/* ISC license. */

#include <skalibs/genalloc.h>
#include <skalibs/diuint.h>
#include <skalibs/djbunix.h>
#include <skalibs/unixmessage.h>

int unixmessage_unput_and_maybe_drop (unixmessage_sender_t *b, int drop)
{
  diuint *start ;
  unsigned int n = genalloc_len(diuint, &b->offsets) ;
  if (!n) return 0 ;
  start = genalloc_s(diuint, &b->offsets) + n - 1 ;
  if (drop)
  {
    register int *fds = genalloc_s(int, &b->fds) + start->right ;
    register unsigned int i = genalloc_len(int, &b->fds) - start->right ;
    while (i--) fd_close(fds[i] < 0 ? -(fds[i]+1) : fds[i]) ;
  }
  b->data.len = start->left ;
  genalloc_setlen(int, &b->fds, start->right) ;
  genalloc_setlen(diuint, &b->offsets, n-1) ;
  return 1 ;
}