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e302ceefde
This is a (mostly) unmodified version of lib/libnet broken up into functional areas It should be binary compatible with the lib created by lib/libnet but is now 10 libs. The only substantial things changed in the version is the include files
156 lines
4.4 KiB
C
156 lines
4.4 KiB
C
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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/*** htmparse.h ***************************************************/
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/* description: html parser */
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/********************************************************************
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The client calls CRAWL_ParserPut, and gets called back with
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a function whose prototype is described by CRAWL_ParseFunc. The
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parser calls this function whenever a begin or end tag, or run of
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character data has been scanned, and does not build a tree.
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$Revision: 1.1 $
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$Date: 1998/04/30 20:53:21 $
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*********************************************************************/
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#ifndef htmparse_h___
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#define htmparse_h___
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#include "prtypes.h"
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/* return values from CRAWL_ParserPut */
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#define CRAWL_PARSE_NO_ERROR 0 /* no error */
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#define CRAWL_PARSE_ERROR 1 /* syntax error */
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#define CRAWL_PARSE_TERMINATE 2 /* don't continue to parse */
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#define CRAWL_PARSE_OUT_OF_MEMORY 3 /* out of memory */
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/* return values for CRAWL_ParseFunc callback function */
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#define PARSE_GET_NEXT_TOKEN 0
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#define PARSE_STOP 1
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#define PARSE_OUT_OF_MEMORY 2
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typedef struct _CRAWL_TagStruc *CRAWL_Tag;
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/*
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The client of this API creates a reference to this with CRAWL_MakeParseObj and provides it as
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a parameter to CRAWL_ParserPut. It is passed as a parameter to the CRAWL_ParseFunc function and
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the parsed data may be extracted from it through the API. It should be considered opaque data.
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*/
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typedef struct _CRAWL_ParseObjStruc *CRAWL_ParseObj;
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/*
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Typedef for a parse callback. The memory in CRAWL_ParseObj is reused across successive calls.
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*/
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typedef int
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(PR_CALLBACK *CRAWL_ParseFunc)(CRAWL_ParseObj obj, PRBool isTag, void *data);
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/****************************************************************************************/
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/* public API */
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/****************************************************************************************/
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NSPR_BEGIN_EXTERN_C
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/*
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Returns the tag parsed
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*/
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PR_EXTERN(CRAWL_Tag)
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CRAWL_GetTagParsed(CRAWL_ParseObj obj);
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/*
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Returns the character data between tags
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*/
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PR_EXTERN(char*)
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CRAWL_GetDataParsed(CRAWL_ParseObj obj);
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/*
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Returns the tag name
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*/
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PR_EXTERN(char*)
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CRAWL_GetTagName(CRAWL_Tag tag);
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/*
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Returns the libparse tag code as defined in pa_tags.h
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*/
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PR_EXTERN(intn)
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CRAWL_GetTagToken(CRAWL_Tag tag);
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/*
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a tag of the form <tagname /> Empty tags are recognized only if the page has been designated as
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containing RDF (the API doesn't support this yet)
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*/
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PR_EXTERN(PRBool)
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CRAWL_IsEmptyTag(CRAWL_Tag tag);
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/*
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A tag of the form </tagname>.
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*/
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PR_EXTERN(PRBool)
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CRAWL_IsEndTag(CRAWL_Tag tag);
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/*
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Returns the tag attribute given a name
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*/
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PR_EXTERN(char*)
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CRAWL_GetAttributeValue(CRAWL_Tag tag, char *attributeName);
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/*
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Returns the number of attributes for the tag.
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*/
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PR_EXTERN(uint16)
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CRAWL_GetNumberOfAttributes(CRAWL_Tag tag);
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/*
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Returns the nth attribute of the tag.
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*/
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PR_EXTERN(char*)
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CRAWL_GetNthAttributeName(CRAWL_Tag tag, uint16 n);
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/*
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Returns the nth attribute value of the tag.
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*/
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PR_EXTERN(char*)
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CRAWL_GetNthAttributeValue(CRAWL_Tag tag, uint16 n);
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/*
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Creates a new CRAWL_ParseObj suitable for passing to CRAWL_ParserPut.
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Returns NULL if out of memory.
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*/
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PR_EXTERN(CRAWL_ParseObj)
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CRAWL_MakeParseObj();
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/*
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Destroys the CRAWL_ParseObj and all associated memory
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*/
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PR_EXTERN(void)
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CRAWL_DestroyParseObj(CRAWL_ParseObj obj);
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/*
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Parse characters in buffer and call func when an element (tag or data) has been
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scanned. Returns an error code. The same CRAWL_ParseObj must be provided for successive
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puts in the same buffer. It is up to the caller to create and destroy the CRAWL_ParseObj.
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*/
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PR_EXTERN(int)
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CRAWL_ParserPut(CRAWL_ParseObj obj, char *str, uint32 len, CRAWL_ParseFunc func, void *data);
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NSPR_END_EXTERN_C
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#endif /* htmparse_h___ */
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