.TH LIBSIMPLE_VREALLOCFN 3 libsimple
.SH NAME
libsimple_vreallocfn \- reallocate memory

.SH SYNOPSIS
.nf
#include <libsimple.h>

static inline void *libsimple_vreallocfn(void *\fIptr\fP, size_t \fIn\fP, va_list \fIap\fP);
static inline void *libsimple_reallocfn(void *\fIptr\fP, size_t \fIn\fP, ..., /* (size_t)0 */);

#ifndef vreallocfn
# define vreallocfn libsimple_vreallocfn
#endif
#ifndef reallocfn
# define reallocfn libsimple_reallocfn
#endif
.fi
.PP
Link with
.IR \-lsimple .

.SH DESCRIPTION
The
.BR libsimple_reallocfn ()
function is a wrapper for the
.BR realloc (3)
function, it reallocate memory allocated on
the heap and return the older pointer or a new
pointer with the alignment of
.I alignof(max_align_t)
to the allocated memory of 
.I N
bytes, where
.I N
is the product of
.I n
and all following arguments (which should have the type
.BR size_t )
up to the first 0;
.I n
must not be 0. The returned pointer will contain the
same content as
.IR ptr ,
but truncated to
.I N
bytes if it is smaller or with the new bytes
unitialised if it is larger. If a new pointer
is returned, rather than
.IR ptr ,
.I ptr
is deallocated;
.I ptr
is also deallocated on failure. The function
.BR free (3)
shall be called with the returned pointer as
input when the allocated memory is no longer needed.
.PP
The
.BR libsimple_vreallocfn ()
function is a version of the
.BR libsimple_reallocfn ()
function that use
.B va_list
instead of variadic arguments.

.SH RETURN VALUE
The
.BR libsimple_vreallocfn ()
and
.BR libsimple_reallocfn (),
functions return a pointer to the allocated memory
upon success completion; otherwise the
.BR libsimple_vreallocfn ()
and
.BR libsimple_reallocfn ()
functions return
.B NULL
and set
.I errno
it indicate the error.

.SH ERRORS
The
.BR libsimple_vreallocn (),
.BR libsimple_reallocn ()
function will fail for the reasons specified for the
.BR realloc (3)
function, and if:
.TP
.B EINVAL
.I n
is 0.

.SH ATTRIBUTES
For an explanation of the terms used in this section, see
.BR attributes (7).
.TS
allbox;
lb lb lb
l l l.
Interface	Attribute	Value
T{
.BR libsimple_vreallocfn (),
.br
.BR libsimple_reallocfn ()
T}	Thread safety	MT-Safe
T{
.BR libsimple_vreallocfn (),
.br
.BR libsimple_reallocfn ()
T}	Async-signal safety	AS-Safe
T{
.BR libsimple_vreallocfn (),
.br
.BR libsimple_reallocfn ()
T}	Async-cancel safety	AC-Safe
.TE

.SH EXAMPLES
None.

.SH APPLICATION USAGE
None.

.SH RATIONALE
None.

.SH FUTURE DIRECTIONS
None.

.SH NOTES
None.

.SH BUGS
None.

.SH SEE ALSO
.BR libsimple_enmalloc (3),
.BR libsimple_mallocz (3),
.BR libsimple_vmallocn (3),
.BR libsimple_vmalloczn (3),
.BR libsimple_encalloc (3),
.BR libsimple_vcallocn (3),
.BR libsimple_enrealloc (3),
.BR libsimple_reallocarray (3),
.BR libsimple_vreallocn (3),
.BR libsimple_reallocf (3),
.BR libsimple_reallocarrayf (3),
.BR libsimple_aligned_realloc (3),
.BR libsimple_aligned_reallocarray (3),
.BR libsimple_aligned_vreallocn (3),
.BR libsimple_aligned_reallocf (3),
.BR libsimple_aligned_reallocarrayf (3),
.BR libsimple_aligned_vreallocfn (3),
.BR libsimple_memalign (3),
.BR libsimple_memalignz (3),
.BR libsimple_vmemalignn (3),
.BR libsimple_vmemalignzn (3),
.BR libsimple_enposix_memalign (3),
.BR libsimple_posix_memalignz (3),
.BR libsimple_vposix_memalignn (3),
.BR libsimple_vposix_memalignzn (3),
.BR libsimple_enaligned_alloc (3),
.BR libsimple_aligned_allocz (3),
.BR libsimple_valigned_allocn (3),
.BR libsimple_valigned_alloczn (3),
.BR libsimple_pvalloc (3),
.BR libsimple_pvallocz (3),
.BR libsimple_vpvallocn (3),
.BR libsimple_vpvalloczn (3),
.BR libsimple_valloc (3),
.BR libsimple_vallocz (3),
.BR libsimple_vvallocn (3),
.BR libsimple_vvalloczn (3),
.BR libsimple_vmemalloc (3),
.BR libsimple_varrayalloc (3),
.BR malloc (3)