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xinclude.c
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xinclude.c
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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.
*
* daniel@veillard.com
*/
#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>
#ifdef LIBXML_XINCLUDE_ENABLED
#include <libxml/xinclude.h>
#include "private/buf.h"
#include "private/error.h"
#include "private/tree.h"
#include "private/xinclude.h"
#define XINCLUDE_MAX_DEPTH 40
/************************************************************************
* *
* 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 */
xmlChar *base; /* base URI of xi:include element */
xmlNodePtr elem; /* the xi:include element */
xmlNodePtr inc; /* the included copy */
int xml; /* xml or txt */
int fallback; /* fallback was loaded */
int expanding; /* flag to detect inclusion loops */
int replace; /* should the node be replaced? */
};
typedef struct _xmlXIncludeDoc xmlXIncludeDoc;
typedef xmlXIncludeDoc *xmlXIncludeDocPtr;
struct _xmlXIncludeDoc {
xmlDocPtr doc; /* the parsed document */
xmlChar *url; /* the URL */
int expanding; /* flag to detect inclusion loops */
};
typedef struct _xmlXIncludeTxt xmlXIncludeTxt;
typedef xmlXIncludeTxt *xmlXIncludeTxtPtr;
struct _xmlXIncludeTxt {
xmlChar *text; /* text string */
xmlChar *url; /* the URL */
};
struct _xmlXIncludeCtxt {
xmlDocPtr doc; /* the source 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 */
xmlXIncludeTxt *txtTab; /* array of unparsed documents */
int urlNr; /* number of documents stacked */
int urlMax; /* size of document stack */
xmlXIncludeDoc *urlTab; /* document stack */
int nbErrors; /* the number of errors detected */
int fatalErr; /* abort processing */
int errNo; /* error code */
int legacy; /* using XINCLUDE_OLD_NS */
int parseFlags; /* the flags used for parsing XML documents */
void *_private; /* application data */
#ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
unsigned long incTotal; /* total number of processed inclusions */
#endif
int depth; /* recursion depth */
int isStream; /* streaming mode */
xmlXPathContextPtr xpctxt;
xmlStructuredErrorFunc errorHandler;
void *errorCtxt;
};
static xmlXIncludeRefPtr
xmlXIncludeExpandNode(xmlXIncludeCtxtPtr ctxt, xmlNodePtr node);
static int
xmlXIncludeLoadNode(xmlXIncludeCtxtPtr ctxt, xmlXIncludeRefPtr ref);
static int
xmlXIncludeDoProcess(xmlXIncludeCtxtPtr ctxt, xmlNodePtr tree);
/************************************************************************
* *
* XInclude error handler *
* *
************************************************************************/
/**
* xmlXIncludeErrMemory:
* @extra: extra information
*
* Handle an out of memory condition
*/
static void
xmlXIncludeErrMemory(xmlXIncludeCtxtPtr ctxt)
{
ctxt->errNo = XML_ERR_NO_MEMORY;
ctxt->fatalErr = 1;
ctxt->nbErrors++;
xmlRaiseMemoryError(ctxt->errorHandler, NULL, ctxt->errorCtxt,
XML_FROM_XINCLUDE, NULL);
}
/**
* 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)
{
xmlStructuredErrorFunc schannel = NULL;
xmlGenericErrorFunc channel = NULL;
void *data = NULL;
int res;
if (ctxt->fatalErr != 0)
return;
ctxt->nbErrors++;
schannel = ctxt->errorHandler;
data = ctxt->errorCtxt;
if (schannel == NULL) {
channel = xmlGenericError;
data = xmlGenericErrorContext;
}
res = __xmlRaiseError(schannel, channel, data, ctxt, node,
XML_FROM_XINCLUDE, error, XML_ERR_ERROR,
NULL, 0, (const char *) extra, NULL, NULL, 0, 0,
msg, (const char *) extra);
if (res < 0) {
ctxt->errNo = XML_ERR_NO_MEMORY;
ctxt->fatalErr = 1;
} else {
ctxt->errNo = error;
}
}
/**
* 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;
if (xmlNodeGetAttrValue(cur, name, XINCLUDE_NS, &ret) < 0)
xmlXIncludeErrMemory(ctxt);
if (ret != NULL)
return(ret);
if (ctxt->legacy != 0) {
if (xmlNodeGetAttrValue(cur, name, XINCLUDE_OLD_NS, &ret) < 0)
xmlXIncludeErrMemory(ctxt);
if (ret != NULL)
return(ret);
}
if (xmlNodeGetAttrValue(cur, name, NULL, &ret) < 0)
xmlXIncludeErrMemory(ctxt);
return(ret);
}
/**
* xmlXIncludeFreeRef:
* @ref: the XInclude reference
*
* Free an XInclude reference
*/
static void
xmlXIncludeFreeRef(xmlXIncludeRefPtr ref) {
if (ref == NULL)
return;
if (ref->URI != NULL)
xmlFree(ref->URI);
if (ref->fragment != NULL)
xmlFree(ref->fragment);
if (ref->base != NULL)
xmlFree(ref->base);
xmlFree(ref);
}
/**
* xmlXIncludeNewContext:
* @doc: an XML Document
*
* Creates a new XInclude context
*
* Returns the new set
*/
xmlXIncludeCtxtPtr
xmlXIncludeNewContext(xmlDocPtr doc) {
xmlXIncludeCtxtPtr ret;
if (doc == NULL)
return(NULL);
ret = (xmlXIncludeCtxtPtr) xmlMalloc(sizeof(xmlXIncludeCtxt));
if (ret == NULL)
return(NULL);
memset(ret, 0, sizeof(xmlXIncludeCtxt));
ret->doc = doc;
ret->incNr = 0;
ret->incMax = 0;
ret->incTab = NULL;
ret->nbErrors = 0;
return(ret);
}
/**
* xmlXIncludeFreeContext:
* @ctxt: the XInclude context
*
* Free an XInclude context
*/
void
xmlXIncludeFreeContext(xmlXIncludeCtxtPtr ctxt) {
int i;
if (ctxt == NULL)
return;
if (ctxt->urlTab != NULL) {
for (i = 0; i < ctxt->urlNr; i++) {
xmlFreeDoc(ctxt->urlTab[i].doc);
xmlFree(ctxt->urlTab[i].url);
}
xmlFree(ctxt->urlTab);
}
for (i = 0;i < ctxt->incNr;i++) {
if (ctxt->incTab[i] != NULL)
xmlXIncludeFreeRef(ctxt->incTab[i]);
}
if (ctxt->incTab != NULL)
xmlFree(ctxt->incTab);
if (ctxt->txtTab != NULL) {
for (i = 0;i < ctxt->txtNr;i++) {
xmlFree(ctxt->txtTab[i].text);
xmlFree(ctxt->txtTab[i].url);
}
xmlFree(ctxt->txtTab);
}
if (ctxt->xpctxt != NULL)
xmlXPathFreeContext(ctxt->xpctxt);
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 = NULL;
xmlParserCtxtPtr pctxt;
xmlParserInputPtr inputStream;
xmlInitParser();
pctxt = xmlNewParserCtxt();
if (pctxt == NULL) {
xmlXIncludeErrMemory(ctxt);
return(NULL);
}
if (ctxt->errorHandler != NULL)
xmlCtxtSetErrorHandler(pctxt, ctxt->errorHandler, ctxt->errorCtxt);
/*
* 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);
inputStream = xmlLoadExternalEntity(URL, NULL, pctxt);
if (inputStream == NULL)
goto error;
inputPush(pctxt, inputStream);
xmlParseDocument(pctxt);
if (pctxt->wellFormed) {
ret = pctxt->myDoc;
}
else {
ret = NULL;
if (pctxt->myDoc != NULL)
xmlFreeDoc(pctxt->myDoc);
pctxt->myDoc = NULL;
}
error:
if (pctxt->errNo == XML_ERR_NO_MEMORY)
xmlXIncludeErrMemory(ctxt);
xmlFreeParserCtxt(pctxt);
return(ret);
}
/**
* xmlXIncludeAddNode:
* @ctxt: the XInclude context
* @cur: the new node
*
* Add a new node to process to an XInclude context
*/
static xmlXIncludeRefPtr
xmlXIncludeAddNode(xmlXIncludeCtxtPtr ctxt, xmlNodePtr cur) {
xmlXIncludeRefPtr ref = NULL;
xmlXIncludeRefPtr ret = NULL;
xmlURIPtr uri = NULL;
xmlChar *href = NULL;
xmlChar *parse = NULL;
xmlChar *fragment = NULL;
xmlChar *base = NULL;
xmlChar *tmp;
int xml = 1;
int local = 0;
int res;
if (ctxt == NULL)
return(NULL);
if (cur == NULL)
return(NULL);
/*
* read the attributes
*/
fragment = xmlXIncludeGetProp(ctxt, cur, XINCLUDE_PARSE_XPOINTER);
href = xmlXIncludeGetProp(ctxt, cur, XINCLUDE_HREF);
if (href == NULL) {
if (fragment == NULL) {
xmlXIncludeErr(ctxt, cur, XML_XINCLUDE_NO_HREF,
"href or xpointer must be present\n", parse);
goto error;
}
href = xmlStrdup(BAD_CAST ""); /* @@@@ href is now optional */
if (href == NULL) {
xmlXIncludeErrMemory(ctxt);
goto error;
}
}
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);
goto error;
}
}
/*
* Check the URL and remove any fragment identifier
*/
res = xmlParseURISafe((const char *)href, &uri);
if (uri == NULL) {
if (res < 0)
xmlXIncludeErrMemory(ctxt);
else
xmlXIncludeErr(ctxt, cur, XML_XINCLUDE_HREF_URI,
"invalid value href %s\n", href);
goto error;
}
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",
href);
goto error;
}
uri->fragment = NULL;
}
tmp = xmlSaveUri(uri);
if (tmp == NULL) {
xmlXIncludeErrMemory(ctxt);
goto error;
}
xmlFree(href);
href = tmp;
/*
* Resolve URI
*/
if (xmlNodeGetBaseSafe(ctxt->doc, cur, &base) < 0) {
xmlXIncludeErrMemory(ctxt);
goto error;
}
if (href[0] != 0) {
if (xmlBuildURISafe(href, base, &tmp) < 0) {
xmlXIncludeErrMemory(ctxt);
goto error;
}
if (tmp == NULL) {
xmlXIncludeErr(ctxt, cur, XML_XINCLUDE_HREF_URI,
"failed build URL\n", NULL);
goto error;
}
xmlFree(href);
href = tmp;
if (xmlStrEqual(href, ctxt->doc->URL))
local = 1;
} else {
local = 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",
href);
goto error;
}
ref = (xmlXIncludeRefPtr) xmlMalloc(sizeof(xmlXIncludeRef));
if (ref == NULL) {
xmlXIncludeErrMemory(ctxt);
goto error;
}
memset(ref, 0, sizeof(xmlXIncludeRef));
ref->elem = cur;
ref->xml = xml;
ref->URI = href;
href = NULL;
ref->fragment = fragment;
fragment = NULL;
/*
* xml:base fixup
*/
if (((ctxt->parseFlags & XML_PARSE_NOBASEFIX) == 0) &&
(cur->doc != NULL) &&
((cur->doc->parseFlags & XML_PARSE_NOBASEFIX) == 0)) {
if (base != NULL) {
ref->base = base;
base = NULL;
} else {
ref->base = xmlStrdup(BAD_CAST "");
if (ref->base == NULL) {
xmlXIncludeErrMemory(ctxt);
goto error;
}
}
}
if (ctxt->incNr >= ctxt->incMax) {
xmlXIncludeRefPtr *table;
#ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
size_t newSize = ctxt->incMax ? ctxt->incMax * 2 : 1;
#else
size_t newSize = ctxt->incMax ? ctxt->incMax * 2 : 4;
#endif
table = (xmlXIncludeRefPtr *) xmlRealloc(ctxt->incTab,
newSize * sizeof(ctxt->incTab[0]));
if (table == NULL) {
xmlXIncludeErrMemory(ctxt);
goto error;
}
ctxt->incTab = table;
ctxt->incMax = newSize;
}
ctxt->incTab[ctxt->incNr++] = ref;
ret = ref;
ref = NULL;
error:
xmlXIncludeFreeRef(ref);
xmlFreeURI(uri);
xmlFree(href);
xmlFree(parse);
xmlFree(fragment);
xmlFree(base);
return(ret);
}
/**
* 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) {
xmlDocPtr oldDoc;
xmlXIncludeRefPtr *oldIncTab;
int oldIncMax, oldIncNr, oldIsStream;
int i;
oldDoc = ctxt->doc;
oldIncMax = ctxt->incMax;
oldIncNr = ctxt->incNr;
oldIncTab = ctxt->incTab;
oldIsStream = ctxt->isStream;
ctxt->doc = doc;
ctxt->incMax = 0;
ctxt->incNr = 0;
ctxt->incTab = NULL;
ctxt->isStream = 0;
xmlXIncludeDoProcess(ctxt, xmlDocGetRootElement(doc));
if (ctxt->incTab != NULL) {
for (i = 0; i < ctxt->incNr; i++)
xmlXIncludeFreeRef(ctxt->incTab[i]);
xmlFree(ctxt->incTab);
}
ctxt->doc = oldDoc;
ctxt->incMax = oldIncMax;
ctxt->incNr = oldIncNr;
ctxt->incTab = oldIncTab;
ctxt->isStream = oldIsStream;
}
/************************************************************************
* *
* Node copy with specific semantic *
* *
************************************************************************/
static void
xmlXIncludeBaseFixup(xmlXIncludeCtxtPtr ctxt, xmlNodePtr cur, xmlNodePtr copy,
const xmlChar *targetBase) {
xmlChar *base = NULL;
xmlChar *relBase = NULL;
xmlNs ns;
int res;
if (cur->type != XML_ELEMENT_NODE)
return;
if (xmlNodeGetBaseSafe(cur->doc, cur, &base) < 0)
xmlXIncludeErrMemory(ctxt);
if ((base != NULL) && !xmlStrEqual(base, targetBase)) {
if (xmlBuildRelativeURISafe(base, targetBase, &relBase) < 0) {
xmlXIncludeErrMemory(ctxt);
goto done;
}
if (relBase == NULL) {
xmlXIncludeErr(ctxt, cur,
XML_XINCLUDE_HREF_URI,
"Building relative URI failed: %s\n",
base);
goto done;
}
/*
* If the new base doesn't contain a slash, it can be omitted.
*/
if (xmlStrchr(relBase, '/') != NULL) {
res = xmlNodeSetBase(copy, relBase);
if (res < 0)
xmlXIncludeErrMemory(ctxt);
goto done;
}
}
/*
* Delete existing xml:base if bases are equal
*/
memset(&ns, 0, sizeof(ns));
ns.href = XML_XML_NAMESPACE;
xmlUnsetNsProp(copy, &ns, BAD_CAST "base");
done:
xmlFree(base);
xmlFree(relBase);
}
/**
* xmlXIncludeCopyNode:
* @ctxt: the XInclude context
* @elem: the element
* @copyChildren: copy children instead of node if true
*
* Make a copy of the node while expanding nested XIncludes.
*
* Returns a node list, not a single node.
*/
static xmlNodePtr
xmlXIncludeCopyNode(xmlXIncludeCtxtPtr ctxt, xmlNodePtr elem,
int copyChildren, const xmlChar *targetBase) {
xmlNodePtr result = NULL;
xmlNodePtr insertParent = NULL;
xmlNodePtr insertLast = NULL;
xmlNodePtr cur;
xmlNodePtr item;
int depth = 0;
if (copyChildren) {
cur = elem->children;
if (cur == NULL)
return(NULL);
} else {
cur = elem;
}
while (1) {
xmlNodePtr copy = NULL;
int recurse = 0;
if ((cur->type == XML_DOCUMENT_NODE) ||
(cur->type == XML_DTD_NODE)) {
;
} else if ((cur->type == XML_ELEMENT_NODE) &&
(cur->ns != NULL) &&
(xmlStrEqual(cur->name, XINCLUDE_NODE)) &&
((xmlStrEqual(cur->ns->href, XINCLUDE_NS)) ||
(xmlStrEqual(cur->ns->href, XINCLUDE_OLD_NS)))) {
xmlXIncludeRefPtr ref = xmlXIncludeExpandNode(ctxt, cur);
if (ref == NULL)
goto error;
/*
* TODO: Insert XML_XINCLUDE_START and XML_XINCLUDE_END nodes
*/
for (item = ref->inc; item != NULL; item = item->next) {
copy = xmlStaticCopyNode(item, ctxt->doc, insertParent, 1);
if (copy == NULL) {
xmlXIncludeErrMemory(ctxt);
goto error;
}
if (result == NULL)
result = copy;
if (insertLast != NULL) {
insertLast->next = copy;
copy->prev = insertLast;
} else if (insertParent != NULL) {
insertParent->children = copy;
}
insertLast = copy;
if ((depth == 0) && (targetBase != NULL))
xmlXIncludeBaseFixup(ctxt, item, copy, targetBase);
}
} else {
copy = xmlStaticCopyNode(cur, ctxt->doc, insertParent, 2);
if (copy == NULL) {
xmlXIncludeErrMemory(ctxt);
goto error;
}
if (result == NULL)
result = copy;
if (insertLast != NULL) {
insertLast->next = copy;
copy->prev = insertLast;
} else if (insertParent != NULL) {
insertParent->children = copy;
}
insertLast = copy;
if ((depth == 0) && (targetBase != NULL))
xmlXIncludeBaseFixup(ctxt, cur, copy, targetBase);
recurse = (cur->type != XML_ENTITY_REF_NODE) &&
(cur->children != NULL);
}
if (recurse) {
cur = cur->children;
insertParent = insertLast;
insertLast = NULL;
depth += 1;
continue;
}
if (cur == elem)
return(result);
while (cur->next == NULL) {
if (insertParent != NULL)
insertParent->last = insertLast;
cur = cur->parent;
if (cur == elem)
return(result);
insertLast = insertParent;
insertParent = insertParent->parent;
depth -= 1;
}
cur = cur->next;
}
error:
xmlFreeNodeList(result);
return(NULL);
}
#ifdef LIBXML_XPTR_LOCS_ENABLED
/**
* 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
* @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, 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) || (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, ctxt->doc, 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, ctxt->doc, 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 = xmlNewDocTextLen(ctxt->doc, NULL, 0);
} else {
len = index2;
if ((cur == start) && (index1 > 1)) {
content += (index1 - 1);
len -= (index1 - 1);
} else {
len = index2;
}
tmp = xmlNewDocTextLen(ctxt->doc, 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, ctxt->doc, 2);
if (list == NULL) {
list = tmp;
listParent = cur->parent;
last = tmp;
} else {
if (level == lastLevel)
last = xmlAddNextSibling(last, tmp);
else {
last = xmlAddChild(last, tmp);
lastLevel = level;
}
}
if (index2 > 1) {
end = xmlXIncludeGetNthChild(cur, index2 - 1);
index2 = 0;
}
if ((cur == start) && (index1 > 1)) {
cur = xmlXIncludeGetNthChild(cur, index1 - 1);
index1 = 0;
} else {
cur = cur->children;
}
level++; /* increment level to show change */
/*
* Now gather the remaining nodes from cur to end
*/
continue; /* while */
}
} else if (cur == start) { /* Not at the end, are we at start? */
if ((cur->type == XML_TEXT_NODE) ||
(cur->type == XML_CDATA_SECTION_NODE)) {
const xmlChar *content = cur->content;
if (content == NULL) {
tmp = xmlNewDocTextLen(ctxt->doc, NULL, 0);
} else {
if (index1 > 1) {
content += (index1 - 1);
index1 = 0;
}
tmp = xmlNewDocText(ctxt->doc, content);
}
last = list = tmp;
listParent = cur->parent;
} else { /* Not text node */
/*
* start of the range - need to take care of
* properties and namespaces
*/
tmp = xmlDocCopyNode(cur, ctxt->doc, 2);
list = last = tmp;
listParent = cur->parent;
if (index1 > 1) { /* Do we need to position? */
cur = xmlXIncludeGetNthChild(cur, index1 - 1);
level = lastLevel = 1;
index1 = 0;
/*
* Now gather the remaining nodes from cur to end
*/
continue; /* while */
}
}
} else {
tmp = NULL;
switch (cur->type) {
case XML_DTD_NODE:
case XML_ELEMENT_DECL:
case XML_ATTRIBUTE_DECL:
case XML_ENTITY_NODE:
/* Do not copy DTD information */
break;
case XML_ENTITY_DECL:
/* handle crossing entities -> stack needed */
break;
case XML_XINCLUDE_START:
case XML_XINCLUDE_END:
/* don't consider it part of the tree content */
break;
case XML_ATTRIBUTE_NODE:
/* Humm, should not happen ! */
break;
default:
/*
* Middle of the range - need to take care of
* properties and namespaces
*/
tmp = xmlDocCopyNode(cur, ctxt->doc, 2);
break;
}
if (tmp != NULL) {