file.c

一个C语言的SOCKET程序

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#define FileOpenFail -1401
#define EnvFileFail  -1402

GetEnv(char *filename,char *envname,char *envval)
{
  FILE *fp;
  char fileline[200];
  char fileenv[100];
  char fileenvval[100];

  fp=fopen(filename,"r");
  if (fp==NULL)
  { ShowMsg("FILE %s CAN NOT OPEN \n",filename);
    return FileOpenFail;
  }
  while(!feof(fp))
  {
    if (fgets(fileline,200,fp)==NULL) break;
    if (strlen(fileline)!=0) fileline[strlen(fileline)-1]='\0';

    memset(fileenv,'\0',sizeof(fileenv));
    memset(fileenvval,'\0',sizeof(fileenvval));

    strdepart(fileline,'=',fileenv,fileenvval);

    if (strcmp(fileenv,envname)==0) 
    {strcpy(envval,fileenvval);  
     fclose(fp);
     return(0);
     }
  }
  return(0);
}

strdepart(char *a,char d,char *a1,char *a2)
{
   int i=0,j=0;
   if (a[i]=='\0') return(0);
   while(1)
  { 
   if (a[i]=='\0')  break;
   if (a[i]==d)     break;
   a1[i]=a[i];
   i++;
   }
  if (a[i]=='\0') 
  { ShowMsg("EnvFile Line: %s Not Correct!\n",a);
    return(EnvFileFail);}
  strcpy(a2,a+i+1); 
}  

long GetFileSize(char *Filename)
{
    FILE *fp;
   
	long lSize;
    fp=fopen(Filename,"r");
    if (fp==NULL) return (-1);

	fseek(fp,0,SEEK_END);
/*	fgetpos(fp,&lSize); */
    lSize=ftell(fp);
	fseek(fp,0,SEEK_SET);

    fclose(fp);
	return lSize;
}

/*
char MsgLog[30]="./1.log";
main()
{ long a;
  a=GetFileSize("./tmp51"); 
  printf("filesize=%d\n",a);
}*/

/*
main()
{  char ip[100];
   GetEnv("1.cfg","nj400_ipaddr",ip);
   printf("get ip= %s len=%d\n",ip,strlen(ip));
   LookChar(ip,strlen(ip));
   
}*/