Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

libc/stdio: Allow fopen/freopen modes in any order (except initial r/w/a).

Austin Group issue #411 requires 'e' to be accepted before and after 'x',
and encourages accepting the characters in any order, except the initial
'r', 'w' or 'a'.

Given that glibc accepts the characters after r/w/a in any order and that
diagnosing this problem may be hard, change our libc to behave that way as
well.

libc/stdio: Run mkostemp test using prove.

libc/stdio: Provide proper TAP output for fmemopen/open_[w]memstream.

A *.t file should provide Test Anything Protocol output so that it can be
run using the Perl "prove" tool.

Add mkostemp() and mkostemps().

These are like mkstemp() and mkstemps() but allow passing open(2) flags like
O_CLOEXEC.

Add an implementation of open_memstream() and open_wmemstream(). These
routines provide write-only stdio FILE objects that store their data in a
dynamically allocated buffer. They are a string builder interface somewhat
akin to a completely dynamic sbuf.

Reviewed by: bde, jilles (earlier versions)
MFC after: 1 month

- Fix more style(9)-related issues (copyright header, spaces after function
names, unnecessary casts)
- Change type of boolean variable from char to bool

Suggested by: jhb, zont, jmallett
Reviewed by: cognet
Approved by: cognet

- Remove underscores from the internal structure name, as it doesn't collide
with the user's namespace.

- Correct size and position variables type from long to size_t.

- Do not set errno to ENOMEM on malloc failure, as malloc already does so.

- Implement the concept of "buffer data length", which mandates what SEEK_END
refers to and the allowed extent for a read.

- Use NULL as read-callback if the buffer is opened in write-only mode.
Conversely, use NULL as write-callback when opened in read-only mode.

- Implement the handling of the ``b'' character in the mode argument. A binary
buffer differs from a text buffer (default mode if ``b'' is omitted) in that
NULL bytes are never appended to writes and that the "buffer data length"
equals to the size of the buffer.

- Remove shall from the man page. Use indicative instead. Also, specify that
the ``b'' flag does not conform with POSIX but is supported by glibc.

- Update the regression test so that the ``b'' functionality and the "buffer
data length" concepts are tested.

- Minor style(9) corrections.

Suggested by: jilles
Reviewed by: cognet
Approved by: cognet

Add fmemopen(3), an interface to get a FILE * from a buffer in memory, along
with the respective regression test.
See http://pubs.opengroup.org/onlinepubs/9699919799/functions/fmemopen.html

Reviewed by: cognet
Approved by: cognet

libc: Add a missing header to a test program.

Usage of dup(), mkstemp() and unlink() needs <unistd.h>.

Add .t files for tests, missed in prior checkins, so that prove(1) works
in this directory.

Update the tests for arm and other ports where long double is the same
as double, similar to r178141.

Regression tests for r197752 (handling of empty/NULL buffers).

Return -1 instead of 0 upon reaching EOF. This is somewhat ill-advised
because it means getdelim() returns -1 for both error and EOF, and
never returns 0. However, this is what the original GNU implementation
does, and POSIX inherited the bug.

Reported by: marcus@

Tests for getdelim().

Add a file containing tests for simple format specifiers.
Currently it only has tests for a few sign issues with integer
formats, including PR 131880.

Test wprintf() in addition to printf().

Regression tests for bugs in gdtoa.

Add some regression tests for printf() with positional arguments.
The first test comes from OpenBSD, and the others are additions or
adaptations.

This is based on OpenBSD's
src/regress/lib/libc/sprintf/sprintf_test.c, v1.3.
I deliberately did not use v1.4 because it's bogus.

Regression test for a recently fixed strtod bug.

Updates for changes in the way printf() handles hex floating point
numbers.

Remove some test instrumentation. (The Symbol.map changes broke it anyway.)

Make sure we set the locale to "C" when testing thousands' separator
support, rather than just "", which refers to the system default based
on the environment.

Tests for rounding, and for the leading 0's bug.

Remove the test that ensures that when the string "nan(...)" is converted
to floating-point, the result is a quiet NaN. The current implementation
may return a signaling NaN, and the vendor has no plans for changing this,
for reasons explained in the comment I added.

Fix cut-and-paste bugs in the regression tests.

- Split tests into three rough categories.
- Use fesetround() instead of fpsetround(), and add tests for
various rounding modes.
- Test that all NaNs generated are quiet.

Some of these tests won't pass until problems in vendor sources
(gdtoa and gcc) are fixed and new versions imported, but I
want to get these changes into the tree before I accidentally
blow them away again. :-(

- Split the printfloat test into 11 individually wrapped and packaged
tests. (Buy 10, get one free!) The separate categories were
already there; they just weren't labeled.
- Use fesetround() instead of fpsetround(), since the former is
standard and implemented on all supported architectures. Add
tests for each rounding mode.
- Add additional tests for subnormals.

Some of these tests won't pass until problems in vendor sources
(gdtoa and gcc) are fixed and new versions imported, but I
want to get these changes into the tree before I accidentally
blow them away.

Switch over to a different, more flexible test output protocol that's
understood by Perl's Test::Harness module and prove(1) commands.

Update README to describe the new protocol. The work's broken down into
two main sets of changes.

First, update the existing test programs (shell scripts and C programs)
to produce output in the ok/not ok format, and to, where possible, also
produce a header describing the number of tests that are expected to be
run.

Second, provide the .t files that actually run the tests. In some cases
these are copies of, or very similar too, scripts that already existed.
I've kept the old scripts around so that it's possible to verify that
behaviour under this new system (in terms of whether or not a test fails)
is identical to the behaviour under the old system.

Add a TODO file.

Add a regression test for floating-point output in the Greek locale.
See revision 1.3 of src/share/numericdef/el_GR.ISO8859-7.src

Reviewed by: das (a while ago)

Add regression tests for printf's %a/%A formats.

While here, disable some of the long double tests on i386, since
FreeBSD/i386 is the only port that doesn't evaluate long doubles in
their full precision (due to constant folding bugs in gcc).

Add regression tests for some of the bugs recently discovered in the
vendor's strtod() implementation.

While here, disable some of the long double tests on i386, since
FreeBSD/i386 is the only port that doesn't evaluate long doubles in
their full precision (due to constant folding bugs in gcc).

Work around a recently-introduced gcc bug. The compiler no longer
accepts certain floating point constant representations that are
legal in C99.

Add regression tests for floating point parsing in scanf(3).

Add a dozen new tests with the general theme of getting trailing
zeroes right.

Add a test case for printf("%5.0f", 0.001).

Additional regression tests for grouping, parsing of '.*', and printing
of %f formats where the number of significant digits is < expt.

Test for bug in revision 1.54 of vfprintf.c.

Regression tests for printf()'s floating point formats.
Tests for correct printing of subnormals are lacking.

Add a test program for perror() that demonstrates two bugs in the
current implementation.