skalibs

Mirror/fork of https://skarnet.org/software/skalibs/
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cbuffer_wpeek.c (414B)

      1 /* ISC license. */
      2 
      3 #include <sys/uio.h>
      4 #include <skalibs/cbuffer.h>
      5 
      6 void cbuffer_wpeek (cbuffer const *b, struct iovec *v)
      7 {
      8   size_t last = (b->a - 1 + b->p) % b->a ;
      9   v[0].iov_base = b->x + b->n ;
     10   if (last >= b->n)
     11   {
     12     v[0].iov_len = last - b->n ;
     13     v[1].iov_base = 0 ;
     14     v[1].iov_len = 0 ;
     15   }
     16   else
     17   {
     18     v[0].iov_len = b->a - b->n ;
     19     v[1].iov_base = b->x ;
     20     v[1].iov_len = last ;
     21   }
     22 }