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/**
* @file
*
* @brief internal interfaces for XML Path Language implementation
*
* internal interfaces for XML Path Language implementation
* used to build new modules on top of XPath like XPointer and
* XSLT
*
* @copyright See Copyright for the status of this software.
*
* @author Daniel Veillard
*/
#ifndef __XML_XPATH_INTERNALS_H__
#define __XML_XPATH_INTERNALS_H__
#include <stdio.h>
#include <libxml/xmlversion.h>
#include <libxml/xpath.h>
#ifdef LIBXML_XPATH_ENABLED
#ifdef __cplusplus
extern "C" {
#endif
/**
* Push a value on the stack
*
* @deprecated Use #xmlXPathValuePush
*/
#define valuePush xmlXPathValuePush
/**
* Pop a value from the stack
*
* @deprecated Use #xmlXPathValuePop
*/
#define valuePop xmlXPathValuePop
/************************************************************************
* *
* Helpers *
* *
************************************************************************/
/*
* Many of these macros may later turn into functions. They
* shouldn't be used in \#ifdef's preprocessor instructions.
*/
/**
* Raises an error.
*
* @param ctxt an XPath parser context
* @param err an xmlXPathError code
*/
#define xmlXPathSetError(ctxt, err) \
{ xmlXPatherror((ctxt), __FILE__, __LINE__, (err)); \
if ((ctxt) != NULL) (ctxt)->error = (err); }
/**
* Raises an XPATH_INVALID_ARITY error.
*
* @param ctxt an XPath parser context
*/
#define xmlXPathSetArityError(ctxt) \
xmlXPathSetError((ctxt), XPATH_INVALID_ARITY)
/**
* Raises an XPATH_INVALID_TYPE error.
*
* @param ctxt an XPath parser context
*/
#define xmlXPathSetTypeError(ctxt) \
xmlXPathSetError((ctxt), XPATH_INVALID_TYPE)
/**
* Get the error code of an XPath context.
*
* @param ctxt an XPath parser context
* @returns the context error.
*/
#define xmlXPathGetError(ctxt) ((ctxt)->error)
/**
* Check if an XPath error was raised.
*
* @param ctxt an XPath parser context
* @returns true if an error has been raised, false otherwise.
*/
#define xmlXPathCheckError(ctxt) ((ctxt)->error != XPATH_EXPRESSION_OK)
/**
* Get the document of an XPath context.
*
* @param ctxt an XPath parser context
* @returns the context document.
*/
#define xmlXPathGetDocument(ctxt) ((ctxt)->context->doc)
/**
* Get the context node of an XPath context.
*
* @param ctxt an XPath parser context
* @returns the context node.
*/
#define xmlXPathGetContextNode(ctxt) ((ctxt)->context->node)
XMLPUBFUN int
xmlXPathPopBoolean (xmlXPathParserContext *ctxt);
XMLPUBFUN double
xmlXPathPopNumber (xmlXPathParserContext *ctxt);
XMLPUBFUN xmlChar *
xmlXPathPopString (xmlXPathParserContext *ctxt);
XMLPUBFUN xmlNodeSet *
xmlXPathPopNodeSet (xmlXPathParserContext *ctxt);
XMLPUBFUN void *
xmlXPathPopExternal (xmlXPathParserContext *ctxt);
/**
* Pushes the boolean `val` on the context stack.
*
* @param ctxt an XPath parser context
* @param val a boolean
*/
#define xmlXPathReturnBoolean(ctxt, val) \
valuePush((ctxt), xmlXPathNewBoolean(val))
/**
* Pushes true on the context stack.
*
* @param ctxt an XPath parser context
*/
#define xmlXPathReturnTrue(ctxt) xmlXPathReturnBoolean((ctxt), 1)
/**
* Pushes false on the context stack.
*
* @param ctxt an XPath parser context
*/
#define xmlXPathReturnFalse(ctxt) xmlXPathReturnBoolean((ctxt), 0)
/**
* Pushes the double `val` on the context stack.
*
* @param ctxt an XPath parser context
* @param val a double
*/
#define xmlXPathReturnNumber(ctxt, val) \
valuePush((ctxt), xmlXPathNewFloat(val))
/**
* Pushes the string `str` on the context stack.
*
* @param ctxt an XPath parser context
* @param str a string
*/
#define xmlXPathReturnString(ctxt, str) \
valuePush((ctxt), xmlXPathWrapString(str))
/**
* Pushes an empty string on the stack.
*
* @param ctxt an XPath parser context
*/
#define xmlXPathReturnEmptyString(ctxt) \
valuePush((ctxt), xmlXPathNewCString(""))
/**
* Pushes the node-set `ns` on the context stack.
*
* @param ctxt an XPath parser context
* @param ns a node-set
*/
#define xmlXPathReturnNodeSet(ctxt, ns) \
valuePush((ctxt), xmlXPathWrapNodeSet(ns))
/**
* Pushes an empty node-set on the context stack.
*
* @param ctxt an XPath parser context
*/
#define xmlXPathReturnEmptyNodeSet(ctxt) \
valuePush((ctxt), xmlXPathNewNodeSet(NULL))
/**
* Pushes user data on the context stack.
*
* @param ctxt an XPath parser context
* @param val user data
*/
#define xmlXPathReturnExternal(ctxt, val) \
valuePush((ctxt), xmlXPathWrapExternal(val))
/**
* Check if the current value on the XPath stack is a node set or
* an XSLT value tree.
*
* @param ctxt an XPath parser context
* @returns true if the current object on the stack is a node-set.
*/
#define xmlXPathStackIsNodeSet(ctxt) \
(((ctxt)->value != NULL) \
&& (((ctxt)->value->type == XPATH_NODESET) \
|| ((ctxt)->value->type == XPATH_XSLT_TREE)))
/**
* Checks if the current value on the XPath stack is an external
* object.
*
* @param ctxt an XPath parser context
* @returns true if the current object on the stack is an external
* object.
*/
#define xmlXPathStackIsExternal(ctxt) \
((ctxt->value != NULL) && (ctxt->value->type == XPATH_USERS))
/**
* Empties a node-set.
*
* @param ns a node-set
*/
#define xmlXPathEmptyNodeSet(ns) \
{ while ((ns)->nodeNr > 0) (ns)->nodeTab[--(ns)->nodeNr] = NULL; }
/**
* Macro to return from the function if an XPath error was detected.
*/
#define CHECK_ERROR \
if (ctxt->error != XPATH_EXPRESSION_OK) return
/**
* Macro to return 0 from the function if an XPath error was detected.
*/
#define CHECK_ERROR0 \
if (ctxt->error != XPATH_EXPRESSION_OK) return(0)
/**
* Macro to raise an XPath error and return.
*
* @param X the error code
*/
#define XP_ERROR(X) \
{ xmlXPathErr(ctxt, X); return; }
/**
* Macro to raise an XPath error and return 0.
*
* @param X the error code
*/
#define XP_ERROR0(X) \
{ xmlXPathErr(ctxt, X); return(0); }
/**
* Macro to check that the value on top of the XPath stack is of a given
* type.
*
* @param typeval the XPath type
*/
#define CHECK_TYPE(typeval) \
if ((ctxt->value == NULL) || (ctxt->value->type != typeval)) \
XP_ERROR(XPATH_INVALID_TYPE)
/**
* Macro to check that the value on top of the XPath stack is of a given
* type. Return(0) in case of failure
*
* @param typeval the XPath type
*/
#define CHECK_TYPE0(typeval) \
if ((ctxt->value == NULL) || (ctxt->value->type != typeval)) \
XP_ERROR0(XPATH_INVALID_TYPE)
/**
* Macro to check that the number of args passed to an XPath function matches.
*
* @param x the number of expected args
*/
#define CHECK_ARITY(x) \
if (ctxt == NULL) return; \
if (nargs != (x)) \
XP_ERROR(XPATH_INVALID_ARITY); \
if (ctxt->valueNr < (x)) \
XP_ERROR(XPATH_STACK_ERROR);
/**
* Macro to try to cast the value on the top of the XPath stack to a string.
*/
#define CAST_TO_STRING \
if ((ctxt->value != NULL) && (ctxt->value->type != XPATH_STRING)) \
xmlXPathStringFunction(ctxt, 1);
/**
* Macro to try to cast the value on the top of the XPath stack to a number.
*/
#define CAST_TO_NUMBER \
if ((ctxt->value != NULL) && (ctxt->value->type != XPATH_NUMBER)) \
xmlXPathNumberFunction(ctxt, 1);
/**
* Macro to try to cast the value on the top of the XPath stack to a boolean.
*/
#define CAST_TO_BOOLEAN \
if ((ctxt->value != NULL) && (ctxt->value->type != XPATH_BOOLEAN)) \
xmlXPathBooleanFunction(ctxt, 1);
/*
* Variable Lookup forwarding.
*/
XMLPUBFUN void
xmlXPathRegisterVariableLookup (xmlXPathContext *ctxt,
xmlXPathVariableLookupFunc f,
void *data);
/*
* Function Lookup forwarding.
*/
XMLPUBFUN void
xmlXPathRegisterFuncLookup (xmlXPathContext *ctxt,
xmlXPathFuncLookupFunc f,
void *funcCtxt);
/*
* Error reporting.
*/
XMLPUBFUN void
xmlXPatherror (xmlXPathParserContext *ctxt,
const char *file,
int line,
int no);
XMLPUBFUN void
xmlXPathErr (xmlXPathParserContext *ctxt,
int error);
#ifdef LIBXML_DEBUG_ENABLED
XMLPUBFUN void
xmlXPathDebugDumpObject (FILE *output,
xmlXPathObject *cur,
int depth);
XMLPUBFUN void
xmlXPathDebugDumpCompExpr(FILE *output,
xmlXPathCompExpr *comp,
int depth);
#endif
/**
* NodeSet handling.
*/
XMLPUBFUN int
xmlXPathNodeSetContains (xmlNodeSet *cur,
xmlNode *val);
XMLPUBFUN xmlNodeSet *
xmlXPathDifference (xmlNodeSet *nodes1,
xmlNodeSet *nodes2);
XMLPUBFUN xmlNodeSet *
xmlXPathIntersection (xmlNodeSet *nodes1,
xmlNodeSet *nodes2);
XMLPUBFUN xmlNodeSet *
xmlXPathDistinctSorted (xmlNodeSet *nodes);
XMLPUBFUN xmlNodeSet *
xmlXPathDistinct (xmlNodeSet *nodes);
XMLPUBFUN int
xmlXPathHasSameNodes (xmlNodeSet *nodes1,
xmlNodeSet *nodes2);
XMLPUBFUN xmlNodeSet *
xmlXPathNodeLeadingSorted (xmlNodeSet *nodes,
xmlNode *node);
XMLPUBFUN xmlNodeSet *
xmlXPathLeadingSorted (xmlNodeSet *nodes1,
xmlNodeSet *nodes2);
XMLPUBFUN xmlNodeSet *
xmlXPathNodeLeading (xmlNodeSet *nodes,
xmlNode *node);
XMLPUBFUN xmlNodeSet *
xmlXPathLeading (xmlNodeSet *nodes1,
xmlNodeSet *nodes2);
XMLPUBFUN xmlNodeSet *
xmlXPathNodeTrailingSorted (xmlNodeSet *nodes,
xmlNode *node);
XMLPUBFUN xmlNodeSet *
xmlXPathTrailingSorted (xmlNodeSet *nodes1,
xmlNodeSet *nodes2);
XMLPUBFUN xmlNodeSet *
xmlXPathNodeTrailing (xmlNodeSet *nodes,
xmlNode *node);
XMLPUBFUN xmlNodeSet *
xmlXPathTrailing (xmlNodeSet *nodes1,
xmlNodeSet *nodes2);
/**
* Extending a context.
*/
XMLPUBFUN int
xmlXPathRegisterNs (xmlXPathContext *ctxt,
const xmlChar *prefix,
const xmlChar *ns_uri);
XMLPUBFUN const xmlChar *
xmlXPathNsLookup (xmlXPathContext *ctxt,
const xmlChar *prefix);
XMLPUBFUN void
xmlXPathRegisteredNsCleanup (xmlXPathContext *ctxt);
XMLPUBFUN int
xmlXPathRegisterFunc (xmlXPathContext *ctxt,
const xmlChar *name,
xmlXPathFunction f);
XMLPUBFUN int
xmlXPathRegisterFuncNS (xmlXPathContext *ctxt,
const xmlChar *name,
const xmlChar *ns_uri,
xmlXPathFunction f);
XMLPUBFUN int
xmlXPathRegisterVariable (xmlXPathContext *ctxt,
const xmlChar *name,
xmlXPathObject *value);
XMLPUBFUN int
xmlXPathRegisterVariableNS (xmlXPathContext *ctxt,
const xmlChar *name,
const xmlChar *ns_uri,
xmlXPathObject *value);
XMLPUBFUN xmlXPathFunction
xmlXPathFunctionLookup (xmlXPathContext *ctxt,
const xmlChar *name);
XMLPUBFUN xmlXPathFunction
xmlXPathFunctionLookupNS (xmlXPathContext *ctxt,
const xmlChar *name,
const xmlChar *ns_uri);
XMLPUBFUN void
xmlXPathRegisteredFuncsCleanup (xmlXPathContext *ctxt);
XMLPUBFUN xmlXPathObject *
xmlXPathVariableLookup (xmlXPathContext *ctxt,
const xmlChar *name);
XMLPUBFUN xmlXPathObject *
xmlXPathVariableLookupNS (xmlXPathContext *ctxt,
const xmlChar *name,
const xmlChar *ns_uri);
XMLPUBFUN void
xmlXPathRegisteredVariablesCleanup(xmlXPathContext *ctxt);
/**
* Utilities to extend XPath.
*/
XMLPUBFUN xmlXPathParserContext *
xmlXPathNewParserContext (const xmlChar *str,
xmlXPathContext *ctxt);
XMLPUBFUN void
xmlXPathFreeParserContext (xmlXPathParserContext *ctxt);
XMLPUBFUN xmlXPathObject *
xmlXPathValuePop (xmlXPathParserContext *ctxt);
XMLPUBFUN int
xmlXPathValuePush (xmlXPathParserContext *ctxt,
xmlXPathObject *value);
XMLPUBFUN xmlXPathObject *
xmlXPathNewString (const xmlChar *val);
XMLPUBFUN xmlXPathObject *
xmlXPathNewCString (const char *val);
XMLPUBFUN xmlXPathObject *
xmlXPathWrapString (xmlChar *val);
XMLPUBFUN xmlXPathObject *
xmlXPathWrapCString (char * val);
XMLPUBFUN xmlXPathObject *
xmlXPathNewFloat (double val);
XMLPUBFUN xmlXPathObject *
xmlXPathNewBoolean (int val);
XMLPUBFUN xmlXPathObject *
xmlXPathNewNodeSet (xmlNode *val);
XMLPUBFUN xmlXPathObject *
xmlXPathNewValueTree (xmlNode *val);
XMLPUBFUN int
xmlXPathNodeSetAdd (xmlNodeSet *cur,
xmlNode *val);
XMLPUBFUN int
xmlXPathNodeSetAddUnique (xmlNodeSet *cur,
xmlNode *val);
XMLPUBFUN int
xmlXPathNodeSetAddNs (xmlNodeSet *cur,
xmlNode *node,
xmlNs *ns);
XMLPUBFUN void
xmlXPathNodeSetSort (xmlNodeSet *set);
XMLPUBFUN void
xmlXPathRoot (xmlXPathParserContext *ctxt);
XML_DEPRECATED
XMLPUBFUN void
xmlXPathEvalExpr (xmlXPathParserContext *ctxt);
XMLPUBFUN xmlChar *
xmlXPathParseName (xmlXPathParserContext *ctxt);
XMLPUBFUN xmlChar *
xmlXPathParseNCName (xmlXPathParserContext *ctxt);
/*
* Existing functions.
*/
XMLPUBFUN double
xmlXPathStringEvalNumber (const xmlChar *str);
XMLPUBFUN int
xmlXPathEvaluatePredicateResult (xmlXPathParserContext *ctxt,
xmlXPathObject *res);
XMLPUBFUN void
xmlXPathRegisterAllFunctions (xmlXPathContext *ctxt);
XMLPUBFUN xmlNodeSet *
xmlXPathNodeSetMerge (xmlNodeSet *val1,
xmlNodeSet *val2);
XMLPUBFUN void
xmlXPathNodeSetDel (xmlNodeSet *cur,
xmlNode *val);
XMLPUBFUN void
xmlXPathNodeSetRemove (xmlNodeSet *cur,
int val);
XMLPUBFUN xmlXPathObject *
xmlXPathNewNodeSetList (xmlNodeSet *val);
XMLPUBFUN xmlXPathObject *
xmlXPathWrapNodeSet (xmlNodeSet *val);
XMLPUBFUN xmlXPathObject *
xmlXPathWrapExternal (void *val);
XMLPUBFUN int xmlXPathEqualValues(xmlXPathParserContext *ctxt);
XMLPUBFUN int xmlXPathNotEqualValues(xmlXPathParserContext *ctxt);
XMLPUBFUN int xmlXPathCompareValues(xmlXPathParserContext *ctxt, int inf, int strict);
XMLPUBFUN void xmlXPathValueFlipSign(xmlXPathParserContext *ctxt);
XMLPUBFUN void xmlXPathAddValues(xmlXPathParserContext *ctxt);
XMLPUBFUN void xmlXPathSubValues(xmlXPathParserContext *ctxt);
XMLPUBFUN void xmlXPathMultValues(xmlXPathParserContext *ctxt);
XMLPUBFUN void xmlXPathDivValues(xmlXPathParserContext *ctxt);
XMLPUBFUN void xmlXPathModValues(xmlXPathParserContext *ctxt);
XMLPUBFUN int xmlXPathIsNodeType(const xmlChar *name);
/*
* Some of the axis navigation routines.
*/
XMLPUBFUN xmlNode *xmlXPathNextSelf(xmlXPathParserContext *ctxt,
xmlNode *cur);
XMLPUBFUN xmlNode *xmlXPathNextChild(xmlXPathParserContext *ctxt,
xmlNode *cur);
XMLPUBFUN xmlNode *xmlXPathNextDescendant(xmlXPathParserContext *ctxt,
xmlNode *cur);
XMLPUBFUN xmlNode *xmlXPathNextDescendantOrSelf(xmlXPathParserContext *ctxt,
xmlNode *cur);
XMLPUBFUN xmlNode *xmlXPathNextParent(xmlXPathParserContext *ctxt,
xmlNode *cur);
XMLPUBFUN xmlNode *xmlXPathNextAncestorOrSelf(xmlXPathParserContext *ctxt,
xmlNode *cur);
XMLPUBFUN xmlNode *xmlXPathNextFollowingSibling(xmlXPathParserContext *ctxt,
xmlNode *cur);
XMLPUBFUN xmlNode *xmlXPathNextFollowing(xmlXPathParserContext *ctxt,
xmlNode *cur);
XMLPUBFUN xmlNode *xmlXPathNextNamespace(xmlXPathParserContext *ctxt,
xmlNode *cur);
XMLPUBFUN xmlNode *xmlXPathNextAttribute(xmlXPathParserContext *ctxt,
xmlNode *cur);
XMLPUBFUN xmlNode *xmlXPathNextPreceding(xmlXPathParserContext *ctxt,
xmlNode *cur);
XMLPUBFUN xmlNode *xmlXPathNextAncestor(xmlXPathParserContext *ctxt,
xmlNode *cur);
XMLPUBFUN xmlNode *xmlXPathNextPrecedingSibling(xmlXPathParserContext *ctxt,
xmlNode *cur);
/*
* The official core of XPath functions.
*/
XMLPUBFUN void xmlXPathLastFunction(xmlXPathParserContext *ctxt, int nargs);
XMLPUBFUN void xmlXPathPositionFunction(xmlXPathParserContext *ctxt, int nargs);
XMLPUBFUN void xmlXPathCountFunction(xmlXPathParserContext *ctxt, int nargs);
XMLPUBFUN void xmlXPathIdFunction(xmlXPathParserContext *ctxt, int nargs);
XMLPUBFUN void xmlXPathLocalNameFunction(xmlXPathParserContext *ctxt, int nargs);
XMLPUBFUN void xmlXPathNamespaceURIFunction(xmlXPathParserContext *ctxt, int nargs);
XMLPUBFUN void xmlXPathStringFunction(xmlXPathParserContext *ctxt, int nargs);
XMLPUBFUN void xmlXPathStringLengthFunction(xmlXPathParserContext *ctxt, int nargs);
XMLPUBFUN void xmlXPathConcatFunction(xmlXPathParserContext *ctxt, int nargs);
XMLPUBFUN void xmlXPathContainsFunction(xmlXPathParserContext *ctxt, int nargs);
XMLPUBFUN void xmlXPathStartsWithFunction(xmlXPathParserContext *ctxt, int nargs);
XMLPUBFUN void xmlXPathSubstringFunction(xmlXPathParserContext *ctxt, int nargs);
XMLPUBFUN void xmlXPathSubstringBeforeFunction(xmlXPathParserContext *ctxt, int nargs);
XMLPUBFUN void xmlXPathSubstringAfterFunction(xmlXPathParserContext *ctxt, int nargs);
XMLPUBFUN void xmlXPathNormalizeFunction(xmlXPathParserContext *ctxt, int nargs);
XMLPUBFUN void xmlXPathTranslateFunction(xmlXPathParserContext *ctxt, int nargs);
XMLPUBFUN void xmlXPathNotFunction(xmlXPathParserContext *ctxt, int nargs);
XMLPUBFUN void xmlXPathTrueFunction(xmlXPathParserContext *ctxt, int nargs);
XMLPUBFUN void xmlXPathFalseFunction(xmlXPathParserContext *ctxt, int nargs);
XMLPUBFUN void xmlXPathLangFunction(xmlXPathParserContext *ctxt, int nargs);
XMLPUBFUN void xmlXPathNumberFunction(xmlXPathParserContext *ctxt, int nargs);
XMLPUBFUN void xmlXPathSumFunction(xmlXPathParserContext *ctxt, int nargs);
XMLPUBFUN void xmlXPathFloorFunction(xmlXPathParserContext *ctxt, int nargs);
XMLPUBFUN void xmlXPathCeilingFunction(xmlXPathParserContext *ctxt, int nargs);
XMLPUBFUN void xmlXPathRoundFunction(xmlXPathParserContext *ctxt, int nargs);
XMLPUBFUN void xmlXPathBooleanFunction(xmlXPathParserContext *ctxt, int nargs);
/**
* Really internal functions
*/
XMLPUBFUN void xmlXPathNodeSetFreeNs(xmlNs *ns);
#ifdef __cplusplus
}
#endif
#endif /* LIBXML_XPATH_ENABLED */
#endif /* ! __XML_XPATH_INTERNALS_H__ */