1#!./perl
2
3my $PERLIO;
4
5BEGIN {
6    chdir 't' if -d 't';
7    @INC = '../lib';
8    require './test.pl';
9    unless (find PerlIO::Layer 'perlio') {
10	print "1..0 # Skip: not perlio\n";
11	exit 0;
12    }
13    eval 'use Encode';
14    if ($@ =~ /dynamic loading not available/) {
15        print "1..0 # miniperl cannot load Encode\n";
16	exit 0;
17    }
18    # Makes testing easier.
19    $ENV{PERLIO} = 'stdio' if exists $ENV{PERLIO} && $ENV{PERLIO} eq '';
20    if (exists $ENV{PERLIO} && $ENV{PERLIO} !~ /^(stdio|perlio|mmap)$/) {
21	# We are not prepared for anything else.
22	print "1..0 # PERLIO='$ENV{PERLIO}' unknown\n";
23	exit 0;
24    }
25    $PERLIO = exists $ENV{PERLIO} ? $ENV{PERLIO} : "(undef)";
26}
27
28use Config;
29
30my $DOSISH    = $^O =~ /^(?:MSWin32|os2|dos|NetWare|mint)$/ ? 1 : 0;
31   $DOSISH    = 1 if !$DOSISH and $^O =~ /^uwin/;
32my $NONSTDIO  = exists $ENV{PERLIO} && $ENV{PERLIO} ne 'stdio'     ? 1 : 0;
33my $FASTSTDIO = $Config{d_faststdio} && $Config{usefaststdio}      ? 1 : 0;
34
35my $NTEST = 43 - (($DOSISH || !$FASTSTDIO) ? 7 : 0) - ($DOSISH ? 5 : 0);
36
37plan tests => $NTEST;
38
39print <<__EOH__;
40# PERLIO    = $PERLIO
41# DOSISH    = $DOSISH
42# NONSTDIO  = $NONSTDIO
43# FASTSTDIO = $FASTSTDIO
44__EOH__
45
46SKIP: {
47    # FIXME - more of these could be tested without Encode or full perl
48    skip("This perl does not have Encode", $NTEST)
49	unless " $Config{extensions} " =~ / Encode /;
50    skip("miniperl does not have Encode", $NTEST) if $ENV{PERL_CORE_MINITEST};
51
52    sub check {
53	my ($result, $expected, $id) = @_;
54	# An interesting dance follows where we try to make the following
55	# IO layer stack setups to compare equal:
56	#
57	# PERLIO     UNIX-like                   DOS-like
58	#
59	# unset / "" unix perlio / stdio [1]     unix crlf
60	# stdio      unix perlio / stdio [1]     stdio
61	# perlio     unix perlio                 unix perlio
62	# mmap       unix mmap                   unix mmap
63	#
64	# [1] "stdio" if Configure found out how to do "fast stdio" (depends
65	# on the stdio implementation) and in Perl 5.8, otherwise "unix perlio"
66	#
67	if ($NONSTDIO) {
68	    # Get rid of "unix".
69	    shift @$result if $result->[0] eq "unix";
70	    # Change expectations.
71	    if ($FASTSTDIO) {
72		$expected->[0] = $ENV{PERLIO};
73	    } else {
74		$expected->[0] = $ENV{PERLIO} if $expected->[0] eq "stdio";
75	    }
76	} elsif (!$FASTSTDIO && !$DOSISH) {
77	    splice(@$result, 0, 2, "stdio")
78		if @$result >= 2 &&
79		   $result->[0] eq "unix" &&
80		   $result->[1] eq "perlio";
81	} elsif ($DOSISH) {
82	    splice(@$result, 0, 2, "stdio")
83		if @$result >= 2 &&
84		   $result->[0] eq "unix" &&
85		   $result->[1] eq "crlf";
86	}
87	if ($DOSISH && grep { $_ eq 'crlf' } @$expected) {
88	    # 5 tests potentially skipped because
89	    # DOSISH systems already have a CRLF layer
90	    # which will make new ones not stick.
91	    @$expected = grep { $_ ne 'crlf' } @$expected;
92	}
93	my $n = scalar @$expected;
94	is($n, scalar @$expected, "$id - layers == $n");
95	for (my $i = 0; $i < $n; $i++) {
96	    my $j = $expected->[$i];
97	    if (ref $j eq 'CODE') {
98		ok($j->($result->[$i]), "$id - $i is ok");
99	    } else {
100		is($result->[$i], $j,
101		   sprintf("$id - $i is %s",
102			   defined $j ? $j : "undef"));
103	    }
104	}
105    }
106
107    check([ PerlIO::get_layers(STDIN) ],
108	  [ "stdio" ],
109	  "STDIN");
110
111    open(F, ">:crlf", "afile");
112
113    check([ PerlIO::get_layers(F) ],
114	  [ qw(stdio crlf) ],
115	  "open :crlf");
116
117    binmode(F, ":encoding(sjis)"); # "sjis" will be canonized to "shiftjis"
118
119    check([ PerlIO::get_layers(F) ],
120	  [ qw[stdio crlf encoding(shiftjis) utf8] ],
121	  ":encoding(sjis)");
122    
123    binmode(F, ":pop");
124
125    check([ PerlIO::get_layers(F) ],
126	  [ qw(stdio crlf) ],
127	  ":pop");
128
129    binmode(F, ":raw");
130
131    check([ PerlIO::get_layers(F) ],
132	  [ "stdio" ],
133	  ":raw");
134
135    binmode(F, ":utf8");
136
137    check([ PerlIO::get_layers(F) ],
138	  [ qw(stdio utf8) ],
139	  ":utf8");
140
141    binmode(F, ":bytes");
142
143    check([ PerlIO::get_layers(F) ],
144	  [ "stdio" ],
145	  ":bytes");
146
147    binmode(F, ":encoding(utf8)");
148
149    check([ PerlIO::get_layers(F) ],
150	    [ qw[stdio encoding(utf8) utf8] ],
151	    ":encoding(utf8)");
152
153    binmode(F, ":raw :crlf");
154
155    check([ PerlIO::get_layers(F) ],
156	  [ qw(stdio crlf) ],
157	  ":raw:crlf");
158
159    binmode(F, ":raw :encoding(latin1)"); # "latin1" will be canonized
160
161    # 7 tests potentially skipped.
162    unless ($DOSISH || !$FASTSTDIO) {
163	my @results = PerlIO::get_layers(F, details => 1);
164
165	# Get rid of the args and the flags.
166	splice(@results, 1, 2) if $NONSTDIO;
167
168	check([ @results ],
169	      [ "stdio",    undef,        sub { $_[0] > 0 },
170		"encoding", "iso-8859-1", sub { $_[0] & PerlIO::F_UTF8() } ],
171	      ":raw:encoding(latin1)");
172    }
173
174    binmode(F);
175
176    check([ PerlIO::get_layers(F) ],
177	  [ "stdio" ],
178	  "binmode");
179
180    close F;
181
182    {
183	use open(IN => ":crlf", OUT => ":encoding(cp1252)");
184
185	open F, "<afile";
186	open G, ">afile";
187
188	check([ PerlIO::get_layers(F, input  => 1) ],
189	      [ qw(stdio crlf) ],
190	      "use open IN");
191	
192	check([ PerlIO::get_layers(G, output => 1) ],
193	      [ qw[stdio encoding(cp1252) utf8] ],
194	      "use open OUT");
195
196	close F;
197	close G;
198    }
199
200    1 while unlink "afile";
201}
202