list6-3.cpp

这是c++编程方面的名著的例子代码

#include <dirent.h>
#include <set.h>
#include <cstring.h>
#include <fstream.h>
#include <algo.h>
#include <string.h>
#include <list.h>
#include <stack.h>
#include <stddef.h>
#include <process.h>
#define INCL_DOSPROCESS
#define INCL_DOSSEMAPHORES
#include <os2.h>

queue< list<string> > TextFiles;
set<string,less<string> > KeyWords;
set<string,less<string> > SearchWords;
void threadA(void *X);
HMTX SemHandle;
HEV SemEventHandle;
string InFile;
string OutFile;



void threadA(void *X)
{
   string Temp;
   string FileName;
   less<string> Comp;
   ifstream In;
   ofstream Out;
   In.open(InFile.c_str());
   Out.open(OutFile.c_str());
   while(!In.eof())
   {
      In >> Temp;
      if(!In.eof()){
	  KeyWords.insert(Temp);
      }
   }
   In.close();
   DosWaitEventSem(SemEventHandle,SEM_INDEFINITE_WAIT);
   while(!TextFiles.empty())
   {
       DosRequestMutexSem(SemHandle,5000);
       FileName = TextFiles.front();
       TextFiles.pop();
       DosReleaseMutexSem(SemHandle);
       In.open(FileName.c_str());
       SearchWords.erase(SearchWords.begin(),SearchWords.end());
       while(!In.eof() && In.good())
       {
	   In >> Temp;
	   SearchWords.insert(Temp);
       }
       In.close();
       if(includes(SearchWords.begin(),SearchWords.end(),
	       KeyWords.begin(),KeyWords.end(),Comp)){
	  DosRequestMutexSem(SemHandle,5000);
	  cout << "Thread A match found in " << FileName << endl;
	  Out << FileName << endl;
	  DosReleaseMutexSem(SemHandle);
       }
   }

   Out.close();
}


void main(int argc, char *argv[])
{

  DIR *DirP;
  unsigned long Result = 0;
  struct dirent *EntryP;
  DirP = opendir(argv[1]);
  InFile = argv[2];
  OutFile = argv[3];
  if(argc == 4){
     string Temp;
     DosCreateMutexSem(NULL,&SemHandle,0,0);
     DosCreateEventSem(NULL,&SemEventHandle,0,0);
     Result =  _beginthread(threadA,8192,NULL);
     if(DirP == NULL){
	cerr << " Could Not Open " << argv[1] << endl;
	exit(1);
     }
     do{
	  EntryP = readdir(DirP);
	  if(EntryP){
	     Temp = EntryP->d_name;
	     if(Temp.contains(".TXT")){
		DosRequestMutexSem(SemHandle,5000);
		cout << "Found " << EntryP->d_name << " in Main Thread " << endl;
		TextFiles.push(EntryP->d_name);
		DosReleaseMutexSem(SemHandle);
		DosPostEventSem(SemEventHandle);
	     }
	  }
     }while(EntryP);
     closedir(DirP);
     DosWaitThread(&Result,DCWW_WAIT);
     DosCloseMutexSem(SemHandle);
  }

}