2 * Copyright (c) 2015 EfficiOS Inc. and Linux Foundation
3 * Copyright (c) 2015 Philippe Proulx <pproulx@efficios.com>
5 * Permission is hereby granted, free of charge, to any person obtaining a copy
6 * of this software and associated documentation files (the "Software"), to deal
7 * in the Software without restriction, including without limitation the rights
8 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9 * copies of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
24 #define BT_LOG_TAG "LIB/ATTRS"
25 #include "lib/logging.h"
27 #include "common/macros.h"
28 #include <babeltrace2/value.h>
29 #include "lib/assert-pre.h"
30 #include "lib/object.h"
31 #include <babeltrace2/value-const.h>
32 #include "lib/value.h"
33 #include "attributes.h"
35 #include "compat/string.h"
36 #include "common/assert.h"
38 #define BT_ATTR_NAME_INDEX 0
39 #define BT_ATTR_VALUE_INDEX 1
42 struct bt_value
*bt_attributes_create(void)
44 struct bt_value
*attr_obj
;
47 * Attributes: array value object of array value objects, each one
48 * containing two entries: a string value object (attributes
49 * field name), and a value object (attributes field value).
51 * Example (JSON representation):
54 * ["hostname", "eeppdesk"],
55 * ["sysname", "Linux"],
56 * ["tracer_major", 2],
60 BT_LOGD_STR("Creating attributes object.");
61 attr_obj
= bt_value_array_create();
63 BT_LIB_LOGE_APPEND_CAUSE("Failed to create array value.");
65 BT_LOGD("Created attributes object: addr=%p",
73 void bt_attributes_destroy(struct bt_value
*attr_obj
)
75 BT_LOGD("Destroying attributes object: addr=%p", attr_obj
);
76 BT_OBJECT_PUT_REF_AND_RESET(attr_obj
);
80 int64_t bt_attributes_get_count(const struct bt_value
*attr_obj
)
82 return bt_value_array_get_size(attr_obj
);
86 const char *bt_attributes_get_field_name(const struct bt_value
*attr_obj
,
89 const char *ret
= NULL
;
90 const struct bt_value
*attr_field_obj
= NULL
;
91 const struct bt_value
*attr_field_name_obj
= NULL
;
94 BT_ASSERT(index
< bt_value_array_get_size(attr_obj
));
95 attr_field_obj
= bt_value_array_borrow_element_by_index_const(
97 if (!attr_field_obj
) {
98 BT_LIB_LOGE_APPEND_CAUSE(
99 "Cannot borrow attributes object's array value's element by index: "
100 "%![value-]+v, index=%" PRIu64
, attr_obj
, index
);
104 attr_field_name_obj
=
105 bt_value_array_borrow_element_by_index_const(attr_field_obj
,
107 if (!attr_field_name_obj
) {
108 BT_LIB_LOGE_APPEND_CAUSE(
109 "Cannot get attribute array value's element by index: "
110 "%![value-]+v, index=%" PRIu64
, attr_field_obj
,
111 (uint64_t) BT_ATTR_NAME_INDEX
);
115 ret
= bt_value_string_get(attr_field_name_obj
);
122 struct bt_value
*bt_attributes_borrow_field_value(
123 struct bt_value
*attr_obj
, uint64_t index
)
125 struct bt_value
*value_obj
= NULL
;
126 struct bt_value
*attr_field_obj
= NULL
;
129 BT_ASSERT(index
< bt_value_array_get_size(attr_obj
));
131 bt_value_array_borrow_element_by_index(attr_obj
, index
);
132 if (!attr_field_obj
) {
133 BT_LIB_LOGE_APPEND_CAUSE(
134 "Cannot get attributes object's array value's element by index: "
135 "%![value-]+v, index=%" PRIu64
, attr_obj
, index
);
139 value_obj
= bt_value_array_borrow_element_by_index(
140 attr_field_obj
, BT_ATTR_VALUE_INDEX
);
142 BT_LIB_LOGE_APPEND_CAUSE(
143 "Cannot get attribute array value's element by index: "
144 "%![value-]+v, index=%" PRIu64
, attr_field_obj
,
145 (uint64_t) BT_ATTR_VALUE_INDEX
);
153 struct bt_value
*bt_attributes_borrow_field_by_name(
154 struct bt_value
*attr_obj
, const char *name
)
158 struct bt_value
*value_obj
= NULL
;
159 struct bt_value
*attr_field_name_obj
= NULL
;
161 attr_size
= bt_value_array_get_size(attr_obj
);
163 BT_LIB_LOGE_APPEND_CAUSE(
164 "Cannot get array value's size: %![value-]+v",
169 for (i
= 0; i
< attr_size
; ++i
) {
170 const char *field_name
;
172 value_obj
= bt_value_array_borrow_element_by_index(
175 BT_LIB_LOGE_APPEND_CAUSE(
176 "Cannot get attributes object's array value's element by index: "
177 "%![value-]+v, index=%" PRIu64
, attr_obj
, i
);
181 attr_field_name_obj
=
182 bt_value_array_borrow_element_by_index(
183 value_obj
, BT_ATTR_NAME_INDEX
);
184 if (!attr_field_name_obj
) {
185 BT_LIB_LOGE_APPEND_CAUSE(
186 "Cannot get attribute array value's element by index: "
187 "%![value-]+v, index=%" PRIu64
,
188 value_obj
, (int64_t) BT_ATTR_NAME_INDEX
);
192 field_name
= bt_value_string_get(attr_field_name_obj
);
194 if (!strcmp(field_name
, name
)) {
209 int bt_attributes_set_field_value(struct bt_value
*attr_obj
,
210 const char *name
, struct bt_value
*value_obj
)
213 struct bt_value
*attr_field_obj
= NULL
;
217 BT_ASSERT(value_obj
);
218 attr_field_obj
= bt_attributes_borrow_field_by_name(attr_obj
, name
);
219 if (attr_field_obj
) {
220 ret
= bt_value_array_set_element_by_index(
221 attr_field_obj
, BT_ATTR_VALUE_INDEX
,
223 attr_field_obj
= NULL
;
227 attr_field_obj
= bt_value_array_create();
228 if (!attr_field_obj
) {
229 BT_LIB_LOGE_APPEND_CAUSE("Failed to create empty array value.");
234 ret
= bt_value_array_append_string_element(attr_field_obj
,
236 ret
|= bt_value_array_append_element(attr_field_obj
,
239 BT_LIB_LOGE_APPEND_CAUSE(
240 "Cannot append elements to array value: %!+v",
245 ret
= bt_value_array_append_element(attr_obj
,
248 BT_LIB_LOGE_APPEND_CAUSE(
249 "Cannot append element to array value: "
250 "%![array-value-]+v, %![element-value-]+v",
251 attr_obj
, attr_field_obj
);
255 bt_object_put_ref(attr_field_obj
);
260 struct bt_value
*bt_attributes_borrow_field_value_by_name(
261 struct bt_value
*attr_obj
, const char *name
)
263 struct bt_value
*value_obj
= NULL
;
264 struct bt_value
*attr_field_obj
= NULL
;
268 attr_field_obj
= bt_attributes_borrow_field_by_name(attr_obj
, name
);
269 if (!attr_field_obj
) {
270 BT_LOGD("Cannot find attributes object's field by name: "
271 "value-addr=%p, name=\"%s\"", attr_obj
, name
);
275 value_obj
= bt_value_array_borrow_element_by_index(
276 attr_field_obj
, BT_ATTR_VALUE_INDEX
);
278 BT_LIB_LOGE_APPEND_CAUSE(
279 "Cannot get attribute array value's element by index: "
280 "%![value-]+v, index=%" PRIu64
, attr_field_obj
,
281 (uint64_t) BT_ATTR_VALUE_INDEX
);
289 int bt_attributes_freeze(const struct bt_value
*attr_obj
)
296 BT_LOGD("Freezing attributes object: value-addr=%p", attr_obj
);
297 count
= bt_value_array_get_size(attr_obj
);
298 BT_ASSERT(count
>= 0);
301 * We do not freeze the array value object itself here, since
302 * internal stuff could need to modify/add attributes. Each
303 * attribute is frozen one by one.
305 for (i
= 0; i
< count
; ++i
) {
306 struct bt_value
*obj
= NULL
;
308 obj
= bt_attributes_borrow_field_value(
309 (void *) attr_obj
, i
);
311 BT_LIB_LOGE_APPEND_CAUSE(
312 "Cannot get attributes object's field value by index: "
313 "%![value-]+v, index=%" PRIu64
,
319 bt_value_freeze(obj
);
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