skalibs

Mirror/fork of https://skarnet.org/software/skalibs/
git clone https://ccx.te2000.cz/git/skalibs
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buffer_fill.c (330B)

      1 /* ISC license. */
      2 
      3 #include <sys/uio.h>
      4 #include <errno.h>
      5 #include <skalibs/buffer.h>
      6 
      7 ssize_t buffer_fill (buffer *b)
      8 {
      9   struct iovec v[2] ;
     10   ssize_t r ;
     11   if (buffer_isfull(b)) return (errno = ENOBUFS, -1) ;
     12   buffer_wpeek(b, v) ;
     13   r = (*b->op)(b->fd, v, 2) ;
     14   if (r <= 0) return r ;
     15   buffer_wseek(b, r) ;
     16   return r ;
     17 }