lib/perl5/5.6.1/utf8_heavy.pl

   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 "$file.pl"
  32         || do "$encoding/$file.pl"
  33         || do "$encoding/Is/${type}.pl"
  34         || croak("Can't find $encoding character property definition via $caller->$type or $file.pl");
  35
  36     $| = 1;
  37
  38     if ($list) {
  39         my @tmp = split(/^/m, $list);
  40         my %seen;
  41         no warnings;
  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 $x = 0;
  72         while ($x =~ /^([^0-9a-fA-F\n])(.*)/mg) {
  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;
 102     my $type = $self->{TYPE};
 103     my $bits = $self->{BITS};
 104     my $none = $self->{NONE};
 105     print STDERR "SWASHGET @_ [$type/$bits/$none]\n" if $DEBUG;
 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 if $val < $none;
 127                         $min = $start;
 128                     }
 129                     for ($key = $min; $key <= $max; $key++) {
 130                         last LINE if $key >= $end;
 131 #                       print STDERR "$key => $val\n" if $DEBUG;
 132                         vec($swatch, $key - $start, $bits) = $val;
 133                         ++$val if $val < $none;
 134                     }
 135                 }
 136                 else {
 137                     if ($min < $start) {
 138                         $val += $start - $min;
 139                         $min = $start;
 140                     }
 141                     for ($key = $min; $key <= $max; $key++, $val++) {
 142                         last LINE if $key >= $end;
 143 #                       print STDERR "$key => $val\n" if $DEBUG;
 144                         vec($swatch, $key - $start, $bits) = $val;
 145                     }
 146                 }
 147             }
 148         }
 149         else {
 150           LINE:
 151             while (/^([0-9a-fA-F]+)(?:\t([0-9a-fA-F]+))?/mg) {
 152                 my $min = hex $1;
 153                 my $max = (defined $2 ? hex $2 : $min);
 154                 next if $max < $start;
 155                 if ($min < $start) {
 156                     $min = $start;
 157                 }
 158                 for ($key = $min; $key <= $max; $key++) {
 159                     last LINE if $key >= $end;
 160 #                   print STDERR "$key => 1\n" if $DEBUG;
 161                     vec($swatch, $key - $start, 1) = 1;
 162                 }
 163             }
 164         }
 165     }
 166     for my $x ($self->{EXTRAS}) {
 167         pos $x = 0;
 168         while ($x =~ /^([-+!])(.*)/mg) {
 169             my $char = $1;
 170             my $name = $2;
 171             print STDERR "INDIRECT $1 $2\n" if $DEBUG;
 172             my $otherbits = $self->{$name}->{BITS};
 173             croak("SWASHGET size mismatch") if $bits < $otherbits;
 174             my $other = $self->{$name}->SWASHGET($start, $len);
 175             if ($char eq '+') {
 176                 if ($bits == 1 and $otherbits == 1) {
 177                     $swatch |= $other;
 178                 }
 179                 else {
 180                     for ($key = 0; $key < $len; $key++) {
 181                         vec($swatch, $key, $bits) = vec($other, $key, $otherbits);
 182                     }
 183                 }
 184             }
 185             elsif ($char eq '!') {
 186                 if ($bits == 1 and $otherbits == 1) {
 187                     $swatch |= ~$other;
 188                 }
 189                 else {
 190                     for ($key = 0; $key < $len; $key++) {
 191                         if (!vec($other, $key, $otherbits)) {
 192                             vec($swatch, $key, $bits) = 1;
 193                         }
 194                     }
 195                 }
 196             }
 197             elsif ($char eq '-') {
 198                 if ($bits == 1 and $otherbits == 1) {
 199                     $swatch &= ~$other;
 200                 }
 201                 else {
 202                     for ($key = 0; $key < $len; $key++) {
 203                         if (vec($other, $key, $otherbits)) {
 204                             vec($swatch, $key, $bits) = 0;
 205                         }
 206                     }
 207                 }
 208             }
 209         }
 210     }
 211     if ($DEBUG) {
 212         print STDERR "CELLS ";
 213         for ($key = 0; $key < $len; $key++) {
 214             print STDERR vec($swatch, $key, $bits), " ";
 215         }
 216         print STDERR "\n";
 217     }
 218     $swatch;
 219 }
 220
 221 1;