kc3-lang/libxml2/xpathInternals.h

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• Hash : 3473f88a
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  Date : 2001-02-23T17:55:21
  

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• xpathInternals.h

• /*
   * xpath.c: internal interfaces for XML Path Language implementation
   *          used to build new modules on top of XPath
   *
   * See COPYRIGHT for the status of this software
   *
   * Author: Daniel.Veillard@w3.org
   */
  
  #ifndef __XML_XPATH_INTERNALS_H__
  #define __XML_XPATH_INTERNALS_H__
  
  #include <libxml/xpath.h>
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  /************************************************************************
   *									*
   *			Helpers						*
   *									*
   ************************************************************************/
  
  #define CHECK_ERROR							\
      if (ctxt->error != XPATH_EXPRESSION_OK) return
  
  #define CHECK_ERROR0							\
      if (ctxt->error != XPATH_EXPRESSION_OK) return(0)
  
  #define XP_ERROR(X)							\
      { xmlXPatherror(ctxt, __FILE__, __LINE__, X);			\
        ctxt->error = (X); return; }
  
  #define XP_ERROR0(X)							\
      { xmlXPatherror(ctxt, __FILE__, __LINE__, X);			\
        ctxt->error = (X); return(0); }
  
  #define CHECK_TYPE(typeval)						\
      if ((ctxt->value == NULL) || (ctxt->value->type != typeval))	\
          XP_ERROR(XPATH_INVALID_TYPE)
  
  #define CHECK_ARITY(x)							\
      if (nargs != (x))							\
          XP_ERROR(XPATH_INVALID_ARITY);
  
  #define CAST_TO_STRING							\
      if ((ctxt->value != NULL) && (ctxt->value->type != XPATH_STRING))	\
          xmlXPathStringFunction(ctxt, 1);
  
  #define CAST_TO_NUMBER							\
      if ((ctxt->value != NULL) && (ctxt->value->type != XPATH_NUMBER))	\
          xmlXPathNumberFunction(ctxt, 1);
  
  #define CAST_TO_BOOLEAN							\
      if ((ctxt->value != NULL) && (ctxt->value->type != XPATH_BOOLEAN))	\
          xmlXPathBooleanFunction(ctxt, 1);
  
  /*
   * Varibale Lookup forwarding
   */
  typedef xmlXPathObjectPtr
  	(*xmlXPathVariableLookupFunc)	(void *ctxt,
  					 const xmlChar *name,
  					 const xmlChar *ns_uri);
  
  void	xmlXPathRegisterVariableLookup	(xmlXPathContextPtr ctxt,
  					 xmlXPathVariableLookupFunc f,
  					 void *varCtxt);
  
  /*
   * Error reporting
   */
  void		xmlXPatherror	(xmlXPathParserContextPtr ctxt,
  				 const char *file,
  				 int line,
  				 int no);
  
  void		xmlXPathDebugDumpObject	(FILE *output,
  					 xmlXPathObjectPtr cur,
  					 int depth);
  
  /**
   * Extending a context
   */
  
  int		   xmlXPathRegisterNs		(xmlXPathContextPtr ctxt,
  						 const xmlChar *prefix,
  						 const xmlChar *ns_uri);
  const xmlChar *	   xmlXPathNsLookup		(xmlXPathContextPtr ctxt,
  						 const xmlChar *ns_uri);
  void		   xmlXPathRegisteredNsCleanup	(xmlXPathContextPtr ctxt);
  
  int		   xmlXPathRegisterFunc		(xmlXPathContextPtr ctxt,
  						 const xmlChar *name,
  						 xmlXPathFunction f);
  int		   xmlXPathRegisterFuncNS	(xmlXPathContextPtr ctxt,
  						 const xmlChar *name,
  						 const xmlChar *ns_uri,
  						 xmlXPathFunction f);
  int		   xmlXPathRegisterVariable	(xmlXPathContextPtr ctxt,
  						 const xmlChar *name,
  						 xmlXPathObjectPtr value);
  int		   xmlXPathRegisterVariableNS	(xmlXPathContextPtr ctxt,
  						 const xmlChar *name,
  						 const xmlChar *ns_uri,
  						 xmlXPathObjectPtr value);
  xmlXPathFunction   xmlXPathFunctionLookup	(xmlXPathContextPtr ctxt,
  						 const xmlChar *name);
  xmlXPathFunction   xmlXPathFunctionLookupNS	(xmlXPathContextPtr ctxt,
  						 const xmlChar *name,
  						 const xmlChar *ns_uri);
  void		   xmlXPathRegisteredFuncsCleanup(xmlXPathContextPtr ctxt);
  xmlXPathObjectPtr  xmlXPathVariableLookup	(xmlXPathContextPtr ctxt,
  						 const xmlChar *name);
  xmlXPathObjectPtr  xmlXPathVariableLookupNS	(xmlXPathContextPtr ctxt,
  						 const xmlChar *name,
  						 const xmlChar *ns_uri);
  void		   xmlXPathRegisteredVariablesCleanup(xmlXPathContextPtr ctxt);
  
  /**
   * Utilities to extend XPath
   */
  xmlXPathParserContextPtr
  		  xmlXPathNewParserContext	(const xmlChar *str,
  			  			 xmlXPathContextPtr ctxt);
  void		  xmlXPathFreeParserContext	(xmlXPathParserContextPtr ctxt);
  
  /* TODO: remap to xmlXPathValuePop and Push */
  xmlXPathObjectPtr valuePop			(xmlXPathParserContextPtr ctxt);
  int		  valuePush			(xmlXPathParserContextPtr ctxt,
  					 	xmlXPathObjectPtr value);
  
  xmlXPathObjectPtr xmlXPathNewString		(const xmlChar *val);
  xmlXPathObjectPtr xmlXPathNewCString		(const char *val);
  xmlXPathObjectPtr xmlXPathNewFloat		(double val);
  xmlXPathObjectPtr xmlXPathNewBoolean		(int val);
  xmlXPathObjectPtr xmlXPathNewNodeSet		(xmlNodePtr val);
  xmlXPathObjectPtr xmlXPathNewValueTree		(xmlNodePtr val);
  void		  xmlXPathNodeSetAdd		(xmlNodeSetPtr cur,
  						 xmlNodePtr val);
  
  
  void		  xmlXPathIdFunction		(xmlXPathParserContextPtr ctxt,
  					 	int nargs);
  void		  xmlXPathRoot			(xmlXPathParserContextPtr ctxt);
  void		  xmlXPathEvalExpr		(xmlXPathParserContextPtr ctxt);
  xmlChar *	  xmlXPathParseName		(xmlXPathParserContextPtr ctxt);
  xmlChar *	  xmlXPathParseNCName		(xmlXPathParserContextPtr ctxt);
  
  /*
   * Debug
   */
  #ifdef LIBXML_DEBUG_ENABLED
  double xmlXPathStringEvalNumber(const xmlChar *str);
  void xmlXPathDebugDumpObject(FILE *output, xmlXPathObjectPtr cur, int depth);
  #endif
  /*
   * Existing functions
   */
  
  int xmlXPathEvaluatePredicateResult(xmlXPathParserContextPtr ctxt, 
                                      xmlXPathObjectPtr res);
  void xmlXPathInit(void);
  void xmlXPathStringFunction(xmlXPathParserContextPtr ctxt, int nargs);
  void xmlXPathRegisterAllFunctions(xmlXPathContextPtr ctxt);
  xmlNodeSetPtr xmlXPathNodeSetCreate(xmlNodePtr val);
  void xmlXPathNodeSetAdd(xmlNodeSetPtr cur, xmlNodePtr val);
  xmlNodeSetPtr xmlXPathNodeSetMerge(xmlNodeSetPtr val1, xmlNodeSetPtr val2);
  void xmlXPathNodeSetDel(xmlNodeSetPtr cur, xmlNodePtr val);
  void xmlXPathNodeSetRemove(xmlNodeSetPtr cur, int val);
  void xmlXPathFreeNodeSet(xmlNodeSetPtr obj);
  xmlXPathObjectPtr xmlXPathNewNodeSet(xmlNodePtr val);
  xmlXPathObjectPtr xmlXPathNewNodeSetList(xmlNodeSetPtr val);
  xmlXPathObjectPtr xmlXPathWrapNodeSet(xmlNodeSetPtr val);
  void xmlXPathFreeNodeSetList(xmlXPathObjectPtr obj);
  
  
  xmlXPathObjectPtr xmlXPathNewFloat(double val);
  xmlXPathObjectPtr xmlXPathNewBoolean(int val);
  xmlXPathObjectPtr xmlXPathNewString(const xmlChar *val);
  xmlXPathObjectPtr xmlXPathNewCString(const char *val);
  void xmlXPathFreeObject(xmlXPathObjectPtr obj);
  xmlXPathContextPtr xmlXPathNewContext(xmlDocPtr doc);
  void xmlXPathFreeContext(xmlXPathContextPtr ctxt);
  
  int xmlXPathEqualValues(xmlXPathParserContextPtr ctxt);
  int xmlXPathCompareValues(xmlXPathParserContextPtr ctxt, int inf, int strict);
  void xmlXPathValueFlipSign(xmlXPathParserContextPtr ctxt);
  void xmlXPathAddValues(xmlXPathParserContextPtr ctxt);
  void xmlXPathSubValues(xmlXPathParserContextPtr ctxt);
  void xmlXPathMultValues(xmlXPathParserContextPtr ctxt);
  void xmlXPathDivValues(xmlXPathParserContextPtr ctxt);
  void xmlXPathModValues(xmlXPathParserContextPtr ctxt);
  
  
  /*
   * Some of the axis navigation routines
   */
  xmlNodePtr xmlXPathNextPreceding(xmlXPathParserContextPtr ctxt, xmlNodePtr cur);
  xmlNodePtr xmlXPathNextAncestor(xmlXPathParserContextPtr ctxt, xmlNodePtr cur);
  xmlNodePtr xmlXPathNextPrecedingSibling(xmlXPathParserContextPtr ctxt, xmlNodePtr cur);
  /*
   * The official core of XPath functions
   */
  void xmlXPathRoot(xmlXPathParserContextPtr ctxt);
  void xmlXPathLastFunction(xmlXPathParserContextPtr ctxt, int nargs);
  void xmlXPathPositionFunction(xmlXPathParserContextPtr ctxt, int nargs);
  void xmlXPathCountFunction(xmlXPathParserContextPtr ctxt, int nargs);
  void xmlXPathIdFunction(xmlXPathParserContextPtr ctxt, int nargs);
  void xmlXPathLocalNameFunction(xmlXPathParserContextPtr ctxt, int nargs);
  void xmlXPathNamespaceURIFunction(xmlXPathParserContextPtr ctxt, int nargs);
  void xmlXPathStringFunction(xmlXPathParserContextPtr ctxt, int nargs);
  void xmlXPathStringLengthFunction(xmlXPathParserContextPtr ctxt, int nargs);
  void xmlXPathConcatFunction(xmlXPathParserContextPtr ctxt, int nargs);
  void xmlXPathContainsFunction(xmlXPathParserContextPtr ctxt, int nargs);
  void xmlXPathStartsWithFunction(xmlXPathParserContextPtr ctxt, int nargs);
  void xmlXPathSubstringFunction(xmlXPathParserContextPtr ctxt, int nargs);
  void xmlXPathSubstringBeforeFunction(xmlXPathParserContextPtr ctxt, int nargs);
  void xmlXPathSubstringAfterFunction(xmlXPathParserContextPtr ctxt, int nargs);
  void xmlXPathNormalizeFunction(xmlXPathParserContextPtr ctxt, int nargs);
  void xmlXPathTranslateFunction(xmlXPathParserContextPtr ctxt, int nargs);
  void xmlXPathNotFunction(xmlXPathParserContextPtr ctxt, int nargs);
  void xmlXPathTrueFunction(xmlXPathParserContextPtr ctxt, int nargs);
  void xmlXPathFalseFunction(xmlXPathParserContextPtr ctxt, int nargs);
  void xmlXPathLangFunction(xmlXPathParserContextPtr ctxt, int nargs);
  void xmlXPathNumberFunction(xmlXPathParserContextPtr ctxt, int nargs);
  void xmlXPathSumFunction(xmlXPathParserContextPtr ctxt, int nargs);
  void xmlXPathFloorFunction(xmlXPathParserContextPtr ctxt, int nargs);
  void xmlXPathCeilingFunction(xmlXPathParserContextPtr ctxt, int nargs);
  void xmlXPathRoundFunction(xmlXPathParserContextPtr ctxt, int nargs);
  void xmlXPathBooleanFunction(xmlXPathParserContextPtr ctxt, int nargs);
  #ifdef __cplusplus
  }
  #endif
  #endif /* ! __XML_XPATH_INTERNALS_H__ */
  

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