gen_ped.c

在MPI上实现并行串匹配的源代码。

#include <stdio.h>

#include <stdlib.h>

#include <malloc.h>

#include <string.h>


void main(argc,argv)

int argc;
char *argv[];

{

   int strlen,pedlen,suffixlen,num,i,j;

   char *string;

   FILE *fp;


   printf("Usage: gen_ped stringlen,pedlen,seed,filename\n");
 
   strlen=atoi(argv[1]);

   pedlen=atoi(argv[2]);
  
 srand(atoi(argv[3]));
  
 string=(char*)malloc(strlen*sizeof(char));

   if(string==NULL)

   {
  
    printf("malloc error\n");

      exit(1);
 
  }

   for(i=0;i<pedlen;i++){

        num=rand()%26;

        string[i]='a'+num;
  
 }
 
  for(j=1;j<(int)(strlen/pedlen);j++)
    
    strncpy(string+j*pedlen,string,pedlen);

   if((suffixlen=strlen%pedlen)!=0)
     
   strncpy(string+j*pedlen,string,suffixlen);
 
  if((fp=fopen(argv[4],"w"))!=NULL){

     fprintf(fp,"%s",string); 
  
   fclose(fp);
  
 }
  
 else{
   
  printf("file open error\n");
  
   exit(1);
 
  }

}