zeropad

   1 #!/usr/bin/env perl
   2
   3 #=======================================================================
   4 # zeropad
   5 # File ID: 7028de4a-f744-11dd-a3ac-000475e441b9
   6 #
   7 # Pads all integers read from stdin with zeros so they all have the same
   8 # length.
   9 #
  10 # Character set: UTF-8
  11 # ©opyleft 2008– Øyvind A. Holm <sunny@sunbase.org>
  12 # License: GNU General Public License version 2 or later, see end of
  13 # file for legal stuff.
  14 #=======================================================================
  15
  16 use strict;
  17 use warnings;
  18 use Getopt::Long;
  19
  20 local $| = 1;
  21
  22 our %Opt = (
  23
  24     'help' => 0,
  25     'hex' => 0,
  26     'quiet' => 0,
  27     'size' => 0,
  28     'verbose' => 0,
  29     'version' => 0,
  30
  31 );
  32
  33 our $progname = $0;
  34 $progname =~ s/^.*\/(.*?)$/$1/;
  35 our $VERSION = '0.1.1';
  36
  37 Getopt::Long::Configure('bundling');
  38 GetOptions(
  39
  40     'help|h' => \$Opt{'help'},
  41     'hex|x' => \$Opt{'hex'},
  42     'quiet|q+' => \$Opt{'quiet'},
  43     'size|s=i' => \$Opt{'size'},
  44     'verbose|v+' => \$Opt{'verbose'},
  45     'version' => \$Opt{'version'},
  46
  47 ) || die("$progname: Option error. Use -h for help.\n");
  48
  49 $Opt{'verbose'} -= $Opt{'quiet'};
  50 $Opt{'help'} && usage(0);
  51 if ($Opt{'version'}) {
  52     print_version();
  53     exit(0);
  54 }
  55
  56 my $max_length = 0;
  57
  58 exit(main());
  59
  60 sub main {
  61     # {{{
  62     my $Retval = 0;
  63
  64     my @Array = ();
  65
  66     my $DIGITS = $Opt{'hex'} ? '0-9A-Fa-f' : '0-9';
  67
  68     while (<>) {
  69         my $Line = $_;
  70         push(@Array, $Line);
  71         $Line =~ s/([$DIGITS]+)/check_max($1)/ge;
  72     }
  73
  74     for my $Curr (@Array) {
  75         $Curr =~ s/([$DIGITS]+)/pad_number($1)/ge;
  76         print($Curr);
  77     }
  78
  79     return $Retval;
  80     # }}}
  81 } # main()
  82
  83 sub check_max {
  84     # {{{
  85     my $Str = shift;
  86     if (length($Str) > $max_length) {
  87         $max_length = $Opt{'size'} ? $Opt{'size'} : length($Str);
  88     }
  89     return("");
  90     # }}}
  91 } # check_max()
  92
  93 sub pad_number {
  94     # {{{
  95     my $Num = shift;
  96     return $Num if ($max_length <= length($Num));
  97     return('0' x ($max_length - length($Num)) . $Num);
  98     # }}}
  99 } # pad_number()
 100
 101 sub print_version {
 102     # Print program version {{{
 103     print("$progname $VERSION\n");
 104     return;
 105     # }}}
 106 } # print_version()
 107
 108 sub usage {
 109     # Send the help message to stdout {{{
 110     my $Retval = shift;
 111
 112     if ($Opt{'verbose'}) {
 113         print("\n");
 114         print_version();
 115     }
 116     print(<<"END");
 117
 118 Usage: $progname [options] [file [files [...]]]
 119
 120 Pads all integers read from stdin with zeros so they all have the same
 121 length. I.e.: 1 5 12 156 1024 = 0001 0005 0012 0156 1024.
 122
 123 Options:
 124
 125   -h, --help
 126     Show this help.
 127   -q, --quiet
 128     Be more quiet. Can be repeated to increase silence.
 129   -s X, --size X
 130     Instead of padding to the size of the largest number, pad to a width
 131     of X digits.
 132   -v, --verbose
 133     Increase level of verbosity. Can be repeated.
 134   -x, --hex
 135     Include hexadecimal digits a-f and A-F.
 136   --version
 137     Print version information.
 138
 139 END
 140     exit($Retval);
 141     # }}}
 142 } # usage()
 143
 144 sub msg {
 145     # Print a status message to stderr based on verbosity level {{{
 146     my ($verbose_level, $Txt) = @_;
 147
 148     if ($Opt{'verbose'} >= $verbose_level) {
 149         print(STDERR "$progname: $Txt\n");
 150     }
 151     return;
 152     # }}}
 153 } # msg()
 154
 155 __END__
 156
 157 # This program is free software; you can redistribute it and/or modify
 158 # it under the terms of the GNU General Public License as published by
 159 # the Free Software Foundation; either version 2 of the License, or (at
 160 # your option) any later version.
 161 #
 162 # This program is distributed in the hope that it will be useful, but
 163 # WITHOUT ANY WARRANTY; without even the implied warranty of
 164 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 165 # See the GNU General Public License for more details.
 166 #
 167 # You should have received a copy of the GNU General Public License
 168 # along with this program.
 169 # If not, see L<http://www.gnu.org/licenses/>.
 170
 171 # vim: set fenc=UTF-8 ft=perl fdm=marker ts=4 sw=4 sts=4 et fo+=w :