1#!./perl -w 2 3BEGIN { 4 chdir 't' if -d 't'; 5 @INC = qw(. ../lib); 6 require "test.pl"; 7 skip_all_without_perlio(); 8} 9 10use Config; 11 12 13my $file = tempfile(); 14 15my $ungetc_count = 8200; # Somewhat over the likely buffer size 16 17{ 18 plan(tests => 16 + 2 * $ungetc_count); 19 ok(open(FOO,">:crlf",$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_if_miniperl("miniperl can't rely on loading PerlIO::scalar", 36 2 * $ungetc_count + 1); 37 skip("no PerlIO::scalar", 2 * $ungetc_count + 1) 38 unless $Config{extensions} =~ m!\bPerlIO/scalar\b!; 39 require PerlIO::scalar; 40 my $fcontents = join "", map {"$_\015\012"} "a".."zzz"; 41 open my $fh, "<:crlf", \$fcontents; 42 local $/ = "xxx"; 43 local $_ = <$fh>; 44 my $pos = tell $fh; # pos must be behind "xxx", before "\nxxy\n" 45 seek $fh, $pos, 0; 46 $/ = "\n"; 47 $s = <$fh>.<$fh>; 48 is($s, "\nxxy\n"); 49 50 for my $i (0 .. $ungetc_count - 1) { 51 my $j = $i % 256; 52 is($fh->ungetc($j), $j, "ungetc of $j returns itself"); 53 } 54 55 for (my $i = $ungetc_count - 1; $i >= 0; $i--) { 56 my $j = $i % 256; 57 is(ord($fh->getc()), $j, "getc gets back $j"); 58 } 59 } 60 61 ok(close(FOO)); 62 63 # binmode :crlf should not cumulate. 64 # Try it first once and then twice so that even UNIXy boxes 65 # get to exercise this, for DOSish boxes even once is enough. 66 # Try also pushing :utf8 first so that there are other layers 67 # in between (this should not matter: CRLF layers still should 68 # not accumulate). 69 for my $utf8 ('', ':utf8') { 70 for my $binmode (1..2) { 71 open(FOO, ">$file"); 72 # require PerlIO; print PerlIO::get_layers(FOO), "\n"; 73 binmode(FOO, "$utf8:crlf") for 1..$binmode; 74 # require PerlIO; print PerlIO::get_layers(FOO), "\n"; 75 print FOO "Hello\n"; 76 close FOO; 77 open(FOO, "<$file"); 78 binmode(FOO); 79 my $foo = scalar <FOO>; 80 close FOO; 81 print join(" ", "#", map { sprintf("%02x", $_) } unpack("C*", $foo)), 82 "\n"; 83 like($foo, qr/\x0d\x0a$/); 84 unlike($foo, qr/\x0d\x0d/); 85 } 86 } 87} 88 89sub count_chars { 90 my($text, $chars) = @_; 91 my $seen = 0; 92 $seen++ while $text =~ /$chars/g; 93 return $seen; 94} 95