1#!./perl -w
2
3BEGIN {
4    chdir 't' if -d 't';
5    @INC = qw(. ../lib);
6}
7
8use Config;
9
10require "test.pl";
11
12my $file = "crlf$$.dat";
13END {
14    1 while unlink($file);
15}
16
17if (find PerlIO::Layer 'perlio') {
18    plan(tests => 16);
19    ok(open(FOO,">:crlf",$file));
20    ok(print FOO 'a'.((('a' x 14).qq{\n}) x 2000) || close(FOO));
21    ok(open(FOO,"<:crlf",$file));
22
23    my $text;
24    { local $/; $text = <FOO> }
25    is(count_chars($text, "\015\012"), 0);
26    is(count_chars($text, "\n"), 2000);
27
28    binmode(FOO);
29    seek(FOO,0,0);
30    { local $/; $text = <FOO> }
31    is(count_chars($text, "\015\012"), 2000);
32
33    SKIP:
34    {
35	skip("miniperl can't rely on loading PerlIO::scalar")
36	if $ENV{PERL_CORE_MINITEST};
37	skip("no PerlIO::scalar") unless $Config{extensions} =~ m!\bPerlIO/scalar\b!;
38	require PerlIO::scalar;
39	my $fcontents = join "", map {"$_\015\012"} "a".."zzz";
40	open my $fh, "<:crlf", \$fcontents;
41	local $/ = "xxx";
42	local $_ = <$fh>;
43	my $pos = tell $fh; # pos must be behind "xxx", before "\nxxy\n"
44	seek $fh, $pos, 0;
45	$/ = "\n";
46	$s = <$fh>.<$fh>;
47	ok($s eq "\nxxy\n");
48    }
49
50    ok(close(FOO));
51
52    # binmode :crlf should not cumulate.
53    # Try it first once and then twice so that even UNIXy boxes
54    # get to exercise this, for DOSish boxes even once is enough.
55    # Try also pushing :utf8 first so that there are other layers
56    # in between (this should not matter: CRLF layers still should
57    # not accumulate).
58    for my $utf8 ('', ':utf8') {
59	for my $binmode (1..2) {
60	    open(FOO, ">$file");
61	    # require PerlIO; print PerlIO::get_layers(FOO), "\n";
62	    binmode(FOO, "$utf8:crlf") for 1..$binmode;
63	    # require PerlIO; print PerlIO::get_layers(FOO), "\n";
64	    print FOO "Hello\n";
65	    close FOO;
66	    open(FOO, "<$file");
67	    binmode(FOO);
68	    my $foo = scalar <FOO>;
69	    close FOO;
70	    print join(" ", "#", map { sprintf("%02x", $_) } unpack("C*", $foo)),
71	    "\n";
72	    ok($foo =~ /\x0d\x0a$/);
73	    ok($foo !~ /\x0d\x0d/);
74	}
75    }
76}
77else {
78    skip_all("No perlio, so no :crlf");
79}
80
81sub count_chars {
82    my($text, $chars) = @_;
83    my $seen = 0;
84    $seen++ while $text =~ /$chars/g;
85    return $seen;
86}
87