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