operand used in pattern expression");
}
intb OperandValue::getValue(ParserWalker &walker) const
{ // Get the value of an operand when it is used in
// an expression.
OperandSymbol *sym = ct->getOperand(index);
PatternExpression *patexp = sym->getDefiningExpression();
if (patexp == (PatternExpression *)0) {
TripleSymbol *defsym = sym->getDefiningSymbol();
if (defsym != (TripleSymbol *)0)
patexp = defsym->getPatternExpression();
if (patexp == (PatternExpression *)0)
return 0;
}
ConstructState tempstate;
ParserWalker newwalker(walker.getParserContext());
newwalker.setOutOfBandState(ct,index,&tempstate,walker);
intb res = patexp->getValue(newwalker);
return res;
}
intb OperandValue::getSubValue(const vector<intb> &replace,int4 &listpos) const
{
OperandSymbol *sym = ct->getOperand(index);
return sym->getDefiningExpression()->getSubValue(replace,listpos);
}
bool OperandValue::isConstructorRelative(void) const
{
OperandSymbol *sym = ct->getOperand(index);
return (sym->getOffsetBase()==-1);
}
const string &OperandValue::getName(void) const
{
OperandSymbol *sym = ct->getOperand(index);
return sym->getName();
}
void OperandValue::saveXml(ostream &s) const
{
s << "<operand_exp";
s << " index=\"" << dec << index << "\"";
s << " table=\"0x" << hex << ct->getParent()->getId() << "\"";
s << " ct=\"0x" << ct->getId() << "\"/>\n"; // Save id of our constructor
}
void OperandValue::restoreXml(const Element *el,Translate *trans)
{
uintm ctid,tabid;
{
istringstream s(el->getAttributeValue("index"));
s.unsetf(ios::dec | ios::hex | ios::oct);
s >> index;
}
{
istringstream s(el->getAttributeValue("table"));
s.unsetf(ios::dec | ios::hex | ios::oct);
s >> tabid;
}
{
istringstream s(el->getAttributeValue("ct"));
s.unsetf(ios::dec | ios::hex | ios::oct);
s >> ctid;
}
SleighBase *sleigh = (SleighBase *)trans;
SubtableSymbol *tab = dynamic_cast<SubtableSymbol *>(sleigh->findSymbol(tabid));
ct = tab->getConstructor(ctid);
}
BinaryExpression::BinaryExpression(PatternExpression *l,PatternExpression *r)
{
(left=l)->layClaim();
(right=r)->layClaim();
}
BinaryExpression::~BinaryExpression(void)
{ // Delete only non-pattern values
if (left != (PatternExpression *)0)
PatternExpression::release(left);
if (right != (PatternExpression *)0)
PatternExpression::release(right);
}
void BinaryExpression::saveXml(ostream &s) const
{ // Outer tag is generated by derived classes
left->saveXml(s);
right->saveXml(s);
}
void BinaryExpression::restoreXml(const Element *el,Translate *trans)
{
const List &list(el->getChildren());
List::const_iterator iter;
iter = list.begin();
left = PatternExpression::restoreExpression(*iter,trans);
++iter;
right = PatternExpression::restoreExpression(*iter,trans);
left->layClaim();
right->layClaim();
}
UnaryExpression::UnaryExpression(PatternExpression *u)
{
(unary=u)->layClaim();
}
UnaryExpression::~UnaryExpression(void)
{ // Delete only non-pattern values
if (unary != (PatternExpression *)0)
PatternExpression::release(unary);
}
void UnaryExpression::saveXml(ostream &s) const
{ // Outer tag is generated by derived classes
unary->saveXml(s);
}
void UnaryExpression::restoreXml(const Element *el,Translate *trans)
{
const List &list(el->getChildren());
List::const_iterator iter;
iter = list.begin();
unary = PatternExpression::restoreExpression(*iter,trans);
unary->layClaim();
}
intb PlusExpression::getValue(ParserWalker &walker) const
{
intb leftval = getLeft()->getValue(walker);
intb rightval = getRight()->getValue(walker);
return leftval + rightval;
}
intb PlusExpression::getSubValue(const vector<intb> &replace,int4 &listpos) const
{
intb leftval = getLeft()->getSubValue(replace,listpos); // Must be left first
intb rightval = getRight()->getSubValue(replace,listpos);
return leftval + rightval;
}
void PlusExpression::saveXml(ostream &s) const
{
s << "<plus_exp>\n";
BinaryExpression::saveXml(s);
s << "</plus_exp>\n";
}
intb SubExpression::getValue(ParserWalker &walker) const
{
intb leftval = getLeft()->getValue(walker);
intb rightval = getRight()->getValue(walker);
return leftval - rightval;
}
intb SubExpression::getSubValue(const vector<intb> &replace,int4 &listpos) const
{
intb leftval = getLeft()->getSubValue(replace,listpos); // Must be left first
intb rightval = getRight()->getSubValue(replace,listpos);
return leftval - rightval;
}
void SubExpression::saveXml(ostream &s) const
{
s << "<sub_exp>\n";
BinaryExpression::saveXml(s);
s << "</sub_exp>\n";
}
intb MultExpression::getValue(ParserWalker &walker) const
{
intb leftval = getLeft()->getValue(walker);
intb rightval = getRight()->getValue(walker);
return leftval * rightval;
}
intb MultExpression::getSubValue(const vector<intb> &replace,int4 &listpos) const
{
intb leftval = getLeft()->getSubValue(replace,listpos); // Must be left first
intb rightval = getRight()->getSubValue(replace,listpos);
return leftval * rightval;
}
void MultExpression::saveXml(ostream &s) const
{
s << "<mult_exp>\n";
BinaryExpression::saveXml(s);
s << "</mult_exp>\n";
}
intb LeftShiftExpression::getValue(ParserWalker &walker) const
{
intb leftval = getLeft()->getValue(walker);
intb rightval = getRight()->getValue(walker);
return leftval << rightval;
}
intb LeftShiftExpression::getSubValue(const vector<intb> &replace,int4 &listpos) const
{
intb leftval = getLeft()->getSubValue(replace,listpos); // Must be left first
intb rightval = getRight()->getSubValue(replace,listpos);
return leftval << rightval;
}
void LeftShiftExpression::saveXml(ostream &s) const