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/* $OpenBSD: mio.c,v 1.13 2011/11/15 08:05:22 ratchov Exp $ */
/*
* Copyright (c) 2008 Alexandre Ratchov <alex@caoua.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <errno.h>
#include <fcntl.h>
#include <poll.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "debug.h"
#include "mio_priv.h"
struct mio_hdl *
mio_open(const char *str, unsigned mode, int nbio)
{
struct mio_hdl *hdl;
const char *p;
#ifdef DEBUG
sndio_debug_init();
#endif
if ((mode & (MIO_OUT | MIO_IN)) == 0)
return NULL;
if (str == NULL && !issetugid())
str = getenv("MIDIDEVICE");
if (str == NULL) {
hdl = mio_aucat_open("/0", mode, nbio, 1);
if (hdl != NULL)
return hdl;
return mio_rmidi_open("/0", mode, nbio);
}
if ((p = sndio_parsetype(str, "snd")) != NULL ||
(p = sndio_parsetype(str, "aucat")) != NULL)
return mio_aucat_open(p, mode, nbio, 0);
if ((p = sndio_parsetype(str, "midithru")) != NULL)
return mio_aucat_open(p, mode, nbio, 1);
if ((p = sndio_parsetype(str, "rmidi")) != NULL)
return mio_rmidi_open(p, mode, nbio);
DPRINTF("mio_open: %s: unknown device type\n", str);
return NULL;
}
void
mio_create(struct mio_hdl *hdl, struct mio_ops *ops, unsigned mode, int nbio)
{
hdl->ops = ops;
hdl->mode = mode;
hdl->nbio = nbio;
hdl->eof = 0;
}
void
mio_close(struct mio_hdl *hdl)
{
hdl->ops->close(hdl);
}
size_t
mio_read(struct mio_hdl *hdl, void *buf, size_t len)
{
if (hdl->eof) {
DPRINTF("mio_read: eof\n");
return 0;
}
if (!(hdl->mode & MIO_IN)) {
DPRINTF("mio_read: not input device\n");
hdl->eof = 1;
return 0;
}
if (len == 0) {
DPRINTF("mio_read: zero length read ignored\n");
return 0;
}
return hdl->ops->read(hdl, buf, len);
}
size_t
mio_write(struct mio_hdl *hdl, const void *buf, size_t len)
{
if (hdl->eof) {
DPRINTF("mio_write: eof\n");
return 0;
}
if (!(hdl->mode & MIO_OUT)) {
DPRINTF("mio_write: not output device\n");
hdl->eof = 1;
return 0;
}
if (len == 0) {
DPRINTF("mio_write: zero length write ignored\n");
return 0;
}
return hdl->ops->write(hdl, buf, len);
}
int
mio_nfds(struct mio_hdl *hdl)
{
return 1;
}
int
mio_pollfd(struct mio_hdl *hdl, struct pollfd *pfd, int events)
{
if (hdl->eof)
return 0;
return hdl->ops->pollfd(hdl, pfd, events);
}
int
mio_revents(struct mio_hdl *hdl, struct pollfd *pfd)
{
if (hdl->eof)
return POLLHUP;
return hdl->ops->revents(hdl, pfd);
}
int
mio_eof(struct mio_hdl *hdl)
{
return hdl->eof;
}
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