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cbaf399537
* *.c include/libxml/*.h doc/html/*: applied 42 documentation patches from Charlie Bozeman. Regenerated the HTML docs. Daniel
579 lines
18 KiB
C
579 lines
18 KiB
C
/*
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* xpathInternals.c: internal interfaces for XML Path Language implementation
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* used to build new modules on top of XPath
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*
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* See COPYRIGHT for the status of this software
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*
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* Author: daniel@veillard.com
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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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#if defined(WIN32) && defined(_MSC_VER)
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#include <libxml/xmlwin32version.h>
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#else
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#include <libxml/xmlversion.h>
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#endif
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#include <libxml/xpath.h>
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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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* *
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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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* xmlXPathSetError:
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* @ctxt: an XPath parser context
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* @err: an xmlXPathError code
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*
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* Raises an error.
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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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(ctxt)->error = (err); }
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/**
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* xmlXPathSetArityError:
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* @ctxt: an XPath parser context
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*
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* Raises an XPATH_INVALID_ARITY error
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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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* xmlXPathSetTypeError:
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* @ctxt: an XPath parser context
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*
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* Raises an XPATH_INVALID_TYPE error
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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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* xmlXPathGetError:
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* @ctxt: an XPath parser context
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*
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* Get the error code of an XPath context
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*
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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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* xmlXPathCheckError:
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* @ctxt: an XPath parser context
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*
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* Check if an XPath error was raised
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*
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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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* xmlXPathGetDocument:
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* @ctxt: an XPath parser context
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*
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* Get the document of an XPath context
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*
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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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* xmlXPathGetContextNode:
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* @ctxt: an XPath parser context
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*
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* Get the context node of an XPath context
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*
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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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int xmlXPathPopBoolean (xmlXPathParserContextPtr ctxt);
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double xmlXPathPopNumber (xmlXPathParserContextPtr ctxt);
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xmlChar * xmlXPathPopString (xmlXPathParserContextPtr ctxt);
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xmlNodeSetPtr xmlXPathPopNodeSet (xmlXPathParserContextPtr ctxt);
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void * xmlXPathPopExternal (xmlXPathParserContextPtr ctxt);
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/**
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* xmlXPathReturnBoolean:
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* @ctxt: an XPath parser context
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* @val: a boolean
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*
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* Pushes the boolean @val on the context stack
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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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* xmlXPathReturnTrue:
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* @ctxt: an XPath parser context
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*
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* Pushes true on the context stack
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*/
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#define xmlXPathReturnTrue(ctxt) xmlXPathReturnBoolean((ctxt), 1)
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/**
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* xmlXPathReturnFalse:
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* @ctxt: an XPath parser context
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*
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* Pushes false on the context stack
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*/
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#define xmlXPathReturnFalse(ctxt) xmlXPathReturnBoolean((ctxt), 0)
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/**
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* xmlXPathReturnNumber:
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* @ctxt: an XPath parser context
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* @val: a double
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*
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* Pushes the double @val on the context stack
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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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* xmlXPathReturnString:
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* @ctxt: an XPath parser context
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* @str: a string
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*
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* Pushes the string @str on the context stack
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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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* xmlXPathReturnEmptyString:
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* @ctxt: an XPath parser context
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*
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* Pushes an empty string on the stack
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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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* xmlXPathReturnNodeSet:
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* @ctxt: an XPath parser context
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* @ns: a node-set
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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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#define xmlXPathReturnNodeSet(ctxt, ns) \
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valuePush((ctxt), xmlXPathWrapNodeSet(ns))
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/**
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* xmlXPathReturnEmptyNodeSet:
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* @ctxt: an XPath parser context
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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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#define xmlXPathReturnEmptyNodeSet(ctxt, ns) \
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valuePush((ctxt), xmlXPathNewNodeSet(NULL))
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/**
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* xmlXPathReturnExternal:
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* @ctxt: an XPath parser context
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* @val: user data
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*
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* Pushes user data on the context stack
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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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* xmlXPathStackIsNodeSet:
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* @ctxt: an XPath parser context
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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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* 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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* xmlXPathStackIsExternal:
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* @ctxt: an XPath parser context
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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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* 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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* xmlXPathEmptyNodeSet:
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* @ns: a node-set
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*
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* Empties 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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* CHECK_ERROR:
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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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* CHECK_ERROR0:
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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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* XP_ERROR:
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* @X: the error code
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*
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* Macro to raise an XPath error and return
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*/
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#define XP_ERROR(X) \
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{ xmlXPatherror(ctxt, __FILE__, __LINE__, X); \
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ctxt->error = (X); return; }
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/**
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* XP_ERROR0:
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* @X: the error code
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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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#define XP_ERROR0(X) \
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{ xmlXPatherror(ctxt, __FILE__, __LINE__, X); \
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ctxt->error = (X); return(0); }
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/**
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* CHECK_TYPE:
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* @typeval: the XPath 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.
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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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* CHECK_TYPE0:
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* @typeval: the XPath 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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#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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* CHECK_ARITY:
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* @x: the number of expected args
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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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#define CHECK_ARITY(x) \
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if (nargs != (x)) \
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XP_ERROR(XPATH_INVALID_ARITY);
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/**
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* CAST_TO_STRING:
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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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* CAST_TO_NUMBER:
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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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* CAST_TO_BOOLEAN:
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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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typedef xmlXPathObjectPtr (*xmlXPathVariableLookupFunc) (void *ctxt,
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const xmlChar *name,
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const xmlChar *ns_uri);
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void xmlXPathRegisterVariableLookup (xmlXPathContextPtr 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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typedef xmlXPathFunction
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(*xmlXPathFuncLookupFunc) (void *ctxt,
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const xmlChar *name,
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const xmlChar *ns_uri);
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void xmlXPathRegisterFuncLookup (xmlXPathContextPtr 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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void xmlXPatherror (xmlXPathParserContextPtr ctxt,
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const char *file,
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int line,
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int no);
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void xmlXPathDebugDumpObject (FILE *output,
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xmlXPathObjectPtr cur,
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int depth);
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void xmlXPathDebugDumpCompExpr(FILE *output,
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xmlXPathCompExprPtr comp,
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int depth);
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/**
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* NodeSet handling
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*/
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int xmlXPathNodeSetContains (xmlNodeSetPtr cur,
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xmlNodePtr val);
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xmlNodeSetPtr xmlXPathDifference (xmlNodeSetPtr nodes1,
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xmlNodeSetPtr nodes2);
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xmlNodeSetPtr xmlXPathIntersection (xmlNodeSetPtr nodes1,
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xmlNodeSetPtr nodes2);
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xmlNodeSetPtr xmlXPathDistinctSorted (xmlNodeSetPtr nodes);
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xmlNodeSetPtr xmlXPathDistinct (xmlNodeSetPtr nodes);
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int xmlXPathHasSameNodes (xmlNodeSetPtr nodes1,
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xmlNodeSetPtr nodes2);
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xmlNodeSetPtr xmlXPathNodeLeadingSorted (xmlNodeSetPtr nodes,
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xmlNodePtr node);
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xmlNodeSetPtr xmlXPathLeadingSorted (xmlNodeSetPtr nodes1,
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xmlNodeSetPtr nodes2);
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xmlNodeSetPtr xmlXPathNodeLeading (xmlNodeSetPtr nodes,
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xmlNodePtr node);
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xmlNodeSetPtr xmlXPathLeading (xmlNodeSetPtr nodes1,
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xmlNodeSetPtr nodes2);
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xmlNodeSetPtr xmlXPathNodeTrailingSorted (xmlNodeSetPtr nodes,
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xmlNodePtr node);
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xmlNodeSetPtr xmlXPathTrailingSorted (xmlNodeSetPtr nodes1,
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xmlNodeSetPtr nodes2);
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xmlNodeSetPtr xmlXPathNodeTrailing (xmlNodeSetPtr nodes,
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xmlNodePtr node);
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xmlNodeSetPtr xmlXPathTrailing (xmlNodeSetPtr nodes1,
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xmlNodeSetPtr nodes2);
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/**
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* Extending a context
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*/
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int xmlXPathRegisterNs (xmlXPathContextPtr ctxt,
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const xmlChar *prefix,
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const xmlChar *ns_uri);
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const xmlChar * xmlXPathNsLookup (xmlXPathContextPtr ctxt,
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const xmlChar *prefix);
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void xmlXPathRegisteredNsCleanup (xmlXPathContextPtr ctxt);
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int xmlXPathRegisterFunc (xmlXPathContextPtr ctxt,
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const xmlChar *name,
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xmlXPathFunction f);
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int xmlXPathRegisterFuncNS (xmlXPathContextPtr 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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int xmlXPathRegisterVariable (xmlXPathContextPtr ctxt,
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const xmlChar *name,
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xmlXPathObjectPtr value);
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int xmlXPathRegisterVariableNS (xmlXPathContextPtr ctxt,
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const xmlChar *name,
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const xmlChar *ns_uri,
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xmlXPathObjectPtr value);
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xmlXPathFunction xmlXPathFunctionLookup (xmlXPathContextPtr ctxt,
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const xmlChar *name);
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xmlXPathFunction xmlXPathFunctionLookupNS (xmlXPathContextPtr ctxt,
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const xmlChar *name,
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const xmlChar *ns_uri);
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void xmlXPathRegisteredFuncsCleanup(xmlXPathContextPtr ctxt);
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xmlXPathObjectPtr xmlXPathVariableLookup (xmlXPathContextPtr ctxt,
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const xmlChar *name);
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xmlXPathObjectPtr xmlXPathVariableLookupNS (xmlXPathContextPtr ctxt,
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const xmlChar *name,
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const xmlChar *ns_uri);
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void xmlXPathRegisteredVariablesCleanup(xmlXPathContextPtr ctxt);
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/**
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* Utilities to extend XPath
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*/
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xmlXPathParserContextPtr
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xmlXPathNewParserContext (const xmlChar *str,
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xmlXPathContextPtr ctxt);
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void xmlXPathFreeParserContext (xmlXPathParserContextPtr ctxt);
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/* TODO: remap to xmlXPathValuePop and Push */
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xmlXPathObjectPtr valuePop (xmlXPathParserContextPtr ctxt);
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int valuePush (xmlXPathParserContextPtr ctxt,
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xmlXPathObjectPtr value);
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xmlXPathObjectPtr xmlXPathNewString (const xmlChar *val);
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xmlXPathObjectPtr xmlXPathNewCString (const char *val);
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xmlXPathObjectPtr xmlXPathWrapString (xmlChar *val);
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xmlXPathObjectPtr xmlXPathWrapCString (char *val);
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xmlXPathObjectPtr xmlXPathNewFloat (double val);
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xmlXPathObjectPtr xmlXPathNewBoolean (int val);
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xmlXPathObjectPtr xmlXPathNewNodeSet (xmlNodePtr val);
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xmlXPathObjectPtr xmlXPathNewValueTree (xmlNodePtr val);
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void xmlXPathNodeSetAdd (xmlNodeSetPtr cur,
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xmlNodePtr val);
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void xmlXPathNodeSetAddUnique (xmlNodeSetPtr cur,
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xmlNodePtr val);
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void xmlXPathNodeSetSort (xmlNodeSetPtr set);
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void xmlXPathIdFunction (xmlXPathParserContextPtr ctxt,
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int nargs);
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void xmlXPathRoot (xmlXPathParserContextPtr ctxt);
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void xmlXPathEvalExpr (xmlXPathParserContextPtr ctxt);
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xmlChar * xmlXPathParseName (xmlXPathParserContextPtr ctxt);
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xmlChar * xmlXPathParseNCName (xmlXPathParserContextPtr ctxt);
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/*
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* Debug
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*/
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#ifdef LIBXML_DEBUG_ENABLED
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void xmlXPathDebugDumpObject(FILE *output, xmlXPathObjectPtr cur, int depth);
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#endif
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/*
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* Existing functions
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*/
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double xmlXPathStringEvalNumber(const xmlChar *str);
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int xmlXPathEvaluatePredicateResult(xmlXPathParserContextPtr ctxt,
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xmlXPathObjectPtr res);
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void xmlXPathInit(void);
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void xmlXPathStringFunction(xmlXPathParserContextPtr ctxt, int nargs);
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void xmlXPathRegisterAllFunctions(xmlXPathContextPtr ctxt);
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xmlNodeSetPtr xmlXPathNodeSetCreate(xmlNodePtr val);
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void xmlXPathNodeSetAdd(xmlNodeSetPtr cur, xmlNodePtr val);
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xmlNodeSetPtr xmlXPathNodeSetMerge(xmlNodeSetPtr val1, xmlNodeSetPtr val2);
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void xmlXPathNodeSetDel(xmlNodeSetPtr cur, xmlNodePtr val);
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void xmlXPathNodeSetRemove(xmlNodeSetPtr cur, int val);
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void xmlXPathFreeNodeSet(xmlNodeSetPtr obj);
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xmlXPathObjectPtr xmlXPathNewNodeSet(xmlNodePtr val);
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xmlXPathObjectPtr xmlXPathNewNodeSetList(xmlNodeSetPtr val);
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xmlXPathObjectPtr xmlXPathWrapNodeSet(xmlNodeSetPtr val);
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xmlXPathObjectPtr xmlXPathWrapExternal(void *val);
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void xmlXPathFreeNodeSetList(xmlXPathObjectPtr obj);
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xmlXPathObjectPtr xmlXPathNewFloat(double val);
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xmlXPathObjectPtr xmlXPathNewBoolean(int val);
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xmlXPathObjectPtr xmlXPathNewString(const xmlChar *val);
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xmlXPathObjectPtr xmlXPathNewCString(const char *val);
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void xmlXPathFreeObject(xmlXPathObjectPtr obj);
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xmlXPathContextPtr xmlXPathNewContext(xmlDocPtr doc);
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void xmlXPathFreeContext(xmlXPathContextPtr ctxt);
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int xmlXPathEqualValues(xmlXPathParserContextPtr ctxt);
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int xmlXPathCompareValues(xmlXPathParserContextPtr ctxt, int inf, int strict);
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void xmlXPathValueFlipSign(xmlXPathParserContextPtr ctxt);
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void xmlXPathAddValues(xmlXPathParserContextPtr ctxt);
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void xmlXPathSubValues(xmlXPathParserContextPtr ctxt);
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void xmlXPathMultValues(xmlXPathParserContextPtr ctxt);
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void xmlXPathDivValues(xmlXPathParserContextPtr ctxt);
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void xmlXPathModValues(xmlXPathParserContextPtr ctxt);
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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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xmlNodePtr xmlXPathNextSelf(xmlXPathParserContextPtr ctxt,
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xmlNodePtr cur);
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xmlNodePtr xmlXPathNextChild(xmlXPathParserContextPtr ctxt,
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xmlNodePtr cur);
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xmlNodePtr xmlXPathNextDescendant(xmlXPathParserContextPtr ctxt,
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xmlNodePtr cur);
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xmlNodePtr xmlXPathNextDescendantOrSelf(xmlXPathParserContextPtr ctxt,
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xmlNodePtr cur);
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xmlNodePtr xmlXPathNextParent(xmlXPathParserContextPtr ctxt,
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xmlNodePtr cur);
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xmlNodePtr xmlXPathNextAncestorOrSelf(xmlXPathParserContextPtr ctxt,
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xmlNodePtr cur);
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xmlNodePtr xmlXPathNextFollowingSibling(xmlXPathParserContextPtr ctxt,
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xmlNodePtr cur);
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xmlNodePtr xmlXPathNextFollowing(xmlXPathParserContextPtr ctxt,
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xmlNodePtr cur);
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xmlNodePtr xmlXPathNextNamespace(xmlXPathParserContextPtr ctxt,
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xmlNodePtr cur);
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xmlNodePtr xmlXPathNextAttribute(xmlXPathParserContextPtr ctxt,
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xmlNodePtr cur);
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xmlNodePtr xmlXPathNextPreceding(xmlXPathParserContextPtr ctxt,
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xmlNodePtr cur);
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xmlNodePtr xmlXPathNextAncestor(xmlXPathParserContextPtr ctxt,
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xmlNodePtr cur);
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xmlNodePtr xmlXPathNextPrecedingSibling(xmlXPathParserContextPtr ctxt,
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xmlNodePtr cur);
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/*
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* The official core of XPath functions
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*/
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void xmlXPathRoot(xmlXPathParserContextPtr ctxt);
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void xmlXPathLastFunction(xmlXPathParserContextPtr ctxt, int nargs);
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void xmlXPathPositionFunction(xmlXPathParserContextPtr ctxt, int nargs);
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void xmlXPathCountFunction(xmlXPathParserContextPtr ctxt, int nargs);
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void xmlXPathIdFunction(xmlXPathParserContextPtr ctxt, int nargs);
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void xmlXPathLocalNameFunction(xmlXPathParserContextPtr ctxt, int nargs);
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void xmlXPathNamespaceURIFunction(xmlXPathParserContextPtr ctxt, int nargs);
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void xmlXPathStringFunction(xmlXPathParserContextPtr ctxt, int nargs);
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void xmlXPathStringLengthFunction(xmlXPathParserContextPtr ctxt, int nargs);
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void xmlXPathConcatFunction(xmlXPathParserContextPtr ctxt, int nargs);
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void xmlXPathContainsFunction(xmlXPathParserContextPtr ctxt, int nargs);
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void xmlXPathStartsWithFunction(xmlXPathParserContextPtr ctxt, int nargs);
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void xmlXPathSubstringFunction(xmlXPathParserContextPtr ctxt, int nargs);
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void xmlXPathSubstringBeforeFunction(xmlXPathParserContextPtr ctxt, int nargs);
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void xmlXPathSubstringAfterFunction(xmlXPathParserContextPtr ctxt, int nargs);
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void xmlXPathNormalizeFunction(xmlXPathParserContextPtr ctxt, int nargs);
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void xmlXPathTranslateFunction(xmlXPathParserContextPtr ctxt, int nargs);
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void xmlXPathNotFunction(xmlXPathParserContextPtr ctxt, int nargs);
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void xmlXPathTrueFunction(xmlXPathParserContextPtr ctxt, int nargs);
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void xmlXPathFalseFunction(xmlXPathParserContextPtr ctxt, int nargs);
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void xmlXPathLangFunction(xmlXPathParserContextPtr ctxt, int nargs);
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void xmlXPathNumberFunction(xmlXPathParserContextPtr ctxt, int nargs);
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void xmlXPathSumFunction(xmlXPathParserContextPtr ctxt, int nargs);
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void xmlXPathFloorFunction(xmlXPathParserContextPtr ctxt, int nargs);
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void xmlXPathCeilingFunction(xmlXPathParserContextPtr ctxt, int nargs);
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void xmlXPathRoundFunction(xmlXPathParserContextPtr ctxt, int nargs);
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void xmlXPathBooleanFunction(xmlXPathParserContextPtr ctxt, int nargs);
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#ifdef __cplusplus
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}
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#endif
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#endif /* ! __XML_XPATH_INTERNALS_H__ */
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