Admin/fixencoding

isatool fixgoal;

#!/usr/local/dist/bin/perl -w
#
# $Id$
#
# fixencoding - fix references to isabelle font encoding


## global settings

$prgname = "fixencoding";

$enc_file = "Distribution/lib/encodings/isabelle-0";


## diagnostics

sub warn {
    print STDERR $_[0], "\n";
}

sub fail {
    &warn("$prgname: " . $_[0]);
    exit 2;
}


## utils

sub read_encoding {
    local($file) = $_[0];
    local($current, $line) = (-1, 0);


    # scan file

    open (FILE, $file) || die $!;

    while (<FILE>) {
	$line++;
	s/#.*$//;
	s/\s//g;
	next if !$_;

	if (m/^(\d+):(.*)$/) {
	    $current = $1;
	    $_ = $2;
	}

	next if !$_;

	if ($current < 0) {
	    &fail("Malformed encoding file \"$file\", line $line");
	}

	if ($enc_first < 0 || $enc_first > $current) {
	    $enc_first = $current;
	}
	if ($enc_last < 0 || $enc_last < $current) {
	    $enc_last = $current;
	}
	$enc_tab[$current] = $_;
	$current++;
    }

    close FILE;


    # fill gaps

    if ($enc_first < 0 || $enc_last < 0) {
	&fail("Empty encoding file \"$file\"");
    }

    for ($current = $enc_first; $current <= $enc_last; $current++) {
	if (!$enc_tab[$current]) {
	    &warn("position $current undefined");
	    $enc_tab[$current] = "undef$current";
	}
    }
}


sub patch_file {
    local($file, $text) = @_;

    open(INFILE, $file) || die $!;
    open(OUTFILE, ">$file~") || die $!;

    while (<INFILE>) {
	print OUTFILE;
	last if m/GENERATED TEXT FOLLOWS/;
    }
    print OUTFILE $text;
    while (<INFILE>) {
	next if !m/END OF GENERATED TEXT/;
	print OUTFILE;
	last;
    }
    while (<INFILE>) {
	print OUTFILE;
    }

    close(INFILE);
    close(OUTFILE);

    unlink($file) || die $!;
    rename("$file~", $file) || die $!;
}



## main

# read encoding file

$enc_first = -1;
$enc_last = -1;
@enc_tab = ();

&read_encoding($enc_file);


# make tables

for ($current = $enc_first; $current <= $enc_last; $current++) {
    push(@ml_tab, '"\\\\<' . $enc_tab[$current] . '>"');
    push(@perl_tab, sprintf('"\\x%2x", "\\\\<%s>"', $current, $enc_tab[$current]));
    push(@perl_revtab, sprintf('"\\\\<%s>", "\\x%2x"', $enc_tab[$current], $current));
}

$ml_tab = "  " . join(",\n  ", @ml_tab) . "\n";
$perl_tab = "  " . join(",\n  ", @perl_tab) . "\n";
$perl_revtab = "  " . join(",\n  ", @perl_revtab) . "\n";


# patch files

&patch_file("Pure/Syntax/symbol.ML", $ml_tab);
&patch_file("Distribution/lib/scripts/symbolinput.pl", $perl_tab);
&patch_file("Distribution/lib/scripts/feeder.pl", $perl_tab);
#&patch_file("Distribution/lib/scripts/symboloutput.pl", $perl_revtab);