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History log of /src/include/stdio.h
RevisionDateAuthorComments
 1.104  11-Sep-2021  rillig stdio.h: remove outdated comment for vscanf

When these functions where added to stdio.h 1.72 on 2008-08-04, the
conditional included _NETBSD_SOURCE.

The additional condition was removed in stdio.h 1.99 from 2020-03-20,
but the comment was not updated.
 1.103  11-Sep-2021  rillig stdio.h: sync comment for struct __sFILE with reality

In stdio.h 1.1 from 1993-03-21, the struct had a member named _ub for
the ungetc buffer. That member was repurposed in stdio.h 1.42 from
2001-12-07 in order to support wide characters.

Remove the reference to the 'WARNING above' since there is no such
warning and even when this comment was added in stdio.h 1.20 from
1998-02-02, there was none.
 1.102  11-Sep-2021  rillig stdio.h: remove outdated comment about fpos_t

The 'fairly grotesque' from 1994-04-03 referred to the conditional
definition of the type fpos_t, using two different integer types that
both happened to be 64-bit.

When stdio was changed on 2012-01-22 to keep track of the mbstate, the
conditional type definition was removed and the comment no longer made
sense.
 1.101  11-Sep-2021  rillig stdio.h: fix typo in comment
 1.100  11-Sep-2021  rillig stdio.h: fix typo in comment
 1.99  20-Mar-2020  joerg Fix visibility of various C99 features, esp. for C++11.
 1.98  13-Dec-2019  mrg move P_tmpdir from "/var/tmp/" to "/tmp/".

the main effect of this is to make GCC and other libiberty using
tools use /tmp instead of /var/tmp for compiler temp files,
which can be a bottleneck on larger systems.

a survey of other platforms shows only OSX also uses /var/tmp,
everyone else has switched to /tmp long ago.


cons: some smaller systems may have a smaller /tmp than /var/tmp,
and this may cause builds to fail with out of space earlier.
point the build to /var/tmp using TMPDIR in this case.

one can argue that setting TMPDIR would work around this, but we
want to have the effect for all users without having special setup.
 1.97  17-Mar-2016  christos branches: 1.97.8; 1.97.16; 1.97.18;
gcc 5, my patience is waning.
 1.96  24-Mar-2015  wiz Put fseeko, ftello, pread, and pwrite in the POSIX 2001 namespace.
Ok christos, apb, martin
 1.95  05-Mar-2015  dholland One vscanf_l is ample.
 1.94  04-Mar-2015  christos PR/49715: Henning Petersen: Missing _*_DECLS in stdio.h around popenve.
 1.93  20-Jan-2015  christos add popenve().
 1.92  13-Oct-2014  christos add open_{,w}memstream
 1.91  07-Aug-2014  christos branches: 1.91.2;
cast to LHS type and minor KNF.
 1.90  23-May-2014  joerg Fix use of getline and friends in C++ code.
 1.89  19-May-2014  kleink Move declarations of getdelim() and getline() from the (incorrect) ANSI C
section to POSIX-2008. From Jarmo Jaakkola in PR standards/48788.
 1.88  04-May-2013  christos branches: 1.88.4;
add the signal safe prototypes
 1.87  26-Apr-2013  joerg Don't pollute the name space with the various stdio macros for C++.
 1.86  19-Apr-2013  joerg Add missing __BEGIN_DECLS/__END_DECLS.
 1.85  19-Apr-2013  joerg Add scanf_l and wscanf_l families.
 1.84  19-Apr-2013  joerg Add explicit locale versions for the printf family. Replace asprintf,
snprintf and sprintf with simple wrappers around the corresponding
va_list functions to reduce code duplication.
 1.83  17-Apr-2013  joerg White space
 1.82  18-Apr-2012  christos branches: 1.82.2;
specify size of the array to help -fmudflap
 1.81  27-Mar-2012  christos funopen2()
 1.80  22-Jan-2012  christos branches: 1.80.2;
From tnozaki@: make fpos_t a complex object that keeps track of the parse
state of the stream. Change argument of the seek function to funopen() from
fpos_t to off_t. Make f{g,s}etpos() use the new fpos_t struct, while providing
backwards compatible entry points. Approved by releng@
 1.79  17-Jul-2011  joerg branches: 1.79.2;
Retire varargs.h support. Move machine/stdarg.h logic into MI
sys/stdarg.h and expect compiler to provide proper builtins, defaulting
to the GCC interface. lint still has a special fallback.
Reduce abuse of _BSD_VA_LIST_ by defining __va_list by default and
derive va_list as required by standards.
 1.78  24-Sep-2010  tnozaki add fmemopen(3) derrived from POSIX:2008.
libc minor bump.
 1.77  06-Sep-2010  christos Add dprintf and vdprintf. XXX: Might ifdef it if too many things break.
 1.76  25-Feb-2010  joerg Consistently use __printflike and __scanflike.
 1.75  11-Jan-2010  joerg branches: 1.75.2;
Use a proper char */size_t pair in __sfileext to keep track of the line
buffer for fgetln and fgetwln. Simplifies code by dropping the INT_MAX
related logic. Drop conditionals around FREELB, free(NULL) is valid.
 1.74  13-Jul-2009  roy Add implementations for getdelim(3) and getline(3).
 1.73  21-Sep-2008  christos branches: 1.73.6;
add missing attributes to the remaining calls, even the ones that gcc has
builtin attributes for (for symmetry and consistency). In the future this
might change to use compiler-neutral macros. On the other hand I don't
know of any other compiler that provides other macros with similar
functionality, so why bother?
 1.72  04-Aug-2008  matt Add _POSIX_HOST_NAME_MAX and _POSIX_SYMLOOP_MAX to <limits.h> and add some
references to them in <sys/param.h>
in <stdio.h> also export v*scanf when _ISOC99_SOURCE is defined

From andy dot shevchenko at gmail dot com.
 1.71  13-Mar-2008  christos branches: 1.71.4;
Since _file is a short, check that the fd fits in it, otherwise bail with
EMFILE. We treat _file as an unsigned short to double our range, with a
special case for -1 (closed). Make a note of what we should do about stdio
if we ever bump libc. We could change _file in the future compatibly to an
int by putting it in the extension space but for now we don't bother.
 1.70  02-Aug-2007  kristerw branches: 1.70.2; 1.70.6; 1.70.8;
Do not include SSP files unless _FORTIFY_SOURCE > 0.
 1.69  30-May-2007  tls Match usage of FORTIFY_SOURCE on other platforms by not requiring special
include path: the normal header files now include the "SSP" ones (which one
should note are not really named right: SSP and FORTIFY_SOURCE are independent
features).

Disable USE_SSP on targets where the compiler doesn't support it at all
(mips, alpha) or it's known broken (sh3). But enable FORTIFY_SOURCE,
without SSP, on those platforms -- tested on mipsel.
 1.68  02-Feb-2007  christos remove __SAFE
 1.67  09-Dec-2006  bjh21 defined(_NETBSD_SOURCE) is equivalent to (!defined(_ANSI_SOURCE) &&
!defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE)), so there's no
need to check both of them.
 1.66  22-Nov-2006  christos branches: 1.66.2;
Don't expose _ss functions for 4.0. Requested by core.
 1.65  27-Oct-2006  christos - flags should be unsigned short instead of short.
- add __SAFE flag, to indicate that we want async-signal-safe functionality
only.
- add snprintf_ss, and vsnprintf_ss; these are undocumented on purpose.
 1.64  10-May-2006  mrg add __BEGIN_DECLS/__END_DECLS around snprintf() & vsnprintf() prototypes.
 1.63  27-Dec-2005  perry inline -> __inline for selected things (specifically, the header
file is POSIX visible and the usage isn't #ifdef _KERNEL)

Discussed with core. I may need to go farther than this but for now
compilations done with gcc -ansi (i.e. firefox) will be okay.
 1.62  24-Dec-2005  perry Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.
 1.61  25-May-2005  kleink Include <sys/ansi.h> after <sys/cdefs.h>; from Neil Booth in PR lib/30072.
 1.60  25-May-2005  kleink Belatedly move snprintf() and vnsnprintf() into the XPG4.2/C99 section.
 1.59  25-May-2005  kleink Add restrict qualifiers to fopen()/freopen() arguments.
 1.58  09-Feb-2005  kleink branches: 1.58.2;
A little libc namespace housekeeping exercise:
* Make vfprintf_unlocked() an internal function, c.f. __svfscanf_unlocked().
* Add internal names for arc4random(), endnetpath(), fhstatvfs(),
fstatvfs(), mkstemp(), shquote(), statvfs(), taddr2uaddr(), uaddr2taddr(),
uuid_create_nil(), uuid_is_nil(), and wcwidth().
* Include namespace.h where supposed to.
 1.57  03-Feb-2005  perry de-__P -- the hack is long since useless. Discussed with christos,
matt, kleink, others. Approved by christos.
 1.56  01-Jul-2004  kleink Tidy up the namespace: lint -> __lint__.
 1.55  10-May-2004  drochner remove fgetstr() from public sight
 1.54  21-Apr-2004  christos add fgetstr
 1.53  07-Aug-2003  agc branches: 1.53.2;
Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22270, verified by myself.
 1.52  05-Jun-2003  bjh21 P_tmpdir isn't in POSIX, so only define it for _XOPEN_SOURCE and
_NETBSD_SOURCE.
 1.51  28-Apr-2003  bjh21 Add a new feature-test macro, _NETBSD_SOURCE. If this is defined
by the application, all NetBSD interfaces are made visible, even
if some other feature-test macro (like _POSIX_C_SOURCE) is defined.
<sys/featuretest.h> defined _NETBSD_SOURCE if none of _ANSI_SOURCE,
_POSIX_C_SOURCE and _XOPEN_SOURCE is defined, so as to preserve
existing behaviour.

This has two major advantages:
+ Programs that require non-POSIX facilities but define _POSIX_C_SOURCE
can trivially be overruled by putting -D_NETBSD_SOURCE in their CFLAGS.
+ It makes most of the #ifs simpler, in that they're all now ORs of the
various macros, rather than having checks for (!defined(_ANSI_SOURCE) ||
!defined(_POSIX_C_SOURCE) || !defined(_XOPEN_SOURCE)) all over the place.

I've tried not to change the semantics of the headers in any case where
_NETBSD_SOURCE wasn't defined, but there were some places where the
current semantics were clearly mad, and retaining them was harder than
correcting them. In particular, I've mostly normalised things so that
_ANSI_SOURCE gets you the smallest set of stuff, then _POSIX_C_SOURCE,
_XOPEN_SOURCE and _NETBSD_SOURCE in that order.

Tested by building for vax, encouraged by thorpej, and uncontested in
tech-userlevel for a week.
 1.50  27-Feb-2003  kleink As with _REENTRANT, don't provide simple non-locking macro versions of
several functions when _PTHREADS is defined (usually via cc -pthread).
 1.49  18-Jan-2003  christos avoid TMP_MAX redefinition
 1.48  18-Jan-2003  thorpej Merge the nathanw_sa branch.
 1.47  20-Dec-2002  atatat Spelling police. "__resitrct" was not spelled cirectly enough.
 1.46  30-Nov-2002  lukem - Migrate fparseln(3) from libutil to libc, where it should have been in
the first place...
- Bump libutil major (to 7.0) and libc minor (to 12.91).
 1.45  24-May-2002  thorpej * Move the prototype of __svfscanf from <stdio.h> to libc/stdio/local.h.
* Add prototype for vfscanf to <stdio.h>.
* Remove #define of vfscanf to __svfscanf from <stdio.h>.
* Include local.h in libc files which need __svfscanf.
* Add vfscanf weak alias to __svfscanf.

Fixes standards/16997.

NOTE: libc minor not bumped -- ride on the bump to 12.84 made by
itojun today.
 1.44  24-May-2002  thorpej Parameterize the vfscanf macro's arguments. Without them, 3rd party
software can become greatly confused.

This fixes 4 GCC 3.2 testsuite failures.

This is a stop-gap measure which can be easily applied to the 1.6
release branch. A different fix for the trunk is forthcoming.
 1.43  24-May-2002  thorpej Add a scanf format attribute to __svfscanf().
 1.42  07-Dec-2001  yamt branches: 1.42.2;
- make FILE structure extensible without breaking binary-compatibility.
- add fputwc, fgetwc, fwide and related functions.
- add hooks needed to maintain the orientation of file stream.
 1.41  29-Dec-2000  kleink branches: 1.41.2;
Sprinkle some __restrict into stdio.
 1.40  18-Dec-2000  christos protect against multiple declarations.
 1.39  15-Nov-2000  briggs Move fmtcheck() prototype to stdio.h. It makes more sense to declare it
with the formatting functions with which it is meant to be used. Thanks
to Klaus Klein for "encouraging" me to make this change.
 1.38  28-Jul-2000  kleink Avoid recursion with traditional cpp.
 1.37  23-Jul-2000  mycroft This is a HACK so that libc can compile with -ansi.
 1.36  16-Jul-2000  enami - Fix couple of typos.
- Protect some func. decls. added recently with __{BEGIN,END}_DECLS.
 1.35  15-Jul-2000  drochner fix obvious typo
 1.34  08-Jul-2000  kleink XCU5: Add fseeko() and ftello() functions which provide the functionality of
fseek() and ftell(), respectively, but operate on file offsets of type off_t.
 1.33  26-Jun-2000  kleink Get rid of the inclusion of <sys/types.h> and define fpos_t using __off_t.
 1.32  10-Jan-2000  kleink Move <null.h> to <sys/null.h> for the purpose of avoiding conflicts due to
std C headers including it, and a kernel module written in C++ would benfit
as well.
 1.31  22-Dec-1999  kleink For the benefit of G++'s null pointer constant implementation, #define NULL
as __null with egcs 1.0 (GCC 2.90) and above. As several headers are affected
by this change, move the definition into a new header file, <null.h>, to ease
maintenance.
 1.30  20-Nov-1998  kleink * Bring *_unlocked() declarations in scope if _REENTRANT is defined, too; add
similar protection for the definitions of the macro versions.
* Don't define a macro version of fileno() in a _REENTRANT environment.
 1.29  28-Sep-1998  kleink Move 1003.1c-1995 declarations inside the appropriate name space protection
wrapper, and make sure we won't use these decl's as such with C++ linkage(!).
Also, make _XOPEN_SOURCE protection of popen()/pclose() decl's a bit more
restrictive.
 1.28  28-Aug-1998  tv Use __format__, __printf__ for consistency
 1.27  28-Aug-1998  perry add asprintf and vasprintf, originally written by Todd Miller for OpenBSD
 1.26  30-Jul-1998  mycroft __Namespace__ __protection__.
 1.25  27-Jul-1998  mycroft Nuke tmpnam() as well.
 1.24  27-Jul-1998  mycroft If __AUDIT__ is defined, remove some traditional interfaces: gets, sprintf,
vsprintf, tempnam, mktemp, getwd.
 1.23  11-May-1998  drochner add missing backslash
 1.22  11-May-1998  kleink Reorganize name space protection.
 1.21  14-Feb-1998  kleink If standards-compliance is requested by defining the preprocessor symbols
_POSIX_SOURCE or _XOPEN_SOURCE at compile time, use __RENAME() to call
__posix_rename() instead of rename() in order to remove the requirement of
linking against libposix.
 1.20  02-Feb-1998  perry merge lite-2
 1.19  19-Jan-1998  jtc Added function declarations for flockfile(), ftrylockfile(), funlockfile(),
getc_unlocked(), getchar_unlocked(), putc_unlocked(), & putchar_unlocked().
Added macro definitions for the latter four functions.

Changed so that getc(), putc(), clearerr(), feof() and ferror() macros
are not defined if _REENTRANT is defined so that thread-safe function
versions will be used instead.
 1.18  25-Apr-1996  jtc Fix typo, __STRICT_ANSI_ -> __STRICT_ANSI__
 1.17  20-Jan-1996  jtc Removed declarations for sys_nerr & sys_errlist (moved to errno.h)
 1.16  25-Mar-1995  jtc change second arg of fgets() from size_t to int
 1.15  22-Mar-1995  jtc Removed const qualifier from ftell's FILE * argument. It's not ANSI,
and the recent change to flush output causes it to be changed.
 1.14  26-Oct-1994  cgd new RCS ID format.
 1.13  22-May-1994  cgd _VA_LIST_ -> _BSD_VA_LIST_
 1.12  21-May-1994  cgd add _BSD's to ansi types
 1.11  03-Apr-1994  cgd fpos_t is now a 64-bit quantity
 1.10  04-Jan-1994  cgd rename fgetline() and sharpen axe for bostic...
 1.9  02-Dec-1993  mycroft Add `const's to sys_errlist decl to match 4.4.
 1.8  01-Dec-1993  jtc Use GCC's format attribute (for bug detection with -Wformat).
 1.7  11-Oct-1993  jtc Restore define for L_cuserid and add cuserid prototype.
It was provided, but not documented.
 1.6  06-Oct-1993  jtc cuserid() was removed by 1990's revision of 1003.1, and we never provided it
so don't define the L_cuserid constant.
 1.5  04-Oct-1993  jtc fread and fwrite both return size_t, not int.
 1.4  04-Oct-1993  cgd sscanf takes a const char * as the first arg; the man page was (already)
correct.
 1.3  01-Aug-1993  mycroft Add RCS identifiers.
 1.2  17-Apr-1993  sef `inline' is not present in gcc when -ansi is given; use __inline instead.
 1.1  21-Mar-1993  cgd branches: 1.1.1;
Initial revision
 1.1.1.2  02-Feb-1998  perry import lite-2
 1.1.1.1  21-Mar-1993  cgd initial import of 386bsd-0.1 sources
 1.41.2.7  29-Dec-2002  thorpej Sync with HEAD.
 1.41.2.6  10-Dec-2002  thorpej Sync with HEAD.
 1.41.2.5  21-Jun-2002  nathanw Catch up to -current.
 1.41.2.4  02-May-2002  nathanw Add prototypes for vfprintf_unlocked() and __svfscanf_unlocked().
 1.41.2.3  28-Jan-2002  nathanw Catch up to -current.
 1.41.2.2  14-Jan-2002  nathanw Catch up to -current.
 1.41.2.1  16-Nov-2001  thorpej Enable the flockfile()/funlockfile()/ftrylockfile() prototypes.
 1.42.2.1  24-May-2002  perry resolve 1.6 pullup tickets #12 and #20, submitted by thorpej.
This change pulls up revisions 1.43 and 1.44

Original messages:

> Add a scanf format attribute to __svfscanf().

and

> Parameterize the vfscanf macro's arguments. Without them, 3rd party
> software can become greatly confused.
>
> This fixes 4 GCC 3.2 testsuite failures.
>
> This is a stop-gap measure which can be easily applied to the 1.6
> release branch. A different fix for the trunk is forthcoming.
 1.53.2.1  02-Jul-2004  he branches: 1.53.2.1.2;
Pull up revision 1.56 (requested by kleink in ticket #580):
Tidy up the namespace: lint -> __lint__.
 1.53.2.1.2.2  29-May-2005  riz Pull up revision 1.60 via patch (requested by kleink in ticket #1556):
Belatedly move snprintf() and vnsnprintf() into the XPG4.2/C99 section.
 1.53.2.1.2.1  29-May-2005  riz Pull up revision 1.61 (requested by kleink in ticket #1555):
Include <sys/ansi.h> after <sys/cdefs.h>; from Neil Booth in PR lib/30072.
 1.58.2.3  28-May-2005  tron Pull up revision 1.60 (requested by kleink in ticket #348):
Belatedly move snprintf() and vnsnprintf() into the XPG4.2/C99 section.
 1.58.2.2  28-May-2005  tron Pull up revision 1.61 (requested by kleink in ticket #346):
Include <sys/ansi.h> after <sys/cdefs.h>; from Neil Booth in PR lib/30072.
 1.58.2.1  28-May-2005  tron Pull up revision 1.59 (requested by kleink in ticket #344):
Add restrict qualifiers to fopen()/freopen() arguments.
 1.66.2.3  24-Aug-2007  liamjfoy Pull up following revision(s) (requested by kristerw in ticket #833):
include/unistd.h: revision 1.112
lib/libc/ssp/snprintf_chk.c: revision 1.4
lib/libc/ssp/sprintf_chk.c: revision 1.4
lib/libc/ssp/vsprintf_chk.c: revision 1.4
lib/libc/ssp/gets_chk.c: revision 1.4
include/stdio.h: revision 1.70
lib/libc/ssp/vsnprintf_chk.c: revision 1.4
lib/libc/ssp/fgets_chk.c: revision 1.4
include/strings.h: revision 1.12
include/string.h: revision 1.33
Do not include SSP files unless _FORTIFY_SOURCE > 0.
Update includes so that this builds for USE_FORT=no too.
 1.66.2.2  22-Jul-2007  liamjfoy Pull up to netbsd-4 (requested by christos in ticket #773):

Move libssp to libc.
 1.66.2.1  07-May-2007  pavel branches: 1.66.2.1.2;
Pull up following revision(s) (requested by manu in ticket #607):
lib/libc/arch/i386/gen/isnanl.c: revision 1.6
lib/libc/gdtoa/gdtoa.c: revision 1.2-1.3
lib/libc/arch/x86_64/gen/isnanl.c: revision 1.6
lib/libc/gdtoa/gdtoaimp.h: revision 1.6
sys/arch/m68k/include/ieee.h: revision 1.13
usr.bin/xlint/lint1/scan.l: revision 1.36-1.37
lib/libc/stdio/snprintf_ss.c: revision 1.4
lib/libc/arch/i386/gen/isfinitel.c: revision 1.2
lib/libc/stdio/vfscanf.c: revision 1.38
sys/arch/sparc/include/ieee.h: revision 1.11-1.12
lib/libc/gdtoa/dtoa.c: revision 1.4
lib/libc/stdio/Makefile.inc: revision 1.35
lib/libc/stdio/fvwrite.c: revision 1.17
lib/libc/arch/m68k/gen/fpclassifyl.c: revision 1.2
lib/libc/arch/i386/gen/isinfl.c: revision 1.6
lib/libc/arch/x86_64/gen/isinfl.c: revision 1.6
lib/libc/arch/x86_64/gen/isfinitel.c: revision 1.2
lib/libc/stdio/vfprintf.c: revision 1.55-1.57
lib/libc/stdio/vsnprintf_ss.c: revision 1.3
lib/libc/stdio/vfwprintf.c: revision 1.10
sys/arch/x86/include/ieee.h: revision 1.10
lib/libc/gdtoa/dmisc.c: revision 1.3
lib/libc/gdtoa/Makefile.inc: revision 1.5
sys/arch/hppa/include/ieee.h: revision 1.10
lib/libc/arch/x86_64/gen/fpclassifyl.c: revision 1.3
lib/libc/arch/i386/gen/fpclassifyl.c: revision 1.2
sys/sys/ieee754.h: revision 1.7
lib/libc/gdtoa/gdtoa.h: revision 1.7
include/stdio.h: revision 1.67-1.68
lib/libc/gdtoa/hdtoa.c: revision 1.1-1.4
lib/libc/gdtoa/ldtoa.c: revision 1.1-1.4
defined(_NETBSD_SOURCE) is equivalent to (!defined(_ANSI_SOURCE) &&
!defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE)), so there's no
need to check both of them.
Fix for issue reported in PR lib/35401 as well as related overflow bugs.
deal with hex doubles.
Instead of abusing stdio to get a signal-safe version of sprintf, provide one.
remove __SAFE
add long double and hex double support from freebsd.
make this compile.
add new prototypes.
add the new files to the build. Note I am not bumping libc now, because
these are not used yet.
Merge the int bit with the high fraction bit. Add constants/macros
needed by gdtoa.
add constants used by gdtoa
since the int bit is merged, do the explicit math.
ext_int bit is no more.
ext_int bit is no more.
- merge change from freebsd
- add support for building as vfprintf.c
- XXX: we strdup to simplify the freeing logic. This should be fixed for
efficiency in the vfprintf case.
use vfwprintf.c
enable wide doubles.
some int -> size_t
deal with sparc64 that has 112 bits of mantissa.
make extended precision gdtoa friendly.
int/size_t changes
make this gdtoa friendly.
remove dup definition
use dtoa() instead of returning empty when we don't have extended precision
information.
Fix previous, add forgotten pointer dereference in the call to dtoa().
Add a cheesy workaround marked XXX for the situation where the
strtod() implementation available in the environment does not
handle hex floats.
Discussed with and suggested by christos
From Christos: gdtoa fixes for m68k. M68k ports should build now, but
printing extended precision is a little off.
vax does not have <machine/ieee.h> or long double
It would be nice if the compiler provided something like __IEEE_MATH__
bring in FreeBSD's vfscanf() to gain multi-byte/collation support.
Unfortunately it is too difficult to make vfwscanf and this share
the same code like I did with printf, because for string parsing
the code is too different.
 1.66.2.1.2.1  03-Sep-2007  wrstuden Sync w/ NetBSD-4-RC_1
 1.70.8.2  02-Aug-2007  kristerw Do not include SSP files unless _FORTIFY_SOURCE > 0.
 1.70.8.1  02-Aug-2007  kristerw file stdio.h was added on branch matt-mips64 on 2007-08-02 21:49:10 +0000
 1.70.6.1  24-Mar-2008  keiichi sync with head.
 1.70.2.1  23-Mar-2008  matt sync with HEAD
 1.71.4.1  18-Sep-2008  wrstuden Sync with wrstuden-revivesa-base-2.
 1.73.6.2  21-Sep-2008  christos add missing attributes to the remaining calls, even the ones that gcc has
builtin attributes for (for symmetry and consistency). In the future this
might change to use compiler-neutral macros. On the other hand I don't
know of any other compiler that provides other macros with similar
functionality, so why bother?
 1.73.6.1  21-Sep-2008  christos file stdio.h was added on branch christos-time_t on 2008-09-21 16:59:47 +0000
 1.75.2.2  22-Oct-2010  uebayasi Sync with HEAD (-D20101022).
 1.75.2.1  30-Apr-2010  uebayasi Sync with HEAD.
 1.79.2.3  22-May-2014  yamt sync with head.

for a reference, the tree before this commit was tagged
as yamt-pagecache-tag8.

this commit was splitted into small chunks to avoid
a limitation of cvs. ("Protocol error: too many arguments")
 1.79.2.2  23-May-2012  yamt sync with head.
 1.79.2.1  17-Apr-2012  yamt sync with head
 1.80.2.1  03-Jun-2014  msaitoh Pull up following revision(s) (requested by kleink in ticket #1066):
src/include/stdio.h 1.89-1.90

Move declarations of getdelim() and getline() from the (incorrect) ANSI C
section to POSIX-2008. From Jarmo Jaakkola in PR standards/48788.
 1.82.2.2  20-Aug-2014  tls Rebase to HEAD as of a few days ago.
 1.82.2.1  23-Jun-2013  tls resync from head
 1.88.4.1  10-Aug-2014  tls Rebase.
 1.91.2.1  25-Mar-2015  snj Pull up following revision(s) (requested by wiz in ticket #642):
include/stdio.h: revision 1.96
include/unistd.h: revision 1.145
Put fseeko, ftello, pread, and pwrite in the POSIX 2001 namespace.
Ok christos, apb, martin
 1.97.18.1  30-Mar-2020  martin Pull up following revision(s) (requested by mrg in ticket #811):

include/stdio.h: revision 1.98

move P_tmpdir from "/var/tmp/" to "/tmp/".

the main effect of this is to make GCC and other libiberty using
tools use /tmp instead of /var/tmp for compiler temp files,
which can be a bottleneck on larger systems.

a survey of other platforms shows only OSX also uses /var/tmp,
everyone else has switched to /tmp long ago.

cons: some smaller systems may have a smaller /tmp than /var/tmp,
and this may cause builds to fail with out of space earlier.
point the build to /var/tmp using TMPDIR in this case.

one can argue that setting TMPDIR would work around this, but we
want to have the effect for all users without having special setup.
 1.97.16.1  08-Apr-2020  martin Merge changes from current as of 20200406
 1.97.8.1  29-Mar-2020  martin Pull up following revision(s) (requested by mrg in ticket #1526):

include/stdio.h: revision 1.98

move P_tmpdir from "/var/tmp/" to "/tmp/".

the main effect of this is to make GCC and other libiberty using
tools use /tmp instead of /var/tmp for compiler temp files,
which can be a bottleneck on larger systems.

a survey of other platforms shows only OSX also uses /var/tmp,
everyone else has switched to /tmp long ago.

cons: some smaller systems may have a smaller /tmp than /var/tmp,
and this may cause builds to fail with out of space earlier.
point the build to /var/tmp using TMPDIR in this case.

one can argue that setting TMPDIR would work around this, but we
want to have the effect for all users without having special setup.

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