# generate prototypes for rsync
use strict;

my $old_protos = '';
if (open(IN, '<', 'proto.h')) {
    $old_protos = join('', <IN>);
    close IN;
}

my %FN_MAP = (
    BOOL => 'BOOL ',
    CHAR => 'char ',
    INTEGER => 'int ',
    STRING => 'char *',
);

my $inheader = 0;
my $protos = qq|/* This file is automatically generated with "make proto". DO NOT EDIT */\n\n|;

while (<>) {
    if ($inheader) {
	if (/[)][ \t]*$/) {
	    $inheader = 0;
	    s/$/;/;
	}
	$protos .= $_;
    }

    if (/^FN_(LOCAL|GLOBAL)_([^(]+)\(([^,()]+)/) {
	my $ret = $FN_MAP{$2};
	my $func = $3;
	my $arg = $1 eq 'LOCAL' ? 'int ' : 'void';
	$protos .= "$ret$func($arg);\n";
    } elsif (/^static|^extern/ || /[;]/) {
	;
    } elsif (!/^[A-Za-z][A-Za-z0-9_]* /) {
	;
    } elsif (/[(].*[)][ \t]*$/) {
	s/$/;/;
	$protos .= $_;
    } elsif (/[(]/) {
	$inheader = 1;
	$protos .= $_;
    }
}

if ($old_protos ne $protos) {
    open(OUT, '>', 'proto.h') or die $!;
    print OUT $protos;
    close OUT;
}