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