1 | package Unicode::UCD;
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2 |
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3 | use strict;
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4 | use warnings;
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5 |
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6 | our $VERSION = '0.24';
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7 |
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8 | use Storable qw(dclone);
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9 |
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10 | require Exporter;
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11 |
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12 | our @ISA = qw(Exporter);
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13 |
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14 | our @EXPORT_OK = qw(charinfo
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15 | charblock charscript
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16 | charblocks charscripts
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17 | charinrange
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18 | compexcl
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19 | casefold casespec
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20 | namedseq);
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21 |
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22 | use Carp;
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23 |
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24 | =head1 NAME
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25 |
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26 | Unicode::UCD - Unicode character database
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27 |
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28 | =head1 SYNOPSIS
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29 |
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30 | use Unicode::UCD 'charinfo';
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31 | my $charinfo = charinfo($codepoint);
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32 |
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33 | use Unicode::UCD 'charblock';
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34 | my $charblock = charblock($codepoint);
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35 |
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36 | use Unicode::UCD 'charscript';
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37 | my $charscript = charscript($codepoint);
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38 |
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39 | use Unicode::UCD 'charblocks';
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40 | my $charblocks = charblocks();
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41 |
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42 | use Unicode::UCD 'charscripts';
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43 | my %charscripts = charscripts();
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44 |
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45 | use Unicode::UCD qw(charscript charinrange);
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46 | my $range = charscript($script);
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47 | print "looks like $script\n" if charinrange($range, $codepoint);
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48 |
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49 | use Unicode::UCD 'compexcl';
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50 | my $compexcl = compexcl($codepoint);
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51 |
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52 | use Unicode::UCD 'namedseq';
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53 | my $namedseq = namedseq($named_sequence_name);
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54 |
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55 | my $unicode_version = Unicode::UCD::UnicodeVersion();
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56 |
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57 | =head1 DESCRIPTION
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58 |
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59 | The Unicode::UCD module offers a simple interface to the Unicode
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60 | Character Database.
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61 |
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62 | =cut
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63 |
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64 | my $UNICODEFH;
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65 | my $BLOCKSFH;
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66 | my $SCRIPTSFH;
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67 | my $VERSIONFH;
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68 | my $COMPEXCLFH;
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69 | my $CASEFOLDFH;
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70 | my $CASESPECFH;
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71 | my $NAMEDSEQFH;
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72 |
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73 | sub openunicode {
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74 | my ($rfh, @path) = @_;
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75 | my $f;
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76 | unless (defined $$rfh) {
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77 | for my $d (@INC) {
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78 | use File::Spec;
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79 | $f = File::Spec->catfile($d, "unicore", @path);
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80 | last if open($$rfh, $f);
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81 | undef $f;
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82 | }
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83 | croak __PACKAGE__, ": failed to find ",
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84 | File::Spec->catfile(@path), " in @INC"
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85 | unless defined $f;
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86 | }
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87 | return $f;
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88 | }
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89 |
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90 | =head2 charinfo
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91 |
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92 | use Unicode::UCD 'charinfo';
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93 |
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94 | my $charinfo = charinfo(0x41);
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95 |
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96 | charinfo() returns a reference to a hash that has the following fields
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97 | as defined by the Unicode standard:
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98 |
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99 | key
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100 |
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101 | code code point with at least four hexdigits
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102 | name name of the character IN UPPER CASE
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103 | category general category of the character
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104 | combining classes used in the Canonical Ordering Algorithm
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105 | bidi bidirectional category
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106 | decomposition character decomposition mapping
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107 | decimal if decimal digit this is the integer numeric value
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108 | digit if digit this is the numeric value
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109 | numeric if numeric is the integer or rational numeric value
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110 | mirrored if mirrored in bidirectional text
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111 | unicode10 Unicode 1.0 name if existed and different
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112 | comment ISO 10646 comment field
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113 | upper uppercase equivalent mapping
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114 | lower lowercase equivalent mapping
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115 | title titlecase equivalent mapping
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116 |
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117 | block block the character belongs to (used in \p{In...})
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118 | script script the character belongs to
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119 |
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120 | If no match is found, a reference to an empty hash is returned.
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121 |
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122 | The C<block> property is the same as returned by charinfo(). It is
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123 | not defined in the Unicode Character Database proper (Chapter 4 of the
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124 | Unicode 3.0 Standard, aka TUS3) but instead in an auxiliary database
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125 | (Chapter 14 of TUS3). Similarly for the C<script> property.
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126 |
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127 | Note that you cannot do (de)composition and casing based solely on the
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128 | above C<decomposition> and C<lower>, C<upper>, C<title>, properties,
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129 | you will need also the compexcl(), casefold(), and casespec() functions.
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130 |
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131 | =cut
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132 |
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133 | # NB: This function is duplicated in charnames.pm
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134 | sub _getcode {
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135 | my $arg = shift;
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136 |
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137 | if ($arg =~ /^[1-9]\d*$/) {
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138 | return $arg;
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139 | } elsif ($arg =~ /^(?:[Uu]\+|0[xX])?([[:xdigit:]]+)$/) {
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140 | return hex($1);
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141 | }
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142 |
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143 | return;
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144 | }
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145 |
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146 | # Lingua::KO::Hangul::Util not part of the standard distribution
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147 | # but it will be used if available.
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148 |
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149 | eval { require Lingua::KO::Hangul::Util };
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150 | my $hasHangulUtil = ! $@;
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151 | if ($hasHangulUtil) {
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152 | Lingua::KO::Hangul::Util->import();
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153 | }
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154 |
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155 | sub hangul_decomp { # internal: called from charinfo
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156 | if ($hasHangulUtil) {
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157 | my @tmp = decomposeHangul(shift);
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158 | return sprintf("%04X %04X", @tmp) if @tmp == 2;
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159 | return sprintf("%04X %04X %04X", @tmp) if @tmp == 3;
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160 | }
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161 | return;
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162 | }
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163 |
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164 | sub hangul_charname { # internal: called from charinfo
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165 | return sprintf("HANGUL SYLLABLE-%04X", shift);
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166 | }
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167 |
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168 | sub han_charname { # internal: called from charinfo
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169 | return sprintf("CJK UNIFIED IDEOGRAPH-%04X", shift);
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170 | }
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171 |
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172 | my @CharinfoRanges = (
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173 | # block name
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174 | # [ first, last, coderef to name, coderef to decompose ],
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175 | # CJK Ideographs Extension A
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176 | [ 0x3400, 0x4DB5, \&han_charname, undef ],
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177 | # CJK Ideographs
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178 | [ 0x4E00, 0x9FA5, \&han_charname, undef ],
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179 | # Hangul Syllables
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180 | [ 0xAC00, 0xD7A3, $hasHangulUtil ? \&getHangulName : \&hangul_charname, \&hangul_decomp ],
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181 | # Non-Private Use High Surrogates
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182 | [ 0xD800, 0xDB7F, undef, undef ],
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183 | # Private Use High Surrogates
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184 | [ 0xDB80, 0xDBFF, undef, undef ],
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185 | # Low Surrogates
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186 | [ 0xDC00, 0xDFFF, undef, undef ],
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187 | # The Private Use Area
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188 | [ 0xE000, 0xF8FF, undef, undef ],
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189 | # CJK Ideographs Extension B
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190 | [ 0x20000, 0x2A6D6, \&han_charname, undef ],
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191 | # Plane 15 Private Use Area
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192 | [ 0xF0000, 0xFFFFD, undef, undef ],
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193 | # Plane 16 Private Use Area
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194 | [ 0x100000, 0x10FFFD, undef, undef ],
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195 | );
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196 |
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197 | sub charinfo {
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198 | my $arg = shift;
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199 | my $code = _getcode($arg);
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200 | croak __PACKAGE__, "::charinfo: unknown code '$arg'"
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201 | unless defined $code;
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202 | my $hexk = sprintf("%06X", $code);
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203 | my($rcode,$rname,$rdec);
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204 | foreach my $range (@CharinfoRanges){
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205 | if ($range->[0] <= $code && $code <= $range->[1]) {
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206 | $rcode = $hexk;
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207 | $rcode =~ s/^0+//;
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208 | $rcode = sprintf("%04X", hex($rcode));
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209 | $rname = $range->[2] ? $range->[2]->($code) : '';
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210 | $rdec = $range->[3] ? $range->[3]->($code) : '';
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211 | $hexk = sprintf("%06X", $range->[0]); # replace by the first
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212 | last;
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213 | }
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214 | }
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215 | openunicode(\$UNICODEFH, "UnicodeData.txt");
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216 | if (defined $UNICODEFH) {
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217 | use Search::Dict 1.02;
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218 | if (look($UNICODEFH, "$hexk;", { xfrm => sub { $_[0] =~ /^([^;]+);(.+)/; sprintf "%06X;$2", hex($1) } } ) >= 0) {
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219 | my $line = <$UNICODEFH>;
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220 | return unless defined $line;
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221 | chomp $line;
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222 | my %prop;
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223 | @prop{qw(
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224 | code name category
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225 | combining bidi decomposition
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226 | decimal digit numeric
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227 | mirrored unicode10 comment
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228 | upper lower title
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229 | )} = split(/;/, $line, -1);
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230 | $hexk =~ s/^0+//;
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231 | $hexk = sprintf("%04X", hex($hexk));
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232 | if ($prop{code} eq $hexk) {
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233 | $prop{block} = charblock($code);
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234 | $prop{script} = charscript($code);
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235 | if(defined $rname){
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236 | $prop{code} = $rcode;
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237 | $prop{name} = $rname;
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238 | $prop{decomposition} = $rdec;
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239 | }
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240 | return \%prop;
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241 | }
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242 | }
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243 | }
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244 | return;
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245 | }
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246 |
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247 | sub _search { # Binary search in a [[lo,hi,prop],[...],...] table.
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248 | my ($table, $lo, $hi, $code) = @_;
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249 |
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250 | return if $lo > $hi;
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251 |
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252 | my $mid = int(($lo+$hi) / 2);
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253 |
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254 | if ($table->[$mid]->[0] < $code) {
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255 | if ($table->[$mid]->[1] >= $code) {
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256 | return $table->[$mid]->[2];
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257 | } else {
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258 | _search($table, $mid + 1, $hi, $code);
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259 | }
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260 | } elsif ($table->[$mid]->[0] > $code) {
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261 | _search($table, $lo, $mid - 1, $code);
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262 | } else {
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263 | return $table->[$mid]->[2];
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264 | }
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265 | }
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266 |
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267 | sub charinrange {
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268 | my ($range, $arg) = @_;
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269 | my $code = _getcode($arg);
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270 | croak __PACKAGE__, "::charinrange: unknown code '$arg'"
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271 | unless defined $code;
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272 | _search($range, 0, $#$range, $code);
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273 | }
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274 |
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275 | =head2 charblock
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276 |
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277 | use Unicode::UCD 'charblock';
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278 |
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279 | my $charblock = charblock(0x41);
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280 | my $charblock = charblock(1234);
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281 | my $charblock = charblock("0x263a");
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282 | my $charblock = charblock("U+263a");
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283 |
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284 | my $range = charblock('Armenian');
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285 |
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286 | With a B<code point argument> charblock() returns the I<block> the character
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287 | belongs to, e.g. C<Basic Latin>. Note that not all the character
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288 | positions within all blocks are defined.
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289 |
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290 | See also L</Blocks versus Scripts>.
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291 |
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292 | If supplied with an argument that can't be a code point, charblock() tries
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293 | to do the opposite and interpret the argument as a character block. The
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294 | return value is a I<range>: an anonymous list of lists that contain
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295 | I<start-of-range>, I<end-of-range> code point pairs. You can test whether
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296 | a code point is in a range using the L</charinrange> function. If the
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297 | argument is not a known character block, C<undef> is returned.
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298 |
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299 | =cut
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300 |
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301 | my @BLOCKS;
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302 | my %BLOCKS;
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303 |
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304 | sub _charblocks {
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305 | unless (@BLOCKS) {
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306 | if (openunicode(\$BLOCKSFH, "Blocks.txt")) {
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307 | local $_;
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308 | while (<$BLOCKSFH>) {
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309 | if (/^([0-9A-F]+)\.\.([0-9A-F]+);\s+(.+)/) {
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310 | my ($lo, $hi) = (hex($1), hex($2));
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311 | my $subrange = [ $lo, $hi, $3 ];
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312 | push @BLOCKS, $subrange;
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313 | push @{$BLOCKS{$3}}, $subrange;
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314 | }
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315 | }
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316 | close($BLOCKSFH);
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317 | }
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318 | }
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319 | }
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320 |
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321 | sub charblock {
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322 | my $arg = shift;
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323 |
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324 | _charblocks() unless @BLOCKS;
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325 |
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326 | my $code = _getcode($arg);
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327 |
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328 | if (defined $code) {
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329 | _search(\@BLOCKS, 0, $#BLOCKS, $code);
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330 | } else {
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331 | if (exists $BLOCKS{$arg}) {
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332 | return dclone $BLOCKS{$arg};
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333 | } else {
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334 | return;
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335 | }
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336 | }
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337 | }
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338 |
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339 | =head2 charscript
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340 |
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341 | use Unicode::UCD 'charscript';
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342 |
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343 | my $charscript = charscript(0x41);
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344 | my $charscript = charscript(1234);
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345 | my $charscript = charscript("U+263a");
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346 |
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347 | my $range = charscript('Thai');
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348 |
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349 | With a B<code point argument> charscript() returns the I<script> the
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350 | character belongs to, e.g. C<Latin>, C<Greek>, C<Han>.
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351 |
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352 | See also L</Blocks versus Scripts>.
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353 |
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354 | If supplied with an argument that can't be a code point, charscript() tries
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355 | to do the opposite and interpret the argument as a character script. The
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356 | return value is a I<range>: an anonymous list of lists that contain
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357 | I<start-of-range>, I<end-of-range> code point pairs. You can test whether a
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358 | code point is in a range using the L</charinrange> function. If the
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359 | argument is not a known character script, C<undef> is returned.
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360 |
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361 | =cut
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362 |
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363 | my @SCRIPTS;
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364 | my %SCRIPTS;
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365 |
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366 | sub _charscripts {
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367 | unless (@SCRIPTS) {
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368 | if (openunicode(\$SCRIPTSFH, "Scripts.txt")) {
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369 | local $_;
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370 | while (<$SCRIPTSFH>) {
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371 | if (/^([0-9A-F]+)(?:\.\.([0-9A-F]+))?\s+;\s+(\w+)/) {
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372 | my ($lo, $hi) = (hex($1), $2 ? hex($2) : hex($1));
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373 | my $script = lc($3);
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374 | $script =~ s/\b(\w)/uc($1)/ge;
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375 | my $subrange = [ $lo, $hi, $script ];
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376 | push @SCRIPTS, $subrange;
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377 | push @{$SCRIPTS{$script}}, $subrange;
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378 | }
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379 | }
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380 | close($SCRIPTSFH);
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381 | @SCRIPTS = sort { $a->[0] <=> $b->[0] } @SCRIPTS;
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382 | }
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383 | }
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384 | }
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385 |
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386 | sub charscript {
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387 | my $arg = shift;
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388 |
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389 | _charscripts() unless @SCRIPTS;
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390 |
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391 | my $code = _getcode($arg);
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392 |
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393 | if (defined $code) {
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394 | _search(\@SCRIPTS, 0, $#SCRIPTS, $code);
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395 | } else {
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396 | if (exists $SCRIPTS{$arg}) {
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397 | return dclone $SCRIPTS{$arg};
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398 | } else {
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399 | return;
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400 | }
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401 | }
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402 | }
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403 |
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404 | =head2 charblocks
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405 |
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406 | use Unicode::UCD 'charblocks';
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407 |
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408 | my $charblocks = charblocks();
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409 |
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410 | charblocks() returns a reference to a hash with the known block names
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411 | as the keys, and the code point ranges (see L</charblock>) as the values.
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412 |
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413 | See also L</Blocks versus Scripts>.
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414 |
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415 | =cut
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416 |
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417 | sub charblocks {
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418 | _charblocks() unless %BLOCKS;
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419 | return dclone \%BLOCKS;
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420 | }
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421 |
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422 | =head2 charscripts
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423 |
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424 | use Unicode::UCD 'charscripts';
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425 |
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426 | my %charscripts = charscripts();
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427 |
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428 | charscripts() returns a hash with the known script names as the keys,
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429 | and the code point ranges (see L</charscript>) as the values.
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430 |
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431 | See also L</Blocks versus Scripts>.
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432 |
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433 | =cut
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434 |
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435 | sub charscripts {
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436 | _charscripts() unless %SCRIPTS;
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437 | return dclone \%SCRIPTS;
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438 | }
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439 |
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440 | =head2 Blocks versus Scripts
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441 |
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442 | The difference between a block and a script is that scripts are closer
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443 | to the linguistic notion of a set of characters required to present
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444 | languages, while block is more of an artifact of the Unicode character
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445 | numbering and separation into blocks of (mostly) 256 characters.
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446 |
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447 | For example the Latin B<script> is spread over several B<blocks>, such
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448 | as C<Basic Latin>, C<Latin 1 Supplement>, C<Latin Extended-A>, and
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449 | C<Latin Extended-B>. On the other hand, the Latin script does not
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450 | contain all the characters of the C<Basic Latin> block (also known as
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451 | the ASCII): it includes only the letters, and not, for example, the digits
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452 | or the punctuation.
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453 |
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454 | For blocks see http://www.unicode.org/Public/UNIDATA/Blocks.txt
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455 |
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456 | For scripts see UTR #24: http://www.unicode.org/unicode/reports/tr24/
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457 |
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458 | =head2 Matching Scripts and Blocks
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459 |
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460 | Scripts are matched with the regular-expression construct
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461 | C<\p{...}> (e.g. C<\p{Tibetan}> matches characters of the Tibetan script),
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462 | while C<\p{In...}> is used for blocks (e.g. C<\p{InTibetan}> matches
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463 | any of the 256 code points in the Tibetan block).
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464 |
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465 | =head2 Code Point Arguments
|
---|
466 |
|
---|
467 | A I<code point argument> is either a decimal or a hexadecimal scalar
|
---|
468 | designating a Unicode character, or C<U+> followed by hexadecimals
|
---|
469 | designating a Unicode character. In other words, if you want a code
|
---|
470 | point to be interpreted as a hexadecimal number, you must prefix it
|
---|
471 | with either C<0x> or C<U+>, because a string like e.g. C<123> will
|
---|
472 | be interpreted as a decimal code point. Also note that Unicode is
|
---|
473 | B<not> limited to 16 bits (the number of Unicode characters is
|
---|
474 | open-ended, in theory unlimited): you may have more than 4 hexdigits.
|
---|
475 |
|
---|
476 | =head2 charinrange
|
---|
477 |
|
---|
478 | In addition to using the C<\p{In...}> and C<\P{In...}> constructs, you
|
---|
479 | can also test whether a code point is in the I<range> as returned by
|
---|
480 | L</charblock> and L</charscript> or as the values of the hash returned
|
---|
481 | by L</charblocks> and L</charscripts> by using charinrange():
|
---|
482 |
|
---|
483 | use Unicode::UCD qw(charscript charinrange);
|
---|
484 |
|
---|
485 | $range = charscript('Hiragana');
|
---|
486 | print "looks like hiragana\n" if charinrange($range, $codepoint);
|
---|
487 |
|
---|
488 | =cut
|
---|
489 |
|
---|
490 | =head2 compexcl
|
---|
491 |
|
---|
492 | use Unicode::UCD 'compexcl';
|
---|
493 |
|
---|
494 | my $compexcl = compexcl("09dc");
|
---|
495 |
|
---|
496 | The compexcl() returns the composition exclusion (that is, if the
|
---|
497 | character should not be produced during a precomposition) of the
|
---|
498 | character specified by a B<code point argument>.
|
---|
499 |
|
---|
500 | If there is a composition exclusion for the character, true is
|
---|
501 | returned. Otherwise, false is returned.
|
---|
502 |
|
---|
503 | =cut
|
---|
504 |
|
---|
505 | my %COMPEXCL;
|
---|
506 |
|
---|
507 | sub _compexcl {
|
---|
508 | unless (%COMPEXCL) {
|
---|
509 | if (openunicode(\$COMPEXCLFH, "CompositionExclusions.txt")) {
|
---|
510 | local $_;
|
---|
511 | while (<$COMPEXCLFH>) {
|
---|
512 | if (/^([0-9A-F]+)\s+\#\s+/) {
|
---|
513 | my $code = hex($1);
|
---|
514 | $COMPEXCL{$code} = undef;
|
---|
515 | }
|
---|
516 | }
|
---|
517 | close($COMPEXCLFH);
|
---|
518 | }
|
---|
519 | }
|
---|
520 | }
|
---|
521 |
|
---|
522 | sub compexcl {
|
---|
523 | my $arg = shift;
|
---|
524 | my $code = _getcode($arg);
|
---|
525 | croak __PACKAGE__, "::compexcl: unknown code '$arg'"
|
---|
526 | unless defined $code;
|
---|
527 |
|
---|
528 | _compexcl() unless %COMPEXCL;
|
---|
529 |
|
---|
530 | return exists $COMPEXCL{$code};
|
---|
531 | }
|
---|
532 |
|
---|
533 | =head2 casefold
|
---|
534 |
|
---|
535 | use Unicode::UCD 'casefold';
|
---|
536 |
|
---|
537 | my $casefold = casefold("00DF");
|
---|
538 |
|
---|
539 | The casefold() returns the locale-independent case folding of the
|
---|
540 | character specified by a B<code point argument>.
|
---|
541 |
|
---|
542 | If there is a case folding for that character, a reference to a hash
|
---|
543 | with the following fields is returned:
|
---|
544 |
|
---|
545 | key
|
---|
546 |
|
---|
547 | code code point with at least four hexdigits
|
---|
548 | status "C", "F", "S", or "I"
|
---|
549 | mapping one or more codes separated by spaces
|
---|
550 |
|
---|
551 | The meaning of the I<status> is as follows:
|
---|
552 |
|
---|
553 | C common case folding, common mappings shared
|
---|
554 | by both simple and full mappings
|
---|
555 | F full case folding, mappings that cause strings
|
---|
556 | to grow in length. Multiple characters are separated
|
---|
557 | by spaces
|
---|
558 | S simple case folding, mappings to single characters
|
---|
559 | where different from F
|
---|
560 | I special case for dotted uppercase I and
|
---|
561 | dotless lowercase i
|
---|
562 | - If this mapping is included, the result is
|
---|
563 | case-insensitive, but dotless and dotted I's
|
---|
564 | are not distinguished
|
---|
565 | - If this mapping is excluded, the result is not
|
---|
566 | fully case-insensitive, but dotless and dotted
|
---|
567 | I's are distinguished
|
---|
568 |
|
---|
569 | If there is no case folding for that character, C<undef> is returned.
|
---|
570 |
|
---|
571 | For more information about case mappings see
|
---|
572 | http://www.unicode.org/unicode/reports/tr21/
|
---|
573 |
|
---|
574 | =cut
|
---|
575 |
|
---|
576 | my %CASEFOLD;
|
---|
577 |
|
---|
578 | sub _casefold {
|
---|
579 | unless (%CASEFOLD) {
|
---|
580 | if (openunicode(\$CASEFOLDFH, "CaseFolding.txt")) {
|
---|
581 | local $_;
|
---|
582 | while (<$CASEFOLDFH>) {
|
---|
583 | if (/^([0-9A-F]+); ([CFSI]); ([0-9A-F]+(?: [0-9A-F]+)*);/) {
|
---|
584 | my $code = hex($1);
|
---|
585 | $CASEFOLD{$code} = { code => $1,
|
---|
586 | status => $2,
|
---|
587 | mapping => $3 };
|
---|
588 | }
|
---|
589 | }
|
---|
590 | close($CASEFOLDFH);
|
---|
591 | }
|
---|
592 | }
|
---|
593 | }
|
---|
594 |
|
---|
595 | sub casefold {
|
---|
596 | my $arg = shift;
|
---|
597 | my $code = _getcode($arg);
|
---|
598 | croak __PACKAGE__, "::casefold: unknown code '$arg'"
|
---|
599 | unless defined $code;
|
---|
600 |
|
---|
601 | _casefold() unless %CASEFOLD;
|
---|
602 |
|
---|
603 | return $CASEFOLD{$code};
|
---|
604 | }
|
---|
605 |
|
---|
606 | =head2 casespec
|
---|
607 |
|
---|
608 | use Unicode::UCD 'casespec';
|
---|
609 |
|
---|
610 | my $casespec = casespec("FB00");
|
---|
611 |
|
---|
612 | The casespec() returns the potentially locale-dependent case mapping
|
---|
613 | of the character specified by a B<code point argument>. The mapping
|
---|
614 | may change the length of the string (which the basic Unicode case
|
---|
615 | mappings as returned by charinfo() never do).
|
---|
616 |
|
---|
617 | If there is a case folding for that character, a reference to a hash
|
---|
618 | with the following fields is returned:
|
---|
619 |
|
---|
620 | key
|
---|
621 |
|
---|
622 | code code point with at least four hexdigits
|
---|
623 | lower lowercase
|
---|
624 | title titlecase
|
---|
625 | upper uppercase
|
---|
626 | condition condition list (may be undef)
|
---|
627 |
|
---|
628 | The C<condition> is optional. Where present, it consists of one or
|
---|
629 | more I<locales> or I<contexts>, separated by spaces (other than as
|
---|
630 | used to separate elements, spaces are to be ignored). A condition
|
---|
631 | list overrides the normal behavior if all of the listed conditions are
|
---|
632 | true. Case distinctions in the condition list are not significant.
|
---|
633 | Conditions preceded by "NON_" represent the negation of the condition.
|
---|
634 |
|
---|
635 | Note that when there are multiple case folding definitions for a
|
---|
636 | single code point because of different locales, the value returned by
|
---|
637 | casespec() is a hash reference which has the locales as the keys and
|
---|
638 | hash references as described above as the values.
|
---|
639 |
|
---|
640 | A I<locale> is defined as a 2-letter ISO 3166 country code, possibly
|
---|
641 | followed by a "_" and a 2-letter ISO language code (possibly followed
|
---|
642 | by a "_" and a variant code). You can find the lists of those codes,
|
---|
643 | see L<Locale::Country> and L<Locale::Language>.
|
---|
644 |
|
---|
645 | A I<context> is one of the following choices:
|
---|
646 |
|
---|
647 | FINAL The letter is not followed by a letter of
|
---|
648 | general category L (e.g. Ll, Lt, Lu, Lm, or Lo)
|
---|
649 | MODERN The mapping is only used for modern text
|
---|
650 | AFTER_i The last base character was "i" (U+0069)
|
---|
651 |
|
---|
652 | For more information about case mappings see
|
---|
653 | http://www.unicode.org/unicode/reports/tr21/
|
---|
654 |
|
---|
655 | =cut
|
---|
656 |
|
---|
657 | my %CASESPEC;
|
---|
658 |
|
---|
659 | sub _casespec {
|
---|
660 | unless (%CASESPEC) {
|
---|
661 | if (openunicode(\$CASESPECFH, "SpecialCasing.txt")) {
|
---|
662 | local $_;
|
---|
663 | while (<$CASESPECFH>) {
|
---|
664 | if (/^([0-9A-F]+); ([0-9A-F]+(?: [0-9A-F]+)*)?; ([0-9A-F]+(?: [0-9A-F]+)*)?; ([0-9A-F]+(?: [0-9A-F]+)*)?; (\w+(?: \w+)*)?/) {
|
---|
665 | my ($hexcode, $lower, $title, $upper, $condition) =
|
---|
666 | ($1, $2, $3, $4, $5);
|
---|
667 | my $code = hex($hexcode);
|
---|
668 | if (exists $CASESPEC{$code}) {
|
---|
669 | if (exists $CASESPEC{$code}->{code}) {
|
---|
670 | my ($oldlower,
|
---|
671 | $oldtitle,
|
---|
672 | $oldupper,
|
---|
673 | $oldcondition) =
|
---|
674 | @{$CASESPEC{$code}}{qw(lower
|
---|
675 | title
|
---|
676 | upper
|
---|
677 | condition)};
|
---|
678 | if (defined $oldcondition) {
|
---|
679 | my ($oldlocale) =
|
---|
680 | ($oldcondition =~ /^([a-z][a-z](?:_\S+)?)/);
|
---|
681 | delete $CASESPEC{$code};
|
---|
682 | $CASESPEC{$code}->{$oldlocale} =
|
---|
683 | { code => $hexcode,
|
---|
684 | lower => $oldlower,
|
---|
685 | title => $oldtitle,
|
---|
686 | upper => $oldupper,
|
---|
687 | condition => $oldcondition };
|
---|
688 | }
|
---|
689 | }
|
---|
690 | my ($locale) =
|
---|
691 | ($condition =~ /^([a-z][a-z](?:_\S+)?)/);
|
---|
692 | $CASESPEC{$code}->{$locale} =
|
---|
693 | { code => $hexcode,
|
---|
694 | lower => $lower,
|
---|
695 | title => $title,
|
---|
696 | upper => $upper,
|
---|
697 | condition => $condition };
|
---|
698 | } else {
|
---|
699 | $CASESPEC{$code} =
|
---|
700 | { code => $hexcode,
|
---|
701 | lower => $lower,
|
---|
702 | title => $title,
|
---|
703 | upper => $upper,
|
---|
704 | condition => $condition };
|
---|
705 | }
|
---|
706 | }
|
---|
707 | }
|
---|
708 | close($CASESPECFH);
|
---|
709 | }
|
---|
710 | }
|
---|
711 | }
|
---|
712 |
|
---|
713 | sub casespec {
|
---|
714 | my $arg = shift;
|
---|
715 | my $code = _getcode($arg);
|
---|
716 | croak __PACKAGE__, "::casespec: unknown code '$arg'"
|
---|
717 | unless defined $code;
|
---|
718 |
|
---|
719 | _casespec() unless %CASESPEC;
|
---|
720 |
|
---|
721 | return ref $CASESPEC{$code} ? dclone $CASESPEC{$code} : $CASESPEC{$code};
|
---|
722 | }
|
---|
723 |
|
---|
724 | =head2 namedseq()
|
---|
725 |
|
---|
726 | use Unicode::UCD 'namedseq';
|
---|
727 |
|
---|
728 | my $namedseq = namedseq("KATAKANA LETTER AINU P");
|
---|
729 | my @namedseq = namedseq("KATAKANA LETTER AINU P");
|
---|
730 | my %namedseq = namedseq();
|
---|
731 |
|
---|
732 | If used with a single argument in a scalar context, returns the string
|
---|
733 | consisting of the code points of the named sequence, or C<undef> if no
|
---|
734 | named sequence by that name exists. If used with a single argument in
|
---|
735 | a list context, returns list of the code points. If used with no
|
---|
736 | arguments in a list context, returns a hash with the names of the
|
---|
737 | named sequences as the keys and the named sequences as strings as
|
---|
738 | the values. Otherwise, returns C<undef> or empty list depending
|
---|
739 | on the context.
|
---|
740 |
|
---|
741 | (New from Unicode 4.1.0)
|
---|
742 |
|
---|
743 | =cut
|
---|
744 |
|
---|
745 | my %NAMEDSEQ;
|
---|
746 |
|
---|
747 | sub _namedseq {
|
---|
748 | unless (%NAMEDSEQ) {
|
---|
749 | if (openunicode(\$NAMEDSEQFH, "NamedSequences.txt")) {
|
---|
750 | local $_;
|
---|
751 | while (<$NAMEDSEQFH>) {
|
---|
752 | if (/^(.+)\s*;\s*([0-9A-F]+(?: [0-9A-F]+)*)$/) {
|
---|
753 | my ($n, $s) = ($1, $2);
|
---|
754 | my @s = map { chr(hex($_)) } split(' ', $s);
|
---|
755 | $NAMEDSEQ{$n} = join("", @s);
|
---|
756 | }
|
---|
757 | }
|
---|
758 | close($NAMEDSEQFH);
|
---|
759 | }
|
---|
760 | }
|
---|
761 | }
|
---|
762 |
|
---|
763 | sub namedseq {
|
---|
764 | _namedseq() unless %NAMEDSEQ;
|
---|
765 | my $wantarray = wantarray();
|
---|
766 | if (defined $wantarray) {
|
---|
767 | if ($wantarray) {
|
---|
768 | if (@_ == 0) {
|
---|
769 | return %NAMEDSEQ;
|
---|
770 | } elsif (@_ == 1) {
|
---|
771 | my $s = $NAMEDSEQ{ $_[0] };
|
---|
772 | return defined $s ? map { ord($_) } split('', $s) : ();
|
---|
773 | }
|
---|
774 | } elsif (@_ == 1) {
|
---|
775 | return $NAMEDSEQ{ $_[0] };
|
---|
776 | }
|
---|
777 | }
|
---|
778 | return;
|
---|
779 | }
|
---|
780 |
|
---|
781 | =head2 Unicode::UCD::UnicodeVersion
|
---|
782 |
|
---|
783 | Unicode::UCD::UnicodeVersion() returns the version of the Unicode
|
---|
784 | Character Database, in other words, the version of the Unicode
|
---|
785 | standard the database implements. The version is a string
|
---|
786 | of numbers delimited by dots (C<'.'>).
|
---|
787 |
|
---|
788 | =cut
|
---|
789 |
|
---|
790 | my $UNICODEVERSION;
|
---|
791 |
|
---|
792 | sub UnicodeVersion {
|
---|
793 | unless (defined $UNICODEVERSION) {
|
---|
794 | openunicode(\$VERSIONFH, "version");
|
---|
795 | chomp($UNICODEVERSION = <$VERSIONFH>);
|
---|
796 | close($VERSIONFH);
|
---|
797 | croak __PACKAGE__, "::VERSION: strange version '$UNICODEVERSION'"
|
---|
798 | unless $UNICODEVERSION =~ /^\d+(?:\.\d+)+$/;
|
---|
799 | }
|
---|
800 | return $UNICODEVERSION;
|
---|
801 | }
|
---|
802 |
|
---|
803 | =head2 Implementation Note
|
---|
804 |
|
---|
805 | The first use of charinfo() opens a read-only filehandle to the Unicode
|
---|
806 | Character Database (the database is included in the Perl distribution).
|
---|
807 | The filehandle is then kept open for further queries. In other words,
|
---|
808 | if you are wondering where one of your filehandles went, that's where.
|
---|
809 |
|
---|
810 | =head1 BUGS
|
---|
811 |
|
---|
812 | Does not yet support EBCDIC platforms.
|
---|
813 |
|
---|
814 | =head1 AUTHOR
|
---|
815 |
|
---|
816 | Jarkko Hietaniemi
|
---|
817 |
|
---|
818 | =cut
|
---|
819 |
|
---|
820 | 1;
|
---|