File: uuid_dce.c

package info (click to toggle)
ossp-uuid 1.6.2-1.5
  • links: PTS, VCS
  • area: main
  • in suites: buster, jessie, jessie-kfreebsd, sid, stretch
  • size: 2,376 kB
  • ctags: 770
  • sloc: sh: 12,148; ansic: 4,778; makefile: 377; perl: 357; cpp: 256; php: 95; xml: 35
file content (294 lines) | stat: -rw-r--r-- 7,790 bytes parent folder | download | duplicates (3)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
/*
**  OSSP uuid - Universally Unique Identifier
**  Copyright (c) 2004-2008 Ralf S. Engelschall <rse@engelschall.com>
**  Copyright (c) 2004-2008 The OSSP Project <http://www.ossp.org/>
**
**  This file is part of OSSP uuid, a library for the generation
**  of UUIDs which can found at http://www.ossp.org/pkg/lib/uuid/
**
**  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.
**
**  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 AUTHORS AND COPYRIGHT HOLDERS AND THEIR
**  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.
**
**  uuid_dce.c: DCE 1.1 compatibility API implementation
*/

/* include DCE 1.1 API */
#define uuid_t uuid_dce_t
#include "uuid_dce.h"
#undef uuid_t
#undef uuid_create
#undef uuid_create_nil
#undef uuid_is_nil
#undef uuid_compare
#undef uuid_equal
#undef uuid_from_string
#undef uuid_to_string
#undef uuid_hash

/* include regular API */
#include "uuid.h"

/* helper macro */
#define LEAVE /*lint -save -e801*/ goto leave /*lint -restore*/

/* create a UUID (v1 only) */
void uuid_dce_create(uuid_dce_t *uuid_dce, int *status)
{
    uuid_t *uuid;
    size_t len;
    void *vp;

    /* initialize status */
    if (status != NULL)
        *status = uuid_s_error;

    /* sanity check argument(s) */
    if (uuid_dce == NULL)
        return;

    /* create UUID and export as binary representation */
    if (uuid_create(&uuid) != UUID_RC_OK)
        return;
    if (uuid_make(uuid, UUID_MAKE_V1) != UUID_RC_OK) {
        uuid_destroy(uuid);
        return;
    }
    vp  = uuid_dce;
    len = UUID_LEN_BIN;
    if (uuid_export(uuid, UUID_FMT_BIN, &vp, &len) != UUID_RC_OK) {
        uuid_destroy(uuid);
        return;
    }
    uuid_destroy(uuid);

    /* return successfully */
    if (status != NULL)
        *status = uuid_s_ok;
    return;
}

/* create a Nil UUID */
void uuid_dce_create_nil(uuid_dce_t *uuid_dce, int *status)
{
    /* initialize status */
    if (status != NULL)
        *status = uuid_s_error;

    /* sanity check argument(s) */
    if (uuid_dce == NULL)
        return;

    /* short-circuit implementation, because Nil UUID is trivial to
       create, so no need to use regular OSSP uuid API */
    memset(uuid_dce, 0, UUID_LEN_BIN);

    /* return successfully */
    if (status != NULL)
        *status = uuid_s_ok;
    return;
}

/* check whether it is Nil UUID */
int uuid_dce_is_nil(uuid_dce_t *uuid_dce, int *status)
{
    int i;
    int result;
    unsigned char *ucp;

    /* initialize status */
    if (status != NULL)
        *status = uuid_s_error;

    /* sanity check argument(s) */
    if (uuid_dce == NULL)
        return 0;

    /* short-circuit implementation, because Nil UUID is trivial to
       check, so no need to use regular OSSP uuid API */
    result = 1;
    ucp = (unsigned char *)uuid_dce;
    for (i = 0; i < UUID_LEN_BIN; i++) {
        if (ucp[i] != '\0') {
            result = 0;
            break;
        }
    }

    /* return successfully with result */
    if (status != NULL)
        *status = uuid_s_ok;
    return result;
}

/* compare two UUIDs */
int uuid_dce_compare(uuid_dce_t *uuid_dce1, uuid_dce_t *uuid_dce2, int *status)
{
    uuid_t *uuid1 = NULL;
    uuid_t *uuid2 = NULL;
    int result = 0;

    /* initialize status */
    if (status != NULL)
        *status = uuid_s_error;

    /* sanity check argument(s) */
    if (uuid_dce1 == NULL || uuid_dce2 == NULL)
        return 0;

    /* import both UUID binary representations and compare them */
    if (uuid_create(&uuid1) != UUID_RC_OK)
        LEAVE;
    if (uuid_create(&uuid2) != UUID_RC_OK)
        LEAVE;
    if (uuid_import(uuid1, UUID_FMT_BIN, uuid_dce1, UUID_LEN_BIN) != UUID_RC_OK)
        LEAVE;
    if (uuid_import(uuid2, UUID_FMT_BIN, uuid_dce2, UUID_LEN_BIN) != UUID_RC_OK)
        LEAVE;
    if (uuid_compare(uuid1, uuid2, &result) != UUID_RC_OK)
        LEAVE;

    /* indicate successful operation */
    if (status != NULL)
        *status = uuid_s_ok;

    /* cleanup and return */
    leave:
    if (uuid1 != NULL)
        uuid_destroy(uuid1);
    if (uuid2 != NULL)
        uuid_destroy(uuid2);
    return result;
}

/* compare two UUIDs (equality only) */
int uuid_dce_equal(uuid_dce_t *uuid_dce1, uuid_dce_t *uuid_dce2, int *status)
{
    /* initialize status */
    if (status != NULL)
        *status = uuid_s_error;

    /* sanity check argument(s) */
    if (uuid_dce1 == NULL || uuid_dce2 == NULL)
        return 0;

    /* pass through to generic compare function */
    return (uuid_dce_compare(uuid_dce1, uuid_dce2, status) == 0 ? 1 : 0);
}

/* import UUID from string representation */
void uuid_dce_from_string(const char *str, uuid_dce_t *uuid_dce, int *status)
{
    uuid_t *uuid = NULL;
    size_t len;
    void *vp;

    /* initialize status */
    if (status != NULL)
        *status = uuid_s_error;

    /* sanity check argument(s) */
    if (str == NULL || uuid_dce == NULL)
        return;

    /* import string representation and export binary representation */
    if (uuid_create(&uuid) != UUID_RC_OK)
        LEAVE;
    if (uuid_import(uuid, UUID_FMT_STR, str, UUID_LEN_STR) != UUID_RC_OK)
        LEAVE;
    vp  = uuid_dce;
    len = UUID_LEN_BIN;
    if (uuid_export(uuid, UUID_FMT_BIN, &vp, &len) != UUID_RC_OK)
        LEAVE;

    /* indicate successful operation */
    if (status != NULL)
        *status = uuid_s_ok;

    /* cleanup and return */
    leave:
    if (uuid != NULL)
        uuid_destroy(uuid);
    return;
}

/* export UUID to string representation */
void uuid_dce_to_string(uuid_dce_t *uuid_dce, char **str, int *status)
{
    uuid_t *uuid = NULL;
    size_t len;
    void *vp;

    /* initialize status */
    if (status != NULL)
        *status = uuid_s_error;

    /* sanity check argument(s) */
    if (str == NULL || uuid_dce == NULL)
        return;

    /* import binary representation and export string representation */
    if (uuid_create(&uuid) != UUID_RC_OK)
        LEAVE;
    if (uuid_import(uuid, UUID_FMT_BIN, uuid_dce, UUID_LEN_BIN) != UUID_RC_OK)
        LEAVE;
    vp  = str;
    len = UUID_LEN_STR;
    if (uuid_export(uuid, UUID_FMT_STR, &vp, &len) != UUID_RC_OK)
        LEAVE;

    /* indicate successful operation */
    if (status != NULL)
        *status = uuid_s_ok;

    /* cleanup and return */
    leave:
    if (uuid != NULL)
        uuid_destroy(uuid);
    return;
}

/* export UUID into hash value */
unsigned int uuid_dce_hash(uuid_dce_t *uuid_dce, int *status)
{
    int i;
    unsigned char *ucp;
    unsigned int hash;

    /* initialize status */
    if (status != NULL)
        *status = uuid_s_error;

    /* sanity check argument(s) */
    if (uuid_dce == NULL)
        return 0;

    /* generate a hash value
       (DCE 1.1 actually requires 16-bit only) */
    hash = 0;
    ucp = (unsigned char *)uuid_dce;
    for (i = UUID_LEN_BIN-1; i >= 0; i--) {
        hash <<= 8;
        hash |= ucp[i];
    }

    /* return successfully */
    if (status != NULL)
        *status = uuid_s_ok;
    return hash;
}