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1 package Language::INTERCAL::Backend;
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2
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3 # Backends
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4
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5 # This file is part of CLC-INTERCAL
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6
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7 # Copyright (c) 2006-2008 Claudio Calvelli, all rights reserved.
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8
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9 # CLC-INTERCAL is copyrighted software. However, permission to use, modify,
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10 # and distribute it is granted provided that the conditions set out in the
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11 # licence agreement are met. See files README and COPYING in the distribution.
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12
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13 use strict;
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14 use vars qw($VERSION $PERVERSION);
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15 ($VERSION) = ($PERVERSION = "CLC-INTERCAL/Base INTERCAL/Backend.pm 1.-94.-2") =~ /\s(\S+)$/;
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16
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17 use Carp;
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18 use Language::INTERCAL::Exporter '1.-94.-2';
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19 use vars qw(@EXPORT @EXPORT_OK);
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20 @EXPORT = ();
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21 @EXPORT_OK = qw(backend generate_code);
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22
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23 my @backends = ();
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24 my %backends = ();
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25
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26 sub backend {
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27 @_ == 1 or croak "Usage: backend(BACKEND)";
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28 my ($backend) = @_;
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29 $backend =~ s/\s+//g;
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30 if ($backend =~ /^\d+$/) {
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31 return undef if $backend < 0 || $backend >= @backends;
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32 return $backend;
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33 } else {
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34 if (! exists $backends{$backend}) {
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35 eval "require Language::INTERCAL::Backend::$backend";
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36 return undef if $@;
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37 $backends{$backend} = @backends;
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38 push @backends, $backend;
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39 }
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40 $backend = $backends{$backend};
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41 return $backend;
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42 }
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43 }
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44
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45 sub generate_code {
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46 @_ == 6 or @_ == 7 or croak
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47 "Usage: generate_code(INTERPRETER, BACKEND, NAME, BASENAME, " .
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48 "FILESPEC, ORIG [,OPTIONS])";
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49 my ($int, $backend, $name, $basename, $filespec, $orig, $options) = @_;
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50 $options ||= {};
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51 my $verb = $options->{verbose};
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52 $backend = 'Language::INTERCAL::Backend::' . $backend;
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53 eval "require $backend"; die $@ if $@;
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54 my $suffix = $backend->default_suffix;
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55 my $mode = $backend->default_mode;
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56 my $handle = '';
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57 my $filename = undef;
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58 my %p = ('%' => '%', 'p' => $basename, 's' => $suffix, 'o' => $orig);
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59 if (defined $suffix) {
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60 $filename = $filespec;
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61 $filename =~ s/%([%ops])/$p{$1}/ge;
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62 &$verb($filename) if $verb;
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63 $handle = new Language::INTERCAL::GenericIO 'FILE', 'r', $filename;
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64 } else {
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65 &$verb('') if $verb;
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66 }
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67 $name =~ s/%([%ops])/$p{$1}/ge;
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68 $backend->generate($int, $name, $handle, $options);
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69 undef $handle;
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70 if (defined $filename && defined $mode) {
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71 chmod $mode & ~umask, $filename;
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72 }
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73 }
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74
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75 1;
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