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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/sndiod/abuf.c	Lines:	0	45	0.0 %
Date:	2016-12-06	Branches:	0	20	0.0 %


/*	$OpenBSD: abuf.c,v 1.4 2016/01/08 16:17:31 ratchov Exp $	*/
/*
 * Copyright (c) 2008-2012 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.
 */
/*
 * Simple byte fifo.
 *
 * The abuf data is split in two parts: (1) valid data available to the reader
 * (2) space available to the writer, which is not necessarily unused. It works
 * as follows: the write starts filling at offset (start + used), once the data
 * is ready, the writer adds to used the count of bytes available.
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "abuf.h"
#include "utils.h"

#ifdef DEBUG
void
abuf_log(struct abuf *buf)
{
	log_putu(buf->start);
	log_puts("+");
	log_putu(buf->used);
	log_puts("/");
	log_putu(buf->len);
}
#endif

void
abuf_init(struct abuf *buf, unsigned int len)
{
	buf->data = xmalloc(len);
	buf->len = len;
	buf->used = 0;
	buf->start = 0;
}

void
abuf_done(struct abuf *buf)
{
#ifdef DEBUG
	if (buf->used > 0) {
		if (log_level >= 3) {
			log_puts("deleting non-empty buffer, used = ");
			log_putu(buf->used);
			log_puts("\n");
		}
	}
#endif
	xfree(buf->data);
	buf->data = (void *)0xdeadbeef;
}

/*
 * return the reader pointer and the number of bytes available
 */
unsigned char *
abuf_rgetblk(struct abuf *buf, int *rsize)
{
	int count;

	count = buf->len - buf->start;
	if (count > buf->used)
		count = buf->used;
	*rsize = count;
	return buf->data + buf->start;
}

/*
 * discard "count" bytes at the start postion.
 */
void
abuf_rdiscard(struct abuf *buf, int count)
{
#ifdef DEBUG
	if (count < 0 || count > buf->used) {
		log_puts("abuf_rdiscard: bad count = ");
		log_putu(count);
		log_puts("\n");
		panic();
	}
#endif
	buf->used -= count;
	buf->start += count;
	if (buf->start >= buf->len)
		buf->start -= buf->len;
}

/*
 * advance the writer pointer by "count" bytes
 */
void
abuf_wcommit(struct abuf *buf, int count)
{
#ifdef DEBUG
	if (count < 0 || count > (buf->len - buf->used)) {
		log_puts("abuf_wcommit: bad count = ");
		log_putu(count);
		log_puts("\n");
		panic();
	}
#endif
	buf->used += count;
}

/*
 * get writer pointer and the number of bytes writable
 */
unsigned char *
abuf_wgetblk(struct abuf *buf, int *rsize)
{
	int end, avail, count;

	end = buf->start + buf->used;
	if (end >= buf->len)
		end -= buf->len;
	avail = buf->len - buf->used;
	count = buf->len - end;
	if (count > avail)
		count = avail;
	*rsize = count;
	return buf->data + end;
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: abuf.c,v 1.4 2016/01/08 16:17:31 ratchov Exp $ */
2			/*
3			* Copyright (c) 2008-2012 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			* Simple byte fifo.
19			*
20			* The abuf data is split in two parts: (1) valid data available to the reader
21			* (2) space available to the writer, which is not necessarily unused. It works
22			* as follows: the write starts filling at offset (start + used), once the data
23			* is ready, the writer adds to used the count of bytes available.
24			*/
25			#include <stdio.h>
26			#include <stdlib.h>
27			#include <string.h>
28
29			#include "abuf.h"
30			#include "utils.h"
31
32			#ifdef DEBUG
33			void
34			abuf_log(struct abuf *buf)
35			{
36			log_putu(buf->start);
37			log_puts("+");
38			log_putu(buf->used);
39			log_puts("/");
40			log_putu(buf->len);
41			}
42			#endif
43
44			void
45			abuf_init(struct abuf *buf, unsigned int len)
46			{
47			buf->data = xmalloc(len);
48			buf->len = len;
49			buf->used = 0;
50			buf->start = 0;
51			}
52
53			void
54			abuf_done(struct abuf *buf)
55			{
56			#ifdef DEBUG
57			if (buf->used > 0) {
58			if (log_level >= 3) {
59			log_puts("deleting non-empty buffer, used = ");
60			log_putu(buf->used);
61			log_puts("\n");
62			}
63			}
64			#endif
65			xfree(buf->data);
66			buf->data = (void *)0xdeadbeef;
67			}
68
69			/*
70			* return the reader pointer and the number of bytes available
71			*/
72			unsigned char *
73			abuf_rgetblk(struct abuf buf, int rsize)
74			{
75			int count;
76
77			count = buf->len - buf->start;
78			if (count > buf->used)
79			count = buf->used;
80			*rsize = count;
81			return buf->data + buf->start;
82			}
83
84			/*
85			* discard "count" bytes at the start postion.
86			*/
87			void
88			abuf_rdiscard(struct abuf *buf, int count)
89			{
90			#ifdef DEBUG
91			if (count < 0 \|\| count > buf->used) {
92			log_puts("abuf_rdiscard: bad count = ");
93			log_putu(count);
94			log_puts("\n");
95			panic();
96			}
97			#endif
98			buf->used -= count;
99			buf->start += count;
100			if (buf->start >= buf->len)
101			buf->start -= buf->len;
102			}
103
104			/*
105			* advance the writer pointer by "count" bytes
106			*/
107			void
108			abuf_wcommit(struct abuf *buf, int count)
109			{
110			#ifdef DEBUG
111			if (count < 0 \|\| count > (buf->len - buf->used)) {
112			log_puts("abuf_wcommit: bad count = ");
113			log_putu(count);
114			log_puts("\n");
115			panic();
116			}
117			#endif
118			buf->used += count;
119			}
120
121			/*
122			* get writer pointer and the number of bytes writable
123			*/
124			unsigned char *
125			abuf_wgetblk(struct abuf buf, int rsize)
126			{
127			int end, avail, count;
128
129			end = buf->start + buf->used;
130			if (end >= buf->len)
131			end -= buf->len;
132			avail = buf->len - buf->used;
133			count = buf->len - end;
134			if (count > avail)
135			count = avail;
136			*rsize = count;
137			return buf->data + end;
138			}