dbconfig.c

在LINUX下实现的一个超市的收银系统

#include "extern.h"
/*==============数据库配置保存==========*/
int SaveConfig(char *dbname,char *dbuser,char *dbpassword)
{	
	FILE *fp;
	int temp;
	char str[12][100] =
	{
		"#\n",
		"# database  name\n",
		"#\n",
		"dbname=",
		"#\n",
		"# database login user name\n",
		"#\n",
		"dbuser=",
		"#\n",
		"# database login user password\n",
		"#\n",
		"dbpwd=",
	 };
	
    if((fp = fopen("dbconfig.conf","w")) == NULL)
	{
		return 0;
	}

    strcat(str[3],dbname);
    strcat(str[3], "\n");
    strcat(str[7], dbuser);
    strcat(str[7], "\n");
    strcat(str[11], dbpassword);
    strcat(str[11], "\n");
    for( temp = 0; temp < 12; temp++)
	{
		fputs(str[temp], fp);
	}

    fclose(fp);
    return 1;
}

/*==============数据库配置读取============*/
int ReadConfig(char *fname)
{
	char *temp[] = {
		"undefinde",
		"dbuser",
		"dbpwd",
		"dbname",
		0
	};
	
	char buf[256];
	char *p, *value;
	int i,j;

	FILE* fp=fopen(fname,"r");

	if (NULL == fp)
	{
		return 0;
	}
	
	while(fgets(buf,sizeof(buf),fp) != NULL)
	{
		LTrim(buf);
		RTrim(buf);

		if((buf[0] == '#') || strlen(buf) == 0 )
		{
			continue;
		}
		i=0;

		p = strtok(buf,"=");
		if(p == NULL)
		{
			continue;
		}

		LTrim(p);
		RTrim(p);

		for (j=1; j<=3; j++)	
		{
			if (strncmp(p, temp[j],strlen(temp[j]))==0) 
			{
				i = j;
				break;
			}
		}
		value=strtok(0,"=");

		if ((value == NULL) || (!isascii(value[0]))) 
		{
			continue;
		}

		LTrim(value);
		RTrim(value);

		switch (i) 
		{
			case 1:
				strcpy(DBUSER,value);
				break;
			case 2:
				strcpy(DBPASSWD,value);
				break;
			case 3:
				strcpy(DBNAME,value);
				break;
		} 
	}
	
	return 1;
}