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:
Variable-sized buffer with on-stack default allocation.

Files:
lib/scratch_buffer.h
lib/malloc/scratch_buffer.h
lib/malloc/scratch_buffer_grow.c
lib/malloc/scratch_buffer_grow_preserve.c
lib/malloc/scratch_buffer_set_array_size.c

Depends-on:
libc-config
stdbool
stddef

configure.ac:

Makefile.am:
lib_SOURCES += malloc/scratch_buffer_grow.c \
               malloc/scratch_buffer_grow_preserve.c \
               malloc/scratch_buffer_set_array_size.c

Include:
<scratch_buffer.h>

License:
LGPLv2+

Maintainer:
all, glibc