GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libsndio/mio_rmidi.c Lines: 0 76 0.0 %
Date: 2017-11-13 Branches: 0 58 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: mio_rmidi.c,v 1.25 2017/11/04 09:35:56 ratchov Exp $	*/
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/*
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 * Copyright (c) 2008 Alexandre Ratchov <alex@caoua.org>
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 *
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 * Permission to use, copy, modify, and distribute this software for any
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 * purpose with or without fee is hereby granted, provided that the above
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 * copyright notice and this permission notice appear in all copies.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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 */
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <poll.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "debug.h"
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#include "mio_priv.h"
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#define DEVPATH_PREFIX	"/dev/rmidi"
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#define DEVPATH_MAX 	(1 +		\
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	sizeof(DEVPATH_PREFIX) - 1 +	\
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	sizeof(int) * 3)
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struct mio_rmidi_hdl {
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	struct mio_hdl mio;
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	int fd;
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};
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static void mio_rmidi_close(struct mio_hdl *);
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static size_t mio_rmidi_read(struct mio_hdl *, void *, size_t);
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static size_t mio_rmidi_write(struct mio_hdl *, const void *, size_t);
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static int mio_rmidi_nfds(struct mio_hdl *);
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static int mio_rmidi_pollfd(struct mio_hdl *, struct pollfd *, int);
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static int mio_rmidi_revents(struct mio_hdl *, struct pollfd *);
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static struct mio_ops mio_rmidi_ops = {
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	mio_rmidi_close,
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	mio_rmidi_write,
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	mio_rmidi_read,
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	mio_rmidi_nfds,
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	mio_rmidi_pollfd,
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	mio_rmidi_revents
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};
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int
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mio_rmidi_getfd(const char *str, unsigned int mode, int nbio)
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{
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	const char *p;
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	char path[DEVPATH_MAX];
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	unsigned int devnum;
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	int fd, flags;
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#ifdef DEBUG
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	_sndio_debug_init();
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#endif
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	p = _sndio_parsetype(str, "rmidi");
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	if (p == NULL) {
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		DPRINTF("mio_rmidi_getfd: %s: \"rsnd\" expected\n", str);
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		return -1;
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	}
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	switch (*p) {
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	case '/':
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		p++;
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		break;
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	default:
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		DPRINTF("mio_rmidi_getfd: %s: '/' expected\n", str);
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		return -1;
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	}
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	p = _sndio_parsenum(p, &devnum, 255);
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	if (p == NULL) {
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		DPRINTF("mio_rmidi_getfd: %s: number expected after '/'\n", str);
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		return -1;
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	}
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	if (*p != '\0') {
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		DPRINTF("mio_rmidi_getfd: junk at end of string: %s\n", p);
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		return -1;
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	}
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	snprintf(path, sizeof(path), DEVPATH_PREFIX "%u", devnum);
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	if (mode == (MIO_IN | MIO_OUT))
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		flags = O_RDWR;
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	else
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		flags = (mode & MIO_OUT) ? O_WRONLY : O_RDONLY;
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	while ((fd = open(path, flags | O_NONBLOCK | O_CLOEXEC)) < 0) {
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		if (errno == EINTR)
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			continue;
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		DPERROR(path);
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		return -1;
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	}
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	return fd;
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}
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struct mio_hdl *
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mio_rmidi_fdopen(int fd, unsigned int mode, int nbio)
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{
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	struct mio_rmidi_hdl *hdl;
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#ifdef DEBUG
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	_sndio_debug_init();
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#endif
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	hdl = malloc(sizeof(struct mio_rmidi_hdl));
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	if (hdl == NULL)
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		return NULL;
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	_mio_create(&hdl->mio, &mio_rmidi_ops, mode, nbio);
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	hdl->fd = fd;
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	return (struct mio_hdl *)hdl;
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}
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struct mio_hdl *
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_mio_rmidi_open(const char *str, unsigned int mode, int nbio)
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{
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	struct mio_hdl *hdl;
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	int fd;
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	fd = mio_rmidi_getfd(str, mode, nbio);
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	if (fd < 0)
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		return NULL;
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	hdl = mio_rmidi_fdopen(fd, mode, nbio);
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	if (hdl != NULL)
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		return hdl;
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	while (close(fd) < 0 && errno == EINTR)
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		; /* retry */
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	return NULL;
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}
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static void
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mio_rmidi_close(struct mio_hdl *sh)
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{
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	struct mio_rmidi_hdl *hdl = (struct mio_rmidi_hdl *)sh;
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	int rc;
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	do {
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		rc = close(hdl->fd);
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	} while (rc < 0 && errno == EINTR);
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	free(hdl);
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}
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static size_t
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mio_rmidi_read(struct mio_hdl *sh, void *buf, size_t len)
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{
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	struct mio_rmidi_hdl *hdl = (struct mio_rmidi_hdl *)sh;
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	ssize_t n;
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	while ((n = read(hdl->fd, buf, len)) < 0) {
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		if (errno == EINTR)
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			continue;
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		if (errno != EAGAIN) {
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			DPERROR("mio_rmidi_read: read");
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			hdl->mio.eof = 1;
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		}
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		return 0;
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	}
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	if (n == 0) {
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		DPRINTF("mio_rmidi_read: eof\n");
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		hdl->mio.eof = 1;
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		return 0;
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	}
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	return n;
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}
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static size_t
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mio_rmidi_write(struct mio_hdl *sh, const void *buf, size_t len)
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{
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	struct mio_rmidi_hdl *hdl = (struct mio_rmidi_hdl *)sh;
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	ssize_t n;
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	while ((n = write(hdl->fd, buf, len)) < 0) {
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		if (errno == EINTR)
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			continue;
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		if (errno != EAGAIN) {
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			DPERROR("mio_rmidi_write: write");
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			hdl->mio.eof = 1;
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		}
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		return 0;
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	}
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	return n;
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}
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static int
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mio_rmidi_nfds(struct mio_hdl *sh)
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{
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	return 1;
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}
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static int
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mio_rmidi_pollfd(struct mio_hdl *sh, struct pollfd *pfd, int events)
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{
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	struct mio_rmidi_hdl *hdl = (struct mio_rmidi_hdl *)sh;
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	pfd->fd = hdl->fd;
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	pfd->events = events;
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	return 1;
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}
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static int
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mio_rmidi_revents(struct mio_hdl *sh, struct pollfd *pfd)
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{
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	return pfd->revents;
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}