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* io.c (io_unread): fix IO#pos with mode 'r' bug on Windows.

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If the end of reading buffer is CR, io_unread() needs to unread one
  more byte.
  [ruby-core:44874] [Bug #6401]

* test/ruby/test_io_m17n.rb (TestIO_M17N#test_pos_with_buffer_end_cr):
  add a test for above.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@35594 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
shirosaki 2012-05-08 12:01:05 +00:00
parent c45d780b83
commit 7e134cf71e
3 changed files with 32 additions and 0 deletions
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10
ChangeLog
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@ -1,3 +1,13 @@
Tue May 8 20:44:46 2012 Hiroshi Shirosaki <h.shirosaki@gmail.com>
* io.c (io_unread): fix IO#pos with mode 'r' bug on Windows.
If the end of reading buffer is CR, io_unread() needs to unread one
more byte.
[ruby-core:44874] [Bug #6401]
* test/ruby/test_io_m17n.rb (TestIO_M17N#test_pos_with_buffer_end_cr):
add a test for above.
Tue May 8 13:38:17 2012 Ayumu AIZAWA <ayumu.aizawa@gmail.com>
* ext/date/date_core.c: improving introduction in Date/DateTime

6
io.c
View file

@ -457,6 +457,12 @@ io_unread(rb_io_t *fptr)
/* add extra offset for removed '\r' in rbuf */
extra_max = (long)(pos - fptr->rbuf.len);
p = fptr->rbuf.ptr + fptr->rbuf.off;
/* if the end of rbuf is '\r', rbuf doesn't have '\r' within rbuf.len */
if (*(fptr->rbuf.ptr + fptr->rbuf.capa - 1) == '\r') {
newlines++;
}
for (i = 0; i < fptr->rbuf.len; i++) {
if (*p == '\n') newlines++;
if (extra_max == newlines) break;

16
test/ruby/test_io_m17n.rb
View file

@ -2432,6 +2432,22 @@ EOT
}
end if /mswin|mingw/ =~ RUBY_PLATFORM
def test_pos_with_buffer_end_cr
bug6401 = '[ruby-core:44874]'
with_tmpdir {
# Read buffer size is 8191. This generates '\r' at 8191.
lines = ["X" * 8187, "X"]
generate_file("tmp", lines.join("\r\n") + "\r\n")
open("tmp", "r") do |f|
lines.each do |line|
f.pos
assert_equal(line, f.readline.chomp, bug6401)
end
end
}
end if /mswin|mingw/ =~ RUBY_PLATFORM
def test_read_crlf_and_eof
bug6271 = '[ruby-core:44189]'
with_tmpdir {