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#!/usr/bin/perl -w
# I'm assuming that you're running this on some kind of ASCII system, but
# it will generate EBCDIC too. (TODO)
use strict;
use Encode;
require 'regen/regen_lib.pl';
sub make_text {
my ($chrmap, $letter, $unpredictable, $nocsum, $size, $condition) = @_;
my $text = " /* $letter */ $size";
$text .= " | PACK_SIZE_UNPREDICTABLE" if $unpredictable;
$text .= " | PACK_SIZE_CANNOT_CSUM" if $nocsum;
$text .= ",";
if ($condition) {
$text = "#if $condition
$text
#else
0,
#endif";
}
return $text;
}
sub make_tables {
my %arrays;
my $chrmap = shift;
foreach (@_) {
my ($letter, $shriek, $unpredictable, $nocsum, $size, $condition) =
/^([A-Za-z])(!?)\t(\S*)\t(\S*)\t([^\t\n]+)(?:\t+(.*))?$/ or
die "Can't parse '$_'";
$size = "sizeof($size)" unless $size =~ s/^=//;
$arrays{$shriek ? 'shrieking' : 'normal'}{ord $chrmap->{$letter}} =
make_text($chrmap, $letter,
$unpredictable, $nocsum, $size, $condition);
}
my $text = "STATIC const packprops_t packprops[512] = {\n";
foreach my $arrayname (qw(normal shrieking)) {
my $array = $arrays{$arrayname} ||
die "No defined entries in $arrayname";
$text .= " /* $arrayname */\n";
for my $ch (0..255) {
$text .= $array->{$ch} || " 0,";
$text .= "\n";
}
}
# Join "0," entries together
1 while $text =~ s/\b0,\s*\n\s*0,/0, 0,/g;
# But split them up again if the sequence gets too long
$text =~ s/((?:\b0, ){15}0,) /$1\n /g;
# Clean up final ,
$text =~ s/,$//;
$text .= "};";
return $text;
}
my @lines = grep {
s/#.*//;
/\S/;
} <DATA>;
my %asciimap = map {chr $_, chr $_} 0..255;
# Currently, all things generated by this on EBCDIC are alphabetics, whose
# positions are all the same regardless of code page, so any EBCDIC encoding
# will work; just choose one
my %ebcdicmap = map {chr $_, Encode::encode("posix-bc", chr $_)} 0..255;
my $fh = open_new('packsizetables.c', '>', { by => $0, from => 'its data'});
print $fh <<"EOC";
#if TYPE_IS_SHRIEKING != 0x100
++++shriek offset should be 256
#endif
typedef U8 packprops_t;
#if 'J'-'I' == 1
/* ASCII */
@{[make_tables (\%asciimap, @lines)]}
#else
/* EBCDIC (or bust) */
@{[make_tables (\%ebcdicmap, @lines)]}
#endif
EOC
read_only_bottom_close_and_rename($fh);
__DATA__
#Symbol unpredictable
# nocsum size
c char
C unsigned char
W * unsigned char
U * char
s! short
s =SIZE16
S! unsigned short
v =SIZE16
n =SIZE16
S =SIZE16
v! =SIZE16
n! =SIZE16
i int
i! int
I unsigned int
I! unsigned int
j =IVSIZE
J =UVSIZE
l! long
l =SIZE32
L! unsigned long
V =SIZE32
N =SIZE32
V! =SIZE32
N! =SIZE32
L =SIZE32
p * char *
w * * char
q Quad_t IVSIZE >= 8
Q Uquad_t IVSIZE >= 8
f float
d double
F =NVSIZE
D =LONG_DOUBLESIZE defined(HAS_LONG_DOUBLE) && defined(USE_LONG_DOUBLE)
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