SDI (Sound Device Interface)--A library for Auditory Display

/***************************************************************************
[Copy Right Info]

File Name: parser.cpp

Description:
	Implementation of text parser

Compile to: parser.dll
***************************************************************************/

#include "StdAfx.h"
#include "parser.h"
#include <string.h>
#include <tchar.h>

#define SITELANGUAGE		LANGUAGE_MANDARIN_CHINESE		
#define NUM_CATEGORY		(11)		
#define SITENAME  		    "�����������������"
#define SITEURL				("http://www.chinanews.com.cn")	
			
#define LANDMARK_TITLEURL		"n/2004"
#define LANDMARK_TITLE			"=_blank>"

CATEGORY g_category[NUM_CATEGORY]={
{"��������","http://www.chinanews.com.cn/scroll-news/1.shtml", NULL,0},
{"��������","http://www.chinanews.com.cn/china.shtml", NULL,0},
{"��������","http://www.chinanews.com.cn/world.shtml", NULL,0},
{"�������","http://www.chinanews.com.cn/society.shtml", NULL,0},
{"��������","http://www.chinanews.com.cn/economic.shtml", NULL,0},
{"��������","http://www.chinanews.com.cn/sports.shtml", NULL,0},
{"��������","http://www.chinanews.com.cn/entertainment.shtml", NULL,0},
{"�ƽ�����","http://www.chinanews.com.cn/science.shtml", NULL,0},
{"��������","http://www.chinanews.com.cn/huaren.shtml", NULL,0},
{"�۰�����","http://www.chinanews.com.cn/compatriot.shtml", NULL,0},
{"̨������","http://www.chinanews.com.cn/taiwan.shtml", NULL,0}};

PARSERDESC g_parserDesc;

#define MAX_CATEGORY		11
#define MAX_SPAN			200

#define STRING_LABLE1		"http://www.chinanews.com.cn/n/"
#define STRING_LABLE2		"blank>"
#define STRING_LABLE3		"&gt;&gt;"
#define STRING_LABLE4		"<a href=\""

#define STRING_LABLE4_LEN	9		// _tcslen(STRING_LABLE4)
#define CAT1_ITEM_URL_LEN	55	// eg. http://www.chinanews.com.cn/n/2004-02-03/26/397496.html
#define STRING_LABLE1_LEN	30	// _tcslen(STRING_LABLE1)
#define STRING_LABLE2_LEN	6
#define CAT2_ITEM_URL_LEN	25	// CAT1_ITEM_URL_LEN - STRING_LABLE1_LEN =55-30

UINT  g_uItem=0;

// Helper Function
UINT FindCategoryFromString(PTSTR psCategory)
{
	PTSTR p1,p2;
	for(UINT i=0;i<MAX_CATEGORY;i++)
	{
		p1=_tcsdup(psCategory);
		p2=_tcsdup(g_category[i].psCategoryName);
		p1[5]='\0';	  // Compare the first two chinese characters.
		p2[5]='\0';  
		if(_tcscmp(p1,p2)==0)
			return i;
	}
	return -1;
}

INT ParseTitle(PTSTR psText, INT nCategory, TITLE* pTitle)
{
	PTSTR pt=psText,p;
	INT  nItem=0,j=0,uCategory=-1;
	TCHAR ps[1024]="";

	// Find out how many items are there in psText.
	while(pt=_tcsstr(pt,LANDMARK_TITLEURL))
	{
		nItem++;
		pt++;
	}
	if(pTitle == NULL)
	{
		g_parserDesc.pCategory[nCategory].nTitle=nItem;
		return nItem;
	}
	
	// Fill title data
	pt=psText;
	while(pt=_tcsstr(pt,LANDMARK_TITLEURL))
	{
		_tcscpy(ps, "http://www.chinanews.com.cn/");
		_tcsncat(ps, pt, 28);	// _tcslen("n/2004-02-04/26/397692.html")	
		
		pTitle->nCategory=nCategory;
		pTitle->psContentUrl=_tcsdup(ps);
		_tcscpy(ps, "");
		
		pt=_tcsstr(pt,LANDMARK_TITLE);
		pt+=_tcslen(LANDMARK_TITLE);
		p=_tcsstr(pt, "</");
		
		_tcsncat(ps, pt, p-pt);
		pTitle->psTitle=_tcsdup(ps);
		
		pTitle++;

	}
	
	return nItem;
}

INT ParseContent(PTSTR psText, INT nCategory, PTSTR psContent)
{
	TCHAR text[20000];
	PTSTR psCursor=text;
	PTSTR p=psText,p1,p2;
	
	PTSTR lable1="<p>";
	PTSTR lable2="</p>";
	
	_tcslwr(p);

	while(p=_tcsstr(p,lable1))
	{
		p+=3;	// Bypass the "<p>"
		p1=_tcsstr(p, "<");
		if(p1-p > 20)
		{
			_tcsncpy(psCursor, p, (size_t)(p1-p));
			psCursor+=p1-p;
		}
	}
	*psCursor='\0';
	size_t size=(LONG)psCursor-(LONG)text+1;
	if(psContent != NULL)
		_tcsncpy(psContent, text, size);
	return size;
}

PARSERDESC* GetParserDescriptor()
{
	g_parserDesc.nCategory=NUM_CATEGORY;
	g_parserDesc.pCategory=g_category;
	g_parserDesc.pfnParseTitle=ParseTitle;
	g_parserDesc.pfnParseContent=ParseContent;
	g_parserDesc.dwLanguage=SITELANGUAGE;
	g_parserDesc.psSiteName=SITENAME;
	g_parserDesc.psSiteUrl=SITEURL;
	return &g_parserDesc;
}