X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/71d929cb3e130a6486f59d4312ce76d7d6eea647..78325d7a7e6183fba46cbfb1dbd40def2996b940:/lib/utf8_heavy.pl diff --git a/lib/utf8_heavy.pl b/lib/utf8_heavy.pl index 0cc71f4..08d901f 100644 --- a/lib/utf8_heavy.pl +++ b/lib/utf8_heavy.pl @@ -1,291 +1,632 @@ package utf8; +use strict; +use warnings; sub DEBUG () { 0 } +$|=1 if DEBUG; sub DESTROY {} +my %Cache; + sub croak { require Carp; Carp::croak(@_) } -sub SWASHNEW { - my ($class, $type, $list, $minbits, $none) = @_; - local $^D = 0 if $^D; +sub _loose_name ($) { + # Given a lowercase property or property-value name, return its + # standardized version that is expected for look-up in the 'loose' hashes + # in Heavy.pl (hence, this depends on what mktables does). This squeezes + # out blanks, underscores and dashes. The complication stems from the + # grandfathered-in 'L_', which retains a single trailing underscore. - print STDERR "SWASHNEW @_\n" if DEBUG; + my $loose = $_[0] =~ s/[-\s_]//rg; - if ($type and ref ${"${class}::{$type}"} eq $class) { - warn qq/Found \${"${class}::{$type}"}\n/ if DEBUG; - return ${"${class}::{$type}"}; # Already there... - } + return $loose if $loose !~ / ^ (?: is | to )? l $/x; + return 'l_' if $_[0] =~ / l .* _ /x; # If original had a trailing '_' + return $loose; +} - if ($type) { - $type =~ s/^\s+//; - $type =~ s/\s+$//; - - print "type = $type\n" if DEBUG; - - my $file; - - unless (defined $file) { - defined %utf8::Is || do "unicore/Is.pl"; - if ($type =~ /^(?:Is|Category\s*=\s*)?[- _]?([A-Z].*)$/i) { - my $istype = $1; - print "istype = $istype\n" if DEBUG; - unless ($list = do "unicore/Is/$istype.pl") { - if (exists $utf8::Is{$istype}) { - $file = "unicore/Is/$utf8::Is{$istype}"; - } else { - my $isprefix = substr(lc($istype), 0, 2); - print "isprefix = $isprefix\n" if DEBUG; - if (exists $utf8::IsPat{$isprefix}) { - my $Is = $istype; - print "isprefix = $isprefix, Is = $Is\n" if DEBUG; - for my $k (keys %{$utf8::IsPat{$isprefix}}) { - print "isprefix = $isprefix, Is = $Is, k = $k\n" if DEBUG; - if ($Is =~ /^$k$/i) { - $file = "unicore/Is/$utf8::IsPat{$isprefix}->{$k}"; - print "isprefix = $isprefix, Is = $Is, k = $k, file = $file\n" if DEBUG; - last; - } - } - } - } - } - } - - unless (defined $file) { - defined %utf8::In || do "unicore/In.pl"; - $type = 'Lampersand' if $type =~ /^(?:Is)?L&$/; - if ($type =~ /^(In|(?:Script|Block)\s*=\s*)?[- _]?(?!herited$)(.+)/i) { - my $incat = $1; - my $intype = $2; - print "incat = $incat, intype = $intype\n" if DEBUG; - if (exists $utf8::In{$intype}) { - $file = "unicore/In/$utf8::In{$intype}"; - } else { - my $inprefix = substr(lc($intype), 0, 2); - print "inprefix = $inprefix\n" if DEBUG; - if (exists $utf8::InPat{$inprefix}) { - my $In = $intype; - print "inprefix = $inprefix, In = $In\n" if DEBUG; - for my $k (keys %{$utf8::InPat{$inprefix}}) { - print "inprefix = $inprefix, In = $In, k = $k\n" if DEBUG; - if ($In =~ /^$k$/i) { - my $i = $utf8::InPat{$inprefix}->{$k}; - print "inprefix = $inprefix, In = $In, k = $k, i = $i\n" if DEBUG; - next if $incat =~ /^S/ && - !exists $utf8::InScript{$i}; - next if $incat =~ /^B/ && - !exists $utf8::InBlock{$i}; - $file = "unicore/In/$i"; - print "inprefix = $inprefix, In = $In, k = $k, file = $file\n" if DEBUG; - last; - } - } - } - } - } - } - - unless (defined $file) { - if ($type =~ /^To([A-Z][A-Za-z]+)$/) { - $file = "unicore/To/$1"; - } - } - } - - if (defined $file) { - $list = do "$file.pl"; - } - - croak("Can't find Unicode character property \"$type\"") - unless $list; - } +## +## "SWASH" == "SWATCH HASH". A "swatch" is a swatch of the Unicode landscape. +## It's a data structure that encodes a set of Unicode characters. +## - my $extras; - my $bits; - - if ($list) { - my @tmp = split(/^/m, $list); - my %seen; - no warnings; - $extras = join '', grep /^[^0-9a-fA-F]/, @tmp; - $list = join '', - sort { hex $a <=> hex $b } - grep {/^([0-9a-fA-F]+)/ and not $seen{$1}++} @tmp; # XXX doesn't do ranges right - } +{ + # If a floating point number is within this distance from the value of a + # fraction, it is considered to be that fraction, even if many more digits + # are specified that don't exactly match. + my $min_floating_slop; - if ($none) { - my $hextra = sprintf "%04x", $none + 1; - $list =~ s/\tXXXX$/\t$hextra/mg; - } + # To guard against this program calling something that in turn ends up + # calling this program with the same inputs, and hence infinitely + # recursing, we keep a stack of the properties that are currently in + # progress, pushed upon entry, popped upon return. + my @recursed; - if ($minbits < 32) { - my $top = 0; - while ($list =~ /^([0-9a-fA-F]+)(?:\t([0-9a-fA-F]+)?)(?:\t([0-9a-fA-F]+))?/mg) { - my $min = hex $1; - my $max = hex(defined $2 ? $2 : $1); - my $val = hex(defined $3 ? $3 : ""); - $val += $max - $min if defined $3; - $top = $val if $val > $top; - } - $bits = - $top > 0xffff ? 32 : - $top > 0xff ? 16 : - $top > 1 ? 8 : 1 - } - $bits = $minbits if $bits < $minbits; - - my @extras; - for my $x ($extras) { - pos $x = 0; - while ($x =~ /^([^0-9a-fA-F\n])(.*)/mg) { - my $char = $1; - my $name = $2; - print STDERR "$1 => $2\n" if DEBUG; - if ($char =~ /[-+!]/) { - my ($c,$t) = split(/::/, $name, 2); # bogus use of ::, really - my $subobj = $c->SWASHNEW($t, "", 0, 0, 0); - push @extras, $name => $subobj; - $bits = $subobj->{BITS} if $bits < $subobj->{BITS}; - } - } - } + sub SWASHNEW { + my ($class, $type, $list, $minbits, $none) = @_; + my $user_defined = 0; + local $^D = 0 if $^D; - print STDERR "CLASS = $class, TYPE => $type, BITS => $bits, NONE => $none\nEXTRAS =>\n$extras\nLIST =>\n$list\n" if DEBUG; + $class = "" unless defined $class; + print STDERR __LINE__, ": class=$class, type=$type, list=", + (defined $list) ? $list : ':undef:', + ", minbits=$minbits, none=$none\n" if DEBUG; - ${"${class}::{$type}"} = bless { - TYPE => $type, - BITS => $bits, - EXTRAS => $extras, - LIST => $list, - NONE => $none, - @extras, - } => $class; -} + ## + ## Get the list of codepoints for the type. + ## Called from swash_init (see utf8.c) or SWASHNEW itself. + ## + ## Callers of swash_init: + ## op.c:pmtrans -- for tr/// and y/// + ## regexec.c:regclass_swash -- for /[]/, \p, and \P + ## utf8.c:is_utf8_common -- for common Unicode properties + ## utf8.c:to_utf8_case -- for lc, uc, ucfirst, etc. and //i + ## Unicode::UCD::prop_invlist + ## Unicode::UCD::prop_invmap + ## + ## Given a $type, our goal is to fill $list with the set of codepoint + ## ranges. If $type is false, $list passed is used. + ## + ## $minbits: + ## For binary properties, $minbits must be 1. + ## For character mappings (case and transliteration), $minbits must + ## be a number except 1. + ## + ## $list (or that filled according to $type): + ## Refer to perlunicode.pod, "User-Defined Character Properties." + ## + ## For binary properties, only characters with the property value + ## of True should be listed. The 3rd column, if any, will be ignored + ## + ## $none is undocumented, so I'm (khw) trying to do some documentation + ## of it now. It appears to be if there is a mapping in an input file + ## that maps to 'XXXX', then that is replaced by $none+1, expressed in + ## hexadecimal. It is used somehow in tr///. + ## + ## To make the parsing of $type clear, this code takes the a rather + ## unorthodox approach of last'ing out of the block once we have the + ## info we need. Were this to be a subroutine, the 'last' would just + ## be a 'return'. + ## + # If a problem is found $type is returned; + # Upon success, a new (or cached) blessed object is returned with + # keys TYPE, BITS, EXTRAS, LIST, and NONE with values having the + # same meanings as the input parameters. + # SPECIALS contains a reference to any special-treatment hash in the + # INVERT_IT is non-zero if the result should be inverted before use + # USER_DEFINED is non-zero if the result came from a user-defined + # property. + my $file; ## file to load data from, and also part of the %Cache key. + my $ListSorted = 0; -# NOTE: utf8.c:swash_init() assumes entries are never modified once generated. - -sub SWASHGET { - # See utf8.c:Perl_swash_fetch for problems with this interface. - my ($self, $start, $len) = @_; - local $^D = 0 if $^D; - my $type = $self->{TYPE}; - my $bits = $self->{BITS}; - my $none = $self->{NONE}; - print STDERR "SWASHGET @_ [$type/$bits/$none]\n" if DEBUG; - my $end = $start + $len; - my $swatch = ""; - my $key; - vec($swatch, $len - 1, $bits) = 0; # Extend to correct length. - if ($none) { - for $key (0 .. $len - 1) { vec($swatch, $key, $bits) = $none } - } + # Change this to get a different set of Unicode tables + my $unicore_dir = 'unicore'; + my $invert_it = 0; - for ($self->{LIST}) { - pos $_ = 0; - if ($bits > 1) { - LINE: - while (/^([0-9a-fA-F]+)(?:\t([0-9a-fA-F]+)?)(?:\t([0-9a-fA-F]+))?/mg) { - my $min = hex $1; - my $max = (defined $2 ? hex $2 : $min); - my $val = hex $3; - next if $max < $start; - print "$min $max $val\n" if DEBUG; - if ($none) { - if ($min < $start) { - $val += $start - $min if $val < $none; - $min = $start; - } - for ($key = $min; $key <= $max; $key++) { - last LINE if $key >= $end; - print STDERR "$key => $val\n" if DEBUG; - vec($swatch, $key - $start, $bits) = $val; - ++$val if $val < $none; - } - } - else { - if ($min < $start) { - $val += $start - $min; - $min = $start; - } - for ($key = $min; $key <= $max; $key++, $val++) { - last LINE if $key >= $end; - print STDERR "$key => $val\n" if DEBUG; - vec($swatch, $key - $start, $bits) = $val; - } - } - } - } - else { - LINE: - while (/^([0-9a-fA-F]+)(?:\t([0-9a-fA-F]+))?/mg) { - my $min = hex $1; - my $max = (defined $2 ? hex $2 : $min); - next if $max < $start; - if ($min < $start) { - $min = $start; - } - for ($key = $min; $key <= $max; $key++) { - last LINE if $key >= $end; - print STDERR "$key => 1\n" if DEBUG; - vec($swatch, $key - $start, 1) = 1; - } - } - } - } - for my $x ($self->{EXTRAS}) { - pos $x = 0; - while ($x =~ /^([-+!])(.*)/mg) { - my $char = $1; - my $name = $2; - print STDERR "INDIRECT $1 $2\n" if DEBUG; - my $otherbits = $self->{$name}->{BITS}; - croak("SWASHGET size mismatch") if $bits < $otherbits; - my $other = $self->{$name}->SWASHGET($start, $len); - if ($char eq '+') { - if ($bits == 1 and $otherbits == 1) { - $swatch |= $other; - } - else { - for ($key = 0; $key < $len; $key++) { - vec($swatch, $key, $bits) = vec($other, $key, $otherbits); - } - } - } - elsif ($char eq '!') { - if ($bits == 1 and $otherbits == 1) { - $swatch |= ~$other; - } - else { - for ($key = 0; $key < $len; $key++) { - if (!vec($other, $key, $otherbits)) { - vec($swatch, $key, $bits) = 1; - } - } - } - } - elsif ($char eq '-') { - if ($bits == 1 and $otherbits == 1) { - $swatch &= ~$other; - } - else { - for ($key = 0; $key < $len; $key++) { - if (vec($other, $key, $otherbits)) { - vec($swatch, $key, $bits) = 0; - } - } - } - } - } - } - if (DEBUG) { - print STDERR "CELLS "; - for ($key = 0; $key < $len; $key++) { - print STDERR vec($swatch, $key, $bits), " "; - } - print STDERR "\n"; + if ($type) + { + + # Verify that this isn't a recursive call for this property. + # Can't use croak, as it may try to recurse here itself. + my $class_type = $class . "::$type"; + if (grep { $_ eq $class_type } @recursed) { + CORE::die "panic: Infinite recursion in SWASHNEW for '$type'\n"; + } + push @recursed, $class_type; + + $type =~ s/^\s+//; + $type =~ s/\s+$//; + + # regcomp.c surrounds the property name with '__" and '_i' if this + # is to be caseless matching. + my $caseless = $type =~ s/^__(.*)_i$/$1/; + + print STDERR __LINE__, ": type=$type, caseless=$caseless\n" if DEBUG; + + GETFILE: + { + ## + ## It could be a user-defined property. Look in current + ## package if no package given + ## + + my $caller1 = $type =~ s/(.+)::// ? $1 : caller(1); + + if (defined $caller1 && $type =~ /^I[ns]\w+$/) { + my $prop = "${caller1}::$type"; + if (exists &{$prop}) { + # stolen from Scalar::Util::PP::tainted() + my $tainted; + { + local($@, $SIG{__DIE__}, $SIG{__WARN__}); + local $^W = 0; + no warnings; + eval { kill 0 * $prop }; + $tainted = 1 if $@ =~ /^Insecure/; + } + die "Insecure user-defined property \\p{$prop}\n" + if $tainted; + no strict 'refs'; + $list = &{$prop}($caseless); + $user_defined = 1; + last GETFILE; + } + } + + # During Perl's compilation, this routine may be called before + # the tables are constructed. If so, we have a chicken/egg + # problem. If we die, the tables never get constructed, so + # keep going, but return an empty table so only what the code + # has compiled in internally (currently ASCII/Latin1 range + # matching) will work. + BEGIN { + # Poor man's constant, to avoid a run-time check. + $utf8::{miniperl} + = \! defined &DynaLoader::boot_DynaLoader; + } + if (miniperl) { + eval "require '$unicore_dir/Heavy.pl'"; + last GETFILE if $@; + } + else { + require "$unicore_dir/Heavy.pl"; + } + BEGIN { delete $utf8::{miniperl} } + + # All property names are matched caselessly + my $property_and_table = CORE::lc $type; + print STDERR __LINE__, ": $property_and_table\n" if DEBUG; + + # See if is of the compound form 'property=value', where the + # value indicates the table we should use. + my ($property, $table, @remainder) = + split /\s*[:=]\s*/, $property_and_table, -1; + if (@remainder) { + pop @recursed if @recursed; + return $type; + } + + my $prefix; + if (! defined $table) { + + # Here, is the single form. The property becomes empty, and + # the whole value is the table. + $table = $property; + $prefix = $property = ""; + } else { + print STDERR __LINE__, ": $property\n" if DEBUG; + + # Here it is the compound property=table form. The property + # name is always loosely matched, and always can have an + # optional 'is' prefix (which isn't true in the single + # form). + $property = _loose_name($property) =~ s/^is//r; + + # And convert to canonical form. Quit if not valid. + $property = $utf8::loose_property_name_of{$property}; + if (! defined $property) { + pop @recursed if @recursed; + return $type; + } + + $prefix = "$property="; + + # If the rhs looks like it is a number... + print STDERR __LINE__, ": table=$table\n" if DEBUG; + if ($table =~ qr{ ^ [ \s 0-9 _ + / . -]+ $ }x) { + print STDERR __LINE__, ": table=$table\n" if DEBUG; + + # Don't allow leading nor trailing slashes + if ($table =~ / ^ \/ | \/ $ /x) { + pop @recursed if @recursed; + return $type; + } + + # Split on slash, in case it is a rational, like \p{1/5} + my @parts = split qr{ \s* / \s* }x, $table, -1; + print __LINE__, ": $type\n" if @parts > 2 && DEBUG; + + # Can have maximum of one slash + if (@parts > 2) { + pop @recursed if @recursed; + return $type; + } + + foreach my $part (@parts) { + print __LINE__, ": part=$part\n" if DEBUG; + + $part =~ s/^\+\s*//; # Remove leading plus + $part =~ s/^-\s*/-/; # Remove blanks after unary + # minus + + # Remove underscores between digits. + $part =~ s/( ?<= [0-9] ) _ (?= [0-9] ) //xg; + + # No leading zeros (but don't make a single '0' + # into a null string) + $part =~ s/ ^ ( -? ) 0+ /$1/x; + $part .= '0' if $part eq '-' || $part eq ""; + + # No trailing zeros after a decimal point + $part =~ s/ ( \. .*? ) 0+ $ /$1/x; + + # Begin with a 0 if a leading decimal point + $part =~ s/ ^ ( -? ) \. /${1}0./x; + + # Ensure not a trailing decimal point: turn into an + # integer + $part =~ s/ \. $ //x; + + print STDERR __LINE__, ": part=$part\n" if DEBUG; + #return $type if $part eq ""; + + # Result better look like a number. (This test is + # needed because, for example could have a plus in + # the middle.) + if ($part !~ / ^ -? [0-9]+ ( \. [0-9]+)? $ /x) { + pop @recursed if @recursed; + return $type; + } + } + + # If a rational... + if (@parts == 2) { + + # If denominator is negative, get rid of it, and ... + if ($parts[1] =~ s/^-//) { + + # If numerator is also negative, convert the + # whole thing to positive, or move the minus to + # the numerator + if ($parts[0] !~ s/^-//) { + $parts[0] = '-' . $parts[0]; + } + } + $table = join '/', @parts; + } + elsif ($property ne 'nv' || $parts[0] !~ /\./) { + + # Here is not numeric value, or doesn't have a + # decimal point. No further manipulation is + # necessary. (Note the hard-coded property name. + # This could fail if other properties eventually + # had fractions as well; perhaps the cjk ones + # could evolve to do that. This hard-coding could + # be fixed by mktables generating a list of + # properties that could have fractions.) + $table = $parts[0]; + } else { + + # Here is a floating point numeric_value. Try to + # convert to rational. First see if is in the list + # of known ones. + if (exists $utf8::nv_floating_to_rational{$parts[0]}) { + $table = $utf8::nv_floating_to_rational{$parts[0]}; + } else { + + # Here not in the list. See if is close + # enough to something in the list. First + # determine what 'close enough' means. It has + # to be as tight as what mktables says is the + # maximum slop, and as tight as how many + # digits we were passed. That is, if the user + # said .667, .6667, .66667, etc. we match as + # many digits as they passed until get to + # where it doesn't matter any more due to the + # machine's precision. If they said .6666668, + # we fail. + (my $fraction = $parts[0]) =~ s/^.*\.//; + my $epsilon = 10 ** - (length($fraction)); + if ($epsilon > $utf8::max_floating_slop) { + $epsilon = $utf8::max_floating_slop; + } + + # But it can't be tighter than the minimum + # precision for this machine. If haven't + # already calculated that minimum, do so now. + if (! defined $min_floating_slop) { + + # Keep going down an order of magnitude + # until find that adding this quantity to + # 1 remains 1; but put an upper limit on + # this so in case this algorithm doesn't + # work properly on some platform, that we + # won't loop forever. + my $count = 0; + $min_floating_slop = 1; + while (1+ $min_floating_slop != 1 + && $count++ < 50) + { + my $next = $min_floating_slop / 10; + last if $next == 0; # If underflows, + # use previous one + $min_floating_slop = $next; + print STDERR __LINE__, ": min_float_slop=$min_floating_slop\n" if DEBUG; + } + + # Back off a couple orders of magnitude, + # just to be safe. + $min_floating_slop *= 100; + } + + if ($epsilon < $min_floating_slop) { + $epsilon = $min_floating_slop; + } + print STDERR __LINE__, ": fraction=.$fraction; epsilon=$epsilon\n" if DEBUG; + + undef $table; + + # And for each possible rational in the table, + # see if it is within epsilon of the input. + foreach my $official + (keys %utf8::nv_floating_to_rational) + { + print STDERR __LINE__, ": epsilon=$epsilon, official=$official, diff=", abs($parts[0] - $official), "\n" if DEBUG; + if (abs($parts[0] - $official) < $epsilon) { + $table = + $utf8::nv_floating_to_rational{$official}; + last; + } + } + + # Quit if didn't find one. + if (! defined $table) { + pop @recursed if @recursed; + return $type; + } + } + } + print STDERR __LINE__, ": $property=$table\n" if DEBUG; + } + } + + # Combine lhs (if any) and rhs to get something that matches + # the syntax of the lookups. + $property_and_table = "$prefix$table"; + print STDERR __LINE__, ": $property_and_table\n" if DEBUG; + + # First try stricter matching. + $file = $utf8::stricter_to_file_of{$property_and_table}; + + # If didn't find it, try again with looser matching by editing + # out the applicable characters on the rhs and looking up + # again. + if (! defined $file) { + $table = _loose_name($table); + $property_and_table = "$prefix$table"; + print STDERR __LINE__, ": $property_and_table\n" if DEBUG; + $file = $utf8::loose_to_file_of{$property_and_table}; + } + + # Add the constant and go fetch it in. + if (defined $file) { + + # A beginning ! means to invert + $invert_it = $file =~ s/^!//; + + if ($utf8::why_deprecated{$file}) { + warnings::warnif('deprecated', "Use of '$type' in \\p{} or \\P{} is deprecated because: $utf8::why_deprecated{$file};"); + } + + if ($caseless + && exists $utf8::caseless_equivalent{$property_and_table}) + { + $file = $utf8::caseless_equivalent{$property_and_table}; + } + $file= "$unicore_dir/lib/$file.pl"; + last GETFILE; + } + print STDERR __LINE__, ": didn't find $property_and_table\n" if DEBUG; + + ## + ## Last attempt -- see if it's a standard "To" name + ## (e.g. "ToLower") ToTitle is used by ucfirst(). + ## The user-level way to access ToDigit() and ToFold() + ## is to use Unicode::UCD. + ## + # Only check if caller wants non-binary + my $retried = 0; + if ($minbits != 1 && $property_and_table =~ s/^to//) {{ + # Look input up in list of properties for which we have + # mapping files. + if (defined ($file = + $utf8::loose_property_to_file_of{$property_and_table})) + { + $type = $utf8::file_to_swash_name{$file}; + print STDERR __LINE__, ": type set to $type\n" if DEBUG; + $file = "$unicore_dir/$file.pl"; + last GETFILE; + } # If that fails see if there is a corresponding binary + # property file + elsif (defined ($file = + $utf8::loose_to_file_of{$property_and_table})) + { + + # Here, there is no map file for the property we are + # trying to get the map of, but this is a binary + # property, and there is a file for it that can easily + # be translated to a mapping. + + # In the case of properties that are forced to binary, + # they are a combination. We return the actual + # mapping instead of the binary. If the input is + # something like 'Tocjkkiicore', it will be found in + # %loose_property_to_file_of above as => 'To/kIICore'. + # But the form like ToIskiicore won't be. To fix + # this, it was easiest to do it here. These + # properties are the complements of the default + # property, so there is an entry in %loose_to_file_of + # that is 'iskiicore' => '!kIICore/N', If we find such + # an entry, strip off things and try again, which + # should find the entry in %loose_property_to_file_of. + # Actual binary properties that are of this form, such + # as this entry: 'ishrkt' => '!Perl/Any' will also be + # retried, but won't be in %loose_property_to_file_of, + # and instead the next time through, it will find + # 'hrkt' => '!Perl/Any' and proceed. + redo if ! $retried + && $file =~ /^!/ + && $property_and_table =~ s/^is//; + + # This is a binary property. Setting this here causes + # it to be stored as such in the cache, so if someone + # comes along later looking for just a binary, they + # get it. + $minbits = 1; + + $invert_it = $file =~ s/^!//; + $file = "$unicore_dir/lib/$file.pl"; + last GETFILE; + } + } } + + ## + ## If we reach this line, it's because we couldn't figure + ## out what to do with $type. Ouch. + ## + + pop @recursed if @recursed; + return $type; + } # end of GETFILE block + + if (defined $file) { + print STDERR __LINE__, ": found it (file='$file')\n" if DEBUG; + + ## + ## If we reach here, it was due to a 'last GETFILE' above + ## (exception: user-defined properties and mappings), so we + ## have a filename, so now we load it if we haven't already. + ## If we have, return the cached results. The cache key is the + ## class and file to load. + ## + my $found = $Cache{$class, $file}; + if ($found and ref($found) eq $class) { + print STDERR __LINE__, ": Returning cached '$file' for \\p{$type}; invert_it=$invert_it\n" if DEBUG; + pop @recursed if @recursed; + $found->{'INVERT_IT'} = $invert_it; + return $found; + } + + local $@; + local $!; + $list = do $file; die $@ if $@; + } + + $ListSorted = 1; ## we know that these lists are sorted + } # End of $type is non-null + + # Here, either $type was null, or we found the requested property and + # read it into $list + + my $extras; + + my $bits = $minbits; + + if ($list) { + my $taint = substr($list,0,0); # maintain taint + my @tmp = split(/^/m, $list); + my %seen; + no warnings; + $extras = join '', $taint, grep /^[^0-9a-fA-F]/, @tmp; + $list = join '', $taint, + map { $_->[1] } + sort { $a->[0] <=> $b->[0] } + map { /^([0-9a-fA-F]+)/; [ CORE::hex($1), $_ ] } + grep { /^([0-9a-fA-F]+)/ and not $seen{$1}++ } @tmp; # XXX doesn't do ranges right + } + + if ($none) { + my $hextra = sprintf "%04x", $none + 1; + $list =~ s/\tXXXX$/\t$hextra/mg; + } + + if ($minbits != 1 && $minbits < 32) { # not binary property + my $top = 0; + while ($list =~ /^([0-9a-fA-F]+)(?:[\t]([0-9a-fA-F]+)?)(?:[ \t]([0-9a-fA-F]+))?/mg) { + my $min = CORE::hex $1; + my $max = defined $2 ? CORE::hex $2 : $min; + my $val = defined $3 ? CORE::hex $3 : 0; + $val += $max - $min if defined $3; + $top = $val if $val > $top; + } + my $topbits = + $top > 0xffff ? 32 : + $top > 0xff ? 16 : 8; + $bits = $topbits if $bits < $topbits; + } + + my @extras; + if ($extras) { + for my $x ($extras) { + my $taint = substr($x,0,0); # maintain taint + pos $x = 0; + while ($x =~ /^([^0-9a-fA-F\n])(.*)/mg) { + my $char = "$1$taint"; + my $name = "$2$taint"; + print STDERR __LINE__, ": char [$char] => name [$name]\n" + if DEBUG; + if ($char =~ /[-+!&]/) { + my ($c,$t) = split(/::/, $name, 2); # bogus use of ::, really + my $subobj; + if ($c eq 'utf8') { + $subobj = utf8->SWASHNEW($t, "", $minbits, 0); + } + elsif (exists &$name) { + $subobj = utf8->SWASHNEW($name, "", $minbits, 0); + } + elsif ($c =~ /^([0-9a-fA-F]+)/) { + $subobj = utf8->SWASHNEW("", $c, $minbits, 0); + } + if (! ref $subobj) { + pop @recursed if @recursed && $type; + return $subobj; + } + push @extras, $name => $subobj; + $bits = $subobj->{BITS} if $bits < $subobj->{BITS}; + $user_defined = $subobj->{USER_DEFINED} + if $subobj->{USER_DEFINED}; + } + } + } + } + + if (DEBUG) { + print STDERR __LINE__, ": CLASS = $class, TYPE => $type, BITS => $bits, NONE => $none, INVERT_IT => $invert_it, USER_DEFINED => $user_defined"; + print STDERR "\nLIST =>\n$list" if defined $list; + print STDERR "\nEXTRAS =>\n$extras" if defined $extras; + print STDERR "\n"; + } + + my $SWASH = bless { + TYPE => $type, + BITS => $bits, + EXTRAS => $extras, + LIST => $list, + NONE => $none, + USER_DEFINED => $user_defined, + @extras, + } => $class; + + if ($file) { + $Cache{$class, $file} = $SWASH; + if ($type + && exists $utf8::SwashInfo{$type} + && exists $utf8::SwashInfo{$type}{'specials_name'}) + { + my $specials_name = $utf8::SwashInfo{$type}{'specials_name'}; + no strict "refs"; + print STDERR "\nspecials_name => $specials_name\n" if DEBUG; + $SWASH->{'SPECIALS'} = \%$specials_name; + } + $SWASH->{'INVERT_IT'} = $invert_it; + } + + pop @recursed if @recursed && $type; + + return $SWASH; } - $swatch; } +# Now SWASHGET is recasted into a C function S_swash_get (see utf8.c). + 1;