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

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• Hash : ccb59e4c
  Author :
  Date : 2023-04-19T17:59:03
  

  wcsncmp: Work around two ISO C compliance bugs on several platforms.
  
  * lib/wchar.in.h (wcsncmp): Consider REPLACE_WCSNCMP.
  * lib/wcsncmp-impl.h (wcsncmp): Don't assume that the two wide
  characters are in the range 0..INT_MAX.
  * m4/wcsncmp.m4 (gl_FUNC_WCSNCMP): Test whether wcsncmp works for all
  wide characters. Set REPLACE_WCSNCMP.
  * m4/wchar_h.m4 (gl_WCHAR_H_DEFAULTS): Initialize REPLACE_WCSNCMP.
  * modules/wchar (Makefile.am): Substitute REPLACE_WCSNCMP.
  * modules/wcsncmp (Status, Notice): Un-obsolete this module.
  (configure.ac): Consider REPLACE_WCSNCMP.
  * doc/posix-functions/wcsncmp.texi: Mention the two bugs.
  

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• doc/posix-functions/wcsncmp.texi

• @node wcsncmp
  @section @code{wcsncmp}
  @findex wcsncmp
  
  POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/wcsncmp.html}
  
  Gnulib module: wcsncmp
  
  Portability problems fixed by Gnulib:
  @itemize
  @item
  This function compares the wide characters as if they were unsigned, although
  @code{wchar_t} is signed, on some platforms:
  glibc 2.14.1 on x86 or x86_64, musl libc 1.2.3, macOS 12.5, FreeBSD 13.2, NetBSD 9.0, OpenBSD 7.2, Solaris 11.4.
  @item
  This function may return a wrong result if the two arguments are of different
  length, on some platforms:
  AIX 7.2 in 64-bit mode.
  @end itemize
  
  Portability problems not fixed by Gnulib:
  @itemize
  @item
  On Windows and 32-bit AIX platforms, @code{wchar_t} is a 16-bit type and therefore cannot
  accommodate all Unicode characters.
  @end itemize
  

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