116 lines
3.2 KiB
C++
Executable File
116 lines
3.2 KiB
C++
Executable File
//
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// EX10CON.CPP
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//
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// C++/DOS Example program for ArchiveLib 2.0
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//
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// Copyright (c) Greenleaf Software, Inc. 1994 - 1996
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// All Rights Reserved
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//
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// MEMBERS/FUNCTIONS DEMONSTRATED
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//
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//
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// DESCRIPTION
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//
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// This example program is used to show off some of the pattern
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// matching functions. It is sort of a baby grep, able to look
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// through any list of files for a particular string. The format
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// you pass on the command line is:
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//
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// EX10DOS pattern wild-card
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//
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// You can omit wild-card, or wild-card and pattern, in which case
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// the defaults of "new" and "*.CPP" will be used.
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//
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// REVISION HISTORY
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//
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// February 1, 1996 2.0A : Second release
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//
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//
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#include <fstream.h>
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#include "al.h"
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#include "_match.h"
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#include <conio.h>
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void scan( char *name, char *pattern );
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int main( int argc, char *argv[] )
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{
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cout << "Archive Library 2.0\nEX10CON.CPP\n\n";
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cout << "This example program is used to show off some of the pattern\n";
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cout << "matching functions. It is sort of a baby grep, able to look\n";
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cout << "through any list of files for a particular string. The format\n";
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cout << "you pass on the command line is:\n";
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cout << "\n";
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cout << " EX10CON pattern wild-card\n";
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cout << "\n";
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cout << "You can omit wild-card, or wild-card and pattern, in which case\n";
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cout << "the defaults of 'new' and '*.CPP' will be used.\n\n";
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getch();
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//
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// The first part of the program just sets up the arguments, then
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// calls a couple of the match diagnostic functions.
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//
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char *names = "*.CPP";
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char *pattern = "new";
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if ( argc > 1 )
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pattern = argv[ 1 ];
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if ( argc > 2 )
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names = argv[ 2 ];
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cout << "Pattern : " << pattern << "\n";
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int error_type;
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cout << "contains wild characters: "
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<< is_pattern( pattern )
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<< "\n";
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cout << "Is valid: "
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<< is_valid_pattern( pattern, &error_type )
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<< "\n";
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if ( matche( "[A-", "test" ) != MATCH_PATTERN )
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cout << "Logic error in match engine\n";
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cout << "Hit any key to continue..." << flush;
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getch();
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cout << endl;
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//
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// The second part of the program creates an extended pattern, which
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// should look like this: "*pattern*". We are going to search for
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// that search pattern in each line of each file. The file names are
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// expanded one by one, and the scanner subroutine is called.
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//
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char *extended_pattern = new char[ strlen( pattern ) + 2 ];
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strcpy( extended_pattern, "*" );
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strcat( extended_pattern, pattern );
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strcat( extended_pattern, "*" );
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ALWildCardExpander *machine = new ALWildCardExpander( names );
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char *name;
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while ( ( name = machine->GetNextFile() ) != 0 )
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scan( name, extended_pattern );
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delete machine;
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return 1;
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}
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//
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// This routine reads in a line at a time from the specified file. It
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// tests each line for a match to the pattern. Any matches are printed out,
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// and that is that.
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//
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void scan( char *name, char *pattern )
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{
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char buffer[ 133 ];
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int line_number = 0;
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ifstream input;
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input.open( name );
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do {
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input.getline( buffer, 133 );
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line_number++;
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if ( match( pattern, buffer ) ) {
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cout << name << " " << line_number << ":" << buffer << "\n";
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}
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} while ( !input.eof() );
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}
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