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main.cpp
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main.cpp
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#include<stdlib.h>
#include<string.h>
#include"FM.h"
#include <time.h>
#include<ctime>
#include<fstream>
#include<iostream>
using namespace std;
void usage();
void helpbuild();
void helpload();
void helpsave();
void helpcount();
void helplocate();
void splitcommand(string command,string result[]);
void showpos( int * pos,int num);
int main(int argc, char* argv[])
{
usage();
string command;
string result[3];
char filename[100]={'\0'};
char indexname[100]={'\0'};
FM *csa=NULL;
while(1)
{
result[0]="";//the choice of funtion items
result[1]="";//filename of data file to build function or pattern to count function
command="";
cout<<">";
getline(cin,command);
command+=" ";
splitcommand(command,result);
if(result[0]=="quit")
{
break;
}
else if(result[0]=="build")
{
if(csa!=NULL)
delete csa;
csa=NULL;
clock_t s = clock();
int speed = atoi(result[2].c_str());
csa=new FM(result[1].data(), speed);
clock_t e = clock();
cout<<"build time(s):" << (e-s)*1.0/CLOCKS_PER_SEC<<endl;
}
else if(result[0]=="count")
{
int num=0;
if(csa!=NULL)
{
csa->counting(result[1].data(),num);
cout<<"occs: "<<num<<endl;
}
else
{
cout<<"build a FM first"<<endl;
}
}
else if(result[0]=="locate")
{
int * pos;
int num=0;
if(csa!=NULL)
{
pos=csa->locating(result[1].data(),num);
showpos(pos,num);
delete [] pos;
}
else
cout<<"build a FM first"<<endl;
}
else if(result[0]=="load")
{
if(csa!=NULL)
delete csa;
csa=new FM();
csa->load(result[1].data());
}
else if(result[0]=="save")
{
csa->save(result[1].data());
}
else if(result[0]=="size")
{
if(csa!=NULL)
cout<<csa->compressRatioForCount()<<endl;
else
cout<<"build a FM first"<<endl;
}
else if(result[0]=="help")
{
if(result[1]=="build")
helpbuild();
if(result[1]=="count")
helpcount();
if(result[1]=="locate")
helplocate();
if(result[1]=="load")
helpload();
if(result[1]=="save")
helpsave();
}
else
usage();
}
return 0;
}
void showpos(int * pos,int num)
{
cout<<"occs:"<<num<<endl;
for(long int i=0;i<num;i++)
{
cout<<pos[i]<<endl;
if((i+1)%20==0)
{
char command;
cout<<"-----------------more---------------------";
system("stty raw");
command=getchar();
cout<<endl<<'\r';
system("stty cooked");
if(command==27)
{
cout<<endl;
return ;
}
}
}
}
void splitcommand(string command,string result[])
{
int i=0;
int start=0;
int len=command.length();
int j = 0;
result[0]=command;
for(i=0;i<len;i++)
{
if(command[i] == ' ')
{
result[j++] = command.substr(start,i - start);
start = i + 1;
}
}
}
void usage()
{
cout<<"--------------------------------------------------------------------------------------"<<endl;
cout<<"The flowing commands are supported "<<endl;
cout<<" help XX: show the details for the command XX"<<endl;
cout<<" build XX Y:build the index of file XX with speedlevel Y"<<endl;
cout<<" load XX: load the index file XX"<<endl;
cout<<" save XX: write the csa to a index file XX"<<endl;
cout<<" count XX: count the pattern XX's occs" <<endl;
cout<<" locate YY: enum eyery position of the pattern"<<endl;
cout<<" size: the size of the csa"<<endl;
cout<<" quit: say goodbye"<<endl;
}
void helpbuild()
{
cout<<"build XX"<<endl;
cout<<" XX:the source file,it's you responsibility to provide a correct path"<<endl;
}
void helpcount()
{
cout<<"count XX"<<endl;
cout<<" XX:the pattern.you have the responsibility to ensure the index csa is nearby,otherwise,nothing you will get"<<endl;
}
void helplocate()
{
cout<<"locate XX"<<endl;
cout<<" XX: the pattern.it's like count, and you can scan the positions of all the occs in a manner like the system command -more-"<<endl;
}
void helpload()
{
cout<<"load XX"<<endl;
cout<<" XX: the FM-index file, the command will read the index file and build a csa secretly"<<endl;
}
void helpsave()
{
cout<<"save XX"<<endl;
cout<<" XX: the FM-index file, the command will save the csa in file XX"<<endl;
}