preproc.c

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/*
 * preproc.c: Preprocessing of style operations
 *
 * References:
 *   http://www.w3.org/TR/1999/REC-xslt-19991116
 *
 *   Michael Kay "XSLT Programmer's Reference" pp 637-643
 *   Writing Multiple Output Files
 *
 *   XSLT-1.1 Working Draft
 *   http://www.w3.org/TR/xslt11#multiple-output
 *
 * See Copyright for the status of this software.
 *
 * daniel@veillard.com
 */

#define IN_LIBXSLT
#include "libxslt.h"

#include <string.h>

#include <libxml/xmlmemory.h>
#include <libxml/parser.h>
#include <libxml/tree.h>
#include <libxml/valid.h>
#include <libxml/hash.h>
#include <libxml/uri.h>
#include <libxml/encoding.h>
#include <libxml/xmlerror.h>
#include "xslt.h"
#include "xsltutils.h"
#include "xsltInternals.h"
#include "transform.h"
#include "templates.h"
#include "variables.h"
#include "numbersInternals.h"
#include "preproc.h"
#include "extra.h"
#include "imports.h"
#include "extensions.h"

#ifdef WITH_XSLT_DEBUG
#define WITH_XSLT_DEBUG_PREPROC
#endif

const xmlChar *xsltExtMarker = (const xmlChar *) "Extension Element";

/************************************************************************
 *                                  *
 *          Grammar checks                  *
 *                                  *
 ************************************************************************/

#ifdef XSLT_REFACTORED
    /*
    * Grammar checks are now performed in xslt.c.
    */
#else

static int
xsltCheckTopLevelElement(xsltStylesheetPtr style, xmlNodePtr inst, int err) {
    xmlNodePtr parent;
    if ((style == NULL) || (inst == NULL) || (inst->ns == NULL))
        return(-1);
    
    parent = inst->parent;
    if (parent == NULL) {
        if (err) {
        xsltTransformError(NULL, style, inst,
            "internal problem: element has no parent\n");
        style->errors++;
    }
    return(0);
    }
    if ((parent->ns == NULL) || (parent->type != XML_ELEMENT_NODE) ||
        ((parent->ns != inst->ns) &&
     (!xmlStrEqual(parent->ns->href, inst->ns->href))) ||
    ((!xmlStrEqual(parent->name, BAD_CAST "stylesheet")) &&
     (!xmlStrEqual(parent->name, BAD_CAST "transform")))) {
    if (err) {
        xsltTransformError(NULL, style, inst,
            "element %s only allowed as child of stylesheet\n",
                   inst->name);
        style->errors++;
    }
    return(0);
    }
    return(1);
}

static void
xsltCheckInstructionElement(xsltStylesheetPtr style, xmlNodePtr inst) {
    xmlNodePtr parent;
    int has_ext;

    if ((style == NULL) || (inst == NULL) || (inst->ns == NULL) ||
        (style->literal_result))
        return;

    has_ext = (style->extInfos != NULL);
    
    parent = inst->parent;
    if (parent == NULL) {
    xsltTransformError(NULL, style, inst,
        "internal problem: element has no parent\n");
    style->errors++;
    return;
    }
    while ((parent != NULL) && (parent->type != XML_DOCUMENT_NODE)) {
        if (((parent->ns == inst->ns) ||
         ((parent->ns != NULL) &&
          (xmlStrEqual(parent->ns->href, inst->ns->href)))) &&
        ((xmlStrEqual(parent->name, BAD_CAST "template")) ||
         (xmlStrEqual(parent->name, BAD_CAST "param")) ||
         (xmlStrEqual(parent->name, BAD_CAST "attribute")) ||
         (xmlStrEqual(parent->name, BAD_CAST "variable")))) {
        return;
    }

    /*
     * if we are within an extension element all bets are off
     * about the semantic there e.g. xsl:param within func:function
     */
    if ((has_ext) && (parent->ns != NULL) &&
        (xmlHashLookup(style->extInfos, parent->ns->href) != NULL))
        return;
    
        parent = parent->parent;
    }
    xsltTransformError(NULL, style, inst,
        "element %s only allowed within a template, variable or param\n",
                   inst->name);
    style->errors++;
}

static void
xsltCheckParentElement(xsltStylesheetPtr style, xmlNodePtr inst,
                       const xmlChar *allow1, const xmlChar *allow2) {
    xmlNodePtr parent;

    if ((style == NULL) || (inst == NULL) || (inst->ns == NULL) ||
        (style->literal_result))
        return;

    parent = inst->parent;
    if (parent == NULL) {
    xsltTransformError(NULL, style, inst,
        "internal problem: element has no parent\n");
    style->errors++;
    return;
    }
    if (((parent->ns == inst->ns) ||
     ((parent->ns != NULL) &&
      (xmlStrEqual(parent->ns->href, inst->ns->href)))) &&
    ((xmlStrEqual(parent->name, allow1)) ||
     (xmlStrEqual(parent->name, allow2)))) {
    return;
    }

    if (style->extInfos != NULL) {
    while ((parent != NULL) && (parent->type != XML_DOCUMENT_NODE)) {
        /*
         * if we are within an extension element all bets are off
         * about the semantic there e.g. xsl:param within func:function
         */
        if ((parent->ns != NULL) &&
        (xmlHashLookup(style->extInfos, parent->ns->href) != NULL))
        return;
        
        parent = parent->parent;
    }
    }
    xsltTransformError(NULL, style, inst,
               "element %s is not allowed within that context\n",
               inst->name);
    style->errors++;
}
#endif

/************************************************************************
 *                                  *
 *          handling of precomputed data            *
 *                                  *
 ************************************************************************/

static xsltStylePreCompPtr
xsltNewStylePreComp(xsltStylesheetPtr style, xsltStyleType type) {
    xsltStylePreCompPtr cur;
#ifdef XSLT_REFACTORED
    size_t size;
#endif

    if (style == NULL)
        return(NULL);
   
#ifdef XSLT_REFACTORED
    /*
    * URGENT TODO: Use specialized factory functions in order
    *   to avoid this ugliness.
    */
    switch (type) {
        case XSLT_FUNC_COPY:
            size = sizeof(xsltStyleItemCopy); break;
        case XSLT_FUNC_SORT:
            size = sizeof(xsltStyleItemSort); break;
        case XSLT_FUNC_TEXT:
            size = sizeof(xsltStyleItemText); break;
        case XSLT_FUNC_ELEMENT:
            size = sizeof(xsltStyleItemElement); break;
        case XSLT_FUNC_ATTRIBUTE:
            size = sizeof(xsltStyleItemAttribute); break;
        case XSLT_FUNC_COMMENT:
            size = sizeof(xsltStyleItemComment); break;
        case XSLT_FUNC_PI:
            size = sizeof(xsltStyleItemPI); break;
        case XSLT_FUNC_COPYOF:
            size = sizeof(xsltStyleItemCopyOf); break;
        case XSLT_FUNC_VALUEOF:
            size = sizeof(xsltStyleItemValueOf); break;;
        case XSLT_FUNC_NUMBER:
            size = sizeof(xsltStyleItemNumber); break;
        case XSLT_FUNC_APPLYIMPORTS:
            size = sizeof(xsltStyleItemApplyImports); break;
        case XSLT_FUNC_CALLTEMPLATE:
            size = sizeof(xsltStyleItemCallTemplate); break;
        case XSLT_FUNC_APPLYTEMPLATES:
            size = sizeof(xsltStyleItemApplyTemplates); break;
        case XSLT_FUNC_CHOOSE:
            size = sizeof(xsltStyleItemChoose); break;
        case XSLT_FUNC_IF:
            size = sizeof(xsltStyleItemIf); break;
        case XSLT_FUNC_FOREACH:
            size = sizeof(xsltStyleItemForEach); break;
        case XSLT_FUNC_DOCUMENT:
            size = sizeof(xsltStyleItemDocument); break;
    case XSLT_FUNC_WITHPARAM:
        size = sizeof(xsltStyleItemWithParam); break;
    case XSLT_FUNC_PARAM:
        size = sizeof(xsltStyleItemParam); break;
    case XSLT_FUNC_VARIABLE:
        size = sizeof(xsltStyleItemVariable); break;
    case XSLT_FUNC_WHEN:
        size = sizeof(xsltStyleItemWhen); break;
    case XSLT_FUNC_OTHERWISE:
        size = sizeof(xsltStyleItemOtherwise); break;
    default:    
        xsltTransformError(NULL, style, NULL,
            "xsltNewStylePreComp : invalid type %d\n", type);
        style->errors++;
        return(NULL);
    }
    /*
    * Create the structure.
    */
    cur = (xsltStylePreCompPtr) xmlMalloc(size);
    if (cur == NULL) {
    xsltTransformError(NULL, style, NULL,
        "xsltNewStylePreComp : malloc failed\n");
    style->errors++;
    return(NULL);
    }
    memset(cur, 0, size);

#else /* XSLT_REFACTORED */
    /*
    * Old behaviour.
    */
    cur = (xsltStylePreCompPtr) xmlMalloc(sizeof(xsltStylePreComp));
    if (cur == NULL) {
    xsltTransformError(NULL, style, NULL,
        "xsltNewStylePreComp : malloc failed\n");
    style->errors++;
    return(NULL);
    }
    memset(cur, 0, sizeof(xsltStylePreComp));
#endif /* XSLT_REFACTORED */

    /*
    * URGENT TODO: Better to move this to spezialized factory functions.
    */
    cur->type = type;
    switch (cur->type) {
        case XSLT_FUNC_COPY:
            cur->func = (xsltTransformFunction) xsltCopy;break;
        case XSLT_FUNC_SORT:
            cur->func = (xsltTransformFunction) xsltSort;break;
        case XSLT_FUNC_TEXT:
            cur->func = (xsltTransformFunction) xsltText;break;
        case XSLT_FUNC_ELEMENT:
            cur->func = (xsltTransformFunction) xsltElement;break;
        case XSLT_FUNC_ATTRIBUTE:
            cur->func = (xsltTransformFunction) xsltAttribute;break;
        case XSLT_FUNC_COMMENT:
            cur->func = (xsltTransformFunction) xsltComment;break;
        case XSLT_FUNC_PI:
            cur->func = (xsltTransformFunction) xsltProcessingInstruction;
        break;
        case XSLT_FUNC_COPYOF:
            cur->func = (xsltTransformFunction) xsltCopyOf;break;
        case XSLT_FUNC_VALUEOF:
            cur->func = (xsltTransformFunction) xsltValueOf;break;
        case XSLT_FUNC_NUMBER:
            cur->func = (xsltTransformFunction) xsltNumber;break;
        case XSLT_FUNC_APPLYIMPORTS:
            cur->func = (xsltTransformFunction) xsltApplyImports;break;
        case XSLT_FUNC_CALLTEMPLATE:
            cur->func = (xsltTransformFunction) xsltCallTemplate;break;
        case XSLT_FUNC_APPLYTEMPLATES:
            cur->func = (xsltTransformFunction) xsltApplyTemplates;break;
        case XSLT_FUNC_CHOOSE:
            cur->func = (xsltTransformFunction) xsltChoose;break;
        case XSLT_FUNC_IF:
            cur->func = (xsltTransformFunction) xsltIf;break;
        case XSLT_FUNC_FOREACH:
            cur->func = (xsltTransformFunction) xsltForEach;break;
        case XSLT_FUNC_DOCUMENT:
            cur->func = (xsltTransformFunction) xsltDocumentElem;break;
    case XSLT_FUNC_WITHPARAM:
    case XSLT_FUNC_PARAM:       
    case XSLT_FUNC_VARIABLE:        
    case XSLT_FUNC_WHEN:
        break;
    default:
    if (cur->func == NULL) {
        xsltTransformError(NULL, style, NULL,
            "xsltNewStylePreComp : no function for type %d\n", type);
        style->errors++;
    }
    }
    cur->next = style->preComps;
    style->preComps = (xsltElemPreCompPtr) cur;

    return(cur);
}

static void
xsltFreeStylePreComp(xsltStylePreCompPtr comp) {
    if (comp == NULL)
    return;
#ifdef XSLT_REFACTORED
    /*
    * URGENT TODO: Implement destructors.
    */
    switch (comp->type) {
    case XSLT_FUNC_LITERAL_RESULT_ELEMENT:
        break;
    case XSLT_FUNC_COPY:
            break;
        case XSLT_FUNC_SORT: {
        xsltStyleItemSortPtr item = (xsltStyleItemSortPtr) comp;
        if (item->locale != (xsltLocale)0)
            xsltFreeLocale(item->locale);
        if (item->comp != NULL)
            xmlXPathFreeCompExpr(item->comp);
        }
            break;
        case XSLT_FUNC_TEXT:
            break;
        case XSLT_FUNC_ELEMENT:
            break;
        case XSLT_FUNC_ATTRIBUTE:
            break;
        case XSLT_FUNC_COMMENT:
            break;
        case XSLT_FUNC_PI:
        break;
        case XSLT_FUNC_COPYOF: {
        xsltStyleItemCopyOfPtr item = (xsltStyleItemCopyOfPtr) comp;
        if (item->comp != NULL)
            xmlXPathFreeCompExpr(item->comp);
        }
            break;
        case XSLT_FUNC_VALUEOF: {
        xsltStyleItemValueOfPtr item = (xsltStyleItemValueOfPtr) comp;
        if (item->comp != NULL)
            xmlXPathFreeCompExpr(item->comp);
        }
            break;
        case XSLT_FUNC_NUMBER:
            break;
        case XSLT_FUNC_APPLYIMPORTS:
            break;
        case XSLT_FUNC_CALLTEMPLATE:
            break;
        case XSLT_FUNC_APPLYTEMPLATES: {
        xsltStyleItemApplyTemplatesPtr item =
            (xsltStyleItemApplyTemplatesPtr) comp;
        if (item->comp != NULL)
            xmlXPathFreeCompExpr(item->comp);
        }
            break;
        case XSLT_FUNC_CHOOSE:
            break;
        case XSLT_FUNC_IF: {
        xsltStyleItemIfPtr item = (xsltStyleItemIfPtr) comp;
        if (item->comp != NULL)
            xmlXPathFreeCompExpr(item->comp);
        }
            break;
        case XSLT_FUNC_FOREACH: {
        xsltStyleItemForEachPtr item =
            (xsltStyleItemForEachPtr) comp;
        if (item->comp != NULL)
            xmlXPathFreeCompExpr(item->comp);
        }
            break;
        case XSLT_FUNC_DOCUMENT:
            break;
    case XSLT_FUNC_WITHPARAM: {
        xsltStyleItemWithParamPtr item =
            (xsltStyleItemWithParamPtr) comp;
        if (item->comp != NULL)
            xmlXPathFreeCompExpr(item->comp);
        }
        break;
    case XSLT_FUNC_PARAM: {
        xsltStyleItemParamPtr item =
            (xsltStyleItemParamPtr) comp;
        if (item->comp != NULL)
            xmlXPathFreeCompExpr(item->comp);
        }
        break;
    case XSLT_FUNC_VARIABLE: {
        xsltStyleItemVariablePtr item =
            (xsltStyleItemVariablePtr) comp;
        if (item->comp != NULL)
            xmlXPathFreeCompExpr(item->comp);
        }
        break;
    case XSLT_FUNC_WHEN: {
        xsltStyleItemWhenPtr item =
            (xsltStyleItemWhenPtr) comp;
        if (item->comp != NULL)
            xmlXPathFreeCompExpr(item->comp);
        }
        break;
    case XSLT_FUNC_OTHERWISE:       
    case XSLT_FUNC_FALLBACK:
    case XSLT_FUNC_MESSAGE:
    case XSLT_FUNC_INCLUDE:
    case XSLT_FUNC_ATTRSET:
    
        break;
    default:
        /* TODO: Raise error. */
        break;
    }
#else    
    if (comp->locale != (xsltLocale)0)
    xsltFreeLocale(comp->locale);
    if (comp->comp != NULL)
    xmlXPathFreeCompExpr(comp->comp);
    if (comp->nsList != NULL)
    xmlFree(comp->nsList);
#endif

    xmlFree(comp);
}


/************************************************************************
 *                                  *
 *          XSLT-1.1 extensions                 *
 *                                  *
 ************************************************************************/

xsltElemPreCompPtr
xsltDocumentComp(xsltStylesheetPtr style, xmlNodePtr inst,
         xsltTransformFunction function ATTRIBUTE_UNUSED) {
#ifdef XSLT_REFACTORED
    xsltStyleItemDocumentPtr comp;
#else
    xsltStylePreCompPtr comp;
#endif
    const xmlChar *filename = NULL;

    /*
    * As of 2006-03-30, this function is currently defined in Libxslt
    * to be used for:
    * (in libxslt/extra.c)
    * "output" in XSLT_SAXON_NAMESPACE
    * "write" XSLT_XALAN_NAMESPACE
    * "document" XSLT_XT_NAMESPACE
    * "document" XSLT_NAMESPACE (from the abandoned old working
    *                            draft of XSLT 1.1)
    * (in libexslt/common.c)
    * "document" in EXSLT_COMMON_NAMESPACE
    */
#ifdef XSLT_REFACTORED
    comp = (xsltStyleItemDocumentPtr)
    xsltNewStylePreComp(style, XSLT_FUNC_DOCUMENT);
#else
    comp = xsltNewStylePreComp(style, XSLT_FUNC_DOCUMENT);
#endif
    
    if (comp == NULL)
    return (NULL);
    comp->inst = inst;
    comp->ver11 = 0;

    if (xmlStrEqual(inst->name, (const xmlChar *) "output")) {
#ifdef WITH_XSLT_DEBUG_EXTRA
    xsltGenericDebug(xsltGenericDebugContext,
        "Found saxon:output extension\n");
#endif
    /*
    * The element "output" is in the namespace XSLT_SAXON_NAMESPACE
    *   (http://icl.com/saxon)
    * The @file is in no namespace; it is an AVT.
    *   (http://www.computerwizards.com/saxon/doc/extensions.html#saxon:output)
    *
    * TODO: Do we need not to check the namespace here?
    */
    filename = xsltEvalStaticAttrValueTemplate(style, inst,
             (const xmlChar *)"file",
             NULL, &comp->has_filename);
    } else if (xmlStrEqual(inst->name, (const xmlChar *) "write")) {
#ifdef WITH_XSLT_DEBUG_EXTRA
    xsltGenericDebug(xsltGenericDebugContext,
        "Found xalan:write extension\n");
#endif
    /* the filename need to be interpreted */
    /*
    * TODO: Is "filename need to be interpreted" meant to be a todo?
    *   Where will be the filename of xalan:write be processed?
    *
    * TODO: Do we need not to check the namespace here?
    *   The extension ns is "http://xml.apache.org/xalan/redirect".
    *   See http://xml.apache.org/xalan-j/extensionslib.html.
    */
    } else if (xmlStrEqual(inst->name, (const xmlChar *) "document")) {
    if (inst->ns != NULL) {
        if (xmlStrEqual(inst->ns->href, XSLT_NAMESPACE)) {
        /*
        * Mark the instruction as being of
        * XSLT version 1.1 (abandoned).
        */
        comp->ver11 = 1;
#ifdef WITH_XSLT_DEBUG_EXTRA
        xsltGenericDebug(xsltGenericDebugContext,
            "Found xslt11:document construct\n");
#endif              
        } else {        
        if (xmlStrEqual(inst->ns->href,
            (const xmlChar *)"http://exslt.org/common")) {
            /* EXSLT. */
#ifdef WITH_XSLT_DEBUG_EXTRA
            xsltGenericDebug(xsltGenericDebugContext,
            "Found exslt:document extension\n");
#endif
        } else if (xmlStrEqual(inst->ns->href, XSLT_XT_NAMESPACE)) {
            /* James Clark's XT. */
#ifdef WITH_XSLT_DEBUG_EXTRA
            xsltGenericDebug(xsltGenericDebugContext,
            "Found xt:document extension\n");
#endif
        }
        }
    }
    /*
    * The element "document" is used in conjunction with the
    * following namespaces:
    *
    * 1) XSLT_NAMESPACE (http://www.w3.org/1999/XSL/Transform version 1.1)
    *    <!ELEMENT xsl:document %template;>
    *    <!ATTLIST xsl:document
    *       href %avt; #REQUIRED
    *    @href is an AVT
    *    IMPORTANT: xsl:document was in the abandoned XSLT 1.1 draft,
    *    it was removed and isn't available in XSLT 1.1 anymore.
    *    In XSLT 2.0 it was renamed to xsl:result-document.
    *
    *   All other attributes are identical to the attributes
    *   on xsl:output
    *
    * 2) EXSLT_COMMON_NAMESPACE (http://exslt.org/common)
    *    <exsl:document
    *       href = { uri-reference }
    *    TODO: is @href is an AVT?
    *
    * 3) XSLT_XT_NAMESPACE (http://www.jclark.com/xt)
    *     Example: <xt:document method="xml" href="myFile.xml">
    *    TODO: is @href is an AVT?
    *       
    * In all cases @href is in no namespace.
    */
    filename = xsltEvalStaticAttrValueTemplate(style, inst,
        (const xmlChar *)"href", NULL, &comp->has_filename);
    }       
    if (!comp->has_filename) {
    goto error;
    }
    comp->filename = filename;

error:
    return ((xsltElemPreCompPtr) comp);
}

/************************************************************************
 *                                  *
 *      Most of the XSLT-1.0 transformations            *
 *                                  *
 ************************************************************************/

static void
xsltSortComp(xsltStylesheetPtr style, xmlNodePtr inst) {
#ifdef XSLT_REFACTORED
    xsltStyleItemSortPtr comp;
#else
    xsltStylePreCompPtr comp;
#endif
    if ((style == NULL) || (inst == NULL))
    return;

#ifdef XSLT_REFACTORED
    comp = (xsltStyleItemSortPtr) xsltNewStylePreComp(style, XSLT_FUNC_SORT);
#else
    comp = xsltNewStylePreComp(style, XSLT_FUNC_SORT);
#endif
    
    if (comp == NULL)
    return;
    inst->psvi = comp;
    comp->inst = inst;

    comp->stype = xsltEvalStaticAttrValueTemplate(style, inst,
             (const xmlChar *)"data-type",
             NULL, &comp->has_stype);
    if (comp->stype != NULL) {
    if (xmlStrEqual(comp->stype, (const xmlChar *) "text"))
        comp->number = 0;
    else if (xmlStrEqual(comp->stype, (const xmlChar *) "number"))
        comp->number = 1;
    else {
        xsltTransformError(NULL, style, inst,
         "xsltSortComp: no support for data-type = %s\n", comp->stype);
        comp->number = 0; /* use default */
        if (style != NULL) style->warnings++;
    }
    }
    comp->order = xsltEvalStaticAttrValueTemplate(style, inst,
                  (const xmlChar *)"order",
                  NULL, &comp->has_order);
    if (comp->order != NULL) {
    if (xmlStrEqual(comp->order, (const xmlChar *) "ascending"))
        comp->descending = 0;
    else if (xmlStrEqual(comp->order, (const xmlChar *) "descending"))
        comp->descending = 1;
    else {
        xsltTransformError(NULL, style, inst,
         "xsltSortComp: invalid value %s for order\n", comp->order);
        comp->descending = 0; /* use default */
        if (style != NULL) style->warnings++;
    }
    }
    comp->case_order = xsltEvalStaticAttrValueTemplate(style, inst,
                  (const xmlChar *)"case-order",
                  NULL, &comp->has_use);
    if (comp->case_order != NULL) {
    if (xmlStrEqual(comp->case_order, (const xmlChar *) "upper-first"))
        comp->lower_first = 0;
    else if (xmlStrEqual(comp->case_order, (const xmlChar *) "lower-first"))
        comp->lower_first = 1;
    else {
        xsltTransformError(NULL, style, inst,
         "xsltSortComp: invalid value %s for order\n", comp->order);
        comp->lower_first = 0; /* use default */
        if (style != NULL) style->warnings++;
    }
    }

    comp->lang = xsltEvalStaticAttrValueTemplate(style, inst,
                 (const xmlChar *)"lang",
                 NULL, &comp->has_lang);
    if (comp->lang != NULL) {
    comp->locale = xsltNewLocale(comp->lang);
    }
    else {
        comp->locale = (xsltLocale)0;
    }

    comp->select = xsltGetCNsProp(style, inst,(const xmlChar *)"select", XSLT_NAMESPACE);
    if (comp->select == NULL) {
    /*
     * The default value of the select attribute is ., which will
     * cause the string-value of the current node to be used as
     * the sort key.
     */
    comp->select = xmlDictLookup(style->dict, BAD_CAST ".", 1);
    }
    comp->comp = xsltXPathCompile(style, comp->select);
    if (comp->comp == NULL) {
    xsltTransformError(NULL, style, inst,
         "xsltSortComp: could not compile select expression '%s'\n",
                     comp->select);
    if (style != NULL) style->errors++;
    }
    if (inst->children != NULL) {
    xsltTransformError(NULL, style, inst,
    "xsl:sort : is not empty\n");
    if (style != NULL) style->errors++;
    }
}

static void
xsltCopyComp(xsltStylesheetPtr style, xmlNodePtr inst) {
#ifdef XSLT_REFACTORED
    xsltStyleItemCopyPtr comp;
#else
    xsltStylePreCompPtr comp;
#endif

    if ((style == NULL) || (inst == NULL))
    return;
#ifdef XSLT_REFACTORED
    comp = (xsltStyleItemCopyPtr) xsltNewStylePreComp(style, XSLT_FUNC_COPY);
#else
    comp = xsltNewStylePreComp(style, XSLT_FUNC_COPY);
#endif
    
    if (comp == NULL)
    return;
    inst->psvi = comp;
    comp->inst = inst;


    comp->use = xsltGetCNsProp(style, inst, (const xmlChar *)"use-attribute-sets",
                    XSLT_NAMESPACE);
    if (comp->use == NULL)
    comp->has_use = 0;
    else
    comp->has_use = 1;
}

#ifdef XSLT_REFACTORED
    /* Enable if ever needed for xsl:text. */
#else

static void
xsltTextComp(xsltStylesheetPtr style, xmlNodePtr inst) {
#ifdef XSLT_REFACTORED
    xsltStyleItemTextPtr comp;
#else
    xsltStylePreCompPtr comp;
#endif
    const xmlChar *prop;

    if ((style == NULL) || (inst == NULL))
    return;

#ifdef XSLT_REFACTORED
    comp = (xsltStyleItemTextPtr) xsltNewStylePreComp(style, XSLT_FUNC_TEXT);
#else
    comp = xsltNewStylePreComp(style, XSLT_FUNC_TEXT);
#endif    
    if (comp == NULL)
    return;
    inst->psvi = comp;
    comp->inst = inst;
    comp->noescape = 0;

    prop = xsltGetCNsProp(style, inst,
        (const xmlChar *)"disable-output-escaping",
            XSLT_NAMESPACE);
    if (prop != NULL) {
    if (xmlStrEqual(prop, (const xmlChar *)"yes")) {
        comp->noescape = 1;
    } else if (!xmlStrEqual(prop,
        (const xmlChar *)"no")){
        xsltTransformError(NULL, style, inst,
        "xsl:text: disable-output-escaping allows only yes or no\n");
        if (style != NULL) style->warnings++;
    }
    }
}
#endif /* else of XSLT_REFACTORED */

static void
xsltElementComp(xsltStylesheetPtr style, xmlNodePtr inst) {
#ifdef XSLT_REFACTORED
    xsltStyleItemElementPtr comp;
#else
    xsltStylePreCompPtr comp;
#endif

    /*
    * <xsl:element
    *   name = { qname }
    *   namespace = { uri-reference }
    *   use-attribute-sets = qnames>
    *   <!-- Content: template -->
    * </xsl:element>
    */
    if ((style == NULL) || (inst == NULL))
    return;

#ifdef XSLT_REFACTORED
    comp = (xsltStyleItemElementPtr) xsltNewStylePreComp(style, XSLT_FUNC_ELEMENT);
#else
    comp = xsltNewStylePreComp(style, XSLT_FUNC_ELEMENT);
#endif

    if (comp == NULL)
    return;
    inst->psvi = comp;
    comp->inst = inst;

    /*
    * Attribute "name".
    */
    /*
    * TODO: Precompile the AVT. See bug #344894.
    */
    comp->name = xsltEvalStaticAttrValueTemplate(style, inst,
    (const xmlChar *)"name", NULL, &comp->has_name);
    if (! comp->has_name) {
    xsltTransformError(NULL, style, inst,
        "xsl:element: The attribute 'name' is missing.\n");
    style->errors++;
    goto error;
    }
    /*
    * Attribute "namespace".
    */
    /*
    * TODO: Precompile the AVT. See bug #344894.
    */
    comp->ns = xsltEvalStaticAttrValueTemplate(style, inst,
    (const xmlChar *)"namespace", NULL, &comp->has_ns);
    
    if (comp->name != NULL) {   
    if (xmlValidateQName(comp->name, 0)) {
        xsltTransformError(NULL, style, inst,
        "xsl:element: The value '%s' of the attribute 'name' is "
        "not a valid QName.\n", comp->name);
        style->errors++;
    } else {
        const xmlChar *prefix = NULL, *name;

        name = xsltSplitQName(style->dict, comp->name, &prefix);
        if (comp->has_ns == 0) {        
        xmlNsPtr ns;

        /*
        * SPEC XSLT 1.0:
        *  "If the namespace attribute is not present, then the QName is
        *  expanded into an expanded-name using the namespace declarations
        *  in effect for the xsl:element element, including any default
        *  namespace declaration.
        */      
        ns = xmlSearchNs(inst->doc, inst, prefix);
        if (ns != NULL) {
            comp->ns = xmlDictLookup(style->dict, ns->href, -1);
            comp->has_ns = 1;
#ifdef XSLT_REFACTORED
            comp->nsPrefix = prefix;
            comp->name = name;
#endif
        } else if (prefix != NULL) {
            xsltTransformError(NULL, style, inst,
            "xsl:element: The prefixed QName '%s' "
            "has no namespace binding in scope in the "
            "stylesheet; this is an error, since the namespace was "
            "not specified by the instruction itself.\n", comp->name);
            style->errors++;
        }
        }       
        if ((prefix != NULL) &&
        (!xmlStrncasecmp(prefix, (xmlChar *)"xml", 3)))
        {
        /*
        * Mark is to be skipped.
        */
        comp->has_name = 0;     
        }
    }
    }    
    /*
    * Attribute "use-attribute-sets",
    */
    comp->use = xsltEvalStaticAttrValueTemplate(style, inst,
               (const xmlChar *)"use-attribute-sets",
               NULL, &comp->has_use);

error:    
    return;
}

static void
xsltAttributeComp(xsltStylesheetPtr style, xmlNodePtr inst) {
#ifdef XSLT_REFACTORED
    xsltStyleItemAttributePtr comp;
#else
    xsltStylePreCompPtr comp;
#endif

    /*
    * <xsl:attribute
    *   name = { qname }
    *   namespace = { uri-reference }>
    *   <!-- Content: template -->
    * </xsl:attribute>
    */
    if ((style == NULL) || (inst == NULL))
    return;

#ifdef XSLT_REFACTORED
    comp = (xsltStyleItemAttributePtr) xsltNewStylePreComp(style,
    XSLT_FUNC_ATTRIBUTE);
#else
    comp = xsltNewStylePreComp(style, XSLT_FUNC_ATTRIBUTE);
#endif
    
    if (comp == NULL)
    return;
    inst->psvi = comp;
    comp->inst = inst;

    /*
    * Attribute "name".
    */
    /*
    * TODO: Precompile the AVT. See bug #344894.
    */
    comp->name = xsltEvalStaticAttrValueTemplate(style, inst,
                 (const xmlChar *)"name",
                 NULL, &comp->has_name);
    if (! comp->has_name) {
    xsltTransformError(NULL, style, inst,
        "XSLT-attribute: The attribute 'name' is missing.\n");
    style->errors++;
    return;
    }    
    /*
    * Attribute "namespace".
    */
    /*
    * TODO: Precompile the AVT. See bug #344894.
    */
    comp->ns = xsltEvalStaticAttrValueTemplate(style, inst,
    (const xmlChar *)"namespace",
    NULL, &comp->has_ns);

    if (comp->name != NULL) {
    if (xmlValidateQName(comp->name, 0)) {
        xsltTransformError(NULL, style, inst,
        "xsl:attribute: The value '%s' of the attribute 'name' is "
        "not a valid QName.\n", comp->name);
        style->errors++;
    } else {
        const xmlChar *prefix = NULL, *name;

        name = xsltSplitQName(style->dict, comp->name, &prefix);
        if (prefix != NULL) {
        if (comp->has_ns == 0) {
            xmlNsPtr ns;

            /*
            * SPEC XSLT 1.0:
            *  "If the namespace attribute is not present, then the
            *  QName is expanded into an expanded-name using the
            *  namespace declarations in effect for the xsl:element
            *  element, including any default namespace declaration.
            */              
            ns = xmlSearchNs(inst->doc, inst, prefix);
            if (ns != NULL) {
            comp->ns = xmlDictLookup(style->dict, ns->href, -1);
            comp->has_ns = 1;
#ifdef XSLT_REFACTORED
            comp->nsPrefix = prefix;
            comp->name = name;
#endif
            } else {
            xsltTransformError(NULL, style, inst,
                "xsl:attribute: The prefixed QName '%s' "
                "has no namespace binding in scope in the "
                "stylesheet; this is an error, since the "
                "namespace was not specified by the instruction "
                "itself.\n", comp->name);
            style->errors++;
            }
        }
        if (!xmlStrncasecmp(prefix, (xmlChar *) "xmlns", 5)) {
            /*
            * SPEC XSLT 1.0:
            *  "It is an error if the string that results from
            *  instantiating the attribute value template is not a
            *  QName or is the string xmlns. An XSLT processor may
            *  signal the error; if it does not signal the error,
            *  it must recover by not adding the attribute to the
            *  result tree."
            *
            * Reject a prefix of "xmlns". Mark to be skipped.
            */
            comp->has_name = 0;
            
#ifdef WITH_XSLT_DEBUG_PARSING
            xsltGenericDebug(xsltGenericDebugContext,
            "xsltAttribute: xmlns prefix forbidden\n");
#endif          
            return;
        }
        
        }
    }   
    }
}

static void
xsltCommentComp(xsltStylesheetPtr style, xmlNodePtr inst) {
#ifdef XSLT_REFACTORED
    xsltStyleItemCommentPtr comp;
#else
    xsltStylePreCompPtr comp;
#endif

    if ((style == NULL) || (inst == NULL))
    return;

#ifdef XSLT_REFACTORED
    comp = (xsltStyleItemCommentPtr) xsltNewStylePreComp(style, XSLT_FUNC_COMMENT);
#else
    comp = xsltNewStylePreComp(style, XSLT_FUNC_COMMENT);
#endif

    if (comp == NULL)
    return;
    inst->psvi = comp;
    comp->inst = inst;
}

static void
xsltProcessingInstructionComp(xsltStylesheetPtr style, xmlNodePtr inst) {
#ifdef XSLT_REFACTORED
    xsltStyleItemPIPtr comp;
#else
    xsltStylePreCompPtr comp;
#endif

    if ((style == NULL) || (inst == NULL))
    return;

#ifdef XSLT_REFACTORED
    comp = (xsltStyleItemPIPtr) xsltNewStylePreComp(style, XSLT_FUNC_PI);
#else
    comp = xsltNewStylePreComp(style, XSLT_FUNC_PI);
#endif

    if (comp == NULL)
    return;
    inst->psvi = comp;
    comp->inst = inst;

    comp->name = xsltEvalStaticAttrValueTemplate(style, inst,
                 (const xmlChar *)"name",
                 XSLT_NAMESPACE, &comp->has_name);
}

static void
xsltCopyOfComp(xsltStylesheetPtr style, xmlNodePtr inst) {
#ifdef XSLT_REFACTORED
    xsltStyleItemCopyOfPtr comp;
#else
    xsltStylePreCompPtr comp;
#endif

    if ((style == NULL) || (inst == NULL))
    return;

#ifdef XSLT_REFACTORED
    comp = (xsltStyleItemCopyOfPtr) xsltNewStylePreComp(style, XSLT_FUNC_COPYOF);
#else
    comp = xsltNewStylePreComp(style, XSLT_FUNC_COPYOF);
#endif

    if (comp == NULL)
    return;
    inst->psvi = comp;
    comp->inst = inst;

    comp->select = xsltGetCNsProp(style, inst, (const xmlChar *)"select",
                            XSLT_NAMESPACE);
    if (comp->select == NULL) {
    xsltTransformError(NULL, style, inst,
         "xsl:copy-of : select is missing\n");
    if (style != NULL) style->errors++;
    return;
    }
    comp->comp = xsltXPathCompile(style, comp->select);
    if (comp->comp == NULL) {
    xsltTransformError(NULL, style, inst,
         "xsl:copy-of : could not compile select expression '%s'\n",
                     comp->select);
    if (style != NULL) style->errors++;
    }
}

static void
xsltValueOfComp(xsltStylesheetPtr style, xmlNodePtr inst) {
#ifdef XSLT_REFACTORED
    xsltStyleItemValueOfPtr comp;
#else
    xsltStylePreCompPtr comp;
#endif
    const xmlChar *prop;

    if ((style == NULL) || (inst == NULL))
    return;

#ifdef XSLT_REFACTORED
    comp = (xsltStyleItemValueOfPtr) xsltNewStylePreComp(style, XSLT_FUNC_VALUEOF);
#else
    comp = xsltNewStylePreComp(style, XSLT_FUNC_VALUEOF);
#endif

    if (comp == NULL)
    return;
    inst->psvi = comp;
    comp->inst = inst;

    prop = xsltGetCNsProp(style, inst,
        (const xmlChar *)"disable-output-escaping",
            XSLT_NAMESPACE);
    if (prop != NULL) {
    if (xmlStrEqual(prop, (const xmlChar *)"yes")) {
        comp->noescape = 1;
    } else if (!xmlStrEqual(prop,
                (const xmlChar *)"no")){
        xsltTransformError(NULL, style, inst,
"xsl:value-of : disable-output-escaping allows only yes or no\n");
        if (style != NULL) style->warnings++;
    }
    }
    comp->select = xsltGetCNsProp(style, inst, (const xmlChar *)"select",
                            XSLT_NAMESPACE);
    if (comp->select == NULL) {
    xsltTransformError(NULL, style, inst,
         "xsl:value-of : select is missing\n");
    if (style != NULL) style->errors++;
    return;
    }
    comp->comp = xsltXPathCompile(style, comp->select);
    if (comp->comp == NULL) {
    xsltTransformError(NULL, style, inst,
         "xsl:value-of : could not compile select expression '%s'\n",
                     comp->select);
    if (style != NULL) style->errors++;
    }
}

static void
xsltGetQNameProperty(xsltStylesheetPtr style, xmlNodePtr inst,
             const xmlChar *propName,
             int mandatory,
             int *hasProp, const xmlChar **nsName,
             const xmlChar** localName)
{
    const xmlChar *prop;

    if (nsName)
    *nsName = NULL;
    if (localName)
    *localName = NULL;
    if (hasProp)
    *hasProp = 0;

    prop = xsltGetCNsProp(style, inst, propName, XSLT_NAMESPACE);
    if (prop == NULL) {
    if (mandatory) {
        xsltTransformError(NULL, style, inst,
        "The attribute '%s' is missing.\n", propName);
        style->errors++;
        return;
    }
    } else {
        const xmlChar *URI;

    if (xmlValidateQName(prop, 0)) {
        xsltTransformError(NULL, style, inst,
        "The value '%s' of the attribute "
        "'%s' is not a valid QName.\n", prop, propName);
        style->errors++;
        return;
    } else {
        /*
        * @prop will be in the string dict afterwards, @URI not.
        */
        URI = xsltGetQNameURI2(style, inst, &prop);
        if (prop == NULL) {
        style->errors++;
        } else {
        *localName = prop;
        if (hasProp)
            *hasProp = 1;
        if (URI != NULL) {
            /*
            * Fixes bug #308441: Put the ns-name in the dict
            * in order to pointer compare names during XPath's
            * variable lookup.
            */
            if (nsName)
            *nsName = xmlDictLookup(style->dict, URI, -1);
            /* comp->has_ns = 1; */
        }
        }
    }
    }
    return;
}

static void
xsltWithParamComp(xsltStylesheetPtr style, xmlNodePtr inst) {
#ifdef XSLT_REFACTORED
    xsltStyleItemWithParamPtr comp;
#else
    xsltStylePreCompPtr comp;
#endif

    if ((style == NULL) || (inst == NULL))
    return;

#ifdef XSLT_REFACTORED
    comp = (xsltStyleItemWithParamPtr) xsltNewStylePreComp(style, XSLT_FUNC_WITHPARAM);
#else
    comp = xsltNewStylePreComp(style, XSLT_FUNC_WITHPARAM);
#endif

    if (comp == NULL)
    return;
    inst->psvi = comp;
    comp->inst = inst;

    /*
    * Attribute "name".
    */
    xsltGetQNameProperty(style, inst, BAD_CAST "name",
    1, &(comp->has_name), &(comp->ns), &(comp->name));
    if (comp->ns)
    comp->has_ns = 1;
    /*
    * Attribute "select".
    */
    comp->select = xsltGetCNsProp(style, inst, (const xmlChar *)"select",
                            XSLT_NAMESPACE);
    if (comp->select != NULL) {
    comp->comp = xsltXPathCompile(style, comp->select);
    if (comp->comp == NULL) {
        xsltTransformError(NULL, style, inst,
         "XSLT-with-param: Failed to compile select "
         "expression '%s'\n", comp->select);
        style->errors++;
    }
    if (inst->children != NULL) {
        xsltTransformError(NULL, style, inst,
        "XSLT-with-param: The content should be empty since "
        "the attribute select is present.\n");
        style->warnings++;
    }
    }
}

static void
xsltNumberComp(xsltStylesheetPtr style, xmlNodePtr cur) {
#ifdef XSLT_REFACTORED
    xsltStyleItemNumberPtr comp;
#else
    xsltStylePreCompPtr comp;
#endif
    const xmlChar *prop;

    if ((style == NULL) || (cur == NULL))
    return;

#ifdef XSLT_REFACTORED
    comp = (xsltStyleItemNumberPtr) xsltNewStylePreComp(style, XSLT_FUNC_NUMBER);
#else
    comp = xsltNewStylePreComp(style, XSLT_FUNC_NUMBER);
#endif

    if (comp == NULL)
    return;
    cur->psvi = comp;

    if ((style == NULL) || (cur == NULL))
    return;

    comp->numdata.doc = cur->doc;
    comp->numdata.node = cur;
    comp->numdata.value = xsltGetCNsProp(style, cur, (const xmlChar *)"value",
                                    XSLT_NAMESPACE);
    
    prop = xsltEvalStaticAttrValueTemplate(style, cur,
             (const xmlChar *)"format",
             XSLT_NAMESPACE, &comp->numdata.has_format);
    if (comp->numdata.has_format == 0) {
    comp->numdata.format = xmlDictLookup(style->dict, BAD_CAST "" , 0);
    } else {
    comp->numdata.format = prop;
    }

    comp->numdata.count = xsltGetCNsProp(style, cur, (const xmlChar *)"count",
                    XSLT_NAMESPACE);
    comp->numdata.from = xsltGetCNsProp(style, cur, (const xmlChar *)"from",
                    XSLT_NAMESPACE);
    
    prop = xsltGetCNsProp(style, cur, (const xmlChar *)"level", XSLT_NAMESPACE);
    if (prop != NULL) {
    if (xmlStrEqual(prop, BAD_CAST("single")) ||
        xmlStrEqual(prop, BAD_CAST("multiple")) ||
        xmlStrEqual(prop, BAD_CAST("any"))) {
        comp->numdata.level = prop;
    } else {
        xsltTransformError(NULL, style, cur,
             "xsl:number : invalid value %s for level\n", prop);
        if (style != NULL) style->warnings++;
    }
    }
    
    prop = xsltGetCNsProp(style, cur, (const xmlChar *)"lang", XSLT_NAMESPACE);
    if (prop != NULL) {
        xsltTransformError(NULL, style, cur,
         "xsl:number : lang attribute not implemented\n");
    XSLT_TODO; /* xsl:number lang attribute */
    }
    
    prop = xsltGetCNsProp(style, cur, (const xmlChar *)"letter-value", XSLT_NAMESPACE);
    if (prop != NULL) {
    if (xmlStrEqual(prop, BAD_CAST("alphabetic"))) {
        xsltTransformError(NULL, style, cur,
         "xsl:number : letter-value 'alphabetic' not implemented\n");
        if (style != NULL) style->warnings++;
        XSLT_TODO; /* xsl:number letter-value attribute alphabetic */
    } else if (xmlStrEqual(prop, BAD_CAST("traditional"))) {
        xsltTransformError(NULL, style, cur,
         "xsl:number : letter-value 'traditional' not implemented\n");
        if (style != NULL) style->warnings++;
        XSLT_TODO; /* xsl:number letter-value attribute traditional */
    } else {
        xsltTransformError(NULL, style, cur,
             "xsl:number : invalid value %s for letter-value\n", prop);
        if (style != NULL) style->warnings++;
    }
    }
    
    prop = xsltGetCNsProp(style, cur, (const xmlChar *)"grouping-separator",
                    XSLT_NAMESPACE);
    if (prop != NULL) {
        comp->numdata.groupingCharacterLen = xmlStrlen(prop);
    comp->numdata.groupingCharacter =
        xsltGetUTF8Char(prop, &(comp->numdata.groupingCharacterLen));
    }
    
    prop = xsltGetCNsProp(style, cur, (const xmlChar *)"grouping-size", XSLT_NAMESPACE);
    if (prop != NULL) {
    sscanf((char *)prop, "%d", &comp->numdata.digitsPerGroup);
    } else {
    comp->numdata.groupingCharacter = 0;
    }

    /* Set default values */
    if (comp->numdata.value == NULL) {
    if (comp->numdata.level == NULL) {
        comp->numdata.level = xmlDictLookup(style->dict,
                                            BAD_CAST"single", 6);
    }
    }
    
}

static void
xsltApplyImportsComp(xsltStylesheetPtr style, xmlNodePtr inst) {
#ifdef XSLT_REFACTORED
    xsltStyleItemApplyImportsPtr comp;
#else
    xsltStylePreCompPtr comp;
#endif

    if ((style == NULL) || (inst == NULL))
    return;

#ifdef XSLT_REFACTORED
    comp = (xsltStyleItemApplyImportsPtr) xsltNewStylePreComp(style, XSLT_FUNC_APPLYIMPORTS);
#else
    comp = xsltNewStylePreComp(style, XSLT_FUNC_APPLYIMPORTS);
#endif

    if (comp == NULL)
    return;
    inst->psvi = comp;
    comp->inst = inst;
}

static void
xsltCallTemplateComp(xsltStylesheetPtr style, xmlNodePtr inst) {
#ifdef XSLT_REFACTORED
    xsltStyleItemCallTemplatePtr comp;
#else
    xsltStylePreCompPtr comp;
#endif

    if ((style == NULL) || (inst == NULL))
    return;

#ifdef XSLT_REFACTORED
    comp = (xsltStyleItemCallTemplatePtr)
    xsltNewStylePreComp(style, XSLT_FUNC_CALLTEMPLATE);
#else
    comp = xsltNewStylePreComp(style, XSLT_FUNC_CALLTEMPLATE);
#endif

    if (comp == NULL)
    return;
    inst->psvi = comp;
    comp->inst = inst;

    /*
     * Attribute "name".
     */
    xsltGetQNameProperty(style, inst, BAD_CAST "name",
    1, &(comp->has_name), &(comp->ns), &(comp->name));
    if (comp->ns)
    comp->has_ns = 1;
}

static void
xsltApplyTemplatesComp(xsltStylesheetPtr style, xmlNodePtr inst) {
#ifdef XSLT_REFACTORED
    xsltStyleItemApplyTemplatesPtr comp;
#else
    xsltStylePreCompPtr comp;
#endif

    if ((style == NULL) || (inst == NULL))
    return;

#ifdef XSLT_REFACTORED
    comp = (xsltStyleItemApplyTemplatesPtr)
    xsltNewStylePreComp(style, XSLT_FUNC_APPLYTEMPLATES);
#else
    comp = xsltNewStylePreComp(style, XSLT_FUNC_APPLYTEMPLATES);
#endif

    if (comp == NULL)
    return;
    inst->psvi = comp;
    comp->inst = inst;

    /*
     * Attribute "mode".
     */
    xsltGetQNameProperty(style, inst, BAD_CAST "mode",
    0, NULL, &(comp->modeURI), &(comp->mode));
    /*
    * Attribute "select".
    */
    comp->select = xsltGetCNsProp(style, inst, BAD_CAST "select",
    XSLT_NAMESPACE);
    if (comp->select != NULL) {
    comp->comp = xsltXPathCompile(style, comp->select);
    if (comp->comp == NULL) {
        xsltTransformError(NULL, style, inst,
        "XSLT-apply-templates: could not compile select "
        "expression '%s'\n", comp->select);
         style->errors++;
    }
    }
    /* TODO: handle (or skip) the xsl:sort and xsl:with-param */
}

static void
xsltChooseComp(xsltStylesheetPtr style, xmlNodePtr inst) {
#ifdef XSLT_REFACTORED
    xsltStyleItemChoosePtr comp;
#else
    xsltStylePreCompPtr comp;
#endif

    if ((style == NULL) || (inst == NULL))
    return;

#ifdef XSLT_REFACTORED
    comp = (xsltStyleItemChoosePtr)
    xsltNewStylePreComp(style, XSLT_FUNC_CHOOSE);
#else
    comp = xsltNewStylePreComp(style, XSLT_FUNC_CHOOSE);
#endif

    if (comp == NULL)
    return;
    inst->psvi = comp;
    comp->inst = inst;
}

static void
xsltIfComp(xsltStylesheetPtr style, xmlNodePtr inst) {
#ifdef XSLT_REFACTORED
    xsltStyleItemIfPtr comp;
#else
    xsltStylePreCompPtr comp;
#endif

    if ((style == NULL) || (inst == NULL))
    return;

#ifdef XSLT_REFACTORED
    comp = (xsltStyleItemIfPtr)
    xsltNewStylePreComp(style, XSLT_FUNC_IF);
#else
    comp = xsltNewStylePreComp(style, XSLT_FUNC_IF);
#endif

    if (comp == NULL)
    return;
    inst->psvi = comp;
    comp->inst = inst;

    comp->test = xsltGetCNsProp(style, inst, (const xmlChar *)"test", XSLT_NAMESPACE);
    if (comp->test == NULL) {
    xsltTransformError(NULL, style, inst,
         "xsl:if : test is not defined\n");
    if (style != NULL) style->errors++;
    return;
    }
    comp->comp = xsltXPathCompile(style, comp->test);
    if (comp->comp == NULL) {
    xsltTransformError(NULL, style, inst,
         "xsl:if : could not compile test expression '%s'\n",
                     comp->test);
    if (style != NULL) style->errors++;
    }
}

static void
xsltWhenComp(xsltStylesheetPtr style, xmlNodePtr inst) {
#ifdef XSLT_REFACTORED
    xsltStyleItemWhenPtr comp;
#else
    xsltStylePreCompPtr comp;
#endif

    if ((style == NULL) || (inst == NULL))
    return;

#ifdef XSLT_REFACTORED
    comp = (xsltStyleItemWhenPtr)
    xsltNewStylePreComp(style, XSLT_FUNC_WHEN);
#else
    comp = xsltNewStylePreComp(style, XSLT_FUNC_WHEN);
#endif

    if (comp == NULL)
    return;
    inst->psvi = comp;
    comp->inst = inst;

    comp->test = xsltGetCNsProp(style, inst, (const xmlChar *)"test", XSLT_NAMESPACE);
    if (comp->test == NULL) {
    xsltTransformError(NULL, style, inst,
         "xsl:when : test is not defined\n");
    if (style != NULL) style->errors++;
    return;
    }
    comp->comp = xsltXPathCompile(style, comp->test);
    if (comp->comp == NULL) {
    xsltTransformError(NULL, style, inst,
         "xsl:when : could not compile test expression '%s'\n",
                     comp->test);
    if (style != NULL) style->errors++;
    }
}

static void
xsltForEachComp(xsltStylesheetPtr style, xmlNodePtr inst) {
#ifdef XSLT_REFACTORED
    xsltStyleItemForEachPtr comp;
#else
    xsltStylePreCompPtr comp;
#endif

    if ((style == NULL) || (inst == NULL))
    return;

#ifdef XSLT_REFACTORED
    comp = (xsltStyleItemForEachPtr)
    xsltNewStylePreComp(style, XSLT_FUNC_FOREACH);
#else
    comp = xsltNewStylePreComp(style, XSLT_FUNC_FOREACH);
#endif

    if (comp == NULL)
    return;
    inst->psvi = comp;
    comp->inst = inst;

    comp->select = xsltGetCNsProp(style, inst, (const xmlChar *)"select",
                            XSLT_NAMESPACE);
    if (comp->select == NULL) {
    xsltTransformError(NULL, style, inst,
        "xsl:for-each : select is missing\n");
    if (style != NULL) style->errors++;
    } else {
    comp->comp = xsltXPathCompile(style, comp->select);
    if (comp->comp == NULL) {
        xsltTransformError(NULL, style, inst,
     "xsl:for-each : could not compile select expression '%s'\n",
                 comp->select);
        if (style != NULL) style->errors++;
    }
    }
    /* TODO: handle and skip the xsl:sort */
}

static void
xsltVariableComp(xsltStylesheetPtr style, xmlNodePtr inst) {
#ifdef XSLT_REFACTORED
    xsltStyleItemVariablePtr comp;
#else
    xsltStylePreCompPtr comp;
#endif

    if ((style == NULL) || (inst == NULL))
    return;

#ifdef XSLT_REFACTORED
    comp = (xsltStyleItemVariablePtr)
    xsltNewStylePreComp(style, XSLT_FUNC_VARIABLE);
#else
    comp = xsltNewStylePreComp(style, XSLT_FUNC_VARIABLE);
#endif

    if (comp == NULL)
    return;

    inst->psvi = comp;
    comp->inst = inst;
    /*
     * The full template resolution can be done statically
     */

    /*
    * Attribute "name".
    */
    xsltGetQNameProperty(style, inst, BAD_CAST "name",
    1, &(comp->has_name), &(comp->ns), &(comp->name));
    if (comp->ns)
    comp->has_ns = 1;    
    /*
    * Attribute "select".
    */
    comp->select = xsltGetCNsProp(style, inst, (const xmlChar *)"select",
                            XSLT_NAMESPACE);
    if (comp->select != NULL) {
    comp->comp = xsltXPathCompile(style, comp->select);
    if (comp->comp == NULL) {
        xsltTransformError(NULL, style, inst,
        "XSLT-variable: Failed to compile the XPath expression '%s'.\n",
        comp->select);
        style->errors++;
    }
    if (inst->children != NULL) {
        xsltTransformError(NULL, style, inst,
        "XSLT-variable: The must be no child nodes, since the "
        "attribute 'select' was specified.\n");
        style->errors++;
    }
    }
}

static void
xsltParamComp(xsltStylesheetPtr style, xmlNodePtr inst) {
#ifdef XSLT_REFACTORED
    xsltStyleItemParamPtr comp;
#else
    xsltStylePreCompPtr comp;
#endif

    if ((style == NULL) || (inst == NULL))
    return;

#ifdef XSLT_REFACTORED
    comp = (xsltStyleItemParamPtr)
    xsltNewStylePreComp(style, XSLT_FUNC_PARAM);
#else
    comp = xsltNewStylePreComp(style, XSLT_FUNC_PARAM);
#endif

    if (comp == NULL)
    return;
    inst->psvi = comp;
    comp->inst = inst;

    /*
     * Attribute "name".
     */
    xsltGetQNameProperty(style, inst, BAD_CAST "name",
    1, &(comp->has_name), &(comp->ns), &(comp->name));
    if (comp->ns)
    comp->has_ns = 1;
    /*
    * Attribute "select".
    */
    comp->select = xsltGetCNsProp(style, inst, (const xmlChar *)"select",
                            XSLT_NAMESPACE);
    if (comp->select != NULL) {
    comp->comp = xsltXPathCompile(style, comp->select);
    if (comp->comp == NULL) {
        xsltTransformError(NULL, style, inst,
        "XSLT-param: could not compile select expression '%s'.\n",
        comp->select);
        style->errors++;
    }
    if (inst->children != NULL) {
        xsltTransformError(NULL, style, inst,
        "XSLT-param: The content should be empty since the "
        "attribute 'select' is present.\n");
        style->warnings++;
    }
    }
}

/************************************************************************
 *                                  *
 *          Generic interface                   *
 *                                  *
 ************************************************************************/

void
xsltFreeStylePreComps(xsltStylesheetPtr style) {
    xsltElemPreCompPtr cur, next;

    if (style == NULL)
    return;        
    
    cur = style->preComps;
    while (cur != NULL) {
    next = cur->next;       
    if (cur->type == XSLT_FUNC_EXTENSION)
        cur->free(cur);
    else
        xsltFreeStylePreComp((xsltStylePreCompPtr) cur);
    cur = next;
    }
}

#ifdef XSLT_REFACTORED

void
xsltStylePreCompute(xsltStylesheetPtr style, xmlNodePtr node) {
    /*    
    * The xsltXSLTElemMarker marker was set beforehand by
    *  the parsing mechanism for all elements in the XSLT namespace.
    */
    if (style == NULL) {
    if (node != NULL)
        node->psvi = NULL;
    return;
    }
    if (node == NULL)
    return;
    if (! IS_XSLT_ELEM_FAST(node))
    return;

    node->psvi = NULL;
    if (XSLT_CCTXT(style)->inode->type != 0) {
    switch (XSLT_CCTXT(style)->inode->type) {
        case XSLT_FUNC_APPLYTEMPLATES:
        xsltApplyTemplatesComp(style, node);
        break;
        case XSLT_FUNC_WITHPARAM:              
        xsltWithParamComp(style, node);
        break;
        case XSLT_FUNC_VALUEOF:     
        xsltValueOfComp(style, node);
        break;
        case XSLT_FUNC_COPY:        
        xsltCopyComp(style, node);
        break;
        case XSLT_FUNC_COPYOF:
        xsltCopyOfComp(style, node);
        break;
        case XSLT_FUNC_IF:      
        xsltIfComp(style, node);
        break;
        case XSLT_FUNC_CHOOSE:      
        xsltChooseComp(style, node);
        break;
        case XSLT_FUNC_WHEN:        
        xsltWhenComp(style, node);
        break;
        case XSLT_FUNC_OTHERWISE:       
        /* NOP yet */
        return;
        case XSLT_FUNC_FOREACH:     
        xsltForEachComp(style, node);
        break;
        case XSLT_FUNC_APPLYIMPORTS:        
        xsltApplyImportsComp(style, node);
        break;
        case XSLT_FUNC_ATTRIBUTE:       
        xsltAttributeComp(style, node);
        break;
        case XSLT_FUNC_ELEMENT:     
        xsltElementComp(style, node);
        break;
        case XSLT_FUNC_SORT:        
        xsltSortComp(style, node);
        break;
        case XSLT_FUNC_COMMENT:     
        xsltCommentComp(style, node);
        break;
        case XSLT_FUNC_NUMBER:      
        xsltNumberComp(style, node);
        break;
        case XSLT_FUNC_PI:      
        xsltProcessingInstructionComp(style, node);
        break;
        case XSLT_FUNC_CALLTEMPLATE:        
        xsltCallTemplateComp(style, node);
        break;
        case XSLT_FUNC_PARAM:       
        xsltParamComp(style, node);
        break;
        case XSLT_FUNC_VARIABLE:        
        xsltVariableComp(style, node);
        break;
        case XSLT_FUNC_FALLBACK:        
        /* NOP yet */
        return;
        case XSLT_FUNC_DOCUMENT:        
        /* The extra one */
        node->psvi = (void *) xsltDocumentComp(style, node,
            (xsltTransformFunction) xsltDocumentElem);
        break;
        case XSLT_FUNC_MESSAGE:
        /* NOP yet */
        return;
        default:
        /*
        * NOTE that xsl:text, xsl:template, xsl:stylesheet,
        *  xsl:transform, xsl:import, xsl:include are not expected
        *  to be handed over to this function.
        */
        xsltTransformError(NULL, style, node,
            "Internal error: (xsltStylePreCompute) cannot handle "
            "the XSLT element '%s'.\n", node->name);
        style->errors++;
        return;
    }
    } else {
    /*
    * Fallback to string comparison.
    */  
    if (IS_XSLT_NAME(node, "apply-templates")) {
        xsltApplyTemplatesComp(style, node);
    } else if (IS_XSLT_NAME(node, "with-param")) {
        xsltWithParamComp(style, node);
    } else if (IS_XSLT_NAME(node, "value-of")) {
        xsltValueOfComp(style, node);
    } else if (IS_XSLT_NAME(node, "copy")) {
        xsltCopyComp(style, node);
    } else if (IS_XSLT_NAME(node, "copy-of")) {
        xsltCopyOfComp(style, node);
    } else if (IS_XSLT_NAME(node, "if")) {
        xsltIfComp(style, node);
    } else if (IS_XSLT_NAME(node, "choose")) {
        xsltChooseComp(style, node);
    } else if (IS_XSLT_NAME(node, "when")) {
        xsltWhenComp(style, node);  
    } else if (IS_XSLT_NAME(node, "otherwise")) {
        /* NOP yet */
        return;
    } else if (IS_XSLT_NAME(node, "for-each")) {
        xsltForEachComp(style, node);
    } else if (IS_XSLT_NAME(node, "apply-imports")) {
        xsltApplyImportsComp(style, node);
    } else if (IS_XSLT_NAME(node, "attribute")) {
        xsltAttributeComp(style, node);
    } else if (IS_XSLT_NAME(node, "element")) {
        xsltElementComp(style, node);
    } else if (IS_XSLT_NAME(node, "sort")) {
        xsltSortComp(style, node);
    } else if (IS_XSLT_NAME(node, "comment")) {
        xsltCommentComp(style, node);
    } else if (IS_XSLT_NAME(node, "number")) {
        xsltNumberComp(style, node);
    } else if (IS_XSLT_NAME(node, "processing-instruction")) {
        xsltProcessingInstructionComp(style, node);
    } else if (IS_XSLT_NAME(node, "call-template")) {
        xsltCallTemplateComp(style, node);
    } else if (IS_XSLT_NAME(node, "param")) {
        xsltParamComp(style, node);
    } else if (IS_XSLT_NAME(node, "variable")) {
        xsltVariableComp(style, node);
    } else if (IS_XSLT_NAME(node, "fallback")) {
        /* NOP yet */
        return;
    } else if (IS_XSLT_NAME(node, "document")) {
        /* The extra one */
        node->psvi = (void *) xsltDocumentComp(style, node,
        (xsltTransformFunction) xsltDocumentElem);  
    } else if (IS_XSLT_NAME(node, "output")) {
        /* Top-level */
        return;
    } else if (IS_XSLT_NAME(node, "preserve-space")) {
        /* Top-level */
        return;
    } else if (IS_XSLT_NAME(node, "strip-space")) {
        /* Top-level */
        return; 
    } else if (IS_XSLT_NAME(node, "key")) {
        /* Top-level */
        return;
    } else if (IS_XSLT_NAME(node, "message")) {
        return;
    } else if (IS_XSLT_NAME(node, "attribute-set")) {
        /* Top-level */
        return;
    } else if (IS_XSLT_NAME(node, "namespace-alias")) {
        /* Top-level */
        return;
    } else if (IS_XSLT_NAME(node, "decimal-format")) {
        /* Top-level */
        return;
    } else if (IS_XSLT_NAME(node, "include")) {
        /* Top-level */             
    } else {
        /*
        * NOTE that xsl:text, xsl:template, xsl:stylesheet,
        *  xsl:transform, xsl:import, xsl:include are not expected
        *  to be handed over to this function.
        */
        xsltTransformError(NULL, style, node,
        "Internal error: (xsltStylePreCompute) cannot handle "
        "the XSLT element '%s'.\n", node->name);
        style->errors++;
        return;
    }   
    }
    /*
    * Assign the current list of in-scope namespaces to the
    * item. This is needed for XPath expressions.
    */
    if (node->psvi != NULL) {
    ((xsltStylePreCompPtr) node->psvi)->inScopeNs =
        XSLT_CCTXT(style)->inode->inScopeNs;
    }
}

#else

void
xsltStylePreCompute(xsltStylesheetPtr style, xmlNodePtr inst) {
    /*
    * URGENT TODO: Normally inst->psvi Should never be reserved here,
    *   BUT: since if we include the same stylesheet from
    *   multiple imports, then the stylesheet will be parsed
    *   again. We simply must not try to compute the stylesheet again.
    * TODO: Get to the point where we don't need to query the
    *   namespace- and local-name of the node, but can evaluate this
    *   using cctxt->style->inode->category;
    */
    if (inst->psvi != NULL)
    return;

    if (IS_XSLT_ELEM(inst)) {
    xsltStylePreCompPtr cur;

    if (IS_XSLT_NAME(inst, "apply-templates")) {
        xsltCheckInstructionElement(style, inst);
        xsltApplyTemplatesComp(style, inst);
    } else if (IS_XSLT_NAME(inst, "with-param")) {
        xsltCheckParentElement(style, inst, BAD_CAST "apply-templates",
                               BAD_CAST "call-template");
        xsltWithParamComp(style, inst);
    } else if (IS_XSLT_NAME(inst, "value-of")) {
        xsltCheckInstructionElement(style, inst);
        xsltValueOfComp(style, inst);
    } else if (IS_XSLT_NAME(inst, "copy")) {
        xsltCheckInstructionElement(style, inst);
        xsltCopyComp(style, inst);
    } else if (IS_XSLT_NAME(inst, "copy-of")) {
        xsltCheckInstructionElement(style, inst);
        xsltCopyOfComp(style, inst);
    } else if (IS_XSLT_NAME(inst, "if")) {
        xsltCheckInstructionElement(style, inst);
        xsltIfComp(style, inst);
    } else if (IS_XSLT_NAME(inst, "when")) {
        xsltCheckParentElement(style, inst, BAD_CAST "choose", NULL);
        xsltWhenComp(style, inst);
    } else if (IS_XSLT_NAME(inst, "choose")) {
        xsltCheckInstructionElement(style, inst);
        xsltChooseComp(style, inst);
    } else if (IS_XSLT_NAME(inst, "for-each")) {
        xsltCheckInstructionElement(style, inst);
        xsltForEachComp(style, inst);
    } else if (IS_XSLT_NAME(inst, "apply-imports")) {
        xsltCheckInstructionElement(style, inst);
        xsltApplyImportsComp(style, inst);
    } else if (IS_XSLT_NAME(inst, "attribute")) {
        xmlNodePtr parent = inst->parent;

        if ((parent == NULL) || (parent->ns == NULL) ||
        ((parent->ns != inst->ns) &&
         (!xmlStrEqual(parent->ns->href, inst->ns->href))) ||
        (!xmlStrEqual(parent->name, BAD_CAST "attribute-set"))) {
        xsltCheckInstructionElement(style, inst);
        }
        xsltAttributeComp(style, inst);
    } else if (IS_XSLT_NAME(inst, "element")) {
        xsltCheckInstructionElement(style, inst);
        xsltElementComp(style, inst);
    } else if (IS_XSLT_NAME(inst, "text")) {
        xsltCheckInstructionElement(style, inst);
        xsltTextComp(style, inst);
    } else if (IS_XSLT_NAME(inst, "sort")) {
        xsltCheckParentElement(style, inst, BAD_CAST "apply-templates",
                               BAD_CAST "for-each");
        xsltSortComp(style, inst);
    } else if (IS_XSLT_NAME(inst, "comment")) {
        xsltCheckInstructionElement(style, inst);
        xsltCommentComp(style, inst);
    } else if (IS_XSLT_NAME(inst, "number")) {
        xsltCheckInstructionElement(style, inst);
        xsltNumberComp(style, inst);
    } else if (IS_XSLT_NAME(inst, "processing-instruction")) {
        xsltCheckInstructionElement(style, inst);
        xsltProcessingInstructionComp(style, inst);
    } else if (IS_XSLT_NAME(inst, "call-template")) {
        xsltCheckInstructionElement(style, inst);
        xsltCallTemplateComp(style, inst);
    } else if (IS_XSLT_NAME(inst, "param")) {      
        if (xsltCheckTopLevelElement(style, inst, 0) == 0)
            xsltCheckInstructionElement(style, inst);
        xsltParamComp(style, inst);
    } else if (IS_XSLT_NAME(inst, "variable")) {
        if (xsltCheckTopLevelElement(style, inst, 0) == 0)
            xsltCheckInstructionElement(style, inst);
        xsltVariableComp(style, inst);
    } else if (IS_XSLT_NAME(inst, "otherwise")) {
        xsltCheckParentElement(style, inst, BAD_CAST "choose", NULL);
        xsltCheckInstructionElement(style, inst);
        return;
    } else if (IS_XSLT_NAME(inst, "template")) {
        xsltCheckTopLevelElement(style, inst, 1);
        return;
    } else if (IS_XSLT_NAME(inst, "output")) {
        xsltCheckTopLevelElement(style, inst, 1);
        return;
    } else if (IS_XSLT_NAME(inst, "preserve-space")) {
        xsltCheckTopLevelElement(style, inst, 1);
        return;
    } else if (IS_XSLT_NAME(inst, "strip-space")) {
        xsltCheckTopLevelElement(style, inst, 1);
        return;
    } else if ((IS_XSLT_NAME(inst, "stylesheet")) ||
               (IS_XSLT_NAME(inst, "transform"))) {
        xmlNodePtr parent = inst->parent;

        if ((parent == NULL) || (parent->type != XML_DOCUMENT_NODE)) {
        xsltTransformError(NULL, style, inst,
            "element %s only allowed only as root element\n",
                   inst->name);
        style->errors++;
        }
        return;
    } else if (IS_XSLT_NAME(inst, "key")) {
        xsltCheckTopLevelElement(style, inst, 1);
        return;
    } else if (IS_XSLT_NAME(inst, "message")) {
        xsltCheckInstructionElement(style, inst);
        return;
    } else if (IS_XSLT_NAME(inst, "attribute-set")) {
        xsltCheckTopLevelElement(style, inst, 1);
        return;
    } else if (IS_XSLT_NAME(inst, "namespace-alias")) {
        xsltCheckTopLevelElement(style, inst, 1);
        return;
    } else if (IS_XSLT_NAME(inst, "include")) {
        xsltCheckTopLevelElement(style, inst, 1);
        return;
    } else if (IS_XSLT_NAME(inst, "import")) {
        xsltCheckTopLevelElement(style, inst, 1);
        return;
    } else if (IS_XSLT_NAME(inst, "decimal-format")) {
        xsltCheckTopLevelElement(style, inst, 1);
        return;
    } else if (IS_XSLT_NAME(inst, "fallback")) {
        xsltCheckInstructionElement(style, inst);
        return;
    } else if (IS_XSLT_NAME(inst, "document")) {
        xsltCheckInstructionElement(style, inst);
        inst->psvi = (void *) xsltDocumentComp(style, inst,
                (xsltTransformFunction) xsltDocumentElem);
    } else {
        xsltTransformError(NULL, style, inst,
         "xsltStylePreCompute: unknown xsl:%s\n", inst->name);
        if (style != NULL) style->warnings++;
    }
    
    cur = (xsltStylePreCompPtr) inst->psvi;
    /*
    * A ns-list is build for every XSLT item in the
    * node-tree. This is needed for XPath expressions.
    */
    if (cur != NULL) {
        int i = 0;

        cur->nsList = xmlGetNsList(inst->doc, inst);
            if (cur->nsList != NULL) {
        while (cur->nsList[i] != NULL)
            i++;
        }
        cur->nsNr = i;
    }
    } else {
    inst->psvi =
        (void *) xsltPreComputeExtModuleElement(style, inst);

    /*
     * Unknown element, maybe registered at the context
     * level. Mark it for later recognition.
     */
    if (inst->psvi == NULL)
        inst->psvi = (void *) xsltExtMarker;
    }
}
#endif /* XSLT_REFACTORED */