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2624 lines (2454 loc) · 67.5 KB
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/*
* xinclude.c : Code to implement XInclude processing
*
* World Wide Web Consortium W3C Last Call Working Draft 10 November 2003
* http://www.w3.org/TR/2003/WD-xinclude-20031110
*
* See Copyright for the status of this software.
*
*/
#define IN_LIBXML
#include "libxml.h"
#include <string.h>
#include <libxml/xmlmemory.h>
#include <libxml/tree.h>
#include <libxml/parser.h>
#include <libxml/uri.h>
#include <libxml/xpath.h>
#include <libxml/xpointer.h>
#include <libxml/parserInternals.h>
#include <libxml/xmlerror.h>
#include <libxml/encoding.h>
#include <libxml/globals.h>
#ifdef LIBXML_XINCLUDE_ENABLED
#include <libxml/xinclude.h>
#include "buf.h"
#define XINCLUDE_MAX_DEPTH 40
/* #define DEBUG_XINCLUDE */
#ifdef DEBUG_XINCLUDE
#ifdef LIBXML_DEBUG_ENABLED
#include <libxml/debugXML.h>
#endif
#endif
/************************************************************************
* *
* XInclude context handling *
* *
************************************************************************/
/*
* An XInclude context
*/
typedef xmlChar *xmlURL;
typedef struct _xmlXIncludeRef xmlXIncludeRef;
typedef xmlXIncludeRef *xmlXIncludeRefPtr;
struct _xmlXIncludeRef {
xmlChar *URI; /* the fully resolved resource URL */
xmlChar *fragment; /* the fragment in the URI */
xmlDocPtr doc; /* the parsed document */
xmlNodePtr ref; /* the node making the reference in the source */
xmlNodePtr inc; /* the included copy */
int xml; /* xml or txt */
int count; /* how many refs use that specific doc */
xmlXPathObjectPtr xptr; /* the xpointer if needed */
int emptyFb; /* flag to show fallback empty */
};
struct _xmlXIncludeCtxt {
xmlDocPtr doc; /* the source document */
int incBase; /* the first include for this document */
int incNr; /* number of includes */
int incMax; /* size of includes tab */
xmlXIncludeRefPtr *incTab; /* array of included references */
int txtNr; /* number of unparsed documents */
int txtMax; /* size of unparsed documents tab */
xmlNodePtr *txtTab; /* array of unparsed text nodes */
xmlURL *txturlTab; /* array of unparsed text URLs */
xmlChar * url; /* the current URL processed */
int urlNr; /* number of URLs stacked */
int urlMax; /* size of URL stack */
xmlChar * *urlTab; /* URL stack */
int nbErrors; /* the number of errors detected */
int legacy; /* using XINCLUDE_OLD_NS */
int parseFlags; /* the flags used for parsing XML documents */
xmlChar * base; /* the current xml:base */
void *_private; /* application data */
};
static int
xmlXIncludeDoProcess(xmlXIncludeCtxtPtr ctxt, xmlDocPtr doc, xmlNodePtr tree);
/************************************************************************
* *
* XInclude error handler *
* *
************************************************************************/
/**
* xmlXIncludeErrMemory:
* @extra: extra information
*
* Handle an out of memory condition
*/
static void
xmlXIncludeErrMemory(xmlXIncludeCtxtPtr ctxt, xmlNodePtr node,
const char *extra)
{
if (ctxt != NULL)
ctxt->nbErrors++;
__xmlRaiseError(NULL, NULL, NULL, ctxt, node, XML_FROM_XINCLUDE,
XML_ERR_NO_MEMORY, XML_ERR_ERROR, NULL, 0,
extra, NULL, NULL, 0, 0,
"Memory allocation failed : %s\n", extra);
}
/**
* xmlXIncludeErr:
* @ctxt: the XInclude context
* @node: the context node
* @msg: the error message
* @extra: extra information
*
* Handle an XInclude error
*/
static void LIBXML_ATTR_FORMAT(4,0)
xmlXIncludeErr(xmlXIncludeCtxtPtr ctxt, xmlNodePtr node, int error,
const char *msg, const xmlChar *extra)
{
if (ctxt != NULL)
ctxt->nbErrors++;
__xmlRaiseError(NULL, NULL, NULL, ctxt, node, XML_FROM_XINCLUDE,
error, XML_ERR_ERROR, NULL, 0,
(const char *) extra, NULL, NULL, 0, 0,
msg, (const char *) extra);
}
#if 0
/**
* xmlXIncludeWarn:
* @ctxt: the XInclude context
* @node: the context node
* @msg: the error message
* @extra: extra information
*
* Emit an XInclude warning.
*/
static void LIBXML_ATTR_FORMAT(4,0)
xmlXIncludeWarn(xmlXIncludeCtxtPtr ctxt, xmlNodePtr node, int error,
const char *msg, const xmlChar *extra)
{
__xmlRaiseError(NULL, NULL, NULL, ctxt, node, XML_FROM_XINCLUDE,
error, XML_ERR_WARNING, NULL, 0,
(const char *) extra, NULL, NULL, 0, 0,
msg, (const char *) extra);
}
#endif
/**
* xmlXIncludeGetProp:
* @ctxt: the XInclude context
* @cur: the node
* @name: the attribute name
*
* Get an XInclude attribute
*
* Returns the value (to be freed) or NULL if not found
*/
static xmlChar *
xmlXIncludeGetProp(xmlXIncludeCtxtPtr ctxt, xmlNodePtr cur,
const xmlChar *name) {
xmlChar *ret;
ret = xmlGetNsProp(cur, XINCLUDE_NS, name);
if (ret != NULL)
return(ret);
if (ctxt->legacy != 0) {
ret = xmlGetNsProp(cur, XINCLUDE_OLD_NS, name);
if (ret != NULL)
return(ret);
}
ret = xmlGetProp(cur, name);
return(ret);
}
/**
* xmlXIncludeFreeRef:
* @ref: the XInclude reference
*
* Free an XInclude reference
*/
static void
xmlXIncludeFreeRef(xmlXIncludeRefPtr ref) {
if (ref == NULL)
return;
#ifdef DEBUG_XINCLUDE
xmlGenericError(xmlGenericErrorContext, "Freeing ref\n");
#endif
if (ref->doc != NULL) {
#ifdef DEBUG_XINCLUDE
xmlGenericError(xmlGenericErrorContext, "Freeing doc %s\n", ref->URI);
#endif
xmlFreeDoc(ref->doc);
}
if (ref->URI != NULL)
xmlFree(ref->URI);
if (ref->fragment != NULL)
xmlFree(ref->fragment);
if (ref->xptr != NULL)
xmlXPathFreeObject(ref->xptr);
xmlFree(ref);
}
/**
* xmlXIncludeNewRef:
* @ctxt: the XInclude context
* @URI: the resource URI
*
* Creates a new reference within an XInclude context
*
* Returns the new set
*/
static xmlXIncludeRefPtr
xmlXIncludeNewRef(xmlXIncludeCtxtPtr ctxt, const xmlChar *URI,
xmlNodePtr ref) {
xmlXIncludeRefPtr ret;
#ifdef DEBUG_XINCLUDE
xmlGenericError(xmlGenericErrorContext, "New ref %s\n", URI);
#endif
ret = (xmlXIncludeRefPtr) xmlMalloc(sizeof(xmlXIncludeRef));
if (ret == NULL) {
xmlXIncludeErrMemory(ctxt, ref, "growing XInclude context");
return(NULL);
}
memset(ret, 0, sizeof(xmlXIncludeRef));
if (URI == NULL)
ret->URI = NULL;
else
ret->URI = xmlStrdup(URI);
ret->fragment = NULL;
ret->ref = ref;
ret->doc = NULL;
ret->count = 0;
ret->xml = 0;
ret->inc = NULL;
if (ctxt->incMax == 0) {
ctxt->incMax = 4;
ctxt->incTab = (xmlXIncludeRefPtr *) xmlMalloc(ctxt->incMax *
sizeof(ctxt->incTab[0]));
if (ctxt->incTab == NULL) {
xmlXIncludeErrMemory(ctxt, ref, "growing XInclude context");
xmlXIncludeFreeRef(ret);
return(NULL);
}
}
if (ctxt->incNr >= ctxt->incMax) {
ctxt->incMax *= 2;
ctxt->incTab = (xmlXIncludeRefPtr *) xmlRealloc(ctxt->incTab,
ctxt->incMax * sizeof(ctxt->incTab[0]));
if (ctxt->incTab == NULL) {
xmlXIncludeErrMemory(ctxt, ref, "growing XInclude context");
xmlXIncludeFreeRef(ret);
return(NULL);
}
}
ctxt->incTab[ctxt->incNr++] = ret;
return(ret);
}
/**
* xmlXIncludeNewContext:
* @doc: an XML Document
*
* Creates a new XInclude context
*
* Returns the new set
*/
xmlXIncludeCtxtPtr
xmlXIncludeNewContext(xmlDocPtr doc) {
xmlXIncludeCtxtPtr ret;
#ifdef DEBUG_XINCLUDE
xmlGenericError(xmlGenericErrorContext, "New context\n");
#endif
if (doc == NULL)
return(NULL);
ret = (xmlXIncludeCtxtPtr) xmlMalloc(sizeof(xmlXIncludeCtxt));
if (ret == NULL) {
xmlXIncludeErrMemory(NULL, (xmlNodePtr) doc,
"creating XInclude context");
return(NULL);
}
memset(ret, 0, sizeof(xmlXIncludeCtxt));
ret->doc = doc;
ret->incNr = 0;
ret->incBase = 0;
ret->incMax = 0;
ret->incTab = NULL;
ret->nbErrors = 0;
return(ret);
}
/**
* xmlXIncludeURLPush:
* @ctxt: the parser context
* @value: the url
*
* Pushes a new url on top of the url stack
*
* Returns -1 in case of error, the index in the stack otherwise
*/
static int
xmlXIncludeURLPush(xmlXIncludeCtxtPtr ctxt,
const xmlChar *value)
{
if (ctxt->urlNr > XINCLUDE_MAX_DEPTH) {
xmlXIncludeErr(ctxt, NULL, XML_XINCLUDE_RECURSION,
"detected a recursion in %s\n", value);
return(-1);
}
if (ctxt->urlTab == NULL) {
ctxt->urlMax = 4;
ctxt->urlNr = 0;
ctxt->urlTab = (xmlChar * *) xmlMalloc(
ctxt->urlMax * sizeof(ctxt->urlTab[0]));
if (ctxt->urlTab == NULL) {
xmlXIncludeErrMemory(ctxt, NULL, "adding URL");
return (-1);
}
}
if (ctxt->urlNr >= ctxt->urlMax) {
ctxt->urlMax *= 2;
ctxt->urlTab =
(xmlChar * *) xmlRealloc(ctxt->urlTab,
ctxt->urlMax *
sizeof(ctxt->urlTab[0]));
if (ctxt->urlTab == NULL) {
xmlXIncludeErrMemory(ctxt, NULL, "adding URL");
return (-1);
}
}
ctxt->url = ctxt->urlTab[ctxt->urlNr] = xmlStrdup(value);
return (ctxt->urlNr++);
}
/**
* xmlXIncludeURLPop:
* @ctxt: the parser context
*
* Pops the top URL from the URL stack
*/
static void
xmlXIncludeURLPop(xmlXIncludeCtxtPtr ctxt)
{
xmlChar * ret;
if (ctxt->urlNr <= 0)
return;
ctxt->urlNr--;
if (ctxt->urlNr > 0)
ctxt->url = ctxt->urlTab[ctxt->urlNr - 1];
else
ctxt->url = NULL;
ret = ctxt->urlTab[ctxt->urlNr];
ctxt->urlTab[ctxt->urlNr] = NULL;
if (ret != NULL)
xmlFree(ret);
}
/**
* xmlXIncludeFreeContext:
* @ctxt: the XInclude context
*
* Free an XInclude context
*/
void
xmlXIncludeFreeContext(xmlXIncludeCtxtPtr ctxt) {
int i;
#ifdef DEBUG_XINCLUDE
xmlGenericError(xmlGenericErrorContext, "Freeing context\n");
#endif
if (ctxt == NULL)
return;
while (ctxt->urlNr > 0)
xmlXIncludeURLPop(ctxt);
if (ctxt->urlTab != NULL)
xmlFree(ctxt->urlTab);
for (i = 0;i < ctxt->incNr;i++) {
if (ctxt->incTab[i] != NULL)
xmlXIncludeFreeRef(ctxt->incTab[i]);
}
if (ctxt->txturlTab != NULL) {
for (i = 0;i < ctxt->txtNr;i++) {
if (ctxt->txturlTab[i] != NULL)
xmlFree(ctxt->txturlTab[i]);
}
}
if (ctxt->incTab != NULL)
xmlFree(ctxt->incTab);
if (ctxt->txtTab != NULL)
xmlFree(ctxt->txtTab);
if (ctxt->txturlTab != NULL)
xmlFree(ctxt->txturlTab);
if (ctxt->base != NULL) {
xmlFree(ctxt->base);
}
xmlFree(ctxt);
}
/**
* xmlXIncludeParseFile:
* @ctxt: the XInclude context
* @URL: the URL or file path
*
* parse a document for XInclude
*/
static xmlDocPtr
xmlXIncludeParseFile(xmlXIncludeCtxtPtr ctxt, const char *URL) {
xmlDocPtr ret;
xmlParserCtxtPtr pctxt;
xmlParserInputPtr inputStream;
xmlInitParser();
pctxt = xmlNewParserCtxt();
if (pctxt == NULL) {
xmlXIncludeErrMemory(ctxt, NULL, "cannot allocate parser context");
return(NULL);
}
/*
* pass in the application data to the parser context.
*/
pctxt->_private = ctxt->_private;
/*
* try to ensure that new documents included are actually
* built with the same dictionary as the including document.
*/
if ((ctxt->doc != NULL) && (ctxt->doc->dict != NULL)) {
if (pctxt->dict != NULL)
xmlDictFree(pctxt->dict);
pctxt->dict = ctxt->doc->dict;
xmlDictReference(pctxt->dict);
}
xmlCtxtUseOptions(pctxt, ctxt->parseFlags | XML_PARSE_DTDLOAD);
inputStream = xmlLoadExternalEntity(URL, NULL, pctxt);
if (inputStream == NULL) {
xmlFreeParserCtxt(pctxt);
return(NULL);
}
inputPush(pctxt, inputStream);
if (pctxt->directory == NULL)
pctxt->directory = xmlParserGetDirectory(URL);
pctxt->loadsubset |= XML_DETECT_IDS;
xmlParseDocument(pctxt);
if (pctxt->wellFormed) {
ret = pctxt->myDoc;
}
else {
ret = NULL;
if (pctxt->myDoc != NULL)
xmlFreeDoc(pctxt->myDoc);
pctxt->myDoc = NULL;
}
xmlFreeParserCtxt(pctxt);
return(ret);
}
/**
* xmlXIncludeAddNode:
* @ctxt: the XInclude context
* @cur: the new node
*
* Add a new node to process to an XInclude context
*/
static int
xmlXIncludeAddNode(xmlXIncludeCtxtPtr ctxt, xmlNodePtr cur) {
xmlXIncludeRefPtr ref;
xmlURIPtr uri;
xmlChar *URL;
xmlChar *fragment = NULL;
xmlChar *href;
xmlChar *parse;
xmlChar *base;
xmlChar *URI;
int xml = 1, i; /* default Issue 64 */
int local = 0;
if (ctxt == NULL)
return(-1);
if (cur == NULL)
return(-1);
#ifdef DEBUG_XINCLUDE
xmlGenericError(xmlGenericErrorContext, "Add node\n");
#endif
/*
* read the attributes
*/
href = xmlXIncludeGetProp(ctxt, cur, XINCLUDE_HREF);
if (href == NULL) {
href = xmlStrdup(BAD_CAST ""); /* @@@@ href is now optional */
if (href == NULL)
return(-1);
}
if ((href[0] == '#') || (href[0] == 0))
local = 1;
parse = xmlXIncludeGetProp(ctxt, cur, XINCLUDE_PARSE);
if (parse != NULL) {
if (xmlStrEqual(parse, XINCLUDE_PARSE_XML))
xml = 1;
else if (xmlStrEqual(parse, XINCLUDE_PARSE_TEXT))
xml = 0;
else {
xmlXIncludeErr(ctxt, cur, XML_XINCLUDE_PARSE_VALUE,
"invalid value %s for 'parse'\n", parse);
if (href != NULL)
xmlFree(href);
if (parse != NULL)
xmlFree(parse);
return(-1);
}
}
/*
* compute the URI
*/
base = xmlNodeGetBase(ctxt->doc, cur);
if (base == NULL) {
URI = xmlBuildURI(href, ctxt->doc->URL);
} else {
URI = xmlBuildURI(href, base);
}
if (URI == NULL) {
xmlChar *escbase;
xmlChar *eschref;
/*
* Some escaping may be needed
*/
escbase = xmlURIEscape(base);
eschref = xmlURIEscape(href);
URI = xmlBuildURI(eschref, escbase);
if (escbase != NULL)
xmlFree(escbase);
if (eschref != NULL)
xmlFree(eschref);
}
if (parse != NULL)
xmlFree(parse);
if (href != NULL)
xmlFree(href);
if (base != NULL)
xmlFree(base);
if (URI == NULL) {
xmlXIncludeErr(ctxt, cur, XML_XINCLUDE_HREF_URI,
"failed build URL\n", NULL);
return(-1);
}
fragment = xmlXIncludeGetProp(ctxt, cur, XINCLUDE_PARSE_XPOINTER);
/*
* Check the URL and remove any fragment identifier
*/
uri = xmlParseURI((const char *)URI);
if (uri == NULL) {
xmlXIncludeErr(ctxt, cur, XML_XINCLUDE_HREF_URI,
"invalid value URI %s\n", URI);
if (fragment != NULL)
xmlFree(fragment);
xmlFree(URI);
return(-1);
}
if (uri->fragment != NULL) {
if (ctxt->legacy != 0) {
if (fragment == NULL) {
fragment = (xmlChar *) uri->fragment;
} else {
xmlFree(uri->fragment);
}
} else {
xmlXIncludeErr(ctxt, cur, XML_XINCLUDE_FRAGMENT_ID,
"Invalid fragment identifier in URI %s use the xpointer attribute\n",
URI);
if (fragment != NULL)
xmlFree(fragment);
xmlFreeURI(uri);
xmlFree(URI);
return(-1);
}
uri->fragment = NULL;
}
URL = xmlSaveUri(uri);
xmlFreeURI(uri);
xmlFree(URI);
if (URL == NULL) {
xmlXIncludeErr(ctxt, cur, XML_XINCLUDE_HREF_URI,
"invalid value URI %s\n", URI);
if (fragment != NULL)
xmlFree(fragment);
return(-1);
}
/*
* If local and xml then we need a fragment
*/
if ((local == 1) && (xml == 1) &&
((fragment == NULL) || (fragment[0] == 0))) {
xmlXIncludeErr(ctxt, cur, XML_XINCLUDE_RECURSION,
"detected a local recursion with no xpointer in %s\n",
URL);
if (fragment != NULL)
xmlFree(fragment);
return(-1);
}
/*
* Check the URL against the stack for recursions
*/
if ((!local) && (xml == 1)) {
for (i = 0;i < ctxt->urlNr;i++) {
if (xmlStrEqual(URL, ctxt->urlTab[i])) {
xmlXIncludeErr(ctxt, cur, XML_XINCLUDE_RECURSION,
"detected a recursion in %s\n", URL);
return(-1);
}
}
}
ref = xmlXIncludeNewRef(ctxt, URL, cur);
if (ref == NULL) {
return(-1);
}
ref->fragment = fragment;
ref->doc = NULL;
ref->xml = xml;
ref->count = 1;
xmlFree(URL);
return(0);
}
/**
* xmlXIncludeRecurseDoc:
* @ctxt: the XInclude context
* @doc: the new document
* @url: the associated URL
*
* The XInclude recursive nature is handled at this point.
*/
static void
xmlXIncludeRecurseDoc(xmlXIncludeCtxtPtr ctxt, xmlDocPtr doc,
const xmlURL url ATTRIBUTE_UNUSED) {
xmlXIncludeCtxtPtr newctxt;
int i;
/*
* Avoid recursion in already substitued resources
for (i = 0;i < ctxt->urlNr;i++) {
if (xmlStrEqual(doc->URL, ctxt->urlTab[i]))
return;
}
*/
#ifdef DEBUG_XINCLUDE
xmlGenericError(xmlGenericErrorContext, "Recursing in doc %s\n", doc->URL);
#endif
/*
* Handle recursion here.
*/
newctxt = xmlXIncludeNewContext(doc);
if (newctxt != NULL) {
/*
* Copy the private user data
*/
newctxt->_private = ctxt->_private;
/*
* Copy the existing document set
*/
newctxt->incMax = ctxt->incMax;
newctxt->incNr = ctxt->incNr;
newctxt->incTab = (xmlXIncludeRefPtr *) xmlMalloc(newctxt->incMax *
sizeof(newctxt->incTab[0]));
if (newctxt->incTab == NULL) {
xmlXIncludeErrMemory(ctxt, (xmlNodePtr) doc, "processing doc");
xmlFree(newctxt);
return;
}
/*
* copy the urlTab
*/
newctxt->urlMax = ctxt->urlMax;
newctxt->urlNr = ctxt->urlNr;
newctxt->urlTab = ctxt->urlTab;
/*
* Inherit the existing base
*/
newctxt->base = xmlStrdup(ctxt->base);
/*
* Inherit the documents already in use by other includes
*/
newctxt->incBase = ctxt->incNr;
for (i = 0;i < ctxt->incNr;i++) {
newctxt->incTab[i] = ctxt->incTab[i];
newctxt->incTab[i]->count++; /* prevent the recursion from
freeing it */
}
/*
* The new context should also inherit the Parse Flags
* (bug 132597)
*/
newctxt->parseFlags = ctxt->parseFlags;
xmlXIncludeDoProcess(newctxt, doc, xmlDocGetRootElement(doc));
for (i = 0;i < ctxt->incNr;i++) {
newctxt->incTab[i]->count--;
newctxt->incTab[i] = NULL;
}
/* urlTab may have been reallocated */
ctxt->urlTab = newctxt->urlTab;
ctxt->urlMax = newctxt->urlMax;
newctxt->urlMax = 0;
newctxt->urlNr = 0;
newctxt->urlTab = NULL;
xmlXIncludeFreeContext(newctxt);
}
#ifdef DEBUG_XINCLUDE
xmlGenericError(xmlGenericErrorContext, "Done recursing in doc %s\n", url);
#endif
}
/**
* xmlXIncludeAddTxt:
* @ctxt: the XInclude context
* @txt: the new text node
* @url: the associated URL
*
* Add a new txtument to the list
*/
static void
xmlXIncludeAddTxt(xmlXIncludeCtxtPtr ctxt, xmlNodePtr txt, const xmlURL url) {
#ifdef DEBUG_XINCLUDE
xmlGenericError(xmlGenericErrorContext, "Adding text %s\n", url);
#endif
if (ctxt->txtMax == 0) {
ctxt->txtMax = 4;
ctxt->txtTab = (xmlNodePtr *) xmlMalloc(ctxt->txtMax *
sizeof(ctxt->txtTab[0]));
if (ctxt->txtTab == NULL) {
xmlXIncludeErrMemory(ctxt, NULL, "processing text");
return;
}
ctxt->txturlTab = (xmlURL *) xmlMalloc(ctxt->txtMax *
sizeof(ctxt->txturlTab[0]));
if (ctxt->txturlTab == NULL) {
xmlXIncludeErrMemory(ctxt, NULL, "processing text");
return;
}
}
if (ctxt->txtNr >= ctxt->txtMax) {
ctxt->txtMax *= 2;
ctxt->txtTab = (xmlNodePtr *) xmlRealloc(ctxt->txtTab,
ctxt->txtMax * sizeof(ctxt->txtTab[0]));
if (ctxt->txtTab == NULL) {
xmlXIncludeErrMemory(ctxt, NULL, "processing text");
return;
}
ctxt->txturlTab = (xmlURL *) xmlRealloc(ctxt->txturlTab,
ctxt->txtMax * sizeof(ctxt->txturlTab[0]));
if (ctxt->txturlTab == NULL) {
xmlXIncludeErrMemory(ctxt, NULL, "processing text");
return;
}
}
ctxt->txtTab[ctxt->txtNr] = txt;
ctxt->txturlTab[ctxt->txtNr] = xmlStrdup(url);
ctxt->txtNr++;
}
/************************************************************************
* *
* Node copy with specific semantic *
* *
************************************************************************/
static xmlNodePtr
xmlXIncludeCopyNodeList(xmlXIncludeCtxtPtr ctxt, xmlDocPtr target,
xmlDocPtr source, xmlNodePtr elem);
/**
* xmlXIncludeCopyNode:
* @ctxt: the XInclude context
* @target: the document target
* @source: the document source
* @elem: the element
*
* Make a copy of the node while preserving the XInclude semantic
* of the Infoset copy
*/
static xmlNodePtr
xmlXIncludeCopyNode(xmlXIncludeCtxtPtr ctxt, xmlDocPtr target,
xmlDocPtr source, xmlNodePtr elem) {
xmlNodePtr result = NULL;
if ((ctxt == NULL) || (target == NULL) || (source == NULL) ||
(elem == NULL))
return(NULL);
if (elem->type == XML_DTD_NODE)
return(NULL);
if (elem->type == XML_DOCUMENT_NODE)
result = xmlXIncludeCopyNodeList(ctxt, target, source, elem->children);
else
result = xmlDocCopyNode(elem, target, 1);
return(result);
}
/**
* xmlXIncludeCopyNodeList:
* @ctxt: the XInclude context
* @target: the document target
* @source: the document source
* @elem: the element list
*
* Make a copy of the node list while preserving the XInclude semantic
* of the Infoset copy
*/
static xmlNodePtr
xmlXIncludeCopyNodeList(xmlXIncludeCtxtPtr ctxt, xmlDocPtr target,
xmlDocPtr source, xmlNodePtr elem) {
xmlNodePtr cur, res, result = NULL, last = NULL;
if ((ctxt == NULL) || (target == NULL) || (source == NULL) ||
(elem == NULL))
return(NULL);
cur = elem;
while (cur != NULL) {
res = xmlXIncludeCopyNode(ctxt, target, source, cur);
if (res != NULL) {
if (result == NULL) {
result = last = res;
} else {
last->next = res;
res->prev = last;
last = res;
}
}
cur = cur->next;
}
return(result);
}
/**
* xmlXIncludeGetNthChild:
* @cur: the node
* @no: the child number
*
* Returns the @n'th element child of @cur or NULL
*/
static xmlNodePtr
xmlXIncludeGetNthChild(xmlNodePtr cur, int no) {
int i;
if ((cur == NULL) || (cur->type == XML_NAMESPACE_DECL))
return(NULL);
cur = cur->children;
for (i = 0;i <= no;cur = cur->next) {
if (cur == NULL)
return(cur);
if ((cur->type == XML_ELEMENT_NODE) ||
(cur->type == XML_DOCUMENT_NODE) ||
(cur->type == XML_HTML_DOCUMENT_NODE)) {
i++;
if (i == no)
break;
}
}
return(cur);
}
xmlNodePtr xmlXPtrAdvanceNode(xmlNodePtr cur, int *level); /* in xpointer.c */
/**
* xmlXIncludeCopyRange:
* @ctxt: the XInclude context
* @target: the document target
* @source: the document source
* @obj: the XPointer result from the evaluation.
*
* Build a node list tree copy of the XPointer result.
*
* Returns an xmlNodePtr list or NULL.
* The caller has to free the node tree.
*/
static xmlNodePtr
xmlXIncludeCopyRange(xmlXIncludeCtxtPtr ctxt, xmlDocPtr target,
xmlDocPtr source, xmlXPathObjectPtr range) {
/* pointers to generated nodes */
xmlNodePtr list = NULL, last = NULL, listParent = NULL;
xmlNodePtr tmp, tmp2;
/* pointers to traversal nodes */
xmlNodePtr start, cur, end;
int index1, index2;
int level = 0, lastLevel = 0, endLevel = 0, endFlag = 0;
if ((ctxt == NULL) || (target == NULL) || (source == NULL) ||
(range == NULL))
return(NULL);
if (range->type != XPATH_RANGE)
return(NULL);
start = (xmlNodePtr) range->user;
if ((start == NULL) || (start->type == XML_NAMESPACE_DECL))
return(NULL);
end = range->user2;
if (end == NULL)
return(xmlDocCopyNode(start, target, 1));
if (end->type == XML_NAMESPACE_DECL)
return(NULL);
cur = start;
index1 = range->index;
index2 = range->index2;
/*
* level is depth of the current node under consideration
* list is the pointer to the root of the output tree
* listParent is a pointer to the parent of output tree (within
the included file) in case we need to add another level
* last is a pointer to the last node added to the output tree
* lastLevel is the depth of last (relative to the root)
*/
while (cur != NULL) {
/*
* Check if our output tree needs a parent
*/
if (level < 0) {
while (level < 0) {
/* copy must include namespaces and properties */
tmp2 = xmlDocCopyNode(listParent, target, 2);
xmlAddChild(tmp2, list);
list = tmp2;
listParent = listParent->parent;
level++;
}
last = list;
lastLevel = 0;
}
/*
* Check whether we need to change our insertion point
*/
while (level < lastLevel) {
last = last->parent;
lastLevel --;
}
if (cur == end) { /* Are we at the end of the range? */
if (cur->type == XML_TEXT_NODE) {
const xmlChar *content = cur->content;
int len;
if (content == NULL) {
tmp = xmlNewTextLen(NULL, 0);
} else {
len = index2;
if ((cur == start) && (index1 > 1)) {
content += (index1 - 1);
len -= (index1 - 1);
} else {
len = index2;
}
tmp = xmlNewTextLen(content, len);
}
/* single sub text node selection */
if (list == NULL)
return(tmp);
/* prune and return full set */
if (level == lastLevel)
xmlAddNextSibling(last, tmp);
else
xmlAddChild(last, tmp);
return(list);
} else { /* ending node not a text node */
endLevel = level; /* remember the level of the end node */
endFlag = 1;
/* last node - need to take care of properties + namespaces */
tmp = xmlDocCopyNode(cur, target, 2);
if (list == NULL) {