libsyncml 0.5.4

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data_sync_common.c
1 /*
2 * libsyncml - A syncml protocol implementation
3 * Copyright (C) 2008 Michael Bell <michael.bell@opensync.org>
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 *
19 */
20
21 #include "data_sync_common.h"
22 #include "libsyncml/syncml_internals.h"
23 #include "libsyncml/sml_error_internals.h"
24
25 #include "data_sync_devinf.h"
26
27 SmlBool smlDataSyncIsTimestamp(const char *anchor, SmlBool timestampDefault)
28 {
29 smlTrace(TRACE_ENTRY, "%s(%s, %d)", __func__, VA_STRING(anchor), timestampDefault);
30 if (anchor == NULL || strlen(anchor) < 1)
31 {
32 /* there is no anchor, so the default is sent */
33 smlTrace(TRACE_EXIT, "%s - default", __func__);
34 return timestampDefault;
35 } else {
36 /* last is set in the anchor database */
37 if (strstr(anchor, "Z")) {
38 /* anchor is a timestamp */
39 smlTrace(TRACE_EXIT, "%s - TRUE", __func__);
40 return TRUE;
41 } else {
42 /* last is a number */
43 smlTrace(TRACE_EXIT, "%s - FALSE", __func__);
44 return FALSE;
45 }
46 }
47 }
48
49 char *smlDataSyncGetNextAnchor(
50 SmlDataSyncDatastore *datastore,
51 const char *last,
52 SmlError **error)
53 {
54 smlTrace(TRACE_ENTRY, "%s(%s)", __func__, VA_STRING(last));
55 CHECK_ERROR_REF
56 SmlBool use_timestamp = TRUE;
57 char *next = NULL;
58
59 use_timestamp = smlDataSyncIsTimestamp(last,
60 datastore->dsObject->useTimestampAnchor);
61 smlTrace(TRACE_INTERNAL, "%s: use timestamp is %d", __func__, use_timestamp);
62
63 if (use_timestamp)
64 {
65 /* It is necessary to be sure that the remote device supports UTC. */
66 smlTrace(TRACE_INTERNAL,
67 "%s: session %p, localtime %d, remoteDevInf %p",
68 __func__,
69 datastore->dsObject->session,
70 datastore->dsObject->onlyLocaltime,
71 datastore->dsObject->remoteDevInf);
72 if (datastore->dsObject->session &&
73 !datastore->dsObject->onlyLocaltime &&
74 !datastore->dsObject->remoteDevInf &&
75 !smlDataSyncManageDevInf(datastore->dsObject, FALSE, error))
76 {
77 goto error;
78 }
79 next = smlTryMalloc0(sizeof(char)*17, error);
80 if (!next)
81 goto error;
82 time_t htime = time(NULL);
83 if (datastore->dsObject->onlyLocaltime) {
84 smlTrace(TRACE_INTERNAL, "%s: use localtime", __func__);
85 strftime(next, 17, "%Y%m%dT%H%M%SZ", localtime(&htime));
86 } else {
87 smlTrace(TRACE_INTERNAL, "%s: use UTC", __func__);
88 strftime(next, 17, "%Y%m%dT%H%M%SZ", gmtime(&htime));
89 }
90 } else {
91 if (last == NULL)
92 {
93 next = g_strdup("1");
94 } else {
95 unsigned long count = strtoul(last, NULL, 10);
96 count++;
97 next = g_strdup_printf("%lu", count);
98 }
99 }
100 smlTrace(TRACE_EXIT, "%s(%s)", __func__, VA_STRING(next));
101 return next;
102 error:
103 smlTrace(TRACE_EXIT_ERROR, "%s - %s", __func__, smlErrorPrint(error));
104 return NULL;
105 }