/**
* Compares the two ExprResults based on XPath 1.0 Recommendation (section 3.4)
*/
bool RelationalExpr::compareResults(txIEvalContext* aContext,
txAExprResult* aLeft,
txAExprResult* aRight) {
short ltype = aLeft->getResultType();
short rtype = aRight->getResultType();
nsresult rv = NS_OK;
// Handle case for just Left NodeSet or Both NodeSets
if (ltype == txAExprResult::NODESET) {
if (rtype == txAExprResult::BOOLEAN) {
BooleanResult leftBool(aLeft->booleanValue());
return compareResults(aContext, &leftBool, aRight);
}
txNodeSet* nodeSet = static_cast<txNodeSet*>(aLeft);
RefPtr<StringResult> strResult;
rv = aContext->recycler()->getStringResult(getter_AddRefs(strResult));
NS_ENSURE_SUCCESS(rv, false);
int32_t i;
for (i = 0; i < nodeSet->size(); ++i) {
strResult->mValue.Truncate();
txXPathNodeUtils::appendNodeValue(nodeSet->get(i), strResult->mValue);
if (compareResults(aContext, strResult, aRight)) {
return true;
}
}
return false;
}
// Handle case for Just Right NodeSet
if (rtype == txAExprResult::NODESET) {
if (ltype == txAExprResult::BOOLEAN) {
BooleanResult rightBool(aRight->booleanValue());
return compareResults(aContext, aLeft, &rightBool);
}
txNodeSet* nodeSet = static_cast<txNodeSet*>(aRight);
RefPtr<StringResult> strResult;
rv = aContext->recycler()->getStringResult(getter_AddRefs(strResult));
NS_ENSURE_SUCCESS(rv, false);
int32_t i;
for (i = 0; i < nodeSet->size(); ++i) {
strResult->mValue.Truncate();
txXPathNodeUtils::appendNodeValue(nodeSet->get(i), strResult->mValue);
if (compareResults(aContext, aLeft, strResult)) {
return true;
}
}
return false;
}
// Neither is a NodeSet
if (mOp == EQUAL || mOp == NOT_EQUAL) {
bool result;
const nsString *lString, *rString;
// If either is a bool, compare as bools.
if (ltype == txAExprResult::BOOLEAN || rtype == txAExprResult::BOOLEAN) {
result = aLeft->booleanValue() == aRight->booleanValue();
}
// If either is a number, compare as numbers.
else if (ltype == txAExprResult::NUMBER || rtype == txAExprResult::NUMBER) {
double lval = aLeft->numberValue();
double rval = aRight->numberValue();
result = (lval == rval);
}
// Otherwise compare as strings. Try to use the stringobject in
// StringResult if possible since that is a common case.
else if ((lString = aLeft->stringValuePointer())) {
if ((rString = aRight->stringValuePointer())) {
result = lString->Equals(*rString);
} else {
nsAutoString rStr;
aRight->stringValue(rStr);
result = lString->Equals(rStr);
}
} else if ((rString = aRight->stringValuePointer())) {
nsAutoString lStr;
aLeft->stringValue(lStr);
result = rString->Equals(lStr);
} else {
nsAutoString lStr, rStr;
aLeft->stringValue(lStr);
aRight->stringValue(rStr);
result = lStr.Equals(rStr);
}
return mOp == EQUAL ? result : !result;
}
double leftDbl = aLeft->numberValue();
double rightDbl = aRight->numberValue();
switch (mOp) {
case LESS_THAN: {
return (leftDbl < rightDbl);
}
case LESS_OR_EQUAL: {
return (leftDbl <= rightDbl);
}
case GREATER_THAN: {
return (leftDbl > rightDbl);
}
case GREATER_OR_EQUAL: {
return (leftDbl >= rightDbl);
}
default: { MOZ_ASSERT_UNREACHABLE("We should have caught all cases"); }
}
return false;
}
/**
* Compares the two ExprResults based on XPath 1.0 Recommendation (section 3.4)
*/
PRBool
RelationalExpr::compareResults(txIEvalContext* aContext, txAExprResult* aLeft,
txAExprResult* aRight)
{
short ltype = aLeft->getResultType();
short rtype = aRight->getResultType();
nsresult rv = NS_OK;
// Handle case for just Left NodeSet or Both NodeSets
if (ltype == txAExprResult::NODESET) {
if (rtype == txAExprResult::BOOLEAN) {
BooleanResult leftBool(aLeft->booleanValue());
return compareResults(aContext, &leftBool, aRight);
}
txNodeSet* nodeSet = static_cast<txNodeSet*>(aLeft);
nsRefPtr<StringResult> strResult;
rv = aContext->recycler()->getStringResult(getter_AddRefs(strResult));
NS_ENSURE_SUCCESS(rv, PR_FALSE);
PRInt32 i;
for (i = 0; i < nodeSet->size(); ++i) {
strResult->mValue.Truncate();
txXPathNodeUtils::appendNodeValue(nodeSet->get(i),
strResult->mValue);
if (compareResults(aContext, strResult, aRight)) {
return PR_TRUE;
}
}
return PR_FALSE;
}
// Handle case for Just Right NodeSet
if (rtype == txAExprResult::NODESET) {
if (ltype == txAExprResult::BOOLEAN) {
BooleanResult rightBool(aRight->booleanValue());
return compareResults(aContext, aLeft, &rightBool);
}
txNodeSet* nodeSet = static_cast<txNodeSet*>(aRight);
nsRefPtr<StringResult> strResult;
rv = aContext->recycler()->getStringResult(getter_AddRefs(strResult));
NS_ENSURE_SUCCESS(rv, PR_FALSE);
PRInt32 i;
for (i = 0; i < nodeSet->size(); ++i) {
strResult->mValue.Truncate();
txXPathNodeUtils::appendNodeValue(nodeSet->get(i),
strResult->mValue);
if (compareResults(aContext, aLeft, strResult)) {
return PR_TRUE;
}
}
return PR_FALSE;
}
// Neither is a NodeSet
if (mOp == EQUAL || mOp == NOT_EQUAL) {
PRBool result;
const nsString *lString, *rString;
// If either is a bool, compare as bools.
if (ltype == txAExprResult::BOOLEAN ||
rtype == txAExprResult::BOOLEAN) {
result = aLeft->booleanValue() == aRight->booleanValue();
}
// If either is a number, compare as numbers.
else if (ltype == txAExprResult::NUMBER ||
rtype == txAExprResult::NUMBER) {
double lval = aLeft->numberValue();
double rval = aRight->numberValue();
result = TX_DOUBLE_COMPARE(lval, ==, rval);
}