stralloc_readyplus - provide space in a stralloc

       stralloc_readyplus  makes  sure that sa has enough space allocated to hold an additional len bytes: If sa
       is not allocated, stralloc_ready allocates at least len bytes of space, and returns 1. If sa  is  already
       allocated,  but  not  enough  to hold len additional bytes, stralloc_ready allocates at least sa->len+len
       bytes of space, copies the old string into the new space, frees the old space, and returns 1.  Note  that
       this changes sa.s.

       If stralloc_readyplus runs out of memory, it leaves sa alone and returns 0.

       stralloc_readyplus - provide space in a stralloc

       1 for success, 0 on memory allocation failure.

stralloc_ready(3)

                                                                                           stralloc_readyplus(3)

#include<libowfat/stralloc.h>

       int stralloc_readyplus(stralloc* sa,size_t len);