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

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  Date : 2020-07-25T17:11:15
  

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• doc/posix-functions/strtod.texi

• @node strtod
  @section @code{strtod}
  @findex strtod
  
  POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/strtod.html}
  
  Gnulib module: strtod or strtod-obsolete
  
  Portability problems fixed by either Gnulib module @code{strtod} or @code{strtod-obsolete}:
  @itemize
  @item
  This function mis-parses strings with leading @samp{+} on some old platforms:
  Old versions of Linux.
  
  @item
  This function returns a wrong end pointer on some old platforms.
  
  @item
  This function consumes whitespace even when there is nothing that should
  be parsed on some platforms:
  IRIX 6.5.
  
  @item
  This function allows whitespace between @samp{e} and the exponent on
  some platforms:
  HP-UX 11.11, IRIX 6.5.
  
  @item
  This function returns the wrong end pointer for @samp{-0x} on some
  platforms:
  glibc 2.4, Mac OS X 10.5, FreeBSD 6.2, AIX 7.1, Cygwin < 1.5.25-11.
  
  @item
  This function returns +0.0 (not @minus{}0.0) for @samp{-0} on some platforms:
  IRIX 6.5.
  
  @item
  This function fails to parse Infinities and plain NaNs on some platforms:
  OpenBSD 4.0, HP-UX 11.11, IRIX 6.5, Solaris 9, mingw, MSVC 14.
  
  @item
  This function fails to parse @samp{NaN()} on some platforms:
  glibc-2.3.6, Mac OS X 10.5, FreeBSD 6.2, OpenBSD 4.0, AIX 7.1, HP-UX 11.11, IRIX 6.5, Cygwin < 1.5.25-11, mingw, MSVC 14.
  
  @item
  This function fails to parse @samp{NaN(@var{n-char-sequence})} on some
  platforms:
  OpenBSD 4.0, HP-UX 11.11, IRIX 6.5, mingw, MSVC 14.
  
  @item
  This function parses @samp{NaN(@var{n-char-sequence})}, but returns
  the wrong end pointer on some platforms:
  glibc-2.4, AIX 7.1.
  
  @item
  This function fails to parse C99 hexadecimal floating point on some
  platforms:
  NetBSD 5.0, OpenBSD 4.0, AIX 5.1, HP-UX 11.11, IRIX 6.5, Solaris 11.4, mingw, MSVC 14.
  
  @item
  In hexadecimal floats, this function allows whitespace between @samp{p}
  and the exponent on some platforms:
  HP-UX 11.31/ia64.
  
  @item
  This function returns the wrong end pointer for @samp{0x1p} on some
  platforms:
  AIX 7.1.
  @end itemize
  
  Portability problems fixed by Gnulib module @code{strtod-obsolete}:
  @itemize
  @item
  This function is missing on some old platforms.
  @end itemize
  
  Portability problems not fixed by Gnulib:
  @itemize
  @item
  This function returns +0.0 (not @minus{}0.0) for negative underflow on some
  platforms:
  glibc 2.7, Cygwin 1.5.x, mingw, MSVC 14.
  
  @item
  This function cannot distinguish between ``nan'' and ``-nan'' on some
  platforms:
  glibc 2.7, IRIX 6.5, mingw, MSVC 14.
  
  @item
  This function fails to correctly parse very long strings on some
  platforms:
  Mac OS X 10.5, FreeBSD 6.2, NetBSD 5.0, OpenBSD 4.0, IRIX 6.5, Cygwin, mingw, MSVC 14.
  
  @item
  The replacement function does not always return correctly rounded results.
  @end itemize
  

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