#!/usr/bin/perl
# Re-generate symbol renaming defines
# (c) 2013 Martin Mares <mj@ucw.cz>

use common::sense;

my %renames = ();
open my $f, '<', 'tools/libucw.api' or die;
my $current;
while (<$f>) {
	chomp;
	if (/^#\s*(.*)/) {
		$current = $1;
	} else {
		push @{$renames{$current}}, $_;
	}
}
close $f;

for my $g (sort keys %renames) {
	my @symbols = sort @{$renames{$g}};
	@symbols or next;
	print "### $g\n";

	open my $in, '<', $g or die;
	open my $out, '>', "$g.new" or die;
	my $mode = 0;
	my $cmt = 0;
	while (<$in>) {
		if (!$mode) {
			if (m{^/\*$} && !$cmt) {
				$cmt = 1;
			} elsif (m{^\s} ||
			    m{^#include\s} ||
			    m{^#define\s+_} ||
			    m{^#ifndef\s+_} ||
			    m{^\s*$}
			   ) {
				# Waiting for the right spot
			} elsif (m{^#ifdef CONFIG_UCW_CLEAN_ABI$}) {
				$mode = 2;
				next;
			} else {
				$mode = 1;
				print $out "#ifdef CONFIG_UCW_CLEAN_ABI\n";
				for my $sym (@symbols) {
					print $out "#define $sym ucw_$sym\n";
				}
				print $out "#endif\n\n";
			}
		} elsif ($mode == 2) {
			if (m{^$}) {
				$mode = 0;
			}
			next;
		}
		print $out "$_";
	}
	$mode or die;
	close $out;
	close $in;
	rename "$g.new", $g or die;
}