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darling-libxml2/xinclude.c
William M. Brack 7b0e276395 a little further fixing of fallback processing, this time for fallback 
* xinclude.c: a little further fixing of fallback processing, this
  time for fallback with children (bug 139520).
2004-05-12 09:33:23 +00:00

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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/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>
#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 */
};
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
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
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 = 0;
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] = 0;
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]);
}
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);
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;
char *directory = NULL;
xmlParserInputPtr inputStream;
xmlInitParser();
pctxt = xmlNewParserCtxt();
if (pctxt == NULL) {
xmlXIncludeErrMemory(ctxt, NULL, "cannot allocate parser context");
return(NULL);
}
/*
* 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) &&
(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) && (directory == NULL))
directory = xmlParserGetDirectory(URL);
if ((pctxt->directory == NULL) && (directory != NULL))
pctxt->directory = (char *) xmlStrdup((xmlChar *) directory);
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);
local = 1;
}
if (href[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);
}
/*
* Check the URL against the stack for recursions
*/
if (!local) {
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 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 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 *
* *
************************************************************************/
/**
* 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);
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)
return(cur);
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)
return(NULL);
end = range->user2;
if (end == NULL)
return(xmlDocCopyNode(start, target, 1));
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);
index1 = 0;
} 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) {
list = tmp;
listParent = cur->parent;
} else {
if (level == lastLevel)
xmlAddNextSibling(last, tmp);
else {
xmlAddChild(last, tmp);
lastLevel = level;
}
}
last = tmp;
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 = xmlNewTextLen(NULL, 0);
} else {
if (index1 > 1) {
content += (index1 - 1);
index1 = 0;
}
tmp = xmlNewText(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, target, 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 informations */
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, target, 2);
break;
}
if (tmp != NULL) {
if (level == lastLevel)
xmlAddNextSibling(last, tmp);
else {
xmlAddChild(last, tmp);
lastLevel = level;
}
last = tmp;
}
}
/*
* Skip to next node in document order
*/
cur = xmlXPtrAdvanceNode(cur, &level);
if (endFlag && (level >= endLevel))
break;
}
return(list);
}
/**
* xmlXIncludeBuildNodeList:
* @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.
* This will drop Attributes and Namespace declarations.
*
* Returns an xmlNodePtr list or NULL.
* the caller has to free the node tree.
*/
static xmlNodePtr
xmlXIncludeCopyXPointer(xmlXIncludeCtxtPtr ctxt, xmlDocPtr target,
xmlDocPtr source, xmlXPathObjectPtr obj) {
xmlNodePtr list = NULL, last = NULL;
int i;
if (source == NULL)
source = ctxt->doc;
if ((ctxt == NULL) || (target == NULL) || (source == NULL) ||
(obj == NULL))
return(NULL);
switch (obj->type) {
case XPATH_NODESET: {
xmlNodeSetPtr set = obj->nodesetval;
if (set == NULL)
return(NULL);
for (i = 0;i < set->nodeNr;i++) {
if (set->nodeTab[i] == NULL)
continue;
switch (set->nodeTab[i]->type) {
case XML_TEXT_NODE:
case XML_CDATA_SECTION_NODE:
case XML_ELEMENT_NODE:
case XML_ENTITY_REF_NODE:
case XML_ENTITY_NODE:
case XML_PI_NODE:
case XML_COMMENT_NODE:
case XML_DOCUMENT_NODE:
case XML_HTML_DOCUMENT_NODE:
#ifdef LIBXML_DOCB_ENABLED
case XML_DOCB_DOCUMENT_NODE:
#endif
case XML_XINCLUDE_END:
break;
case XML_XINCLUDE_START: {
xmlNodePtr tmp, cur = set->nodeTab[i];
cur = cur->next;
while (cur != NULL) {
switch(cur->type) {
case XML_TEXT_NODE:
case XML_CDATA_SECTION_NODE:
case XML_ELEMENT_NODE:
case XML_ENTITY_REF_NODE:
case XML_ENTITY_NODE:
case XML_PI_NODE:
case XML_COMMENT_NODE:
tmp = xmlXIncludeCopyNode(ctxt, target,
source, cur);
if (last == NULL) {
list = last = tmp;
} else {
xmlAddNextSibling(last, tmp);
last = tmp;
}
cur = cur->next;
continue;
default:
break;
}
break;
}
continue;
}
case XML_ATTRIBUTE_NODE:
case XML_NAMESPACE_DECL:
case XML_DOCUMENT_TYPE_NODE:
case XML_DOCUMENT_FRAG_NODE:
case XML_NOTATION_NODE:
case XML_DTD_NODE:
case XML_ELEMENT_DECL:
case XML_ATTRIBUTE_DECL:
case XML_ENTITY_DECL:
continue; /* for */
}
if (last == NULL)
list = last = xmlXIncludeCopyNode(ctxt, target, source,
set->nodeTab[i]);
else {
xmlAddNextSibling(last,
xmlXIncludeCopyNode(ctxt, target, source,
set->nodeTab[i]));
if (last->next != NULL)
last = last->next;
}
}
break;
}
case XPATH_LOCATIONSET: {
xmlLocationSetPtr set = (xmlLocationSetPtr) obj->user;
if (set == NULL)
return(NULL);
for (i = 0;i < set->locNr;i++) {
if (last == NULL)
list = last = xmlXIncludeCopyXPointer(ctxt, target, source,
set->locTab[i]);
else
xmlAddNextSibling(last,
xmlXIncludeCopyXPointer(ctxt, target, source,
set->locTab[i]));
if (last != NULL) {
while (last->next != NULL)
last = last->next;
}
}
break;
}
#ifdef LIBXML_XPTR_ENABLED
case XPATH_RANGE:
return(xmlXIncludeCopyRange(ctxt, target, source, obj));
#endif
case XPATH_POINT:
/* points are ignored in XInclude */
break;
default:
break;
}
return(list);
}
/************************************************************************
* *
* XInclude I/O handling *
* *
************************************************************************/
typedef struct _xmlXIncludeMergeData xmlXIncludeMergeData;
typedef xmlXIncludeMergeData *xmlXIncludeMergeDataPtr;
struct _xmlXIncludeMergeData {
xmlDocPtr doc;
xmlXIncludeCtxtPtr ctxt;
};
/**
* xmlXIncludeMergeOneEntity:
* @ent: the entity
* @doc: the including doc
* @nr: the entity name
*
* Inplements the merge of one entity
*/
static void
xmlXIncludeMergeEntity(xmlEntityPtr ent, xmlXIncludeMergeDataPtr data,
xmlChar *name ATTRIBUTE_UNUSED) {
xmlEntityPtr ret, prev;
xmlDocPtr doc;
xmlXIncludeCtxtPtr ctxt;
if ((ent == NULL) || (data == NULL))
return;
ctxt = data->ctxt;
doc = data->doc;
if ((ctxt == NULL) || (doc == NULL))
return;
switch (ent->etype) {
case XML_INTERNAL_PARAMETER_ENTITY:
case XML_EXTERNAL_PARAMETER_ENTITY:
case XML_INTERNAL_PREDEFINED_ENTITY:
return;
case XML_INTERNAL_GENERAL_ENTITY:
case XML_EXTERNAL_GENERAL_PARSED_ENTITY:
case XML_EXTERNAL_GENERAL_UNPARSED_ENTITY:
break;
}
ret = xmlAddDocEntity(doc, ent->name, ent->etype, ent->ExternalID,
ent->SystemID, ent->content);
if (ret != NULL) {
if (ent->URI != NULL)
ret->URI = xmlStrdup(ent->URI);
} else {
prev = xmlGetDocEntity(doc, ent->name);
if (prev != NULL) {
if (ent->etype != prev->etype)
goto error;
if ((ent->SystemID != NULL) && (prev->SystemID != NULL)) {
if (!xmlStrEqual(ent->SystemID, prev->SystemID))
goto error;
} else if ((ent->ExternalID != NULL) &&
(prev->ExternalID != NULL)) {
if (!xmlStrEqual(ent->ExternalID, prev->ExternalID))
goto error;
} else if ((ent->content != NULL) && (prev->content != NULL)) {
if (!xmlStrEqual(ent->content, prev->content))
goto error;
} else {
goto error;
}
}
}
return;
error:
switch (ent->etype) {
case XML_INTERNAL_PARAMETER_ENTITY:
case XML_EXTERNAL_PARAMETER_ENTITY:
case XML_INTERNAL_PREDEFINED_ENTITY:
case XML_INTERNAL_GENERAL_ENTITY:
case XML_EXTERNAL_GENERAL_PARSED_ENTITY:
return;
case XML_EXTERNAL_GENERAL_UNPARSED_ENTITY:
break;
}
xmlXIncludeErr(ctxt, (xmlNodePtr) ent, XML_XINCLUDE_ENTITY_DEF_MISMATCH,
"mismatch in redefinition of entity %s\n",
ent->name);
}
/**
* xmlXIncludeMergeEntities:
* @ctxt: an XInclude context
* @doc: the including doc
* @from: the included doc
*
* Inplements the entity merge
*
* Returns 0 if merge succeeded, -1 if some processing failed
*/
static int
xmlXIncludeMergeEntities(xmlXIncludeCtxtPtr ctxt, xmlDocPtr doc,
xmlDocPtr from) {
xmlNodePtr cur;
xmlDtdPtr target, source;
if (ctxt == NULL)
return(-1);
if ((from == NULL) || (from->intSubset == NULL))
return(0);
target = doc->intSubset;
if (target == NULL) {
cur = xmlDocGetRootElement(doc);
if (cur == NULL)
return(-1);
target = xmlCreateIntSubset(doc, cur->name, NULL, NULL);
if (target == NULL)
return(-1);
}
source = from->intSubset;
if ((source != NULL) && (source->entities != NULL)) {
xmlXIncludeMergeData data;
data.ctxt = ctxt;
data.doc = doc;
xmlHashScan((xmlHashTablePtr) source->entities,
(xmlHashScanner) xmlXIncludeMergeEntity, &data);
}
source = from->extSubset;
if ((source != NULL) && (source->entities != NULL)) {
xmlXIncludeMergeData data;
data.ctxt = ctxt;
data.doc = doc;
/*
* don't duplicate existing stuff when external subsets are the same
*/
if ((!xmlStrEqual(target->ExternalID, source->ExternalID)) &&
(!xmlStrEqual(target->SystemID, source->SystemID))) {
xmlHashScan((xmlHashTablePtr) source->entities,
(xmlHashScanner) xmlXIncludeMergeEntity, &data);
}
}
return(0);
}
/**
* xmlXIncludeLoadDoc:
* @ctxt: the XInclude context
* @url: the associated URL
* @nr: the xinclude node number
*
* Load the document, and store the result in the XInclude context
*
* Returns 0 in case of success, -1 in case of failure
*/
static int
xmlXIncludeLoadDoc(xmlXIncludeCtxtPtr ctxt, const xmlChar *url, int nr) {
xmlDocPtr doc;
xmlURIPtr uri;
xmlChar *URL;
xmlChar *fragment = NULL;
int i = 0;
#ifdef LIBXML_XPTR_ENABLED
int saveFlags;
#endif
#ifdef DEBUG_XINCLUDE
xmlGenericError(xmlGenericErrorContext, "Loading doc %s:%d\n", url, nr);
#endif
/*
* Check the URL and remove any fragment identifier
*/
uri = xmlParseURI((const char *)url);
if (uri == NULL) {
xmlXIncludeErr(ctxt, ctxt->incTab[nr]->ref,
XML_XINCLUDE_HREF_URI,
"invalid value URI %s\n", url);
return(-1);
}
if (uri->fragment != NULL) {
fragment = (xmlChar *) uri->fragment;
uri->fragment = NULL;
}
if ((ctxt->incTab != NULL) && (ctxt->incTab[nr] != NULL) &&
(ctxt->incTab[nr]->fragment != NULL)) {
if (fragment != NULL) xmlFree(fragment);
fragment = xmlStrdup(ctxt->incTab[nr]->fragment);
}
URL = xmlSaveUri(uri);
xmlFreeURI(uri);
if (URL == NULL) {
xmlXIncludeErr(ctxt, ctxt->incTab[nr]->ref,
XML_XINCLUDE_HREF_URI,
"invalid value URI %s\n", url);
if (fragment != NULL)
xmlFree(fragment);
return(-1);
}
/*
* Handling of references to the local document are done
* directly through ctxt->doc.
*/
if ((URL[0] == 0) || (URL[0] == '#') ||
((ctxt->doc != NULL) && (xmlStrEqual(URL, ctxt->doc->URL)))) {
doc = NULL;
goto loaded;
}
/*
* Prevent reloading twice the document.
*/
for (i = 0; i < ctxt->incNr; i++) {
if ((xmlStrEqual(URL, ctxt->incTab[i]->URI)) &&
(ctxt->incTab[i]->doc != NULL)) {
doc = ctxt->incTab[i]->doc;
#ifdef DEBUG_XINCLUDE
printf("Already loaded %s\n", URL);
#endif
goto loaded;
}
}
/*
* Load it.
*/
#ifdef DEBUG_XINCLUDE
printf("loading %s\n", URL);
#endif
#ifdef LIBXML_XPTR_ENABLED
/*
* If this is an XPointer evaluation, we want to assure that
* all entities have been resolved prior to processing the
* referenced document
*/
saveFlags = ctxt->parseFlags;
if (fragment != NULL) { /* if this is an XPointer eval */
ctxt->parseFlags |= XML_PARSE_NOENT;
}
#endif
doc = xmlXIncludeParseFile(ctxt, (const char *)URL);
#ifdef LIBXML_XPTR_ENABLED
ctxt->parseFlags = saveFlags;
#endif
if (doc == NULL) {
xmlFree(URL);
if (fragment != NULL)
xmlFree(fragment);
return(-1);
}
ctxt->incTab[nr]->doc = doc;
for (i = nr + 1; i < ctxt->incNr; i++) {
if (xmlStrEqual(URL, ctxt->incTab[i]->URI)) {
ctxt->incTab[nr]->count++;
#ifdef DEBUG_XINCLUDE
printf("Increasing %s count since reused\n", URL);
#endif
break;
}
}
/*
* Make sure we have all entities fixed up
*/
xmlXIncludeMergeEntities(ctxt, ctxt->doc, doc);
/*
* We don't need the DTD anymore, free up space
if (doc->intSubset != NULL) {
xmlUnlinkNode((xmlNodePtr) doc->intSubset);
xmlFreeNode((xmlNodePtr) doc->intSubset);
doc->intSubset = NULL;
}
if (doc->extSubset != NULL) {
xmlUnlinkNode((xmlNodePtr) doc->extSubset);
xmlFreeNode((xmlNodePtr) doc->extSubset);
doc->extSubset = NULL;
}
*/
xmlXIncludeRecurseDoc(ctxt, doc, URL);
loaded:
if (fragment == NULL) {
/*
* Add the top children list as the replacement copy.
*/
if (doc == NULL)
{
/* Hopefully a DTD declaration won't be copied from
* the same document */
ctxt->incTab[nr]->inc = xmlCopyNodeList(ctxt->doc->children);
} else {
ctxt->incTab[nr]->inc = xmlXIncludeCopyNodeList(ctxt, ctxt->doc,
doc, doc->children);
}
}
#ifdef LIBXML_XPTR_ENABLED
else {
/*
* Computes the XPointer expression and make a copy used
* as the replacement copy.
*/
xmlXPathObjectPtr xptr;
xmlXPathContextPtr xptrctxt;
xmlNodeSetPtr set;
if (doc == NULL) {
xptrctxt = xmlXPtrNewContext(ctxt->doc, ctxt->incTab[nr]->ref,
NULL);
} else {
xptrctxt = xmlXPtrNewContext(doc, NULL, NULL);
}
if (xptrctxt == NULL) {
xmlXIncludeErr(ctxt, ctxt->incTab[nr]->ref,
XML_XINCLUDE_XPTR_FAILED,
"could not create XPointer context\n", NULL);
xmlFree(URL);
xmlFree(fragment);
return(-1);
}
xptr = xmlXPtrEval(fragment, xptrctxt);
if (xptr == NULL) {
xmlXIncludeErr(ctxt, ctxt->incTab[nr]->ref,
XML_XINCLUDE_XPTR_FAILED,
"XPointer evaluation failed: #%s\n",
fragment);
xmlXPathFreeContext(xptrctxt);
xmlFree(URL);
xmlFree(fragment);
return(-1);
}
switch (xptr->type) {
case XPATH_UNDEFINED:
case XPATH_BOOLEAN:
case XPATH_NUMBER:
case XPATH_STRING:
case XPATH_POINT:
case XPATH_USERS:
case XPATH_XSLT_TREE:
xmlXIncludeErr(ctxt, ctxt->incTab[nr]->ref,
XML_XINCLUDE_XPTR_RESULT,
"XPointer is not a range: #%s\n",
fragment);
xmlXPathFreeContext(xptrctxt);
xmlFree(URL);
xmlFree(fragment);
return(-1);
case XPATH_NODESET:
if ((xptr->nodesetval == NULL) ||
(xptr->nodesetval->nodeNr <= 0)) {
xmlXPathFreeContext(xptrctxt);
xmlFree(URL);
xmlFree(fragment);
return(-1);
}
case XPATH_RANGE:
case XPATH_LOCATIONSET:
break;
}
set = xptr->nodesetval;
if (set != NULL) {
for (i = 0;i < set->nodeNr;i++) {
if (set->nodeTab[i] == NULL)
continue;
switch (set->nodeTab[i]->type) {
case XML_TEXT_NODE:
case XML_CDATA_SECTION_NODE:
case XML_ELEMENT_NODE:
case XML_ENTITY_REF_NODE:
case XML_ENTITY_NODE:
case XML_PI_NODE:
case XML_COMMENT_NODE:
case XML_DOCUMENT_NODE:
case XML_HTML_DOCUMENT_NODE:
#ifdef LIBXML_DOCB_ENABLED
case XML_DOCB_DOCUMENT_NODE:
#endif
continue;
case XML_ATTRIBUTE_NODE:
xmlXIncludeErr(ctxt, ctxt->incTab[nr]->ref,
XML_XINCLUDE_XPTR_RESULT,
"XPointer selects an attribute: #%s\n",
fragment);
set->nodeTab[i] = NULL;
continue;
case XML_NAMESPACE_DECL:
xmlXIncludeErr(ctxt, ctxt->incTab[nr]->ref,
XML_XINCLUDE_XPTR_RESULT,
"XPointer selects a namespace: #%s\n",
fragment);
set->nodeTab[i] = NULL;
continue;
case XML_DOCUMENT_TYPE_NODE:
case XML_DOCUMENT_FRAG_NODE:
case XML_NOTATION_NODE:
case XML_DTD_NODE:
case XML_ELEMENT_DECL:
case XML_ATTRIBUTE_DECL:
case XML_ENTITY_DECL:
case XML_XINCLUDE_START:
case XML_XINCLUDE_END:
xmlXIncludeErr(ctxt, ctxt->incTab[nr]->ref,
XML_XINCLUDE_XPTR_RESULT,
"XPointer selects unexpected nodes: #%s\n",
fragment);
set->nodeTab[i] = NULL;
set->nodeTab[i] = NULL;
continue; /* for */
}
}
}
if (doc == NULL) {
ctxt->incTab[nr]->xptr = xptr;
ctxt->incTab[nr]->inc = NULL;
} else {
ctxt->incTab[nr]->inc =
xmlXIncludeCopyXPointer(ctxt, ctxt->doc, doc, xptr);
xmlXPathFreeObject(xptr);
}
xmlXPathFreeContext(xptrctxt);
xmlFree(fragment);
}
#endif
/*
* Do the xml:base fixup if needed
*/
if ((doc != NULL) && (URL != NULL) && (xmlStrchr(URL, (xmlChar) '/'))) {
xmlNodePtr node;
node = ctxt->incTab[nr]->inc;
while (node != NULL) {
if (node->type == XML_ELEMENT_NODE)
xmlNodeSetBase(node, URL);
node = node->next;
}
}
if ((nr < ctxt->incNr) && (ctxt->incTab[nr]->doc != NULL) &&
(ctxt->incTab[nr]->count <= 1)) {
#ifdef DEBUG_XINCLUDE
printf("freeing %s\n", ctxt->incTab[nr]->doc->URL);
#endif
xmlFreeDoc(ctxt->incTab[nr]->doc);
ctxt->incTab[nr]->doc = NULL;
}
xmlFree(URL);
return(0);
}
/**
* xmlXIncludeLoadTxt:
* @ctxt: the XInclude context
* @url: the associated URL
* @nr: the xinclude node number
*
* Load the content, and store the result in the XInclude context
*
* Returns 0 in case of success, -1 in case of failure
*/
static int
xmlXIncludeLoadTxt(xmlXIncludeCtxtPtr ctxt, const xmlChar *url, int nr) {
xmlParserInputBufferPtr buf;
xmlNodePtr node;
xmlURIPtr uri;
xmlChar *URL;
int i;
xmlChar *encoding = NULL;
xmlCharEncoding enc = (xmlCharEncoding) 0;
/*
* Check the URL and remove any fragment identifier
*/
uri = xmlParseURI((const char *)url);
if (uri == NULL) {
xmlXIncludeErr(ctxt, ctxt->incTab[nr]->ref, XML_XINCLUDE_HREF_URI,
"invalid value URI %s\n", url);
return(-1);
}
if (uri->fragment != NULL) {
xmlXIncludeErr(ctxt, ctxt->incTab[nr]->ref, XML_XINCLUDE_TEXT_FRAGMENT,
"fragment identifier forbidden for text: %s\n",
(const xmlChar *) uri->fragment);
xmlFreeURI(uri);
return(-1);
}
URL = xmlSaveUri(uri);
xmlFreeURI(uri);
if (URL == NULL) {
xmlXIncludeErr(ctxt, ctxt->incTab[nr]->ref, XML_XINCLUDE_HREF_URI,
"invalid value URI %s\n", url);
return(-1);
}
/*
* Handling of references to the local document are done
* directly through ctxt->doc.
*/
if (URL[0] == 0) {
xmlXIncludeErr(ctxt, ctxt->incTab[nr]->ref,
XML_XINCLUDE_TEXT_DOCUMENT,
"text serialization of document not available\n", NULL);
xmlFree(URL);
return(-1);
}
/*
* Prevent reloading twice the document.
*/
for (i = 0; i < ctxt->txtNr; i++) {
if (xmlStrEqual(URL, ctxt->txturlTab[i])) {
node = xmlCopyNode(ctxt->txtTab[i], 1);
goto loaded;
}
}
/*
* Try to get the encoding if available
*/
if ((ctxt->incTab[nr] != NULL) && (ctxt->incTab[nr]->ref != NULL)) {
encoding = xmlGetProp(ctxt->incTab[nr]->ref, XINCLUDE_PARSE_ENCODING);
}
if (encoding != NULL) {
/*
* TODO: we should not have to remap to the xmlCharEncoding
* predefined set, a better interface than
* xmlParserInputBufferCreateFilename should allow any
* encoding supported by iconv
*/
enc = xmlParseCharEncoding((const char *) encoding);
if (enc == XML_CHAR_ENCODING_ERROR) {
xmlXIncludeErr(ctxt, ctxt->incTab[nr]->ref,
XML_XINCLUDE_UNKNOWN_ENCODING,
"encoding %s not supported\n", encoding);
xmlFree(encoding);
xmlFree(URL);
return(-1);
}
xmlFree(encoding);
}
/*
* Load it.
*/
buf = xmlParserInputBufferCreateFilename((const char *)URL, enc);
if (buf == NULL) {
xmlFree(URL);
return(-1);
}
node = xmlNewText(NULL);
/*
* Scan all chars from the resource and add the to the node
*/
while (xmlParserInputBufferRead(buf, 128) > 0) {
int len;
const xmlChar *content;
content = xmlBufferContent(buf->buffer);
len = xmlBufferLength(buf->buffer);
for (i = 0;i < len;) {
int cur;
int l;
cur = xmlStringCurrentChar(NULL, &content[i], &l);
if (!IS_CHAR(cur)) {
xmlXIncludeErr(ctxt, ctxt->incTab[nr]->ref,
XML_XINCLUDE_INVALID_CHAR,
"%s contains invalid char\n", URL);
} else {
xmlNodeAddContentLen(node, &content[i], l);
}
i += l;
}
xmlBufferShrink(buf->buffer, len);
}
xmlFreeParserInputBuffer(buf);
xmlXIncludeAddTxt(ctxt, node, URL);
loaded:
/*
* Add the element as the replacement copy.
*/
ctxt->incTab[nr]->inc = node;
xmlFree(URL);
return(0);
}
/**
* xmlXIncludeLoadFallback:
* @ctxt: the XInclude context
* @fallback: the fallback node
* @nr: the xinclude node number
*
* Load the content of the fallback node, and store the result
* in the XInclude context
*
* Returns 0 in case of success, -1 in case of failure
*/
static int
xmlXIncludeLoadFallback(xmlXIncludeCtxtPtr ctxt, xmlNodePtr fallback, int nr) {
xmlXIncludeCtxtPtr newctxt;
int ret = 0;
if ((fallback == NULL) || (ctxt == NULL))
return(-1);
if (fallback->children != NULL) {
/*
* It's possible that the fallback also has 'includes'
* (Bug 129969), so we re-process the fallback just in case
*/
newctxt = xmlXIncludeNewContext(ctxt->doc);
if (newctxt == NULL)
return (-1);
xmlXIncludeSetFlags(newctxt, ctxt->parseFlags);
ret = xmlXIncludeDoProcess(newctxt, ctxt->doc, fallback->children);
if (ctxt->nbErrors > 0)
ret = -1;
else if (ret > 0)
ret = 0; /* xmlXIncludeDoProcess can return +ve number */
xmlXIncludeFreeContext(newctxt);
ctxt->incTab[nr]->inc = xmlCopyNodeList(fallback->children);
} else {
ctxt->incTab[nr]->inc = NULL;
ctxt->incTab[nr]->emptyFb = 1; /* flag empty callback */
}
return(ret);
}
/************************************************************************
* *
* XInclude Processing *
* *
************************************************************************/
/**
* xmlXIncludePreProcessNode:
* @ctxt: an XInclude context
* @node: an XInclude node
*
* Implement the XInclude preprocessing, currently just adding the element
* for further processing.
*
* Returns the result list or NULL in case of error
*/
static xmlNodePtr
xmlXIncludePreProcessNode(xmlXIncludeCtxtPtr ctxt, xmlNodePtr node) {
xmlXIncludeAddNode(ctxt, node);
return(0);
}
/**
* xmlXIncludeLoadNode:
* @ctxt: an XInclude context
* @nr: the node number
*
* Find and load the infoset replacement for the given node.
*
* Returns 0 if substitution succeeded, -1 if some processing failed
*/
static int
xmlXIncludeLoadNode(xmlXIncludeCtxtPtr ctxt, int nr) {
xmlNodePtr cur;
xmlChar *href;
xmlChar *parse;
xmlChar *base;
xmlChar *URI;
int xml = 1; /* default Issue 64 */
int ret;
if (ctxt == NULL)
return(-1);
if ((nr < 0) || (nr >= ctxt->incNr))
return(-1);
cur = ctxt->incTab[nr]->ref;
if (cur == NULL)
return(-1);
/*
* 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);
}
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, ctxt->incTab[nr]->ref,
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 (URI == NULL) {
xmlXIncludeErr(ctxt, ctxt->incTab[nr]->ref,
XML_XINCLUDE_HREF_URI, "failed build URL\n", NULL);
if (parse != NULL)
xmlFree(parse);
if (href != NULL)
xmlFree(href);
if (base != NULL)
xmlFree(base);
return(-1);
}
#ifdef DEBUG_XINCLUDE
xmlGenericError(xmlGenericErrorContext, "parse: %s\n",
xml ? "xml": "text");
xmlGenericError(xmlGenericErrorContext, "URI: %s\n", URI);
#endif
/*
* Cleanup
*/
if (xml) {
ret = xmlXIncludeLoadDoc(ctxt, URI, nr);
/* xmlXIncludeGetFragment(ctxt, cur, URI); */
} else {
ret = xmlXIncludeLoadTxt(ctxt, URI, nr);
}
if (ret < 0) {
xmlNodePtr children;
/*
* Time to try a fallback if availble
*/
#ifdef DEBUG_XINCLUDE
xmlGenericError(xmlGenericErrorContext, "error looking for fallback\n");
#endif
children = cur->children;
while (children != NULL) {
if ((children->type == XML_ELEMENT_NODE) &&
(children->ns != NULL) &&
(xmlStrEqual(children->name, XINCLUDE_FALLBACK)) &&
((xmlStrEqual(children->ns->href, XINCLUDE_NS)) ||
(xmlStrEqual(children->ns->href, XINCLUDE_OLD_NS)))) {
ret = xmlXIncludeLoadFallback(ctxt, children, nr);
if (ret == 0)
break;
}
children = children->next;
}
}
if (ret < 0) {
xmlXIncludeErr(ctxt, ctxt->incTab[nr]->ref,
XML_XINCLUDE_NO_FALLBACK,
"could not load %s, and no fallback was found\n",
URI);
}
/*
* Cleanup
*/
if (URI != NULL)
xmlFree(URI);
if (parse != NULL)
xmlFree(parse);
if (href != NULL)
xmlFree(href);
if (base != NULL)
xmlFree(base);
return(0);
}
/**
* xmlXIncludeIncludeNode:
* @ctxt: an XInclude context
* @nr: the node number
*
* Inplement the infoset replacement for the given node
*
* Returns 0 if substitution succeeded, -1 if some processing failed
*/
static int
xmlXIncludeIncludeNode(xmlXIncludeCtxtPtr ctxt, int nr) {
xmlNodePtr cur, end, list, tmp;
if (ctxt == NULL)
return(-1);
if ((nr < 0) || (nr >= ctxt->incNr))
return(-1);
cur = ctxt->incTab[nr]->ref;
if (cur == NULL)
return(-1);
/*
* If we stored an XPointer a late computation may be needed
*/
if ((ctxt->incTab[nr]->inc == NULL) &&
(ctxt->incTab[nr]->xptr != NULL)) {
ctxt->incTab[nr]->inc =
xmlXIncludeCopyXPointer(ctxt, ctxt->doc, ctxt->doc,
ctxt->incTab[nr]->xptr);
xmlXPathFreeObject(ctxt->incTab[nr]->xptr);
ctxt->incTab[nr]->xptr = NULL;
}
list = ctxt->incTab[nr]->inc;
ctxt->incTab[nr]->inc = NULL;
/*
* Check against the risk of generating a multi-rooted document
*/
if ((cur->parent != NULL) &&
(cur->parent->type != XML_ELEMENT_NODE)) {
int nb_elem = 0;
tmp = list;
while (tmp != NULL) {
if (tmp->type == XML_ELEMENT_NODE)
nb_elem++;
tmp = tmp->next;
}
if (nb_elem > 1) {
xmlXIncludeErr(ctxt, ctxt->incTab[nr]->ref,
XML_XINCLUDE_MULTIPLE_ROOT,
"XInclude error: would result in multiple root nodes\n",
NULL);
return(-1);
}
}
/*
* Change the current node as an XInclude start one, and add an
* entity end one
*/
cur->type = XML_XINCLUDE_START;
end = xmlNewNode(cur->ns, cur->name);
if (end == NULL) {
xmlXIncludeErr(ctxt, ctxt->incTab[nr]->ref, XML_XINCLUDE_BUILD_FAILED,
"failed to build node\n", NULL);
return(-1);
}
end->type = XML_XINCLUDE_END;
xmlAddNextSibling(cur, end);
/*
* Add the list of nodes
*/
while (list != NULL) {
cur = list;
list = list->next;
xmlAddPrevSibling(end, cur);
}
return(0);
}
/**
* xmlXIncludeTestNode:
* @ctxt: the XInclude processing context
* @node: an XInclude node
*
* test if the node is an XInclude node
*
* Returns 1 true, 0 otherwise
*/
static int
xmlXIncludeTestNode(xmlXIncludeCtxtPtr ctxt, xmlNodePtr node) {
if (node == NULL)
return(0);
if (node->type != XML_ELEMENT_NODE)
return(0);
if (node->ns == NULL)
return(0);
if ((xmlStrEqual(node->ns->href, XINCLUDE_NS)) ||
(xmlStrEqual(node->ns->href, XINCLUDE_OLD_NS))) {
if (xmlStrEqual(node->ns->href, XINCLUDE_OLD_NS)) {
if (ctxt->legacy == 0) {
#if 0 /* wait for the XML Core Working Group to get something stable ! */
xmlXIncludeWarn(ctxt, node, XML_XINCLUDE_DEPRECATED_NS,
"Deprecated XInclude namespace found, use %s",
XINCLUDE_NS);
#endif
ctxt->legacy = 1;
}
}
if (xmlStrEqual(node->name, XINCLUDE_NODE)) {
xmlNodePtr child = node->children;
int nb_fallback = 0;
while (child != NULL) {
if ((child->type == XML_ELEMENT_NODE) &&
(child->ns != NULL) &&
((xmlStrEqual(child->ns->href, XINCLUDE_NS)) ||
(xmlStrEqual(child->ns->href, XINCLUDE_OLD_NS)))) {
if (xmlStrEqual(child->name, XINCLUDE_NODE)) {
xmlXIncludeErr(ctxt, node,
XML_XINCLUDE_INCLUDE_IN_INCLUDE,
"%s has an 'include' child\n",
XINCLUDE_NODE);
return(0);
}
if (xmlStrEqual(child->name, XINCLUDE_FALLBACK)) {
nb_fallback++;
}
}
child = child->next;
}
if (nb_fallback > 1) {
xmlXIncludeErr(ctxt, node, XML_XINCLUDE_FALLBACKS_IN_INCLUDE,
"%s has multiple fallback children\n",
XINCLUDE_NODE);
return(0);
}
return(1);
}
if (xmlStrEqual(node->name, XINCLUDE_FALLBACK)) {
if ((node->parent == NULL) ||
(node->parent->type != XML_ELEMENT_NODE) ||
(node->parent->ns == NULL) ||
((!xmlStrEqual(node->parent->ns->href, XINCLUDE_NS)) &&
(!xmlStrEqual(node->parent->ns->href, XINCLUDE_OLD_NS))) ||
(!xmlStrEqual(node->parent->name, XINCLUDE_NODE))) {
xmlXIncludeErr(ctxt, node,
XML_XINCLUDE_FALLBACK_NOT_IN_INCLUDE,
"%s is not the child of an 'include'\n",
XINCLUDE_FALLBACK);
}
}
}
return(0);
}
/**
* xmlXIncludeDoProcess:
* @ctxt: the XInclude processing context
* @doc: an XML document
* @tree: the top of the tree to process
*
* Implement the XInclude substitution on the XML document @doc
*
* Returns 0 if no substitution were done, -1 if some processing failed
* or the number of substitutions done.
*/
static int
xmlXIncludeDoProcess(xmlXIncludeCtxtPtr ctxt, xmlDocPtr doc, xmlNodePtr tree) {
xmlNodePtr cur;
int ret = 0;
int i;
if ((doc == NULL) || (tree == NULL))
return(-1);
if (ctxt == NULL)
return(-1);
if (doc->URL != NULL) {
ret = xmlXIncludeURLPush(ctxt, doc->URL);
if (ret < 0)
return(-1);
}
/*
* First phase: lookup the elements in the document
*/
cur = tree;
if (xmlXIncludeTestNode(ctxt, cur) == 1)
xmlXIncludePreProcessNode(ctxt, cur);
while ((cur != NULL) && (cur != tree->parent)) {
/* TODO: need to work on entities -> stack */
if ((cur->children != NULL) &&
(cur->children->type != XML_ENTITY_DECL) &&
(cur->children->type != XML_XINCLUDE_START) &&
(cur->children->type != XML_XINCLUDE_END)) {
cur = cur->children;
if (xmlXIncludeTestNode(ctxt, cur))
xmlXIncludePreProcessNode(ctxt, cur);
} else if (cur->next != NULL) {
cur = cur->next;
if (xmlXIncludeTestNode(ctxt, cur))
xmlXIncludePreProcessNode(ctxt, cur);
} else {
if (cur == tree)
break;
do {
cur = cur->parent;
if ((cur == NULL) || (cur == tree->parent))
break; /* do */
if (cur->next != NULL) {
cur = cur->next;
if (xmlXIncludeTestNode(ctxt, cur))
xmlXIncludePreProcessNode(ctxt, cur);
break; /* do */
}
} while (cur != NULL);
}
}
/*
* Second Phase : collect the infosets fragments
*/
for (i = ctxt->incBase;i < ctxt->incNr; i++) {
xmlXIncludeLoadNode(ctxt, i);
ret++;
}
/*
* Third phase: extend the original document infoset.
*
* Originally we bypassed the inclusion if there were any errors
* encountered on any of the XIncludes. A bug was raised (bug
* 132588) requesting that we output the XIncludes without error,
* so the check for inc!=NULL || xptr!=NULL was put in. This may
* give some other problems in the future, but for now it seems to
* work ok.
*
*/
for (i = ctxt->incBase;i < ctxt->incNr; i++) {
if ((ctxt->incTab[i]->inc != NULL) ||
(ctxt->incTab[i]->xptr != NULL) ||
(ctxt->incTab[i]->emptyFb != 0)) /* (empty fallback) */
xmlXIncludeIncludeNode(ctxt, i);
}
if (doc->URL != NULL)
xmlXIncludeURLPop(ctxt);
return(ret);
}
/**
* xmlXIncludeSetFlags:
* @ctxt: an XInclude processing context
* @flags: a set of xmlParserOption used for parsing XML includes
*
* Set the flags used for further processing of XML resources.
*
* Returns 0 in case of success and -1 in case of error.
*/
int
xmlXIncludeSetFlags(xmlXIncludeCtxtPtr ctxt, int flags) {
if (ctxt == NULL)
return(-1);
ctxt->parseFlags = flags;
return(0);
}
/**
* xmlXIncludeProcessFlags:
* @doc: an XML document
* @flags: a set of xmlParserOption used for parsing XML includes
*
* Implement the XInclude substitution on the XML document @doc
*
* Returns 0 if no substitution were done, -1 if some processing failed
* or the number of substitutions done.
*/
int
xmlXIncludeProcessFlags(xmlDocPtr doc, int flags) {
xmlXIncludeCtxtPtr ctxt;
xmlNodePtr tree;
int ret = 0;
if (doc == NULL)
return(-1);
tree = xmlDocGetRootElement(doc);
if (tree == NULL)
return(-1);
ctxt = xmlXIncludeNewContext(doc);
if (ctxt == NULL)
return(-1);
xmlXIncludeSetFlags(ctxt, flags);
ret = xmlXIncludeDoProcess(ctxt, doc, tree);
if ((ret >= 0) && (ctxt->nbErrors > 0))
ret = -1;
xmlXIncludeFreeContext(ctxt);
return(ret);
}
/**
* xmlXIncludeProcess:
* @doc: an XML document
*
* Implement the XInclude substitution on the XML document @doc
*
* Returns 0 if no substitution were done, -1 if some processing failed
* or the number of substitutions done.
*/
int
xmlXIncludeProcess(xmlDocPtr doc) {
return(xmlXIncludeProcessFlags(doc, 0));
}
/**
* xmlXIncludeProcessTreeFlags:
* @tree: a node in an XML document
* @flags: a set of xmlParserOption used for parsing XML includes
*
* Implement the XInclude substitution for the given subtree
*
* Returns 0 if no substitution were done, -1 if some processing failed
* or the number of substitutions done.
*/
int
xmlXIncludeProcessTreeFlags(xmlNodePtr tree, int flags) {
xmlXIncludeCtxtPtr ctxt;
int ret = 0;
if ((tree == NULL) || (tree->doc == NULL))
return(-1);
ctxt = xmlXIncludeNewContext(tree->doc);
if (ctxt == NULL)
return(-1);
xmlXIncludeSetFlags(ctxt, flags);
ret = xmlXIncludeDoProcess(ctxt, tree->doc, tree);
if ((ret >= 0) && (ctxt->nbErrors > 0))
ret = -1;
xmlXIncludeFreeContext(ctxt);
return(ret);
}
/**
* xmlXIncludeProcessTree:
* @tree: a node in an XML document
*
* Implement the XInclude substitution for the given subtree
*
* Returns 0 if no substitution were done, -1 if some processing failed
* or the number of substitutions done.
*/
int
xmlXIncludeProcessTree(xmlNodePtr tree) {
return(xmlXIncludeProcessTreeFlags(tree, 0));
}
/**
* xmlXIncludeProcessNode:
* @ctxt: an existing XInclude context
* @node: a node in an XML document
*
* Implement the XInclude substitution for the given subtree reusing
* the informations and data coming from the given context.
*
* Returns 0 if no substitution were done, -1 if some processing failed
* or the number of substitutions done.
*/
int
xmlXIncludeProcessNode(xmlXIncludeCtxtPtr ctxt, xmlNodePtr node) {
int ret = 0;
if ((node == NULL) || (node->doc == NULL) || (ctxt == NULL))
return(-1);
ret = xmlXIncludeDoProcess(ctxt, node->doc, node);
if ((ret >= 0) && (ctxt->nbErrors > 0))
ret = -1;
return(ret);
}
#else /* !LIBXML_XINCLUDE_ENABLED */
#endif
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