/
transform.c
6524 lines (6021 loc) · 183 KB
/
transform.c
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/*
* transform.c: Implementation of the XSL Transformation 1.0 engine
* transform part, i.e. applying a Stylesheet to a document
*
* 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 <limits.h>
#include <string.h>
#include <stdio.h>
#include <stddef.h>
#include <libxml/xmlmemory.h>
#include <libxml/parser.h>
#include <libxml/tree.h>
#include <libxml/valid.h>
#include <libxml/hash.h>
#include <libxml/encoding.h>
#include <libxml/xmlerror.h>
#include <libxml/xpath.h>
#include <libxml/parserInternals.h>
#include <libxml/xpathInternals.h>
#include <libxml/HTMLtree.h>
#include <libxml/debugXML.h>
#include <libxml/uri.h>
#include "xslt.h"
#include "xsltInternals.h"
#include "xsltutils.h"
#include "pattern.h"
#include "transform.h"
#include "variables.h"
#include "numbersInternals.h"
#include "namespaces.h"
#include "attributes.h"
#include "templates.h"
#include "imports.h"
#include "keys.h"
#include "documents.h"
#include "extensions.h"
#include "extra.h"
#include "preproc.h"
#include "security.h"
#ifdef WITH_XSLT_DEBUG
#define WITH_XSLT_DEBUG_EXTRA
#define WITH_XSLT_DEBUG_PROCESS
#define WITH_XSLT_DEBUG_VARIABLE
#endif
#define XSLT_GENERATE_HTML_DOCTYPE
#ifdef XSLT_GENERATE_HTML_DOCTYPE
static int xsltGetHTMLIDs(const xmlChar *version, const xmlChar **publicID,
const xmlChar **systemID);
#endif
int xsltMaxDepth = 3000;
int xsltMaxVars = 15000;
/*
* Useful macros
*/
#ifndef FALSE
# define FALSE (0 == 1)
# define TRUE (!FALSE)
#endif
#define IS_BLANK_NODE(n) \
(((n)->type == XML_TEXT_NODE) && (xsltIsBlank((n)->content)))
/*
* Forward declarations
*/
static xmlNsPtr
xsltCopyNamespaceListInternal(xmlNodePtr node, xmlNsPtr cur);
static xmlNodePtr
xsltCopyTree(xsltTransformContextPtr ctxt, xmlNodePtr invocNode,
xmlNodePtr node, xmlNodePtr insert, int isLRE,
int topElemVisited);
static void
xsltApplySequenceConstructor(xsltTransformContextPtr ctxt,
xmlNodePtr contextNode, xmlNodePtr list,
xsltTemplatePtr templ);
static void
xsltApplyXSLTTemplate(xsltTransformContextPtr ctxt,
xmlNodePtr contextNode,
xmlNodePtr list,
xsltTemplatePtr templ,
xsltStackElemPtr withParams);
/**
* templPush:
* @ctxt: the transformation context
* @value: the template to push on the stack
*
* Push a template on the stack
*
* Returns the new index in the stack or 0 in case of error
*/
static int
templPush(xsltTransformContextPtr ctxt, xsltTemplatePtr value)
{
if (ctxt->templMax == 0) {
ctxt->templMax = 4;
ctxt->templTab =
(xsltTemplatePtr *) xmlMalloc(ctxt->templMax *
sizeof(ctxt->templTab[0]));
if (ctxt->templTab == NULL) {
xmlGenericError(xmlGenericErrorContext, "malloc failed !\n");
return (0);
}
}
else if (ctxt->templNr >= ctxt->templMax) {
ctxt->templMax *= 2;
ctxt->templTab =
(xsltTemplatePtr *) xmlRealloc(ctxt->templTab,
ctxt->templMax *
sizeof(ctxt->templTab[0]));
if (ctxt->templTab == NULL) {
xmlGenericError(xmlGenericErrorContext, "realloc failed !\n");
return (0);
}
}
ctxt->templTab[ctxt->templNr] = value;
ctxt->templ = value;
return (ctxt->templNr++);
}
/**
* templPop:
* @ctxt: the transformation context
*
* Pop a template value from the stack
*
* Returns the stored template value
*/
static xsltTemplatePtr
templPop(xsltTransformContextPtr ctxt)
{
xsltTemplatePtr ret;
if (ctxt->templNr <= 0)
return (0);
ctxt->templNr--;
if (ctxt->templNr > 0)
ctxt->templ = ctxt->templTab[ctxt->templNr - 1];
else
ctxt->templ = (xsltTemplatePtr) 0;
ret = ctxt->templTab[ctxt->templNr];
ctxt->templTab[ctxt->templNr] = 0;
return (ret);
}
/**
* xsltLocalVariablePop:
* @ctxt: the transformation context
* @limitNr: number of variables which should remain
* @level: the depth in the xsl:template's tree
*
* Pops all variable values at the given @depth from the stack.
*
* Returns the stored variable value
* **NOTE:**
* This is an internal routine and should not be called by users!
*/
void
xsltLocalVariablePop(xsltTransformContextPtr ctxt, int limitNr, int level)
{
xsltStackElemPtr variable;
if (ctxt->varsNr <= 0)
return;
do {
if (ctxt->varsNr <= limitNr)
break;
variable = ctxt->varsTab[ctxt->varsNr - 1];
if (variable->level <= level)
break;
if (variable->level >= 0)
xsltFreeStackElemList(variable);
ctxt->varsNr--;
} while (ctxt->varsNr != 0);
if (ctxt->varsNr > 0)
ctxt->vars = ctxt->varsTab[ctxt->varsNr - 1];
else
ctxt->vars = NULL;
}
/**
* xsltTemplateParamsCleanup:
*
* Removes xsl:param and xsl:with-param items from the
* variable-stack. Only xsl:with-param items are not freed.
*/
static void
xsltTemplateParamsCleanup(xsltTransformContextPtr ctxt)
{
xsltStackElemPtr param;
for (; ctxt->varsNr > ctxt->varsBase; ctxt->varsNr--) {
param = ctxt->varsTab[ctxt->varsNr -1];
/*
* Free xsl:param items.
* xsl:with-param items will have a level of -1 or -2.
*/
if (param->level >= 0) {
xsltFreeStackElemList(param);
}
}
if (ctxt->varsNr > 0)
ctxt->vars = ctxt->varsTab[ctxt->varsNr - 1];
else
ctxt->vars = NULL;
}
#ifdef WITH_PROFILER
/**
* profPush:
* @ctxt: the transformation context
* @value: the profiling value to push on the stack
*
* Push a profiling value on the stack
*
* Returns the new index in the stack or 0 in case of error
*/
static int
profPush(xsltTransformContextPtr ctxt, long value)
{
if (ctxt->profMax == 0) {
ctxt->profMax = 4;
ctxt->profTab =
(long *) xmlMalloc(ctxt->profMax * sizeof(ctxt->profTab[0]));
if (ctxt->profTab == NULL) {
xmlGenericError(xmlGenericErrorContext, "malloc failed !\n");
return (0);
}
}
else if (ctxt->profNr >= ctxt->profMax) {
ctxt->profMax *= 2;
ctxt->profTab =
(long *) xmlRealloc(ctxt->profTab,
ctxt->profMax * sizeof(ctxt->profTab[0]));
if (ctxt->profTab == NULL) {
xmlGenericError(xmlGenericErrorContext, "realloc failed !\n");
return (0);
}
}
ctxt->profTab[ctxt->profNr] = value;
ctxt->prof = value;
return (ctxt->profNr++);
}
/**
* profPop:
* @ctxt: the transformation context
*
* Pop a profiling value from the stack
*
* Returns the stored profiling value
*/
static long
profPop(xsltTransformContextPtr ctxt)
{
long ret;
if (ctxt->profNr <= 0)
return (0);
ctxt->profNr--;
if (ctxt->profNr > 0)
ctxt->prof = ctxt->profTab[ctxt->profNr - 1];
else
ctxt->prof = (long) 0;
ret = ctxt->profTab[ctxt->profNr];
ctxt->profTab[ctxt->profNr] = 0;
return (ret);
}
static void
profCallgraphAdd(xsltTemplatePtr templ, xsltTemplatePtr parent)
{
int i;
if (templ->templMax == 0) {
templ->templMax = 4;
templ->templCalledTab =
(xsltTemplatePtr *) xmlMalloc(templ->templMax *
sizeof(templ->templCalledTab[0]));
templ->templCountTab =
(int *) xmlMalloc(templ->templMax *
sizeof(templ->templCountTab[0]));
if (templ->templCalledTab == NULL || templ->templCountTab == NULL) {
xmlGenericError(xmlGenericErrorContext, "malloc failed !\n");
return;
}
}
else if (templ->templNr >= templ->templMax) {
templ->templMax *= 2;
templ->templCalledTab =
(xsltTemplatePtr *) xmlRealloc(templ->templCalledTab,
templ->templMax *
sizeof(templ->templCalledTab[0]));
templ->templCountTab =
(int *) xmlRealloc(templ->templCountTab,
templ->templMax *
sizeof(templ->templCountTab[0]));
if (templ->templCalledTab == NULL || templ->templCountTab == NULL) {
xmlGenericError(xmlGenericErrorContext, "realloc failed !\n");
return;
}
}
for (i = 0; i < templ->templNr; i++) {
if (templ->templCalledTab[i] == parent) {
templ->templCountTab[i]++;
break;
}
}
if (i == templ->templNr) {
/* not found, add new one */
templ->templCalledTab[templ->templNr] = parent;
templ->templCountTab[templ->templNr] = 1;
templ->templNr++;
}
}
#endif /* WITH_PROFILER */
/**
* xsltPreCompEval:
* @ctxt: transform context
* @node: context node
* @comp: precompiled expression
*
* Evaluate a precompiled XPath expression.
*/
static xmlXPathObjectPtr
xsltPreCompEval(xsltTransformContextPtr ctxt, xmlNodePtr node,
xsltStylePreCompPtr comp) {
xmlXPathObjectPtr res;
xmlXPathContextPtr xpctxt;
xmlNodePtr oldXPContextNode;
xmlNsPtr *oldXPNamespaces;
int oldXPProximityPosition, oldXPContextSize, oldXPNsNr;
xpctxt = ctxt->xpathCtxt;
oldXPContextNode = xpctxt->node;
oldXPProximityPosition = xpctxt->proximityPosition;
oldXPContextSize = xpctxt->contextSize;
oldXPNsNr = xpctxt->nsNr;
oldXPNamespaces = xpctxt->namespaces;
xpctxt->node = node;
#ifdef XSLT_REFACTORED
if (comp->inScopeNs != NULL) {
xpctxt->namespaces = comp->inScopeNs->list;
xpctxt->nsNr = comp->inScopeNs->xpathNumber;
} else {
xpctxt->namespaces = NULL;
xpctxt->nsNr = 0;
}
#else
xpctxt->namespaces = comp->nsList;
xpctxt->nsNr = comp->nsNr;
#endif
res = xmlXPathCompiledEval(comp->comp, xpctxt);
xpctxt->node = oldXPContextNode;
xpctxt->proximityPosition = oldXPProximityPosition;
xpctxt->contextSize = oldXPContextSize;
xpctxt->nsNr = oldXPNsNr;
xpctxt->namespaces = oldXPNamespaces;
return(res);
}
/**
* xsltPreCompEvalToBoolean:
* @ctxt: transform context
* @node: context node
* @comp: precompiled expression
*
* Evaluate a precompiled XPath expression as boolean.
*/
static int
xsltPreCompEvalToBoolean(xsltTransformContextPtr ctxt, xmlNodePtr node,
xsltStylePreCompPtr comp) {
int res;
xmlXPathContextPtr xpctxt;
xmlNodePtr oldXPContextNode;
xmlNsPtr *oldXPNamespaces;
int oldXPProximityPosition, oldXPContextSize, oldXPNsNr;
xpctxt = ctxt->xpathCtxt;
oldXPContextNode = xpctxt->node;
oldXPProximityPosition = xpctxt->proximityPosition;
oldXPContextSize = xpctxt->contextSize;
oldXPNsNr = xpctxt->nsNr;
oldXPNamespaces = xpctxt->namespaces;
xpctxt->node = node;
#ifdef XSLT_REFACTORED
if (comp->inScopeNs != NULL) {
xpctxt->namespaces = comp->inScopeNs->list;
xpctxt->nsNr = comp->inScopeNs->xpathNumber;
} else {
xpctxt->namespaces = NULL;
xpctxt->nsNr = 0;
}
#else
xpctxt->namespaces = comp->nsList;
xpctxt->nsNr = comp->nsNr;
#endif
res = xmlXPathCompiledEvalToBoolean(comp->comp, xpctxt);
xpctxt->node = oldXPContextNode;
xpctxt->proximityPosition = oldXPProximityPosition;
xpctxt->contextSize = oldXPContextSize;
xpctxt->nsNr = oldXPNsNr;
xpctxt->namespaces = oldXPNamespaces;
return(res);
}
/************************************************************************
* *
* XInclude default settings *
* *
************************************************************************/
static int xsltDoXIncludeDefault = 0;
/**
* xsltSetXIncludeDefault:
* @xinclude: whether to do XInclude processing
*
* Set whether XInclude should be processed on document being loaded by default
*/
void
xsltSetXIncludeDefault(int xinclude) {
xsltDoXIncludeDefault = (xinclude != 0);
}
/**
* xsltGetXIncludeDefault:
*
* Provides the default state for XInclude processing
*
* Returns 0 if there is no processing 1 otherwise
*/
int
xsltGetXIncludeDefault(void) {
return(xsltDoXIncludeDefault);
}
static unsigned long xsltDefaultTrace = (unsigned long) XSLT_TRACE_ALL;
/**
* xsltDebugSetDefaultTrace:
* @val: tracing level mask
*
* Set the default debug tracing level mask
*/
void xsltDebugSetDefaultTrace(xsltDebugTraceCodes val) {
xsltDefaultTrace = val;
}
/**
* xsltDebugGetDefaultTrace:
*
* Get the current default debug tracing level mask
*
* Returns the current default debug tracing level mask
*/
xsltDebugTraceCodes xsltDebugGetDefaultTrace() {
return xsltDefaultTrace;
}
/************************************************************************
* *
* Handling of Transformation Contexts *
* *
************************************************************************/
static xsltTransformCachePtr
xsltTransformCacheCreate(void)
{
xsltTransformCachePtr ret;
ret = (xsltTransformCachePtr) xmlMalloc(sizeof(xsltTransformCache));
if (ret == NULL) {
xsltTransformError(NULL, NULL, NULL,
"xsltTransformCacheCreate : malloc failed\n");
return(NULL);
}
memset(ret, 0, sizeof(xsltTransformCache));
return(ret);
}
static void
xsltTransformCacheFree(xsltTransformCachePtr cache)
{
if (cache == NULL)
return;
/*
* Free tree fragments.
*/
if (cache->RVT) {
xmlDocPtr tmp, cur = cache->RVT;
while (cur) {
tmp = cur;
cur = (xmlDocPtr) cur->next;
if (tmp->_private != NULL) {
/*
* Tree the document info.
*/
xsltFreeDocumentKeys((xsltDocumentPtr) tmp->_private);
xmlFree(tmp->_private);
}
xmlFreeDoc(tmp);
}
}
/*
* Free vars/params.
*/
if (cache->stackItems) {
xsltStackElemPtr tmp, cur = cache->stackItems;
while (cur) {
tmp = cur;
cur = cur->next;
/*
* REVISIT TODO: Should be call a destruction-function
* instead?
*/
xmlFree(tmp);
}
}
xmlFree(cache);
}
/**
* xsltNewTransformContext:
* @style: a parsed XSLT stylesheet
* @doc: the input document
*
* Create a new XSLT TransformContext
*
* Returns the newly allocated xsltTransformContextPtr or NULL in case of error
*/
xsltTransformContextPtr
xsltNewTransformContext(xsltStylesheetPtr style, xmlDocPtr doc) {
xsltTransformContextPtr cur;
xsltDocumentPtr docu;
int i;
xsltInitGlobals();
cur = (xsltTransformContextPtr) xmlMalloc(sizeof(xsltTransformContext));
if (cur == NULL) {
xsltTransformError(NULL, NULL, (xmlNodePtr)doc,
"xsltNewTransformContext : malloc failed\n");
return(NULL);
}
memset(cur, 0, sizeof(xsltTransformContext));
cur->cache = xsltTransformCacheCreate();
if (cur->cache == NULL)
goto internal_err;
/*
* setup of the dictionary must be done early as some of the
* processing later like key handling may need it.
*/
cur->dict = xmlDictCreateSub(style->dict);
cur->internalized = ((style->internalized) && (cur->dict != NULL));
#ifdef WITH_XSLT_DEBUG
xsltGenericDebug(xsltGenericDebugContext,
"Creating sub-dictionary from stylesheet for transformation\n");
#endif
/*
* initialize the template stack
*/
cur->templTab = (xsltTemplatePtr *)
xmlMalloc(10 * sizeof(xsltTemplatePtr));
if (cur->templTab == NULL) {
xsltTransformError(NULL, NULL, (xmlNodePtr) doc,
"xsltNewTransformContext: out of memory\n");
goto internal_err;
}
cur->templNr = 0;
cur->templMax = 5;
cur->templ = NULL;
cur->maxTemplateDepth = xsltMaxDepth;
/*
* initialize the variables stack
*/
cur->varsTab = (xsltStackElemPtr *)
xmlMalloc(10 * sizeof(xsltStackElemPtr));
if (cur->varsTab == NULL) {
xmlGenericError(xmlGenericErrorContext,
"xsltNewTransformContext: out of memory\n");
goto internal_err;
}
cur->varsNr = 0;
cur->varsMax = 10;
cur->vars = NULL;
cur->varsBase = 0;
cur->maxTemplateVars = xsltMaxVars;
/*
* the profiling stack is not initialized by default
*/
cur->profTab = NULL;
cur->profNr = 0;
cur->profMax = 0;
cur->prof = 0;
cur->style = style;
xmlXPathInit();
cur->xpathCtxt = xmlXPathNewContext(doc);
if (cur->xpathCtxt == NULL) {
xsltTransformError(NULL, NULL, (xmlNodePtr) doc,
"xsltNewTransformContext : xmlXPathNewContext failed\n");
goto internal_err;
}
/*
* Create an XPath cache.
*/
if (xmlXPathContextSetCache(cur->xpathCtxt, 1, -1, 0) == -1)
goto internal_err;
/*
* Initialize the extras array
*/
if (style->extrasNr != 0) {
cur->extrasMax = style->extrasNr + 20;
cur->extras = (xsltRuntimeExtraPtr)
xmlMalloc(cur->extrasMax * sizeof(xsltRuntimeExtra));
if (cur->extras == NULL) {
xmlGenericError(xmlGenericErrorContext,
"xsltNewTransformContext: out of memory\n");
goto internal_err;
}
cur->extrasNr = style->extrasNr;
for (i = 0;i < cur->extrasMax;i++) {
cur->extras[i].info = NULL;
cur->extras[i].deallocate = NULL;
cur->extras[i].val.ptr = NULL;
}
} else {
cur->extras = NULL;
cur->extrasNr = 0;
cur->extrasMax = 0;
}
XSLT_REGISTER_VARIABLE_LOOKUP(cur);
XSLT_REGISTER_FUNCTION_LOOKUP(cur);
cur->xpathCtxt->nsHash = style->nsHash;
/*
* Initialize the registered external modules
*/
xsltInitCtxtExts(cur);
/*
* Setup document element ordering for later efficiencies
* (bug 133289)
*/
if (xslDebugStatus == XSLT_DEBUG_NONE)
xmlXPathOrderDocElems(doc);
/*
* Must set parserOptions before calling xsltNewDocument
* (bug 164530)
*/
cur->parserOptions = XSLT_PARSE_OPTIONS;
docu = xsltNewDocument(cur, doc);
if (docu == NULL) {
xsltTransformError(cur, NULL, (xmlNodePtr)doc,
"xsltNewTransformContext : xsltNewDocument failed\n");
goto internal_err;
}
docu->main = 1;
cur->document = docu;
cur->inst = NULL;
cur->outputFile = NULL;
cur->sec = xsltGetDefaultSecurityPrefs();
cur->debugStatus = xslDebugStatus;
cur->traceCode = (unsigned long*) &xsltDefaultTrace;
cur->xinclude = xsltGetXIncludeDefault();
cur->keyInitLevel = 0;
return(cur);
internal_err:
if (cur != NULL)
xsltFreeTransformContext(cur);
return(NULL);
}
/**
* xsltFreeTransformContext:
* @ctxt: an XSLT parser context
*
* Free up the memory allocated by @ctxt
*/
void
xsltFreeTransformContext(xsltTransformContextPtr ctxt) {
if (ctxt == NULL)
return;
/*
* Shutdown the extension modules associated to the stylesheet
* used if needed.
*/
xsltShutdownCtxtExts(ctxt);
if (ctxt->xpathCtxt != NULL) {
ctxt->xpathCtxt->nsHash = NULL;
xmlXPathFreeContext(ctxt->xpathCtxt);
}
if (ctxt->templTab != NULL)
xmlFree(ctxt->templTab);
if (ctxt->varsTab != NULL)
xmlFree(ctxt->varsTab);
if (ctxt->profTab != NULL)
xmlFree(ctxt->profTab);
if ((ctxt->extrasNr > 0) && (ctxt->extras != NULL)) {
int i;
for (i = 0;i < ctxt->extrasNr;i++) {
if ((ctxt->extras[i].deallocate != NULL) &&
(ctxt->extras[i].info != NULL))
ctxt->extras[i].deallocate(ctxt->extras[i].info);
}
xmlFree(ctxt->extras);
}
xsltFreeGlobalVariables(ctxt);
xsltFreeDocuments(ctxt);
xsltFreeCtxtExts(ctxt);
xsltFreeRVTs(ctxt);
xsltTransformCacheFree(ctxt->cache);
xmlDictFree(ctxt->dict);
#ifdef WITH_XSLT_DEBUG
xsltGenericDebug(xsltGenericDebugContext,
"freeing transformation dictionary\n");
#endif
memset(ctxt, -1, sizeof(xsltTransformContext));
xmlFree(ctxt);
}
/************************************************************************
* *
* Copy of Nodes in an XSLT fashion *
* *
************************************************************************/
/**
* xsltAddChild:
* @parent: the parent node
* @cur: the child node
*
* Wrapper version of xmlAddChild with a more consistent behaviour on
* error. One expect the use to be child = xsltAddChild(parent, child);
* and the routine will take care of not leaking on errors or node merge
*
* Returns the child is successfully attached or NULL if merged or freed
*/
static xmlNodePtr
xsltAddChild(xmlNodePtr parent, xmlNodePtr cur) {
xmlNodePtr ret;
if (cur == NULL)
return(NULL);
if (parent == NULL) {
xmlFreeNode(cur);
return(NULL);
}
ret = xmlAddChild(parent, cur);
return(ret);
}
/**
* xsltAddTextString:
* @ctxt: a XSLT process context
* @target: the text node where the text will be attached
* @string: the text string
* @len: the string length in byte
*
* Extend the current text node with the new string, it handles coalescing
*
* Returns: the text node
*/
static xmlNodePtr
xsltAddTextString(xsltTransformContextPtr ctxt, xmlNodePtr target,
const xmlChar *string, int len) {
/*
* optimization
*/
if ((len <= 0) || (string == NULL) || (target == NULL))
return(target);
if (ctxt->lasttext == target->content) {
int minSize;
/* Check for integer overflow accounting for NUL terminator. */
if (len >= INT_MAX - ctxt->lasttuse) {
xsltTransformError(ctxt, NULL, target,
"xsltCopyText: text allocation failed\n");
return(NULL);
}
minSize = ctxt->lasttuse + len + 1;
if (ctxt->lasttsize < minSize) {
xmlChar *newbuf;
int size;
int extra;
/* Double buffer size but increase by at least 100 bytes. */
extra = minSize < 100 ? 100 : minSize;
/* Check for integer overflow. */
if (extra > INT_MAX - ctxt->lasttsize) {
size = INT_MAX;
}
else {
size = ctxt->lasttsize + extra;
}
newbuf = (xmlChar *) xmlRealloc(target->content,size);
if (newbuf == NULL) {
xsltTransformError(ctxt, NULL, target,
"xsltCopyText: text allocation failed\n");
return(NULL);
}
ctxt->lasttsize = size;
ctxt->lasttext = newbuf;
target->content = newbuf;
}
memcpy(&(target->content[ctxt->lasttuse]), string, len);
ctxt->lasttuse += len;
target->content[ctxt->lasttuse] = 0;
} else {
xmlNodeAddContent(target, string);
ctxt->lasttext = target->content;
len = xmlStrlen(target->content);
ctxt->lasttsize = len;
ctxt->lasttuse = len;
}
return(target);
}
/**
* xsltCopyTextString:
* @ctxt: a XSLT process context
* @target: the element where the text will be attached
* @string: the text string
* @noescape: should disable-escaping be activated for this text node.
*
* Adds @string to a newly created or an existent text node child of
* @target.
*
* Returns: the text node, where the text content of @cur is copied to.
* NULL in case of API or internal errors.
*/
xmlNodePtr
xsltCopyTextString(xsltTransformContextPtr ctxt, xmlNodePtr target,
const xmlChar *string, int noescape)
{
xmlNodePtr copy;
int len;
if (string == NULL)
return(NULL);
#ifdef WITH_XSLT_DEBUG_PROCESS
XSLT_TRACE(ctxt,XSLT_TRACE_COPY_TEXT,xsltGenericDebug(xsltGenericDebugContext,
"xsltCopyTextString: copy text %s\n",
string));
#endif
/*
* Play safe and reset the merging mechanism for every new
* target node.
*/
if ((target == NULL) || (target->children == NULL)) {
ctxt->lasttext = NULL;
}
/* handle coalescing of text nodes here */
len = xmlStrlen(string);
if ((ctxt->type == XSLT_OUTPUT_XML) &&
(ctxt->style->cdataSection != NULL) &&
(target != NULL) &&
(target->type == XML_ELEMENT_NODE) &&
(((target->ns == NULL) &&
(xmlHashLookup2(ctxt->style->cdataSection,
target->name, NULL) != NULL)) ||
((target->ns != NULL) &&
(xmlHashLookup2(ctxt->style->cdataSection,
target->name, target->ns->href) != NULL))))
{
/*
* Process "cdata-section-elements".
*/
if ((target->last != NULL) &&
(target->last->type == XML_CDATA_SECTION_NODE))
{
return(xsltAddTextString(ctxt, target->last, string, len));
}
copy = xmlNewCDataBlock(ctxt->output, string, len);
} else if (noescape) {
/*
* Process "disable-output-escaping".
*/
if ((target != NULL) && (target->last != NULL) &&
(target->last->type == XML_TEXT_NODE) &&
(target->last->name == xmlStringTextNoenc))
{
return(xsltAddTextString(ctxt, target->last, string, len));
}
copy = xmlNewTextLen(string, len);
if (copy != NULL)
copy->name = xmlStringTextNoenc;
} else {
/*
* Default processing.
*/
if ((target != NULL) && (target->last != NULL) &&
(target->last->type == XML_TEXT_NODE) &&
(target->last->name == xmlStringText)) {
return(xsltAddTextString(ctxt, target->last, string, len));
}
copy = xmlNewTextLen(string, len);
}
if (copy != NULL && target != NULL)
copy = xsltAddChild(target, copy);
if (copy != NULL) {
ctxt->lasttext = copy->content;
ctxt->lasttsize = len;
ctxt->lasttuse = len;
} else {
xsltTransformError(ctxt, NULL, target,
"xsltCopyTextString: text copy failed\n");
ctxt->lasttext = NULL;
}
return(copy);
}
/**
* xsltCopyText:
* @ctxt: a XSLT process context
* @target: the element where the text will be attached
* @cur: the text or CDATA node
* @interned: the string is in the target doc dictionary
*
* Copy the text content of @cur and append it to @target's children.
*
* Returns: the text node, where the text content of @cur is copied to.
* NULL in case of API or internal errors.
*/
static xmlNodePtr
xsltCopyText(xsltTransformContextPtr ctxt, xmlNodePtr target,
xmlNodePtr cur, int interned)
{
xmlNodePtr copy;
if ((cur->type != XML_TEXT_NODE) &&
(cur->type != XML_CDATA_SECTION_NODE))
return(NULL);
if (cur->content == NULL)
return(NULL);
#ifdef WITH_XSLT_DEBUG_PROCESS
if (cur->type == XML_CDATA_SECTION_NODE) {
XSLT_TRACE(ctxt,XSLT_TRACE_COPY_TEXT,xsltGenericDebug(xsltGenericDebugContext,
"xsltCopyText: copy CDATA text %s\n",
cur->content));
} else if (cur->name == xmlStringTextNoenc) {
XSLT_TRACE(ctxt,XSLT_TRACE_COPY_TEXT,xsltGenericDebug(xsltGenericDebugContext,
"xsltCopyText: copy unescaped text %s\n",
cur->content));