1 /* $NetBSD: data.c,v 1.2 2017/01/28 21:31:45 christos Exp $ */
2
3 /*
4 * Copyright (c) 2011 Kungliga Tekniska Högskolan
5 * (Royal Institute of Technology, Stockholm, Sweden).
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * 3. Neither the name of the Institute nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36 #include "baselocl.h"
37 #include <string.h>
38
39 static void
data_dealloc(void * ptr)40 data_dealloc(void *ptr)
41 {
42 heim_data_t d = ptr;
43 heim_octet_string *os = (heim_octet_string *)d;
44 heim_data_free_f_t *deallocp;
45 heim_data_free_f_t dealloc;
46
47 if (os->data == NULL)
48 return;
49
50 /* Possible string ref */
51 deallocp = _heim_get_isaextra(os, 0);
52 dealloc = *deallocp;
53 if (dealloc != NULL)
54 dealloc(os->data);
55 }
56
57 static int
data_cmp(void * a,void * b)58 data_cmp(void *a, void *b)
59 {
60 heim_octet_string *osa = a, *osb = b;
61 if (osa->length != osb->length)
62 return osa->length - osb->length;
63 return memcmp(osa->data, osb->data, osa->length);
64 }
65
66 static unsigned long
data_hash(void * ptr)67 data_hash(void *ptr)
68 {
69 heim_octet_string *os = ptr;
70 const unsigned char *s = os->data;
71
72 if (os->length < 4)
73 return os->length;
74 return s[0] | (s[1] << 8) |
75 (s[os->length - 2] << 16) | (s[os->length - 1] << 24);
76 }
77
78 struct heim_type_data _heim_data_object = {
79 HEIM_TID_DATA,
80 "data-object",
81 NULL,
82 data_dealloc,
83 NULL,
84 data_cmp,
85 data_hash,
86 NULL
87 };
88
89 /**
90 * Create a data object
91 *
92 * @param string the string to create, must be an utf8 string
93 *
94 * @return string object
95 */
96
97 heim_data_t
heim_data_create(const void * data,size_t length)98 heim_data_create(const void *data, size_t length)
99 {
100 heim_octet_string *os;
101
102 os = _heim_alloc_object(&_heim_data_object, sizeof(*os) + length);
103 if (os) {
104 os->data = (uint8_t *)os + sizeof(*os);
105 os->length = length;
106 memcpy(os->data, data, length);
107 }
108 return (heim_data_t)os;
109 }
110
111 heim_data_t
heim_data_ref_create(const void * data,size_t length,heim_data_free_f_t dealloc)112 heim_data_ref_create(const void *data, size_t length,
113 heim_data_free_f_t dealloc)
114 {
115 heim_octet_string *os;
116 heim_data_free_f_t *deallocp;
117
118 os = _heim_alloc_object(&_heim_data_object, sizeof(*os) + length);
119 if (os) {
120 os->data = (void *)data;
121 os->length = length;
122 deallocp = _heim_get_isaextra(os, 0);
123 *deallocp = dealloc;
124 }
125 return (heim_data_t)os;
126 }
127
128
129 /**
130 * Return the type ID of data objects
131 *
132 * @return type id of data objects
133 */
134
135 heim_tid_t
heim_data_get_type_id(void)136 heim_data_get_type_id(void)
137 {
138 return HEIM_TID_DATA;
139 }
140
141 /**
142 * Get the data value of the content.
143 *
144 * @param data the data object to get the value from
145 *
146 * @return a heim_octet_string
147 */
148
149 const heim_octet_string *
heim_data_get_data(heim_data_t data)150 heim_data_get_data(heim_data_t data)
151 {
152 /* Note that this works for data and data_ref objects */
153 return (const heim_octet_string *)data;
154 }
155
156 const void *
heim_data_get_ptr(heim_data_t data)157 heim_data_get_ptr(heim_data_t data)
158 {
159 /* Note that this works for data and data_ref objects */
160 return ((const heim_octet_string *)data)->data;
161 }
162
heim_data_get_length(heim_data_t data)163 size_t heim_data_get_length(heim_data_t data)
164 {
165 /* Note that this works for data and data_ref objects */
166 return ((const heim_octet_string *)data)->length;
167 }
168