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valid.c
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valid.c
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/*
* valid.c : part of the code use to do the DTD handling and the validity
* checking
*
* See Copyright for the status of this software.
*
* daniel@veillard.com
*/
#define IN_LIBXML
#include "libxml.h"
#include <string.h>
#include <stdlib.h>
#include <libxml/xmlmemory.h>
#include <libxml/hash.h>
#include <libxml/uri.h>
#include <libxml/valid.h>
#include <libxml/parser.h>
#include <libxml/parserInternals.h>
#include <libxml/xmlerror.h>
#include <libxml/list.h>
#include <libxml/xmlsave.h>
#include "private/error.h"
#include "private/parser.h"
#include "private/regexp.h"
#include "private/save.h"
#include "private/tree.h"
static xmlElementPtr
xmlGetDtdElementDesc2(xmlValidCtxtPtr ctxt, xmlDtdPtr dtd, const xmlChar *name);
#ifdef LIBXML_VALID_ENABLED
static int
xmlValidateAttributeValueInternal(xmlDocPtr doc, xmlAttributeType type,
const xmlChar *value);
#endif
/************************************************************************
* *
* Error handling routines *
* *
************************************************************************/
/**
* xmlVErrMemory:
* @ctxt: an XML validation parser context
* @extra: extra information
*
* Handle an out of memory error
*/
static void
xmlVErrMemory(xmlValidCtxtPtr ctxt)
{
if (ctxt != NULL) {
if (ctxt->flags & XML_VCTXT_USE_PCTXT) {
xmlCtxtErrMemory(ctxt->userData);
} else {
xmlRaiseMemoryError(NULL, ctxt->error, ctxt->userData,
XML_FROM_VALID, NULL);
}
} else {
xmlRaiseMemoryError(NULL, NULL, NULL, XML_FROM_VALID, NULL);
}
}
static void
xmlDoErrValid(xmlValidCtxtPtr ctxt, xmlNodePtr node,
xmlParserErrors code, int level,
const xmlChar *str1, const xmlChar *str2, const xmlChar *str3,
int int1,
const char *msg, ...) {
xmlParserCtxtPtr pctxt = NULL;
va_list ap;
if (ctxt == NULL)
return;
if (ctxt->flags & XML_VCTXT_USE_PCTXT)
pctxt = ctxt->userData;
va_start(ap, msg);
if (pctxt != NULL) {
xmlCtxtVErr(pctxt, node, XML_FROM_VALID, code, level,
str1, str2, str3, int1, msg, ap);
} else {
xmlGenericErrorFunc channel = NULL;
void *data = NULL;
int res;
if (ctxt != NULL) {
channel = ctxt->error;
data = ctxt->userData;
}
res = xmlVRaiseError(NULL, channel, data, NULL, node,
XML_FROM_VALID, code, level, NULL, 0,
(const char *) str1, (const char *) str2,
(const char *) str2, int1, 0,
msg, ap);
if (res < 0)
xmlVErrMemory(ctxt);
}
va_end(ap);
}
/**
* xmlErrValid:
* @ctxt: an XML validation parser context
* @error: the error number
* @extra: extra information
*
* Handle a validation error
*/
static void LIBXML_ATTR_FORMAT(3,0)
xmlErrValid(xmlValidCtxtPtr ctxt, xmlParserErrors error,
const char *msg, const char *extra)
{
xmlDoErrValid(ctxt, NULL, error, XML_ERR_ERROR, (const xmlChar *) extra,
NULL, NULL, 0, msg, extra);
}
#if defined(LIBXML_VALID_ENABLED) || defined(LIBXML_SCHEMAS_ENABLED)
/**
* xmlErrValidNode:
* @ctxt: an XML validation parser context
* @node: the node raising the error
* @error: the error number
* @str1: extra information
* @str2: extra information
* @str3: extra information
*
* Handle a validation error, provide contextual information
*/
static void LIBXML_ATTR_FORMAT(4,0)
xmlErrValidNode(xmlValidCtxtPtr ctxt,
xmlNodePtr node, xmlParserErrors error,
const char *msg, const xmlChar * str1,
const xmlChar * str2, const xmlChar * str3)
{
xmlDoErrValid(ctxt, node, error, XML_ERR_ERROR, str1, str2, str3, 0,
msg, str1, str2, str3);
}
#endif /* LIBXML_VALID_ENABLED or LIBXML_SCHEMAS_ENABLED */
#ifdef LIBXML_VALID_ENABLED
/**
* xmlErrValidNodeNr:
* @ctxt: an XML validation parser context
* @node: the node raising the error
* @error: the error number
* @str1: extra information
* @int2: extra information
* @str3: extra information
*
* Handle a validation error, provide contextual information
*/
static void LIBXML_ATTR_FORMAT(4,0)
xmlErrValidNodeNr(xmlValidCtxtPtr ctxt,
xmlNodePtr node, xmlParserErrors error,
const char *msg, const xmlChar * str1,
int int2, const xmlChar * str3)
{
xmlDoErrValid(ctxt, node, error, XML_ERR_ERROR, str1, str3, NULL, int2,
msg, str1, int2, str3);
}
/**
* xmlErrValidWarning:
* @ctxt: an XML validation parser context
* @node: the node raising the error
* @error: the error number
* @str1: extra information
* @str2: extra information
* @str3: extra information
*
* Handle a validation error, provide contextual information
*/
static void LIBXML_ATTR_FORMAT(4,0)
xmlErrValidWarning(xmlValidCtxtPtr ctxt,
xmlNodePtr node, xmlParserErrors error,
const char *msg, const xmlChar * str1,
const xmlChar * str2, const xmlChar * str3)
{
xmlDoErrValid(ctxt, node, error, XML_ERR_WARNING, str1, str2, str3, 0,
msg, str1, str2, str3);
}
#ifdef LIBXML_REGEXP_ENABLED
/*
* If regexp are enabled we can do continuous validation without the
* need of a tree to validate the content model. this is done in each
* callbacks.
* Each xmlValidState represent the validation state associated to the
* set of nodes currently open from the document root to the current element.
*/
typedef struct _xmlValidState {
xmlElementPtr elemDecl; /* pointer to the content model */
xmlNodePtr node; /* pointer to the current node */
xmlRegExecCtxtPtr exec; /* regexp runtime */
} _xmlValidState;
static int
vstateVPush(xmlValidCtxtPtr ctxt, xmlElementPtr elemDecl, xmlNodePtr node) {
if ((ctxt->vstateMax == 0) || (ctxt->vstateTab == NULL)) {
ctxt->vstateMax = 10;
ctxt->vstateTab = (xmlValidState *) xmlMalloc(ctxt->vstateMax *
sizeof(ctxt->vstateTab[0]));
if (ctxt->vstateTab == NULL) {
xmlVErrMemory(ctxt);
return(-1);
}
}
if (ctxt->vstateNr >= ctxt->vstateMax) {
xmlValidState *tmp;
tmp = (xmlValidState *) xmlRealloc(ctxt->vstateTab,
2 * ctxt->vstateMax * sizeof(ctxt->vstateTab[0]));
if (tmp == NULL) {
xmlVErrMemory(ctxt);
return(-1);
}
ctxt->vstateMax *= 2;
ctxt->vstateTab = tmp;
}
ctxt->vstate = &ctxt->vstateTab[ctxt->vstateNr];
ctxt->vstateTab[ctxt->vstateNr].elemDecl = elemDecl;
ctxt->vstateTab[ctxt->vstateNr].node = node;
if ((elemDecl != NULL) && (elemDecl->etype == XML_ELEMENT_TYPE_ELEMENT)) {
if (elemDecl->contModel == NULL)
xmlValidBuildContentModel(ctxt, elemDecl);
if (elemDecl->contModel != NULL) {
ctxt->vstateTab[ctxt->vstateNr].exec =
xmlRegNewExecCtxt(elemDecl->contModel, NULL, NULL);
if (ctxt->vstateTab[ctxt->vstateNr].exec == NULL) {
xmlVErrMemory(ctxt);
return(-1);
}
} else {
ctxt->vstateTab[ctxt->vstateNr].exec = NULL;
xmlErrValidNode(ctxt, (xmlNodePtr) elemDecl,
XML_ERR_INTERNAL_ERROR,
"Failed to build content model regexp for %s\n",
node->name, NULL, NULL);
}
}
return(ctxt->vstateNr++);
}
static int
vstateVPop(xmlValidCtxtPtr ctxt) {
xmlElementPtr elemDecl;
if (ctxt->vstateNr < 1) return(-1);
ctxt->vstateNr--;
elemDecl = ctxt->vstateTab[ctxt->vstateNr].elemDecl;
ctxt->vstateTab[ctxt->vstateNr].elemDecl = NULL;
ctxt->vstateTab[ctxt->vstateNr].node = NULL;
if ((elemDecl != NULL) && (elemDecl->etype == XML_ELEMENT_TYPE_ELEMENT)) {
xmlRegFreeExecCtxt(ctxt->vstateTab[ctxt->vstateNr].exec);
}
ctxt->vstateTab[ctxt->vstateNr].exec = NULL;
if (ctxt->vstateNr >= 1)
ctxt->vstate = &ctxt->vstateTab[ctxt->vstateNr - 1];
else
ctxt->vstate = NULL;
return(ctxt->vstateNr);
}
#else /* not LIBXML_REGEXP_ENABLED */
/*
* If regexp are not enabled, it uses a home made algorithm less
* complex and easier to
* debug/maintain than a generic NFA -> DFA state based algo. The
* only restriction is on the deepness of the tree limited by the
* size of the occurs bitfield
*
* this is the content of a saved state for rollbacks
*/
#define ROLLBACK_OR 0
#define ROLLBACK_PARENT 1
typedef struct _xmlValidState {
xmlElementContentPtr cont; /* pointer to the content model subtree */
xmlNodePtr node; /* pointer to the current node in the list */
long occurs;/* bitfield for multiple occurrences */
unsigned char depth; /* current depth in the overall tree */
unsigned char state; /* ROLLBACK_XXX */
} _xmlValidState;
#define MAX_RECURSE 25000
#define MAX_DEPTH ((sizeof(_xmlValidState.occurs)) * 8)
#define CONT ctxt->vstate->cont
#define NODE ctxt->vstate->node
#define DEPTH ctxt->vstate->depth
#define OCCURS ctxt->vstate->occurs
#define STATE ctxt->vstate->state
#define OCCURRENCE (ctxt->vstate->occurs & (1 << DEPTH))
#define PARENT_OCCURRENCE (ctxt->vstate->occurs & ((1 << DEPTH) - 1))
#define SET_OCCURRENCE ctxt->vstate->occurs |= (1 << DEPTH)
#define RESET_OCCURRENCE ctxt->vstate->occurs &= ((1 << DEPTH) - 1)
static int
vstateVPush(xmlValidCtxtPtr ctxt, xmlElementContentPtr cont,
xmlNodePtr node, unsigned char depth, long occurs,
unsigned char state) {
int i = ctxt->vstateNr - 1;
if (ctxt->vstateNr > MAX_RECURSE) {
return(-1);
}
if (ctxt->vstateTab == NULL) {
ctxt->vstateMax = 8;
ctxt->vstateTab = (xmlValidState *) xmlMalloc(
ctxt->vstateMax * sizeof(ctxt->vstateTab[0]));
if (ctxt->vstateTab == NULL) {
xmlVErrMemory(ctxt);
return(-1);
}
}
if (ctxt->vstateNr >= ctxt->vstateMax) {
xmlValidState *tmp;
tmp = (xmlValidState *) xmlRealloc(ctxt->vstateTab,
2 * ctxt->vstateMax * sizeof(ctxt->vstateTab[0]));
if (tmp == NULL) {
xmlVErrMemory(ctxt);
return(-1);
}
ctxt->vstateMax *= 2;
ctxt->vstateTab = tmp;
ctxt->vstate = &ctxt->vstateTab[0];
}
/*
* Don't push on the stack a state already here
*/
if ((i >= 0) && (ctxt->vstateTab[i].cont == cont) &&
(ctxt->vstateTab[i].node == node) &&
(ctxt->vstateTab[i].depth == depth) &&
(ctxt->vstateTab[i].occurs == occurs) &&
(ctxt->vstateTab[i].state == state))
return(ctxt->vstateNr);
ctxt->vstateTab[ctxt->vstateNr].cont = cont;
ctxt->vstateTab[ctxt->vstateNr].node = node;
ctxt->vstateTab[ctxt->vstateNr].depth = depth;
ctxt->vstateTab[ctxt->vstateNr].occurs = occurs;
ctxt->vstateTab[ctxt->vstateNr].state = state;
return(ctxt->vstateNr++);
}
static int
vstateVPop(xmlValidCtxtPtr ctxt) {
if (ctxt->vstateNr <= 1) return(-1);
ctxt->vstateNr--;
ctxt->vstate = &ctxt->vstateTab[0];
ctxt->vstate->cont = ctxt->vstateTab[ctxt->vstateNr].cont;
ctxt->vstate->node = ctxt->vstateTab[ctxt->vstateNr].node;
ctxt->vstate->depth = ctxt->vstateTab[ctxt->vstateNr].depth;
ctxt->vstate->occurs = ctxt->vstateTab[ctxt->vstateNr].occurs;
ctxt->vstate->state = ctxt->vstateTab[ctxt->vstateNr].state;
return(ctxt->vstateNr);
}
#endif /* LIBXML_REGEXP_ENABLED */
static int
nodeVPush(xmlValidCtxtPtr ctxt, xmlNodePtr value)
{
if (ctxt->nodeMax <= 0) {
ctxt->nodeMax = 4;
ctxt->nodeTab =
(xmlNodePtr *) xmlMalloc(ctxt->nodeMax *
sizeof(ctxt->nodeTab[0]));
if (ctxt->nodeTab == NULL) {
xmlVErrMemory(ctxt);
ctxt->nodeMax = 0;
return (0);
}
}
if (ctxt->nodeNr >= ctxt->nodeMax) {
xmlNodePtr *tmp;
tmp = (xmlNodePtr *) xmlRealloc(ctxt->nodeTab,
ctxt->nodeMax * 2 * sizeof(ctxt->nodeTab[0]));
if (tmp == NULL) {
xmlVErrMemory(ctxt);
return (0);
}
ctxt->nodeMax *= 2;
ctxt->nodeTab = tmp;
}
ctxt->nodeTab[ctxt->nodeNr] = value;
ctxt->node = value;
return (ctxt->nodeNr++);
}
static xmlNodePtr
nodeVPop(xmlValidCtxtPtr ctxt)
{
xmlNodePtr ret;
if (ctxt->nodeNr <= 0)
return (NULL);
ctxt->nodeNr--;
if (ctxt->nodeNr > 0)
ctxt->node = ctxt->nodeTab[ctxt->nodeNr - 1];
else
ctxt->node = NULL;
ret = ctxt->nodeTab[ctxt->nodeNr];
ctxt->nodeTab[ctxt->nodeNr] = NULL;
return (ret);
}
/* TODO: use hash table for accesses to elem and attribute definitions */
#define CHECK_DTD \
if (doc == NULL) return(0); \
else if ((doc->intSubset == NULL) && \
(doc->extSubset == NULL)) return(0)
#ifdef LIBXML_REGEXP_ENABLED
/************************************************************************
* *
* Content model validation based on the regexps *
* *
************************************************************************/
/**
* xmlValidBuildAContentModel:
* @content: the content model
* @ctxt: the schema parser context
* @name: the element name whose content is being built
*
* Generate the automata sequence needed for that type
*
* Returns 1 if successful or 0 in case of error.
*/
static int
xmlValidBuildAContentModel(xmlElementContentPtr content,
xmlValidCtxtPtr ctxt,
const xmlChar *name) {
if (content == NULL) {
xmlErrValidNode(ctxt, NULL, XML_ERR_INTERNAL_ERROR,
"Found NULL content in content model of %s\n",
name, NULL, NULL);
return(0);
}
switch (content->type) {
case XML_ELEMENT_CONTENT_PCDATA:
xmlErrValidNode(ctxt, NULL, XML_ERR_INTERNAL_ERROR,
"Found PCDATA in content model of %s\n",
name, NULL, NULL);
return(0);
break;
case XML_ELEMENT_CONTENT_ELEMENT: {
xmlAutomataStatePtr oldstate = ctxt->state;
xmlChar fn[50];
xmlChar *fullname;
fullname = xmlBuildQName(content->name, content->prefix, fn, 50);
if (fullname == NULL) {
xmlVErrMemory(ctxt);
return(0);
}
switch (content->ocur) {
case XML_ELEMENT_CONTENT_ONCE:
ctxt->state = xmlAutomataNewTransition(ctxt->am,
ctxt->state, NULL, fullname, NULL);
break;
case XML_ELEMENT_CONTENT_OPT:
ctxt->state = xmlAutomataNewTransition(ctxt->am,
ctxt->state, NULL, fullname, NULL);
xmlAutomataNewEpsilon(ctxt->am, oldstate, ctxt->state);
break;
case XML_ELEMENT_CONTENT_PLUS:
ctxt->state = xmlAutomataNewTransition(ctxt->am,
ctxt->state, NULL, fullname, NULL);
xmlAutomataNewTransition(ctxt->am, ctxt->state,
ctxt->state, fullname, NULL);
break;
case XML_ELEMENT_CONTENT_MULT:
ctxt->state = xmlAutomataNewEpsilon(ctxt->am,
ctxt->state, NULL);
xmlAutomataNewTransition(ctxt->am,
ctxt->state, ctxt->state, fullname, NULL);
break;
}
if ((fullname != fn) && (fullname != content->name))
xmlFree(fullname);
break;
}
case XML_ELEMENT_CONTENT_SEQ: {
xmlAutomataStatePtr oldstate, oldend;
xmlElementContentOccur ocur;
/*
* Simply iterate over the content
*/
oldstate = ctxt->state;
ocur = content->ocur;
if (ocur != XML_ELEMENT_CONTENT_ONCE) {
ctxt->state = xmlAutomataNewEpsilon(ctxt->am, oldstate, NULL);
oldstate = ctxt->state;
}
do {
if (xmlValidBuildAContentModel(content->c1, ctxt, name) == 0)
return(0);
content = content->c2;
} while ((content->type == XML_ELEMENT_CONTENT_SEQ) &&
(content->ocur == XML_ELEMENT_CONTENT_ONCE));
if (xmlValidBuildAContentModel(content, ctxt, name) == 0)
return(0);
oldend = ctxt->state;
ctxt->state = xmlAutomataNewEpsilon(ctxt->am, oldend, NULL);
switch (ocur) {
case XML_ELEMENT_CONTENT_ONCE:
break;
case XML_ELEMENT_CONTENT_OPT:
xmlAutomataNewEpsilon(ctxt->am, oldstate, ctxt->state);
break;
case XML_ELEMENT_CONTENT_MULT:
xmlAutomataNewEpsilon(ctxt->am, oldstate, ctxt->state);
xmlAutomataNewEpsilon(ctxt->am, oldend, oldstate);
break;
case XML_ELEMENT_CONTENT_PLUS:
xmlAutomataNewEpsilon(ctxt->am, oldend, oldstate);
break;
}
break;
}
case XML_ELEMENT_CONTENT_OR: {
xmlAutomataStatePtr oldstate, oldend;
xmlElementContentOccur ocur;
ocur = content->ocur;
if ((ocur == XML_ELEMENT_CONTENT_PLUS) ||
(ocur == XML_ELEMENT_CONTENT_MULT)) {
ctxt->state = xmlAutomataNewEpsilon(ctxt->am,
ctxt->state, NULL);
}
oldstate = ctxt->state;
oldend = xmlAutomataNewState(ctxt->am);
/*
* iterate over the subtypes and remerge the end with an
* epsilon transition
*/
do {
ctxt->state = oldstate;
if (xmlValidBuildAContentModel(content->c1, ctxt, name) == 0)
return(0);
xmlAutomataNewEpsilon(ctxt->am, ctxt->state, oldend);
content = content->c2;
} while ((content->type == XML_ELEMENT_CONTENT_OR) &&
(content->ocur == XML_ELEMENT_CONTENT_ONCE));
ctxt->state = oldstate;
if (xmlValidBuildAContentModel(content, ctxt, name) == 0)
return(0);
xmlAutomataNewEpsilon(ctxt->am, ctxt->state, oldend);
ctxt->state = xmlAutomataNewEpsilon(ctxt->am, oldend, NULL);
switch (ocur) {
case XML_ELEMENT_CONTENT_ONCE:
break;
case XML_ELEMENT_CONTENT_OPT:
xmlAutomataNewEpsilon(ctxt->am, oldstate, ctxt->state);
break;
case XML_ELEMENT_CONTENT_MULT:
xmlAutomataNewEpsilon(ctxt->am, oldstate, ctxt->state);
xmlAutomataNewEpsilon(ctxt->am, oldend, oldstate);
break;
case XML_ELEMENT_CONTENT_PLUS:
xmlAutomataNewEpsilon(ctxt->am, oldend, oldstate);
break;
}
break;
}
default:
xmlErrValid(ctxt, XML_ERR_INTERNAL_ERROR,
"ContentModel broken for element %s\n",
(const char *) name);
return(0);
}
return(1);
}
/**
* xmlValidBuildContentModel:
* @ctxt: a validation context
* @elem: an element declaration node
*
* DEPRECATED: Internal function, don't use.
*
* (Re)Build the automata associated to the content model of this
* element
*
* Returns 1 in case of success, 0 in case of error
*/
int
xmlValidBuildContentModel(xmlValidCtxtPtr ctxt, xmlElementPtr elem) {
int ret = 0;
if ((ctxt == NULL) || (elem == NULL))
return(0);
if (elem->type != XML_ELEMENT_DECL)
return(0);
if (elem->etype != XML_ELEMENT_TYPE_ELEMENT)
return(1);
/* TODO: should we rebuild in this case ? */
if (elem->contModel != NULL) {
if (!xmlRegexpIsDeterminist(elem->contModel)) {
ctxt->valid = 0;
return(0);
}
return(1);
}
ctxt->am = xmlNewAutomata();
if (ctxt->am == NULL) {
xmlVErrMemory(ctxt);
return(0);
}
ctxt->state = xmlAutomataGetInitState(ctxt->am);
if (xmlValidBuildAContentModel(elem->content, ctxt, elem->name) == 0)
goto done;
xmlAutomataSetFinalState(ctxt->am, ctxt->state);
elem->contModel = xmlAutomataCompile(ctxt->am);
if (elem->contModel == NULL) {
xmlVErrMemory(ctxt);
goto done;
}
if (xmlRegexpIsDeterminist(elem->contModel) != 1) {
char expr[5000];
expr[0] = 0;
xmlSnprintfElementContent(expr, 5000, elem->content, 1);
xmlErrValidNode(ctxt, (xmlNodePtr) elem,
XML_DTD_CONTENT_NOT_DETERMINIST,
"Content model of %s is not deterministic: %s\n",
elem->name, BAD_CAST expr, NULL);
ctxt->valid = 0;
goto done;
}
ret = 1;
done:
ctxt->state = NULL;
xmlFreeAutomata(ctxt->am);
ctxt->am = NULL;
return(ret);
}
#endif /* LIBXML_REGEXP_ENABLED */
/****************************************************************
* *
* Util functions for data allocation/deallocation *
* *
****************************************************************/
/**
* xmlNewValidCtxt:
*
* Allocate a validation context structure.
*
* Returns NULL if not, otherwise the new validation context structure
*/
xmlValidCtxtPtr xmlNewValidCtxt(void) {
xmlValidCtxtPtr ret;
if ((ret = xmlMalloc(sizeof (xmlValidCtxt))) == NULL)
return (NULL);
(void) memset(ret, 0, sizeof (xmlValidCtxt));
return (ret);
}
/**
* xmlFreeValidCtxt:
* @cur: the validation context to free
*
* Free a validation context structure.
*/
void
xmlFreeValidCtxt(xmlValidCtxtPtr cur) {
if (cur == NULL)
return;
if (cur->vstateTab != NULL)
xmlFree(cur->vstateTab);
if (cur->nodeTab != NULL)
xmlFree(cur->nodeTab);
xmlFree(cur);
}
#endif /* LIBXML_VALID_ENABLED */
/**
* xmlNewDocElementContent:
* @doc: the document
* @name: the subelement name or NULL
* @type: the type of element content decl
*
* Allocate an element content structure for the document.
*
* Returns NULL if not, otherwise the new element content structure
*/
xmlElementContentPtr
xmlNewDocElementContent(xmlDocPtr doc, const xmlChar *name,
xmlElementContentType type) {
xmlElementContentPtr ret;
xmlDictPtr dict = NULL;
if (doc != NULL)
dict = doc->dict;
switch(type) {
case XML_ELEMENT_CONTENT_ELEMENT:
if (name == NULL) {
xmlErrValid(NULL, XML_ERR_INTERNAL_ERROR,
"xmlNewElementContent : name == NULL !\n",
NULL);
}
break;
case XML_ELEMENT_CONTENT_PCDATA:
case XML_ELEMENT_CONTENT_SEQ:
case XML_ELEMENT_CONTENT_OR:
if (name != NULL) {
xmlErrValid(NULL, XML_ERR_INTERNAL_ERROR,
"xmlNewElementContent : name != NULL !\n",
NULL);
}
break;
default:
xmlErrValid(NULL, XML_ERR_INTERNAL_ERROR,
"Internal: ELEMENT content corrupted invalid type\n",
NULL);
return(NULL);
}
ret = (xmlElementContentPtr) xmlMalloc(sizeof(xmlElementContent));
if (ret == NULL)
return(NULL);
memset(ret, 0, sizeof(xmlElementContent));
ret->type = type;
ret->ocur = XML_ELEMENT_CONTENT_ONCE;
if (name != NULL) {
int l;
const xmlChar *tmp;
tmp = xmlSplitQName3(name, &l);
if (tmp == NULL) {
if (dict == NULL)
ret->name = xmlStrdup(name);
else
ret->name = xmlDictLookup(dict, name, -1);
} else {
if (dict == NULL) {
ret->prefix = xmlStrndup(name, l);
ret->name = xmlStrdup(tmp);
} else {
ret->prefix = xmlDictLookup(dict, name, l);
ret->name = xmlDictLookup(dict, tmp, -1);
}
if (ret->prefix == NULL)
goto error;
}
if (ret->name == NULL)
goto error;
}
return(ret);
error:
xmlFreeDocElementContent(doc, ret);
return(NULL);
}
/**
* xmlNewElementContent:
* @name: the subelement name or NULL
* @type: the type of element content decl
*
* Allocate an element content structure.
* Deprecated in favor of xmlNewDocElementContent
*
* Returns NULL if not, otherwise the new element content structure
*/
xmlElementContentPtr
xmlNewElementContent(const xmlChar *name, xmlElementContentType type) {
return(xmlNewDocElementContent(NULL, name, type));
}
/**
* xmlCopyDocElementContent:
* @doc: the document owning the element declaration
* @cur: An element content pointer.
*
* Build a copy of an element content description.
*
* Returns the new xmlElementContentPtr or NULL in case of error.
*/
xmlElementContentPtr
xmlCopyDocElementContent(xmlDocPtr doc, xmlElementContentPtr cur) {
xmlElementContentPtr ret = NULL, prev = NULL, tmp;
xmlDictPtr dict = NULL;
if (cur == NULL) return(NULL);
if (doc != NULL)
dict = doc->dict;
ret = (xmlElementContentPtr) xmlMalloc(sizeof(xmlElementContent));
if (ret == NULL)
return(NULL);
memset(ret, 0, sizeof(xmlElementContent));
ret->type = cur->type;
ret->ocur = cur->ocur;
if (cur->name != NULL) {
if (dict)
ret->name = xmlDictLookup(dict, cur->name, -1);
else
ret->name = xmlStrdup(cur->name);
if (ret->name == NULL)
goto error;
}
if (cur->prefix != NULL) {
if (dict)
ret->prefix = xmlDictLookup(dict, cur->prefix, -1);
else
ret->prefix = xmlStrdup(cur->prefix);
if (ret->prefix == NULL)
goto error;
}
if (cur->c1 != NULL) {
ret->c1 = xmlCopyDocElementContent(doc, cur->c1);
if (ret->c1 == NULL)
goto error;
ret->c1->parent = ret;
}
if (cur->c2 != NULL) {
prev = ret;
cur = cur->c2;
while (cur != NULL) {
tmp = (xmlElementContentPtr) xmlMalloc(sizeof(xmlElementContent));
if (tmp == NULL)
goto error;
memset(tmp, 0, sizeof(xmlElementContent));
tmp->type = cur->type;
tmp->ocur = cur->ocur;
prev->c2 = tmp;
tmp->parent = prev;
if (cur->name != NULL) {
if (dict)
tmp->name = xmlDictLookup(dict, cur->name, -1);
else
tmp->name = xmlStrdup(cur->name);
if (tmp->name == NULL)
goto error;
}
if (cur->prefix != NULL) {
if (dict)
tmp->prefix = xmlDictLookup(dict, cur->prefix, -1);
else
tmp->prefix = xmlStrdup(cur->prefix);
if (tmp->prefix == NULL)
goto error;
}
if (cur->c1 != NULL) {
tmp->c1 = xmlCopyDocElementContent(doc,cur->c1);
if (tmp->c1 == NULL)
goto error;
tmp->c1->parent = tmp;
}
prev = tmp;
cur = cur->c2;
}
}
return(ret);
error:
xmlFreeElementContent(ret);
return(NULL);
}
/**
* xmlCopyElementContent:
* @cur: An element content pointer.
*
* Build a copy of an element content description.
* Deprecated, use xmlCopyDocElementContent instead
*
* Returns the new xmlElementContentPtr or NULL in case of error.
*/
xmlElementContentPtr
xmlCopyElementContent(xmlElementContentPtr cur) {
return(xmlCopyDocElementContent(NULL, cur));
}
/**
* xmlFreeDocElementContent:
* @doc: the document owning the element declaration
* @cur: the element content tree to free
*
* Free an element content structure. The whole subtree is removed.
*/
void
xmlFreeDocElementContent(xmlDocPtr doc, xmlElementContentPtr cur) {
xmlDictPtr dict = NULL;
size_t depth = 0;
if (cur == NULL)
return;
if (doc != NULL)
dict = doc->dict;
while (1) {
xmlElementContentPtr parent;
while ((cur->c1 != NULL) || (cur->c2 != NULL)) {
cur = (cur->c1 != NULL) ? cur->c1 : cur->c2;
depth += 1;
}
switch (cur->type) {
case XML_ELEMENT_CONTENT_PCDATA:
case XML_ELEMENT_CONTENT_ELEMENT:
case XML_ELEMENT_CONTENT_SEQ:
case XML_ELEMENT_CONTENT_OR:
break;
default:
xmlErrValid(NULL, XML_ERR_INTERNAL_ERROR,
"Internal: ELEMENT content corrupted invalid type\n",
NULL);
return;
}
if (dict) {
if ((cur->name != NULL) && (!xmlDictOwns(dict, cur->name)))
xmlFree((xmlChar *) cur->name);
if ((cur->prefix != NULL) && (!xmlDictOwns(dict, cur->prefix)))
xmlFree((xmlChar *) cur->prefix);
} else {
if (cur->name != NULL) xmlFree((xmlChar *) cur->name);
if (cur->prefix != NULL) xmlFree((xmlChar *) cur->prefix);
}
parent = cur->parent;
if ((depth == 0) || (parent == NULL)) {
xmlFree(cur);
break;
}
if (cur == parent->c1)
parent->c1 = NULL;
else
parent->c2 = NULL;
xmlFree(cur);
if (parent->c2 != NULL) {
cur = parent->c2;
} else {
depth -= 1;
cur = parent;
}
}
}
/**
* xmlFreeElementContent:
* @cur: the element content tree to free
*
* Free an element content structure. The whole subtree is removed.
* Deprecated, use xmlFreeDocElementContent instead
*/
void
xmlFreeElementContent(xmlElementContentPtr cur) {
xmlFreeDocElementContent(NULL, cur);
}
#ifdef LIBXML_OUTPUT_ENABLED
/**
* xmlSprintfElementContent:
* @buf: an output buffer
* @content: An element table
* @englob: 1 if one must print the englobing parenthesis, 0 otherwise
*
* Deprecated, unsafe, use xmlSnprintfElementContent
*/
void
xmlSprintfElementContent(char *buf ATTRIBUTE_UNUSED,
xmlElementContentPtr content ATTRIBUTE_UNUSED,
int englob ATTRIBUTE_UNUSED) {
}
#endif /* LIBXML_OUTPUT_ENABLED */