[p5sagit/p5-mst-13.2.git] / lib / utf8_heavy.pl

package utf8;
use strict;
use warnings;

sub DEBUG () { 0 }

sub DESTROY {}

sub croak { require Carp; Carp::croak(@_) }

sub SWASHNEW {
    my ($class, $type, $list, $minbits, $none) = @_;
    local $^D = 0 if $^D;

    print STDERR "SWASHNEW @_\n" if DEBUG;

    ## check to see if we've already got it.
    {
        no strict 'refs';
        if ($type and ref ${"${class}::{$type}"} eq $class) {
            warn qq/Found \${"${class}::{$type}"}\n/ if DEBUG;
            return ${"${class}::{$type}"};
        }
    }

    ##
    ## Get the list of codepoints for the type.
    ## Called from utf8.c
    ##
    ## Given a $type, our goal is to fill $list with the set of codepoint
    ## ranges. As we try various interpretations of $type, sometimes we'll
    ## end up with the $list directly, and sometimes we'll end up with a
    ## $file name that holds the list data.
    ##
    ## To make the parsing of $type clear, this code takes the a rather
    ## unorthadox approach of last'ing out of the block once we have the
    ## info we need. Were this to be a subroutine, the 'last' would just
    ## be a 'return'.
    ##
    if ($type)
    {
        $type =~ s/^\s+//;
        $type =~ s/\s+$//;

        print "type = $type\n" if DEBUG;

        my $file;
        ## Figure out what file to load to get the data....
      GETFILE:
        {
            ##
            ## First, see if it's an "Is" name (the 'Is' is optional)
            ##
            ## Because we check "Is" names first, they have precidence over
            ## "In" names. For example, "Greek" is both a script and a
            ## block. "IsGreek" always gets the script, while "InGreek"
            ## always gets the block. "Greek" gets the script because we
            ## check "Is" names first.
            ##
            if ($type =~ m{^
                           ## "Is" prefix, or "Script=" or "Category="
                           (?: Is [- _]? | (?:Script|Category)\s*=\s* )?
                           ## name to check in the "Is" symbol table.
                           ([A-Z].*)
                           $
                          }ix)
            {
                my $istype = $1;
                ##
                ## Input ($type)     Name To Check ($istype)
                ## -------------     -----------------------
                ## IsLu                 Lu
                ## Lu                   Lu
                ## Category = Lu        Lu
                ## Foo                  Foo
                ## Script = Greek       Greek
                ##

                print "istype = $istype\n" if DEBUG;

                ## Load "Is" mapping data, if not yet loaded.
                do "unicore/Is.pl" if not defined %utf8::Is;

                ##
                ## If the "Is" mapping data has an exact match, it points
                ## to the file we need.
                ##
                if (exists $utf8::Is{$istype})
                {
                    $file = "unicore/Is/$utf8::Is{$istype}.pl";
                    last GETFILE;
                }

                ##
                ## Need to look at %utf8::IsPat (loaded from "unicore/Is.pl")
                ## to see if there's a regex that matches this $istype.
                ## If so, the associated name is the file we need.
                ##
                my $prefix = substr(lc($istype), 0, 2);
                if (exists $utf8::IsPat{$prefix})
                {
                    while (my ($pat, $name) = each %{$utf8::IsPat{$prefix}})
                    {
                        print "isprefix = $prefix, Is = $istype, pat = $pat\n" if DEBUG;
                        ##
                        ## The following regex probably need not be cached,
                        ## since every time there's a match, the results of
                        ## the entire call to SWASHNEW() is cached, so there's
                        ## a very limited number of times any one $pat will
                        ## be evaluated as a regex, at least with "reasonable"
                        ## code that doesn't try a baziilion \p{Random} names.
                        ##
                        if ($istype =~ /^$pat$/i)
                        {
                            $file = "unicore/Is/$name.pl";
                            last GETFILE;
                        }
                    }
                }
            }

            ##
            ## Couldn't find via "Is" -- let's try via "In".....
            ##
            if ($type =~ m{^
                           ( In(?!herited$)[- _]? | Block\s*=\s*)?
                           ([A-Z].*)
                           $
                          }xi)
            {
                my $intype = $2;
                print "intype = $intype\n" if DEBUG;

                ##
                ## Input ($type)      Name To Check ($intype)
                ## -------------      -----------------------
                ## Inherited             Inherited
                ## InGreek               Greek
                ## Block = Greek         Greek
                ##

                ## Load "In" mapping data, if not yet loaded.
                do "unicore/In.pl" if not defined %utf8::In;

                ## If there's a direct match, it points to the file we need
                if (exists $utf8::In{$intype}) {
                    $file = "unicore/In/$utf8::In{$intype}.pl";
                    last GETFILE;
                }

                my $prefix = substr(lc($intype), 0, 2);
                if (exists $utf8::InPat{$prefix})
                {
                    print "inprefix = $prefix, In = $intype\n" if DEBUG;
                    while (my ($pat, $name) = each %{$utf8::InPat{$prefix}})
                    {
                        print "inprefix = $prefix, In = $intype, k = $pat\n" if DEBUG;
                        if ($intype =~ /^$pat$/i) {
                            $file = "unicore/In/$name.pl";
                            print "inprefix = $prefix, In = $intype, k = $pat, file = $file\n" if DEBUG;
                            last GETFILE;
                        }
                    }
                }
            }

            ##
            ## Last attempt -- see if it's a "To" name (e.g. "ToLower")
            ##
            if ($type =~ /^To([A-Z][A-Za-z]+)$/)
            {
                $file = "unicore/To/$1.pl";
                ## would like to test to see if $file actually exists....
                last GETFILE;
            }

            ##
            ## If we reach this line, it's because we couldn't figure
            ## out what to do with $type. Ouch.
            ##
            croak("Can't find Unicode character property \"$type\"");
        }

        ##
        ## If we reach here, it was due to a 'last GETFILE' above, so we
        ## have a filename, so now we load it.
        ##
        $list = do $file;
    }

    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 ($none) {
	my $hextra = sprintf "%04x", $none + 1;
	$list =~ s/\tXXXX$/\t$hextra/mg;
    }

    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};
	    }
	}
    }

    print STDERR "CLASS = $class, TYPE => $type, BITS => $bits, NONE => $none\nEXTRAS =>\n$extras\nLIST =>\n$list\n" if DEBUG;

    no strict 'refs';
    ${"${class}::{$type}"} = bless {
	TYPE => $type,
	BITS => $bits,
	EXTRAS => $extras,
	LIST => $list,
	NONE => $none,
	@extras,
    } => $class;
}

# 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 }
    }

    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";
    }
    $swatch;
}

1;
Commit	Line	Data
a0ed51b3	1	package utf8;
cf25bb62	2	use strict;
cf25bb62	3	use warnings;
a0ed51b3	4
15732964	5	sub DEBUG () { 0 }
a0ed51b3	6
	7	sub DESTROY {}
	8
	9	sub croak { require Carp; Carp::croak(@_) }
	10
	11	sub SWASHNEW {
	12	my ($class, $type, $list, $minbits, $none) = @_;
	13	local $^D = 0 if $^D;
15732964	14
	15	print STDERR "SWASHNEW @_\n" if DEBUG;
	16
cf25bb62	17	## check to see if we've already got it.
	18	{
	19	no strict 'refs';
	20	if ($type and ref ${"${class}::{$type}"} eq $class) {
	21	warn qq/Found \${"${class}::{$type}"}\n/ if DEBUG;
	22	return ${"${class}::{$type}"};
	23	}
a0ed51b3	24	}
a0ed51b3	25
cf25bb62	26	##
	27	## Get the list of codepoints for the type.
	28	## Called from utf8.c
	29	##
	30	## Given a $type, our goal is to fill $list with the set of codepoint
	31	## ranges. As we try various interpretations of $type, sometimes we'll
	32	## end up with the $list directly, and sometimes we'll end up with a
	33	## $file name that holds the list data.
	34	##
	35	## To make the parsing of $type clear, this code takes the a rather
	36	## unorthadox approach of last'ing out of the block once we have the
	37	## info we need. Were this to be a subroutine, the 'last' would just
	38	## be a 'return'.
	39	##
	40	if ($type)
	41	{
	42	$type =~ s/^\s+//;
	43	$type =~ s/\s+$//;
	44
	45	print "type = $type\n" if DEBUG;
	46
	47	my $file;
	48	## Figure out what file to load to get the data....
	49	GETFILE:
	50	{
	51	##
	52	## First, see if it's an "Is" name (the 'Is' is optional)
	53	##
	54	## Because we check "Is" names first, they have precidence over
	55	## "In" names. For example, "Greek" is both a script and a
	56	## block. "IsGreek" always gets the script, while "InGreek"
	57	## always gets the block. "Greek" gets the script because we
	58	## check "Is" names first.
	59	##
	60	if ($type =~ m{^
	61	## "Is" prefix, or "Script=" or "Category="
	62	(?: Is [- _]? \| (?:Script\|Category)\s=\s )?
	63	## name to check in the "Is" symbol table.
	64	([A-Z].*)
	65	$
	66	}ix)
	67	{
	68	my $istype = $1;
	69	##
	70	## Input ($type) Name To Check ($istype)
	71	## ------------- -----------------------
	72	## IsLu Lu
	73	## Lu Lu
	74	## Category = Lu Lu
	75	## Foo Foo
	76	## Script = Greek Greek
	77	##
	78
	79	print "istype = $istype\n" if DEBUG;
	80
	81	## Load "Is" mapping data, if not yet loaded.
	82	do "unicore/Is.pl" if not defined %utf8::Is;
	83
	84	##
	85	## If the "Is" mapping data has an exact match, it points
	86	## to the file we need.
	87	##
	88	if (exists $utf8::Is{$istype})
	89	{
90	$file = "unicore/Is/$utf8::Is{$istype}.pl";
91	last GETFILE;
92	}
93
94	##
95	## Need to look at %utf8::IsPat (loaded from "unicore/Is.pl")
96	## to see if there's a regex that matches this $istype.
97	## If so, the associated name is the file we need.
98	##
99	my $prefix = substr(lc($istype), 0, 2);
100	if (exists $utf8::IsPat{$prefix})
101	{
102	while (my ($pat, $name) = each %{$utf8::IsPat{$prefix}})
103	{
104	print "isprefix = $prefix, Is = $istype, pat = $pat\n" if DEBUG;
105	##
106	## The following regex probably need not be cached,
107	## since every time there's a match, the results of
108	## the entire call to SWASHNEW() is cached, so there's
109	## a very limited number of times any one $pat will
110	## be evaluated as a regex, at least with "reasonable"
111	## code that doesn't try a baziilion \p{Random} names.
112	##
113	if ($istype =~ /^$pat$/i)
114	{
115	$file = "unicore/Is/$name.pl";
116	last GETFILE;
117	}
118	}
119	}
120	}
121
122	##
123	## Couldn't find via "Is" -- let's try via "In".....
124	##
125	if ($type =~ m{^
126	( In(?!herited$)[- _]? \| Block\s=\s)?
127	([A-Z].*)
128	$
129	}xi)
130	{
131	my $intype = $2;
132	print "intype = $intype\n" if DEBUG;
133
134	##
135	## Input ($type) Name To Check ($intype)
136	## ------------- -----------------------
137	## Inherited Inherited
138	## InGreek Greek
139	## Block = Greek Greek
140	##
141
142	## Load "In" mapping data, if not yet loaded.
143	do "unicore/In.pl" if not defined %utf8::In;
144
145	## If there's a direct match, it points to the file we need
146	if (exists $utf8::In{$intype}) {
147	$file = "unicore/In/$utf8::In{$intype}.pl";
148	last GETFILE;
149	}
150
151	my $prefix = substr(lc($intype), 0, 2);
152	if (exists $utf8::InPat{$prefix})
153	{
154	print "inprefix = $prefix, In = $intype\n" if DEBUG;
155	while (my ($pat, $name) = each %{$utf8::InPat{$prefix}})
156	{
157	print "inprefix = $prefix, In = $intype, k = $pat\n" if DEBUG;
158	if ($intype =~ /^$pat$/i) {
159	$file = "unicore/In/$name.pl";
160	print "inprefix = $prefix, In = $intype, k = $pat, file = $file\n" if DEBUG;
161	last GETFILE;
162	}
163	}
164	}
165	}
166
167	##
168	## Last attempt -- see if it's a "To" name (e.g. "ToLower")
169	##
170	if ($type =~ /^To([A-Z][A-Za-z]+)$/)
171	{
172	$file = "unicore/To/$1.pl";
173	## would like to test to see if $file actually exists....
174	last GETFILE;
175	}
176
177	##
178	## If we reach this line, it's because we couldn't figure
179	## out what to do with $type. Ouch.
180	##
181	croak("Can't find Unicode character property \"$type\"");
182	}
183
184	##
185	## If we reach here, it was due to a 'last GETFILE' above, so we
186	## have a filename, so now we load it.
187	##
188	$list = do $file;
886ba366	189	}
a0ed51b3	190
15732964	191	my $extras;
15732964	192	my $bits;
cf25bb62	193
a0ed51b3	194	if ($list) {
	195	my @tmp = split(/^/m, $list);
	196	my %seen;
db376a24	197	no warnings;
a0ed51b3	198	$extras = join '', grep /^[^0-9a-fA-F]/, @tmp;
	199	$list = join '',
	200	sort { hex $a <=> hex $b }
	201	grep {/^([0-9a-fA-F]+)/ and not $seen{$1}++} @tmp; # XXX doesn't do ranges right
	202	}
	203
	204	if ($none) {
	205	my $hextra = sprintf "%04x", $none + 1;
	206	$list =~ s/\tXXXX$/\t$hextra/mg;
	207	}
	208
	209	if ($minbits < 32) {
	210	my $top = 0;
	211	while ($list =~ /^([0-9a-fA-F]+)(?:\t([0-9a-fA-F]+)?)(?:\t([0-9a-fA-F]+))?/mg) {
	212	my $min = hex $1;
	213	my $max = hex(defined $2 ? $2 : $1);
	214	my $val = hex(defined $3 ? $3 : "");
	215	$val += $max - $min if defined $3;
	216	$top = $val if $val > $top;
	217	}
	218	$bits =
	219	$top > 0xffff ? 32 :
	220	$top > 0xff ? 16 :
	221	$top > 1 ? 8 : 1
	222	}
	223	$bits = $minbits if $bits < $minbits;
	224
	225	my @extras;
	226	for my $x ($extras) {
	227	pos $x = 0;
1fef36c7	228	while ($x =~ /^([^0-9a-fA-F\n])(.*)/mg) {
a0ed51b3	229	my $char = $1;
a0ed51b3	230	my $name = $2;
6d6ae962	231	print STDERR "$1 => $2\n" if DEBUG;
a0ed51b3	232	if ($char =~ /[-+!]/) {
	233	my ($c,$t) = split(/::/, $name, 2); # bogus use of ::, really
	234	my $subobj = $c->SWASHNEW($t, "", 0, 0, 0);
	235	push @extras, $name => $subobj;
	236	$bits = $subobj->{BITS} if $bits < $subobj->{BITS};
	237	}
	238	}
	239	}
	240
15732964	241	print STDERR "CLASS = $class, TYPE => $type, BITS => $bits, NONE => $none\nEXTRAS =>\n$extras\nLIST =>\n$list\n" if DEBUG;
a0ed51b3	242
cf25bb62	243	no strict 'refs';
a0ed51b3	244	${"${class}::{$type}"} = bless {
	245	TYPE => $type,
	246	BITS => $bits,
	247	EXTRAS => $extras,
	248	LIST => $list,
	249	NONE => $none,
	250	@extras,
	251	} => $class;
	252	}
	253
	254	# NOTE: utf8.c:swash_init() assumes entries are never modified once generated.
	255
	256	sub SWASHGET {
035d37be	257	# See utf8.c:Perl_swash_fetch for problems with this interface.
a0ed51b3	258	my ($self, $start, $len) = @_;
a0ed51b3	259	local $^D = 0 if $^D;
a0ed51b3	260	my $type = $self->{TYPE};
	261	my $bits = $self->{BITS};
	262	my $none = $self->{NONE};
15732964	263	print STDERR "SWASHGET @_ [$type/$bits/$none]\n" if DEBUG;
a0ed51b3	264	my $end = $start + $len;
	265	my $swatch = "";
	266	my $key;
	267	vec($swatch, $len - 1, $bits) = 0; # Extend to correct length.
	268	if ($none) {
	269	for $key (0 .. $len - 1) { vec($swatch, $key, $bits) = $none }
	270	}
	271
	272	for ($self->{LIST}) {
	273	pos $_ = 0;
	274	if ($bits > 1) {
	275	LINE:
	276	while (/^([0-9a-fA-F]+)(?:\t([0-9a-fA-F]+)?)(?:\t([0-9a-fA-F]+))?/mg) {
	277	my $min = hex $1;
	278	my $max = (defined $2 ? hex $2 : $min);
	279	my $val = hex $3;
	280	next if $max < $start;
6d6ae962	281	print "$min $max $val\n" if DEBUG;
a0ed51b3	282	if ($none) {
a0ed51b3	283	if ($min < $start) {
710250cb	284	$val += $start - $min if $val < $none;
a0ed51b3	285	$min = $start;
	286	}
	287	for ($key = $min; $key <= $max; $key++) {
	288	last LINE if $key >= $end;
6d6ae962	289	print STDERR "$key => $val\n" if DEBUG;
a0ed51b3	290	vec($swatch, $key - $start, $bits) = $val;
	291	++$val if $val < $none;
	292	}
	293	}
	294	else {
	295	if ($min < $start) {
	296	$val += $start - $min;
	297	$min = $start;
	298	}
	299	for ($key = $min; $key <= $max; $key++, $val++) {
	300	last LINE if $key >= $end;
6d6ae962	301	print STDERR "$key => $val\n" if DEBUG;
a0ed51b3	302	vec($swatch, $key - $start, $bits) = $val;
	303	}
	304	}
	305	}
	306	}
	307	else {
	308	LINE:
	309	while (/^([0-9a-fA-F]+)(?:\t([0-9a-fA-F]+))?/mg) {
	310	my $min = hex $1;
	311	my $max = (defined $2 ? hex $2 : $min);
	312	next if $max < $start;
	313	if ($min < $start) {
	314	$min = $start;
	315	}
	316	for ($key = $min; $key <= $max; $key++) {
	317	last LINE if $key >= $end;
6d6ae962	318	print STDERR "$key => 1\n" if DEBUG;
a0ed51b3	319	vec($swatch, $key - $start, 1) = 1;
	320	}
	321	}
	322	}
	323	}
	324	for my $x ($self->{EXTRAS}) {
	325	pos $x = 0;
1fef36c7	326	while ($x =~ /^([-+!])(.*)/mg) {
a0ed51b3	327	my $char = $1;
a0ed51b3	328	my $name = $2;
15732964	329	print STDERR "INDIRECT $1 $2\n" if DEBUG;
1fef36c7	330	my $otherbits = $self->{$name}->{BITS};
	331	croak("SWASHGET size mismatch") if $bits < $otherbits;
	332	my $other = $self->{$name}->SWASHGET($start, $len);
	333	if ($char eq '+') {
	334	if ($bits == 1 and $otherbits == 1) {
	335	$swatch \|= $other;
a0ed51b3	336	}
1fef36c7	337	else {
	338	for ($key = 0; $key < $len; $key++) {
	339	vec($swatch, $key, $bits) = vec($other, $key, $otherbits);
a0ed51b3	340	}
1fef36c7	341	}
	342	}
	343	elsif ($char eq '!') {
	344	if ($bits == 1 and $otherbits == 1) {
	345	$swatch \|= ~$other;
	346	}
	347	else {
	348	for ($key = 0; $key < $len; $key++) {
	349	if (!vec($other, $key, $otherbits)) {
	350	vec($swatch, $key, $bits) = 1;
a0ed51b3	351	}
	352	}
	353	}
1fef36c7	354	}
	355	elsif ($char eq '-') {
	356	if ($bits == 1 and $otherbits == 1) {
	357	$swatch &= ~$other;
	358	}
	359	else {
	360	for ($key = 0; $key < $len; $key++) {
	361	if (vec($other, $key, $otherbits)) {
	362	vec($swatch, $key, $bits) = 0;
a0ed51b3	363	}
	364	}
	365	}
	366	}
	367	}
	368	}
15732964	369	if (DEBUG) {
a0ed51b3	370	print STDERR "CELLS ";
	371	for ($key = 0; $key < $len; $key++) {
	372	print STDERR vec($swatch, $key, $bits), " ";
	373	}
	374	print STDERR "\n";
	375	}
	376	$swatch;
	377	}
	378
	379	1;