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

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  Date : 2024-10-27T17:01:29
  

  doc: Add a module index.
  
  * doc/Makefile (undocumented-modules.texi): New rule.
  (%.info, %.html, %.dvi, %.pdf): Depend on undocumented-modules.texi.
  (mostlyclean): Remove also *.m and *.tmp.
  (force): New rule.
  * doc/*.texi: Add module index entries.
  * doc/*/*.texi: Likewise.
  

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• doc/posix-functions/memmem.texi

• @node memmem
  @subsection @code{memmem}
  @findex memmem
  
  POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9799919799/functions/memmem.html}
  
  Documentation:
  @itemize
  @item
  @ifinfo
  @ref{Search Functions,,Search Functions,libc},
  @end ifinfo
  @ifnotinfo
  @url{https://www.gnu.org/software/libc/manual/html_node/Search-Functions.html},
  @end ifnotinfo
  @item
  @uref{https://www.kernel.org/doc/man-pages/online/pages/man3/memmem.3.html,,man memmem}.
  @end itemize
  
  Gnulib module: memmem or memmem-simple
  @mindex memmem
  @mindex memmem-simple
  
  Both modules implement the same replacement for the @code{memmem} function
  with the @code{memmem} module providing a replacement on more platforms where
  the existing @code{memmem} function has a quadratic worst-case complexity.
  
  Portability problems fixed by either Gnulib module @code{memmem-simple}
  or @code{memmem}:
  @itemize
  @item
  This function is missing on some platforms:
  Mac OS X 10.5, FreeBSD 5.2.1, OpenBSD 4.0, Minix 3.1.8, HP-UX 11, Solaris 10, mingw, MSVC 14.
  @item
  This function has reversed arguments on some older platforms:
  Linux libc 5.0.9
  @item
  This function can trigger false positives for long periodic needles on
  some platforms:
  glibc 2.12, Cygwin 1.7.7.
  
  @item
  This function returns incorrect values in some cases, such as when
  given an empty needle:
  glibc <= 2.0, macOS 14, AIX 7.2, Solaris 11.3, Cygwin 1.5.x.
  @end itemize
  
  Performance problems fixed by Gnulib module @code{memmem}:
  @itemize
  @item
  This function has quadratic instead of linear worst-case complexity on some
  platforms:
  glibc 2.8, macOS 14, FreeBSD 11.4, NetBSD 8.2, OpenBSD 6.6, AIX 7.2, Solaris 11.4, Cygwin 1.5.x.
  Note for small needles the replacement may be slower.
  @end itemize
  
  Portability problems not fixed by Gnulib:
  @itemize
  @end itemize
  

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