xslt.c

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/*
 * xslt.c: Implemetation of an XSL Transformation 1.0 engine
 *
 * Reference:
 *   XSLT specification
 *   http://www.w3.org/TR/1999/REC-xslt-19991116
 *
 *   Associating Style Sheets with XML documents
 *   http://www.w3.org/1999/06/REC-xml-stylesheet-19990629
 *
 * See Copyright for the status of this software.
 *
 * daniel@veillard.com
 */
 
#include "precomp.h"
 
#ifdef WITH_XSLT_DEBUG
#define WITH_XSLT_DEBUG_PARSING
/* #define WITH_XSLT_DEBUG_BLANKS */
#endif
 
const char *xsltEngineVersion = LIBXSLT_VERSION_STRING LIBXSLT_VERSION_EXTRA;
const int xsltLibxsltVersion = LIBXSLT_VERSION;
const int xsltLibxmlVersion = LIBXML_VERSION;
 
#ifdef XSLT_REFACTORED
 
const xmlChar *xsltConstNamespaceNameXSLT = (const xmlChar *) XSLT_NAMESPACE;
 
#define XSLT_ELEMENT_CATEGORY_XSLT 0
#define XSLT_ELEMENT_CATEGORY_EXTENSION 1
#define XSLT_ELEMENT_CATEGORY_LRE 2
 
/*
* xsltLiteralResultMarker:
* Marker for Literal result elements, in order to avoid multiple attempts
* to recognize such elements in the stylesheet's tree.
* This marker is set on node->psvi during the initial traversal
* of a stylesheet's node tree.
*
const xmlChar *xsltLiteralResultMarker =
    (const xmlChar *) "Literal Result Element";
*/
 
/*
* xsltXSLTTextMarker:
* Marker for xsl:text elements. Used to recognize xsl:text elements
* for post-processing of the stylesheet's tree, where those
* elements are removed from the tree.
*/
const xmlChar *xsltXSLTTextMarker = (const xmlChar *) "XSLT Text Element";
 
/*
* xsltXSLTAttrMarker:
* Marker for XSLT attribute on Literal Result Elements.
*/
const xmlChar *xsltXSLTAttrMarker = (const xmlChar *) "LRE XSLT Attr";
 
#endif
 
#ifdef XSLT_LOCALE_WINAPI
extern xmlRMutexPtr xsltLocaleMutex;
#endif
/*
 * Harmless but avoiding a problem when compiling against a
 * libxml <= 2.3.11 without LIBXML_DEBUG_ENABLED
 */
#ifndef LIBXML_DEBUG_ENABLED
double xmlXPathStringEvalNumber(const xmlChar *str);
#endif
/*
 * Useful macros
 */
 
#ifdef  IS_BLANK
#undef  IS_BLANK
#endif
#define IS_BLANK(c) (((c) == 0x20) || ((c) == 0x09) || ((c) == 0xA) ||  \
                     ((c) == 0x0D))
 
#ifdef  IS_BLANK_NODE
#undef  IS_BLANK_NODE
#endif
#define IS_BLANK_NODE(n)                        \
    (((n)->type == XML_TEXT_NODE) && (xsltIsBlank((n)->content)))
 
static void
xsltParseContentError(xsltStylesheetPtr style,
               xmlNodePtr node)
{
    if ((style == NULL) || (node == NULL))
    return;
 
    if (IS_XSLT_ELEM(node))
    xsltTransformError(NULL, style, node,
        "The XSLT-element '%s' is not allowed at this position.\n",
        node->name);
    else
    xsltTransformError(NULL, style, node,
        "The element '%s' is not allowed at this position.\n",
        node->name);
    style->errors++;
}
 
#ifdef XSLT_REFACTORED
#else
static int
exclPrefixPush(xsltStylesheetPtr style, xmlChar * value)
{
    int i;
 
    if (style->exclPrefixMax == 0) {
        style->exclPrefixMax = 4;
        style->exclPrefixTab =
            (xmlChar * *)xmlMalloc(style->exclPrefixMax *
                                   sizeof(style->exclPrefixTab[0]));
        if (style->exclPrefixTab == NULL) {
            xmlGenericError(xmlGenericErrorContext, "malloc failed !\n");
            return (-1);
        }
    }
    /* do not push duplicates */
    for (i = 0;i < style->exclPrefixNr;i++) {
        if (xmlStrEqual(style->exclPrefixTab[i], value))
        return(-1);
    }
    if (style->exclPrefixNr >= style->exclPrefixMax) {
        style->exclPrefixMax *= 2;
        style->exclPrefixTab =
            (xmlChar * *)xmlRealloc(style->exclPrefixTab,
                                    style->exclPrefixMax *
                                    sizeof(style->exclPrefixTab[0]));
        if (style->exclPrefixTab == NULL) {
            xmlGenericError(xmlGenericErrorContext, "realloc failed !\n");
            return (-1);
        }
    }
    style->exclPrefixTab[style->exclPrefixNr] = value;
    style->exclPrefix = value;
    return (style->exclPrefixNr++);
}
static xmlChar *
exclPrefixPop(xsltStylesheetPtr style)
{
    xmlChar *ret;
 
    if (style->exclPrefixNr <= 0)
        return (0);
    style->exclPrefixNr--;
    if (style->exclPrefixNr > 0)
        style->exclPrefix = style->exclPrefixTab[style->exclPrefixNr - 1];
    else
        style->exclPrefix = NULL;
    ret = style->exclPrefixTab[style->exclPrefixNr];
    style->exclPrefixTab[style->exclPrefixNr] = 0;
    return (ret);
}
#endif
 
/************************************************************************
 *                                  *
 *          Helper functions                *
 *                                  *
 ************************************************************************/
 
static int initialized = 0;
void
xsltInit (void) {
    if (initialized == 0) {
    initialized = 1;
#ifdef XSLT_LOCALE_WINAPI
    xsltLocaleMutex = xmlNewRMutex();
#endif
        xsltRegisterAllExtras();
    }
}
 
void
xsltUninit (void) {
#ifdef XSLT_LOCALE_WINAPI
    xmlFreeRMutex(xsltLocaleMutex);
    xsltLocaleMutex = NULL;
#endif
    initialized = 0;
}
 
int
xsltIsBlank(xmlChar *str) {
    if (str == NULL)
    return(1);
    while (*str != 0) {
    if (!(IS_BLANK(*str))) return(0);
    str++;
    }
    return(1);
}
 
/************************************************************************
 *                                  *
 *      Routines to handle XSLT data structures         *
 *                                  *
 ************************************************************************/
static xsltDecimalFormatPtr
xsltNewDecimalFormat(const xmlChar *nsUri, xmlChar *name)
{
    xsltDecimalFormatPtr self;
    /* UTF-8 for 0x2030 */
    static const xmlChar permille[4] = {0xe2, 0x80, 0xb0, 0};
 
    self = xmlMalloc(sizeof(xsltDecimalFormat));
    if (self != NULL) {
    self->next = NULL;
        self->nsUri = nsUri;
    self->name = name;
 
    /* Default values */
    self->digit = xmlStrdup(BAD_CAST("#"));
    self->patternSeparator = xmlStrdup(BAD_CAST(";"));
    self->decimalPoint = xmlStrdup(BAD_CAST("."));
    self->grouping = xmlStrdup(BAD_CAST(","));
    self->percent = xmlStrdup(BAD_CAST("%"));
    self->permille = xmlStrdup(BAD_CAST(permille));
    self->zeroDigit = xmlStrdup(BAD_CAST("0"));
    self->minusSign = xmlStrdup(BAD_CAST("-"));
    self->infinity = xmlStrdup(BAD_CAST("Infinity"));
    self->noNumber = xmlStrdup(BAD_CAST("NaN"));
    }
    return self;
}
 
static void
xsltFreeDecimalFormat(xsltDecimalFormatPtr self)
{
    if (self != NULL) {
    if (self->digit)
        xmlFree(self->digit);
    if (self->patternSeparator)
        xmlFree(self->patternSeparator);
    if (self->decimalPoint)
        xmlFree(self->decimalPoint);
    if (self->grouping)
        xmlFree(self->grouping);
    if (self->percent)
        xmlFree(self->percent);
    if (self->permille)
        xmlFree(self->permille);
    if (self->zeroDigit)
        xmlFree(self->zeroDigit);
    if (self->minusSign)
        xmlFree(self->minusSign);
    if (self->infinity)
        xmlFree(self->infinity);
    if (self->noNumber)
        xmlFree(self->noNumber);
    if (self->name)
        xmlFree(self->name);
    xmlFree(self);
    }
}
 
static void
xsltFreeDecimalFormatList(xsltStylesheetPtr self)
{
    xsltDecimalFormatPtr iter;
    xsltDecimalFormatPtr tmp;
 
    if (self == NULL)
    return;
 
    iter = self->decimalFormat;
    while (iter != NULL) {
    tmp = iter->next;
    xsltFreeDecimalFormat(iter);
    iter = tmp;
    }
}
 
xsltDecimalFormatPtr
xsltDecimalFormatGetByName(xsltStylesheetPtr style, xmlChar *name)
{
    xsltDecimalFormatPtr result = NULL;
 
    if (name == NULL)
    return style->decimalFormat;
 
    while (style != NULL) {
    for (result = style->decimalFormat->next;
         result != NULL;
         result = result->next) {
        if ((result->nsUri == NULL) && xmlStrEqual(name, result->name))
        return result;
    }
    style = xsltNextImport(style);
    }
    return result;
}
 
xsltDecimalFormatPtr
xsltDecimalFormatGetByQName(xsltStylesheetPtr style, const xmlChar *nsUri,
                            const xmlChar *name)
{
    xsltDecimalFormatPtr result = NULL;
 
    if (name == NULL)
    return style->decimalFormat;
 
    while (style != NULL) {
    for (result = style->decimalFormat->next;
         result != NULL;
         result = result->next) {
        if (xmlStrEqual(nsUri, result->nsUri) &&
                xmlStrEqual(name, result->name))
        return result;
    }
    style = xsltNextImport(style);
    }
    return result;
}
 
 
static xsltTemplatePtr
xsltNewTemplate(void) {
    xsltTemplatePtr cur;
 
    cur = (xsltTemplatePtr) xmlMalloc(sizeof(xsltTemplate));
    if (cur == NULL) {
    xsltTransformError(NULL, NULL, NULL,
        "xsltNewTemplate : malloc failed\n");
    return(NULL);
    }
    memset(cur, 0, sizeof(xsltTemplate));
    cur->priority = XSLT_PAT_NO_PRIORITY;
    return(cur);
}
 
static void
xsltFreeTemplate(xsltTemplatePtr template) {
    if (template == NULL)
    return;
    if (template->match) xmlFree(template->match);
/*
*   NOTE: @name and @nameURI are put into the string dict now.
*   if (template->name) xmlFree(template->name);
*   if (template->nameURI) xmlFree(template->nameURI);
*/
/*
    if (template->mode) xmlFree(template->mode);
    if (template->modeURI) xmlFree(template->modeURI);
 */
    if (template->inheritedNs) xmlFree(template->inheritedNs);
 
    /* free profiling data */
    if (template->templCalledTab) xmlFree(template->templCalledTab);
    if (template->templCountTab) xmlFree(template->templCountTab);
 
    memset(template, -1, sizeof(xsltTemplate));
    xmlFree(template);
}
 
static void
xsltFreeTemplateList(xsltTemplatePtr template) {
    xsltTemplatePtr cur;
 
    while (template != NULL) {
    cur = template;
    template = template->next;
    xsltFreeTemplate(cur);
    }
}
 
#ifdef XSLT_REFACTORED
 
static void
xsltFreeNsAliasList(xsltNsAliasPtr item)
{
    xsltNsAliasPtr tmp;
 
    while (item) {
    tmp = item;
    item = item->next;
    xmlFree(tmp);
    }
    return;
}
 
#ifdef XSLT_REFACTORED_XSLT_NSCOMP
static void
xsltFreeNamespaceMap(xsltNsMapPtr item)
{
    xsltNsMapPtr tmp;
 
    while (item) {
    tmp = item;
    item = item->next;
    xmlFree(tmp);
    }
    return;
}
 
static xsltNsMapPtr
xsltNewNamespaceMapItem(xsltCompilerCtxtPtr cctxt,
            xmlDocPtr doc,
            xmlNsPtr ns,
            xmlNodePtr elem)
{
    xsltNsMapPtr ret;
 
    if ((cctxt == NULL) || (doc == NULL) || (ns == NULL))
    return(NULL);
 
    ret = (xsltNsMapPtr) xmlMalloc(sizeof(xsltNsMap));
    if (ret == NULL) {
    xsltTransformError(NULL, cctxt->style, elem,
        "Internal error: (xsltNewNamespaceMapItem) "
        "memory allocation failed.\n");
    return(NULL);
    }
    memset(ret, 0, sizeof(xsltNsMap));
    ret->doc = doc;
    ret->ns = ns;
    ret->origNsName = ns->href;
    /*
    * Store the item at current stylesheet-level.
    */
    if (cctxt->psData->nsMap != NULL)
    ret->next = cctxt->psData->nsMap;
    cctxt->psData->nsMap = ret;
 
    return(ret);
}
#endif /* XSLT_REFACTORED_XSLT_NSCOMP */
 
static void
xsltCompilerVarInfoFree(xsltCompilerCtxtPtr cctxt)
{
    xsltVarInfoPtr ivar = cctxt->ivars, ivartmp;
 
    while (ivar) {
    ivartmp = ivar;
    ivar = ivar->next;
    xmlFree(ivartmp);
    }
}
 
static void
xsltCompilationCtxtFree(xsltCompilerCtxtPtr cctxt)
{
    if (cctxt == NULL)
    return;
#ifdef WITH_XSLT_DEBUG_PARSING
    xsltGenericDebug(xsltGenericDebugContext,
    "Freeing compilation context\n");
    xsltGenericDebug(xsltGenericDebugContext,
    "### Max inodes: %d\n", cctxt->maxNodeInfos);
    xsltGenericDebug(xsltGenericDebugContext,
    "### Max LREs  : %d\n", cctxt->maxLREs);
#endif
    /*
    * Free node-infos.
    */
    if (cctxt->inodeList != NULL) {
    xsltCompilerNodeInfoPtr tmp, cur = cctxt->inodeList;
    while (cur != NULL) {
        tmp = cur;
        cur = cur->next;
        xmlFree(tmp);
    }
    }
    if (cctxt->tmpList != NULL)
    xsltPointerListFree(cctxt->tmpList);
    if (cctxt->nsAliases != NULL)
    xsltFreeNsAliasList(cctxt->nsAliases);
 
    if (cctxt->ivars)
    xsltCompilerVarInfoFree(cctxt);
 
    xmlFree(cctxt);
}
 
static xsltCompilerCtxtPtr
xsltCompilationCtxtCreate(xsltStylesheetPtr style) {
    xsltCompilerCtxtPtr ret;
 
    ret = (xsltCompilerCtxtPtr) xmlMalloc(sizeof(xsltCompilerCtxt));
    if (ret == NULL) {
    xsltTransformError(NULL, style, NULL,
        "xsltCompilerCreate: allocation of compiler "
        "context failed.\n");
    return(NULL);
    }
    memset(ret, 0, sizeof(xsltCompilerCtxt));
 
    ret->errSeverity = XSLT_ERROR_SEVERITY_ERROR;
    ret->tmpList = xsltPointerListCreate(20);
    if (ret->tmpList == NULL) {
    goto internal_err;
    }
 
    return(ret);
 
internal_err:
    xsltCompilationCtxtFree(ret);
    return(NULL);
}
 
static void
xsltLREEffectiveNsNodesFree(xsltEffectiveNsPtr first)
{
    xsltEffectiveNsPtr tmp;
 
    while (first != NULL) {
    tmp = first;
    first = first->nextInStore;
    xmlFree(tmp);
    }
}
 
static void
xsltFreePrincipalStylesheetData(xsltPrincipalStylesheetDataPtr data)
{
    if (data == NULL)
    return;
 
    if (data->inScopeNamespaces != NULL) {
    int i;
    xsltNsListContainerPtr nsi;
    xsltPointerListPtr list =
        (xsltPointerListPtr) data->inScopeNamespaces;
 
    for (i = 0; i < list->number; i++) {
        /*
        * REVISIT TODO: Free info of in-scope namespaces.
        */
        nsi = (xsltNsListContainerPtr) list->items[i];
        if (nsi->list != NULL)
        xmlFree(nsi->list);
        xmlFree(nsi);
    }
    xsltPointerListFree(list);
    data->inScopeNamespaces = NULL;
    }
 
    if (data->exclResultNamespaces != NULL) {
    int i;
    xsltPointerListPtr list = (xsltPointerListPtr)
        data->exclResultNamespaces;
 
    for (i = 0; i < list->number; i++)
        xsltPointerListFree((xsltPointerListPtr) list->items[i]);
 
    xsltPointerListFree(list);
    data->exclResultNamespaces = NULL;
    }
 
    if (data->extElemNamespaces != NULL) {
    xsltPointerListPtr list = (xsltPointerListPtr)
        data->extElemNamespaces;
    int i;
 
    for (i = 0; i < list->number; i++)
        xsltPointerListFree((xsltPointerListPtr) list->items[i]);
 
    xsltPointerListFree(list);
    data->extElemNamespaces = NULL;
    }
    if (data->effectiveNs) {
    xsltLREEffectiveNsNodesFree(data->effectiveNs);
    data->effectiveNs = NULL;
    }
#ifdef XSLT_REFACTORED_XSLT_NSCOMP
    xsltFreeNamespaceMap(data->nsMap);
#endif
    xmlFree(data);
}
 
static xsltPrincipalStylesheetDataPtr
xsltNewPrincipalStylesheetData(void)
{
    xsltPrincipalStylesheetDataPtr ret;
 
    ret = (xsltPrincipalStylesheetDataPtr)
    xmlMalloc(sizeof(xsltPrincipalStylesheetData));
    if (ret == NULL) {
    xsltTransformError(NULL, NULL, NULL,
        "xsltNewPrincipalStylesheetData: memory allocation failed.\n");
    return(NULL);
    }
    memset(ret, 0, sizeof(xsltPrincipalStylesheetData));
 
    /*
    * Global list of in-scope namespaces.
    */
    ret->inScopeNamespaces = xsltPointerListCreate(-1);
    if (ret->inScopeNamespaces == NULL)
    goto internal_err;
    /*
    * Global list of excluded result ns-decls.
    */
    ret->exclResultNamespaces = xsltPointerListCreate(-1);
    if (ret->exclResultNamespaces == NULL)
    goto internal_err;
    /*
    * Global list of extension instruction namespace names.
    */
    ret->extElemNamespaces = xsltPointerListCreate(-1);
    if (ret->extElemNamespaces == NULL)
    goto internal_err;
 
    return(ret);
 
internal_err:
 
    return(NULL);
}
 
#endif
 
static xsltStylesheetPtr
xsltNewStylesheetInternal(xsltStylesheetPtr parent) {
    xsltStylesheetPtr ret = NULL;
 
    ret = (xsltStylesheetPtr) xmlMalloc(sizeof(xsltStylesheet));
    if (ret == NULL) {
    xsltTransformError(NULL, NULL, NULL,
        "xsltNewStylesheet : malloc failed\n");
    goto internal_err;
    }
    memset(ret, 0, sizeof(xsltStylesheet));
 
    ret->parent = parent;
    ret->omitXmlDeclaration = -1;
    ret->standalone = -1;
    ret->decimalFormat = xsltNewDecimalFormat(NULL, NULL);
    ret->indent = -1;
    ret->errors = 0;
    ret->warnings = 0;
    ret->exclPrefixNr = 0;
    ret->exclPrefixMax = 0;
    ret->exclPrefixTab = NULL;
    ret->extInfos = NULL;
    ret->extrasNr = 0;
    ret->internalized = 1;
    ret->literal_result = 0;
    ret->forwards_compatible = 0;
    ret->dict = xmlDictCreate();
#ifdef WITH_XSLT_DEBUG
    xsltGenericDebug(xsltGenericDebugContext,
    "creating dictionary for stylesheet\n");
#endif
 
    if (parent == NULL) {
        ret->principal = ret;
 
        ret->xpathCtxt = xmlXPathNewContext(NULL);
        if (ret->xpathCtxt == NULL) {
            xsltTransformError(NULL, NULL, NULL,
                    "xsltNewStylesheet: xmlXPathNewContext failed\n");
            goto internal_err;
        }
        if (xmlXPathContextSetCache(ret->xpathCtxt, 1, -1, 0) == -1)
            goto internal_err;
    } else {
        ret->principal = parent->principal;
    }
 
    xsltInit();
 
    return(ret);
 
internal_err:
    if (ret != NULL)
    xsltFreeStylesheet(ret);
    return(NULL);
}
 
xsltStylesheetPtr
xsltNewStylesheet(void) {
    return xsltNewStylesheetInternal(NULL);
}
 
int
xsltAllocateExtra(xsltStylesheetPtr style)
{
    return(style->extrasNr++);
}
 
int
xsltAllocateExtraCtxt(xsltTransformContextPtr ctxt)
{
    if (ctxt->extrasNr >= ctxt->extrasMax) {
    int i;
    if (ctxt->extrasNr == 0) {
        ctxt->extrasMax = 20;
        ctxt->extras = (xsltRuntimeExtraPtr)
        xmlMalloc(ctxt->extrasMax * sizeof(xsltRuntimeExtra));
        if (ctxt->extras == NULL) {
        xsltTransformError(ctxt, NULL, NULL,
            "xsltAllocateExtraCtxt: out of memory\n");
        return(0);
        }
        for (i = 0;i < ctxt->extrasMax;i++) {
        ctxt->extras[i].info = NULL;
        ctxt->extras[i].deallocate = NULL;
        ctxt->extras[i].val.ptr = NULL;
        }
 
    } else {
        xsltRuntimeExtraPtr tmp;
 
        ctxt->extrasMax += 100;
        tmp = (xsltRuntimeExtraPtr) xmlRealloc(ctxt->extras,
                    ctxt->extrasMax * sizeof(xsltRuntimeExtra));
        if (tmp == NULL) {
        xsltTransformError(ctxt, NULL, NULL,
            "xsltAllocateExtraCtxt: out of memory\n");
        return(0);
        }
        ctxt->extras = tmp;
        for (i = ctxt->extrasNr;i < ctxt->extrasMax;i++) {
        ctxt->extras[i].info = NULL;
        ctxt->extras[i].deallocate = NULL;
        ctxt->extras[i].val.ptr = NULL;
        }
    }
    }
    return(ctxt->extrasNr++);
}
 
static void
xsltFreeStylesheetList(xsltStylesheetPtr style) {
    xsltStylesheetPtr next;
 
    while (style != NULL) {
    next = style->next;
    xsltFreeStylesheet(style);
    style = next;
    }
}
 
static int
xsltCleanupStylesheetTree(xmlDocPtr doc ATTRIBUTE_UNUSED,
              xmlNodePtr rootElem ATTRIBUTE_UNUSED)
{
#if 0 /* TODO: Currently disabled, since probably not needed. */
    xmlNodePtr cur;
 
    if ((doc == NULL) || (rootElem == NULL) ||
    (rootElem->type != XML_ELEMENT_NODE) ||
    (doc != rootElem->doc))
    return(-1);
 
    /*
    * Cleanup was suggested by Aleksey Sanin:
    * Clear the PSVI field to avoid problems if the
    * node-tree of the stylesheet is intended to be used for
    * further processing by the user (e.g. for compiling it
    * once again - although not recommended).
    */
 
    cur = rootElem;
    while (cur != NULL) {
    if (cur->type == XML_ELEMENT_NODE) {
        /*
        * Clear the PSVI field.
        */
        cur->psvi = NULL;
        if (cur->children) {
        cur = cur->children;
        continue;
        }
    }
 
leave_node:
    if (cur == rootElem)
        break;
    if (cur->next != NULL)
        cur = cur->next;
    else {
        cur = cur->parent;
        if (cur == NULL)
        break;
        goto leave_node;
    }
    }
#endif /* #if 0 */
    return(0);
}
 
void
xsltFreeStylesheet(xsltStylesheetPtr style)
{
    if (style == NULL)
        return;
 
#ifdef XSLT_REFACTORED
    /*
    * Start with a cleanup of the main stylesheet's doc.
    */
    if ((style->principal == style) && (style->doc))
    xsltCleanupStylesheetTree(style->doc,
        xmlDocGetRootElement(style->doc));
#ifdef XSLT_REFACTORED_XSLT_NSCOMP
    /*
    * Restore changed ns-decls before freeing the document.
    */
    if ((style->doc != NULL) &&
    XSLT_HAS_INTERNAL_NSMAP(style))
    {
    xsltRestoreDocumentNamespaces(XSLT_GET_INTERNAL_NSMAP(style),
        style->doc);
    }
#endif /* XSLT_REFACTORED_XSLT_NSCOMP */
#else
    /*
    * Start with a cleanup of the main stylesheet's doc.
    */
    if ((style->parent == NULL) && (style->doc))
    xsltCleanupStylesheetTree(style->doc,
        xmlDocGetRootElement(style->doc));
#endif /* XSLT_REFACTORED */
 
    xsltFreeKeys(style);
    xsltFreeExts(style);
    xsltFreeTemplateHashes(style);
    xsltFreeDecimalFormatList(style);
    xsltFreeTemplateList(style->templates);
    xsltFreeAttributeSetsHashes(style);
    xsltFreeNamespaceAliasHashes(style);
    xsltFreeStylePreComps(style);
    /*
    * Free documents of all included stylsheet modules of this
    * stylesheet level.
    */
    xsltFreeStyleDocuments(style);
    /*
    * TODO: Best time to shutdown extension stuff?
    */
    xsltShutdownExts(style);
 
    if (style->variables != NULL)
        xsltFreeStackElemList(style->variables);
    if (style->cdataSection != NULL)
        xmlHashFree(style->cdataSection, NULL);
    if (style->stripSpaces != NULL)
        xmlHashFree(style->stripSpaces, NULL);
    if (style->nsHash != NULL)
        xmlHashFree(style->nsHash, NULL);
    if (style->exclPrefixTab != NULL)
        xmlFree(style->exclPrefixTab);
    if (style->method != NULL)
        xmlFree(style->method);
    if (style->methodURI != NULL)
        xmlFree(style->methodURI);
    if (style->version != NULL)
        xmlFree(style->version);
    if (style->encoding != NULL)
        xmlFree(style->encoding);
    if (style->doctypePublic != NULL)
        xmlFree(style->doctypePublic);
    if (style->doctypeSystem != NULL)
        xmlFree(style->doctypeSystem);
    if (style->mediaType != NULL)
        xmlFree(style->mediaType);
    if (style->attVTs)
        xsltFreeAVTList(style->attVTs);
    if (style->imports != NULL)
        xsltFreeStylesheetList(style->imports);
 
#ifdef XSLT_REFACTORED
    /*
    * If this is the principal stylesheet, then
    * free its internal data.
    */
    if (style->principal == style) {
    if (style->principalData) {
        xsltFreePrincipalStylesheetData(style->principalData);
        style->principalData = NULL;
    }
    }
#endif
    /*
    * Better to free the main document of this stylesheet level
    * at the end - so here.
    */
    if (style->doc != NULL) {
        xmlFreeDoc(style->doc);
    }
 
#ifdef WITH_XSLT_DEBUG
    xsltGenericDebug(xsltGenericDebugContext,
                     "freeing dictionary from stylesheet\n");
#endif
    xmlDictFree(style->dict);
 
    if (style->xpathCtxt != NULL)
    xmlXPathFreeContext(style->xpathCtxt);
 
    memset(style, -1, sizeof(xsltStylesheet));
    xmlFree(style);
}
 
/************************************************************************
 *                                  *
 *      Parsing of an XSLT Stylesheet               *
 *                                  *
 ************************************************************************/
 
#ifdef XSLT_REFACTORED
    /*
    * This is now performed in an optimized way in xsltParseXSLTTemplate.
    */
#else
static int
xsltGetInheritedNsList(xsltStylesheetPtr style,
                   xsltTemplatePtr template,
                   xmlNodePtr node)
{
    xmlNsPtr cur;
    xmlNsPtr *ret = NULL;
    int nbns = 0;
    int maxns = 10;
    int i;
 
    if ((style == NULL) || (template == NULL) || (node == NULL) ||
    (template->inheritedNsNr != 0) || (template->inheritedNs != NULL))
    return(0);
    while (node != NULL) {
        if (node->type == XML_ELEMENT_NODE) {
            cur = node->nsDef;
            while (cur != NULL) {
        if (xmlStrEqual(cur->href, XSLT_NAMESPACE))
            goto skip_ns;
 
        if ((cur->prefix != NULL) &&
            (xsltCheckExtPrefix(style, cur->prefix)))
            goto skip_ns;
        /*
        * Check if this namespace was excluded.
        * Note that at this point only the exclusions defined
        * on the topmost stylesheet element are in the exclusion-list.
        */
        for (i = 0;i < style->exclPrefixNr;i++) {
            if (xmlStrEqual(cur->href, style->exclPrefixTab[i]))
            goto skip_ns;
        }
                if (ret == NULL) {
                    ret =
                        (xmlNsPtr *) xmlMalloc((maxns + 1) *
                                               sizeof(xmlNsPtr));
                    if (ret == NULL) {
                        xmlGenericError(xmlGenericErrorContext,
                                        "xsltGetInheritedNsList : out of memory!\n");
                        return(0);
                    }
                    ret[nbns] = NULL;
                }
        /*
        * Skip shadowed namespace bindings.
        */
                for (i = 0; i < nbns; i++) {
                    if ((cur->prefix == ret[i]->prefix) ||
                        (xmlStrEqual(cur->prefix, ret[i]->prefix)))
                        break;
                }
                if (i >= nbns) {
                    if (nbns >= maxns) {
                        maxns *= 2;
                        ret = (xmlNsPtr *) xmlRealloc(ret,
                                                      (maxns +
                                                       1) *
                                                      sizeof(xmlNsPtr));
                        if (ret == NULL) {
                            xmlGenericError(xmlGenericErrorContext,
                                            "xsltGetInheritedNsList : realloc failed!\n");
                            return(0);
                        }
                    }
                    ret[nbns++] = cur;
                    ret[nbns] = NULL;
                }
skip_ns:
                cur = cur->next;
            }
        }
        node = node->parent;
    }
    if (nbns != 0) {
#ifdef WITH_XSLT_DEBUG_PARSING
        xsltGenericDebug(xsltGenericDebugContext,
                         "template has %d inherited namespaces\n", nbns);
#endif
    template->inheritedNsNr = nbns;
    template->inheritedNs = ret;
    }
    return (nbns);
}
#endif /* else of XSLT_REFACTORED */
 
void
xsltParseStylesheetOutput(xsltStylesheetPtr style, xmlNodePtr cur)
{
    xmlChar *elements,
     *prop;
    xmlChar *element,
     *end;
 
    if ((cur == NULL) || (style == NULL) || (cur->type != XML_ELEMENT_NODE))
        return;
 
    prop = xmlGetNsProp(cur, (const xmlChar *) "version", NULL);
    if (prop != NULL) {
        if (style->version != NULL)
            xmlFree(style->version);
        style->version = prop;
    }
 
    prop = xmlGetNsProp(cur, (const xmlChar *) "encoding", NULL);
    if (prop != NULL) {
        if (style->encoding != NULL)
            xmlFree(style->encoding);
        style->encoding = prop;
    }
 
    /* relaxed to support xt:document
    * TODO KB: What does "relaxed to support xt:document" mean?
    */
    prop = xmlGetNsProp(cur, (const xmlChar *) "method", NULL);
    if (prop != NULL) {
        const xmlChar *URI;
 
        if (style->method != NULL)
            xmlFree(style->method);
        style->method = NULL;
        if (style->methodURI != NULL)
            xmlFree(style->methodURI);
        style->methodURI = NULL;
 
    /*
    * TODO: Don't use xsltGetQNameURI().
    */
    URI = xsltGetQNameURI(cur, &prop);
    if (prop == NULL) {
        if (style != NULL) style->errors++;
    } else if (URI == NULL) {
            if ((xmlStrEqual(prop, (const xmlChar *) "xml")) ||
                (xmlStrEqual(prop, (const xmlChar *) "html")) ||
                (xmlStrEqual(prop, (const xmlChar *) "text"))) {
                style->method = prop;
            } else {
        xsltTransformError(NULL, style, cur,
                                 "invalid value for method: %s\n", prop);
                if (style != NULL) style->warnings++;
                xmlFree(prop);
            }
    } else {
        style->method = prop;
        style->methodURI = xmlStrdup(URI);
    }
    }
 
    prop = xmlGetNsProp(cur, (const xmlChar *) "doctype-system", NULL);
    if (prop != NULL) {
        if (style->doctypeSystem != NULL)
            xmlFree(style->doctypeSystem);
        style->doctypeSystem = prop;
    }
 
    prop = xmlGetNsProp(cur, (const xmlChar *) "doctype-public", NULL);
    if (prop != NULL) {
        if (style->doctypePublic != NULL)
            xmlFree(style->doctypePublic);
        style->doctypePublic = prop;
    }
 
    prop = xmlGetNsProp(cur, (const xmlChar *) "standalone", NULL);
    if (prop != NULL) {
        if (xmlStrEqual(prop, (const xmlChar *) "yes")) {
            style->standalone = 1;
        } else if (xmlStrEqual(prop, (const xmlChar *) "no")) {
            style->standalone = 0;
        } else {
        xsltTransformError(NULL, style, cur,
                             "invalid value for standalone: %s\n", prop);
            style->errors++;
        }
        xmlFree(prop);
    }
 
    prop = xmlGetNsProp(cur, (const xmlChar *) "indent", NULL);
    if (prop != NULL) {
        if (xmlStrEqual(prop, (const xmlChar *) "yes")) {
            style->indent = 1;
        } else if (xmlStrEqual(prop, (const xmlChar *) "no")) {
            style->indent = 0;
        } else {
        xsltTransformError(NULL, style, cur,
                             "invalid value for indent: %s\n", prop);
            style->errors++;
        }
        xmlFree(prop);
    }
 
    prop = xmlGetNsProp(cur, (const xmlChar *) "omit-xml-declaration", NULL);
    if (prop != NULL) {
        if (xmlStrEqual(prop, (const xmlChar *) "yes")) {
            style->omitXmlDeclaration = 1;
        } else if (xmlStrEqual(prop, (const xmlChar *) "no")) {
            style->omitXmlDeclaration = 0;
        } else {
        xsltTransformError(NULL, style, cur,
                             "invalid value for omit-xml-declaration: %s\n",
                             prop);
            style->errors++;
        }
        xmlFree(prop);
    }
 
    elements = xmlGetNsProp(cur, (const xmlChar *) "cdata-section-elements",
    NULL);
    if (elements != NULL) {
        if (style->cdataSection == NULL)
            style->cdataSection = xmlHashCreate(10);
        if (style->cdataSection == NULL)
            return;
 
        element = elements;
        while (*element != 0) {
            while (IS_BLANK(*element))
                element++;
            if (*element == 0)
                break;
            end = element;
            while ((*end != 0) && (!IS_BLANK(*end)))
                end++;
            element = xmlStrndup(element, end - element);
            if (element) {
#ifdef WITH_XSLT_DEBUG_PARSING
                xsltGenericDebug(xsltGenericDebugContext,
                                 "add cdata section output element %s\n",
                                 element);
#endif
        if (xmlValidateQName(BAD_CAST element, 0) != 0) {
            xsltTransformError(NULL, style, cur,
            "Attribute 'cdata-section-elements': The value "
            "'%s' is not a valid QName.\n", element);
            xmlFree(element);
            style->errors++;
        } else {
            const xmlChar *URI;
 
            /*
            * TODO: Don't use xsltGetQNameURI().
            */
            URI = xsltGetQNameURI(cur, &element);
            if (element == NULL) {
            /*
            * TODO: We'll report additionally an error
            *  via the stylesheet's error handling.
            */
            xsltTransformError(NULL, style, cur,
                "Attribute 'cdata-section-elements': "
                "Not a valid QName.\n");
            style->errors++;
            } else {
            xmlNsPtr ns;
 
            /*
            * XSLT-1.0 "Each QName is expanded into an
            *  expanded-name using the namespace declarations in
            *  effect on the xsl:output element in which the QName
            *  occurs; if there is a default namespace, it is used
            *  for QNames that do not have a prefix"
            * NOTE: Fix of bug #339570.
            */
            if (URI == NULL) {
                ns = xmlSearchNs(style->doc, cur, NULL);
                if (ns != NULL)
                URI = ns->href;
            }
            xmlHashAddEntry2(style->cdataSection, element, URI,
                (void *) "cdata");
            xmlFree(element);
            }
        }
            }
            element = end;
        }
        xmlFree(elements);
    }
 
    prop = xmlGetNsProp(cur, (const xmlChar *) "media-type", NULL);
    if (prop != NULL) {
    if (style->mediaType)
        xmlFree(style->mediaType);
    style->mediaType = prop;
    }
    if (cur->children != NULL) {
    xsltParseContentError(style, cur->children);
    }
}
 
static void
xsltParseStylesheetDecimalFormat(xsltStylesheetPtr style, xmlNodePtr cur)
{
    xmlChar *prop;
    xsltDecimalFormatPtr format;
    xsltDecimalFormatPtr iter;
 
    if ((cur == NULL) || (style == NULL) || (cur->type != XML_ELEMENT_NODE))
    return;
 
    format = style->decimalFormat;
 
    prop = xmlGetNsProp(cur, BAD_CAST("name"), NULL);
    if (prop != NULL) {
        const xmlChar *nsUri;
 
        if (xmlValidateQName(prop, 0) != 0) {
            xsltTransformError(NULL, style, cur,
                "xsl:decimal-format: Invalid QName '%s'.\n", prop);
        style->warnings++;
            xmlFree(prop);
            return;
        }
        /*
        * TODO: Don't use xsltGetQNameURI().
        */
        nsUri = xsltGetQNameURI(cur, &prop);
        if (prop == NULL) {
        style->warnings++;
            return;
        }
    format = xsltDecimalFormatGetByQName(style, nsUri, prop);
    if (format != NULL) {
        xsltTransformError(NULL, style, cur,
     "xsltParseStylestyleDecimalFormat: %s already exists\n", prop);
        style->warnings++;
            xmlFree(prop);
        return;
    }
    format = xsltNewDecimalFormat(nsUri, prop);
    if (format == NULL) {
        xsltTransformError(NULL, style, cur,
     "xsltParseStylestyleDecimalFormat: failed creating new decimal-format\n");
        style->errors++;
            xmlFree(prop);
        return;
    }
    /* Append new decimal-format structure */
    for (iter = style->decimalFormat; iter->next; iter = iter->next)
        ;
    if (iter)
        iter->next = format;
    }
 
    prop = xmlGetNsProp(cur, (const xmlChar *)"decimal-separator", NULL);
    if (prop != NULL) {
    if (format->decimalPoint != NULL) xmlFree(format->decimalPoint);
    format->decimalPoint  = prop;
    }
 
    prop = xmlGetNsProp(cur, (const xmlChar *)"grouping-separator", NULL);
    if (prop != NULL) {
    if (format->grouping != NULL) xmlFree(format->grouping);
    format->grouping  = prop;
    }
 
    prop = xmlGetNsProp(cur, (const xmlChar *)"infinity", NULL);
    if (prop != NULL) {
    if (format->infinity != NULL) xmlFree(format->infinity);
    format->infinity  = prop;
    }
 
    prop = xmlGetNsProp(cur, (const xmlChar *)"minus-sign", NULL);
    if (prop != NULL) {
    if (format->minusSign != NULL) xmlFree(format->minusSign);
    format->minusSign  = prop;
    }
 
    prop = xmlGetNsProp(cur, (const xmlChar *)"NaN", NULL);
    if (prop != NULL) {
    if (format->noNumber != NULL) xmlFree(format->noNumber);
    format->noNumber  = prop;
    }
 
    prop = xmlGetNsProp(cur, (const xmlChar *)"percent", NULL);
    if (prop != NULL) {
    if (format->percent != NULL) xmlFree(format->percent);
    format->percent  = prop;
    }
 
    prop = xmlGetNsProp(cur, (const xmlChar *)"per-mille", NULL);
    if (prop != NULL) {
    if (format->permille != NULL) xmlFree(format->permille);
    format->permille  = prop;
    }
 
    prop = xmlGetNsProp(cur, (const xmlChar *)"zero-digit", NULL);
    if (prop != NULL) {
    if (format->zeroDigit != NULL) xmlFree(format->zeroDigit);
    format->zeroDigit  = prop;
    }
 
    prop = xmlGetNsProp(cur, (const xmlChar *)"digit", NULL);
    if (prop != NULL) {
    if (format->digit != NULL) xmlFree(format->digit);
    format->digit  = prop;
    }
 
    prop = xmlGetNsProp(cur, (const xmlChar *)"pattern-separator", NULL);
    if (prop != NULL) {
    if (format->patternSeparator != NULL) xmlFree(format->patternSeparator);
    format->patternSeparator  = prop;
    }
    if (cur->children != NULL) {
    xsltParseContentError(style, cur->children);
    }
}
 
static void
xsltParseStylesheetPreserveSpace(xsltStylesheetPtr style, xmlNodePtr cur) {
    xmlChar *elements;
    xmlChar *element, *end;
 
    if ((cur == NULL) || (style == NULL) || (cur->type != XML_ELEMENT_NODE))
    return;
 
    elements = xmlGetNsProp(cur, (const xmlChar *)"elements", NULL);
    if (elements == NULL) {
    xsltTransformError(NULL, style, cur,
        "xsltParseStylesheetPreserveSpace: missing elements attribute\n");
    if (style != NULL) style->warnings++;
    return;
    }
 
    if (style->stripSpaces == NULL)
    style->stripSpaces = xmlHashCreate(10);
    if (style->stripSpaces == NULL)
    return;
 
    element = elements;
    while (*element != 0) {
    while (IS_BLANK(*element)) element++;
    if (*element == 0)
        break;
        end = element;
    while ((*end != 0) && (!IS_BLANK(*end))) end++;
    element = xmlStrndup(element, end - element);
    if (element) {
#ifdef WITH_XSLT_DEBUG_PARSING
        xsltGenericDebug(xsltGenericDebugContext,
        "add preserved space element %s\n", element);
#endif
        if (xmlStrEqual(element, (const xmlChar *)"*")) {
        style->stripAll = -1;
        } else {
        const xmlChar *URI;
 
        /*
        * TODO: Don't use xsltGetQNameURI().
        */
                URI = xsltGetQNameURI(cur, &element);
 
        xmlHashAddEntry2(style->stripSpaces, element, URI,
                (xmlChar *) "preserve");
        }
        xmlFree(element);
    }
    element = end;
    }
    xmlFree(elements);
    if (cur->children != NULL) {
    xsltParseContentError(style, cur->children);
    }
}
 
#ifdef XSLT_REFACTORED
#else
static void
xsltParseStylesheetExtPrefix(xsltStylesheetPtr style, xmlNodePtr cur,
                 int isXsltElem) {
    xmlChar *prefixes;
    xmlChar *prefix, *end;
 
    if ((cur == NULL) || (style == NULL) || (cur->type != XML_ELEMENT_NODE))
    return;
 
    if (isXsltElem) {
    /* For xsl:stylesheet/xsl:transform. */
    prefixes = xmlGetNsProp(cur,
        (const xmlChar *)"extension-element-prefixes", NULL);
    } else {
    /* For literal result elements and extension instructions. */
    prefixes = xmlGetNsProp(cur,
        (const xmlChar *)"extension-element-prefixes", XSLT_NAMESPACE);
    }
    if (prefixes == NULL) {
    return;
    }
 
    prefix = prefixes;
    while (*prefix != 0) {
    while (IS_BLANK(*prefix)) prefix++;
    if (*prefix == 0)
        break;
        end = prefix;
    while ((*end != 0) && (!IS_BLANK(*end))) end++;
    prefix = xmlStrndup(prefix, end - prefix);
    if (prefix) {
        xmlNsPtr ns;
 
        if (xmlStrEqual(prefix, (const xmlChar *)"#default"))
        ns = xmlSearchNs(style->doc, cur, NULL);
        else
        ns = xmlSearchNs(style->doc, cur, prefix);
        if (ns == NULL) {
        xsltTransformError(NULL, style, cur,
        "xsl:extension-element-prefix : undefined namespace %s\n",
                             prefix);
        if (style != NULL) style->warnings++;
        } else {
#ifdef WITH_XSLT_DEBUG_PARSING
        xsltGenericDebug(xsltGenericDebugContext,
            "add extension prefix %s\n", prefix);
#endif
        xsltRegisterExtPrefix(style, prefix, ns->href);
        }
        xmlFree(prefix);
    }
    prefix = end;
    }
    xmlFree(prefixes);
}
#endif /* else of XSLT_REFACTORED */
 
static void
xsltParseStylesheetStripSpace(xsltStylesheetPtr style, xmlNodePtr cur) {
    xmlChar *elements;
    xmlChar *element, *end;
 
    if ((cur == NULL) || (style == NULL) || (cur->type != XML_ELEMENT_NODE))
    return;
 
    elements = xmlGetNsProp(cur, (const xmlChar *)"elements", NULL);
    if (elements == NULL) {
    xsltTransformError(NULL, style, cur,
        "xsltParseStylesheetStripSpace: missing elements attribute\n");
    if (style != NULL) style->warnings++;
    return;
    }
 
    if (style->stripSpaces == NULL)
    style->stripSpaces = xmlHashCreate(10);
    if (style->stripSpaces == NULL)
    return;
 
    element = elements;
    while (*element != 0) {
    while (IS_BLANK(*element)) element++;
    if (*element == 0)
        break;
        end = element;
    while ((*end != 0) && (!IS_BLANK(*end))) end++;
    element = xmlStrndup(element, end - element);
    if (element) {
#ifdef WITH_XSLT_DEBUG_PARSING
        xsltGenericDebug(xsltGenericDebugContext,
        "add stripped space element %s\n", element);
#endif
        if (xmlStrEqual(element, (const xmlChar *)"*")) {
        style->stripAll = 1;
        } else {
        const xmlChar *URI;
 
        /*
        * TODO: Don't use xsltGetQNameURI().
        */
                URI = xsltGetQNameURI(cur, &element);
 
        xmlHashAddEntry2(style->stripSpaces, element, URI,
                    (xmlChar *) "strip");
        }
        xmlFree(element);
    }
    element = end;
    }
    xmlFree(elements);
    if (cur->children != NULL) {
    xsltParseContentError(style, cur->children);
    }
}
 
#ifdef XSLT_REFACTORED
#else
static int
xsltParseStylesheetExcludePrefix(xsltStylesheetPtr style, xmlNodePtr cur,
                 int isXsltElem)
{
    int nb = 0;
    xmlChar *prefixes;
    xmlChar *prefix, *end;
 
    if ((cur == NULL) || (style == NULL) || (cur->type != XML_ELEMENT_NODE))
    return(0);
 
    if (isXsltElem)
    prefixes = xmlGetNsProp(cur,
        (const xmlChar *)"exclude-result-prefixes", NULL);
    else
    prefixes = xmlGetNsProp(cur,
        (const xmlChar *)"exclude-result-prefixes", XSLT_NAMESPACE);
 
    if (prefixes == NULL) {
    return(0);
    }
 
    prefix = prefixes;
    while (*prefix != 0) {
    while (IS_BLANK(*prefix)) prefix++;
    if (*prefix == 0)
        break;
        end = prefix;
    while ((*end != 0) && (!IS_BLANK(*end))) end++;
    prefix = xmlStrndup(prefix, end - prefix);
    if (prefix) {
        xmlNsPtr ns;
 
        if (xmlStrEqual(prefix, (const xmlChar *)"#default"))
        ns = xmlSearchNs(style->doc, cur, NULL);
        else
        ns = xmlSearchNs(style->doc, cur, prefix);
        if (ns == NULL) {
        xsltTransformError(NULL, style, cur,
        "xsl:exclude-result-prefixes : undefined namespace %s\n",
                             prefix);
        if (style != NULL) style->warnings++;
        } else {
        if (exclPrefixPush(style, (xmlChar *) ns->href) >= 0) {
#ifdef WITH_XSLT_DEBUG_PARSING
            xsltGenericDebug(xsltGenericDebugContext,
            "exclude result prefix %s\n", prefix);
#endif
            nb++;
        }
        }
        xmlFree(prefix);
    }
    prefix = end;
    }
    xmlFree(prefixes);
    return(nb);
}
#endif /* else of XSLT_REFACTORED */
 
#ifdef XSLT_REFACTORED
 
/*
* xsltTreeEnsureXMLDecl:
* @doc: the doc
*
* BIG NOTE:
*  This was copy&pasted from Libxml2's xmlTreeEnsureXMLDecl() in "tree.c".
* Ensures that there is an XML namespace declaration on the doc.
*
* Returns the XML ns-struct or NULL on API and internal errors.
*/
static xmlNsPtr
xsltTreeEnsureXMLDecl(xmlDocPtr doc)
{
    if (doc == NULL)
    return (NULL);
    if (doc->oldNs != NULL)
    return (doc->oldNs);
    {
    xmlNsPtr ns;
    ns = (xmlNsPtr) xmlMalloc(sizeof(xmlNs));
    if (ns == NULL) {
        xmlGenericError(xmlGenericErrorContext,
        "xsltTreeEnsureXMLDecl: Failed to allocate "
        "the XML namespace.\n");
        return (NULL);
    }
    memset(ns, 0, sizeof(xmlNs));
    ns->type = XML_LOCAL_NAMESPACE;
    /*
    * URGENT TODO: revisit this.
    */
#ifdef LIBXML_NAMESPACE_DICT
    if (doc->dict)
        ns->href = xmlDictLookup(doc->dict, XML_XML_NAMESPACE, -1);
    else
        ns->href = xmlStrdup(XML_XML_NAMESPACE);
#else
    ns->href = xmlStrdup(XML_XML_NAMESPACE);
#endif
    ns->prefix = xmlStrdup((const xmlChar *)"xml");
    doc->oldNs = ns;
    return (ns);
    }
}
 
/*
* xsltTreeAcquireStoredNs:
* @doc: the doc
* @nsName: the namespace name
* @prefix: the prefix
*
* BIG NOTE:
*  This was copy&pasted from Libxml2's xmlDOMWrapStoreNs() in "tree.c".
* Creates or reuses an xmlNs struct on doc->oldNs with
* the given prefix and namespace name.
*
* Returns the aquired ns struct or NULL in case of an API
*         or internal error.
*/
static xmlNsPtr
xsltTreeAcquireStoredNs(xmlDocPtr doc,
            const xmlChar *nsName,
            const xmlChar *prefix)
{
    xmlNsPtr ns;
 
    if (doc == NULL)
    return (NULL);
    if (doc->oldNs != NULL)
    ns = doc->oldNs;
    else
    ns = xsltTreeEnsureXMLDecl(doc);
    if (ns == NULL)
    return (NULL);
    if (ns->next != NULL) {
    /* Reuse. */
    ns = ns->next;
    while (ns != NULL) {
        if ((ns->prefix == NULL) != (prefix == NULL)) {
        /* NOP */
        } else if (prefix == NULL) {
        if (xmlStrEqual(ns->href, nsName))
            return (ns);
        } else {
        if ((ns->prefix[0] == prefix[0]) &&
             xmlStrEqual(ns->prefix, prefix) &&
             xmlStrEqual(ns->href, nsName))
            return (ns);
 
        }
        if (ns->next == NULL)
        break;
        ns = ns->next;
    }
    }
    /* Create. */
    ns->next = xmlNewNs(NULL, nsName, prefix);
    return (ns->next);
}
 
static int
xsltLREBuildEffectiveNs(xsltCompilerCtxtPtr cctxt,
            xmlNodePtr elem)
{
    xmlNsPtr ns;
    xsltNsAliasPtr alias;
 
    if ((cctxt == NULL) || (elem == NULL))
    return(-1);
    if ((cctxt->nsAliases == NULL) || (! cctxt->hasNsAliases))
    return(0);
 
    alias = cctxt->nsAliases;
    while (alias != NULL) {
    if ( /* If both namespaces are NULL... */
        ( (elem->ns == NULL) &&
        ((alias->literalNs == NULL) ||
        (alias->literalNs->href == NULL)) ) ||
        /* ... or both namespace are equal */
        ( (elem->ns != NULL) &&
        (alias->literalNs != NULL) &&
        xmlStrEqual(elem->ns->href, alias->literalNs->href) ) )
    {
        if ((alias->targetNs != NULL) &&
        (alias->targetNs->href != NULL))
        {
        /*
        * Convert namespace.
        */
        if (elem->doc == alias->docOfTargetNs) {
            /*
            * This is the nice case: same docs.
            * This will eventually assign a ns-decl which
            * is shadowed, but this has no negative effect on
            * the generation of the result tree.
            */
            elem->ns = alias->targetNs;
        } else {
            /*
            * This target xmlNs originates from a different
            * stylesheet tree. Try to locate it in the
            * in-scope namespaces.
            * OPTIMIZE TODO: Use the compiler-node-info inScopeNs.
            */
            ns = xmlSearchNs(elem->doc, elem,
            alias->targetNs->prefix);
            /*
            * If no matching ns-decl found, then assign a
            * ns-decl stored in xmlDoc.
            */
            if ((ns == NULL) ||
            (! xmlStrEqual(ns->href, alias->targetNs->href)))
            {
            /*
            * BIG NOTE: The use of xsltTreeAcquireStoredNs()
            *  is not very efficient, but currently I don't
            *  see an other way of *safely* changing a node's
            *  namespace, since the xmlNs struct in
            *  alias->targetNs might come from an other
            *  stylesheet tree. So we need to anchor it in the
            *  current document, without adding it to the tree,
            *  which would otherwise change the in-scope-ns
            *  semantic of the tree.
            */
            ns = xsltTreeAcquireStoredNs(elem->doc,
                alias->targetNs->href,
                alias->targetNs->prefix);
 
            if (ns == NULL) {
                xsltTransformError(NULL, cctxt->style, elem,
                "Internal error in "
                "xsltLREBuildEffectiveNs(): "
                "failed to acquire a stored "
                "ns-declaration.\n");
                cctxt->style->errors++;
                return(-1);
 
            }
            }
            elem->ns = ns;
        }
        } else {
        /*
        * Move into or leave in the NULL namespace.
        */
        elem->ns = NULL;
        }
        break;
    }
    alias = alias->next;
    }
    /*
    * Same with attributes of literal result elements.
    */
    if (elem->properties != NULL) {
    xmlAttrPtr attr = elem->properties;
 
    while (attr != NULL) {
        if (attr->ns == NULL) {
        attr = attr->next;
        continue;
        }
        alias = cctxt->nsAliases;
        while (alias != NULL) {
        if ( /* If both namespaces are NULL... */
            ( (elem->ns == NULL) &&
            ((alias->literalNs == NULL) ||
            (alias->literalNs->href == NULL)) ) ||
            /* ... or both namespace are equal */
            ( (elem->ns != NULL) &&
            (alias->literalNs != NULL) &&
            xmlStrEqual(elem->ns->href, alias->literalNs->href) ) )
        {
            if ((alias->targetNs != NULL) &&
            (alias->targetNs->href != NULL))
            {
            if (elem->doc == alias->docOfTargetNs) {
                elem->ns = alias->targetNs;
            } else {
                ns = xmlSearchNs(elem->doc, elem,
                alias->targetNs->prefix);
                if ((ns == NULL) ||
                (! xmlStrEqual(ns->href, alias->targetNs->href)))
                {
                ns = xsltTreeAcquireStoredNs(elem->doc,
                    alias->targetNs->href,
                    alias->targetNs->prefix);
 
                if (ns == NULL) {
                    xsltTransformError(NULL, cctxt->style, elem,
                    "Internal error in "
                    "xsltLREBuildEffectiveNs(): "
                    "failed to acquire a stored "
                    "ns-declaration.\n");
                    cctxt->style->errors++;
                    return(-1);
 
                }
                }
                elem->ns = ns;
            }
            } else {
            /*
            * Move into or leave in the NULL namespace.
            */
            elem->ns = NULL;
            }
            break;
        }
        alias = alias->next;
        }
 
        attr = attr->next;
    }
    }
    return(0);
}
 
static int
xsltLREBuildEffectiveNsNodes(xsltCompilerCtxtPtr cctxt,
                 xsltStyleItemLRElementInfoPtr item,
                 xmlNodePtr elem,
                 int isLRE)
{
    xmlNsPtr ns, tmpns;
    xsltEffectiveNsPtr effNs, lastEffNs = NULL;
    int i, j, holdByElem;
    xsltPointerListPtr extElemNs = cctxt->inode->extElemNs;
    xsltPointerListPtr exclResultNs = cctxt->inode->exclResultNs;
 
    if ((cctxt == NULL) || (cctxt->inode == NULL) || (elem == NULL) ||
    (item == NULL) || (item->effectiveNs != NULL))
    return(-1);
 
    if (item->inScopeNs == NULL)
    return(0);
 
    extElemNs = cctxt->inode->extElemNs;
    exclResultNs = cctxt->inode->exclResultNs;
 
    for (i = 0; i < item->inScopeNs->totalNumber; i++) {
    ns = item->inScopeNs->list[i];
    /*
    * Skip namespaces designated as excluded namespaces
    * -------------------------------------------------
    *
    * XSLT-20 TODO: In XSLT 2.0 we need to keep namespaces
    *  which are target namespaces of namespace-aliases
    *  regardless if designated as excluded.
    *
    * Exclude the XSLT namespace.
    */
    if (xmlStrEqual(ns->href, XSLT_NAMESPACE))
        goto skip_ns;
 
    /*
    * Apply namespace aliasing
    * ------------------------
    *
    * SPEC XSLT 2.0
    *  "- A namespace node whose string value is a literal namespace
    *     URI is not copied to the result tree.
    *   - A namespace node whose string value is a target namespace URI
    *     is copied to the result tree, whether or not the URI
    *     identifies an excluded namespace."
    *
    * NOTE: The ns-aliasing machanism is non-cascading.
    *  (checked with Saxon, Xalan and MSXML .NET).
    * URGENT TODO: is style->nsAliases the effective list of
    *  ns-aliases, or do we need to lookup the whole
    *  import-tree?
    * TODO: Get rid of import-tree lookup.
    */
    if (cctxt->hasNsAliases) {
        xsltNsAliasPtr alias;
        /*
        * First check for being a target namespace.
        */
        alias = cctxt->nsAliases;
        do {
        /*
        * TODO: Is xmlns="" handled already?
        */
        if ((alias->targetNs != NULL) &&
            (xmlStrEqual(alias->targetNs->href, ns->href)))
        {
            /*
            * Recognized as a target namespace; use it regardless
            * if excluded otherwise.
            */
            goto add_effective_ns;
        }
        alias = alias->next;
        } while (alias != NULL);
 
        alias = cctxt->nsAliases;
        do {
        /*
        * TODO: Is xmlns="" handled already?
        */
        if ((alias->literalNs != NULL) &&
            (xmlStrEqual(alias->literalNs->href, ns->href)))
        {
            /*
            * Recognized as an namespace alias; do not use it.
            */
            goto skip_ns;
        }
        alias = alias->next;
        } while (alias != NULL);
    }
 
    /*
    * Exclude excluded result namespaces.
    */
    if (exclResultNs) {
        for (j = 0; j < exclResultNs->number; j++)
        if (xmlStrEqual(ns->href, BAD_CAST exclResultNs->items[j]))
            goto skip_ns;
    }
    /*
    * Exclude extension-element namespaces.
    */
    if (extElemNs) {
        for (j = 0; j < extElemNs->number; j++)
        if (xmlStrEqual(ns->href, BAD_CAST extElemNs->items[j]))
            goto skip_ns;
    }
 
add_effective_ns:
    /*
    * OPTIMIZE TODO: This information may not be needed.
    */
    if (isLRE && (elem->nsDef != NULL)) {
        holdByElem = 0;
        tmpns = elem->nsDef;
        do {
        if (tmpns == ns) {
            holdByElem = 1;
            break;
        }
        tmpns = tmpns->next;
        } while (tmpns != NULL);
    } else
        holdByElem = 0;
 
 
    /*
    * Add the effective namespace declaration.
    */
    effNs = (xsltEffectiveNsPtr) xmlMalloc(sizeof(xsltEffectiveNs));
    if (effNs == NULL) {
        xsltTransformError(NULL, cctxt->style, elem,
        "Internal error in xsltLREBuildEffectiveNs(): "
        "failed to allocate memory.\n");
        cctxt->style->errors++;
        return(-1);
    }
    if (cctxt->psData->effectiveNs == NULL) {
        cctxt->psData->effectiveNs = effNs;
        effNs->nextInStore = NULL;
    } else {
        effNs->nextInStore = cctxt->psData->effectiveNs;
        cctxt->psData->effectiveNs = effNs;
    }
 
    effNs->next = NULL;
    effNs->prefix = ns->prefix;
    effNs->nsName = ns->href;
    effNs->holdByElem = holdByElem;
 
    if (lastEffNs == NULL)
        item->effectiveNs = effNs;
    else
        lastEffNs->next = effNs;
    lastEffNs = effNs;
 
skip_ns:
    {}
    }
    return(0);
}
 
 
static int
xsltLREInfoCreate(xsltCompilerCtxtPtr cctxt,
          xmlNodePtr elem,
          int isLRE)
{
    xsltStyleItemLRElementInfoPtr item;
 
    if ((cctxt == NULL) || (cctxt->inode == NULL))
    return(-1);
 
    item = (xsltStyleItemLRElementInfoPtr)
    xmlMalloc(sizeof(xsltStyleItemLRElementInfo));
    if (item == NULL) {
    xsltTransformError(NULL, cctxt->style, NULL,
        "Internal error in xsltLREInfoCreate(): "
        "memory allocation failed.\n");
    cctxt->style->errors++;
    return(-1);
    }
    memset(item, 0, sizeof(xsltStyleItemLRElementInfo));
    item->type = XSLT_FUNC_LITERAL_RESULT_ELEMENT;
    /*
    * Store it in the stylesheet.
    */
    item->next = cctxt->style->preComps;
    cctxt->style->preComps = (xsltElemPreCompPtr) item;
    /*
    * @inScopeNs are used for execution of XPath expressions
    *  in AVTs.
    */
    item->inScopeNs = cctxt->inode->inScopeNs;
 
    if (elem)
    xsltLREBuildEffectiveNsNodes(cctxt, item, elem, isLRE);
 
    cctxt->inode->litResElemInfo = item;
    cctxt->inode->nsChanged = 0;
    cctxt->maxLREs++;
    return(0);
}
 
static xsltVarInfoPtr
xsltCompilerVarInfoPush(xsltCompilerCtxtPtr cctxt,
                  xmlNodePtr inst,
                  const xmlChar *name,
                  const xmlChar *nsName)
{
    xsltVarInfoPtr ivar;
 
    if ((cctxt->ivar != NULL) && (cctxt->ivar->next != NULL)) {
    ivar = cctxt->ivar->next;
    } else if ((cctxt->ivar == NULL) && (cctxt->ivars != NULL)) {
    ivar = cctxt->ivars;
    } else {
    ivar = (xsltVarInfoPtr) xmlMalloc(sizeof(xsltVarInfo));
    if (ivar == NULL) {
        xsltTransformError(NULL, cctxt->style, inst,
        "xsltParseInScopeVarPush: xmlMalloc() failed!\n");
        cctxt->style->errors++;
        return(NULL);
    }
    /* memset(retVar, 0, sizeof(xsltInScopeVar)); */
    if (cctxt->ivars == NULL) {
        cctxt->ivars = ivar;
        ivar->prev = NULL;
    } else {
        cctxt->ivar->next = ivar;
        ivar->prev = cctxt->ivar;
    }
    cctxt->ivar = ivar;
    ivar->next = NULL;
    }
    ivar->depth = cctxt->depth;
    ivar->name = name;
    ivar->nsName = nsName;
    return(ivar);
}
 
static void
xsltCompilerVarInfoPop(xsltCompilerCtxtPtr cctxt)
{
 
    while ((cctxt->ivar != NULL) &&
    (cctxt->ivar->depth > cctxt->depth))
    {
    cctxt->ivar = cctxt->ivar->prev;
    }
}
 
/*
* xsltCompilerNodePush:
*
* @cctxt: the compilation context
* @node: the node to be pushed (this can also be the doc-node)
*
*
*
* Returns the current node info structure or
*         NULL in case of an internal error.
*/
static xsltCompilerNodeInfoPtr
xsltCompilerNodePush(xsltCompilerCtxtPtr cctxt, xmlNodePtr node)
{
    xsltCompilerNodeInfoPtr inode, iprev;
 
    if ((cctxt->inode != NULL) && (cctxt->inode->next != NULL)) {
    inode = cctxt->inode->next;
    } else if ((cctxt->inode == NULL) && (cctxt->inodeList != NULL)) {
    inode = cctxt->inodeList;
    } else {
    /*
    * Create a new node-info.
    */
    inode = (xsltCompilerNodeInfoPtr)
        xmlMalloc(sizeof(xsltCompilerNodeInfo));
    if (inode == NULL) {
        xsltTransformError(NULL, cctxt->style, NULL,
        "xsltCompilerNodePush: malloc failed.\n");
        return(NULL);
    }
    memset(inode, 0, sizeof(xsltCompilerNodeInfo));
    if (cctxt->inodeList == NULL)
        cctxt->inodeList = inode;
    else {
        cctxt->inodeLast->next = inode;
        inode->prev = cctxt->inodeLast;
    }
    cctxt->inodeLast = inode;
    cctxt->maxNodeInfos++;
    if (cctxt->inode == NULL) {
        cctxt->inode = inode;
        /*
        * Create an initial literal result element info for
        * the root of the stylesheet.
        */
        xsltLREInfoCreate(cctxt, NULL, 0);
    }
    }
    cctxt->depth++;
    cctxt->inode = inode;
    /*
    * REVISIT TODO: Keep the reset always complete.
    * NOTE: Be carefull with the @node, since it might be
    *  a doc-node.
    */
    inode->node = node;
    inode->depth = cctxt->depth;
    inode->templ = NULL;
    inode->category = XSLT_ELEMENT_CATEGORY_XSLT;
    inode->type = 0;
    inode->item = NULL;
    inode->curChildType = 0;
    inode->extContentHandled = 0;
    inode->isRoot = 0;
 
    if (inode->prev != NULL) {
    iprev = inode->prev;
    /*
    * Inherit the following information:
    * ---------------------------------
    *
    * In-scope namespaces
    */
    inode->inScopeNs = iprev->inScopeNs;
    /*
    * Info for literal result elements
    */
    inode->litResElemInfo = iprev->litResElemInfo;
    inode->nsChanged = iprev->nsChanged;
    /*
    * Excluded result namespaces
    */
    inode->exclResultNs = iprev->exclResultNs;
    /*
    * Extension instruction namespaces
    */
    inode->extElemNs = iprev->extElemNs;
    /*
    * Whitespace preservation
    */
    inode->preserveWhitespace = iprev->preserveWhitespace;
    /*
    * Forwards-compatible mode
    */
    inode->forwardsCompat = iprev->forwardsCompat;
    } else {
    inode->inScopeNs = NULL;
    inode->exclResultNs = NULL;
    inode->extElemNs = NULL;
    inode->preserveWhitespace = 0;
    inode->forwardsCompat = 0;
    }
 
    return(inode);
}
 
/*
* xsltCompilerNodePop:
*
* @cctxt: the compilation context
* @node: the node to be pushed (this can also be the doc-node)
*
* Pops the current node info.
*/
static void
xsltCompilerNodePop(xsltCompilerCtxtPtr cctxt, xmlNodePtr node)
{
    if (cctxt->inode == NULL) {
    xmlGenericError(xmlGenericErrorContext,
        "xsltCompilerNodePop: Top-node mismatch.\n");
    return;
    }
    /*
    * NOTE: Be carefull with the @node, since it might be
    *  a doc-node.
    */
    if (cctxt->inode->node != node) {
    xmlGenericError(xmlGenericErrorContext,
    "xsltCompilerNodePop: Node mismatch.\n");
    goto mismatch;
    }
    if (cctxt->inode->depth != cctxt->depth) {
    xmlGenericError(xmlGenericErrorContext,
    "xsltCompilerNodePop: Depth mismatch.\n");
    goto mismatch;
    }
    cctxt->depth--;
    /*
    * Pop information of variables.
    */
    if ((cctxt->ivar) && (cctxt->ivar->depth > cctxt->depth))
    xsltCompilerVarInfoPop(cctxt);
 
    cctxt->inode = cctxt->inode->prev;
    if (cctxt->inode != NULL)
    cctxt->inode->curChildType = 0;
    return;
 
mismatch:
    {
    const xmlChar *nsName = NULL, *name = NULL;
    const xmlChar *infnsName = NULL, *infname = NULL;
 
    if (node) {
        if (node->type == XML_ELEMENT_NODE) {
        name = node->name;
        if (node->ns != NULL)
            nsName = node->ns->href;
        else
            nsName = BAD_CAST "";
        } else {
        name = BAD_CAST "#document";
        nsName = BAD_CAST "";
        }
    } else
        name = BAD_CAST "Not given";
 
    if (cctxt->inode->node) {
        if (node->type == XML_ELEMENT_NODE) {
        infname = cctxt->inode->node->name;
        if (cctxt->inode->node->ns != NULL)
            infnsName = cctxt->inode->node->ns->href;
        else
            infnsName = BAD_CAST "";
        } else {
        infname = BAD_CAST "#document";
        infnsName = BAD_CAST "";
        }
    } else
        infname = BAD_CAST "Not given";
 
 
    xmlGenericError(xmlGenericErrorContext,
        "xsltCompilerNodePop: Given   : '%s' URI '%s'\n",
        name, nsName);
    xmlGenericError(xmlGenericErrorContext,
        "xsltCompilerNodePop: Expected: '%s' URI '%s'\n",
        infname, infnsName);
    }
}
 
/*
* xsltCompilerBuildInScopeNsList:
*
* Create and store the list of in-scope namespaces for the given
* node in the stylesheet. If there are no changes in the in-scope
* namespaces then the last ns-info of the ancestor axis will be returned.
* Compilation-time only.
*
* Returns the ns-info or NULL if there are no namespaces in scope.
*/
static xsltNsListContainerPtr
xsltCompilerBuildInScopeNsList(xsltCompilerCtxtPtr cctxt, xmlNodePtr node)
{
    xsltNsListContainerPtr nsi = NULL;
    xmlNsPtr *list = NULL, ns;
    int i, maxns = 5;
    /*
    * Create a new ns-list for this position in the node-tree.
    * xmlGetNsList() will return NULL, if there are no ns-decls in the
    * tree. Note that the ns-decl for the XML namespace is not added
    * to the resulting list; the XPath module handles the XML namespace
    * internally.
    */
    while (node != NULL) {
        if (node->type == XML_ELEMENT_NODE) {
            ns = node->nsDef;
            while (ns != NULL) {
                if (nsi == NULL) {
            nsi = (xsltNsListContainerPtr)
            xmlMalloc(sizeof(xsltNsListContainer));
            if (nsi == NULL) {
            xsltTransformError(NULL, cctxt->style, NULL,
                "xsltCompilerBuildInScopeNsList: "
                "malloc failed!\n");
            goto internal_err;
            }
            memset(nsi, 0, sizeof(xsltNsListContainer));
                    nsi->list =
                        (xmlNsPtr *) xmlMalloc(maxns * sizeof(xmlNsPtr));
                    if (nsi->list == NULL) {
            xsltTransformError(NULL, cctxt->style, NULL,
                "xsltCompilerBuildInScopeNsList: "
                "malloc failed!\n");
            goto internal_err;
                    }
                    nsi->list[0] = NULL;
                }
        /*
        * Skip shadowed namespace bindings.
        */
                for (i = 0; i < nsi->totalNumber; i++) {
                    if ((ns->prefix == nsi->list[i]->prefix) ||
                        (xmlStrEqual(ns->prefix, nsi->list[i]->prefix)))
            break;
                }
                if (i >= nsi->totalNumber) {
                    if (nsi->totalNumber +1 >= maxns) {
                        maxns *= 2;
            nsi->list =
                (xmlNsPtr *) xmlRealloc(nsi->list,
                maxns * sizeof(xmlNsPtr));
                        if (nsi->list == NULL) {
                            xsltTransformError(NULL, cctxt->style, NULL,
                "xsltCompilerBuildInScopeNsList: "
                "realloc failed!\n");
                goto internal_err;
                        }
                    }
                    nsi->list[nsi->totalNumber++] = ns;
                    nsi->list[nsi->totalNumber] = NULL;
                }
 
                ns = ns->next;
            }
        }
        node = node->parent;
    }
    if (nsi == NULL)
    return(NULL);
    /*
    * Move the default namespace to last position.
    */
    nsi->xpathNumber = nsi->totalNumber;
    for (i = 0; i < nsi->totalNumber; i++) {
    if (nsi->list[i]->prefix == NULL) {
        ns = nsi->list[i];
        nsi->list[i] = nsi->list[nsi->totalNumber-1];
        nsi->list[nsi->totalNumber-1] = ns;
        nsi->xpathNumber--;
        break;
    }
    }
    /*
    * Store the ns-list in the stylesheet.
    */
    if (xsltPointerListAddSize(
    (xsltPointerListPtr)cctxt->psData->inScopeNamespaces,
    (void *) nsi, 5) == -1)
    {
    xmlFree(nsi);
    nsi = NULL;
    xsltTransformError(NULL, cctxt->style, NULL,
        "xsltCompilerBuildInScopeNsList: failed to add ns-info.\n");
    goto internal_err;
    }
    /*
    * Notify of change in status wrt namespaces.
    */
    if (cctxt->inode != NULL)
    cctxt->inode->nsChanged = 1;
 
    return(nsi);
 
internal_err:
    if (list != NULL)
    xmlFree(list);
    cctxt->style->errors++;
    return(NULL);
}
 
static int
xsltParseNsPrefixList(xsltCompilerCtxtPtr cctxt,
              xsltPointerListPtr list,
              xmlNodePtr node,
              const xmlChar *value)
{
    xmlChar *cur, *end;
    xmlNsPtr ns;
 
    if ((cctxt == NULL) || (value == NULL) || (list == NULL))
    return(-1);
 
    list->number = 0;
 
    cur = (xmlChar *) value;
    while (*cur != 0) {
    while (IS_BLANK(*cur)) cur++;
    if (*cur == 0)
        break;
    end = cur;
    while ((*end != 0) && (!IS_BLANK(*end))) end++;
    cur = xmlStrndup(cur, end - cur);
    if (cur == NULL) {
        cur = end;
        continue;
    }
    /*
    * TODO: Export and use xmlSearchNsByPrefixStrict()
    *   in Libxml2, tree.c, since xmlSearchNs() is in most
    *   cases not efficient and in some cases not correct.
    *
    * XSLT-2 TODO: XSLT 2.0 allows an additional "#all" value.
    */
    if ((cur[0] == '#') &&
        xmlStrEqual(cur, (const xmlChar *)"#default"))
        ns = xmlSearchNs(cctxt->style->doc, node, NULL);
    else
        ns = xmlSearchNs(cctxt->style->doc, node, cur);
 
    if (ns == NULL) {
        /*
        * TODO: Better to report the attr-node, otherwise
        *  the user won't know which attribute was invalid.
        */
        xsltTransformError(NULL, cctxt->style, node,
        "No namespace binding in scope for prefix '%s'.\n", cur);
        /*
        * XSLT-1.0: "It is an error if there is no namespace
        *  bound to the prefix on the element bearing the
        *  exclude-result-prefixes or xsl:exclude-result-prefixes
        *  attribute."
        */
        cctxt->style->errors++;
    } else {
#ifdef WITH_XSLT_DEBUG_PARSING
        xsltGenericDebug(xsltGenericDebugContext,
        "resolved prefix '%s'\n", cur);
#endif
        /*
        * Note that we put the namespace name into the dict.
        */
        if (xsltPointerListAddSize(list,
        (void *) xmlDictLookup(cctxt->style->dict,
        ns->href, -1), 5) == -1)
        {
        xmlFree(cur);
        goto internal_err;
        }
    }
    xmlFree(cur);
 
    cur = end;
    }
    return(0);
 
internal_err:
    cctxt->style->errors++;
    return(-1);
}
 
static xsltPointerListPtr
xsltCompilerUtilsCreateMergedList(xsltPointerListPtr first,
                xsltPointerListPtr second)
{
    xsltPointerListPtr ret;
    size_t num;
 
    if (first)
    num = first->number;
    else
    num = 0;
    if (second)
    num += second->number;
    if (num == 0)
    return(NULL);
    ret = xsltPointerListCreate(num);
    if (ret == NULL)
    return(NULL);
    /*
    * Copy contents.
    */
    if ((first != NULL) &&  (first->number != 0)) {
    memcpy(ret->items, first->items,
        first->number * sizeof(void *));
    if ((second != NULL) && (second->number != 0))
        memcpy(ret->items + first->number, second->items,
        second->number * sizeof(void *));
    } else if ((second != NULL) && (second->number != 0))
    memcpy(ret->items, (void *) second->items,
        second->number * sizeof(void *));
    ret->number = num;
    return(ret);
}
 
/*
* xsltParseExclResultPrefixes:
*
* Create and store the list of in-scope namespaces for the given
* node in the stylesheet. If there are no changes in the in-scope
* namespaces then the last ns-info of the ancestor axis will be returned.
* Compilation-time only.
*
* Returns the ns-info or NULL if there are no namespaces in scope.
*/
static xsltPointerListPtr
xsltParseExclResultPrefixes(xsltCompilerCtxtPtr cctxt, xmlNodePtr node,
                xsltPointerListPtr def,
                int instrCategory)
{
    xsltPointerListPtr list = NULL;
    xmlChar *value;
    xmlAttrPtr attr;
 
    if ((cctxt == NULL) || (node == NULL))
    return(NULL);
 
    if (instrCategory == XSLT_ELEMENT_CATEGORY_XSLT)
    attr = xmlHasNsProp(node, BAD_CAST "exclude-result-prefixes", NULL);
    else
    attr = xmlHasNsProp(node, BAD_CAST "exclude-result-prefixes",
        XSLT_NAMESPACE);
    if (attr == NULL)
    return(def);
 
    if (attr && (instrCategory == XSLT_ELEMENT_CATEGORY_LRE)) {
    /*
    * Mark the XSLT attr.
    */
    attr->psvi = (void *) xsltXSLTAttrMarker;
    }
 
    if ((attr->children != NULL) &&
    (attr->children->content != NULL))
    value = attr->children->content;
    else {
    xsltTransformError(NULL, cctxt->style, node,
        "Attribute 'exclude-result-prefixes': Invalid value.\n");
    cctxt->style->errors++;
    return(def);
    }
 
    if (xsltParseNsPrefixList(cctxt, cctxt->tmpList, node,
    BAD_CAST value) != 0)
    goto exit;
    if (cctxt->tmpList->number == 0)
    goto exit;
    /*
    * Merge the list with the inherited list.
    */
    list = xsltCompilerUtilsCreateMergedList(def, cctxt->tmpList);
    if (list == NULL)
    goto exit;
    /*
    * Store the list in the stylesheet/compiler context.
    */
    if (xsltPointerListAddSize(
    cctxt->psData->exclResultNamespaces, list, 5) == -1)
    {
    xsltPointerListFree(list);
    list = NULL;
    goto exit;
    }
    /*
    * Notify of change in status wrt namespaces.
    */
    if (cctxt->inode != NULL)
    cctxt->inode->nsChanged = 1;
 
exit:
    if (list != NULL)
    return(list);
    else
    return(def);
}
 
/*
* xsltParseExtElemPrefixes:
*
* Create and store the list of in-scope namespaces for the given
* node in the stylesheet. If there are no changes in the in-scope
* namespaces then the last ns-info of the ancestor axis will be returned.
* Compilation-time only.
*
* Returns the ns-info or NULL if there are no namespaces in scope.
*/
static xsltPointerListPtr
xsltParseExtElemPrefixes(xsltCompilerCtxtPtr cctxt, xmlNodePtr node,
             xsltPointerListPtr def,
             int instrCategory)
{
    xsltPointerListPtr list = NULL;
    xmlAttrPtr attr;
    xmlChar *value;
    int i;
 
    if ((cctxt == NULL) || (node == NULL))
    return(NULL);
 
    if (instrCategory == XSLT_ELEMENT_CATEGORY_XSLT)
    attr = xmlHasNsProp(node, BAD_CAST "extension-element-prefixes", NULL);
    else
    attr = xmlHasNsProp(node, BAD_CAST "extension-element-prefixes",
        XSLT_NAMESPACE);
    if (attr == NULL)
    return(def);
 
    if (attr && (instrCategory == XSLT_ELEMENT_CATEGORY_LRE)) {
    /*
    * Mark the XSLT attr.
    */
    attr->psvi = (void *) xsltXSLTAttrMarker;
    }
 
    if ((attr->children != NULL) &&
    (attr->children->content != NULL))
    value = attr->children->content;
    else {
    xsltTransformError(NULL, cctxt->style, node,
        "Attribute 'extension-element-prefixes': Invalid value.\n");
    cctxt->style->errors++;
    return(def);
    }
 
 
    if (xsltParseNsPrefixList(cctxt, cctxt->tmpList, node,
    BAD_CAST value) != 0)
    goto exit;
 
    if (cctxt->tmpList->number == 0)
    goto exit;
    /*
    * REVISIT: Register the extension namespaces.
    */
    for (i = 0; i < cctxt->tmpList->number; i++)
    xsltRegisterExtPrefix(cctxt->style, NULL,
    BAD_CAST cctxt->tmpList->items[i]);
    /*
    * Merge the list with the inherited list.
    */
    list = xsltCompilerUtilsCreateMergedList(def, cctxt->tmpList);
    if (list == NULL)
    goto exit;
    /*
    * Store the list in the stylesheet.
    */
    if (xsltPointerListAddSize(
    cctxt->psData->extElemNamespaces, list, 5) == -1)
    {
    xsltPointerListFree(list);
    list = NULL;
    goto exit;
    }
    /*
    * Notify of change in status wrt namespaces.
    */
    if (cctxt->inode != NULL)
    cctxt->inode->nsChanged = 1;
 
exit:
    if (list != NULL)
    return(list);
    else
    return(def);
}
 
/*
* xsltParseAttrXSLTVersion:
*
* @cctxt: the compilation context
* @node: the element-node
* @isXsltElem: whether this is an XSLT element
*
* Parses the attribute xsl:version.
*
* Returns 1 if there was such an attribute, 0 if not and
*         -1 if an internal or API error occured.
*/
static int
xsltParseAttrXSLTVersion(xsltCompilerCtxtPtr cctxt, xmlNodePtr node,
             int instrCategory)
{
    xmlChar *value;
    xmlAttrPtr attr;
 
    if ((cctxt == NULL) || (node == NULL))
    return(-1);
 
    if (instrCategory == XSLT_ELEMENT_CATEGORY_XSLT)
    attr = xmlHasNsProp(node, BAD_CAST "version", NULL);
    else
    attr = xmlHasNsProp(node, BAD_CAST "version", XSLT_NAMESPACE);
 
    if (attr == NULL)
    return(0);
 
    attr->psvi = (void *) xsltXSLTAttrMarker;
 
    if ((attr->children != NULL) &&
    (attr->children->content != NULL))
    value = attr->children->content;
    else {
    xsltTransformError(NULL, cctxt->style, node,
        "Attribute 'version': Invalid value.\n");
    cctxt->style->errors++;
    return(1);
    }
 
    if (! xmlStrEqual(value, (const xmlChar *)"1.0")) {
    cctxt->inode->forwardsCompat = 1;
    /*
    * TODO: To what extent do we support the
    *  forwards-compatible mode?
    */
    /*
    * Report this only once per compilation episode.
    */
    if (! cctxt->hasForwardsCompat) {
        cctxt->hasForwardsCompat = 1;
        cctxt->errSeverity = XSLT_ERROR_SEVERITY_WARNING;
        xsltTransformError(NULL, cctxt->style, node,
        "Warning: the attribute xsl:version specifies a value "
        "different from '1.0'. Switching to forwards-compatible "
        "mode. Only features of XSLT 1.0 are supported by this "
        "processor.\n");
        cctxt->style->warnings++;
        cctxt->errSeverity = XSLT_ERROR_SEVERITY_ERROR;
    }
    } else {
    cctxt->inode->forwardsCompat = 0;
    }
 
    if (attr && (instrCategory == XSLT_ELEMENT_CATEGORY_LRE)) {
    /*
    * Set a marker on XSLT attributes.
    */
    attr->psvi = (void *) xsltXSLTAttrMarker;
    }
    return(1);
}
 
static int
xsltParsePreprocessStylesheetTree(xsltCompilerCtxtPtr cctxt, xmlNodePtr node)
{
    xmlNodePtr deleteNode, cur, txt, textNode = NULL;
    xmlDocPtr doc;
    xsltStylesheetPtr style;
    int internalize = 0, findSpaceAttr;
    int xsltStylesheetElemDepth;
    xmlAttrPtr attr;
    xmlChar *value;
    const xmlChar *name, *nsNameXSLT = NULL;
    int strictWhitespace, inXSLText = 0;
#ifdef XSLT_REFACTORED_XSLT_NSCOMP
    xsltNsMapPtr nsMapItem;
#endif
 
    if ((cctxt == NULL) || (cctxt->style == NULL) ||
    (node == NULL) || (node->type != XML_ELEMENT_NODE))
        return(-1);
 
    doc = node->doc;
    if (doc == NULL)
    goto internal_err;
 
    style = cctxt->style;
    if ((style->dict != NULL) && (doc->dict == style->dict))
    internalize = 1;
    else
        style->internalized = 0;
 
    /*
    * Init value of xml:space. Since this might be an embedded
    * stylesheet, this is needed to be performed on the element
    * where the stylesheet is rooted at, taking xml:space of
    * ancestors into account.
    */
    if (! cctxt->simplified)
    xsltStylesheetElemDepth = cctxt->depth +1;
    else
    xsltStylesheetElemDepth = 0;
 
    if (xmlNodeGetSpacePreserve(node) != 1)
    cctxt->inode->preserveWhitespace = 0;
    else
    cctxt->inode->preserveWhitespace = 1;
 
    /*
    * Eval if we should keep the old incorrect behaviour.
    */
    strictWhitespace = (cctxt->strict != 0) ? 1 : 0;
 
    nsNameXSLT = xsltConstNamespaceNameXSLT;
 
    deleteNode = NULL;
    cur = node;
    while (cur != NULL) {
    if (deleteNode != NULL) {
 
#ifdef WITH_XSLT_DEBUG_BLANKS
        xsltGenericDebug(xsltGenericDebugContext,
         "xsltParsePreprocessStylesheetTree: removing node\n");
#endif
        xmlUnlinkNode(deleteNode);
        xmlFreeNode(deleteNode);
        deleteNode = NULL;
    }
    if (cur->type == XML_ELEMENT_NODE) {
 
        /*
        * Clear the PSVI field.
        */
        cur->psvi = NULL;
 
        xsltCompilerNodePush(cctxt, cur);
 
        inXSLText = 0;
        textNode = NULL;
        findSpaceAttr = 1;
        cctxt->inode->stripWhitespace = 0;
        /*
        * TODO: I'd love to use a string pointer comparison here :-/
        */
        if (IS_XSLT_ELEM(cur)) {
#ifdef XSLT_REFACTORED_XSLT_NSCOMP
        if (cur->ns->href != nsNameXSLT) {
            nsMapItem = xsltNewNamespaceMapItem(cctxt,
            doc, cur->ns, cur);
            if (nsMapItem == NULL)
            goto internal_err;
            cur->ns->href = nsNameXSLT;
        }
#endif
 
        if (cur->name == NULL)
            goto process_attributes;
        /*
        * Mark the XSLT element for later recognition.
        * TODO: Using the marker is still too dangerous, since if
        *   the parsing mechanism leaves out an XSLT element, then
        *   this might hit the transformation-mechanism, which
        *   will break if it doesn't expect such a marker.
        */
        /* cur->psvi = (void *) xsltXSLTElemMarker; */
 
        /*
        * XSLT 2.0: "Any whitespace text node whose parent is
        * one of the following elements is removed from the "
        * tree, regardless of any xml:space attributes:..."
        * xsl:apply-imports,
        * xsl:apply-templates,
        * xsl:attribute-set,
        * xsl:call-template,
        * xsl:choose,
        * xsl:stylesheet, xsl:transform.
        * XSLT 2.0: xsl:analyze-string,
        *           xsl:character-map,
        *           xsl:next-match
        *
        * TODO: I'd love to use a string pointer comparison here :-/
        */
        name = cur->name;
        switch (*name) {
            case 't':
            if ((name[0] == 't') && (name[1] == 'e') &&
                (name[2] == 'x') && (name[3] == 't') &&
                (name[4] == 0))
            {
                /*
                * Process the xsl:text element.
                * ----------------------------
                * Mark it for later recognition.
                */
                cur->psvi = (void *) xsltXSLTTextMarker;
                /*
                * For stylesheets, the set of
                * whitespace-preserving element names
                * consists of just xsl:text.
                */
                findSpaceAttr = 0;
                cctxt->inode->preserveWhitespace = 1;
                inXSLText = 1;
            }
            break;
            case 'c':
            if (xmlStrEqual(name, BAD_CAST "choose") ||
                xmlStrEqual(name, BAD_CAST "call-template"))
                cctxt->inode->stripWhitespace = 1;
            break;
            case 'a':
            if (xmlStrEqual(name, BAD_CAST "apply-templates") ||
                xmlStrEqual(name, BAD_CAST "apply-imports") ||
                xmlStrEqual(name, BAD_CAST "attribute-set"))
 
                cctxt->inode->stripWhitespace = 1;
            break;
            default:
            if (xsltStylesheetElemDepth == cctxt->depth) {
                /*
                * This is a xsl:stylesheet/xsl:transform.
                */
                cctxt->inode->stripWhitespace = 1;
                break;
            }
 
            if ((cur->prev != NULL) &&
                (cur->prev->type == XML_TEXT_NODE))
            {
                /*
                * XSLT 2.0 : "Any whitespace text node whose
                *  following-sibling node is an xsl:param or
                *  xsl:sort element is removed from the tree,
                *  regardless of any xml:space attributes."
                */
                if (((*name == 'p') || (*name == 's')) &&
                (xmlStrEqual(name, BAD_CAST "param") ||
                 xmlStrEqual(name, BAD_CAST "sort")))
                {
                do {
                    if (IS_BLANK_NODE(cur->prev)) {
                    txt = cur->prev;
                    xmlUnlinkNode(txt);
                    xmlFreeNode(txt);
                    } else {
                    /*
                    * This will result in a content
                    * error, when hitting the parsing
                    * functions.
                    */
                    break;
                    }
                } while (cur->prev);
                }
            }
            break;
        }
        }
 
process_attributes:
        /*
        * Process attributes.
        * ------------------
        */
        if (cur->properties != NULL) {
        if (cur->children == NULL)
            findSpaceAttr = 0;
        attr = cur->properties;
        do {
#ifdef XSLT_REFACTORED_XSLT_NSCOMP
            if ((attr->ns) && (attr->ns->href != nsNameXSLT) &&
            xmlStrEqual(attr->ns->href, nsNameXSLT))
            {
            nsMapItem = xsltNewNamespaceMapItem(cctxt,
                doc, attr->ns, cur);
            if (nsMapItem == NULL)
                goto internal_err;
            attr->ns->href = nsNameXSLT;
            }
#endif
            if (internalize) {
            /*
            * Internalize the attribute's value; the goal is to
            * speed up operations and minimize used space by
            * compiled stylesheets.
            */
            txt = attr->children;
            /*
            * NOTE that this assumes only one
            *  text-node in the attribute's content.
            */
            if ((txt != NULL) && (txt->content != NULL) &&
                (!xmlDictOwns(style->dict, txt->content)))
            {
                value = (xmlChar *) xmlDictLookup(style->dict,
                txt->content, -1);
                xmlNodeSetContent(txt, NULL);
                txt->content = value;
            }
            }
            /*
            * Process xml:space attributes.
            * ----------------------------
            */
            if ((findSpaceAttr != 0) &&
            (attr->ns != NULL) &&
            (attr->name != NULL) &&
            (attr->name[0] == 's') &&
            (attr->ns->prefix != NULL) &&
            (attr->ns->prefix[0] == 'x') &&
            (attr->ns->prefix[1] == 'm') &&
            (attr->ns->prefix[2] == 'l') &&
            (attr->ns->prefix[3] == 0))
            {
            value = xmlGetNsProp(cur, BAD_CAST "space",
                XML_XML_NAMESPACE);
            if (value != NULL) {
                if (xmlStrEqual(value, BAD_CAST "preserve")) {
                cctxt->inode->preserveWhitespace = 1;
                } else if (xmlStrEqual(value, BAD_CAST "default")) {
                cctxt->inode->preserveWhitespace = 0;
                } else {
                /* Invalid value for xml:space. */
                xsltTransformError(NULL, style, cur,
                    "Attribute xml:space: Invalid value.\n");
                cctxt->style->warnings++;
                }
                findSpaceAttr = 0;
                xmlFree(value);
            }
 
            }
            attr = attr->next;
        } while (attr != NULL);
        }
        /*
        * We'll descend into the children of element nodes only.
        */
        if (cur->children != NULL) {
        cur = cur->children;
        continue;
        }
    } else if ((cur->type == XML_TEXT_NODE) ||
        (cur->type == XML_CDATA_SECTION_NODE))
    {
        /*
        * Merge adjacent text/CDATA-section-nodes
        * ---------------------------------------
        * In order to avoid breaking of existing stylesheets,
        * if the old behaviour is wanted (strictWhitespace == 0),
        * then we *won't* merge adjacent text-nodes
        * (except in xsl:text); this will ensure that whitespace-only
        * text nodes are (incorrectly) not stripped in some cases.
        *
        * Example:               : <foo>  <!-- bar -->zoo</foo>
        * Corrent (strict) result: <foo>  zoo</foo>
        * Incorrect (old) result : <foo>zoo</foo>
        *
        * NOTE that we *will* merge adjacent text-nodes if
        * they are in xsl:text.
        * Example, the following:
        * <xsl:text>  <!-- bar -->zoo<xsl:text>
        * will result in both cases in:
        * <xsl:text>  zoo<xsl:text>
        */
        cur->type = XML_TEXT_NODE;
        if ((strictWhitespace != 0) || (inXSLText != 0)) {
        /*
        * New behaviour; merge nodes.
        */
        if (textNode == NULL)
            textNode = cur;
        else {
            if (cur->content != NULL)
            xmlNodeAddContent(textNode, cur->content);
            deleteNode = cur;
        }
        if ((cur->next == NULL) ||
            (cur->next->type == XML_ELEMENT_NODE))
            goto end_of_text;
        else
            goto next_sibling;
        } else {
        /*
        * Old behaviour.
        */
        if (textNode == NULL)
            textNode = cur;
        goto end_of_text;
        }
    } else if ((cur->type == XML_COMMENT_NODE) ||
        (cur->type == XML_PI_NODE))
    {
        /*
        * Remove processing instructions and comments.
        */
        deleteNode = cur;
        if ((cur->next == NULL) ||
        (cur->next->type == XML_ELEMENT_NODE))
        goto end_of_text;
        else
        goto next_sibling;
    } else {
        textNode = NULL;
        /*
        * Invalid node-type for this data-model.
        */
        xsltTransformError(NULL, style, cur,
        "Invalid type of node for the XSLT data model.\n");
        cctxt->style->errors++;
        goto next_sibling;
    }
 
end_of_text:
    if (textNode) {
        value = textNode->content;
        /*
        * At this point all adjacent text/CDATA-section nodes
        * have been merged.
        *
        * Strip whitespace-only text-nodes.
        * (cctxt->inode->stripWhitespace)
        */
        if ((value == NULL) || (*value == 0) ||
        (((cctxt->inode->stripWhitespace) ||
          (! cctxt->inode->preserveWhitespace)) &&
         IS_BLANK(*value) &&
         xsltIsBlank(value)))
        {
        if (textNode != cur) {
            xmlUnlinkNode(textNode);
            xmlFreeNode(textNode);
        } else
            deleteNode = textNode;
        textNode = NULL;
        goto next_sibling;
        }
        /*
        * Convert CDATA-section nodes to text-nodes.
        * TODO: Can this produce problems?
        */
        if (textNode->type != XML_TEXT_NODE) {
        textNode->type = XML_TEXT_NODE;
        textNode->name = xmlStringText;
        }
        if (internalize &&
        (textNode->content != NULL) &&
        (!xmlDictOwns(style->dict, textNode->content)))
        {
        /*
        * Internalize the string.
        */
        value = (xmlChar *) xmlDictLookup(style->dict,
            textNode->content, -1);
        xmlNodeSetContent(textNode, NULL);
        textNode->content = value;
        }
        textNode = NULL;
        /*
        * Note that "disable-output-escaping" of the xsl:text
        * element will be applied at a later level, when
        * XSLT elements are processed.
        */
    }
 
next_sibling:
    if (cur->type == XML_ELEMENT_NODE) {
        xsltCompilerNodePop(cctxt, cur);
    }
    if (cur == node)
        break;
    if (cur->next != NULL) {
        cur = cur->next;
    } else {
        cur = cur->parent;
        inXSLText = 0;
        goto next_sibling;
    };
    }
    if (deleteNode != NULL) {
#ifdef WITH_XSLT_DEBUG_PARSING
    xsltGenericDebug(xsltGenericDebugContext,
     "xsltParsePreprocessStylesheetTree: removing node\n");
#endif
    xmlUnlinkNode(deleteNode);
    xmlFreeNode(deleteNode);
    }
    return(0);
 
internal_err:
    return(-1);
}
 
#endif /* XSLT_REFACTORED */
 
#ifdef XSLT_REFACTORED
#else
static void
xsltPreprocessStylesheet(xsltStylesheetPtr style, xmlNodePtr cur)
{
    xmlNodePtr deleteNode, styleelem;
    int internalize = 0;
 
    if ((style == NULL) || (cur == NULL))
        return;
 
    if ((cur->doc != NULL) && (style->dict != NULL) &&
        (cur->doc->dict == style->dict))
    internalize = 1;
    else
        style->internalized = 0;
 
    if ((cur != NULL) && (IS_XSLT_ELEM(cur)) &&
        (IS_XSLT_NAME(cur, "stylesheet"))) {
    styleelem = cur;
    } else {
        styleelem = NULL;
    }
 
    /*
     * This content comes from the stylesheet
     * For stylesheets, the set of whitespace-preserving
     * element names consists of just xsl:text.
     */
    deleteNode = NULL;
    while (cur != NULL) {
    if (deleteNode != NULL) {
#ifdef WITH_XSLT_DEBUG_BLANKS
        xsltGenericDebug(xsltGenericDebugContext,
         "xsltPreprocessStylesheet: removing ignorable blank node\n");
#endif
        xmlUnlinkNode(deleteNode);
        xmlFreeNode(deleteNode);
        deleteNode = NULL;
    }
    if (cur->type == XML_ELEMENT_NODE) {
        int exclPrefixes;
        /*
         * Internalize attributes values.
         */
        if ((internalize) && (cur->properties != NULL)) {
            xmlAttrPtr attr = cur->properties;
        xmlNodePtr txt;
 
        while (attr != NULL) {
            txt = attr->children;
            if ((txt != NULL) && (txt->type == XML_TEXT_NODE) &&
                (txt->content != NULL) &&
            (!xmlDictOwns(style->dict, txt->content)))
            {
            xmlChar *tmp;
 
            /*
             * internalize the text string, goal is to speed
             * up operations and minimize used space by compiled
             * stylesheets.
             */
            tmp = (xmlChar *) xmlDictLookup(style->dict,
                                            txt->content, -1);
            if (tmp != txt->content) {
                xmlNodeSetContent(txt, NULL);
                txt->content = tmp;
            }
            }
            attr = attr->next;
        }
        }
        if (IS_XSLT_ELEM(cur)) {
        exclPrefixes = 0;
        if (IS_XSLT_NAME(cur, "text")) {
            for (;exclPrefixes > 0;exclPrefixes--)
            exclPrefixPop(style);
            goto skip_children;
        }
        } else {
        exclPrefixes = xsltParseStylesheetExcludePrefix(style, cur, 0);
        }
 
        if ((cur->nsDef != NULL) && (style->exclPrefixNr > 0)) {
        xmlNsPtr ns = cur->nsDef, prev = NULL, next;
        xmlNodePtr root = NULL;
        int i, moved;
 
        root = xmlDocGetRootElement(cur->doc);
        if ((root != NULL) && (root != cur)) {
            while (ns != NULL) {
            moved = 0;
            next = ns->next;
            for (i = 0;i < style->exclPrefixNr;i++) {
                if ((ns->prefix != NULL) &&
                    (xmlStrEqual(ns->href,
                         style->exclPrefixTab[i]))) {
                /*
                 * Move the namespace definition on the root
                 * element to avoid duplicating it without
                 * loosing it.
                 */
                if (prev == NULL) {
                    cur->nsDef = ns->next;
                } else {
                    prev->next = ns->next;
                }
                ns->next = root->nsDef;
                root->nsDef = ns;
                moved = 1;
                break;
                }
            }
            if (moved == 0)
                prev = ns;
            ns = next;
            }
        }
        }
        /*
         * If we have prefixes locally, recurse and pop them up when
         * going back
         */
        if (exclPrefixes > 0) {
        xsltPreprocessStylesheet(style, cur->children);
        for (;exclPrefixes > 0;exclPrefixes--)
            exclPrefixPop(style);
        goto skip_children;
        }
    } else if (cur->type == XML_TEXT_NODE) {
        if (IS_BLANK_NODE(cur)) {
        if (xmlNodeGetSpacePreserve(cur->parent) != 1) {
            deleteNode = cur;
        }
        } else if ((cur->content != NULL) && (internalize) &&
                   (!xmlDictOwns(style->dict, cur->content))) {
        xmlChar *tmp;
 
        /*
         * internalize the text string, goal is to speed
         * up operations and minimize used space by compiled
         * stylesheets.
         */
        tmp = (xmlChar *) xmlDictLookup(style->dict, cur->content, -1);
        xmlNodeSetContent(cur, NULL);
        cur->content = tmp;
        }
    } else if ((cur->type != XML_ELEMENT_NODE) &&
           (cur->type != XML_CDATA_SECTION_NODE)) {
        deleteNode = cur;
        goto skip_children;
    }
 
    /*
     * Skip to next node. In case of a namespaced element children of
     * the stylesheet and not in the XSLT namespace and not an extension
     * element, ignore its content.
     */
    if ((cur->type == XML_ELEMENT_NODE) && (cur->ns != NULL) &&
        (styleelem != NULL) && (cur->parent == styleelem) &&
        (!xmlStrEqual(cur->ns->href, XSLT_NAMESPACE)) &&
        (!xsltCheckExtURI(style, cur->ns->href))) {
        goto skip_children;
    } else if (cur->children != NULL) {
        cur = cur->children;
        continue;
    }
 
skip_children:
    if (cur->next != NULL) {
        cur = cur->next;
        continue;
    }
    do {
 
        cur = cur->parent;
        if (cur == NULL)
        break;
        if (cur == (xmlNodePtr) style->doc) {
        cur = NULL;
        break;
        }
        if (cur->next != NULL) {
        cur = cur->next;
        break;
        }
    } while (cur != NULL);
    }
    if (deleteNode != NULL) {
#ifdef WITH_XSLT_DEBUG_PARSING
    xsltGenericDebug(xsltGenericDebugContext,
     "xsltPreprocessStylesheet: removing ignorable blank node\n");
#endif
    xmlUnlinkNode(deleteNode);
    xmlFreeNode(deleteNode);
    }
}
#endif /* end of else XSLT_REFACTORED */
 
static void
xsltGatherNamespaces(xsltStylesheetPtr style) {
    xmlNodePtr cur;
    const xmlChar *URI;
 
    if (style == NULL)
        return;
    /*
     * TODO: basically if the stylesheet uses the same prefix for different
     *       patterns, well they may be in problem, hopefully they will get
     *       a warning first.
     */
    /*
    * TODO: Eliminate the use of the hash for XPath expressions.
    *   An expression should be evaluated in the context of the in-scope
    *   namespaces; eliminate the restriction of an XML document to contain
    *   no duplicate prefixes for different namespace names.
    *
    */
    cur = xmlDocGetRootElement(style->doc);
    while (cur != NULL) {
    if (cur->type == XML_ELEMENT_NODE) {
        xmlNsPtr ns = cur->nsDef;
        while (ns != NULL) {
        if (ns->prefix != NULL) {
            if (style->nsHash == NULL) {
            style->nsHash = xmlHashCreate(10);
            if (style->nsHash == NULL) {
                xsltTransformError(NULL, style, cur,
         "xsltGatherNamespaces: failed to create hash table\n");
                style->errors++;
                return;
            }
            }
            URI = xmlHashLookup(style->nsHash, ns->prefix);
            if ((URI != NULL) && (!xmlStrEqual(URI, ns->href))) {
            xsltTransformError(NULL, style, cur,
         "Namespaces prefix %s used for multiple namespaces\n",ns->prefix);
            style->warnings++;
            } else if (URI == NULL) {
            xmlHashUpdateEntry(style->nsHash, ns->prefix,
                (void *) ns->href, NULL);
 
#ifdef WITH_XSLT_DEBUG_PARSING
            xsltGenericDebug(xsltGenericDebugContext,
         "Added namespace: %s mapped to %s\n", ns->prefix, ns->href);
#endif
            }
        }
        ns = ns->next;
        }
    }
 
    /*
     * Skip to next node
     */
    if (cur->children != NULL) {
        if (cur->children->type != XML_ENTITY_DECL) {
        cur = cur->children;
        continue;
        }
    }
    if (cur->next != NULL) {
        cur = cur->next;
        continue;
    }
 
    do {
        cur = cur->parent;
        if (cur == NULL)
        break;
        if (cur == (xmlNodePtr) style->doc) {
        cur = NULL;
        break;
        }
        if (cur->next != NULL) {
        cur = cur->next;
        break;
        }
    } while (cur != NULL);
    }
}
 
#ifdef XSLT_REFACTORED
 
static xsltStyleType
xsltGetXSLTElementTypeByNode(xsltCompilerCtxtPtr cctxt,
                 xmlNodePtr node)
{
    if ((node == NULL) || (node->type != XML_ELEMENT_NODE) ||
    (node->name == NULL))
    return(0);
 
    if (node->name[0] == 'a') {
    if (IS_XSLT_NAME(node, "apply-templates"))
        return(XSLT_FUNC_APPLYTEMPLATES);
    else if (IS_XSLT_NAME(node, "attribute"))
        return(XSLT_FUNC_ATTRIBUTE);
    else if (IS_XSLT_NAME(node, "apply-imports"))
        return(XSLT_FUNC_APPLYIMPORTS);
    else if (IS_XSLT_NAME(node, "attribute-set"))
        return(0);
 
    } else if (node->name[0] == 'c') {
    if (IS_XSLT_NAME(node, "choose"))
        return(XSLT_FUNC_CHOOSE);
    else if (IS_XSLT_NAME(node, "copy"))
        return(XSLT_FUNC_COPY);
    else if (IS_XSLT_NAME(node, "copy-of"))
        return(XSLT_FUNC_COPYOF);
    else if (IS_XSLT_NAME(node, "call-template"))
        return(XSLT_FUNC_CALLTEMPLATE);
    else if (IS_XSLT_NAME(node, "comment"))
        return(XSLT_FUNC_COMMENT);
 
    } else if (node->name[0] == 'd') {
    if (IS_XSLT_NAME(node, "document"))
        return(XSLT_FUNC_DOCUMENT);
    else if (IS_XSLT_NAME(node, "decimal-format"))
        return(0);
 
    } else if (node->name[0] == 'e') {
    if (IS_XSLT_NAME(node, "element"))
        return(XSLT_FUNC_ELEMENT);
 
    } else if (node->name[0] == 'f') {
    if (IS_XSLT_NAME(node, "for-each"))
        return(XSLT_FUNC_FOREACH);
    else if (IS_XSLT_NAME(node, "fallback"))
        return(XSLT_FUNC_FALLBACK);
 
    } else if (*(node->name) == 'i') {
    if (IS_XSLT_NAME(node, "if"))
        return(XSLT_FUNC_IF);
    else if (IS_XSLT_NAME(node, "include"))
        return(0);
    else if (IS_XSLT_NAME(node, "import"))
        return(0);
 
    } else if (*(node->name) == 'k') {
    if (IS_XSLT_NAME(node, "key"))
        return(0);
 
    } else if (*(node->name) == 'm') {
    if (IS_XSLT_NAME(node, "message"))
        return(XSLT_FUNC_MESSAGE);
 
    } else if (*(node->name) == 'n') {
    if (IS_XSLT_NAME(node, "number"))
        return(XSLT_FUNC_NUMBER);
    else if (IS_XSLT_NAME(node, "namespace-alias"))
        return(0);
 
    } else if (*(node->name) == 'o') {
    if (IS_XSLT_NAME(node, "otherwise"))
        return(XSLT_FUNC_OTHERWISE);
    else if (IS_XSLT_NAME(node, "output"))
        return(0);
 
    } else if (*(node->name) == 'p') {
    if (IS_XSLT_NAME(node, "param"))
        return(XSLT_FUNC_PARAM);
    else if (IS_XSLT_NAME(node, "processing-instruction"))
        return(XSLT_FUNC_PI);
    else if (IS_XSLT_NAME(node, "preserve-space"))
        return(0);
 
    } else if (*(node->name) == 's') {
    if (IS_XSLT_NAME(node, "sort"))
        return(XSLT_FUNC_SORT);
    else if (IS_XSLT_NAME(node, "strip-space"))
        return(0);
    else if (IS_XSLT_NAME(node, "stylesheet"))
        return(0);
 
    } else if (node->name[0] == 't') {
    if (IS_XSLT_NAME(node, "text"))
        return(XSLT_FUNC_TEXT);
    else if (IS_XSLT_NAME(node, "template"))
        return(0);
    else if (IS_XSLT_NAME(node, "transform"))
        return(0);
 
    } else if (*(node->name) == 'v') {
    if (IS_XSLT_NAME(node, "value-of"))
        return(XSLT_FUNC_VALUEOF);
    else if (IS_XSLT_NAME(node, "variable"))
        return(XSLT_FUNC_VARIABLE);
 
    } else if (*(node->name) == 'w') {
    if (IS_XSLT_NAME(node, "when"))
        return(XSLT_FUNC_WHEN);
    if (IS_XSLT_NAME(node, "with-param"))
        return(XSLT_FUNC_WITHPARAM);
    }
    return(0);
}
 
int
xsltParseAnyXSLTElem(xsltCompilerCtxtPtr cctxt, xmlNodePtr elem)
{
    if ((cctxt == NULL) || (elem == NULL) ||
    (elem->type != XML_ELEMENT_NODE))
    return(-1);
 
    elem->psvi = NULL;
 
    if (! (IS_XSLT_ELEM_FAST(elem)))
    return(-1);
    /*
    * Detection of handled content of extension instructions.
    */
    if (cctxt->inode->category == XSLT_ELEMENT_CATEGORY_EXTENSION) {
    cctxt->inode->extContentHandled = 1;
    }
 
    xsltCompilerNodePush(cctxt, elem);
    /*
    * URGENT TODO: Find a way to speed up this annoying redundant
    *  textual node-name and namespace comparison.
    */
    if (cctxt->inode->prev->curChildType != 0)
    cctxt->inode->type = cctxt->inode->prev->curChildType;
    else
    cctxt->inode->type = xsltGetXSLTElementTypeByNode(cctxt, elem);
    /*
    * Update the in-scope namespaces if needed.
    */
    if (elem->nsDef != NULL)
    cctxt->inode->inScopeNs =
        xsltCompilerBuildInScopeNsList(cctxt, elem);
    /*
    * xsltStylePreCompute():
    *  This will compile the information found on the current
    *  element's attributes. NOTE that this won't process the
    *  children of the instruction.
    */
    xsltStylePreCompute(cctxt->style, elem);
    /*
    * TODO: How to react on errors in xsltStylePreCompute() ?
    */
 
    /*
    * Validate the content model of the XSLT-element.
    */
    switch (cctxt->inode->type) {
    case XSLT_FUNC_APPLYIMPORTS:
        /* EMPTY */
        goto empty_content;
    case XSLT_FUNC_APPLYTEMPLATES:
        /* <!-- Content: (xsl:sort | xsl:with-param)* --> */
        goto apply_templates;
    case XSLT_FUNC_ATTRIBUTE:
        /* <!-- Content: template --> */
        goto sequence_constructor;
    case XSLT_FUNC_CALLTEMPLATE:
        /* <!-- Content: xsl:with-param* --> */
        goto call_template;
    case XSLT_FUNC_CHOOSE:
        /* <!-- Content: (xsl:when+, xsl:otherwise?) --> */
        goto choose;
    case XSLT_FUNC_COMMENT:
        /* <!-- Content: template --> */
        goto sequence_constructor;
    case XSLT_FUNC_COPY:
        /* <!-- Content: template --> */
        goto sequence_constructor;
    case XSLT_FUNC_COPYOF:
        /* EMPTY */
        goto empty_content;
    case XSLT_FUNC_DOCUMENT: /* Extra one */
        /* ?? template ?? */
        goto sequence_constructor;
    case XSLT_FUNC_ELEMENT:
        /* <!-- Content: template --> */
        goto sequence_constructor;
    case XSLT_FUNC_FALLBACK:
        /* <!-- Content: template --> */
        goto sequence_constructor;
    case XSLT_FUNC_FOREACH:
        /* <!-- Content: (xsl:sort*, template) --> */
        goto for_each;
    case XSLT_FUNC_IF:
        /* <!-- Content: template --> */
        goto sequence_constructor;
    case XSLT_FUNC_OTHERWISE:
        /* <!-- Content: template --> */
        goto sequence_constructor;
    case XSLT_FUNC_MESSAGE:
        /* <!-- Content: template --> */
        goto sequence_constructor;
    case XSLT_FUNC_NUMBER:
        /* EMPTY */
        goto empty_content;
    case XSLT_FUNC_PARAM:
        /*
        * Check for redefinition.
        */
        if ((elem->psvi != NULL) && (cctxt->ivar != NULL)) {
        xsltVarInfoPtr ivar = cctxt->ivar;
 
        do {
            if ((ivar->name ==
             ((xsltStyleItemParamPtr) elem->psvi)->name) &&
            (ivar->nsName ==
             ((xsltStyleItemParamPtr) elem->psvi)->ns))
            {
            elem->psvi = NULL;
            xsltTransformError(NULL, cctxt->style, elem,
                "Redefinition of variable or parameter '%s'.\n",
                ivar->name);
            cctxt->style->errors++;
            goto error;
            }
            ivar = ivar->prev;
        } while (ivar != NULL);
        }
        /*  <!-- Content: template --> */
        goto sequence_constructor;
    case XSLT_FUNC_PI:
        /*  <!-- Content: template --> */
        goto sequence_constructor;
    case XSLT_FUNC_SORT:
        /* EMPTY */
        goto empty_content;
    case XSLT_FUNC_TEXT:
        /* <!-- Content: #PCDATA --> */
        goto text;
    case XSLT_FUNC_VALUEOF:
        /* EMPTY */
        goto empty_content;
    case XSLT_FUNC_VARIABLE:
        /*
        * Check for redefinition.
        */
        if ((elem->psvi != NULL) && (cctxt->ivar != NULL)) {
        xsltVarInfoPtr ivar = cctxt->ivar;
 
        do {
            if ((ivar->name ==
             ((xsltStyleItemVariablePtr) elem->psvi)->name) &&
            (ivar->nsName ==
             ((xsltStyleItemVariablePtr) elem->psvi)->ns))
            {
            elem->psvi = NULL;
            xsltTransformError(NULL, cctxt->style, elem,
                "Redefinition of variable or parameter '%s'.\n",
                ivar->name);
            cctxt->style->errors++;
            goto error;
            }
            ivar = ivar->prev;
        } while (ivar != NULL);
        }
        /* <!-- Content: template --> */
        goto sequence_constructor;
    case XSLT_FUNC_WHEN:
        /* <!-- Content: template --> */
        goto sequence_constructor;
    case XSLT_FUNC_WITHPARAM:
        /* <!-- Content: template --> */
        goto sequence_constructor;
    default:
#ifdef WITH_XSLT_DEBUG_PARSING
        xsltGenericDebug(xsltGenericDebugContext,
        "xsltParseXSLTNode: Unhandled XSLT element '%s'.\n",
        elem->name);
#endif
        xsltTransformError(NULL, cctxt->style, elem,
        "xsltParseXSLTNode: Internal error; "
        "unhandled XSLT element '%s'.\n", elem->name);
        cctxt->style->errors++;
        goto internal_err;
    }
 
apply_templates:
    /* <!-- Content: (xsl:sort | xsl:with-param)* --> */
    if (elem->children != NULL) {
    xmlNodePtr child = elem->children;
    do {
        if (child->type == XML_ELEMENT_NODE) {
        if (IS_XSLT_ELEM_FAST(child)) {
            if (xmlStrEqual(child->name, BAD_CAST "with-param")) {
            cctxt->inode->curChildType = XSLT_FUNC_WITHPARAM;
            xsltParseAnyXSLTElem(cctxt, child);
            } else if (xmlStrEqual(child->name, BAD_CAST "sort")) {
            cctxt->inode->curChildType = XSLT_FUNC_SORT;
            xsltParseAnyXSLTElem(cctxt, child);
            } else
            xsltParseContentError(cctxt->style, child);
        } else
            xsltParseContentError(cctxt->style, child);
        }
        child = child->next;
    } while (child != NULL);
    }
    goto exit;
 
call_template:
    /* <!-- Content: xsl:with-param* --> */
    if (elem->children != NULL) {
    xmlNodePtr child = elem->children;
    do {
        if (child->type == XML_ELEMENT_NODE) {
        if (IS_XSLT_ELEM_FAST(child)) {
            xsltStyleType type;
 
            type = xsltGetXSLTElementTypeByNode(cctxt, child);
            if (type == XSLT_FUNC_WITHPARAM) {
            cctxt->inode->curChildType = XSLT_FUNC_WITHPARAM;
            xsltParseAnyXSLTElem(cctxt, child);
            } else {
            xsltParseContentError(cctxt->style, child);
            }
        } else
            xsltParseContentError(cctxt->style, child);
        }
        child = child->next;
    } while (child != NULL);
    }
    goto exit;
 
text:
    if (elem->children != NULL) {
    xmlNodePtr child = elem->children;
    do {
        if ((child->type != XML_TEXT_NODE) &&
        (child->type != XML_CDATA_SECTION_NODE))
        {
        xsltTransformError(NULL, cctxt->style, elem,
            "The XSLT 'text' element must have only character "
            "data as content.\n");
        }
        child = child->next;
    } while (child != NULL);
    }
    goto exit;
 
empty_content:
    if (elem->children != NULL) {
    xmlNodePtr child = elem->children;
    /*
    * Relaxed behaviour: we will allow whitespace-only text-nodes.
    */
    do {
        if (((child->type != XML_TEXT_NODE) &&
         (child->type != XML_CDATA_SECTION_NODE)) ||
        (! IS_BLANK_NODE(child)))
        {
        xsltTransformError(NULL, cctxt->style, elem,
            "This XSLT element must have no content.\n");
        cctxt->style->errors++;
        break;
        }
        child = child->next;
    } while (child != NULL);
    }
    goto exit;
 
choose:
    /* <!-- Content: (xsl:when+, xsl:otherwise?) --> */
    /*
    * TODO: text-nodes in between are *not* allowed in XSLT 1.0.
    *   The old behaviour did not check this.
    * NOTE: In XSLT 2.0 they are stripped beforehand
    *  if whitespace-only (regardless of xml:space).
    */
    if (elem->children != NULL) {
    xmlNodePtr child = elem->children;
    int nbWhen = 0, nbOtherwise = 0, err = 0;
    do {
        if (child->type == XML_ELEMENT_NODE) {
        if (IS_XSLT_ELEM_FAST(child)) {
            xsltStyleType type;
 
            type = xsltGetXSLTElementTypeByNode(cctxt, child);
            if (type == XSLT_FUNC_WHEN) {
            nbWhen++;
            if (nbOtherwise) {
                xsltParseContentError(cctxt->style, child);
                err = 1;
                break;
            }
            cctxt->inode->curChildType = XSLT_FUNC_WHEN;
            xsltParseAnyXSLTElem(cctxt, child);
            } else if (type == XSLT_FUNC_OTHERWISE) {
            if (! nbWhen) {
                xsltParseContentError(cctxt->style, child);
                err = 1;
                break;
            }
            if (nbOtherwise) {
                xsltTransformError(NULL, cctxt->style, elem,
                "The XSLT 'choose' element must not contain "
                "more than one XSLT 'otherwise' element.\n");
                cctxt->style->errors++;
                err = 1;
                break;
            }
            nbOtherwise++;
            cctxt->inode->curChildType = XSLT_FUNC_OTHERWISE;
            xsltParseAnyXSLTElem(cctxt, child);
            } else
            xsltParseContentError(cctxt->style, child);
        } else
            xsltParseContentError(cctxt->style, child);
        }
        /*
        else
            xsltParseContentError(cctxt, child);
        */
        child = child->next;
    } while (child != NULL);
    if ((! err) && (! nbWhen)) {
        xsltTransformError(NULL, cctxt->style, elem,
        "The XSLT element 'choose' must contain at least one "
        "XSLT element 'when'.\n");
        cctxt->style->errors++;
    }
    }
    goto exit;
 
for_each:
    /* <!-- Content: (xsl:sort*, template) --> */
    /*
    * NOTE: Text-nodes before xsl:sort are *not* allowed in XSLT 1.0.
    *   The old behaviour did not allow this, but it catched this
    *   only at transformation-time.
    *   In XSLT 2.0 they are stripped beforehand if whitespace-only
    *   (regardless of xml:space).
    */
    if (elem->children != NULL) {
    xmlNodePtr child = elem->children;
    /*
    * Parse xsl:sort first.
    */
    do {
        if ((child->type == XML_ELEMENT_NODE) &&
        IS_XSLT_ELEM_FAST(child))
        {
        if (xsltGetXSLTElementTypeByNode(cctxt, child) ==
            XSLT_FUNC_SORT)
        {
            cctxt->inode->curChildType = XSLT_FUNC_SORT;
            xsltParseAnyXSLTElem(cctxt, child);
        } else
            break;
        } else
        break;
        child = child->next;
    } while (child != NULL);
    /*
    * Parse the sequece constructor.
    */
    if (child != NULL)
        xsltParseSequenceConstructor(cctxt, child);
    }
    goto exit;
 
sequence_constructor:
    /*
    * Parse the sequence constructor.
    */
    if (elem->children != NULL)
    xsltParseSequenceConstructor(cctxt, elem->children);
 
    /*
    * Register information for vars/params. Only needed if there
    * are any following siblings.
    */
    if ((elem->next != NULL) &&
    ((cctxt->inode->type == XSLT_FUNC_VARIABLE) ||
     (cctxt->inode->type == XSLT_FUNC_PARAM)))
    {
    if ((elem->psvi != NULL) &&
        (((xsltStyleBasicItemVariablePtr) elem->psvi)->name))
    {
        xsltCompilerVarInfoPush(cctxt, elem,
        ((xsltStyleBasicItemVariablePtr) elem->psvi)->name,
        ((xsltStyleBasicItemVariablePtr) elem->psvi)->ns);
    }
    }
 
error:
exit:
    xsltCompilerNodePop(cctxt, elem);
    return(0);
 
internal_err:
    xsltCompilerNodePop(cctxt, elem);
    return(-1);
}
 
static xsltStyleItemUknownPtr
xsltForwardsCompatUnkownItemCreate(xsltCompilerCtxtPtr cctxt)
{
    xsltStyleItemUknownPtr item;
 
    item = (xsltStyleItemUknownPtr) xmlMalloc(sizeof(xsltStyleItemUknown));
    if (item == NULL) {
    xsltTransformError(NULL, cctxt->style, NULL,
        "Internal error in xsltForwardsCompatUnkownItemCreate(): "
        "Failed to allocate memory.\n");
    cctxt->style->errors++;
    return(NULL);
    }
    memset(item, 0, sizeof(xsltStyleItemUknown));
    item->type = XSLT_FUNC_UNKOWN_FORWARDS_COMPAT;
    /*
    * Store it in the stylesheet.
    */
    item->next = cctxt->style->preComps;
    cctxt->style->preComps = (xsltElemPreCompPtr) item;
    return(item);
}
 
static int
xsltParseUnknownXSLTElem(xsltCompilerCtxtPtr cctxt,
                xmlNodePtr node)
{
    if ((cctxt == NULL) || (node == NULL) || (node->type != XML_ELEMENT_NODE))
    return(-1);
 
    /*
    * Detection of handled content of extension instructions.
    */
    if (cctxt->inode->category == XSLT_ELEMENT_CATEGORY_EXTENSION) {
    cctxt->inode->extContentHandled = 1;
    }
    if (cctxt->inode->forwardsCompat == 0) {
    /*
    * We are not in forwards-compatible mode, so raise an error.
    */
    xsltTransformError(NULL, cctxt->style, node,
        "Unknown XSLT element '%s'.\n", node->name);
    cctxt->style->errors++;
    return(1);
    }
    /*
    * Forwards-compatible mode.
    * ------------------------
    *
    * Parse/compile xsl:fallback elements.
    *
    * QUESTION: Do we have to raise an error if there's no xsl:fallback?
    * ANSWER: No, since in the stylesheet the fallback behaviour might
    *  also be provided by using the XSLT function "element-available".
    */
    if (cctxt->unknownItem == NULL) {
    /*
    * Create a singleton for all unknown XSLT instructions.
    */
    cctxt->unknownItem = xsltForwardsCompatUnkownItemCreate(cctxt);
    if (cctxt->unknownItem == NULL) {
        node->psvi = NULL;
        return(-1);
    }
    }
    node->psvi = cctxt->unknownItem;
    if (node->children == NULL)
    return(0);
    else {
    xmlNodePtr child = node->children;
 
    xsltCompilerNodePush(cctxt, node);
    /*
    * Update the in-scope namespaces if needed.
    */
    if (node->nsDef != NULL)
        cctxt->inode->inScopeNs =
        xsltCompilerBuildInScopeNsList(cctxt, node);
    /*
    * Parse all xsl:fallback children.
    */
    do {
        if ((child->type == XML_ELEMENT_NODE) &&
        IS_XSLT_ELEM_FAST(child) &&
        IS_XSLT_NAME(child, "fallback"))
        {
        cctxt->inode->curChildType = XSLT_FUNC_FALLBACK;
        xsltParseAnyXSLTElem(cctxt, child);
        }
        child = child->next;
    } while (child != NULL);
 
    xsltCompilerNodePop(cctxt, node);
    }
    return(0);
}
 
void
xsltParseSequenceConstructor(xsltCompilerCtxtPtr cctxt, xmlNodePtr cur)
{
    xsltStyleType type;
    xmlNodePtr deleteNode = NULL;
 
    if (cctxt == NULL) {
    xmlGenericError(xmlGenericErrorContext,
        "xsltParseSequenceConstructor: Bad arguments\n");
    cctxt->style->errors++;
    return;
    }
    /*
    * Detection of handled content of extension instructions.
    */
    if (cctxt->inode->category == XSLT_ELEMENT_CATEGORY_EXTENSION) {
    cctxt->inode->extContentHandled = 1;
    }
    if ((cur == NULL) || (cur->type == XML_NAMESPACE_DECL))
    return;
    /*
    * This is the content reffered to as a "template".
    * E.g. an xsl:element has such content model:
    * <xsl:element
    *   name = { qname }
    *   namespace = { uri-reference }
    *   use-attribute-sets = qnames>
    * <!-- Content: template -->
    *
    * NOTE that in XSLT-2 the term "template" was abandoned due to
    *  confusion with xsl:template and the term "sequence constructor"
    *  was introduced instead.
    *
    * The following XSLT-instructions are allowed to appear:
    *  xsl:apply-templates, xsl:call-template, xsl:apply-imports,
    *  xsl:for-each, xsl:value-of, xsl:copy-of, xsl:number,
    *  xsl:choose, xsl:if, xsl:text, xsl:copy, xsl:variable,
    *  xsl:message, xsl:fallback,
    *  xsl:processing-instruction, xsl:comment, xsl:element
    *  xsl:attribute.
    * Additional allowed content:
    * 1) extension instructions
    * 2) literal result elements
    * 3) PCDATA
    *
    * NOTE that this content model does *not* allow xsl:param.
    */
    while (cur != NULL) {
    if (deleteNode != NULL) {
#ifdef WITH_XSLT_DEBUG_BLANKS
        xsltGenericDebug(xsltGenericDebugContext,
         "xsltParseSequenceConstructor: removing xsl:text element\n");
#endif
        xmlUnlinkNode(deleteNode);
        xmlFreeNode(deleteNode);
        deleteNode = NULL;
    }
    if (cur->type == XML_ELEMENT_NODE) {
 
        if (cur->psvi == xsltXSLTTextMarker) {
        /*
        * xsl:text elements
        * --------------------------------------------------------
        */
        xmlNodePtr tmp;
 
        cur->psvi = NULL;
        /*
        * Mark the xsl:text element for later deletion.
        */
        deleteNode = cur;
        /*
        * Validate content.
        */
        tmp = cur->children;
        if (tmp) {
            /*
            * We don't expect more than one text-node in the
            * content, since we already merged adjacent
            * text/CDATA-nodes and eliminated PI/comment-nodes.
            */
            if ((tmp->type == XML_TEXT_NODE) ||
            (tmp->next == NULL))
            {
            /*
            * Leave the contained text-node in the tree.
            */
            xmlUnlinkNode(tmp);
            xmlAddPrevSibling(cur, tmp);
            } else {
            tmp = NULL;
            xsltTransformError(NULL, cctxt->style, cur,
                "Element 'xsl:text': Invalid type "
                "of node found in content.\n");
            cctxt->style->errors++;
            }
        }
        if (cur->properties) {
            xmlAttrPtr attr;
            /*
            * TODO: We need to report errors for
            *  invalid attrs.
            */
            attr = cur->properties;
            do {
            if ((attr->ns == NULL) &&
                (attr->name != NULL) &&
                (attr->name[0] == 'd') &&
                xmlStrEqual(attr->name,
                BAD_CAST "disable-output-escaping"))
            {
                /*
                * Attr "disable-output-escaping".
                * XSLT-2: This attribute is deprecated.
                */
                if ((attr->children != NULL) &&
                xmlStrEqual(attr->children->content,
                BAD_CAST "yes"))
                {
                /*
                * Disable output escaping for this
                * text node.
                */
                if (tmp)
                    tmp->name = xmlStringTextNoenc;
                } else if ((attr->children == NULL) ||
                (attr->children->content == NULL) ||
                (!xmlStrEqual(attr->children->content,
                BAD_CAST "no")))
                {
                xsltTransformError(NULL, cctxt->style,
                    cur,
                    "Attribute 'disable-output-escaping': "
                    "Invalid value. Expected is "
                    "'yes' or 'no'.\n");
                cctxt->style->errors++;
                }
                break;
            }
            attr = attr->next;
            } while (attr != NULL);
        }
        } else if (IS_XSLT_ELEM_FAST(cur)) {
        /*
        * TODO: Using the XSLT-marker is still not stable yet.
        */
        /* if (cur->psvi == xsltXSLTElemMarker) { */
        /*
        * XSLT instructions
        * --------------------------------------------------------
        */
        cur->psvi = NULL;
        type = xsltGetXSLTElementTypeByNode(cctxt, cur);
        switch (type) {
            case XSLT_FUNC_APPLYIMPORTS:
            case XSLT_FUNC_APPLYTEMPLATES:
            case XSLT_FUNC_ATTRIBUTE:
            case XSLT_FUNC_CALLTEMPLATE:
            case XSLT_FUNC_CHOOSE:
            case XSLT_FUNC_COMMENT:
            case XSLT_FUNC_COPY:
            case XSLT_FUNC_COPYOF:
            case XSLT_FUNC_DOCUMENT: /* Extra one */
            case XSLT_FUNC_ELEMENT:
            case XSLT_FUNC_FALLBACK:
            case XSLT_FUNC_FOREACH:
            case XSLT_FUNC_IF:
            case XSLT_FUNC_MESSAGE:
            case XSLT_FUNC_NUMBER:
            case XSLT_FUNC_PI:
            case XSLT_FUNC_TEXT:
            case XSLT_FUNC_VALUEOF:
            case XSLT_FUNC_VARIABLE:
            /*
            * Parse the XSLT element.
            */
            cctxt->inode->curChildType = type;
            xsltParseAnyXSLTElem(cctxt, cur);
            break;
            default:
            xsltParseUnknownXSLTElem(cctxt, cur);
            cur = cur->next;
            continue;
        }
        } else {
        /*
        * Non-XSLT elements
        * -----------------
        */
        xsltCompilerNodePush(cctxt, cur);
        /*
        * Update the in-scope namespaces if needed.
        */
        if (cur->nsDef != NULL)
            cctxt->inode->inScopeNs =
            xsltCompilerBuildInScopeNsList(cctxt, cur);
        /*
        * The current element is either a literal result element
        * or an extension instruction.
        *
        * Process attr "xsl:extension-element-prefixes".
        * FUTURE TODO: IIRC in XSLT 2.0 this attribute must be
        * processed by the implementor of the extension function;
        * i.e., it won't be handled by the XSLT processor.
        */
        /* SPEC 1.0:
        *   "exclude-result-prefixes" is only allowed on literal
        *   result elements and "xsl:exclude-result-prefixes"
        *   on xsl:stylesheet/xsl:transform.
        * SPEC 2.0:
        *   "There are a number of standard attributes
        *   that may appear on any XSLT element: specifically
        *   version, exclude-result-prefixes,
        *   extension-element-prefixes, xpath-default-namespace,
        *   default-collation, and use-when."
        *
        * SPEC 2.0:
        *   For literal result elements:
        *   "xsl:version, xsl:exclude-result-prefixes,
        *    xsl:extension-element-prefixes,
        *    xsl:xpath-default-namespace,
        *    xsl:default-collation, or xsl:use-when."
        */
        if (cur->properties)
            cctxt->inode->extElemNs =
            xsltParseExtElemPrefixes(cctxt,
                cur, cctxt->inode->extElemNs,
                XSLT_ELEMENT_CATEGORY_LRE);
        /*
        * Eval if we have an extension instruction here.
        */
        if ((cur->ns != NULL) &&
            (cctxt->inode->extElemNs != NULL) &&
            (xsltCheckExtPrefix(cctxt->style, cur->ns->href) == 1))
        {
            /*
            * Extension instructions
            * ----------------------------------------------------
            * Mark the node information.
            */
            cctxt->inode->category = XSLT_ELEMENT_CATEGORY_EXTENSION;
            cctxt->inode->extContentHandled = 0;
            if (cur->psvi != NULL) {
            cur->psvi = NULL;
            /*
            * TODO: Temporary sanity check.
            */
            xsltTransformError(NULL, cctxt->style, cur,
                "Internal error in xsltParseSequenceConstructor(): "
                "Occupied PSVI field.\n");
            cctxt->style->errors++;
            cur = cur->next;
            continue;
            }
            cur->psvi = (void *)
            xsltPreComputeExtModuleElement(cctxt->style, cur);
 
            if (cur->psvi == NULL) {
            /*
            * OLD COMMENT: "Unknown element, maybe registered
            *  at the context level. Mark it for later
            *  recognition."
            * QUESTION: What does the xsltExtMarker mean?
            *  ANSWER: It is used in
            *   xsltApplySequenceConstructor() at
            *   transformation-time to look out for extension
            *   registered in the transformation context.
            */
            cur->psvi = (void *) xsltExtMarker;
            }
            /*
            * BIG NOTE: Now the ugly part. In previous versions
            *  of Libxslt (until 1.1.16), all the content of an
            *  extension instruction was processed and compiled without
            *  the need of the extension-author to explicitely call
            *  such a processing;.We now need to mimic this old
            *  behaviour in order to avoid breaking old code
            *  on the extension-author's side.
            * The mechanism:
            *  1) If the author does *not* set the
            *    compile-time-flag @extContentHandled, then we'll
            *    parse the content assuming that it's a "template"
            *    (or "sequence constructor in XSLT 2.0 terms).
            *    NOTE: If the extension is registered at
            *    transformation-time only, then there's no way of
            *    knowing that content shall be valid, and we'll
            *    process the content the same way.
            *  2) If the author *does* set the flag, then we'll assume
            *   that the author has handled the parsing him/herself
            *   (e.g. called xsltParseSequenceConstructor(), etc.
            *   explicitely in his/her code).
            */
            if ((cur->children != NULL) &&
            (cctxt->inode->extContentHandled == 0))
            {
            /*
            * Default parsing of the content using the
            * sequence-constructor model.
            */
            xsltParseSequenceConstructor(cctxt, cur->children);
            }
        } else {
            /*
            * Literal result element
            * ----------------------------------------------------
            * Allowed XSLT attributes:
            *  xsl:extension-element-prefixes CDATA #IMPLIED
            *  xsl:exclude-result-prefixes CDATA #IMPLIED
            *  TODO: xsl:use-attribute-sets %qnames; #IMPLIED
            *  xsl:version NMTOKEN #IMPLIED
            */
            cur->psvi = NULL;
            cctxt->inode->category = XSLT_ELEMENT_CATEGORY_LRE;
            if (cur->properties != NULL) {
            xmlAttrPtr attr = cur->properties;
            /*
            * Attribute "xsl:exclude-result-prefixes".
            */
            cctxt->inode->exclResultNs =
                xsltParseExclResultPrefixes(cctxt, cur,
                cctxt->inode->exclResultNs,
                XSLT_ELEMENT_CATEGORY_LRE);
            /*
            * Attribute "xsl:version".
            */
            xsltParseAttrXSLTVersion(cctxt, cur,
                XSLT_ELEMENT_CATEGORY_LRE);
            /*
            * Report invalid XSLT attributes.
            * For XSLT 1.0 only xsl:use-attribute-sets is allowed
            * next to xsl:version, xsl:exclude-result-prefixes and
            * xsl:extension-element-prefixes.
            *
            * Mark all XSLT attributes, in order to skip such
            * attributes when instantiating the LRE.
            */
            do {
                if ((attr->psvi != xsltXSLTAttrMarker) &&
                IS_XSLT_ATTR_FAST(attr))
                {
                if (! xmlStrEqual(attr->name,
                    BAD_CAST "use-attribute-sets"))
                {
                    xsltTransformError(NULL, cctxt->style,
                    cur,
                    "Unknown XSLT attribute '%s'.\n",
                    attr->name);
                    cctxt->style->errors++;
                } else {
                    /*
                    * XSLT attr marker.
                    */
                    attr->psvi = (void *) xsltXSLTAttrMarker;
                }
                }
                attr = attr->next;
            } while (attr != NULL);
            }
            /*
            * Create/reuse info for the literal result element.
            */
            if (cctxt->inode->nsChanged)
            xsltLREInfoCreate(cctxt, cur, 1);
            cur->psvi = cctxt->inode->litResElemInfo;
            /*
            * Apply ns-aliasing on the element and on its attributes.
            */
            if (cctxt->hasNsAliases)
            xsltLREBuildEffectiveNs(cctxt, cur);
            /*
            * Compile attribute value templates (AVT).
            */
            if (cur->properties) {
            xmlAttrPtr attr = cur->properties;
 
            while (attr != NULL) {
                xsltCompileAttr(cctxt->style, attr);
                attr = attr->next;
            }
            }
            /*
            * Parse the content, which is defined to be a "template"
            * (or "sequence constructor" in XSLT 2.0 terms).
            */
            if (cur->children != NULL) {
            xsltParseSequenceConstructor(cctxt, cur->children);
            }
        }
        /*
        * Leave the non-XSLT element.
        */
        xsltCompilerNodePop(cctxt, cur);
        }
    }
    cur = cur->next;
    }
    if (deleteNode != NULL) {
#ifdef WITH_XSLT_DEBUG_BLANKS
    xsltGenericDebug(xsltGenericDebugContext,
        "xsltParseSequenceConstructor: removing xsl:text element\n");
#endif
    xmlUnlinkNode(deleteNode);
    xmlFreeNode(deleteNode);
    deleteNode = NULL;
    }
}
 
void
xsltParseTemplateContent(xsltStylesheetPtr style, xmlNodePtr templ) {
    if ((style == NULL) || (templ == NULL) ||
        (templ->type == XML_NAMESPACE_DECL))
    return;
 
    /*
    * Detection of handled content of extension instructions.
    */
    if (XSLT_CCTXT(style)->inode->category == XSLT_ELEMENT_CATEGORY_EXTENSION) {
    XSLT_CCTXT(style)->inode->extContentHandled = 1;
    }
 
    if (templ->children != NULL) {
    xmlNodePtr child = templ->children;
    /*
    * Process xsl:param elements, which can only occur as the
    * immediate children of xsl:template (well, and of any
    * user-defined extension instruction if needed).
    */
    do {
        if ((child->type == XML_ELEMENT_NODE) &&
        IS_XSLT_ELEM_FAST(child) &&
        IS_XSLT_NAME(child, "param"))
        {
        XSLT_CCTXT(style)->inode->curChildType = XSLT_FUNC_PARAM;
        xsltParseAnyXSLTElem(XSLT_CCTXT(style), child);
        } else
        break;
        child = child->next;
    } while (child != NULL);
    /*
    * Parse the content and register the pattern.
    */
    xsltParseSequenceConstructor(XSLT_CCTXT(style), child);
    }
}
 
#else /* XSLT_REFACTORED */
 
void
xsltParseTemplateContent(xsltStylesheetPtr style, xmlNodePtr templ) {
    xmlNodePtr cur, delete;
 
    if ((style == NULL) || (templ == NULL) ||
        (templ->type == XML_NAMESPACE_DECL)) return;
 
    /*
     * This content comes from the stylesheet
     * For stylesheets, the set of whitespace-preserving
     * element names consists of just xsl:text.
     */
    cur = templ->children;
    delete = NULL;
    while (cur != NULL) {
    if (delete != NULL) {
#ifdef WITH_XSLT_DEBUG_BLANKS
        xsltGenericDebug(xsltGenericDebugContext,
         "xsltParseTemplateContent: removing text\n");
#endif
        xmlUnlinkNode(delete);
        xmlFreeNode(delete);
        delete = NULL;
    }
    if (IS_XSLT_ELEM(cur)) {
            xsltStylePreCompute(style, cur);
 
        if (IS_XSLT_NAME(cur, "text")) {
        /*
        * TODO: Processing of xsl:text should be moved to
        *   xsltPreprocessStylesheet(), since otherwise this
        *   will be performed for every multiply included
        *   stylesheet; i.e. this here is not skipped with
        *   the use of the style->nopreproc flag.
        */
        if (cur->children != NULL) {
            xmlChar *prop;
            xmlNodePtr text = cur->children, next;
            int noesc = 0;
 
            prop = xmlGetNsProp(cur,
            (const xmlChar *)"disable-output-escaping",
            NULL);
            if (prop != NULL) {
#ifdef WITH_XSLT_DEBUG_PARSING
            xsltGenericDebug(xsltGenericDebugContext,
                 "Disable escaping: %s\n", text->content);
#endif
            if (xmlStrEqual(prop, (const xmlChar *)"yes")) {
                noesc = 1;
            } else if (!xmlStrEqual(prop,
                        (const xmlChar *)"no")){
                xsltTransformError(NULL, style, cur,
         "xsl:text: disable-output-escaping allows only yes or no\n");
                style->warnings++;
 
            }
            xmlFree(prop);
            }
 
            while (text != NULL) {
            if (text->type == XML_COMMENT_NODE) {
                text = text->next;
                continue;
            }
            if ((text->type != XML_TEXT_NODE) &&
                 (text->type != XML_CDATA_SECTION_NODE)) {
                xsltTransformError(NULL, style, cur,
         "xsltParseTemplateContent: xslt:text content problem\n");
                style->errors++;
                break;
            }
            if ((noesc) && (text->type != XML_CDATA_SECTION_NODE))
                text->name = xmlStringTextNoenc;
            text = text->next;
            }
 
            /*
             * replace xsl:text by the list of childs
             */
            if (text == NULL) {
            text = cur->children;
            while (text != NULL) {
                if ((style->internalized) &&
                    (text->content != NULL) &&
                    (!xmlDictOwns(style->dict, text->content))) {
 
                /*
                 * internalize the text string