| 1 | #!./perl |
| 2 | |
| 3 | BEGIN { |
| 4 | chdir 't' if -d 't'; |
| 5 | require './test.pl'; |
| 6 | set_up_inc('../lib'); |
| 7 | } |
| 8 | |
| 9 | plan (tests => 41); |
| 10 | |
| 11 | print "not " unless length("") == 0; |
| 12 | print "ok 1\n"; |
| 13 | |
| 14 | print "not " unless length("abc") == 3; |
| 15 | print "ok 2\n"; |
| 16 | |
| 17 | $_ = "foobar"; |
| 18 | print "not " unless length() == 6; |
| 19 | print "ok 3\n"; |
| 20 | |
| 21 | # Okay, so that wasn't very challenging. Let's go Unicode. |
| 22 | |
| 23 | { |
| 24 | my $a = "\x{41}"; |
| 25 | |
| 26 | print "not " unless length($a) == 1; |
| 27 | print "ok 4\n"; |
| 28 | $test++; |
| 29 | |
| 30 | use bytes; |
| 31 | print "not " unless $a eq "\x41" && length($a) == 1; |
| 32 | print "ok 5\n"; |
| 33 | $test++; |
| 34 | } |
| 35 | |
| 36 | { |
| 37 | my $a = pack("U", 0xFF); |
| 38 | |
| 39 | print "not " unless length($a) == 1; |
| 40 | print "ok 6\n"; |
| 41 | $test++; |
| 42 | |
| 43 | use bytes; |
| 44 | if (ord('A') == 193) |
| 45 | { |
| 46 | printf "#%vx for 0xFF\n",$a; |
| 47 | print "not " unless $a eq "\x8b\x73" && length($a) == 2; |
| 48 | } |
| 49 | else |
| 50 | { |
| 51 | print "not " unless $a eq "\xc3\xbf" && length($a) == 2; |
| 52 | } |
| 53 | print "ok 7\n"; |
| 54 | $test++; |
| 55 | } |
| 56 | |
| 57 | { |
| 58 | my $a = "\x{100}"; |
| 59 | |
| 60 | print "not " unless length($a) == 1; |
| 61 | print "ok 8\n"; |
| 62 | $test++; |
| 63 | |
| 64 | use bytes; |
| 65 | if (ord('A') == 193) |
| 66 | { |
| 67 | printf "#%vx for 0x100\n",$a; |
| 68 | print "not " unless $a eq "\x8c\x41" && length($a) == 2; |
| 69 | } |
| 70 | else |
| 71 | { |
| 72 | print "not " unless $a eq "\xc4\x80" && length($a) == 2; |
| 73 | } |
| 74 | print "ok 9\n"; |
| 75 | $test++; |
| 76 | } |
| 77 | |
| 78 | { |
| 79 | my $a = "\x{100}\x{80}"; |
| 80 | |
| 81 | print "not " unless length($a) == 2; |
| 82 | print "ok 10\n"; |
| 83 | $test++; |
| 84 | |
| 85 | use bytes; |
| 86 | if (ord('A') == 193) |
| 87 | { |
| 88 | printf "#%vx for 0x100 0x80\n",$a; |
| 89 | print "not " unless $a eq "\x8c\x41\x8a\x67" && length($a) == 4; |
| 90 | } |
| 91 | else |
| 92 | { |
| 93 | print "not " unless $a eq "\xc4\x80\xc2\x80" && length($a) == 4; |
| 94 | } |
| 95 | print "ok 11\n"; |
| 96 | $test++; |
| 97 | } |
| 98 | |
| 99 | { |
| 100 | my $a = "\x{80}\x{100}"; |
| 101 | |
| 102 | print "not " unless length($a) == 2; |
| 103 | print "ok 12\n"; |
| 104 | $test++; |
| 105 | |
| 106 | use bytes; |
| 107 | if (ord('A') == 193) |
| 108 | { |
| 109 | printf "#%vx for 0x80 0x100\n",$a; |
| 110 | print "not " unless $a eq "\x8a\x67\x8c\x41" && length($a) == 4; |
| 111 | } |
| 112 | else |
| 113 | { |
| 114 | print "not " unless $a eq "\xc2\x80\xc4\x80" && length($a) == 4; |
| 115 | } |
| 116 | print "ok 13\n"; |
| 117 | $test++; |
| 118 | } |
| 119 | |
| 120 | # Now for Unicode with magical vtbls |
| 121 | |
| 122 | { |
| 123 | require Tie::Scalar; |
| 124 | my $a; |
| 125 | tie $a, 'Tie::StdScalar'; # makes $a magical |
| 126 | $a = "\x{263A}"; |
| 127 | |
| 128 | print "not " unless length($a) == 1; |
| 129 | print "ok 14\n"; |
| 130 | $test++; |
| 131 | |
| 132 | use bytes; |
| 133 | print "not " unless length($a) == 3; |
| 134 | print "ok 15\n"; |
| 135 | $test++; |
| 136 | } |
| 137 | |
| 138 | { |
| 139 | # Play around with Unicode strings, |
| 140 | # give a little workout to the UTF-8 length cache. |
| 141 | my $a = chr(256) x 100; |
| 142 | print length $a == 100 ? "ok 16\n" : "not ok 16\n"; |
| 143 | chop $a; |
| 144 | print length $a == 99 ? "ok 17\n" : "not ok 17\n"; |
| 145 | $a .= $a; |
| 146 | print length $a == 198 ? "ok 18\n" : "not ok 18\n"; |
| 147 | $a = chr(256) x 999; |
| 148 | print length $a == 999 ? "ok 19\n" : "not ok 19\n"; |
| 149 | substr($a, 0, 1) = ''; |
| 150 | print length $a == 998 ? "ok 20\n" : "not ok 20\n"; |
| 151 | } |
| 152 | |
| 153 | curr_test(21); |
| 154 | |
| 155 | require Tie::Scalar; |
| 156 | |
| 157 | $u = "ASCII"; |
| 158 | |
| 159 | tie $u, 'Tie::StdScalar', chr 256; |
| 160 | |
| 161 | is(length $u, 1, "Length of a UTF-8 scalar returned from tie"); |
| 162 | is(length $u, 1, "Again! Again!"); |
| 163 | |
| 164 | $^W = 1; |
| 165 | |
| 166 | my $warnings = 0; |
| 167 | |
| 168 | $SIG{__WARN__} = sub { |
| 169 | $warnings++; |
| 170 | warn @_; |
| 171 | }; |
| 172 | |
| 173 | is(length(undef), undef, "Length of literal undef"); |
| 174 | |
| 175 | my $u; |
| 176 | |
| 177 | is(length($u), undef, "Length of regular scalar"); |
| 178 | |
| 179 | $u = "Gotcha!"; |
| 180 | |
| 181 | tie $u, 'Tie::StdScalar'; |
| 182 | |
| 183 | is(length($u), undef, "Length of tied scalar (MAGIC)"); |
| 184 | |
| 185 | is($u, undef); |
| 186 | |
| 187 | { |
| 188 | package U; |
| 189 | use overload '""' => sub {return undef;}; |
| 190 | } |
| 191 | |
| 192 | my $uo = bless [], 'U'; |
| 193 | |
| 194 | { |
| 195 | my $w; |
| 196 | local $SIG{__WARN__} = sub { $w = shift }; |
| 197 | is(length($uo), 0, "Length of overloaded reference"); |
| 198 | like $w, qr/uninitialized/, 'uninit warning for stringifying as undef'; |
| 199 | } |
| 200 | |
| 201 | my $ul = 3; |
| 202 | is(($ul = length(undef)), undef, |
| 203 | "Returned length of undef with result in TARG"); |
| 204 | is($ul, undef, "Assigned length of undef with result in TARG"); |
| 205 | |
| 206 | $ul = 3; |
| 207 | is(($ul = length($u)), undef, |
| 208 | "Returned length of tied undef with result in TARG"); |
| 209 | is($ul, undef, "Assigned length of tied undef with result in TARG"); |
| 210 | |
| 211 | $ul = 3; |
| 212 | { |
| 213 | my $w; |
| 214 | local $SIG{__WARN__} = sub { $w = shift }; |
| 215 | is(($ul = length($uo)), 0, |
| 216 | "Returned length of overloaded undef with result in TARG"); |
| 217 | like $w, qr/uninitialized/, 'uninit warning for stringifying as undef'; |
| 218 | } |
| 219 | is($ul, 0, "Assigned length of overloaded undef with result in TARG"); |
| 220 | |
| 221 | { |
| 222 | my $y = "\x{100}BC"; |
| 223 | is(index($y, "B"), 1, 'adds an intermediate position to the offset cache'); |
| 224 | is(length $y, 3, |
| 225 | 'Check that sv_len_utf8() can take advantage of the offset cache'); |
| 226 | } |
| 227 | |
| 228 | { |
| 229 | local $SIG{__WARN__} = sub { |
| 230 | pass("'print length undef' warned"); |
| 231 | }; |
| 232 | print length undef; |
| 233 | } |
| 234 | |
| 235 | { |
| 236 | local $SIG{__WARN__} = sub { |
| 237 | pass '[perl #106726] no crash with length @lexical warning' |
| 238 | }; |
| 239 | eval ' sub { length my @forecasts } '; |
| 240 | } |
| 241 | |
| 242 | # length could be fooled by UTF8ness of non-magical variables changing with |
| 243 | # stringification. |
| 244 | my $ref = []; |
| 245 | bless $ref, "\x{100}"; |
| 246 | is length $ref, length "$ref", 'length on reference blessed to utf8 class'; |
| 247 | |
| 248 | is($warnings, 0, "There were no other warnings"); |