kc3-lang/gnulib/doc/posix-functions/vsprintf.texi

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  Date : 2023-03-24T22:14:09
  

  *printf-posix: ISO C 23: Support size specifiers 'wN' and 'wfN'.
  
  * lib/printf-args.h: Include <stdint.h>.
  (arg_type): Add TYPE_[U]INT8_T, ..., TYPE_[U]INT_FAST64_T and
  TYPE_COUNT_INT8_T_POINTER, ..., TYPE_COUNT_INT_FAST64_T_POINTER.
  (argument): Add the union members a_[u]int8_t, ..., a_[u]int_fast64_t
  and a_count_int8_t_pointer, ..., a_count_int_fast64_t_pointer.
  * lib/printf-args.c: Include <limits.h>.
  (PRINTF_FETCHARGS): Handle TYPE_[U]INT8_T, ..., TYPE_[U]INT_FAST64_T and
  TYPE_COUNT_INT8_T_POINTER, ..., TYPE_COUNT_INT_FAST64_T_POINTER.
  * lib/printf-parse.c (PRINTF_PARSE): Accept only one size specifier, not
  a sequence of size specifiers. Accept "wN" and "wfN", where N = 8, 16,
  32, 64.
  * lib/vasnprintf.c (MAX_ROOM_NEEDED, VASNPRINTF): Handle the new TYPE_*
  values as well.
  * m4/printf.m4 (gl_PRINTF_SIZES_C23): New macro.
  * m4/vasnprintf-posix.m4 (gl_FUNC_VASNPRINTF_IS_POSIX): Require
  gl_PRINTF_SIZES_C23. Test gl_cv_func_printf_sizes_c23.
  * m4/dprintf-posix.m4 (gl_FUNC_DPRINTF_IS_POSIX): Likewise.
  * m4/fprintf-posix.m4 (gl_FUNC_FPRINTF_IS_POSIX): Likewise.
  * m4/obstack-printf-posix.m4 (gl_FUNC_OBSTACK_PRINTF_IS_POSIX):
  Likewise.
  * m4/snprintf-posix.m4 (gl_FUNC_SNPRINTF_IS_POSIX): Likewise.
  * m4/sprintf-posix.m4 (gl_FUNC_SPRINTF_IS_POSIX): Likewise.
  * m4/vasprintf-posix.m4 (gl_FUNC_VASPRINTF_IS_POSIX): Likewise.
  * m4/vdprintf-posix.m4 (gl_FUNC_VDPRINTF_IS_POSIX): Likewise.
  * m4/vfprintf-posix.m4 (gl_FUNC_VFPRINTF_IS_POSIX): Likewise.
  * m4/vsnprintf-posix.m4 (gl_FUNC_VSNPRINTF_IS_POSIX): Likewise.
  * m4/vsprintf-posix.m4 (gl_FUNC_VSPRINTF_IS_POSIX): Likewise.
  * tests/test-vasnprintf-posix.c (test_function): Add tests for size
  specifiers with %d, %u, %b, %o, %x.
  * tests/test-snprintf-posix.h (test_function): Likewise.
  * tests/test-sprintf-posix.h (test_function): Likewise.
  * tests/test-vasnwprintf-posix.c (test_function): Likewise.
  * tests/test-vasprintf-posix.c (test_function): Likewise.
  * modules/vasnprintf (Depends-on): Add limits-h.
  * modules/vasnwprintf (Depends-on): Add limits-h.
  * modules/c-vasnprintf (Depends-on): Add limits-h, stdint.
  * modules/unistdio/u-printf-args (Depends-on): Add stdint, limits-h.
  * doc/posix-functions/dprintf.texi: Mention the ISO C 23 size
  specifiers.
  * doc/posix-functions/fprintf.texi: Likewise.
  * doc/posix-functions/fwprintf.texi: Likewise.
  * doc/posix-functions/printf.texi: Likewise.
  * doc/posix-functions/snprintf.texi: Likewise.
  * doc/posix-functions/sprintf.texi: Likewise.
  * doc/posix-functions/swprintf.texi: Likewise.
  * doc/posix-functions/vdprintf.texi: Likewise.
  * doc/posix-functions/vfprintf.texi: Likewise.
  * doc/posix-functions/vfwprintf.texi: Likewise.
  * doc/posix-functions/vprintf.texi: Likewise.
  * doc/posix-functions/vsnprintf.texi: Likewise.
  * doc/posix-functions/vsprintf.texi: Likewise.
  * doc/posix-functions/vswprintf.texi: Likewise.
  * doc/posix-functions/vwprintf.texi: Likewise.
  * doc/posix-functions/wprintf.texi: Likewise.
  

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• doc/posix-functions/vsprintf.texi

• @node vsprintf
  @section @code{vsprintf}
  @findex vsprintf
  
  POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/vsprintf.html}
  
  Gnulib module: vsprintf-posix or vsprintf-gnu
  
  Portability problems fixed by either Gnulib module @code{vsprintf-posix} or @code{vsprintf-gnu}:
  @itemize
  @item
  This function does not support size specifiers as in C99 (@code{hh}, @code{ll},
  @code{j}, @code{t}, @code{z}) on some platforms:
  AIX 5.1, HP-UX 11.23, IRIX 6.5, Solaris 9, Cygwin 1.5.24, mingw, MSVC 14.
  @item
  This function does not support size specifiers as in C23 (@code{w8},
  @code{w16}, @code{w32}, @code{w64}, @code{wf8}, @code{wf16}, @code{wf32},
  @code{wf64}) on some platforms:
  glibc, musl libc, macOS 12.5, FreeBSD 13.1, NetBSD 9.0, OpenBSD 7.2,
  AIX 7.2, HP-UX 11, IRIX 6.5, Solaris 11.4, Cygwin 2.9.0, mingw, MSVC 14.
  @item
  printf of @samp{long double} numbers is unsupported on some platforms:
  mingw, MSVC 14.
  @item
  printf @code{"%f"}, @code{"%e"}, @code{"%g"} of Infinity and NaN yields an
  incorrect result on some platforms:
  AIX 5.2, Solaris 11.4, mingw, MSVC 14.
  @item
  This function does not support the @samp{a} and @samp{A} directives on some
  platforms:
  glibc-2.3.6, Mac OS X 10.5, NetBSD 9.0, OpenBSD 4.0, AIX 5.2, HP-UX 11,
  IRIX 6.5, Solaris 11.4, Cygwin 1.5.x, mingw, MSVC 14.
  @item
  This function does not support the @samp{b} directive, required by ISO C23,
  on some platforms:
  glibc 2.34, musl libc, macOS 12.5, FreeBSD 13.1, NetBSD 9.0, OpenBSD 7.2,
  AIX 7.2, HP-UX 11, IRIX 6.5, Solaris 11.4, Cygwin 2.9.0, mingw, MSVC 14.
  @item
  This function does not support the @samp{F} directive on some platforms:
  NetBSD 3.0, AIX 5.1, HP-UX 11.23, IRIX 6.5, Solaris 9,
  Cygwin 1.5.x, mingw, MSVC 14.
  @item
  This function does not support the @samp{n} directive on some platforms:
  glibc when used with @code{_FORTIFY_SOURCE >= 2} (set by default on Ubuntu),
  macOS 11.1, MSVC 14.
  @item
  This function does not support the @samp{ls} directive on some platforms:
  OpenBSD 4.0, IRIX 6.5, Cygwin 1.5.x, Haiku.
  @item
  This function does not support precisions in the @samp{ls} directive correctly
  on some platforms:
  Solaris 11.4.
  @item
  This function does not support format directives that access arguments in an
  arbitrary order, such as @code{"%2$s"}, on some platforms:
  NetBSD 3.0, mingw, MSVC 14.
  @item
  This function doesn't support the @code{'} flag on some platforms:
  NetBSD 3.0, Cygwin 1.5.24, mingw, MSVC 14.
  @item
  This function does not round the argument of the @samp{a} directive correctly
  on some platforms:
  Mac OS X 10.12, FreeBSD 13.0.
  @item
  printf @code{"%010f"} of NaN and Infinity yields an incorrect result (padded
  with zeroes, or wrong capitalization) on some platforms:
  Mac OS X 10.5, FreeBSD 6.0, NetBSD 5.0, AIX 5.2, IRIX 6.5, Solaris 11.4, Cygwin 1.5.x, mingw, MSVC/clang.
  @item
  This function does not support precisions larger than 512 or 1024 in integer,
  floating-point and pointer output on some platforms:
  AIX 7.1, Solaris 10/x86, mingw, MSVC/clang.
  @item
  This function mishandles large floating point precisions
  (for example, formatting 1.0 with @samp{"%.511f"})
  on some platforms:
  Solaris 10.
  @item
  This function produces wrong output for the @samp{lc} directive with a NUL
  wide character argument on some platforms:
  glibc 2.35, FreeBSD 13.1, NetBSD 9.0, OpenBSD 7.2, macOS 12.5, AIX 7.2, Solaris 11.4, and others.
  @item
  This function can crash in out-of-memory conditions on some platforms:
  FreeBSD 13.0, NetBSD 5.0.
  @item
  The compiler warns that this function is deprecated:
  macOS 13.0.
  @end itemize
  
  Portability problems fixed by Gnulib module @code{vsprintf-gnu}:
  @itemize
  @item
  This function does not support the @samp{B} directive on some platforms:
  glibc 2.34, FreeBSD 13.1, NetBSD 9.0, OpenBSD 7.2, macOS 12.5, AIX 7.2, Solaris 11.4, and others.
  @end itemize
  
  Portability problems not fixed by Gnulib:
  @itemize
  @item
  The @code{%m} directive is not portable, use @code{%s} mapped to an
  argument of @code{strerror(errno)} (or a version of @code{strerror_r})
  instead.
  @item
  Formatting noncanonical @samp{long double} numbers produces
  nonmeaningful results on some platforms:
  glibc and others, on x86, x86_64, IA-64 CPUs.
  @item
  When formatting an integer with grouping flag, this function inserts thousands
  separators even in the "C" locale on some platforms:
  NetBSD 5.1.
  @end itemize
  

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