#!/usr/bin/perl -s

if(!$ARGV[0]) {
    print <<MOO
Usage: genlang [-p=<prefix>] <language file>

When running this program. <prefix>.h and <prefix>.c will be created in the
"current directory". <prefix> is "lang" by default.
MOO
;
    exit;
}

my $prefix = $p;
if(!$prefix) {
    $prefix="lang";
}

my $input = $ARGV[0];

open(HFILE, ">$prefix.h");
open(CFILE, ">$prefix.c");

print HFILE <<MOO
/* This file was automatically generated using genlang */
/*
 * The str() macro/functions is how to access strings that might be
 * translated. Use it like str(MACRO) and expect a string to be
 * returned!
 */
#define str(x) language_strings[x]

/* this is the array for holding the string pointers.
   It will be initialized at runtime. */
extern unsigned char *language_strings[];
/* this contains the concatenation of all strings, separated by \\0 chars */
extern const unsigned char language_builtin[];

/* The enum below contains all available strings */
enum {
MOO
    ;

print CFILE <<MOO
/* This file was automaticly generated using genlang, the strings come
   from "$input" */
   
#include "$prefix.h"

unsigned char *language_strings[LANG_LAST_INDEX_IN_ARRAY];
const unsigned char language_builtin[] =
MOO
    ;

open(LANG, "<$input");
while(<LANG>) {
    $line++;
    if($_ =~ / *\#/) {
        # comment
        next;
    }
    # get rid of DOS newlines
    $_ =~ s/\r//g;
    if($_ =~ / *([a-z]+): *(.*)/) {
        ($var, $value) = ($1, $2);
        # print "$var => $value\n";

        $set{$var} = $value;

        if( (($var eq "new") && $value && ($value !~ /^\"(.*)\"\W*$/)) ||
            (($var eq "voice") && $value && ($value !~ /^\"(.*)\"\W*$/)) ||
            (($var eq "eng") && ($value !~ /^\"(.*)\"\W*$/)) ) {
            print "$input:$line:missing quotes for ".$set{'id'}."\n";
            $errors++;
            next;
        }

        if($var eq "new") {
            # the last one for a single phrase

            if(!$value || ($value eq "\"\"") ) {
                # if not set, get the english version
                $value = $set{'eng'};
            }
#            print "VOICE: ".$set{'voice'}." VALUE: $value\n";
            # Note: if both entries are "", the string is deprecated,
            # but must be included to maintain compatibility
            if($set{'id'} =~ /^VOICE_/) {
                # voice-only
                push @vfile, $set{'id'};
            }
            else {
                push @hfile, $set{'id'};
                $value =~ s/^\"(.*)\"\W*$/\"$1\\0\"/;
                print CFILE "    $value\n";
            }

            undef %set;
        }

    }

}
close(LANG);

for(@hfile) {
    print HFILE "    $_,\n";
}

print HFILE <<MOO
    LANG_LAST_INDEX_IN_ARRAY, /* this is not a string, this is a marker */
    /* --- below this follows voice-only strings --- */
    VOICEONLY_DELIMITER = 0x8000,
MOO
    ;

for(@vfile) {
    print HFILE "    $_,\n";
}

print HFILE <<MOO
};
/* end of generated enum list */
MOO
    ;

print CFILE <<MOO
;
/* end of generated string list */
MOO
    ;

close(CFILE);
close(HFILE);

exit $errors;