glibc/sysdeps/mach
Joseph Myers dee2bea048 C2x scanf binary constant handling
C2x adds binary integer constants starting with 0b or 0B, and supports
those constants for the %i scanf format (in addition to the %b format,
which isn't yet implemented for scanf in glibc).  Implement that scanf
support for glibc.

As with the strtol support, this is incompatible with previous C
standard versions, in that such an input string starting with 0b or 0B
was previously required to be parsed as 0 (with the rest of the input
potentially matching subsequent parts of the scanf format string).
Thus this patch adds 12 new __isoc23_* functions per long double
format (12, 24 or 36 depending on how many long double formats the
glibc configuration supports), with appropriate header redirection
support (generally very closely following that for the __isoc99_*
scanf functions - note that __GLIBC_USE (DEPRECATED_SCANF) takes
precedence over __GLIBC_USE (C2X_STRTOL), so the case of GNU
extensions to C89 continues to get old-style GNU %a and does not get
this new feature).  The function names would remain as __isoc23_* even
if C2x ends up published in 2024 rather than 2023.

When scanf %b support is added, I think it will be appropriate for all
versions of scanf to follow C2x rules for inputs to the %b format
(given that there are no compatibility concerns for a new format).

Tested for x86_64 (full glibc testsuite).  The first version was also
tested for powerpc (32-bit) and powerpc64le (stdio-common/ and wcsmbs/
tests), and with build-many-glibcs.py.
2023-03-02 19:10:37 +00:00
..
htl Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
hurd C2x scanf binary constant handling 2023-03-02 19:10:37 +00:00
i386 Define PC, SP and SYSRETURN for hurd x86_64 2023-02-20 01:33:15 +01:00
include hurd: break relocation loop between libc.so and lib{mach,hurd}user.so 2020-11-14 00:52:52 +01:00
sys Installed-header hygiene (BZ#20366): obsolete BSD u_* types. 2016-09-23 08:43:56 -04:00
x86 Define PC, SP and SYSRETURN for hurd x86_64 2023-02-20 01:33:15 +01:00
x86_64 hurd: Set up the basic tree for x86_64-gnu 2023-02-12 16:12:06 +01:00
_strerror.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
adjtime.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
clock_gettime.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
clock_nanosleep.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
configure mach: Look for mach_i386.defs on x86_64 too 2023-02-12 16:04:50 +01:00
configure.ac mach: Look for mach_i386.defs on x86_64 too 2023-02-12 16:04:50 +01:00
getloadavg.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
getpagesize.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
getsysstats.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
libc-lock.h Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
libmachuser.abilist hurd: add base abilist files 2018-01-28 17:26:35 +01:00
Makefile Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
mprotect.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
msync.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
munmap.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
pagecopy.h Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
readonly-area.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
sched_yield.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
sleep.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
strerror_l.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
Subdirs * Makefile (subdir-target-args): New variable. 2006-02-28 07:11:04 +00:00
sysdep.h mach: undef ENTRY2 2023-02-14 20:29:55 +01:00
thread_state.h Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
usleep.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
xpg-strerror.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00