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

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• Hash : e3e47d17
  Author :
  Date : 2009-06-16T06:14:05
  

  strstr, strcasestr: replace on platforms with broken memchr
  
  * modules/strstr: Split into...
  * modules/strstr-simple: ...new module that does not care about
  performance, but does care about glibc bug.
  * m4/strstr.m4 (gl_FUNC_STRSTR): Split...
  (gl_FUNC_STRSTR_SIMPLE): ...into new macro, which replaces strstr
  if platform memchr is broken, per Debian bug 521737.
  * m4/strcasestr.m4 (gl_FUNC_STRCASESTR_SIMPLE): React to broken
  memchr.
  * m4/memchr.m4 (gl_FUNC_MEMCHR): Only expand once.
  * doc/posix-functions/strstr.texi (strstr): Document the fix.
  * doc/glibc-functions/strcasestr.texi (strcasestr): Likewise.
  * modules/mountlist (Depends-on): Add strstr-simple.
  * modules/gen-uni-tables (Depends-on): Likewise.
  * modules/argz (Depends-on): Add strstr.
  
  Signed-off-by: Eric Blake <ebb9@byu.net>
  

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• doc/posix-functions/strstr.texi

• @node strstr
  @section @code{strstr}
  @findex strstr
  
  POSIX specification: @url{http://www.opengroup.org/onlinepubs/9699919799/functions/strstr.html}
  
  Gnulib module: strstr or strstr-simple
  
  Portability problems fixed by either Gnulib module @code{strstr-simple}
  or @code{strstr}:
  @itemize
  @item
  This function can trigger memchr bugs on some platforms:
  glibc 2.10.
  @end itemize
  
  Portability problems fixed by Gnulib @code{strstr}:
  @itemize
  @item
  This function has quadratic instead of linear worst-case complexity on some
  platforms:
  glibc 2.8, MacOS X 10.3, FreeBSD 6.2, NetBSD 3.0, OpenBSD 4.0, AIX
  5.1, HP-UX 11, IRIX 6.5, OSF/1 5.1, Solaris 10, Cygwin 1.5.x, mingw.
  @end itemize
  
  Portability problems not fixed by Gnulib:
  @itemize
  @item
  This function cannot work correctly on character strings in most multibyte
  locales.  Gnulib provides an alternative function @code{mbsstr} that works
  on character strings in all locales.
  @end itemize
  

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