2003-06-22 Paolo Carlini <pcarlini@unitus.it>
Nathan C. Myers <ncm-nospam@cantrip.org>
* include/std/std_streambuf.h (_M_move_out_cur): _M_out_lim
is now used only for filebuf, when _M_buf_unified is true.
epgtr() plays the role of _M_out_lim but it's only updated
upon overflow, underflow, uflow, seekoff/pos.
* include/bits/sstream.tcc (_M_underflow): New, implements
stringbuf::underflow and uflow.
(seekoff, seekpos): Tweak, use _M_update_egptr.
* include/std/std_sstream.h (str): Rewrote, deal correctly
with the new logic, in particular, when pptr() > egptr().
(_M_sync): When __testout && !__testin set all the get area
pointers to the current string end.
(_M_update_egptr): New, internal function updating egptr()
to the actual string end.
(_M_underflow): New, declare.
(underflow): Dispatch to _M_underflow(false).
(uflow): Dispatch to _M_underflow(true).
* include/bits/sstream.tcc (pbackfail, overflow, seekoff,
seekpos): Use only the documented derivation interface to
basic_streambuf (gptr(), setg(), etc.) to work right with
user specializations.
* include/std/std_sstream.h (str, _M_sync): Likewise.
From-SVN: r68347
2003-06-18 Nathan C. Myers <ncm-nospam@cantrip.org>
Paolo Carlini <pcarlini@unitus.it>
* include/bits/fstream.tcc (setbuf): Allow (__s, 1) too,
simply equivalent to the unbuffered case (0, 0) as far as
_M_buf_size is concerned.
Co-Authored-By: Paolo Carlini <pcarlini@unitus.it>
From-SVN: r68160
2003-06-13 Nathan C. Myers <ncm-nospam@cantrip.org>
Avoid multi-processor bus contention on increment/decrement-and-
test of the reference count in the empty-string object, by comparing
addresses first, and never touching the reference count of the empty-
string object.
* include/bits/basic_string.h:
(_S_empty_rep_storage): Move into basic_string<>::_Rep for use by its
members.
(_Rep::_S_empty_rep()): New accessor.
(_Rep::_M_length, _Rep::_M_capacity, _Rep::_M_references): Move to
a base class _Rep_base.
(_Rep::_M_dispose, _Rep::_M_refcopy): Check for the empty string.
(basic_string()): Change to use _M_refdata() in place of _M_refcopy(),
since no longer must increment its refcount.
* include/bits/basic_string.tcc:
(_Rep::_M_destroy, _M_leak_hard): Check for the empty string and
return immediately. The former might be unnecessary. The latter
prevents begin() and end() from cloning it unnecessarily.
(_S_construct(_InIterator, _InIterator, const _Alloc&,
input_iterator_tag), _S_construct(_InIterator, _InIterator,
const _Alloc&, forward_iterator_tag), _S_construct(size_type, _CharT,
const _Alloc&)): Change to use _M_refdata() in place of _M_refcopy().
(_M_mutate): Check for the empty string and treat it as shared.
This is necessary here because _M_mutate is sometimes called with
all-zero arguments; in all other uses of _M_is_shared, the test comes
out right anyhow.
From-SVN: r67912
2003-06-10 Paolo Carlini <pcarlini@unitus.it>
* include/bits/fstream.tcc (close): Clean up a bit.
* include/bits/streambuf.tcc (sbumpc): Clean up a bit.
* include/std/std_fstream.h (_M_destroy_pback): _M_pback_cur_save
- the saved _M_in_cur, that is - cannot be null.
(sync): Constify a variable.
* include/std/std_streambuf.h: Tweak a comment.
(in_avail): Constify a variable.
From-SVN: r67738
2003-06-09 Paolo Carlini <pcarlini@unitus.it>
* include/bits/fstream.tcc (_M_underflow): Do not special
case the unbuffered case, which really means simply a one char
get area.
(basic_filebuf): Initialize _M_buf_size.
(setbuf): Unbuffered means _M_buf_size == 1, since only
_M_buf_size - 1 == 0 chars are going to be used for the
put area and 1 for the get area.
* include/std/std_streambuf.h (_M_buf_size): Move to basic_filebuf.
(~basic_streambuf): Tweak.
(basic_streambuf): Do not initialize _M_buf_size.
* include/std/std_fstream.h (_M_buf_size): Add from basic_streambuf.
(~basic_filebuf): Tweak.
(_M_set_buffer): Tweak, considering that _M_buf_size == 1 is the
unbuffered situation (i.e., put area pointers NULL).
* include/bits/streambuf.tcc (sbumpc): Clean up.
* testsuite/27_io/basic_filebuf/sputbackc/char/1.cc: Split into...
* testsuite/27_io/basic_filebuf/sputbackc/char/1-in.cc: New.
* testsuite/27_io/basic_filebuf/sputbackc/char/1-io.cc: New.
* testsuite/27_io/basic_filebuf/sputbackc/char/1-out.cc: New.
* testsuite/27_io/basic_filebuf/sputbackc/char/2-in.cc: New.
* testsuite/27_io/basic_filebuf/sputbackc/char/2-io.cc: New.
* testsuite/27_io/basic_filebuf/sputbackc/char/2-out.cc: New.
From-SVN: r67686
* include/bits/stl_iterator.h
(reverse_iterator::reverse_iterator()): Apply DR235: default
constructor default-initializes data member. Instantiated on a
pointer type, the member has to end up equal to zero.
From-SVN: r67559
2003-06-02 Paolo Carlini <pcarlini@unitus.it>
* include/bits/sstream.tcc (pbackfail): Minor clean up and
reformatting, consistent with basic_filebuf::pbackfail.
From-SVN: r67342
2003-06-02 Paolo Carlini <pcarlini@unitus.it>
PR libstdc++/9761
* include/bits/fstream.tcc (pbackfail): If the pback buffer
is already active don't try to store in it a second char.
* testsuite/27_io/basic_filebuf/pbackfail/char/9761.cc: New.
* include/bits/fstream.tcc (pbackfail): Add unbuffered bits.
From-SVN: r67337
2003-06-02 Paolo Carlini <pcarlini@unitus.it>
* include/std/std_fstream.h (_M_destroy_pback): Use _M_in_beg
instead of unnecessarily taking the address of _M_pback.
(xsgetn): Simplify slightly for a single char pback buffer.
2003-06-02 Paolo Carlini <pcarlini@unitus.it>
* include/bits/sstream.tcc (seekoff): Remove four unnecessary
variables and two 'if', clean up.
2003-06-02 Paolo Carlini <pcarlini@unitus.it>
* include/bits/sstream.tcc (seekpos): Test against _M_out_lim
not _M_out_end, since the former actually points to the string
end (vs buffer end).
* testsuite/27_io/basic_stringbuf/seekpos/char/3.cc: New.
From-SVN: r67334
