#!./perl
-# $RCSfile: read.t,v $$Revision: 4.1 $$Date: 92/08/07 18:28:17 $
+BEGIN {
+ chdir 't';
+ @INC = '../lib';
+ require './test.pl';
+}
+use strict;
-print "1..4\n";
+plan tests => 2564;
+open(FOO,'op/read.t') || open(FOO,'t/op/read.t') || open(FOO,':op:read.t') || die "Can't open op.read";
+seek(FOO,4,0) or die "Seek failed: $!";
+my $buf;
+my $got = read(FOO,$buf,4);
-open(FOO,'op/read.t') || open(FOO,'t/op/read.t') || die "Can't open op.read";
-seek(FOO,4,0);
+is ($got, 4);
+is ($buf, "perl");
+
+seek (FOO,0,2) || seek(FOO,20000,0);
$got = read(FOO,$buf,4);
-print ($got == 4 ? "ok 1\n" : "not ok 1\n");
-print ($buf eq "perl" ? "ok 2\n" : "not ok 2 :$buf:\n");
+is ($got, 0);
+is ($buf, "");
+
+# This is true if Config is not built, or if PerlIO is enabled
+# ie assume that PerlIO is present, unless we know for sure otherwise.
+my $has_perlio = !eval {
+ no warnings;
+ require Config;
+ !$Config::Config{useperlio}
+};
+
+my $tmpfile = 'Op_read.tmp';
+
+END { 1 while unlink $tmpfile }
+
+my (@values, @buffers) = ('', '');
+
+foreach (65, 161, 253, 9786) {
+ push @values, join "", map {chr $_} $_ .. $_ + 4;
+ push @buffers, join "", map {chr $_} $_ + 5 .. $_ + 20;
+}
+my @offsets = (0, 3, 7, 22, -1, -3, -5, -7);
+my @lengths = (0, 2, 5, 10);
+
+foreach my $value (@values) {
+ foreach my $initial_buffer (@buffers) {
+ my @utf8 = 1;
+ if ($value !~ tr/\0-\377//c) {
+ # It's all 8 bit
+ unshift @utf8, 0;
+ }
+ SKIP:
+ foreach my $utf8 (@utf8) {
+ skip "Needs :utf8 layer but no perlio", 2 * @offsets * @lengths
+ if $utf8 and !$has_perlio;
+
+ 1 while unlink $tmpfile;
+ open FH, ">$tmpfile" or die "Can't open $tmpfile: $!";
+ binmode FH, "utf8" if $utf8;
+ print FH $value;
+ close FH;
+ foreach my $offset (@offsets) {
+ foreach my $length (@lengths) {
+ # Will read the lesser of the length of the file and the
+ # read length
+ my $will_read = $value;
+ if ($length < length $will_read) {
+ substr ($will_read, $length) = '';
+ }
+ # Going to trash this so need a copy
+ my $buffer = $initial_buffer;
+
+ my $expect = $buffer;
+ if ($offset > 0) {
+ # Right pad with NUL bytes
+ $expect .= "\0" x $offset;
+ substr ($expect, $offset) = '';
+ }
+ substr ($expect, $offset) = $will_read;
+
+ open FH, $tmpfile or die "Can't open $tmpfile: $!";
+ binmode FH, "utf8" if $utf8;
+ my $what = sprintf "%d into %d l $length o $offset",
+ ord $value, ord $buffer;
+ $what .= ' u' if $utf8;
+ $got = read (FH, $buffer, $length, $offset);
+ is ($got, length $will_read, "got $what");
+ is ($buffer, $expect, "buffer $what");
+ close FH;
+ }
+ }
+ }
+ }
+}
+
-seek(FOO,20000,0);
-$got = read(FOO,$buf,4);
-print ($got == 0 ? "ok 3\n" : "not ok 3\n");
-print ($buf eq "" ? "ok 4\n" : "not ok 4\n");