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Edit File : xpathInternals.h \| Size : 17.99 KB
/* * 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__ */ Back

Edit File : xpathInternals.h | Size : 17.99 KB

/*
 * 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__ */

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