rename isnan to isnand

[Bruno Haible]

Hi,

In order to make use of the GCC built-in __builin_isnan, I get into trouble
regarding the isnan() function/macro in gnulib. If I define
  #define isnan(x) __builtin_isnan((double)(x))
I get into trouble with 'float' and 'long double' arguments to this function,
which are valid according to POSIX. So I would have to define
  #define isnan(x) \
    (sizeof (x) == sizeof (long double) ? ... : \
     sizeof (x) == sizeof (double) ? ... : \
     ...)
But then the isnan-nolibm macro needs to needlessly depend on the isnanf-nolibm
and isnanl-nolibm modules.

Also, isnan() simply is not meant to be defined as rpl_isnan, that is, as a
function that takes a 'double'.

The first step in cleaning this up is to rename the specialized function
to 'isnand', so it can be distinguished from the type-generic 'isnan'.
(Similar thing as for the signbit() macro.) I committed this.

NEWS:

2008-01-26  isnan-nolibm    The module name is changed from isnan-nolibm to
                            isnand-nolibm. The include file is changed from
                            "isnan.h" to "isnand.h". The function that it
                            defines is changed from isnan() to isnand().

2008-01-26  Bruno Haible  <address@hidden>

        Rename isnan, applicable to 'double' only, to isnand.
        * modules/isnand-nolibm: Renamed from modules/isnan-nolibm.
        (Files): Add lib/isnand.h, lib/isnand.c. Remove lib/isnan.h.
        (configure.ac): Update.
        (Include): Replace "isnan.h" with "isnand.h".
        * m4/isnand.m4: Renamed from m4/isnan.m4.
        (gl_FUNC_ISNAND_NO_LIBM): Renamed from gl_FUNC_ISNAN_NO_LIBM. Set
        HAVE_ISNAND_IN_LIBC instead of HAVE_ISNAN_IN_LIBC. Build isnand.c
        instead of isnan.c.
        * lib/isnand.h: Renamed from lib/isnan.h. Test HAVE_ISNAND_IN_LIBC
        instead of HAVE_ISNAN_IN_LIBC.
        (isnand): Renamed from isnan.
        * lib/isnand.c: New file.
        * modules/isnand-nolibm-tests: Renamed from modules/isnan-nolibm-tests.
        (Files): Add tests/test-isnand.c. Remove tests/test-isnan.c.
        (Makefile.am): Update.
        * tests/test-isnand.c: Renamed from tests/test-isnan.c.
        Include isnand.h instead of isnan.h.
        (main): Test isnand instead of isnan.
        * modules/fprintf-posix (Depends-on): Add isnand-nolibm, remove
        isnan-nolibm.
        * modules/frexp (Depends-on): Likewise.
        * modules/frexp-tests (Depends-on): Likewise.
        * modules/frexp-nolibm (Depends-on): Likewise.
        * modules/frexp-nolibm-tests (Depends-on): Likewise.
        * modules/isfinite (Depends-on): Likewise.
        * modules/round-tests (Depends-on): Likewise.
        * modules/signbit (Depends-on): Likewise.
        * modules/signbit-tests (Depends-on): Likewise.
        * modules/snprintf-posix (Depends-on): Likewise.
        * modules/sprintf-posix (Depends-on): Likewise.
        * modules/trunc-tests (Depends-on): Likewise.
        * modules/unistdio/u8-vasnprintf (Depends-on): Likewise.
        * modules/unistdio/u8-u8-vasnprintf (Depends-on): Likewise.
        * modules/unistdio/u16-vasnprintf (Depends-on): Likewise.
        * modules/unistdio/u16-u16-vasnprintf (Depends-on): Likewise.
        * modules/unistdio/u32-vasnprintf (Depends-on): Likewise.
        * modules/unistdio/u32-u32-vasnprintf (Depends-on): Likewise.
        * modules/unistdio/ulc-vasnprintf (Depends-on): Likewise.
        * modules/vasnprintf-posix (Depends-on): Likewise.
        * modules/vasprintf-posix (Depends-on): Likewise.
        * modules/vfprintf-posix (Depends-on): Likewise.
        * modules/vsnprintf-posix (Depends-on): Likewise.
        * modules/vsprintf-posix (Depends-on): Likewise.
        * lib/frexp.c: Include isnand.h instead of isnan.h.
        (ISNAN): Set to isnand instead of isnan.
        * lib/isfinite.c: Include isnand.h instead of isnan.h.
        (gl_isfinited): Use isnand instead of isnan.
        * lib/signbitd.c: Include isnand.h instead of isnan.h.
        (gl_signbitd): Use isnand instead of isnan.
        * lib/vasnprintf.c: Include isnand.h instead of isnan.h.
        (is_infinite_or_zero, VASNPRINTF): Use isnand instead of isnan.
        * tests/test-frexp.c: Include isnand.h instead of isnan.h.
        (main): Use isnand instead of isnan.
        * tests/test-round1.c: Include isnand.h.
        (main): Use isnand instead of isnan.
        * tests/test-round2.c: Include isnand.h instead of isnan.h.
        (ISNAN): Set to isnand instead of isnan.
        * tests/test-trunc1.c: Include isnand.h.
        (main): Use isnand instead of isnan.
        * tests/test-trunc2.c: Include isnand.h instead of isnan.h.
        (equal): Use isnand instead of isnan.
        * MODULES.html.sh (Mathematics <math.h>): Replace isnan-nolibm with
        isnand-nolibm.
        * NEWS: Mention the change.

http://git.savannah.gnu.org/gitweb/?p=gnulib.git;a=commitdiff;h=b17d7ac7df62c7c7f56fe857ed28151d8b0e4e28