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xpathInternals.h
/* * 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 <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 XMLCALL xmlXPathPopBoolean (xmlXPathParserContextPtr ctxt); XMLPUBFUN double XMLCALL xmlXPathPopNumber (xmlXPathParserContextPtr ctxt); XMLPUBFUN xmlChar * XMLCALL xmlXPathPopString (xmlXPathParserContextPtr ctxt); XMLPUBFUN xmlNodeSetPtr XMLCALL xmlXPathPopNodeSet (xmlXPathParserContextPtr ctxt); XMLPUBFUN void * XMLCALL 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 < ctxt->valueFrame + (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 XMLCALL xmlXPathRegisterVariableLookup (xmlXPathContextPtr ctxt, xmlXPathVariableLookupFunc f, void *data); /* * Function Lookup forwarding. */ XMLPUBFUN void XMLCALL xmlXPathRegisterFuncLookup (xmlXPathContextPtr ctxt, xmlXPathFuncLookupFunc f, void *funcCtxt); /* * Error reporting. */ XMLPUBFUN void XMLCALL xmlXPatherror (xmlXPathParserContextPtr ctxt, const char *file, int line, int no); XMLPUBFUN void XMLCALL xmlXPathErr (xmlXPathParserContextPtr ctxt, int error); #ifdef LIBXML_DEBUG_ENABLED XMLPUBFUN void XMLCALL xmlXPathDebugDumpObject (FILE *output, xmlXPathObjectPtr cur, int depth); XMLPUBFUN void XMLCALL xmlXPathDebugDumpCompExpr(FILE *output, xmlXPathCompExprPtr comp, int depth); #endif /** * NodeSet handling. */ XMLPUBFUN int XMLCALL xmlXPathNodeSetContains (xmlNodeSetPtr cur, xmlNodePtr val); XMLPUBFUN xmlNodeSetPtr XMLCALL xmlXPathDifference (xmlNodeSetPtr nodes1, xmlNodeSetPtr nodes2); XMLPUBFUN xmlNodeSetPtr XMLCALL xmlXPathIntersection (xmlNodeSetPtr nodes1, xmlNodeSetPtr nodes2); XMLPUBFUN xmlNodeSetPtr XMLCALL xmlXPathDistinctSorted (xmlNodeSetPtr nodes); XMLPUBFUN xmlNodeSetPtr XMLCALL xmlXPathDistinct (xmlNodeSetPtr nodes); XMLPUBFUN int XMLCALL xmlXPathHasSameNodes (xmlNodeSetPtr nodes1, xmlNodeSetPtr nodes2); XMLPUBFUN xmlNodeSetPtr XMLCALL xmlXPathNodeLeadingSorted (xmlNodeSetPtr nodes, xmlNodePtr node); XMLPUBFUN xmlNodeSetPtr XMLCALL xmlXPathLeadingSorted (xmlNodeSetPtr nodes1, xmlNodeSetPtr nodes2); XMLPUBFUN xmlNodeSetPtr XMLCALL xmlXPathNodeLeading (xmlNodeSetPtr nodes, xmlNodePtr node); XMLPUBFUN xmlNodeSetPtr XMLCALL xmlXPathLeading (xmlNodeSetPtr nodes1, xmlNodeSetPtr nodes2); XMLPUBFUN xmlNodeSetPtr XMLCALL xmlXPathNodeTrailingSorted (xmlNodeSetPtr nodes, xmlNodePtr node); XMLPUBFUN xmlNodeSetPtr XMLCALL xmlXPathTrailingSorted (xmlNodeSetPtr nodes1, xmlNodeSetPtr nodes2); XMLPUBFUN xmlNodeSetPtr XMLCALL xmlXPathNodeTrailing (xmlNodeSetPtr nodes, xmlNodePtr node); XMLPUBFUN xmlNodeSetPtr XMLCALL xmlXPathTrailing (xmlNodeSetPtr nodes1, xmlNodeSetPtr nodes2); /** * Extending a context. */ XMLPUBFUN int XMLCALL xmlXPathRegisterNs (xmlXPathContextPtr ctxt, const xmlChar *prefix, const xmlChar *ns_uri); XMLPUBFUN const xmlChar * XMLCALL xmlXPathNsLookup (xmlXPathContextPtr ctxt, const xmlChar *prefix); XMLPUBFUN void XMLCALL xmlXPathRegisteredNsCleanup (xmlXPathContextPtr ctxt); XMLPUBFUN int XMLCALL xmlXPathRegisterFunc (xmlXPathContextPtr ctxt, const xmlChar *name, xmlXPathFunction f); XMLPUBFUN int XMLCALL xmlXPathRegisterFuncNS (xmlXPathContextPtr ctxt, const xmlChar *name, const xmlChar *ns_uri, xmlXPathFunction f); XMLPUBFUN int XMLCALL xmlXPathRegisterVariable (xmlXPathContextPtr ctxt, const xmlChar *name, xmlXPathObjectPtr value); XMLPUBFUN int XMLCALL xmlXPathRegisterVariableNS (xmlXPathContextPtr ctxt, const xmlChar *name, const xmlChar *ns_uri, xmlXPathObjectPtr value); XMLPUBFUN xmlXPathFunction XMLCALL xmlXPathFunctionLookup (xmlXPathContextPtr ctxt, const xmlChar *name); XMLPUBFUN xmlXPathFunction XMLCALL xmlXPathFunctionLookupNS (xmlXPathContextPtr ctxt, const xmlChar *name, const xmlChar *ns_uri); XMLPUBFUN void XMLCALL xmlXPathRegisteredFuncsCleanup (xmlXPathContextPtr ctxt); XMLPUBFUN xmlXPathObjectPtr XMLCALL xmlXPathVariableLookup (xmlXPathContextPtr ctxt, const xmlChar *name); XMLPUBFUN xmlXPathObjectPtr XMLCALL xmlXPathVariableLookupNS (xmlXPathContextPtr ctxt, const xmlChar *name, const xmlChar *ns_uri); XMLPUBFUN void XMLCALL xmlXPathRegisteredVariablesCleanup(xmlXPathContextPtr ctxt); /** * Utilities to extend XPath. */ XMLPUBFUN xmlXPathParserContextPtr XMLCALL xmlXPathNewParserContext (const xmlChar *str, xmlXPathContextPtr ctxt); XMLPUBFUN void XMLCALL xmlXPathFreeParserContext (xmlXPathParserContextPtr ctxt); /* TODO: remap to xmlXPathValuePop and Push. */ XMLPUBFUN xmlXPathObjectPtr XMLCALL valuePop (xmlXPathParserContextPtr ctxt); XMLPUBFUN int XMLCALL valuePush (xmlXPathParserContextPtr ctxt, xmlXPathObjectPtr value); XMLPUBFUN xmlXPathObjectPtr XMLCALL xmlXPathNewString (const xmlChar *val); XMLPUBFUN xmlXPathObjectPtr XMLCALL xmlXPathNewCString (const char *val); XMLPUBFUN xmlXPathObjectPtr XMLCALL xmlXPathWrapString (xmlChar *val); XMLPUBFUN xmlXPathObjectPtr XMLCALL xmlXPathWrapCString (char * val); XMLPUBFUN xmlXPathObjectPtr XMLCALL xmlXPathNewFloat (double val); XMLPUBFUN xmlXPathObjectPtr XMLCALL xmlXPathNewBoolean (int val); XMLPUBFUN xmlXPathObjectPtr XMLCALL xmlXPathNewNodeSet (xmlNodePtr val); XMLPUBFUN xmlXPathObjectPtr XMLCALL xmlXPathNewValueTree (xmlNodePtr val); XMLPUBFUN int XMLCALL xmlXPathNodeSetAdd (xmlNodeSetPtr cur, xmlNodePtr val); XMLPUBFUN int XMLCALL xmlXPathNodeSetAddUnique (xmlNodeSetPtr cur, xmlNodePtr val); XMLPUBFUN int XMLCALL xmlXPathNodeSetAddNs (xmlNodeSetPtr cur, xmlNodePtr node, xmlNsPtr ns); XMLPUBFUN void XMLCALL xmlXPathNodeSetSort (xmlNodeSetPtr set); XMLPUBFUN void XMLCALL xmlXPathRoot (xmlXPathParserContextPtr ctxt); XMLPUBFUN void XMLCALL xmlXPathEvalExpr (xmlXPathParserContextPtr ctxt); XMLPUBFUN xmlChar * XMLCALL xmlXPathParseName (xmlXPathParserContextPtr ctxt); XMLPUBFUN xmlChar * XMLCALL xmlXPathParseNCName (xmlXPathParserContextPtr ctxt); /* * Existing functions. */ XMLPUBFUN double XMLCALL xmlXPathStringEvalNumber (const xmlChar *str); XMLPUBFUN int XMLCALL xmlXPathEvaluatePredicateResult (xmlXPathParserContextPtr ctxt, xmlXPathObjectPtr res); XMLPUBFUN void XMLCALL xmlXPathRegisterAllFunctions (xmlXPathContextPtr ctxt); XMLPUBFUN xmlNodeSetPtr XMLCALL xmlXPathNodeSetMerge (xmlNodeSetPtr val1, xmlNodeSetPtr val2); XMLPUBFUN void XMLCALL xmlXPathNodeSetDel (xmlNodeSetPtr cur, xmlNodePtr val); XMLPUBFUN void XMLCALL xmlXPathNodeSetRemove (xmlNodeSetPtr cur, int val); XMLPUBFUN xmlXPathObjectPtr XMLCALL xmlXPathNewNodeSetList (xmlNodeSetPtr val); XMLPUBFUN xmlXPathObjectPtr XMLCALL xmlXPathWrapNodeSet (xmlNodeSetPtr val); XMLPUBFUN xmlXPathObjectPtr XMLCALL xmlXPathWrapExternal (void *val); XMLPUBFUN int XMLCALL xmlXPathEqualValues(xmlXPathParserContextPtr ctxt); XMLPUBFUN int XMLCALL xmlXPathNotEqualValues(xmlXPathParserContextPtr ctxt); XMLPUBFUN int XMLCALL xmlXPathCompareValues(xmlXPathParserContextPtr ctxt, int inf, int strict); XMLPUBFUN void XMLCALL xmlXPathValueFlipSign(xmlXPathParserContextPtr ctxt); XMLPUBFUN void XMLCALL xmlXPathAddValues(xmlXPathParserContextPtr ctxt); XMLPUBFUN void XMLCALL xmlXPathSubValues(xmlXPathParserContextPtr ctxt); XMLPUBFUN void XMLCALL xmlXPathMultValues(xmlXPathParserContextPtr ctxt); XMLPUBFUN void XMLCALL xmlXPathDivValues(xmlXPathParserContextPtr ctxt); XMLPUBFUN void XMLCALL xmlXPathModValues(xmlXPathParserContextPtr ctxt); XMLPUBFUN int XMLCALL xmlXPathIsNodeType(const xmlChar *name); /* * Some of the axis navigation routines. */ XMLPUBFUN xmlNodePtr XMLCALL xmlXPathNextSelf(xmlXPathParserContextPtr ctxt, xmlNodePtr cur); XMLPUBFUN xmlNodePtr XMLCALL xmlXPathNextChild(xmlXPathParserContextPtr ctxt, xmlNodePtr cur); XMLPUBFUN xmlNodePtr XMLCALL xmlXPathNextDescendant(xmlXPathParserContextPtr ctxt, xmlNodePtr cur); XMLPUBFUN xmlNodePtr XMLCALL xmlXPathNextDescendantOrSelf(xmlXPathParserContextPtr ctxt, xmlNodePtr cur); XMLPUBFUN xmlNodePtr XMLCALL xmlXPathNextParent(xmlXPathParserContextPtr ctxt, xmlNodePtr cur); XMLPUBFUN xmlNodePtr XMLCALL xmlXPathNextAncestorOrSelf(xmlXPathParserContextPtr ctxt, xmlNodePtr cur); XMLPUBFUN xmlNodePtr XMLCALL xmlXPathNextFollowingSibling(xmlXPathParserContextPtr ctxt, xmlNodePtr cur); XMLPUBFUN xmlNodePtr XMLCALL xmlXPathNextFollowing(xmlXPathParserContextPtr ctxt, xmlNodePtr cur); XMLPUBFUN xmlNodePtr XMLCALL xmlXPathNextNamespace(xmlXPathParserContextPtr ctxt, xmlNodePtr cur); XMLPUBFUN xmlNodePtr XMLCALL xmlXPathNextAttribute(xmlXPathParserContextPtr ctxt, xmlNodePtr cur); XMLPUBFUN xmlNodePtr XMLCALL xmlXPathNextPreceding(xmlXPathParserContextPtr ctxt, xmlNodePtr cur); XMLPUBFUN xmlNodePtr XMLCALL xmlXPathNextAncestor(xmlXPathParserContextPtr ctxt, xmlNodePtr cur); XMLPUBFUN xmlNodePtr XMLCALL xmlXPathNextPrecedingSibling(xmlXPathParserContextPtr ctxt, xmlNodePtr cur); /* * The official core of XPath functions. */ XMLPUBFUN void XMLCALL xmlXPathLastFunction(xmlXPathParserContextPtr ctxt, int nargs); XMLPUBFUN void XMLCALL xmlXPathPositionFunction(xmlXPathParserContextPtr ctxt, int nargs); XMLPUBFUN void XMLCALL xmlXPathCountFunction(xmlXPathParserContextPtr ctxt, int nargs); XMLPUBFUN void XMLCALL xmlXPathIdFunction(xmlXPathParserContextPtr ctxt, int nargs); XMLPUBFUN void XMLCALL xmlXPathLocalNameFunction(xmlXPathParserContextPtr ctxt, int nargs); XMLPUBFUN void XMLCALL xmlXPathNamespaceURIFunction(xmlXPathParserContextPtr ctxt, int nargs); XMLPUBFUN void XMLCALL xmlXPathStringFunction(xmlXPathParserContextPtr ctxt, int nargs); XMLPUBFUN void XMLCALL xmlXPathStringLengthFunction(xmlXPathParserContextPtr ctxt, int nargs); XMLPUBFUN void XMLCALL xmlXPathConcatFunction(xmlXPathParserContextPtr ctxt, int nargs); XMLPUBFUN void XMLCALL xmlXPathContainsFunction(xmlXPathParserContextPtr ctxt, int nargs); XMLPUBFUN void XMLCALL xmlXPathStartsWithFunction(xmlXPathParserContextPtr ctxt, int nargs); XMLPUBFUN void XMLCALL xmlXPathSubstringFunction(xmlXPathParserContextPtr ctxt, int nargs); XMLPUBFUN void XMLCALL xmlXPathSubstringBeforeFunction(xmlXPathParserContextPtr ctxt, int nargs); XMLPUBFUN void XMLCALL xmlXPathSubstringAfterFunction(xmlXPathParserContextPtr ctxt, int nargs); XMLPUBFUN void XMLCALL xmlXPathNormalizeFunction(xmlXPathParserContextPtr ctxt, int nargs); XMLPUBFUN void XMLCALL xmlXPathTranslateFunction(xmlXPathParserContextPtr ctxt, int nargs); XMLPUBFUN void XMLCALL xmlXPathNotFunction(xmlXPathParserContextPtr ctxt, int nargs); XMLPUBFUN void XMLCALL xmlXPathTrueFunction(xmlXPathParserContextPtr ctxt, int nargs); XMLPUBFUN void XMLCALL xmlXPathFalseFunction(xmlXPathParserContextPtr ctxt, int nargs); XMLPUBFUN void XMLCALL xmlXPathLangFunction(xmlXPathParserContextPtr ctxt, int nargs); XMLPUBFUN void XMLCALL xmlXPathNumberFunction(xmlXPathParserContextPtr ctxt, int nargs); XMLPUBFUN void XMLCALL xmlXPathSumFunction(xmlXPathParserContextPtr ctxt, int nargs); XMLPUBFUN void XMLCALL xmlXPathFloorFunction(xmlXPathParserContextPtr ctxt, int nargs); XMLPUBFUN void XMLCALL xmlXPathCeilingFunction(xmlXPathParserContextPtr ctxt, int nargs); XMLPUBFUN void XMLCALL xmlXPathRoundFunction(xmlXPathParserContextPtr ctxt, int nargs); XMLPUBFUN void XMLCALL xmlXPathBooleanFunction(xmlXPathParserContextPtr ctxt, int nargs); /** * Really internal functions */ XMLPUBFUN void XMLCALL xmlXPathNodeSetFreeNs(xmlNsPtr ns); #ifdef __cplusplus } #endif #endif /* LIBXML_XPATH_ENABLED */ #endif /* ! __XML_XPATH_INTERNALS_H__ */
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