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/*
* Copyright (c) 2003-2010 Alexandre Ratchov <alex@caoua.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the
* following disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/types.h>
#include <unistd.h>
#include <fcntl.h>
#include <poll.h>
#include <stdio.h>
#include "dbg.h"
#include "cons.h"
#include "mididev.h"
#include "str.h"
struct raw {
struct mididev mididev; /* device stuff */
char *path; /* eg. "/dev/rmidi3" */
int fd; /* file desc. */
};
void raw_open(struct mididev *);
unsigned raw_read(struct mididev *, unsigned char *, unsigned);
unsigned raw_write(struct mididev *, unsigned char *, unsigned);
unsigned raw_nfds(struct mididev *);
unsigned raw_pollfd(struct mididev *, struct pollfd *, int);
int raw_revents(struct mididev *, struct pollfd *);
void raw_close(struct mididev *);
void raw_del(struct mididev *);
struct devops raw_ops = {
raw_open,
raw_read,
raw_write,
raw_nfds,
raw_pollfd,
raw_revents,
raw_close,
raw_del
};
struct mididev *
raw_new(char *path, unsigned mode)
{
struct raw *dev;
if (path == NULL) {
cons_err("path must be set for raw devices");
return NULL;
}
dev = mem_alloc(sizeof(struct raw), "raw");
mididev_init(&dev->mididev, &raw_ops, mode);
dev->path = str_new(path);
return (struct mididev *)&dev->mididev;
}
void
raw_del(struct mididev *addr)
{
struct raw *dev = (struct raw *)addr;
mididev_done(&dev->mididev);
str_delete(dev->path);
mem_free(dev);
}
void
raw_open(struct mididev *addr)
{
struct raw *dev = (struct raw *)addr;
int mode;
if (dev->mididev.mode == MIDIDEV_MODE_IN) {
mode = O_RDONLY;
} else if (dev->mididev.mode == MIDIDEV_MODE_OUT) {
mode = O_WRONLY;
} else if (dev->mididev.mode == (MIDIDEV_MODE_IN | MIDIDEV_MODE_OUT)) {
mode = O_RDWR;
} else {
dbg_puts("raw_open: not allowed mode\n");
dbg_panic();
mode = 0;
}
dev->fd = open(dev->path, mode, 0666);
if (dev->fd < 0) {
perror(dev->path);
dev->mididev.eof = 1;
return;
}
}
void
raw_close(struct mididev *addr)
{
struct raw *dev = (struct raw *)addr;
if (dev->fd < 0)
return;
(void)close(dev->fd);
dev->fd = -1;
}
unsigned
raw_read(struct mididev *addr, unsigned char *buf, unsigned count)
{
struct raw *dev = (struct raw *)addr;
ssize_t res;
res = read(dev->fd, buf, count);
if (res < 0) {
perror(dev->path);
dev->mididev.eof = 1;
return 0;
}
return res;
}
unsigned
raw_write(struct mididev *addr, unsigned char *buf, unsigned count)
{
struct raw *dev = (struct raw *)addr;
ssize_t res;
res = write(dev->fd, buf, count);
if (res < 0) {
perror(dev->path);
dev->mididev.eof = 1;
return 0;
}
return res;
}
unsigned
raw_nfds(struct mididev *addr)
{
return 1;
}
unsigned
raw_pollfd(struct mididev *addr, struct pollfd *pfd, int events)
{
struct raw *dev = (struct raw *)addr;
pfd->fd = dev->fd;
pfd->events = events;
return 1;
}
int
raw_revents(struct mididev *addr, struct pollfd *pfd)
{
return pfd->revents;
}
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