dlog.cpp

dget是一个基于Linux平台的多线程下载工具, 采用C++开发。主要支持FTP, HTTP, MMS, RTSP协议下载, 目前为止主要实现了FTP, HTTP, MMS,RTSP协议的多线程下载

/*
 * by balancesli
 * [e-mail]
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#include <stdio.h>
#include <stdlib.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>

#include "dLog.h"
#include "dget.h"
#include "Utils.h"


TLog :: TLog(char * s) : ConnCnt(4) 
{
	int Length = strlen(s) + 1;
	FileName = new char[Length];
	strcpy(FileName, s);
}

TLog ::	~TLog()
{
	delete []FileName;
}

int TLog :: CreateLogFile(int n)
{
    char buffer[128];
	
    FILE *fp = NULL;

    sprintf(buffer, "%s%s.log", FileName, DEFAULT_FILE_EXT);
	
    if (!(fp = fopen(buffer, "wb")))
		return -1;

	fwrite(&n, sizeof(n), 1, fp);
    
	fclose(fp);
    return 0;
}

bool TLog :: IsLogFileExist(void)
{
    char buffer[128];
    int ret;
    struct stat stbuf;

    sprintf(buffer, "%s%s.log", FileName, DEFAULT_FILE_EXT);
    ret = stat(buffer, &stbuf);
    if (ret == -1)
		return false;
	else
		return true;
}

int TLog :: DeleteLogFile(void)
{
    char buffer[MAXPATHLEN];
    int ret;

    sprintf(buffer, "%s%s.log", FileName, DEFAULT_FILE_EXT);
    ret = unlink(buffer);
    if (ret == -1)
    {
		if (errno == ENOENT)
		{
	    	return 0;
		} 
	    return -1;
    }
    return 0;
}

int TLog :: ReadLogFile(void)
{
    char buffer[MAXPATHLEN];
    FILE *fp = NULL;

    sprintf(buffer, "%s%s.log", FileName, DEFAULT_FILE_EXT);
    if (!(fp = fopen(buffer, "rb")))
		return -1;
	
    if (fread(&ConnCnt, sizeof(int), 1, fp) != 1)
    {
		fclose(fp);
		return -1;
    }

    fclose(fp);
    return 0;
}