1#!./perl 2 3BEGIN { 4 chdir 't'; 5 @INC = '../lib'; 6 require './test.pl'; 7} 8use strict; 9 10plan tests => 2564; 11 12open(FOO,'op/read.t') || open(FOO,'t/op/read.t') || open(FOO,':op:read.t') || die "Can't open op.read"; 13seek(FOO,4,0) or die "Seek failed: $!"; 14my $buf; 15my $got = read(FOO,$buf,4); 16 17is ($got, 4); 18is ($buf, "perl"); 19 20seek (FOO,0,2) || seek(FOO,20000,0); 21$got = read(FOO,$buf,4); 22 23is ($got, 0); 24is ($buf, ""); 25 26# This is true if Config is not built, or if PerlIO is enabled 27# ie assume that PerlIO is present, unless we know for sure otherwise. 28my $has_perlio = !eval { 29 no warnings; 30 require Config; 31 !$Config::Config{useperlio} 32}; 33 34my $tmpfile = tempfile(); 35 36my (@values, @buffers) = ('', ''); 37 38foreach (65, 161, 253, 9786) { 39 push @values, join "", map {chr $_} $_ .. $_ + 4; 40 push @buffers, join "", map {chr $_} $_ + 5 .. $_ + 20; 41} 42my @offsets = (0, 3, 7, 22, -1, -3, -5, -7); 43my @lengths = (0, 2, 5, 10); 44 45foreach my $value (@values) { 46 foreach my $initial_buffer (@buffers) { 47 my @utf8 = 1; 48 if ($value !~ tr/\0-\377//c) { 49 # It's all 8 bit 50 unshift @utf8, 0; 51 } 52 SKIP: 53 foreach my $utf8 (@utf8) { 54 skip "Needs :utf8 layer but no perlio", 2 * @offsets * @lengths 55 if $utf8 and !$has_perlio; 56 57 open FH, ">$tmpfile" or die "Can't open $tmpfile: $!"; 58 binmode FH, "utf8" if $utf8; 59 print FH $value; 60 close FH; 61 foreach my $offset (@offsets) { 62 foreach my $length (@lengths) { 63 # Will read the lesser of the length of the file and the 64 # read length 65 my $will_read = $value; 66 if ($length < length $will_read) { 67 substr ($will_read, $length) = ''; 68 } 69 # Going to trash this so need a copy 70 my $buffer = $initial_buffer; 71 72 my $expect = $buffer; 73 if ($offset > 0) { 74 # Right pad with NUL bytes 75 $expect .= "\0" x $offset; 76 substr ($expect, $offset) = ''; 77 } 78 substr ($expect, $offset) = $will_read; 79 80 open FH, $tmpfile or die "Can't open $tmpfile: $!"; 81 binmode FH, "utf8" if $utf8; 82 my $what = sprintf "%d into %d l $length o $offset", 83 ord $value, ord $buffer; 84 $what .= ' u' if $utf8; 85 $got = read (FH, $buffer, $length, $offset); 86 is ($got, length $will_read, "got $what"); 87 is ($buffer, $expect, "buffer $what"); 88 close FH; 89 } 90 } 91 } 92 } 93} 94 95 96 97