[13536] | 1 | #!/usr/bin/perl
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| 2 | # -*-Perl-*-
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| 3 |
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| 4 | #---
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| 5 | # $Id: shape_arabic.pl 13536 2006-12-20 20:47:58Z mdewsnip $
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| 6 | #
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| 7 | # ------------
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| 8 | # Description:
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| 9 | # ------------
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| 10 | # Perl script that does arabic utf-8 shaping
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| 11 | #
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| 12 | # - Note how easy shaping really is.
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| 13 | # - This should be used an a learning tool for those interested
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| 14 | # in Arabic and in perl (its a learning medium).
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| 15 | #
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| 16 | # -----------------
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| 17 | # Revision Details: (Updated by Revision Control System)
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| 18 | # -----------------
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| 19 | # $Date: 2006-12-20 20:47:58 +0000 (Wed, 20 Dec 2006) $
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| 20 | # $Author: mdewsnip $
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| 21 | # $Revision: 13536 $
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| 22 | # $Source$
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| 23 | #
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| 24 | # (www.arabeyes.org - under GPL license)
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| 25 | #---
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| 26 |
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| 27 | # Point to and use Perl version 5.8 (or greater)
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| 28 | use 5.8.0;
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| 29 |
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| 30 | # Try to be clean in variable usage, etc
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| 31 | use strict;
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| 32 |
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| 33 | # Enable full UTF-8 support
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| 34 | use utf8;
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| 35 | use open ':utf8';
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| 36 | binmode(STDOUT, ":utf8");
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| 37 |
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| 38 | # Enable Automatic command-line parsing
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| 39 | require "newgetopt.pl";
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| 40 |
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| 41 | my (
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| 42 | $this_script,
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| 43 | $opt_debug,
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| 44 | $opt_file,
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| 45 | $out_line,
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| 46 | );
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| 47 |
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| 48 | # Specify global variable values and init some Variables
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| 49 | $this_script = $0;
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| 50 | $this_script =~ s|^.*/([^/]*)|$1|;
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| 51 |
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| 52 | # Process the command line
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| 53 | &get_args();
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| 54 |
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| 55 | if (! $opt_file )
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| 56 | {
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| 57 | print "ERROR($this_script): Specify input file to process with '-file' option\n";
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| 58 | &usage(1);
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| 59 | }
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| 60 |
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| 61 | open (INFILE, "< $opt_file") or die "Can't open $opt_file - $! \n";
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| 62 |
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| 63 | while (<INFILE>)
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| 64 | {
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| 65 | $out_line .= &shape_line($_);
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| 66 | }
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| 67 | print $out_line;
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| 68 |
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| 69 | exit(0);
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| 70 |
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| 71 | ### ###
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| 72 | ######## Procedures ########
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| 73 | ### ###
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| 74 |
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| 75 | ##
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| 76 | # Do the actual Arabic Shaping
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| 77 | sub shape_line
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| 78 | {
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| 79 | my ($line) = @_;
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| 80 |
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| 81 | use constant ISOLATED => 0;
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| 82 | use constant INITIAL => 1;
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| 83 | use constant MEDIAL => 2;
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| 84 | use constant FINAL => 3;
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| 85 |
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| 86 | my (
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| 87 | @char,
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| 88 | $cur,
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| 89 | $prev,
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| 90 | $next,
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| 91 | $index,
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| 92 | $prev_index,
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| 93 | $next_index,
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| 94 | $out,
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| 95 | $str,
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| 96 | );
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| 97 |
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| 98 | # Hex values noted for all entries.
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| 99 | # iso-8859-6 => [ s, i, m, f]
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| 100 | my %map = (
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| 101 | "621" => ["FE80", 0, 0, 0], # HAMZA
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| 102 | "622" => ["FE81", 0, 0, "FE82"], # ALEF_MADDA
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| 103 | "623" => ["FE83", 0, 0, "FE84"], # ALEF_HAMZA_ABOVE
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| 104 | "624" => ["FE85", 0, 0, "FE86"], # WAW_HAMZA
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| 105 | "625" => ["FE87", 0, 0, "FE88"], # ALEF_HAMZA_BELOW
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| 106 | "626" => ["FE89", "FE8B", "FE8C", "FE8A"], # YEH_HAMZA
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| 107 | "627" => ["FE8D", 0, 0, "FE8E"], # ALEF
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| 108 | "628" => ["FE8F", "FE91", "FE92", "FE90"], # BEH
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| 109 | "629" => ["FE93", 0, 0, "FE94"], # TEH_MARBUTA
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| 110 | "62A" => ["FE95", "FE97", "FE98", "FE96"], # TEH
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| 111 | "62B" => ["FE99", "FE9B", "FE9C", "FE9A"], # THEH
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| 112 | "62C" => ["FE9D", "FE9F", "FEA0", "FE9E"], # JEEM
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| 113 | "62D" => ["FEA1", "FEA3", "FEA4", "FEA2"], # HAH
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| 114 | "62E" => ["FEA5", "FEA7", "FEA8", "FEA6"], # KHAH
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| 115 | "62F" => ["FEA9", 0, 0, "FEAA"], # DAL
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| 116 | "630" => ["FEAB", 0, 0, "FEAC"], # THAL
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| 117 | "631" => ["FEAD", 0, 0, "FEAE"], # REH
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| 118 | "632" => ["FEAF", 0, 0, "FEB0"], # ZAIN
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| 119 | "633" => ["FEB1", "FEB3", "FEB4", "FEB2"], # SEEN
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| 120 | "634" => ["FEB5", "FEB7", "FEB8", "FEB6"], # SHEEN
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| 121 | "635" => ["FEB9", "FEBB", "FEBC", "FEBA"], # SAD
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| 122 | "636" => ["FEBD", "FEBF", "FEC0", "FEBE"], # DAD
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| 123 | "637" => ["FEC1", "FEC3", "FEC4", "FEC2"], # TAH
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| 124 | "638" => ["FEC5", "FEC7", "FEC8", "FEC6"], # ZAH
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| 125 | "639" => ["FEC9", "FECB", "FECC", "FECA"], # AIN
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| 126 | "63A" => ["FECD", "FECF", "FED0", "FECE"], # GHAIN
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| 127 | "640" => [ "640", 0, 0, 0], # TATWEEL
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| 128 | "641" => ["FED1", "FED3", "FED4", "FED2"], # FEH
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| 129 | "642" => ["FED5", "FED7", "FED8", "FED6"], # QAF
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| 130 | "643" => ["FED9", "FEDB", "FEDC", "FEDA"], # KAF
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| 131 | "644" => ["FEDD", "FEDF", "FEE0", "FEDE"], # LAM
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| 132 | "645" => ["FEE1", "FEE3", "FEE4", "FEE2"], # MEEM
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| 133 | "646" => ["FEE5", "FEE7", "FEE8", "FEE6"], # NOON
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| 134 | "647" => ["FEE9", "FEEB", "FEEC", "FEEA"], # HEH
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| 135 | "648" => ["FEED", 0, 0, "FEEE"], # WAW
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| 136 | "649" => ["FEEF", 0, 0, "FEF0"], # ALEF_MAKSURA
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| 137 | "64A" => ["FEF1", "FEF3", "FEF4", "FEF2"], # YEH
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| 138 | # exceptions
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| 139 | "644622" => ["FEF5", 0, 0, "FEF6"], # LAM_ALEF_MADDA
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| 140 | "644623" => ["FEF7", 0, 0, "FEF8"], # LAM_ALEF_HAMZA_ABOVE
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| 141 | "644625" => ["FEF9", 0, 0, "FEFA"], # LAM_ALEF_HAMZA_BELOW
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| 142 | "644627" => ["FEFB", 0, 0, "FEFC"], # LAM_ALEF
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| 143 |
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| 144 | ## ---- My additions for Farsi ----
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| 145 | # I think there is a bug in this script which causes an initial "Peh"
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| 146 | # to be treated as isolated. This is why the isolated value for "Peh"
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| 147 | # is set to the initial value.
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| 148 | "67E" => [ "FB58", "FB58", "FB59", "FB57" ], # FARSI PEH
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| 149 | "686" => [ "FB7A", "FB7C", "FB7D", "FB7B" ], # FARSI TCHEH
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| 150 | "6AF" => [ "FB92", "FB94", "FB95", "FB93" ], # FARSI GAF
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| 151 | "6CC" => [ "FBFC", "FBFE", "FBFF", "FBFD" ], # FARSI YEH
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| 152 | );
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| 153 |
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| 154 | my %special_is_next = ( "640" => 1 );
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| 155 | my %special_is_comb1 = ( "644" => 1 );
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| 156 | my %special_is_comb2 = (
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| 157 | "622" => 1,
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| 158 | "623" => 1,
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| 159 | "625" => 1,
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| 160 | "627" => 1,
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| 161 | );
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| 162 |
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| 163 | my %special_is_composing = (
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| 164 | "64B" => 1, # FATHATAN
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| 165 | "64C" => 1, # DAMMATAN
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| 166 | "64D" => 1, # KASRATAN
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| 167 | "64E" => 1, # FATHA
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| 168 | "64F" => 1, # DAMMA
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| 169 | "650" => 1, # KASRA
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| 170 | "651" => 1, # SHADDA
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| 171 | "652" => 1, # SUKUN
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| 172 | "653" => 1, # MADDAH ABOVE
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| 173 | "654" => 1, # HAMZA ABOVE
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| 174 | "655" => 1, # HAMZA BELOW
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| 175 | "670" => 1, # SUPERSCRIPT ALEF
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| 176 | "6D6" => 1, # HIGH LIG. SAD WITH LAM WITH ALEF MAKSURA
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| 177 | "6D7" => 1, # HIGH LIG. QAF WITH LAM WITH ALEF MAKSURA
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| 178 | "6D8" => 1, # HIGH MEEM INITIAL FORM
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| 179 | "6D9" => 1, # HIGH LAM ALEF
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| 180 | "6DA" => 1, # HIGH JEEM
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| 181 | "6DB" => 1, # HIGH THREE DOTS
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| 182 | "6DC" => 1, # HIGH SEEN
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| 183 | # The 2 entires below should not be here - contact unicode.org !!
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| 184 | # "6DD" => 1, # END OF AYAH
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| 185 | # "6DE" => 1, # START OF RUB EL HIZB
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| 186 | "6DF" => 1, # HIGH ROUNDED ZERO
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| 187 | "6E0" => 1, # HIGH UPRIGHT RECTANGULAR ZERO
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| 188 | "6E1" => 1, # HIGH DOTLESS HEAD OF KHAH
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| 189 | "6E2" => 1, # HIGH MEEM ISOLATED FORM
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| 190 | "6E3" => 1, # LOW SEEN
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| 191 | "6E4" => 1, # HIGH MADDA
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| 192 | "6E7" => 1, # HIGH YEH
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| 193 | "6E8" => 1, # HIGH NOON
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| 194 | "6EA" => 1, # EMPTY CENTRE LOW STOP
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| 195 | "6EB" => 1, # EMPTY CENTRE HIGH STOP
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| 196 | "6EC" => 1, # HIGH STOP WITH FILLED CENTRE
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| 197 | "6ED" => 1, # LOW MEEM
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| 198 | );
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| 199 |
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| 200 | @char = split ("", $line);
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| 201 |
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| 202 | for ($index = 0; $index <= $#char; $index++)
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| 203 | {
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| 204 | $cur = unpack("U", $char[$index]);
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| 205 | $cur = sprintf "\U%x\E", $cur;
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| 206 | if ( $opt_debug )
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| 207 | {
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| 208 | print "---- $index ----\n";
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| 209 | print "NOW - $cur \n";
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| 210 | }
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| 211 | if ( defined $map{$cur} )
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| 212 | {
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| 213 | # Previous character status
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| 214 | $prev_index = $index;
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| 215 |
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| 216 | PREV_CHECK:
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| 217 | {
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| 218 | $prev_index--;
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| 219 | $prev = unpack("U", $char[$prev_index]);
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| 220 | $prev = sprintf "\U%x\E", $prev;
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| 221 | if ( $opt_debug )
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| 222 | {
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| 223 | print "prev - $prev \n";
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| 224 | }
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| 225 |
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| 226 | # Get rid of all previous composers
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| 227 | if ( $special_is_composing{$prev} )
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| 228 | {
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| 229 | redo PREV_CHECK;
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| 230 | }
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| 231 | }
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| 232 |
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| 233 | if (
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| 234 | ($index == 0) ||
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| 235 | !defined $map{$prev} ||
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| 236 | (!$map{$prev}[INITIAL] &&
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| 237 | !$map{$prev}[MEDIAL]
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| 238 | )
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| 239 | )
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| 240 | {
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| 241 | # Don't have a 'prev'
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| 242 | if ( $opt_debug )
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| 243 | {
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| 244 | print "prev not defined \n";
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| 245 | }
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| 246 | undef $prev;
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| 247 | }
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| 248 |
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| 249 | # Next character status
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| 250 | $next_index = $index;
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| 251 |
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| 252 | NEXT_CHECK:
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| 253 | {
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| 254 | $next_index++;
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| 255 | $next = unpack("U", $char[$next_index]);
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| 256 | $next = sprintf "\U%x\E", $next;
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| 257 | if ( $opt_debug )
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| 258 | {
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| 259 | print "next - $next \n";
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| 260 | }
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| 261 |
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| 262 | # Get rid of all next composers
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| 263 | if ( $special_is_composing{$next} )
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| 264 | {
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| 265 | redo NEXT_CHECK;
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| 266 | }
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| 267 | }
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| 268 |
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| 269 | if (
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| 270 | ($index == $#char) ||
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| 271 | !defined $map{$next} ||
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| 272 | (!$map{$next}[MEDIAL] &&
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| 273 | !$map{$next}[FINAL] &&
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| 274 | !$special_is_next{$next}
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| 275 | )
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| 276 | )
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| 277 | {
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| 278 | # Don't have a 'next'
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| 279 | if ( $opt_debug )
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| 280 | {
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| 281 | print "next not defined \n";
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| 282 | }
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| 283 | undef $next;
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| 284 | }
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| 285 |
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| 286 | # Shape the special combinational characters
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| 287 | if ( $special_is_comb1{$cur} )
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| 288 | {
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| 289 | if (defined $next )
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| 290 | {
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| 291 | if ( $special_is_comb2{$next} )
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| 292 | {
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| 293 | $out = ( (defined $prev) ? $map{"$cur$next"}[FINAL] : $map{"$cur$next"}[ISOLATED] );
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| 294 | $str .= pack("U", hex($out));
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| 295 | if ( $opt_debug )
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| 296 | {
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| 297 | print "Got me a complex - use $out ($str)\n";
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| 298 | }
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| 299 | $index++;
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| 300 | next;
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| 301 | }
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| 302 | }
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| 303 | }
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| 304 |
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| 305 | # Medial
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| 306 | if ( (defined $prev) && (defined $next) )
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| 307 | {
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| 308 | # In case there is no medial, move to next :-)
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| 309 | if ( $out = $map{$cur}[MEDIAL] )
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| 310 | {
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| 311 | $str .= pack("U", hex($out));
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| 312 | if ( $opt_debug )
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| 313 | {
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| 314 | print "Got prev & next - use $out ($str)\n";
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| 315 | }
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| 316 | next;
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| 317 | }
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| 318 | }
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| 319 |
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| 320 | # Final
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| 321 | if ( (defined $prev) )
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| 322 | {
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| 323 | if ( $out = $map{$cur}[FINAL] )
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| 324 | {
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| 325 | $str .= pack("U", hex($out));
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| 326 | if ( $opt_debug )
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| 327 | {
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| 328 | print "Got prev - use $out ($str)\n";
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| 329 | }
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| 330 | next;
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| 331 | }
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| 332 | }
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| 333 |
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| 334 | # Initial
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| 335 | if ( (defined $next) )
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| 336 | {
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| 337 | if ( $out = $map{$cur}[INITIAL] )
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| 338 | {
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| 339 | $str .= pack("U", hex($out));
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| 340 | if ( $opt_debug )
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| 341 | {
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| 342 | print "Got next - use $out ($str)\n";
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| 343 | }
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| 344 | next;
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| 345 | }
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| 346 | }
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| 347 |
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| 348 | # Isolated/Seperated (Stand-alone)
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| 349 | $out = $map{$cur}[ISOLATED];
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| 350 | $str .= pack("U", hex($out));
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| 351 | if ( $opt_debug )
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| 352 | {
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| 353 | print "Got nothing - use $out ($str)\n";
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| 354 | }
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| 355 | }
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| 356 | else
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| 357 | {
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| 358 | $str .= pack("U", hex($cur));
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| 359 | }
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| 360 | }
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| 361 |
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| 362 | if ( $opt_debug )
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| 363 | {
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| 364 | print "return - $str \n";
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| 365 | }
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| 366 | return ($str);
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| 367 | }
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| 368 |
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| 369 | ##
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| 370 | # Print the simple usage
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| 371 | sub usage
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| 372 | {
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| 373 | my ($die_after) = @_;
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| 374 |
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| 375 | print "Usage: $this_script <-file filename> [-debug] \n";
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| 376 | if ( $die_after ) { exit(5); }
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| 377 | }
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| 378 |
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| 379 | ##
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| 380 | # Get the command line arguments
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| 381 | sub get_args
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| 382 | {
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| 383 | &NGetOpt (
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| 384 | "debug" => \$opt_debug, # enable the printing of debug output
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| 385 | "file=s" => \$opt_file, # specify a filename to process
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| 386 | ) || ( $? = 257, die "Invalid argument\n" );
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| 387 | }
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