Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/grep/queue.c	Lines:	35	36	97.2 %
Date:	2017-11-07	Branches:	11	12	91.7 %


/*	$OpenBSD: queue.c,v 1.7 2015/01/16 06:40:08 deraadt Exp $	*/

/*-
 * Copyright (c) 1999 James Howard and Dag-Erling Co�dan Sm�rgrav
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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 AUTHOR 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 AUTHOR 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.
 */

/*
 * A really poor man's queue.  It does only what it has to and gets out of
 * Dodge.
 */

#include <stdlib.h>
#include <string.h>

#include "grep.h"

typedef struct queue {
	struct queue   *next;
	str_t		data;
} queue_t;

static queue_t	*q_head, *q_tail;
static int	 count;

static queue_t	*dequeue(void);

void
initqueue(void)
{
	q_head = q_tail = NULL;
}

static void
free_item(queue_t *item)
{
	free(item);
}

void
enqueue(str_t *x)
{
	queue_t	*item;

	item = grep_malloc(sizeof *item + x->len);
	item->data.len = x->len;
	item->data.line_no = x->line_no;
	item->data.off = x->off;
	item->data.dat = (char *)item + sizeof *item;
	memcpy(item->data.dat, x->dat, x->len);
	item->data.file = x->file;
	item->next = NULL;

	if (!q_head) {
		q_head = q_tail = item;
	} else {
		q_tail->next = item;
		q_tail = item;
	}

	if (++count > Bflag)
		free_item(dequeue());
}

static queue_t *
dequeue(void)
{
	queue_t	*item;

	if (q_head == NULL)
		return NULL;

	--count;
	item = q_head;
	q_head = item->next;
	if (q_head == NULL)
		q_tail = NULL;
	return item;
}

void
printqueue(void)
{
	queue_t *item;

	while ((item = dequeue()) != NULL) {
		printline(&item->data, '-', NULL);
		free_item(item);
	}
}

void
clearqueue(void)
{
	queue_t	*item;

	while ((item = dequeue()) != NULL)
		free_item(item);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: queue.c,v 1.7 2015/01/16 06:40:08 deraadt Exp $ */
2
3			/*-
4			* Copyright (c) 1999 James Howard and Dag-Erling Co�dan Sm�rgrav
5			* All rights reserved.
6			*
7			* Redistribution and use in source and binary forms, with or without
8			* modification, are permitted provided that the following conditions
9			* are met:
10			* 1. Redistributions of source code must retain the above copyright
11			* notice, this list of conditions and the following disclaimer.
12			* 2. Redistributions in binary form must reproduce the above copyright
13			* notice, this list of conditions and the following disclaimer in the
14			* documentation and/or other materials provided with the distribution.
15			*
16			* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19			* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26			* SUCH DAMAGE.
27			*/
28
29			/*
30			* A really poor man's queue. It does only what it has to and gets out of
31			* Dodge.
32			*/
33
34			#include <stdlib.h>
35			#include <string.h>
36
37			#include "grep.h"
38
39			typedef struct queue {
40			struct queue *next;
41			str_t data;
42			} queue_t;
43
44			static queue_t q_head, q_tail;
45			static int count;
46
47			static queue_t *dequeue(void);
48
49			void
50			initqueue(void)
51			{
52		18	q_head = q_tail = NULL;
53		9	}
54
55			static void
56			free_item(queue_t *item)
57			{
58		54	free(item);
59		27	}
60
61			void
62			enqueue(str_t *x)
63			{
64			queue_t *item;
65
66		54	item = grep_malloc(sizeof *item + x->len);
67		27	item->data.len = x->len;
68		27	item->data.line_no = x->line_no;
69		27	item->data.off = x->off;
70		27	item->data.dat = (char )item + sizeof item;
71		27	memcpy(item->data.dat, x->dat, x->len);
72		27	item->data.file = x->file;
73		27	item->next = NULL;
74
75	✓✓	27	if (!q_head) {
76		9	q_head = q_tail = item;
77		9	} else {
78		18	q_tail->next = item;
79		18	q_tail = item;
80			}
81
82	✓✓	27	if (++count > Bflag)
83		18	free_item(dequeue());
84		27	}
85
86			static queue_t *
87			dequeue(void)
88			{
89			queue_t *item;
90
91	✓✓	90	if (q_head == NULL)
92		18	return NULL;
93
94		27	--count;
95		27	item = q_head;
96		27	q_head = item->next;
97	✓✓	27	if (q_head == NULL)
98		9	q_tail = NULL;
99		27	return item;
100		45	}
101
102			void
103			printqueue(void)
104			{
105			queue_t *item;
106
107	✓✓	45	while ((item = dequeue()) != NULL) {
108		9	printline(&item->data, '-', NULL);
109		9	free_item(item);
110			}
111		9	}
112
113			void
114			clearqueue(void)
115			{
116			queue_t *item;
117
118	✗✓	27	while ((item = dequeue()) != NULL)
119			free_item(item);
120		9	}