.. _c23_support:

===========
C23 Support
===========

.. include:: check.rst
.. contents:: Table of Contents
  :depth: 4
  :local:

---------------------
Implementation Status
---------------------

(It's helpful to review 'Annex B (Informative) Library Summary' for these.)


Additions:

* fenv.h

  * fesetexcept |check|
  * fetestexceptflag |check|
  * fegetmode
  * fesetmode
* math.h

  * acospi*
  * asinpi*
  * atanpi*
  * atan2pi*
  * cospi*
  * sinpi*
  * tanpi*
  * exp10*
  * exp10m1*
  * exp2m1*
  * log10p1*
  * logp1
  * log2p1*
  * rsqrt*
  * __STDC_IEC_60559_DFP__ functions (_Decimal32, _Decimal64, _Decimal128)
  * compoundn*
  * totalorder*
  * totalordermag*
  * getpayload*
  * setpayload*
  * iscannonical
  * issignaling
  * issubnormal
  * iszero
  * llogb*
  * pown*
  * powr*
  * rootn*
  * roundeven* |check|
  * fromfp*
  * ufromfp*
  * fromfpx*
  * nextup*
  * nextdown*
  * canonicalize*
  * fmaximum*
  * fminimum*
  * fmaximum_mag*
  * fminimum_mag*
  * fmaximum_mag_num*
  * fminimum_mag_num*
  * fadd*
  * fsub*
  * fmul*
  * fdiv*
  * ffma*
  * dfmal
  * fsqrt*
  * dsqrtl
* stdbit.h (New header)    |check|
* stdckdint.h (New header) |check|
* stddef.h

  * unreachable
* stdlib.h

  * strfromd
  * strfromf
  * strfroml
  * free_sized
  * free_aligned_sized
  * memalignment
* string.h

  * memset_explicit |check|
  * memccpy
  * strdup
  * strndup
* tgmath.h

  * acospi
  * asinpi
  * atan2pi
  * atanpi
  * compoundn
  * cospi
  * erf
  * exp10m1
  * exp10
  * exp2m1
  * fmaximum
  * fmaximum_mag
  * fmaximum_num
  * fmaximum_mag_num
  * fminimum
  * fminimum_mag
  * fminimum_num
  * fminimum_mag_num
  * fromfpx
  * fromfp
  * llogb
  * log10p1
  * log2p1
  * logp1
  * nextdown
  * nextup
  * pown
  * powr
  * rootn
  * roundeven
  * rsqrt
  * scalbn
  * sinpi
  * tanpi
  * ufromfpx
  * ufromfp
  * fadd
  * dadd
  * fsub
  * dsub
  * fmul
  * dmul
  * fdiv
  * ddiv
  * ffma
  * dfma
  * fsqrt
  * dsqrt
* time.h

  * gmtime_r
  * localtime_r
  * timegm
  * timespec_getres
  * strftime conversion specifiers

    * 0b
    * 0B
* uchar.h

  * mbrtoc8
  * c8rtomb
  * char*_t |check|