/[VRac]/VRac.pm
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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revision 145 by dpavlin, Sun Aug 5 13:27:27 2007 UTC revision 158 by dpavlin, Sun Aug 5 17:59:29 2007 UTC
# Line 3  package VRac; Line 3  package VRac;
3  use warnings;  use warnings;
4  use strict;  use strict;
5    
6  use Carp qw/confess croak/;  use Carp qw/confess croak cluck carp/;
7  use File::Slurp;  use File::Slurp;
8  use Data::Dump qw/dump/;  use Data::Dump qw/dump/;
9    
# Line 29  Emulator of 8-bit architectures based on Line 29  Emulator of 8-bit architectures based on
29  This project is homage to 8-bit computers in Croatia and former Yugoslavia  This project is homage to 8-bit computers in Croatia and former Yugoslavia
30  from 1980-1990. Word B<vrac> means also I<wizard> in Croatian.  from 1980-1990. Word B<vrac> means also I<wizard> in Croatian.
31    
32    This project should enable anyone with limited knowledge of perl and 8-bit
33    arhitecture of some machine to write emulator in an afternoon. To achieve this,
34    code is written is as cleanly as possible.
35    
36    Porting existing emulators should be especially easy: you need passive
37    understaning of language in which emulator is written and you can be on your
38    way C<:-)>
39    
40  =cut  =cut
41    
42  =head1 FUNCTIONS  =head1 FUNCTIONS
# Line 193  sub append_to_file { Line 201  sub append_to_file {
201          my $path = shift || confess "no path?";          my $path = shift || confess "no path?";
202          my $bytes = join('', @_);          my $bytes = join('', @_);
203    
204            my $size = -s $path || 0;
205            my $len = length($bytes);
206    
207          open(my $fh, '>>', $path) || confess "can't open $path: $!";          open(my $fh, '>>', $path) || confess "can't open $path: $!";
208            print($fh $bytes);
209            my $pos = tell($fh);
210    
211            my $expected = $size + $len;
212            if ( $pos != $expected ) {
213                    cluck "BUG: file grows too big got $pos, expected $expected !";
214                    truncate $fh, $expected;
215            }
216    
217            close($fh);
218    
         print $fh $bytes;  
219          warn sprintf("## append_to_file('%s',%s)\n", $path, dump($bytes));          warn sprintf("## append_to_file('%s',%s)\n", $path, dump($bytes));
220  }  }
221    
# Line 346  __USAGE__ Line 366  __USAGE__
366    
367  =head1 SEE ALSO  =head1 SEE ALSO
368    
369  Components: L<M6502>, L<Z80>, L<Screen>, L<Tape>  Components: L<M6502>, L<Z80>, L<Screen>, L<Tape>, L<Session>
370    
371  Emulators: L<Orao>, L<Galaksija>  Emulators: L<Orao>, L<Galaksija>
372    
# Line 354  Emulators: L<Orao>, L<Galaksija> Line 374  Emulators: L<Orao>, L<Galaksija>
374    
375  Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >>  Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >>
376    
 =head1 BUGS  
   
377  =head1 ACKNOWLEDGEMENTS  =head1 ACKNOWLEDGEMENTS
378    
379    Structure and Interpretation of Computer Programs by Abelson, Sussman, and
380    Sussman L<http://mitpress.mit.edu/sicp/> is a great book. It gave me idea
381    that you should have wizard powers over your computer, even if it's 8 bit
382    one.
383    
384  =head1 COPYRIGHT & LICENSE  =head1 COPYRIGHT & LICENSE
385    
386  Copyright 2007 Dobrica Pavlinusic, All Rights Reserved.  Copyright 2007 Dobrica Pavlinusic, All Rights Reserved.
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