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