Commit | Line | Data |
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44e0a4f5 | 1 | /* |
0235b0db MJ |
2 | * SPDX-License-Identifier: MIT |
3 | * | |
44e0a4f5 JG |
4 | * Copyright (c) 2015 EfficiOS Inc. and Linux Foundation |
5 | * Copyright (c) 2015 Philippe Proulx <pproulx@efficios.com> | |
44e0a4f5 JG |
6 | */ |
7 | ||
350ad6c1 | 8 | #define BT_LOG_TAG "LIB/ATTRS" |
c2d9d9cf | 9 | #include "lib/logging.h" |
0f5e83e5 | 10 | |
3fadfbc0 | 11 | #include <babeltrace2/value.h> |
578e048b | 12 | #include "lib/object.h" |
43c59509 | 13 | #include <babeltrace2/value.h> |
578e048b MJ |
14 | #include "lib/value.h" |
15 | #include "attributes.h" | |
561ad8c1 | 16 | #include <inttypes.h> |
578e048b MJ |
17 | #include "compat/string.h" |
18 | #include "common/assert.h" | |
44e0a4f5 | 19 | |
50842bdc PP |
20 | #define BT_ATTR_NAME_INDEX 0 |
21 | #define BT_ATTR_VALUE_INDEX 1 | |
44e0a4f5 | 22 | |
05e21286 | 23 | struct bt_value *bt_attributes_create(void) |
44e0a4f5 | 24 | { |
05e21286 | 25 | struct bt_value *attr_obj; |
561ad8c1 | 26 | |
44e0a4f5 | 27 | /* |
dac5c838 PP |
28 | * Attributes: array value object of array value objects, each one |
29 | * containing two entries: a string value object (attributes | |
30 | * field name), and a value object (attributes field value). | |
44e0a4f5 JG |
31 | * |
32 | * Example (JSON representation): | |
33 | * | |
34 | * [ | |
35 | * ["hostname", "eeppdesk"], | |
36 | * ["sysname", "Linux"], | |
37 | * ["tracer_major", 2], | |
38 | * ["tracer_minor", 5] | |
39 | * ] | |
40 | */ | |
561ad8c1 | 41 | BT_LOGD_STR("Creating attributes object."); |
05e21286 | 42 | attr_obj = bt_value_array_create(); |
561ad8c1 | 43 | if (!attr_obj) { |
870631a2 | 44 | BT_LIB_LOGE_APPEND_CAUSE("Failed to create array value."); |
561ad8c1 PP |
45 | } else { |
46 | BT_LOGD("Created attributes object: addr=%p", | |
47 | attr_obj); | |
48 | } | |
49 | ||
50 | return attr_obj; | |
44e0a4f5 JG |
51 | } |
52 | ||
05e21286 | 53 | void bt_attributes_destroy(struct bt_value *attr_obj) |
44e0a4f5 | 54 | { |
561ad8c1 | 55 | BT_LOGD("Destroying attributes object: addr=%p", attr_obj); |
238b7404 | 56 | BT_OBJECT_PUT_REF_AND_RESET(attr_obj); |
44e0a4f5 JG |
57 | } |
58 | ||
99b4b64b | 59 | uint64_t bt_attributes_get_count(const struct bt_value *attr_obj) |
44e0a4f5 | 60 | { |
393729a6 | 61 | return bt_value_array_get_length(attr_obj); |
44e0a4f5 JG |
62 | } |
63 | ||
05e21286 | 64 | const char *bt_attributes_get_field_name(const struct bt_value *attr_obj, |
dcf0cc71 | 65 | uint64_t index) |
44e0a4f5 | 66 | { |
05e21286 PP |
67 | const struct bt_value *attr_field_obj = NULL; |
68 | const struct bt_value *attr_field_name_obj = NULL; | |
44e0a4f5 | 69 | |
98b15851 PP |
70 | BT_ASSERT_DBG(attr_obj); |
71 | BT_ASSERT_DBG(index < bt_value_array_get_length(attr_obj)); | |
05e21286 | 72 | attr_field_obj = bt_value_array_borrow_element_by_index_const( |
da91b29a | 73 | attr_obj, index); |
44e0a4f5 | 74 | |
da91b29a | 75 | attr_field_name_obj = |
05e21286 | 76 | bt_value_array_borrow_element_by_index_const(attr_field_obj, |
da91b29a | 77 | BT_ATTR_NAME_INDEX); |
44e0a4f5 | 78 | |
33f4e1fd | 79 | return bt_value_string_get(attr_field_name_obj); |
44e0a4f5 JG |
80 | } |
81 | ||
05e21286 PP |
82 | struct bt_value *bt_attributes_borrow_field_value( |
83 | struct bt_value *attr_obj, uint64_t index) | |
44e0a4f5 | 84 | { |
05e21286 | 85 | struct bt_value *attr_field_obj = NULL; |
44e0a4f5 | 86 | |
98b15851 PP |
87 | BT_ASSERT_DBG(attr_obj); |
88 | BT_ASSERT_DBG(index < bt_value_array_get_length(attr_obj)); | |
33f4e1fd | 89 | |
da91b29a | 90 | attr_field_obj = |
05e21286 | 91 | bt_value_array_borrow_element_by_index(attr_obj, index); |
44e0a4f5 | 92 | |
33f4e1fd FD |
93 | return bt_value_array_borrow_element_by_index( attr_field_obj, |
94 | BT_ATTR_VALUE_INDEX); | |
44e0a4f5 JG |
95 | } |
96 | ||
97 | static | |
05e21286 PP |
98 | struct bt_value *bt_attributes_borrow_field_by_name( |
99 | struct bt_value *attr_obj, const char *name) | |
44e0a4f5 | 100 | { |
f80e9ec1 | 101 | uint64_t i, attr_size; |
05e21286 PP |
102 | struct bt_value *value_obj = NULL; |
103 | struct bt_value *attr_field_name_obj = NULL; | |
44e0a4f5 | 104 | |
393729a6 | 105 | attr_size = bt_value_array_get_length(attr_obj); |
44e0a4f5 | 106 | for (i = 0; i < attr_size; ++i) { |
44e0a4f5 JG |
107 | const char *field_name; |
108 | ||
05e21286 | 109 | value_obj = bt_value_array_borrow_element_by_index( |
da91b29a | 110 | attr_obj, i); |
44e0a4f5 | 111 | |
da91b29a | 112 | attr_field_name_obj = |
05e21286 | 113 | bt_value_array_borrow_element_by_index( |
da91b29a | 114 | value_obj, BT_ATTR_NAME_INDEX); |
44e0a4f5 | 115 | |
05e21286 | 116 | field_name = bt_value_string_get(attr_field_name_obj); |
44e0a4f5 | 117 | |
2242b43d | 118 | if (strcmp(field_name, name) == 0) { |
44e0a4f5 JG |
119 | break; |
120 | } | |
121 | ||
094ff7c0 | 122 | value_obj = NULL; |
44e0a4f5 JG |
123 | } |
124 | ||
125 | return value_obj; | |
44e0a4f5 JG |
126 | } |
127 | ||
05e21286 PP |
128 | int bt_attributes_set_field_value(struct bt_value *attr_obj, |
129 | const char *name, struct bt_value *value_obj) | |
44e0a4f5 JG |
130 | { |
131 | int ret = 0; | |
05e21286 | 132 | struct bt_value *attr_field_obj = NULL; |
44e0a4f5 | 133 | |
870631a2 PP |
134 | BT_ASSERT(attr_obj); |
135 | BT_ASSERT(name); | |
136 | BT_ASSERT(value_obj); | |
094ff7c0 | 137 | attr_field_obj = bt_attributes_borrow_field_by_name(attr_obj, name); |
44e0a4f5 | 138 | if (attr_field_obj) { |
05e21286 | 139 | ret = bt_value_array_set_element_by_index( |
da91b29a | 140 | attr_field_obj, BT_ATTR_VALUE_INDEX, |
05e21286 | 141 | value_obj); |
094ff7c0 | 142 | attr_field_obj = NULL; |
44e0a4f5 JG |
143 | goto end; |
144 | } | |
145 | ||
05e21286 | 146 | attr_field_obj = bt_value_array_create(); |
44e0a4f5 | 147 | if (!attr_field_obj) { |
870631a2 | 148 | BT_LIB_LOGE_APPEND_CAUSE("Failed to create empty array value."); |
44e0a4f5 JG |
149 | ret = -1; |
150 | goto end; | |
151 | } | |
152 | ||
05e21286 | 153 | ret = bt_value_array_append_string_element(attr_field_obj, |
da91b29a | 154 | name); |
05e21286 PP |
155 | ret |= bt_value_array_append_element(attr_field_obj, |
156 | value_obj); | |
44e0a4f5 | 157 | if (ret) { |
870631a2 PP |
158 | BT_LIB_LOGE_APPEND_CAUSE( |
159 | "Cannot append elements to array value: %!+v", | |
561ad8c1 | 160 | attr_field_obj); |
44e0a4f5 JG |
161 | goto end; |
162 | } | |
163 | ||
05e21286 PP |
164 | ret = bt_value_array_append_element(attr_obj, |
165 | attr_field_obj); | |
561ad8c1 | 166 | if (ret) { |
870631a2 PP |
167 | BT_LIB_LOGE_APPEND_CAUSE( |
168 | "Cannot append element to array value: " | |
169 | "%![array-value-]+v, %![element-value-]+v", | |
561ad8c1 PP |
170 | attr_obj, attr_field_obj); |
171 | } | |
44e0a4f5 JG |
172 | |
173 | end: | |
65300d60 | 174 | bt_object_put_ref(attr_field_obj); |
44e0a4f5 JG |
175 | return ret; |
176 | } | |
177 | ||
05e21286 PP |
178 | struct bt_value *bt_attributes_borrow_field_value_by_name( |
179 | struct bt_value *attr_obj, const char *name) | |
44e0a4f5 | 180 | { |
05e21286 PP |
181 | struct bt_value *value_obj = NULL; |
182 | struct bt_value *attr_field_obj = NULL; | |
44e0a4f5 | 183 | |
98b15851 PP |
184 | BT_ASSERT_DBG(attr_obj); |
185 | BT_ASSERT_DBG(name); | |
094ff7c0 | 186 | attr_field_obj = bt_attributes_borrow_field_by_name(attr_obj, name); |
44e0a4f5 | 187 | if (!attr_field_obj) { |
561ad8c1 PP |
188 | BT_LOGD("Cannot find attributes object's field by name: " |
189 | "value-addr=%p, name=\"%s\"", attr_obj, name); | |
44e0a4f5 JG |
190 | goto end; |
191 | } | |
192 | ||
05e21286 | 193 | value_obj = bt_value_array_borrow_element_by_index( |
da91b29a | 194 | attr_field_obj, BT_ATTR_VALUE_INDEX); |
44e0a4f5 JG |
195 | |
196 | end: | |
44e0a4f5 JG |
197 | return value_obj; |
198 | } | |
199 | ||
05e21286 | 200 | int bt_attributes_freeze(const struct bt_value *attr_obj) |
44e0a4f5 | 201 | { |
f80e9ec1 | 202 | uint64_t i, count; |
44e0a4f5 JG |
203 | int ret = 0; |
204 | ||
870631a2 | 205 | BT_ASSERT(attr_obj); |
561ad8c1 | 206 | BT_LOGD("Freezing attributes object: value-addr=%p", attr_obj); |
f80e9ec1 | 207 | |
393729a6 | 208 | count = bt_value_array_get_length(attr_obj); |
44e0a4f5 JG |
209 | |
210 | /* | |
dac5c838 PP |
211 | * We do not freeze the array value object itself here, since |
212 | * internal stuff could need to modify/add attributes. Each | |
213 | * attribute is frozen one by one. | |
44e0a4f5 JG |
214 | */ |
215 | for (i = 0; i < count; ++i) { | |
05e21286 | 216 | struct bt_value *obj = NULL; |
44e0a4f5 | 217 | |
05e21286 PP |
218 | obj = bt_attributes_borrow_field_value( |
219 | (void *) attr_obj, i); | |
44e0a4f5 | 220 | if (!obj) { |
870631a2 PP |
221 | BT_LIB_LOGE_APPEND_CAUSE( |
222 | "Cannot get attributes object's field value by index: " | |
223 | "%![value-]+v, index=%" PRIu64, | |
561ad8c1 | 224 | attr_obj, i); |
44e0a4f5 JG |
225 | ret = -1; |
226 | goto end; | |
227 | } | |
228 | ||
05e21286 | 229 | bt_value_freeze(obj); |
44e0a4f5 JG |
230 | } |
231 | ||
232 | end: | |
44e0a4f5 JG |
233 | return ret; |
234 | } |