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44e0a4f5 JG |
1 | /* |
2 | * attributes.c | |
3 | * | |
4 | * Babeltrace CTF IR - Attributes | |
5 | * | |
6 | * Copyright (c) 2015 EfficiOS Inc. and Linux Foundation | |
7 | * Copyright (c) 2015 Philippe Proulx <pproulx@efficios.com> | |
8 | * | |
9 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
10 | * of this software and associated documentation files (the "Software"), to deal | |
11 | * in the Software without restriction, including without limitation the rights | |
12 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
13 | * copies of the Software, and to permit persons to whom the Software is | |
14 | * furnished to do so, subject to the following conditions: | |
15 | * | |
16 | * The above copyright notice and this permission notice shall be included in | |
17 | * all copies or substantial portions of the Software. | |
18 | * | |
19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
20 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
21 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
22 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
23 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
24 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
25 | * SOFTWARE. | |
26 | */ | |
27 | ||
28 | #include <babeltrace/babeltrace-internal.h> | |
29 | #include <babeltrace/objects.h> | |
30 | ||
31 | #define BT_CTF_ATTR_NAME_INDEX 0 | |
32 | #define BT_CTF_ATTR_VALUE_INDEX 1 | |
33 | ||
34 | BT_HIDDEN | |
35 | struct bt_object *bt_ctf_attributes_create(void) | |
36 | { | |
37 | /* | |
38 | * Attributes: array object of array objects, each one | |
39 | * containing two entries: a string object (attributes field | |
40 | * name), and an object (attributes field value). | |
41 | * | |
42 | * Example (JSON representation): | |
43 | * | |
44 | * [ | |
45 | * ["hostname", "eeppdesk"], | |
46 | * ["sysname", "Linux"], | |
47 | * ["tracer_major", 2], | |
48 | * ["tracer_minor", 5] | |
49 | * ] | |
50 | */ | |
51 | return bt_object_array_create(); | |
52 | } | |
53 | ||
54 | BT_HIDDEN | |
55 | void bt_ctf_attributes_destroy(struct bt_object *attr_obj) | |
56 | { | |
57 | bt_object_put(attr_obj); | |
58 | } | |
59 | ||
60 | BT_HIDDEN | |
61 | int bt_ctf_attributes_get_count(struct bt_object *attr_obj) | |
62 | { | |
63 | return bt_object_array_size(attr_obj); | |
64 | } | |
65 | ||
66 | BT_HIDDEN | |
67 | const char *bt_ctf_attributes_get_field_name(struct bt_object *attr_obj, | |
68 | int index) | |
69 | { | |
70 | int rc; | |
71 | const char *ret = NULL; | |
72 | struct bt_object *attr_field_obj = NULL; | |
73 | struct bt_object *attr_field_name_obj = NULL; | |
74 | ||
75 | if (!attr_obj || index < 0) { | |
76 | goto end; | |
77 | } | |
78 | ||
79 | attr_field_obj = bt_object_array_get(attr_obj, index); | |
80 | ||
81 | if (!attr_field_obj) { | |
82 | goto end; | |
83 | } | |
84 | ||
85 | attr_field_name_obj = bt_object_array_get(attr_field_obj, | |
86 | BT_CTF_ATTR_NAME_INDEX); | |
87 | ||
88 | if (!attr_field_name_obj) { | |
89 | goto end; | |
90 | } | |
91 | ||
92 | rc = bt_object_string_get(attr_field_name_obj, &ret); | |
93 | ||
94 | if (rc) { | |
95 | ret = NULL; | |
96 | } | |
97 | ||
98 | end: | |
99 | BT_OBJECT_PUT(attr_field_name_obj); | |
100 | BT_OBJECT_PUT(attr_field_obj); | |
101 | ||
102 | return ret; | |
103 | } | |
104 | ||
105 | BT_HIDDEN | |
106 | struct bt_object *bt_ctf_attributes_get_field_value(struct bt_object *attr_obj, | |
107 | int index) | |
108 | { | |
109 | struct bt_object *value_obj = NULL; | |
110 | struct bt_object *attr_field_obj = NULL; | |
111 | ||
112 | if (!attr_obj || index < 0) { | |
113 | goto end; | |
114 | } | |
115 | ||
116 | attr_field_obj = bt_object_array_get(attr_obj, index); | |
117 | ||
118 | if (!attr_field_obj) { | |
119 | goto end; | |
120 | } | |
121 | ||
122 | value_obj = bt_object_array_get(attr_field_obj, | |
123 | BT_CTF_ATTR_VALUE_INDEX); | |
124 | ||
125 | end: | |
126 | BT_OBJECT_PUT(attr_field_obj); | |
127 | ||
128 | return value_obj; | |
129 | } | |
130 | ||
131 | static | |
132 | struct bt_object *bt_ctf_attributes_get_field_by_name( | |
133 | struct bt_object *attr_obj, const char *name) | |
134 | { | |
135 | int i; | |
136 | int attr_size; | |
137 | struct bt_object *value_obj = NULL; | |
138 | struct bt_object *attr_field_name_obj = NULL; | |
139 | ||
140 | attr_size = bt_object_array_size(attr_obj); | |
141 | ||
142 | if (attr_size < 0) { | |
143 | goto error; | |
144 | } | |
145 | ||
146 | for (i = 0; i < attr_size; ++i) { | |
147 | int ret; | |
148 | const char *field_name; | |
149 | ||
150 | value_obj = bt_object_array_get(attr_obj, i); | |
151 | ||
152 | if (!value_obj) { | |
153 | goto error; | |
154 | } | |
155 | ||
156 | attr_field_name_obj = bt_object_array_get(value_obj, 0); | |
157 | ||
158 | if (!attr_field_name_obj) { | |
159 | goto error; | |
160 | } | |
161 | ||
162 | ret = bt_object_string_get(attr_field_name_obj, &field_name); | |
163 | if (ret) { | |
164 | goto error; | |
165 | } | |
166 | ||
167 | if (!strcmp(field_name, name)) { | |
168 | BT_OBJECT_PUT(attr_field_name_obj); | |
169 | break; | |
170 | } | |
171 | ||
172 | BT_OBJECT_PUT(attr_field_name_obj); | |
173 | BT_OBJECT_PUT(value_obj); | |
174 | } | |
175 | ||
176 | return value_obj; | |
177 | ||
178 | error: | |
179 | BT_OBJECT_PUT(attr_field_name_obj); | |
180 | BT_OBJECT_PUT(value_obj); | |
181 | ||
182 | return value_obj; | |
183 | } | |
184 | ||
185 | BT_HIDDEN | |
186 | int bt_ctf_attributes_set_field_value(struct bt_object *attr_obj, | |
187 | const char *name, struct bt_object *value_obj) | |
188 | { | |
189 | int ret = 0; | |
190 | struct bt_object *attr_field_obj = NULL; | |
191 | ||
192 | if (!attr_obj || !name || !value_obj) { | |
193 | ret = -1; | |
194 | goto end; | |
195 | } | |
196 | ||
197 | attr_field_obj = bt_ctf_attributes_get_field_by_name(attr_obj, name); | |
198 | ||
199 | if (attr_field_obj) { | |
200 | ret = bt_object_array_set(attr_field_obj, | |
201 | BT_CTF_ATTR_VALUE_INDEX, value_obj); | |
202 | goto end; | |
203 | } | |
204 | ||
205 | attr_field_obj = bt_object_array_create(); | |
206 | ||
207 | if (!attr_field_obj) { | |
208 | ret = -1; | |
209 | goto end; | |
210 | } | |
211 | ||
212 | ret = bt_object_array_append_string(attr_field_obj, name); | |
213 | ret |= bt_object_array_append(attr_field_obj, value_obj); | |
214 | ||
215 | if (ret) { | |
216 | goto end; | |
217 | } | |
218 | ||
219 | ret = bt_object_array_append(attr_obj, attr_field_obj); | |
220 | ||
221 | end: | |
222 | BT_OBJECT_PUT(attr_field_obj); | |
223 | ||
224 | return ret; | |
225 | } | |
226 | ||
227 | BT_HIDDEN | |
228 | struct bt_object *bt_ctf_attributes_get_field_value_by_name( | |
229 | struct bt_object *attr_obj, const char *name) | |
230 | { | |
231 | struct bt_object *value_obj = NULL; | |
232 | struct bt_object *attr_field_obj = NULL; | |
233 | ||
234 | if (!attr_obj || !name) { | |
235 | goto end; | |
236 | } | |
237 | ||
238 | attr_field_obj = bt_ctf_attributes_get_field_by_name(attr_obj, name); | |
239 | ||
240 | if (!attr_field_obj) { | |
241 | goto end; | |
242 | } | |
243 | ||
244 | value_obj = bt_object_array_get(attr_field_obj, | |
245 | BT_CTF_ATTR_VALUE_INDEX); | |
246 | ||
247 | end: | |
248 | BT_OBJECT_PUT(attr_field_obj); | |
249 | ||
250 | return value_obj; | |
251 | } | |
252 | ||
253 | BT_HIDDEN | |
254 | int bt_ctf_attributes_freeze(struct bt_object *attr_obj) | |
255 | { | |
256 | int i; | |
257 | int count; | |
258 | int ret = 0; | |
259 | ||
260 | if (!attr_obj) { | |
261 | ret = -1; | |
262 | goto end; | |
263 | } | |
264 | ||
265 | count = bt_object_array_size(attr_obj); | |
266 | ||
267 | if (count < 0) { | |
268 | ret = -1; | |
269 | goto end; | |
270 | } | |
271 | ||
272 | /* | |
273 | * We do not freeze the array itself here, since internal | |
274 | * stuff could need to modify/add attributes. Each attribute | |
275 | * is frozen one by one. | |
276 | */ | |
277 | for (i = 0; i < count; ++i) { | |
278 | struct bt_object *obj = NULL; | |
279 | ||
280 | obj = bt_ctf_attributes_get_field_value(attr_obj, i); | |
281 | ||
282 | if (!obj) { | |
283 | ret = -1; | |
284 | goto end; | |
285 | } | |
286 | ||
287 | bt_object_freeze(obj); | |
288 | BT_OBJECT_PUT(obj); | |
289 | } | |
290 | ||
291 | end: | |
292 | ||
293 | return ret; | |
294 | } |