isamfile.cpp

小型搜索引擎,用C/C++编写,属于全文搜索引擎

#include "Tse.h"


int IsamFile(const char* url, char* buffer, int len)
{
	//static int debug_count=0;
	//debug_count++;
	
	int offsett;
	FILE *fpDataFile;
	FILE *fpIdxFile;

	fpDataFile = fopen(DATA_FILE_NAME.c_str(),"a");
	if( fpDataFile == NULL){
		return -1;
	}
	
	fpIdxFile = fopen(INDEX_FILE_NAME.c_str(),"a");
	if( fpIdxFile == NULL){
		return -1;
	}

	offsett = ftell(fpDataFile);
	fprintf(fpIdxFile, "%10d", offsett);
	fprintf(fpIdxFile, "%256s\n", url);
	fclose(fpIdxFile);

	fwrite( buffer, 1, len, fpDataFile); 

	//write 25 spaces in the file
	for(int i=0; i<25; i++){
		fputc(0,fpDataFile);
	}

	//write 3 '1' in the file
	fputc(1,fpDataFile);
	fputc(1,fpDataFile);
	fputc(1,fpDataFile);

	//write [url] in the file
	fputc(91,fpDataFile);
	fwrite( url, 1, strlen(url), fpDataFile);
	fputc(93,fpDataFile);

	for(int i=0; i<25; i++){
		fputc(0,fpDataFile);
	}

	fclose(fpDataFile);

	return 0;
}