source: codelist.pl

#! /usr/bin/perl

my $guard_symbol = "INC_BARNOWL_OWL_PROTOTYPES_H";
print "#ifndef $guard_symbol\n";
print "#define $guard_symbol\n";
foreach $file (@ARGV) {
    open(FILE, $file);

    print "/* -------------------------------- $file -------------------------------- */\n";
    while (<FILE>) {
        if (/^\S/
            && (/\{\s*$/ || /\)\s*$/)
            && !/\}/
            && !/^\{/
            && !/^#/
            && !/^static/
            && !/^system/
            && !/^XS/
            && !/\/\*/
            && !/ZWRITEOPTIONS/)
        {

            s/\s+\{/\;/;
            s/\)[ \t]*$/\)\;/;
            print "extern ";
            print;
        } elsif (/^#if/ || /^#else/ || /^#endif/) {
            print;
        }
            
    }
    close(FILE);
    print "\n";
}
print "#endif /* $guard_symbol */\n";