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1 | package utf8; |
2 | |
3 | my $DEBUG = 0; |
4 | my $seq = "AAA0000"; |
5 | |
6 | sub DESTROY {} |
7 | |
8 | sub croak { require Carp; Carp::croak(@_) } |
9 | |
10 | sub SWASHNEW { |
11 | my ($class, $type, $list, $minbits, $none) = @_; |
12 | local $^D = 0 if $^D; |
13 | print STDERR "SWASHNEW @_\n" if $DEBUG; |
14 | my $extras; |
15 | my $bits; |
16 | |
17 | if ($type and ref ${"${class}::{$type}"} eq $class) { |
18 | warn qq/Found \${"${class}::{$type}"}\n/ if $DEBUG; |
19 | return ${"${class}::{$type}"}; # Already there... |
20 | } |
21 | |
22 | $type ||= $seq++; |
23 | |
24 | my $caller; |
25 | my $i = 0; |
26 | while (($caller = caller($i)) eq __PACKAGE__) { $i++ } |
27 | my $encoding = $enc{$caller} || "unicode"; |
28 | (my $file = $type) =~ s!::!/!g; |
29 | $file =~ s#^(I[sn]|To)([A-Z].*)#$1/$2#; |
30 | $list ||= eval { $caller->$type(); } |
31 | || do "$file.pl" |
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32 | || do "$encoding/$file.pl" |
33 | || do "$encoding/Is/${type}.pl" |
34 | || croak("Can't find $encoding character property definition via $caller->$type or $file.pl"); |
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35 | |
36 | $| = 1; |
37 | |
38 | if ($list) { |
39 | my @tmp = split(/^/m, $list); |
40 | my %seen; |
41 | local $^W = 0; |
42 | $extras = join '', grep /^[^0-9a-fA-F]/, @tmp; |
43 | $list = join '', |
44 | sort { hex $a <=> hex $b } |
45 | grep {/^([0-9a-fA-F]+)/ and not $seen{$1}++} @tmp; # XXX doesn't do ranges right |
46 | } |
47 | |
48 | if ($none) { |
49 | my $hextra = sprintf "%04x", $none + 1; |
50 | $list =~ s/\tXXXX$/\t$hextra/mg; |
51 | } |
52 | |
53 | if ($minbits < 32) { |
54 | my $top = 0; |
55 | while ($list =~ /^([0-9a-fA-F]+)(?:\t([0-9a-fA-F]+)?)(?:\t([0-9a-fA-F]+))?/mg) { |
56 | my $min = hex $1; |
57 | my $max = hex(defined $2 ? $2 : $1); |
58 | my $val = hex(defined $3 ? $3 : ""); |
59 | $val += $max - $min if defined $3; |
60 | $top = $val if $val > $top; |
61 | } |
62 | $bits = |
63 | $top > 0xffff ? 32 : |
64 | $top > 0xff ? 16 : |
65 | $top > 1 ? 8 : 1 |
66 | } |
67 | $bits = $minbits if $bits < $minbits; |
68 | |
69 | my @extras; |
70 | for my $x ($extras) { |
71 | pos $x = 0; |
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72 | while ($x =~ /^([^0-9a-fA-F\n])(.*)/mg) { |
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73 | my $char = $1; |
74 | my $name = $2; |
75 | # print STDERR "$1 => $2\n" if $DEBUG; |
76 | if ($char =~ /[-+!]/) { |
77 | my ($c,$t) = split(/::/, $name, 2); # bogus use of ::, really |
78 | my $subobj = $c->SWASHNEW($t, "", 0, 0, 0); |
79 | push @extras, $name => $subobj; |
80 | $bits = $subobj->{BITS} if $bits < $subobj->{BITS}; |
81 | } |
82 | } |
83 | } |
84 | |
85 | print STDERR "CLASS = $class, TYPE => $type, BITS => $bits, NONE => $none\nEXTRAS =>\n$extras\nLIST =>\n$list\n" if $DEBUG; |
86 | |
87 | ${"${class}::{$type}"} = bless { |
88 | TYPE => $type, |
89 | BITS => $bits, |
90 | EXTRAS => $extras, |
91 | LIST => $list, |
92 | NONE => $none, |
93 | @extras, |
94 | } => $class; |
95 | } |
96 | |
97 | # NOTE: utf8.c:swash_init() assumes entries are never modified once generated. |
98 | |
99 | sub SWASHGET { |
100 | my ($self, $start, $len) = @_; |
101 | local $^D = 0 if $^D; |
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102 | my $type = $self->{TYPE}; |
103 | my $bits = $self->{BITS}; |
104 | my $none = $self->{NONE}; |
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105 | print STDERR "SWASHGET @_ [$type/$bits/$none]\n" if $DEBUG; |
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106 | my $end = $start + $len; |
107 | my $swatch = ""; |
108 | my $key; |
109 | vec($swatch, $len - 1, $bits) = 0; # Extend to correct length. |
110 | if ($none) { |
111 | for $key (0 .. $len - 1) { vec($swatch, $key, $bits) = $none } |
112 | } |
113 | |
114 | for ($self->{LIST}) { |
115 | pos $_ = 0; |
116 | if ($bits > 1) { |
117 | LINE: |
118 | while (/^([0-9a-fA-F]+)(?:\t([0-9a-fA-F]+)?)(?:\t([0-9a-fA-F]+))?/mg) { |
119 | my $min = hex $1; |
120 | my $max = (defined $2 ? hex $2 : $min); |
121 | my $val = hex $3; |
122 | next if $max < $start; |
123 | # print "$min $max $val\n"; |
124 | if ($none) { |
125 | if ($min < $start) { |
126 | $val += $start - $min; |
127 | $val = $none if $val > $none; |
128 | $min = $start; |
129 | } |
130 | for ($key = $min; $key <= $max; $key++) { |
131 | last LINE if $key >= $end; |
132 | # print STDERR "$key => $val\n" if $DEBUG; |
133 | vec($swatch, $key - $start, $bits) = $val; |
134 | ++$val if $val < $none; |
135 | } |
136 | } |
137 | else { |
138 | if ($min < $start) { |
139 | $val += $start - $min; |
140 | $min = $start; |
141 | } |
142 | for ($key = $min; $key <= $max; $key++, $val++) { |
143 | last LINE if $key >= $end; |
144 | # print STDERR "$key => $val\n" if $DEBUG; |
145 | vec($swatch, $key - $start, $bits) = $val; |
146 | } |
147 | } |
148 | } |
149 | } |
150 | else { |
151 | LINE: |
152 | while (/^([0-9a-fA-F]+)(?:\t([0-9a-fA-F]+))?/mg) { |
153 | my $min = hex $1; |
154 | my $max = (defined $2 ? hex $2 : $min); |
155 | next if $max < $start; |
156 | if ($min < $start) { |
157 | $min = $start; |
158 | } |
159 | for ($key = $min; $key <= $max; $key++) { |
160 | last LINE if $key >= $end; |
161 | # print STDERR "$key => 1\n" if $DEBUG; |
162 | vec($swatch, $key - $start, 1) = 1; |
163 | } |
164 | } |
165 | } |
166 | } |
167 | for my $x ($self->{EXTRAS}) { |
168 | pos $x = 0; |
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169 | while ($x =~ /^([-+!])(.*)/mg) { |
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170 | my $char = $1; |
171 | my $name = $2; |
172 | print STDERR "INDIRECT $1 $2\n" if $DEBUG; |
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173 | my $otherbits = $self->{$name}->{BITS}; |
174 | croak("SWASHGET size mismatch") if $bits < $otherbits; |
175 | my $other = $self->{$name}->SWASHGET($start, $len); |
176 | if ($char eq '+') { |
177 | if ($bits == 1 and $otherbits == 1) { |
178 | $swatch |= $other; |
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179 | } |
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180 | else { |
181 | for ($key = 0; $key < $len; $key++) { |
182 | vec($swatch, $key, $bits) = vec($other, $key, $otherbits); |
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183 | } |
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184 | } |
185 | } |
186 | elsif ($char eq '!') { |
187 | if ($bits == 1 and $otherbits == 1) { |
188 | $swatch |= ~$other; |
189 | } |
190 | else { |
191 | for ($key = 0; $key < $len; $key++) { |
192 | if (!vec($other, $key, $otherbits)) { |
193 | vec($swatch, $key, $bits) = 1; |
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194 | } |
195 | } |
196 | } |
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197 | } |
198 | elsif ($char eq '-') { |
199 | if ($bits == 1 and $otherbits == 1) { |
200 | $swatch &= ~$other; |
201 | } |
202 | else { |
203 | for ($key = 0; $key < $len; $key++) { |
204 | if (vec($other, $key, $otherbits)) { |
205 | vec($swatch, $key, $bits) = 0; |
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206 | } |
207 | } |
208 | } |
209 | } |
210 | } |
211 | } |
212 | if ($DEBUG) { |
213 | print STDERR "CELLS "; |
214 | for ($key = 0; $key < $len; $key++) { |
215 | print STDERR vec($swatch, $key, $bits), " "; |
216 | } |
217 | print STDERR "\n"; |
218 | } |
219 | $swatch; |
220 | } |
221 | |
222 | 1; |