//
// EX10CON.CPP
//
//  C++/DOS Example program for ArchiveLib 2.0
//
//  Copyright (c) Greenleaf Software, Inc. 1994 - 1996
//  All Rights Reserved
//
// MEMBERS/FUNCTIONS DEMONSTRATED
//
//
// DESCRIPTION
//
//  This example program is used to show off some of the pattern
//  matching functions.  It is sort of a baby grep, able to look
//  through any list of files for a particular string.  The format
//  you pass on the command line is:
//
//     EX10DOS pattern wild-card
//
//  You can omit wild-card, or wild-card and pattern, in which case
//  the defaults of "new" and "*.CPP" will be used.
//
// REVISION HISTORY
//
//  February 1, 1996  2.0A  : Second release
//
//

#include <fstream.h>
#include "al.h"
#include "_match.h"
#include <conio.h>

void scan( char *name, char *pattern );

int main( int argc, char *argv[] )
{
 cout << "Archive Library 2.0\nEX10CON.CPP\n\n";
 cout << "This example program is used to show off some of the pattern\n";
 cout << "matching functions.  It is sort of a baby grep, able to look\n";
 cout << "through any list of files for a particular string.  The format\n";
 cout << "you pass on the command line is:\n";
 cout << "\n";
 cout << "   EX10CON pattern wild-card\n";
 cout << "\n";
 cout << "You can omit wild-card, or wild-card and pattern, in which case\n";
 cout << "the defaults of 'new' and '*.CPP' will be used.\n\n";
 getch();

//
// The first part of the program just sets up the arguments, then
// calls a couple of the match diagnostic functions.
//

 char *names = "*.CPP";
 char *pattern = "new";
 if ( argc > 1 )
     pattern = argv[ 1 ];
 if ( argc > 2 )
     names = argv[ 2 ];
 cout << "Pattern : " << pattern << "\n";
 int error_type;
 cout << "contains wild characters: "
      << is_pattern( pattern )
      << "\n";
 cout << "Is valid: "
      << is_valid_pattern( pattern, &error_type )
      << "\n";
 if ( matche( "[A-", "test" ) != MATCH_PATTERN )
     cout << "Logic error in match engine\n";
 cout << "Hit any key to continue..." << flush;
 getch();
 cout << endl;

//
// The second part of the program creates an extended pattern, which
// should look like this:  "*pattern*".  We are going to search for
// that search pattern in each line of each file.  The file names are
// expanded one by one, and the scanner subroutine is called.
//

 char *extended_pattern = new char[ strlen( pattern ) + 2 ];
 strcpy( extended_pattern, "*" );
 strcat( extended_pattern, pattern );
 strcat( extended_pattern, "*" );
 ALWildCardExpander *machine = new ALWildCardExpander( names );
 char *name;
 while ( ( name = machine->GetNextFile() ) != 0 )
     scan( name, extended_pattern );
 delete machine;
 return 1;
}

//
// This routine reads in a line at a time from the specified file. It
// tests each line for a match to the pattern.  Any matches are printed out,
// and that is that.
//

void scan( char *name, char *pattern )
{
 char buffer[ 133 ];
 int line_number = 0;

 ifstream input;
 input.open( name );
 do {
     input.getline( buffer, 133 );
     line_number++;
     if ( match( pattern, buffer ) ) {
         cout << name << " " << line_number << ":" << buffer << "\n";
     }
 } while ( !input.eof() );
}