Commit | Line | Data |
---|---|---|
1c822dfb 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/values.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_value *bt_ctf_attributes_create(void) | |
36 | { | |
37 | /* | |
38 | * Attributes: array value object of array value objects, each one | |
39 | * containing two entries: a string value object (attributes | |
40 | * field name), and a value 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_value_array_create(); | |
52 | } | |
53 | ||
54 | BT_HIDDEN | |
55 | void bt_ctf_attributes_destroy(struct bt_value *attr_obj) | |
56 | { | |
57 | bt_put(attr_obj); | |
58 | } | |
59 | ||
60 | BT_HIDDEN | |
61 | int bt_ctf_attributes_get_count(struct bt_value *attr_obj) | |
62 | { | |
63 | return bt_value_array_size(attr_obj); | |
64 | } | |
65 | ||
66 | BT_HIDDEN | |
67 | const char *bt_ctf_attributes_get_field_name(struct bt_value *attr_obj, | |
68 | int index) | |
69 | { | |
70 | int rc; | |
71 | const char *ret = NULL; | |
72 | struct bt_value *attr_field_obj = NULL; | |
73 | struct bt_value *attr_field_name_obj = NULL; | |
74 | ||
75 | if (!attr_obj || index < 0) { | |
76 | goto end; | |
77 | } | |
78 | ||
79 | attr_field_obj = bt_value_array_get(attr_obj, index); | |
80 | ||
81 | if (!attr_field_obj) { | |
82 | goto end; | |
83 | } | |
84 | ||
85 | attr_field_name_obj = bt_value_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_value_string_get(attr_field_name_obj, &ret); | |
93 | ||
94 | if (rc) { | |
95 | ret = NULL; | |
96 | } | |
97 | ||
98 | end: | |
99 | BT_PUT(attr_field_name_obj); | |
100 | BT_PUT(attr_field_obj); | |
101 | return ret; | |
102 | } | |
103 | ||
104 | BT_HIDDEN | |
105 | struct bt_value *bt_ctf_attributes_get_field_value(struct bt_value *attr_obj, | |
106 | int index) | |
107 | { | |
108 | struct bt_value *value_obj = NULL; | |
109 | struct bt_value *attr_field_obj = NULL; | |
110 | ||
111 | if (!attr_obj || index < 0) { | |
112 | goto end; | |
113 | } | |
114 | ||
115 | attr_field_obj = bt_value_array_get(attr_obj, index); | |
116 | ||
117 | if (!attr_field_obj) { | |
118 | goto end; | |
119 | } | |
120 | ||
121 | value_obj = bt_value_array_get(attr_field_obj, | |
122 | BT_CTF_ATTR_VALUE_INDEX); | |
123 | ||
124 | end: | |
125 | BT_PUT(attr_field_obj); | |
126 | return value_obj; | |
127 | } | |
128 | ||
129 | static | |
130 | struct bt_value *bt_ctf_attributes_get_field_by_name( | |
131 | struct bt_value *attr_obj, const char *name) | |
132 | { | |
133 | int i; | |
134 | int attr_size; | |
135 | struct bt_value *value_obj = NULL; | |
136 | struct bt_value *attr_field_name_obj = NULL; | |
137 | ||
138 | attr_size = bt_value_array_size(attr_obj); | |
139 | ||
140 | if (attr_size < 0) { | |
141 | goto error; | |
142 | } | |
143 | ||
144 | for (i = 0; i < attr_size; ++i) { | |
145 | int ret; | |
146 | const char *field_name; | |
147 | ||
148 | value_obj = bt_value_array_get(attr_obj, i); | |
149 | ||
150 | if (!value_obj) { | |
151 | goto error; | |
152 | } | |
153 | ||
154 | attr_field_name_obj = bt_value_array_get(value_obj, 0); | |
155 | ||
156 | if (!attr_field_name_obj) { | |
157 | goto error; | |
158 | } | |
159 | ||
160 | ret = bt_value_string_get(attr_field_name_obj, &field_name); | |
161 | if (ret) { | |
162 | goto error; | |
163 | } | |
164 | ||
165 | if (!strcmp(field_name, name)) { | |
166 | BT_PUT(attr_field_name_obj); | |
167 | break; | |
168 | } | |
169 | ||
170 | BT_PUT(attr_field_name_obj); | |
171 | BT_PUT(value_obj); | |
172 | } | |
173 | ||
174 | return value_obj; | |
175 | ||
176 | error: | |
177 | BT_PUT(attr_field_name_obj); | |
178 | BT_PUT(value_obj); | |
179 | ||
180 | return value_obj; | |
181 | } | |
182 | ||
183 | BT_HIDDEN | |
184 | int bt_ctf_attributes_set_field_value(struct bt_value *attr_obj, | |
185 | const char *name, struct bt_value *value_obj) | |
186 | { | |
187 | int ret = 0; | |
188 | struct bt_value *attr_field_obj = NULL; | |
189 | ||
190 | if (!attr_obj || !name || !value_obj) { | |
191 | ret = -1; | |
192 | goto end; | |
193 | } | |
194 | ||
195 | attr_field_obj = bt_ctf_attributes_get_field_by_name(attr_obj, name); | |
196 | ||
197 | if (attr_field_obj) { | |
198 | ret = bt_value_array_set(attr_field_obj, | |
199 | BT_CTF_ATTR_VALUE_INDEX, value_obj); | |
200 | goto end; | |
201 | } | |
202 | ||
203 | attr_field_obj = bt_value_array_create(); | |
204 | ||
205 | if (!attr_field_obj) { | |
206 | ret = -1; | |
207 | goto end; | |
208 | } | |
209 | ||
210 | ret = bt_value_array_append_string(attr_field_obj, name); | |
211 | ret |= bt_value_array_append(attr_field_obj, value_obj); | |
212 | ||
213 | if (ret) { | |
214 | goto end; | |
215 | } | |
216 | ||
217 | ret = bt_value_array_append(attr_obj, attr_field_obj); | |
218 | ||
219 | end: | |
220 | BT_PUT(attr_field_obj); | |
221 | ||
222 | return ret; | |
223 | } | |
224 | ||
225 | BT_HIDDEN | |
226 | struct bt_value *bt_ctf_attributes_get_field_value_by_name( | |
227 | struct bt_value *attr_obj, const char *name) | |
228 | { | |
229 | struct bt_value *value_obj = NULL; | |
230 | struct bt_value *attr_field_obj = NULL; | |
231 | ||
232 | if (!attr_obj || !name) { | |
233 | goto end; | |
234 | } | |
235 | ||
236 | attr_field_obj = bt_ctf_attributes_get_field_by_name(attr_obj, name); | |
237 | ||
238 | if (!attr_field_obj) { | |
239 | goto end; | |
240 | } | |
241 | ||
242 | value_obj = bt_value_array_get(attr_field_obj, | |
243 | BT_CTF_ATTR_VALUE_INDEX); | |
244 | ||
245 | end: | |
246 | BT_PUT(attr_field_obj); | |
247 | ||
248 | return value_obj; | |
249 | } | |
250 | ||
251 | BT_HIDDEN | |
252 | int bt_ctf_attributes_freeze(struct bt_value *attr_obj) | |
253 | { | |
254 | int i; | |
255 | int count; | |
256 | int ret = 0; | |
257 | ||
258 | if (!attr_obj) { | |
259 | ret = -1; | |
260 | goto end; | |
261 | } | |
262 | ||
263 | count = bt_value_array_size(attr_obj); | |
264 | ||
265 | if (count < 0) { | |
266 | ret = -1; | |
267 | goto end; | |
268 | } | |
269 | ||
270 | /* | |
271 | * We do not freeze the array value object itself here, since | |
272 | * internal stuff could need to modify/add attributes. Each | |
273 | * attribute is frozen one by one. | |
274 | */ | |
275 | for (i = 0; i < count; ++i) { | |
276 | struct bt_value *obj = NULL; | |
277 | ||
278 | obj = bt_ctf_attributes_get_field_value(attr_obj, i); | |
279 | ||
280 | if (!obj) { | |
281 | ret = -1; | |
282 | goto end; | |
283 | } | |
284 | ||
285 | bt_value_freeze(obj); | |
286 | BT_PUT(obj); | |
287 | } | |
288 | ||
289 | end: | |
290 | return ret; | |
291 | } |