晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 sh-3ll

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/*
 * Summary: API to handle XML Pointers
 * Description: API to handle XML Pointers
 * Base implementation was made accordingly to
 * W3C Candidate Recommendation 7 June 2000
 * http://www.w3.org/TR/2000/CR-xptr-20000607
 *
 * Added support for the element() scheme described in:
 * W3C Proposed Recommendation 13 November 2002
 * http://www.w3.org/TR/2002/PR-xptr-element-20021113/
 *
 * Copy: See Copyright for the status of this software.
 *
 * Author: Daniel Veillard
 */

#ifndef __XML_XPTR_H__
#define __XML_XPTR_H__

#include <libxml/xmlversion.h>

#ifdef LIBXML_XPTR_ENABLED

#include <libxml/tree.h>
#include <libxml/xpath.h>

#ifdef __cplusplus
extern "C" {
#endif

#if defined(LIBXML_XPTR_LOCS_ENABLED)
/*
 * A Location Set
 */
typedef struct _xmlLocationSet xmlLocationSet;
typedef xmlLocationSet *xmlLocationSetPtr;
struct _xmlLocationSet {
    int locNr;		      /* number of locations in the set */
    int locMax;		      /* size of the array as allocated */
    xmlXPathObjectPtr *locTab;/* array of locations */
};

/*
 * Handling of location sets.
 */

XML_DEPRECATED
XMLPUBFUN xmlLocationSetPtr
		    xmlXPtrLocationSetCreate	(xmlXPathObjectPtr val);
XML_DEPRECATED
XMLPUBFUN void
		    xmlXPtrFreeLocationSet	(xmlLocationSetPtr obj);
XML_DEPRECATED
XMLPUBFUN xmlLocationSetPtr
		    xmlXPtrLocationSetMerge	(xmlLocationSetPtr val1,
						 xmlLocationSetPtr val2);
XML_DEPRECATED
XMLPUBFUN xmlXPathObjectPtr
		    xmlXPtrNewRange		(xmlNodePtr start,
						 int startindex,
						 xmlNodePtr end,
						 int endindex);
XML_DEPRECATED
XMLPUBFUN xmlXPathObjectPtr
		    xmlXPtrNewRangePoints	(xmlXPathObjectPtr start,
						 xmlXPathObjectPtr end);
XML_DEPRECATED
XMLPUBFUN xmlXPathObjectPtr
		    xmlXPtrNewRangeNodePoint	(xmlNodePtr start,
						 xmlXPathObjectPtr end);
XML_DEPRECATED
XMLPUBFUN xmlXPathObjectPtr
		    xmlXPtrNewRangePointNode	(xmlXPathObjectPtr start,
						 xmlNodePtr end);
XML_DEPRECATED
XMLPUBFUN xmlXPathObjectPtr
		    xmlXPtrNewRangeNodes	(xmlNodePtr start,
						 xmlNodePtr end);
XML_DEPRECATED
XMLPUBFUN xmlXPathObjectPtr
		    xmlXPtrNewLocationSetNodes	(xmlNodePtr start,
						 xmlNodePtr end);
XML_DEPRECATED
XMLPUBFUN xmlXPathObjectPtr
		    xmlXPtrNewLocationSetNodeSet(xmlNodeSetPtr set);
XML_DEPRECATED
XMLPUBFUN xmlXPathObjectPtr
		    xmlXPtrNewRangeNodeObject	(xmlNodePtr start,
						 xmlXPathObjectPtr end);
XML_DEPRECATED
XMLPUBFUN xmlXPathObjectPtr
		    xmlXPtrNewCollapsedRange	(xmlNodePtr start);
XML_DEPRECATED
XMLPUBFUN void
		    xmlXPtrLocationSetAdd	(xmlLocationSetPtr cur,
						 xmlXPathObjectPtr val);
XML_DEPRECATED
XMLPUBFUN xmlXPathObjectPtr
		    xmlXPtrWrapLocationSet	(xmlLocationSetPtr val);
XML_DEPRECATED
XMLPUBFUN void
		    xmlXPtrLocationSetDel	(xmlLocationSetPtr cur,
						 xmlXPathObjectPtr val);
XML_DEPRECATED
XMLPUBFUN void
		    xmlXPtrLocationSetRemove	(xmlLocationSetPtr cur,
						 int val);
#endif /* defined(LIBXML_XPTR_LOCS_ENABLED) */

/*
 * Functions.
 */
XMLPUBFUN xmlXPathContextPtr
		    xmlXPtrNewContext		(xmlDocPtr doc,
						 xmlNodePtr here,
						 xmlNodePtr origin);
XMLPUBFUN xmlXPathObjectPtr
		    xmlXPtrEval			(const xmlChar *str,
						 xmlXPathContextPtr ctx);

#if defined(LIBXML_XPTR_LOCS_ENABLED)
XML_DEPRECATED
XMLPUBFUN void
		    xmlXPtrRangeToFunction	(xmlXPathParserContextPtr ctxt,
						 int nargs);
XML_DEPRECATED
XMLPUBFUN xmlNodePtr
		    xmlXPtrBuildNodeList	(xmlXPathObjectPtr obj);
XML_DEPRECATED
XMLPUBFUN void
		    xmlXPtrEvalRangePredicate	(xmlXPathParserContextPtr ctxt);
#endif /* defined(LIBXML_XPTR_LOCS_ENABLED) */
#ifdef __cplusplus
}
#endif

#endif /* LIBXML_XPTR_ENABLED */
#endif /* __XML_XPTR_H__ */