ustr

   1 #!/usr/bin/env perl
   2
   3 #==============================================================================
   4 # ustr
   5 # File ID: 3c899bbc-5d49-11df-b62a-90e6ba3022ac
   6 #
   7 # Inserts a COMBINING LOW LINE (U+0332, "◌̲") after every character except
   8 # newline (\n).
   9 #
  10 # Character set: UTF-8
  11 # ©opyleft 2004– Øyvind A. Holm <sunny@sunbase.org>
  12 # License: GNU General Public License version 2 or later, see end of file for
  13 # legal stuff.
  14 #==============================================================================
  15
  16 use strict;
  17 use warnings;
  18 use utf8;
  19 use Getopt::Long;
  20 use open ':std', ':encoding(UTF-8)';
  21
  22 local $| = 1;
  23
  24 our %Opt = (
  25
  26     'delete' => 0,
  27     'help' => 0,
  28     'quiet' => 0,
  29     'space' => 0,
  30     'strikethrough' => 0,
  31     'verbose' => 0,
  32     'version' => 0,
  33
  34 );
  35
  36 our $progname = $0;
  37 $progname =~ s/^.*\/(.*?)$/$1/;
  38 our $VERSION = '0.3.1';
  39
  40 Getopt::Long::Configure('bundling');
  41 GetOptions(
  42
  43     'delete|d' => \$Opt{'delete'},
  44     'help|h' => \$Opt{'help'},
  45     'quiet|q+' => \$Opt{'quiet'},
  46     'space|S' => \$Opt{'space'},
  47     'strikethrough|s' => \$Opt{'strikethrough'},
  48     'verbose|v+' => \$Opt{'verbose'},
  49     'version' => \$Opt{'version'},
  50
  51 ) || die("$progname: Option error. Use -h for help.\n");
  52
  53 $Opt{'verbose'} -= $Opt{'quiet'};
  54 $Opt{'help'} && usage(0);
  55 if ($Opt{'version'}) {
  56     print_version();
  57     exit(0);
  58 }
  59
  60 exit(main());
  61
  62 sub main {
  63     my $Retval = 0;
  64     my $combchar = "\x{0332}";
  65     my $space = $Opt{'space'} ? "" : " ";
  66
  67     if ($Opt{'strikethrough'}) {
  68         $combchar = "\x{0336}";
  69     }
  70     if ($Opt{'delete'}) {
  71         while (<>) {
  72             s/$combchar//g;
  73             print;
  74         }
  75     } else {
  76         while (<>) {
  77             s/([^\x00-\x1F$space])/$1$combchar/g;
  78             print;
  79         }
  80     }
  81
  82     return $Retval;
  83 }
  84
  85 sub print_version {
  86     # Print program version
  87     print("$progname $VERSION\n");
  88     return;
  89 }
  90
  91 sub usage {
  92     # Send the help message to stdout
  93     my $Retval = shift;
  94
  95     if ($Opt{'verbose'}) {
  96         print("\n");
  97         print_version();
  98     }
  99     print(<<"END");
 100
 101 Usage: $progname [options] [file [files [...]]]
 102
 103 Options:
 104
 105   -h, --help
 106     Show this help.
 107   -q, --quiet
 108     Be more quiet. Can be repeated to increase silence.
 109   -s, --strikethrough
 110     Use strikethrough (U+0336, '1̶2̶3̶ a̶b̶c̶') instead of underline.
 111   -v, --verbose
 112     Increase level of verbosity. Can be repeated.
 113   -S, --space
 114     Also underline/overstrike space characters (U+0020).
 115   --version
 116     Print version information.
 117
 118 END
 119     exit($Retval);
 120 }
 121
 122 sub msg {
 123     # Print a status message to stderr based on verbosity level
 124     my ($verbose_level, $Txt) = @_;
 125
 126     $verbose_level > $Opt{'verbose'} && return;
 127     print(STDERR "$progname: $Txt\n");
 128     return;
 129 }
 130
 131 __END__
 132
 133 # This program is free software; you can redistribute it and/or modify it under
 134 # the terms of the GNU General Public License as published by the Free Software
 135 # Foundation; either version 2 of the License, or (at your option) any later
 136 # version.
 137 #
 138 # This program is distributed in the hope that it will be useful, but WITHOUT
 139 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 140 # FOR A PARTICULAR PURPOSE.
 141 # See the GNU General Public License for more details.
 142 #
 143 # You should have received a copy of the GNU General Public License along with
 144 # this program.
 145 # If not, see L<http://www.gnu.org/licenses/>.
 146
 147 # vim: set fenc=UTF-8 ft=perl fdm=marker ts=4 sw=4 sts=4 et fo+=w :