1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
|
#!./perl
use warnings;
use strict;
BEGIN {
chdir 't' if -d 't';
require './test.pl';
require './charset_tools.pl';
set_up_inc('../lib');
}
plan (tests => 46 + 3 * $::IS_ASCII);
is(length(""), 0);
is(length("abc"), 3);
$_ = "foobar";
is(length(), 6);
# Okay, so that wasn't very challenging. Let's go Unicode.
{
my $a = "\x{41}";
is(length($a), 1);
use bytes;
ok($a eq "\x41");
is(length($a), 1);
}
if ($::IS_ASCII) { # Generally UTF-8 invariant on EBCDIC, so skip there
my $a = pack("U", 0xFF);
is(length($a), 1);
use bytes;
ok($a eq byte_utf8a_to_utf8n("\xc3\xbf"));
is(length($a), 2);
}
{
my $a = pack("U", 0xB6); # Works on both ASCII and EBCDIC
is(length($a), 1);
use bytes;
ok($a eq byte_utf8a_to_utf8n("\xc2\xb6"));
is(length($a), 2);
}
{
my $a = "\x{100}";
is(length($a), 1);
use bytes;
ok($a eq byte_utf8a_to_utf8n("\xc4\x80"));
is(length($a), 2);
}
{
my $a = "\x{100}\x{B6}";
is(length($a), 2);
use bytes;
ok($a eq byte_utf8a_to_utf8n("\xc4\x80\xc2\xb6"));
is(length($a), 4);
}
{
my $a = "\x{b6}\x{100}";
is(length($a), 2);
use bytes;
ok($a eq byte_utf8a_to_utf8n("\xc2\xb6\xc4\x80"));
is(length($a), 4);
}
# Now for Unicode with magical vtbls
{
require Tie::Scalar;
my $a;
tie $a, 'Tie::StdScalar'; # makes $a magical
$a = "\x{263A}";
is(length($a), 1);
use bytes;
is(length($a), 3);
}
{
# Play around with Unicode strings,
# give a little workout to the UTF-8 length cache.
my $a = chr(256) x 100;
is(length $a, 100);
chop $a;
is(length $a, 99);
$a .= $a;
is(length $a, 198);
$a = chr(256) x 999;
is(length $a, 999);
substr($a, 0, 1) = '';
is(length $a, 998);
}
require Tie::Scalar;
my $u = "ASCII";
tie $u, 'Tie::StdScalar', chr 256;
is(length $u, 1, "Length of a UTF-8 scalar returned from tie");
is(length $u, 1, "Again! Again!");
$^W = 1;
my $warnings = 0;
$SIG{__WARN__} = sub {
$warnings++;
warn @_;
};
is(length(undef), undef, "Length of literal undef");
undef $u;
is(length($u), undef, "Length of regular scalar");
$u = "Gotcha!";
tie $u, 'Tie::StdScalar';
is(length($u), undef, "Length of tied scalar (MAGIC)");
is($u, undef);
{
package U;
use overload '""' => sub {return undef;};
}
my $uo = bless [], 'U';
{
my $w;
local $SIG{__WARN__} = sub { $w = shift };
is(length($uo), 0, "Length of overloaded reference");
like $w, qr/uninitialized/, 'uninit warning for stringifying as undef';
}
my $ul = 3;
is(($ul = length(undef)), undef,
"Returned length of undef with result in TARG");
is($ul, undef, "Assigned length of undef with result in TARG");
$ul = 3;
is(($ul = length($u)), undef,
"Returned length of tied undef with result in TARG");
is($ul, undef, "Assigned length of tied undef with result in TARG");
$ul = 3;
{
my $w;
local $SIG{__WARN__} = sub { $w = shift };
is(($ul = length($uo)), 0,
"Returned length of overloaded undef with result in TARG");
like $w, qr/uninitialized/, 'uninit warning for stringifying as undef';
}
is($ul, 0, "Assigned length of overloaded undef with result in TARG");
{
my $y = "\x{100}BC";
is(index($y, "B"), 1, 'adds an intermediate position to the offset cache');
is(length $y, 3,
'Check that sv_len_utf8() can take advantage of the offset cache');
}
{
local $SIG{__WARN__} = sub {
pass("'print length undef' warned");
};
print length undef;
}
{
local $SIG{__WARN__} = sub {
pass '[perl #106726] no crash with length @lexical warning'
};
eval ' sub { length my @forecasts } ';
}
# length could be fooled by UTF8ness of non-magical variables changing with
# stringification.
my $ref = [];
bless $ref, "\x{100}";
is length $ref, length "$ref", 'length on reference blessed to utf8 class';
is($warnings, 0, "There were no other warnings");
|
