Fix undefined behaviour. * lib/bitrotate.h (rotl16, rotr16, rotl8, rotr8): Case x to 'unsigned int', to avoid shift operations on 'int'. * lib/xmemdup0.c (xmemdup0): Don't invoke memcpy with a zero size. * tests/test-count-leading-zeros.c (main): Use a random number that has as many bits as TYPE, not only 2*15 or 2*31 bits. * tests/test-count-trailing-zeros.c (main): Likewise. * tests/test-count-one-bits.c (main): Likewise. * tests/test-memmem.c: Don't include "null-ptr.h". (main): Use zerosize_ptr() instead of null_ptr(). * modules/memmem-tests (Files): Remove tests/null-ptr.h.

Description:
ilogb() function: get exponent as integer.

Files:
lib/ilogb.c
m4/ilogb.m4
m4/mathfunc.m4

Depends-on:
math
isfinite        [test $HAVE_ILOGB = 0 || test $REPLACE_ILOGB = 1]
frexp           [test $HAVE_ILOGB = 0 || test $REPLACE_ILOGB = 1]
isnand          [test $HAVE_ILOGB = 0 || test $REPLACE_ILOGB = 1]

configure.ac:
gl_FUNC_ILOGB
if test $HAVE_ILOGB = 0 || test $REPLACE_ILOGB = 1; then
  AC_LIBOBJ([ilogb])
fi
gl_MATH_MODULE_INDICATOR([ilogb])

Makefile.am:

Include:
<math.h>

Link:
$(ILOGB_LIBM)

License:
LGPL

Maintainer:
all