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|
#!/usr/bin/perl -w
#
# make_encmap
#
# Copyright 1998 Clark Cooper
# All rights reserved.
#
# This program is free software; you may redistribute it and/or
# modify it under the same terms as Perl itself.
#
my $name = shift;
my $file = shift;
my $except_str = '$@\^`{}~';
my %Exceptions;
foreach (unpack('c*', $except_str)) {
$Exceptions{$_} = 1;
}
die "Usage is:\n\tmake_encmap name file\n"
unless (defined($name) and defined($file));
open(MAP, $file) or die "Couldn't open $file";
my @byte1;
my $minpos = 256;
while (<MAP>) {
next if /^\#/;
next unless /0x([\da-f]{2,4})\s+0x([\da-f]{4})\s*\#\s*(.*)\s*$/i;
my ($from, $to, $name) = ($1, $2, $3);
my $flen = length($from);
die "Bad line at $., from must be either 2 or 4 digits:\n$_"
if $flen == 3;
my $toval = hex($to);
my $f1 = substr($from, 0, 2);
my $f1val = hex($f1);
if ($flen == 2) {
if ($f1val < 128) {
next if $f1val == $toval;
warn "The byte '0x$f1' mapped to 0x$to\n"
unless defined($Exceptions{$f1val});
}
if (defined($byte1[$f1val])) {
die "Multiple mappings for 0x$f1val: $to & " . sprintf("0x%x",
$byte1[$f1val])
if ($byte1[$f1val] != $toval);
}
else {
$byte1[$f1val] = $toval;
$minpos = $f1val
if $f1val < $minpos;
}
}
else {
my $b1 = $byte1[$f1val];
if (defined($b1)) {
die "The 1st byte of '$from' overlaps a single byte definition."
unless ref($b1);
}
else {
$b1 = $byte1[$f1val] = [];
$minpos = $f1val
if $f1val < $minpos;
}
my $f2 = substr($from, 2, 2);
my $f2val = hex($f2);
$b1->[$f2val] = $toval;
}
}
close(MAP);
print "<encmap name='$name'>\n";
die "Minpos never set" unless $minpos < 256;
process_byte(2, $minpos, \@byte1);
print "</encmap>\n";
####
## End main
####
sub emit {
my ($pre, $start, $lim, $val) = @_;
my $len = $lim - $start;
if ($len == 1) {
printf("$pre<ch byte='x%02x' uni='x%04x'/>\n", $start, $val);
}
else {
printf("$pre<range byte='x%02x' len='%d' uni='x%04x'/>\n",
$start, $len, $val);
}
} # End emit
sub process_byte {
my ($lead, $minpos, $aref) = @_;
my $rngstrt;
my $rngval;
my $i;
my $prefix = ' ' x $lead;
for ($i = $minpos; $i <= $#{$aref}; $i++) {
my $v = $ {$aref}[$i];
if (defined($v)) {
if (ref($v)) {
emit($prefix, $rngstrt, $i, $rngval)
if defined($rngstrt);
$rngstrt = undef;
printf "$prefix<prefix byte='x%02x'>\n", $i;
process_byte($lead + 2, 0, $v);
print "$prefix</prefix>\n";
}
else {
next if (defined($rngstrt) and ($v - $rngval == $i - $rngstrt));
emit($prefix, $rngstrt, $i, $rngval)
if defined($rngstrt);
$rngstrt = $i;
$rngval = $v;
}
}
else {
emit($prefix, $rngstrt, $i, $rngval)
if defined($rngstrt);
$rngstrt = undef;
}
}
emit($prefix, $rngstrt, $i, $rngval)
if defined($rngstrt);
} # End process_byte
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