Add m-esr52 at 52.6.0

1 files changed, 743 insertions, 0 deletions

diff --git a/dom/xslt/xpath/txCoreFunctionCall.cpp b/dom/xslt/xpath/txCoreFunctionCall.cpp
new file mode 100644
index 000000000..82df8c8ee
--- /dev/null
+++ b/dom/xslt/xpath/txCoreFunctionCall.cpp
@@ -0,0 +1,743 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/ArrayUtils.h"
+#include "mozilla/FloatingPoint.h"
+
+#include "txExpr.h"
+#include "nsAutoPtr.h"
+#include "txNodeSet.h"
+#include "nsGkAtoms.h"
+#include "txIXPathContext.h"
+#include "nsWhitespaceTokenizer.h"
+#include "txXPathTreeWalker.h"
+#include <math.h>
+#include "txStringUtils.h"
+#include "txXMLUtils.h"
+
+using namespace mozilla;
+
+struct txCoreFunctionDescriptor
+{
+    int8_t mMinParams;
+    int8_t mMaxParams;
+    Expr::ResultType mReturnType;
+    nsIAtom** mName;
+};
+
+// This must be ordered in the same order as txCoreFunctionCall::eType.
+// If you change one, change the other.
+static const txCoreFunctionDescriptor descriptTable[] =
+{
+    { 1, 1, Expr::NUMBER_RESULT,  &nsGkAtoms::count }, // COUNT
+    { 1, 1, Expr::NODESET_RESULT, &nsGkAtoms::id }, // ID
+    { 0, 0, Expr::NUMBER_RESULT,  &nsGkAtoms::last }, // LAST
+    { 0, 1, Expr::STRING_RESULT,  &nsGkAtoms::localName }, // LOCAL_NAME
+    { 0, 1, Expr::STRING_RESULT,  &nsGkAtoms::namespaceUri }, // NAMESPACE_URI
+    { 0, 1, Expr::STRING_RESULT,  &nsGkAtoms::name }, // NAME
+    { 0, 0, Expr::NUMBER_RESULT,  &nsGkAtoms::position }, // POSITION
+
+    { 2, -1, Expr::STRING_RESULT, &nsGkAtoms::concat }, // CONCAT
+    { 2, 2, Expr::BOOLEAN_RESULT, &nsGkAtoms::contains }, // CONTAINS
+    { 0, 1, Expr::STRING_RESULT,  &nsGkAtoms::normalizeSpace }, // NORMALIZE_SPACE
+    { 2, 2, Expr::BOOLEAN_RESULT, &nsGkAtoms::startsWith }, // STARTS_WITH
+    { 0, 1, Expr::STRING_RESULT,  &nsGkAtoms::string }, // STRING
+    { 0, 1, Expr::NUMBER_RESULT,  &nsGkAtoms::stringLength }, // STRING_LENGTH
+    { 2, 3, Expr::STRING_RESULT,  &nsGkAtoms::substring }, // SUBSTRING
+    { 2, 2, Expr::STRING_RESULT,  &nsGkAtoms::substringAfter }, // SUBSTRING_AFTER
+    { 2, 2, Expr::STRING_RESULT,  &nsGkAtoms::substringBefore }, // SUBSTRING_BEFORE
+    { 3, 3, Expr::STRING_RESULT,  &nsGkAtoms::translate }, // TRANSLATE
+
+    { 0, 1, Expr::NUMBER_RESULT,  &nsGkAtoms::number }, // NUMBER
+    { 1, 1, Expr::NUMBER_RESULT,  &nsGkAtoms::round }, // ROUND
+    { 1, 1, Expr::NUMBER_RESULT,  &nsGkAtoms::floor }, // FLOOR
+    { 1, 1, Expr::NUMBER_RESULT,  &nsGkAtoms::ceiling }, // CEILING
+    { 1, 1, Expr::NUMBER_RESULT,  &nsGkAtoms::sum }, // SUM
+
+    { 1, 1, Expr::BOOLEAN_RESULT, &nsGkAtoms::boolean }, // BOOLEAN
+    { 0, 0, Expr::BOOLEAN_RESULT, &nsGkAtoms::_false }, // _FALSE
+    { 1, 1, Expr::BOOLEAN_RESULT, &nsGkAtoms::lang }, // LANG
+    { 1, 1, Expr::BOOLEAN_RESULT, &nsGkAtoms::_not }, // _NOT
+    { 0, 0, Expr::BOOLEAN_RESULT, &nsGkAtoms::_true } // _TRUE
+};
+
+
+/*
+ * Evaluates this Expr based on the given context node and processor state
+ * @param context the context node for evaluation of this Expr
+ * @param ps the ContextState containing the stack information needed
+ * for evaluation
+ * @return the result of the evaluation
+ */
+nsresult
+txCoreFunctionCall::evaluate(txIEvalContext* aContext, txAExprResult** aResult)
+{
+    *aResult = nullptr;
+
+    if (!requireParams(descriptTable[mType].mMinParams,
+                       descriptTable[mType].mMaxParams,
+                       aContext)) {
+        return NS_ERROR_XPATH_BAD_ARGUMENT_COUNT;
+    }
+
+    nsresult rv = NS_OK;
+    switch (mType) {
+        case COUNT:
+        {
+            RefPtr<txNodeSet> nodes;
+            rv = evaluateToNodeSet(mParams[0], aContext,
+                                   getter_AddRefs(nodes));
+            NS_ENSURE_SUCCESS(rv, rv);
+
+            return aContext->recycler()->getNumberResult(nodes->size(),
+                                                         aResult);
+        }
+        case ID:
+        {
+            RefPtr<txAExprResult> exprResult;
+            rv = mParams[0]->evaluate(aContext, getter_AddRefs(exprResult));
+            NS_ENSURE_SUCCESS(rv, rv);
+
+            RefPtr<txNodeSet> resultSet;
+            rv = aContext->recycler()->getNodeSet(getter_AddRefs(resultSet));
+            NS_ENSURE_SUCCESS(rv, rv);
+
+            txXPathTreeWalker walker(aContext->getContextNode());
+            
+            if (exprResult->getResultType() == txAExprResult::NODESET) {
+                txNodeSet* nodes = static_cast<txNodeSet*>
+                                              (static_cast<txAExprResult*>
+                                                          (exprResult));
+                int32_t i;
+                for (i = 0; i < nodes->size(); ++i) {
+                    nsAutoString idList;
+                    txXPathNodeUtils::appendNodeValue(nodes->get(i), idList);
+                    nsWhitespaceTokenizer tokenizer(idList);
+                    while (tokenizer.hasMoreTokens()) {
+                        if (walker.moveToElementById(tokenizer.nextToken())) {
+                            resultSet->add(walker.getCurrentPosition());
+                        }
+                    }
+                }
+            }
+            else {
+                nsAutoString idList;
+                exprResult->stringValue(idList);
+                nsWhitespaceTokenizer tokenizer(idList);
+                while (tokenizer.hasMoreTokens()) {
+                    if (walker.moveToElementById(tokenizer.nextToken())) {
+                        resultSet->add(walker.getCurrentPosition());
+                    }
+                }
+            }
+
+            *aResult = resultSet;
+            NS_ADDREF(*aResult);
+
+            return NS_OK;
+        }
+        case LAST:
+        {
+            return aContext->recycler()->getNumberResult(aContext->size(),
+                                                         aResult);
+        }
+        case LOCAL_NAME:
+        case NAME:
+        case NAMESPACE_URI:
+        {
+            // Check for optional arg
+            RefPtr<txNodeSet> nodes;
+            if (!mParams.IsEmpty()) {
+                rv = evaluateToNodeSet(mParams[0], aContext,
+                                       getter_AddRefs(nodes));
+                NS_ENSURE_SUCCESS(rv, rv);
+
+                if (nodes->isEmpty()) {
+                    aContext->recycler()->getEmptyStringResult(aResult);
+
+                    return NS_OK;
+                }
+            }
+
+            const txXPathNode& node = nodes ? nodes->get(0) :
+                                              aContext->getContextNode();
+            switch (mType) {
+                case LOCAL_NAME:
+                {
+                    StringResult* strRes = nullptr;
+                    rv = aContext->recycler()->getStringResult(&strRes);
+                    NS_ENSURE_SUCCESS(rv, rv);
+
+                    *aResult = strRes;
+                    txXPathNodeUtils::getLocalName(node, strRes->mValue);
+
+                    return NS_OK;
+                }
+                case NAMESPACE_URI:
+                {
+                    StringResult* strRes = nullptr;
+                    rv = aContext->recycler()->getStringResult(&strRes);
+                    NS_ENSURE_SUCCESS(rv, rv);
+
+                    *aResult = strRes;
+                    txXPathNodeUtils::getNamespaceURI(node, strRes->mValue);
+
+                    return NS_OK;
+                }
+                case NAME:
+                {
+                    // XXX Namespace: namespaces have a name
+                    if (txXPathNodeUtils::isAttribute(node) ||
+                        txXPathNodeUtils::isElement(node) ||
+                        txXPathNodeUtils::isProcessingInstruction(node)) {
+                        StringResult* strRes = nullptr;
+                        rv = aContext->recycler()->getStringResult(&strRes);
+                        NS_ENSURE_SUCCESS(rv, rv);
+
+                        *aResult = strRes;
+                        txXPathNodeUtils::getNodeName(node, strRes->mValue);
+                    }
+                    else {
+                        aContext->recycler()->getEmptyStringResult(aResult);
+                    }
+
+                    return NS_OK;
+                }
+                default:
+                {
+                    MOZ_CRASH("Unexpected mType?!");
+                }
+            }
+            MOZ_CRASH("Inner mType switch should have returned!");
+        }
+        case POSITION:
+        {
+            return aContext->recycler()->getNumberResult(aContext->position(),
+                                                         aResult);
+        }
+
+        // String functions
+
+        case CONCAT:
+        {
+            RefPtr<StringResult> strRes;
+            rv = aContext->recycler()->getStringResult(getter_AddRefs(strRes));
+            NS_ENSURE_SUCCESS(rv, rv);
+
+            uint32_t i, len = mParams.Length();
+            for (i = 0; i < len; ++i) {
+                rv = mParams[i]->evaluateToString(aContext, strRes->mValue);
+                NS_ENSURE_SUCCESS(rv, rv);
+            }
+
+            NS_ADDREF(*aResult = strRes);
+
+            return NS_OK;
+        }
+        case CONTAINS:
+        {
+            nsAutoString arg2;
+            rv = mParams[1]->evaluateToString(aContext, arg2);
+            NS_ENSURE_SUCCESS(rv, rv);
+
+            if (arg2.IsEmpty()) {
+                aContext->recycler()->getBoolResult(true, aResult);
+            }
+            else {
+                nsAutoString arg1;
+                rv = mParams[0]->evaluateToString(aContext, arg1);
+                NS_ENSURE_SUCCESS(rv, rv);
+
+                aContext->recycler()->getBoolResult(FindInReadable(arg2, arg1),
+                                                    aResult);
+            }
+
+            return NS_OK;
+        }
+        case NORMALIZE_SPACE:
+        {
+            nsAutoString resultStr;
+            if (!mParams.IsEmpty()) {
+                rv = mParams[0]->evaluateToString(aContext, resultStr);
+                NS_ENSURE_SUCCESS(rv, rv);
+            }
+            else {
+                txXPathNodeUtils::appendNodeValue(aContext->getContextNode(),
+                                                  resultStr);
+            }
+
+            RefPtr<StringResult> strRes;
+            rv = aContext->recycler()->getStringResult(getter_AddRefs(strRes));
+            NS_ENSURE_SUCCESS(rv, rv);
+
+            bool addSpace = false;
+            bool first = true;
+            strRes->mValue.SetCapacity(resultStr.Length());
+            char16_t c;
+            uint32_t src;
+            for (src = 0; src < resultStr.Length(); src++) {
+                c = resultStr.CharAt(src);
+                if (XMLUtils::isWhitespace(c)) {
+                    addSpace = true;
+                }
+                else {
+                    if (addSpace && !first)
+                        strRes->mValue.Append(char16_t(' '));
+
+                    strRes->mValue.Append(c);
+                    addSpace = false;
+                    first = false;
+                }
+            }
+            *aResult = strRes;
+            NS_ADDREF(*aResult);
+
+            return NS_OK;
+        }
+        case STARTS_WITH:
+        {
+            nsAutoString arg2;
+            rv = mParams[1]->evaluateToString(aContext, arg2);
+            NS_ENSURE_SUCCESS(rv, rv);
+
+            bool result = false;
+            if (arg2.IsEmpty()) {
+                result = true;
+            }
+            else {
+                nsAutoString arg1;
+                rv = mParams[0]->evaluateToString(aContext, arg1);
+                NS_ENSURE_SUCCESS(rv, rv);
+
+                result = StringBeginsWith(arg1, arg2);
+            }
+
+            aContext->recycler()->getBoolResult(result, aResult);
+
+            return NS_OK;
+        }
+        case STRING:
+        {
+            RefPtr<StringResult> strRes;
+            rv = aContext->recycler()->getStringResult(getter_AddRefs(strRes));
+            NS_ENSURE_SUCCESS(rv, rv);
+
+            if (!mParams.IsEmpty()) {
+                rv = mParams[0]->evaluateToString(aContext, strRes->mValue);
+                NS_ENSURE_SUCCESS(rv, rv);
+            }
+            else {
+                txXPathNodeUtils::appendNodeValue(aContext->getContextNode(),
+                                                  strRes->mValue);
+            }
+
+            NS_ADDREF(*aResult = strRes);
+
+            return NS_OK;
+        }
+        case STRING_LENGTH:
+        {
+            nsAutoString resultStr;
+            if (!mParams.IsEmpty()) {
+                rv = mParams[0]->evaluateToString(aContext, resultStr);
+                NS_ENSURE_SUCCESS(rv, rv);
+            }
+            else {
+                txXPathNodeUtils::appendNodeValue(aContext->getContextNode(),
+                                                  resultStr);
+            }
+            rv = aContext->recycler()->getNumberResult(resultStr.Length(),
+                                                       aResult);
+            NS_ENSURE_SUCCESS(rv, rv);
+
+            return NS_OK;
+        }
+        case SUBSTRING:
+        {
+            nsAutoString src;
+            rv = mParams[0]->evaluateToString(aContext, src);
+            NS_ENSURE_SUCCESS(rv, rv);
+
+            double start;
+            rv = evaluateToNumber(mParams[1], aContext, &start);
+            NS_ENSURE_SUCCESS(rv, rv);
+
+            // check for NaN or +/-Inf
+            if (mozilla::IsNaN(start) ||
+                mozilla::IsInfinite(start) ||
+                start >= src.Length() + 0.5) {
+                aContext->recycler()->getEmptyStringResult(aResult);
+
+                return NS_OK;
+            }
+
+            start = floor(start + 0.5) - 1;
+
+            double end;
+            if (mParams.Length() == 3) {
+                rv = evaluateToNumber(mParams[2], aContext, &end);
+                NS_ENSURE_SUCCESS(rv, rv);
+
+                end += start;
+                if (mozilla::IsNaN(end) || end < 0) {
+                    aContext->recycler()->getEmptyStringResult(aResult);
+
+                    return NS_OK;
+                }
+                
+                if (end > src.Length())
+                    end = src.Length();
+                else
+                    end = floor(end + 0.5);
+            }
+            else {
+                end = src.Length();
+            }
+
+            if (start < 0)
+                start = 0;
+ 
+            if (start > end) {
+                aContext->recycler()->getEmptyStringResult(aResult);
+                
+                return NS_OK;
+            }
+
+            return aContext->recycler()->getStringResult(
+                  Substring(src, (uint32_t)start, (uint32_t)(end - start)),
+                  aResult);
+        }
+        case SUBSTRING_AFTER:
+        {
+            nsAutoString arg1;
+            rv = mParams[0]->evaluateToString(aContext, arg1);
+            NS_ENSURE_SUCCESS(rv, rv);
+
+            nsAutoString arg2;
+            rv = mParams[1]->evaluateToString(aContext, arg2);
+            NS_ENSURE_SUCCESS(rv, rv);
+
+            if (arg2.IsEmpty()) {
+                return aContext->recycler()->getStringResult(arg1, aResult);
+            }
+
+            int32_t idx = arg1.Find(arg2);
+            if (idx == kNotFound) {
+                aContext->recycler()->getEmptyStringResult(aResult);
+                
+                return NS_OK;
+            }
+
+            const nsSubstring& result = Substring(arg1, idx + arg2.Length());
+            return aContext->recycler()->getStringResult(result, aResult);
+        }
+        case SUBSTRING_BEFORE:
+        {
+            nsAutoString arg2;
+            rv = mParams[1]->evaluateToString(aContext, arg2);
+            NS_ENSURE_SUCCESS(rv, rv);
+
+            if (arg2.IsEmpty()) {
+                aContext->recycler()->getEmptyStringResult(aResult);
+
+                return NS_OK;
+            }
+
+            nsAutoString arg1;
+            rv = mParams[0]->evaluateToString(aContext, arg1);
+            NS_ENSURE_SUCCESS(rv, rv);
+
+            int32_t idx = arg1.Find(arg2);
+            if (idx == kNotFound) {
+                aContext->recycler()->getEmptyStringResult(aResult);
+                
+                return NS_OK;
+            }
+
+            return aContext->recycler()->getStringResult(StringHead(arg1, idx),
+                                                         aResult);
+        }
+        case TRANSLATE:
+        {
+            nsAutoString src;
+            rv = mParams[0]->evaluateToString(aContext, src);
+            NS_ENSURE_SUCCESS(rv, rv);
+
+            if (src.IsEmpty()) {
+                aContext->recycler()->getEmptyStringResult(aResult);
+
+                return NS_OK;
+            }
+            
+            RefPtr<StringResult> strRes;
+            rv = aContext->recycler()->getStringResult(getter_AddRefs(strRes));
+            NS_ENSURE_SUCCESS(rv, rv);
+
+            strRes->mValue.SetCapacity(src.Length());
+
+            nsAutoString oldChars, newChars;
+            rv = mParams[1]->evaluateToString(aContext, oldChars);
+            NS_ENSURE_SUCCESS(rv, rv);
+
+            rv = mParams[2]->evaluateToString(aContext, newChars);
+            NS_ENSURE_SUCCESS(rv, rv);
+
+            uint32_t i;
+            int32_t newCharsLength = (int32_t)newChars.Length();
+            for (i = 0; i < src.Length(); i++) {
+                int32_t idx = oldChars.FindChar(src.CharAt(i));
+                if (idx != kNotFound) {
+                    if (idx < newCharsLength)
+                        strRes->mValue.Append(newChars.CharAt((uint32_t)idx));
+                }
+                else {
+                    strRes->mValue.Append(src.CharAt(i));
+                }
+            }
+
+            NS_ADDREF(*aResult = strRes);
+
+            return NS_OK;
+        }
+        
+        // Number functions
+
+        case NUMBER:
+        {
+            double res;
+            if (!mParams.IsEmpty()) {
+                rv = evaluateToNumber(mParams[0], aContext, &res);
+                NS_ENSURE_SUCCESS(rv, rv);
+            }
+            else {
+                nsAutoString resultStr;
+                txXPathNodeUtils::appendNodeValue(aContext->getContextNode(),
+                                                  resultStr);
+                res = txDouble::toDouble(resultStr);
+            }
+            return aContext->recycler()->getNumberResult(res, aResult);
+        }
+        case ROUND:
+        {
+            double dbl;
+            rv = evaluateToNumber(mParams[0], aContext, &dbl);
+            NS_ENSURE_SUCCESS(rv, rv);
+
+            if (mozilla::IsFinite(dbl)) {
+                if (mozilla::IsNegative(dbl) && dbl >= -0.5) {
+                    dbl *= 0;
+                }
+                else {
+                    dbl = floor(dbl + 0.5);
+                }
+            }
+
+            return aContext->recycler()->getNumberResult(dbl, aResult);
+        }
+        case FLOOR:
+        {
+            double dbl;
+            rv = evaluateToNumber(mParams[0], aContext, &dbl);
+            NS_ENSURE_SUCCESS(rv, rv);
+
+            if (mozilla::IsFinite(dbl) && !mozilla::IsNegativeZero(dbl))
+                dbl = floor(dbl);
+
+            return aContext->recycler()->getNumberResult(dbl, aResult);
+        }
+        case CEILING:
+        {
+            double dbl;
+            rv = evaluateToNumber(mParams[0], aContext, &dbl);
+            NS_ENSURE_SUCCESS(rv, rv);
+
+            if (mozilla::IsFinite(dbl)) {
+                if (mozilla::IsNegative(dbl) && dbl > -1)
+                    dbl *= 0;
+                else
+                    dbl = ceil(dbl);
+            }
+
+            return aContext->recycler()->getNumberResult(dbl, aResult);
+        }
+        case SUM:
+        {
+            RefPtr<txNodeSet> nodes;
+            nsresult rv = evaluateToNodeSet(mParams[0], aContext,
+                                            getter_AddRefs(nodes));
+            NS_ENSURE_SUCCESS(rv, rv);
+
+            double res = 0;
+            int32_t i;
+            for (i = 0; i < nodes->size(); ++i) {
+                nsAutoString resultStr;
+                txXPathNodeUtils::appendNodeValue(nodes->get(i), resultStr);
+                res += txDouble::toDouble(resultStr);
+            }
+            return aContext->recycler()->getNumberResult(res, aResult);
+        }
+        
+        // Boolean functions
+        
+        case BOOLEAN:
+        {
+            bool result;
+            nsresult rv = mParams[0]->evaluateToBool(aContext, result);
+            NS_ENSURE_SUCCESS(rv, rv);
+
+            aContext->recycler()->getBoolResult(result, aResult);
+
+            return NS_OK;
+        }
+        case _FALSE:
+        {
+            aContext->recycler()->getBoolResult(false, aResult);
+
+            return NS_OK;
+        }
+        case LANG:
+        {
+            txXPathTreeWalker walker(aContext->getContextNode());
+
+            nsAutoString lang;
+            bool found;
+            do {
+                found = walker.getAttr(nsGkAtoms::lang, kNameSpaceID_XML,
+                                       lang);
+            } while (!found && walker.moveToParent());
+
+            if (!found) {
+                aContext->recycler()->getBoolResult(false, aResult);
+
+                return NS_OK;
+            }
+
+            nsAutoString arg;
+            rv = mParams[0]->evaluateToString(aContext, arg);
+            NS_ENSURE_SUCCESS(rv, rv);
+
+            bool result =
+                StringBeginsWith(lang, arg,
+                                 txCaseInsensitiveStringComparator()) &&
+                (lang.Length() == arg.Length() ||
+                 lang.CharAt(arg.Length()) == '-');
+
+            aContext->recycler()->getBoolResult(result, aResult);
+
+            return NS_OK;
+        }
+        case _NOT:
+        {
+            bool result;
+            rv = mParams[0]->evaluateToBool(aContext, result);
+            NS_ENSURE_SUCCESS(rv, rv);
+
+            aContext->recycler()->getBoolResult(!result, aResult);
+
+            return NS_OK;
+        }
+        case _TRUE:
+        {
+            aContext->recycler()->getBoolResult(true, aResult);
+
+            return NS_OK;
+        }
+    }
+
+    aContext->receiveError(NS_LITERAL_STRING("Internal error"),
+                           NS_ERROR_UNEXPECTED);
+    return NS_ERROR_UNEXPECTED;
+}
+
+Expr::ResultType
+txCoreFunctionCall::getReturnType()
+{
+    return descriptTable[mType].mReturnType;
+}
+
+bool
+txCoreFunctionCall::isSensitiveTo(ContextSensitivity aContext)
+{
+    switch (mType) {
+        case COUNT:
+        case CONCAT:
+        case CONTAINS:
+        case STARTS_WITH:
+        case SUBSTRING:
+        case SUBSTRING_AFTER:
+        case SUBSTRING_BEFORE:
+        case TRANSLATE:
+        case ROUND:
+        case FLOOR:
+        case CEILING:
+        case SUM:
+        case BOOLEAN:
+        case _NOT:
+        case _FALSE:
+        case _TRUE:
+        {
+            return argsSensitiveTo(aContext);
+        }
+        case ID:
+        {
+            return (aContext & NODE_CONTEXT) ||
+                   argsSensitiveTo(aContext);
+        }
+        case LAST:
+        {
+            return !!(aContext & SIZE_CONTEXT);
+        }
+        case LOCAL_NAME:
+        case NAME:
+        case NAMESPACE_URI:
+        case NORMALIZE_SPACE:
+        case STRING:
+        case STRING_LENGTH:
+        case NUMBER:
+        {
+            if (mParams.IsEmpty()) {
+                return !!(aContext & NODE_CONTEXT);
+            }
+            return argsSensitiveTo(aContext);
+        }
+        case POSITION:
+        {
+            return !!(aContext & POSITION_CONTEXT);
+        }
+        case LANG:
+        {
+            return (aContext & NODE_CONTEXT) ||
+                   argsSensitiveTo(aContext);
+        }
+    }
+
+    NS_NOTREACHED("how'd we get here?");
+    return true;
+}
+
+// static
+bool
+txCoreFunctionCall::getTypeFromAtom(nsIAtom* aName, eType& aType)
+{
+    uint32_t i;
+    for (i = 0; i < ArrayLength(descriptTable); ++i) {
+        if (aName == *descriptTable[i].mName) {
+            aType = static_cast<eType>(i);
+
+            return true;
+        }
+    }
+
+    return false;
+}
+
+#ifdef TX_TO_STRING
+nsresult
+txCoreFunctionCall::getNameAtom(nsIAtom** aAtom)
+{
+    NS_ADDREF(*aAtom = *descriptTable[mType].mName);
+    return NS_OK;
+}
+#endif