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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libsndio/mio.c	Lines:	0	94	0.0 %
Date:	2017-11-13	Branches:	0	92	0.0 %


/*	$OpenBSD: mio.c,v 1.20 2015/11/22 12:01:23 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/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 int mode, int nbio)
{
	static char portany[] = MIO_PORTANY;
	struct mio_hdl *hdl;

#ifdef DEBUG
	_sndio_debug_init();
#endif
	if ((mode & (MIO_OUT | MIO_IN)) == 0)
		return NULL;
	if (str == NULL) /* backward compat */
		str = portany;
	if (strcmp(str, portany) == 0 && !issetugid()) {
		str = getenv("MIDIDEVICE");
		if (str == NULL)
			str = portany;
	}
	if (strcmp(str, portany) == 0) {
		hdl = _mio_aucat_open("midithru/0", mode, nbio);
		if (hdl != NULL)
			return hdl;
		return _mio_rmidi_open("rmidi/0", mode, nbio);
	}
	if (_sndio_parsetype(str, "snd") ||
	    _sndio_parsetype(str, "midithru") ||
	    _sndio_parsetype(str, "midi"))
		return _mio_aucat_open(str, mode, nbio);
	if (_sndio_parsetype(str, "rmidi"))
		return _mio_rmidi_open(str, 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 int 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);
}

static int
mio_psleep(struct mio_hdl *hdl, int event)
{
	struct pollfd pfd[MIO_MAXNFDS];
	int revents;
	int nfds;

	nfds = mio_nfds(hdl);
	if (nfds > MIO_MAXNFDS) {
		DPRINTF("mio_psleep: %d: too many descriptors\n", nfds);
		hdl->eof = 1;
		return 0;
	}
	for (;;) {
		nfds = mio_pollfd(hdl, pfd, event);
		while (poll(pfd, nfds, -1) < 0) {
			if (errno == EINTR)
				continue;
			DPERROR("mio_psleep: poll");
			hdl->eof = 1;
			return 0;
		}
		revents = mio_revents(hdl, pfd);
		if (revents & POLLHUP) {
			DPRINTF("mio_psleep: hang-up\n");
			return 0;
		}
		if (revents & event)
			break;
	}
	return 1;
}

size_t
mio_read(struct mio_hdl *hdl, void *buf, size_t len)
{
	unsigned int n;
	char *data = buf;
	size_t todo = 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;
	}
	while (todo > 0) {
		n = hdl->ops->read(hdl, data, todo);
		if (n == 0 && hdl->eof)
			break;
		data += n;
		todo -= n;
		if (n > 0 || hdl->nbio)
			break;
		if (!mio_psleep(hdl, POLLIN))
			break;
	}
	return len - todo;
}

size_t
mio_write(struct mio_hdl *hdl, const void *buf, size_t len)
{
	unsigned int n;
	const unsigned char *data = buf;
	size_t todo = 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;
	}
	if (todo == 0) {
		DPRINTF("mio_write: zero length write ignored\n");
		return 0;
	}
	while (todo > 0) {
		n = hdl->ops->write(hdl, data, todo);
		if (n == 0) {
			if (hdl->nbio || hdl->eof)
				break;
			if (!mio_psleep(hdl, POLLOUT))
				break;
			continue;
		}
		data += n;
		todo -= n;
	}
	return len - todo;
}

int
mio_nfds(struct mio_hdl *hdl)
{
	return hdl->ops->nfds(hdl);
}

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;
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: mio.c,v 1.20 2015/11/22 12:01:23 ratchov Exp $ */
2			/*
3			* Copyright (c) 2008 Alexandre Ratchov <alex@caoua.org>
4			*
5			* Permission to use, copy, modify, and distribute this software for any
6			* purpose with or without fee is hereby granted, provided that the above
7			* copyright notice and this permission notice appear in all copies.
8			*
9			* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10			* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11			* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12			* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13			* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14			* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15			* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16			*/
17
18			#include <sys/types.h>
19			#include <sys/time.h>
20			#include <sys/stat.h>
21
22			#include <errno.h>
23			#include <fcntl.h>
24			#include <poll.h>
25			#include <stdio.h>
26			#include <stdlib.h>
27			#include <string.h>
28			#include <unistd.h>
29
30			#include "debug.h"
31			#include "mio_priv.h"
32
33			struct mio_hdl *
34			mio_open(const char *str, unsigned int mode, int nbio)
35			{
36			static char portany[] = MIO_PORTANY;
37			struct mio_hdl *hdl;
38
39			#ifdef DEBUG
40			_sndio_debug_init();
41			#endif
42			if ((mode & (MIO_OUT \| MIO_IN)) == 0)
43			return NULL;
44			if (str == NULL) /* backward compat */
45			str = portany;
46			if (strcmp(str, portany) == 0 && !issetugid()) {
47			str = getenv("MIDIDEVICE");
48			if (str == NULL)
49			str = portany;
50			}
51			if (strcmp(str, portany) == 0) {
52			hdl = _mio_aucat_open("midithru/0", mode, nbio);
53			if (hdl != NULL)
54			return hdl;
55			return _mio_rmidi_open("rmidi/0", mode, nbio);
56			}
57			if (_sndio_parsetype(str, "snd") \|\|
58			_sndio_parsetype(str, "midithru") \|\|
59			_sndio_parsetype(str, "midi"))
60			return _mio_aucat_open(str, mode, nbio);
61			if (_sndio_parsetype(str, "rmidi"))
62			return _mio_rmidi_open(str, mode, nbio);
63			DPRINTF("mio_open: %s: unknown device type\n", str);
64			return NULL;
65			}
66
67			void
68			_mio_create(struct mio_hdl hdl, struct mio_ops ops,
69			unsigned int mode, int nbio)
70			{
71			hdl->ops = ops;
72			hdl->mode = mode;
73			hdl->nbio = nbio;
74			hdl->eof = 0;
75			}
76
77			void
78			mio_close(struct mio_hdl *hdl)
79			{
80			hdl->ops->close(hdl);
81			}
82
83			static int
84			mio_psleep(struct mio_hdl *hdl, int event)
85			{
86			struct pollfd pfd[MIO_MAXNFDS];
87			int revents;
88			int nfds;
89
90			nfds = mio_nfds(hdl);
91			if (nfds > MIO_MAXNFDS) {
92			DPRINTF("mio_psleep: %d: too many descriptors\n", nfds);
93			hdl->eof = 1;
94			return 0;
95			}
96			for (;;) {
97			nfds = mio_pollfd(hdl, pfd, event);
98			while (poll(pfd, nfds, -1) < 0) {
99			if (errno == EINTR)
100			continue;
101			DPERROR("mio_psleep: poll");
102			hdl->eof = 1;
103			return 0;
104			}
105			revents = mio_revents(hdl, pfd);
106			if (revents & POLLHUP) {
107			DPRINTF("mio_psleep: hang-up\n");
108			return 0;
109			}
110			if (revents & event)
111			break;
112			}
113			return 1;
114			}
115
116			size_t
117			mio_read(struct mio_hdl hdl, void buf, size_t len)
118			{
119			unsigned int n;
120			char *data = buf;
121			size_t todo = len;
122
123			if (hdl->eof) {
124			DPRINTF("mio_read: eof\n");
125			return 0;
126			}
127			if (!(hdl->mode & MIO_IN)) {
128			DPRINTF("mio_read: not input device\n");
129			hdl->eof = 1;
130			return 0;
131			}
132			if (len == 0) {
133			DPRINTF("mio_read: zero length read ignored\n");
134			return 0;
135			}
136			while (todo > 0) {
137			n = hdl->ops->read(hdl, data, todo);
138			if (n == 0 && hdl->eof)
139			break;
140			data += n;
141			todo -= n;
142			if (n > 0 \|\| hdl->nbio)
143			break;
144			if (!mio_psleep(hdl, POLLIN))
145			break;
146			}
147			return len - todo;
148			}
149
150			size_t
151			mio_write(struct mio_hdl hdl, const void buf, size_t len)
152			{
153			unsigned int n;
154			const unsigned char *data = buf;
155			size_t todo = len;
156
157			if (hdl->eof) {
158			DPRINTF("mio_write: eof\n");
159			return 0;
160			}
161			if (!(hdl->mode & MIO_OUT)) {
162			DPRINTF("mio_write: not output device\n");
163			hdl->eof = 1;
164			return 0;
165			}
166			if (len == 0) {
167			DPRINTF("mio_write: zero length write ignored\n");
168			return 0;
169			}
170			if (todo == 0) {
171			DPRINTF("mio_write: zero length write ignored\n");
172			return 0;
173			}
174			while (todo > 0) {
175			n = hdl->ops->write(hdl, data, todo);
176			if (n == 0) {
177			if (hdl->nbio \|\| hdl->eof)
178			break;
179			if (!mio_psleep(hdl, POLLOUT))
180			break;
181			continue;
182			}
183			data += n;
184			todo -= n;
185			}
186			return len - todo;
187			}
188
189			int
190			mio_nfds(struct mio_hdl *hdl)
191			{
192			return hdl->ops->nfds(hdl);
193			}
194
195			int
196			mio_pollfd(struct mio_hdl hdl, struct pollfd pfd, int events)
197			{
198			if (hdl->eof)
199			return 0;
200			return hdl->ops->pollfd(hdl, pfd, events);
201			}
202
203			int
204			mio_revents(struct mio_hdl hdl, struct pollfd pfd)
205			{
206			if (hdl->eof)
207			return POLLHUP;
208			return hdl->ops->revents(hdl, pfd);
209			}
210
211			int
212			mio_eof(struct mio_hdl *hdl)
213			{
214			return hdl->eof;
215			}