#!/usr/bin/perl -w

use warnings;

use strict;

print <<__EOF__;

/*

 * This file is part of PhysicsFS (http://icculus.org/physfs/)

 *

 * This data generated by physfs/extras/makecasefoldhashtable.pl ...

 * Do not manually edit this file!

 *

 * Please see the file LICENSE.txt in the source's root directory.

 */

#ifndef __PHYSICSFS_INTERNAL__

#error Do not include this header from your applications.

#endif

__EOF__

my @foldPairs;

for (my $i = 0; $i < 256; $i++) {

    $foldPairs[$i] = '';

}

open(FH,'<','casefolding.txt') or die("failed to open casefolding.txt: $!\n");

while (<FH>) {

    chomp;

    # strip comments from textfile...

    s/\#.*\Z//;

    # strip whitespace...

    s/\A\s+//;

    s/\s+\Z//;

    next if not /\A([a-fA-F0-9]+)\;\s*(.)\;\s*(.+)\;/;

    my ($code, $status, $mapping) = ($1, $2, $3);

    my $hexxed = hex($code);

    my $hashed = (($hexxed ^ ($hexxed >> 8)) & 0xFF);

    #print("// code '$code'   status '$status'   mapping '$mapping'\n");

    #print("// hexxed '$hexxed'  hashed '$hashed'\n");

    if (($status eq 'C') or ($status eq 'F')) {

        my ($map1, $map2, $map3) = ('0000', '0000', '0000');

        $map1 = $1 if $mapping =~ s/\A([a-fA-F0-9]+)(\s*|\Z)//;

        $map2 = $1 if $mapping =~ s/\A([a-fA-F0-9]+)(\s*|\Z)//;

        $map3 = $1 if $mapping =~ s/\A([a-fA-F0-9]+)(\s*|\Z)//;

        die("mapping space too small for '$code'\n") if ($mapping ne '');

        $foldPairs[$hashed] .= "    { 0x$code, 0x$map1, 0x$map2, 0x$map3 },\n";

    }

}

close(FH);

for (my $i = 0; $i < 256; $i++) {

    $foldPairs[$i] =~ s/,\n\Z//;

    my $str = $foldPairs[$i];

    next if $str eq '';

    my $num = '000' . $i;

    $num =~ s/\A.*?(\d\d\d)\Z/$1/;

    my $sym = "case_fold_${num}";

    print("static const CaseFoldMapping ${sym}[] = {\n$str\n};\n\n");

}

print("\nstatic const CaseFoldHashBucket case_fold_hash[256] = {\n");

for (my $i = 0; $i < 256; $i++) {

    my $str = $foldPairs[$i];

    if ($str eq '') {

        print("    { 0, NULL },\n");

    } else {

        my $num = '000' . $i;

        $num =~ s/\A.*?(\d\d\d)\Z/$1/;

        my $sym = "case_fold_${num}";

        print("    { __PHYSFS_ARRAYLEN($sym), $sym },\n");

    }

}

print("};\n\n");

exit 0;

# end of makecashfoldhashtable.pl ...