writev.c

Algorithms for Image Processing and Computer Vision Source Code

/* This is file WRITEV.C */
/*
** Copyright (C) 1993 DJ Delorie, 24 Kirsten Ave, Rochester NH 03867-2954
**
** This file is distributed under the terms listed in the document
** "copying.dj", available from DJ Delorie at the address above.
** A copy of "copying.dj" should accompany this file; if not, a copy
** should be available from where this file was obtained.  This file
** may not be distributed without a verbatim copy of "copying.dj".
**
** This file is distributed WITHOUT ANY WARRANTY; without even the implied
** warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*/

#include <stdlib.h>
#include <sys/types.h>
#include <sys/uio.h>

size_t
writev(int handle, struct iovec *iov, size_t count)
{
  long r, t=0;
  while (count)
  {
    r = write(handle, iov->iov_base, iov->iov_len);
    if (r < 0)
      return r;
    t += r;
    iov++;
    count--;
  }
  return t;
}