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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/npppd/npppd/../common/hash.c	Lines:	0	68	0.0 %
Date:	2017-11-07	Branches:	0	42	0.0 %


/*	$OpenBSD: hash.c,v 1.5 2015/12/17 08:01:55 tb Exp $ */
/*-
 * Copyright (c) 2009 Internet Initiative Japan Inc.
 * 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.
 */
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "hash.h"

/* hash_create - Create a new hash table.
 * Returns a pointer of new hash_table on success.  Otherwise returns
 * NULL.
 */
hash_table *
hash_create(cmp_func, hash_func, hsz)
	int (*cmp_func) (const void *, const void *);
	uint32_t (*hash_func) (const void *, int);
	int hsz;
{
	hash_table *htbl;

	htbl = malloc(sizeof(hash_table));
	if (htbl == NULL)
		return NULL;

	if (hsz < 1)
		htbl->size = HASH_SIZE;
	else
		htbl->size = hsz;

	htbl->bucket = calloc(htbl->size, sizeof(hash_link *));
	htbl->cmp = cmp_func;
	htbl->hash = hash_func;
	htbl->cur = 0;
	htbl->bucket_cur = NULL;

	return htbl;
}

/* hash_first - Get first item from hash table.
 * Returns a pointer of first bucket on success.  Otherwise returns
 * NULL.
 */
hash_link *
hash_first(htbl)
	hash_table *htbl;
{
	htbl->cur = 0;
	htbl->bucket_cur = NULL;
	return hash_next(htbl);
}

/* hash_next -  Get next item from hash table.
 * Returns a pointer of next bucket on success.  Otherwise returns
 * NULL.
 */
hash_link *
hash_next(htbl)
	hash_table *htbl;
{
	hash_link *hlink;

	if (htbl->bucket_cur != NULL) {
		hlink = htbl->bucket_cur;
		htbl->bucket_cur = hlink->next;
		return hlink;
	}
	while (htbl->cur < htbl->size) {
		if (htbl->bucket[htbl->cur] != NULL) {
			hlink = htbl->bucket[htbl->cur++];
			htbl->bucket_cur = hlink->next;
			return hlink;
		}
		htbl->cur++;
	}
	return NULL;
}

/* hash_lookup - Lookup item under the key in hash table.
 * Return a pointer of the bucket on success.  Otherwise returns
 * NULL
 */
hash_link *
hash_lookup(htbl, k)
	hash_table *htbl;
	const void *k;
{
	int c;
	hash_link *w;

	if (htbl == NULL || k == NULL)
		return NULL;
	c = (htbl->hash) (k, (int)htbl->size);
	for (w = htbl->bucket[c]; w != NULL; w = w->next)
		if (htbl->cmp(w->key, k) == 0)
			return w;
	return NULL;
}

/* hash_insert - Insert a item into hash table.
 * Return 0 on success.  Return -1 on failure.
 */
int
hash_insert(htbl, k, i)
	hash_table *htbl;
	const void *k;
	void *i;
{
	int c;
	hash_link *n;

	if (htbl == NULL || k == NULL)
		return -1;

	if ((n = malloc(sizeof(hash_link))) == NULL) {
		return -1;
	}

	c = (htbl->hash) (k, (int)htbl->size);

	n->item = i;
	n->key = k;
	n->next = htbl->bucket[c];
	htbl->bucket[c] = n;

	return 0;
}

/* hash_delete - Remove a item from hash table.
 * If memfree then free the item.  Return 0 on success.  Return -1
 * on failure.
 */
int
hash_delete(htbl, k, memfree)
	hash_table *htbl;
	const void *k;
	int memfree;
{
	int i;
	hash_link *b, *w;

	if (htbl == NULL || k == NULL)
		return -1;

	i = (htbl->hash) (k, (int)htbl->size);

	for (w = htbl->bucket[i], b = NULL; w != NULL; w = w->next) {
		if (htbl->cmp(w->key, k) == 0) {
			if (b != NULL)
				b->next = w->next;
			else
				htbl->bucket[i] = w->next;

			if (htbl->bucket_cur == w)
				htbl->bucket_cur = w->next;

			if (w->item != NULL && memfree) {
				free(w->item);
			}
			free(w);
			return 0;
		}
		b = w;
	}
	return -1;
}

/*
 * delete all items from this hash_table.
 * If memfree != 0 then free items.
 */
void
hash_delete_all(htbl, memfree)
	hash_table *htbl;
	int memfree;
{
	int i;
	hash_link *w, *hl;

	for (i = 0; i < htbl->size; i++) {
		hl = htbl->bucket[i];
		htbl->bucket[i] = NULL;
		while (hl != NULL) {
			w = hl;
			hl = hl->next;
			if (memfree && w->item != NULL)
				free(w->item);
			free(w);
		}
	}
}

/* hash_free - Free hash table and all buckets.
 */
void
hash_free(htbl)
	hash_table *htbl;
{
	if (htbl != NULL) {
		free(htbl->bucket);
		free(htbl);
	}
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: hash.c,v 1.5 2015/12/17 08:01:55 tb Exp $ */
2			/*-
3			* Copyright (c) 2009 Internet Initiative Japan Inc.
4			* All rights reserved.
5			*
6			* Redistribution and use in source and binary forms, with or without
7			* modification, are permitted provided that the following conditions
8			* are met:
9			* 1. Redistributions of source code must retain the above copyright
10			* notice, this list of conditions and the following disclaimer.
11			* 2. Redistributions in binary form must reproduce the above copyright
12			* notice, this list of conditions and the following disclaimer in the
13			* documentation and/or other materials provided with the distribution.
14			*
15			* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18			* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25			* SUCH DAMAGE.
26			*/
27			#include <sys/types.h>
28			#include <stdio.h>
29			#include <stdlib.h>
30			#include <string.h>
31
32			#include "hash.h"
33
34			/* hash_create - Create a new hash table.
35			* Returns a pointer of new hash_table on success. Otherwise returns
36			* NULL.
37			*/
38			hash_table *
39			hash_create(cmp_func, hash_func, hsz)
40			int (cmp_func) (const void , const void *);
41			uint32_t (hash_func) (const void , int);
42			int hsz;
43			{
44			hash_table *htbl;
45
46			htbl = malloc(sizeof(hash_table));
47			if (htbl == NULL)
48			return NULL;
49
50			if (hsz < 1)
51			htbl->size = HASH_SIZE;
52			else
53			htbl->size = hsz;
54
55			htbl->bucket = calloc(htbl->size, sizeof(hash_link *));
56			htbl->cmp = cmp_func;
57			htbl->hash = hash_func;
58			htbl->cur = 0;
59			htbl->bucket_cur = NULL;
60
61			return htbl;
62			}
63
64			/* hash_first - Get first item from hash table.
65			* Returns a pointer of first bucket on success. Otherwise returns
66			* NULL.
67			*/
68			hash_link *
69			hash_first(htbl)
70			hash_table *htbl;
71			{
72			htbl->cur = 0;
73			htbl->bucket_cur = NULL;
74			return hash_next(htbl);
75			}
76
77			/* hash_next - Get next item from hash table.
78			* Returns a pointer of next bucket on success. Otherwise returns
79			* NULL.
80			*/
81			hash_link *
82			hash_next(htbl)
83			hash_table *htbl;
84			{
85			hash_link *hlink;
86
87			if (htbl->bucket_cur != NULL) {
88			hlink = htbl->bucket_cur;
89			htbl->bucket_cur = hlink->next;
90			return hlink;
91			}
92			while (htbl->cur < htbl->size) {
93			if (htbl->bucket[htbl->cur] != NULL) {
94			hlink = htbl->bucket[htbl->cur++];
95			htbl->bucket_cur = hlink->next;
96			return hlink;
97			}
98			htbl->cur++;
99			}
100			return NULL;
101			}
102
103			/* hash_lookup - Lookup item under the key in hash table.
104			* Return a pointer of the bucket on success. Otherwise returns
105			* NULL
106			*/
107			hash_link *
108			hash_lookup(htbl, k)
109			hash_table *htbl;
110			const void *k;
111			{
112			int c;
113			hash_link *w;
114
115			if (htbl == NULL \|\| k == NULL)
116			return NULL;
117			c = (htbl->hash) (k, (int)htbl->size);
118			for (w = htbl->bucket[c]; w != NULL; w = w->next)
119			if (htbl->cmp(w->key, k) == 0)
120			return w;
121			return NULL;
122			}
123
124			/* hash_insert - Insert a item into hash table.
125			* Return 0 on success. Return -1 on failure.
126			*/
127			int
128			hash_insert(htbl, k, i)
129			hash_table *htbl;
130			const void *k;
131			void *i;
132			{
133			int c;
134			hash_link *n;
135
136			if (htbl == NULL \|\| k == NULL)
137			return -1;
138
139			if ((n = malloc(sizeof(hash_link))) == NULL) {
140			return -1;
141			}
142
143			c = (htbl->hash) (k, (int)htbl->size);
144
145			n->item = i;
146			n->key = k;
147			n->next = htbl->bucket[c];
148			htbl->bucket[c] = n;
149
150			return 0;
151			}
152
153			/* hash_delete - Remove a item from hash table.
154			* If memfree then free the item. Return 0 on success. Return -1
155			* on failure.
156			*/
157			int
158			hash_delete(htbl, k, memfree)
159			hash_table *htbl;
160			const void *k;
161			int memfree;
162			{
163			int i;
164			hash_link b, w;
165
166			if (htbl == NULL \|\| k == NULL)
167			return -1;
168
169			i = (htbl->hash) (k, (int)htbl->size);
170
171			for (w = htbl->bucket[i], b = NULL; w != NULL; w = w->next) {
172			if (htbl->cmp(w->key, k) == 0) {
173			if (b != NULL)
174			b->next = w->next;
175			else
176			htbl->bucket[i] = w->next;
177
178			if (htbl->bucket_cur == w)
179			htbl->bucket_cur = w->next;
180
181			if (w->item != NULL && memfree) {
182			free(w->item);
183			}
184			free(w);
185			return 0;
186			}
187			b = w;
188			}
189			return -1;
190			}
191
192			/*
193			* delete all items from this hash_table.
194			* If memfree != 0 then free items.
195			*/
196			void
197			hash_delete_all(htbl, memfree)
198			hash_table *htbl;
199			int memfree;
200			{
201			int i;
202			hash_link w, hl;
203
204			for (i = 0; i < htbl->size; i++) {
205			hl = htbl->bucket[i];
206			htbl->bucket[i] = NULL;
207			while (hl != NULL) {
208			w = hl;
209			hl = hl->next;
210			if (memfree && w->item != NULL)
211			free(w->item);
212			free(w);
213			}
214			}
215			}
216
217			/* hash_free - Free hash table and all buckets.
218			*/
219			void
220			hash_free(htbl)
221			hash_table *htbl;
222			{
223			if (htbl != NULL) {
224			free(htbl->bucket);
225			free(htbl);
226			}
227			}