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1 package Language::INTERCAL::GenericIO::FILE;
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2
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3 # Write/read data from/to file
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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) = ($PERVERSION = "CLC-INTERCAL/Base INTERCAL/GenericIO/FILE.pm 1.-94.-2") =~ /\s(\S+)$/;
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16
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17 use Carp;
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18 use IO::File;
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19 use Language::INTERCAL::Exporter '1.-94.-2';
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20 use Language::INTERCAL::Splats '1.-94.-2', qw(:SP);
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21 use Language::INTERCAL::GenericIO '1.-94.-2';
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22 use vars qw(@ISA);
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23 @ISA = qw(Language::INTERCAL::GenericIO);
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24
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25 sub _new {
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26 @_ == 3 or croak
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27 "Usage: new Language::INTERCAL::GenericIO::FILE(MODE, NAME)";
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28 my ($object, $mode, $data) = @_;
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29 my $filemode = $mode;
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30 $filemode =~ tr/rw/wr/;
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31 $filemode = 'r+' if $filemode =~ /u/;
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32 $object->{filedata} = {};
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33 my $fh;
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34 if (ref $data && UNIVERSAL::isa($data, 'GLOB')) {
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35 $fh = $data;
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36 } elsif ($data eq '-' || $data eq '-1') {
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37 $fh = $mode =~ /r/ ? \*STDOUT : \*STDIN;
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38 } elsif ($data eq '-2') {
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39 $fh = \*STDERR;
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40 } else {
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41 $fh = new IO::File($data, $filemode) or faint(SP_IOERR, $data, $!);
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42 # $fh->autoflush(1);
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43 $object->{filedata}{to_close} = $fh;
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44 }
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45 $object->{filedata}{handle} = $fh;
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46 }
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47
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48 sub is_terminal {
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49 @_ == 1 or croak "Usage: IO->is_terminal";
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50 my ($object) = @_;
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51 -t $object->{filedata}{handle};
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52 }
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53
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54 sub read_binary {
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55 @_ == 2 or croak "Usage: IO->read_binary(DATA)";
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56 my ($object, $data) = @_;
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57 print { $object->{filedata}{handle} } $data
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58 or faint(SP_IOERR, $object->{data}[0], $!);
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59 }
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60
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61 sub _write_code {
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62 my ($object, $size) = @_;
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63 my $data = '';
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64 read $object->{filedata}{handle}, $data, $size;
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65 $data;
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66 }
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67
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68 sub _write_text_code {
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69 my ($object, $newline) = @_;
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70 local $/ = $newline;
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71 my $fh = $object->{filedata}{handle};
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72 my $data = <$fh>;
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73 defined $data ? $data : '';
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74 }
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75
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76 sub tell {
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77 @_ == 1 or croak "Usage: IO->tell";
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78 my ($object) = @_;
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79 tell($object->{filedata}{handle});
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80 }
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81
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82 sub reset {
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83 @_ == 1 or croak "Usage: IO->reset";
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84 my ($object) = @_;
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85 seek($object->{filedata}{handle}, 0, SEEK_SET);
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86 $object->{buffer} = '';
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87 $object;
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88 }
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89
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90 sub seek {
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91 @_ == 2 || @_ == 3
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92 or croak "Usage: IO->seek(POS [, RELATIVE_TO])";
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93 my ($object, $pos, $rel) = @_;
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94 $rel = SEEK_SET if ! defined $rel;
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95 seek($object->{filedata}{handle}, $pos, $rel);
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96 $object->{buffer} = '';
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97 $object;
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98 }
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99
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100 sub DESTROY {
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101 my ($object) = @_;
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102 $object->{filedata}{to_close} and $object->{filedata}{to_close}->close();
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103 }
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104
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105 1;
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