#! /usr/bin/env perl
# Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
#
# Licensed under the OpenSSL license (the "License").  You may not use
# this file except in compliance with the License.  You can obtain a copy
# in the file LICENSE in the source distribution or at
# https://www.openssl.org/source/license.html

# This is just a quick script to scan for cases where the 'error'
# function name in a XXXerr() macro is wrong.
# 
# Run in the top level by going
# perl util/ck_errf.pl */*.c */*/*.c
#

my $err_strict = 0;
my $bad = 0;

foreach $file (@ARGV)
	{
	if ($file eq "-strict")
		{
		$err_strict = 1;
		next;
		}
	open(IN,"<$file") || die "unable to open $file\n";
	$func="";
	while (<IN>)
		{
		if (!/;$/ && /^\**([a-zA-Z_].*[\s*])?([A-Za-z_0-9]+)\(.*([),]|$)/)
			{
			/^([^()]*(\([^()]*\)[^()]*)*)\(/;
			$1 =~ /([A-Za-z_0-9]*)$/;
			$func = $1;
			$func =~ tr/A-Z/a-z/;
			}
		if (/([A-Z0-9]+)err\(([^,]+)/ && ! /ckerr_ignore/)
			{
			$errlib=$1;
			$n=$2;

			if ($func eq "")
				{ print "$file:$.:???:$n\n"; $bad = 1; next; }

			if ($n !~ /([^_]+)_F_(.+)$/)
				{
		#		print "check -$file:$.:$func:$n\n";
				next;
				}
			$lib=$1;
			$n=$2;

			if ($lib ne $errlib)
				{ print "$file:$.:$func:$n [${errlib}err]\n"; $bad = 1; next; }

			$n =~ tr/A-Z/a-z/;
			if (($n ne $func) && ($errlib ne "SYS"))
				{ print "$file:$.:$func:$n\n"; $bad = 1; next; }
	#		print "$func:$1\n";
			}
		}
	close(IN);
        }

if ($bad && $err_strict)
	{
	print STDERR "FATAL: error discrepancy\n";
	exit 1;
	}