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/*
* ring.c:
*
* Copyright (c) 2008 James McKenzie <james@fishsoup.dhs.org>,
* All rights reserved.
*
*/
static char rcsid[] = "$Id$";
/*
* $Log$
* Revision 1.4 2008/02/13 16:57:29 james
* *** empty log message ***
*
* Revision 1.3 2008/02/13 09:12:21 james
* *** empty log message ***
*
* Revision 1.2 2008/02/12 22:36:46 james
* *** empty log message ***
*
* Revision 1.1 2008/02/08 15:06:42 james
* *** empty log message ***
*
*/
#include "project.h"
int
ring_read (Ring * r, void *b, int n)
{
int red = 0;
while (n--)
{
if (!ring_read_one (r, b))
break;
b++;
red++;
}
return red;
}
int
ring_write (Ring * r, void *b, int n)
{
int writ = 0;
while (n--)
{
if (!ring_write_one (r, b))
break;
b++;
writ++;
}
return writ;
}
int
ring_space (Ring * r)
{
int i;
i = r->size - RING_NEXT_W (r) + r->rptr;
i %= r->size;
return i;
}
int
ring_bytes (Ring * r)
{
int i;
i = r->size + r->wptr - r->rptr;
i %= r->size;
return i;
}
Ring *
ring_new (int n)
{
Ring *ret = (Ring *) malloc (sizeof (Ring));
ret->ring = (uint8_t *) malloc (n);
ret->size = n;
ret->wptr = ret->rptr = 0;
return ret;
}
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