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#!/usr/bin/perl -w |
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# I'm assuming that you're running this on some kind of ASCII system, but |
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# it will generate EDCDIC too. (TODO) |
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use strict; |
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use Encode; |
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|
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my @lines = grep {!/^#/} <DATA>; |
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|
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sub addline { |
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my ($arrays, $chrmap, $letter, $arrayname, $spare, $nocsum, $size, |
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$condition) = @_; |
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my $line = "/* $letter */ $size"; |
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$line .= " | PACK_SIZE_SPARE" if $spare; |
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$line .= " | PACK_SIZE_CANNOT_CSUM" if $nocsum; |
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$line .= ","; |
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# And then the hack |
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$line = [$condition, $line] if $condition; |
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$arrays->{$arrayname}->[ord $chrmap->{$letter}] = $line; |
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# print ord $chrmap->{$letter}, " $line\n"; |
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} |
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|
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sub output_tables { |
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my %arrays; |
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|
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my $chrmap = shift; |
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foreach (@_) { |
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my ($letter, $shriek, $spare, $nocsum, $size, $condition) |
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= /^([A-Za-z])(!?)\t(\S*)\t(\S*)\t([^\t\n]+)(?:\t+(.*))?$/; |
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die "Can't parse '$_'" unless $size; |
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|
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if (defined $condition) { |
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$condition = join " && ", map {"defined($_)"} split ' ', $condition; |
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} |
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unless ($size =~ s/^=//) { |
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$size = "sizeof($size)"; |
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} |
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|
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addline (\%arrays, $chrmap, $letter, $shriek ? 'shrieking' : 'normal', |
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$spare, $nocsum, $size, $condition); |
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} |
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|
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my %earliest; |
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foreach my $arrayname (sort keys %arrays) { |
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my $array = $arrays{$arrayname}; |
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die "No defined entries in $arrayname" unless $array->[$#$array]; |
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# Find the first used entry |
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my $earliest = 0; |
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$earliest++ while (!$array->[$earliest]); |
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# Remove all the empty elements. |
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splice @$array, 0, $earliest; |
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print "unsigned char size_${arrayname}[", scalar @$array, "] = {\n"; |
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my @lines; |
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foreach (@$array) { |
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# Remove the assumption here that the last entry isn't conditonal |
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if (ref $_) { |
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push @lines, |
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["#if $_->[0]", " $_->[1]", "#else", " 0,", "#endif"]; |
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} else { |
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push @lines, $_ ? " $_" : " 0,"; |
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} |
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} |
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# remove the last, annoying, comma |
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my $last = $lines[$#lines]; |
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my $got; |
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foreach (ref $last ? @$last : $last) { |
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$got += s/,$//; |
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} |
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die "Last entry had no commas" unless $got; |
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print map {"$_\n"} ref $_ ? @$_ : $_ foreach @lines; |
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print "};\n"; |
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$earliest{$arrayname} = $earliest; |
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} |
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|
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print "struct packsize_t packsize[2] = {\n"; |
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|
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my @lines; |
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foreach (qw(normal shrieking)) { |
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my $array = $arrays{$_}; |
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push @lines, " {size_$_, $earliest{$_}, " . (scalar @$array) . "},"; |
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} |
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# remove the last, annoying, comma |
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chop $lines[$#lines]; |
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print "$_\n" foreach @lines; |
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print "};\n"; |
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} |
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|
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my %asciimap = (map {chr $_, chr $_} 0..255); |
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my %ebcdicmap = (map {chr $_, Encode::encode ("posix-bc", chr $_)} 0..255); |
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|
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print <<'EOC'; |
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#if 'J'-'I' == 1 |
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/* ASCII */ |
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EOC |
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output_tables (\%asciimap, @lines); |
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print <<'EOC'; |
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#else |
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/* EBCDIC (or bust) */ |
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EOC |
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output_tables (\%ebcdicmap, @lines); |
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print "#endif\n"; |
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|
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__DATA__ |
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#Symbol spare nocsum size |
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c char |
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C unsigned char |
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U char |
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s! short |
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s =SIZE16 |
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S! unsigned short |
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v =SIZE16 |
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n =SIZE16 |
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S =SIZE16 |
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v! =SIZE16 PERL_PACK_CAN_SHRIEKSIGN |
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n! =SIZE16 PERL_PACK_CAN_SHRIEKSIGN |
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i int |
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i! int |
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I unsigned int |
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I! unsigned int |
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j =IVSIZE |
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J =UVSIZE |
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l! long |
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l =SIZE32 |
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L! unsigned long |
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V =SIZE32 |
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N =SIZE32 |
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V! =SIZE32 PERL_PACK_CAN_SHRIEKSIGN |
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N! =SIZE32 PERL_PACK_CAN_SHRIEKSIGN |
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L =SIZE32 |
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p * char * |
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w * char |
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q Quad_t HAS_QUAD |
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Q Uquad_t HAS_QUAD |
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f float |
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d double |
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F =NVSIZE |
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D =LONG_DOUBLESIZE HAS_LONG_DOUBLE USE_LONG_DOUBLE |
