skalibs

Mirror/fork of https://skarnet.org/software/skalibs/
git clone https://ccx.te2000.cz/git/skalibs
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buffer_getvall.c (697B)

      1 /* ISC license. */
      2 
      3 #include <sys/uio.h>
      4 #include <errno.h>
      5 #include <skalibs/allreadwrite.h>
      6 #include <skalibs/buffer.h>
      7 #include <skalibs/siovec.h>
      8 
      9 int buffer_getvall (buffer *b, struct iovec const *v, unsigned int n, size_t *written)
     10 {
     11   size_t len = siovec_len(v, n) ;
     12   struct iovec vv[n ? n : 1] ;
     13   if (*written > len) return (errno = EINVAL, -1) ;
     14   {
     15     unsigned int i = n ;
     16     while (i--) vv[i] = v[i] ;
     17   }
     18   siovec_seek(vv, n, *written) ;
     19   for (;;)
     20   {
     21     ssize_t r ;
     22     size_t w = buffer_getvnofill(b, vv, n) ;
     23     *written += w ;
     24     if (*written >= len) break ;
     25     siovec_seek(vv, n, w) ;
     26     r = sanitize_read(buffer_fill(b)) ;
     27     if (r <= 0) return r ;
     28   }
     29   return 1 ;
     30 }