Commit | Line | Data |
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cc372b17 SL |
1 | #include <stdlib.h> |
2 | #include <string.h> | |
3 | #include <stdio.h> | |
4 | #include <errno.h> | |
5 | #include <stdarg.h> | |
6 | #include "json.h" | |
7 | #include "log.h" | |
8 | ||
9 | struct json_object *json_create_object(void) | |
10 | { | |
11 | struct json_object *obj = malloc(sizeof(struct json_object)); | |
12 | if (obj) | |
13 | memset(obj, 0, sizeof(struct json_object)); | |
14 | return obj; | |
15 | } | |
16 | ||
17 | struct json_array *json_create_array(void) | |
18 | { | |
19 | struct json_array *array = malloc(sizeof(struct json_array)); | |
20 | if (array) | |
21 | memset(array, 0, sizeof(struct json_array)); | |
22 | return array; | |
23 | } | |
24 | ||
25 | static struct json_pair *json_create_pair(const char *name, struct json_value *value) | |
26 | { | |
27 | struct json_pair *pair = malloc(sizeof(struct json_pair)); | |
28 | if (pair) { | |
29 | pair->name = strdup(name); | |
30 | pair->value = value; | |
31 | ||
32 | value->parent_type = JSON_PARENT_TYPE_PAIR; | |
33 | value->parent_pair = pair; | |
34 | } | |
35 | return pair; | |
36 | } | |
37 | ||
38 | static struct json_value *json_create_value_int(long number) | |
39 | { | |
40 | struct json_value *value = malloc(sizeof(struct json_value)); | |
41 | ||
42 | if (value) { | |
43 | value->type = JSON_TYPE_INTEGER; | |
44 | value->integer_number = number; | |
45 | } | |
46 | return value; | |
47 | } | |
48 | ||
49 | static struct json_value *json_create_value_float(float number) | |
50 | { | |
51 | struct json_value *value = malloc(sizeof(struct json_value)); | |
52 | ||
53 | if (value) { | |
54 | value->type = JSON_TYPE_FLOAT; | |
55 | value->float_number = number; | |
56 | } | |
57 | return value; | |
58 | } | |
59 | ||
d366a95e JA |
60 | static char *strdup_escape(const char *str) |
61 | { | |
62 | const char *input = str; | |
63 | char *p, *ret; | |
64 | int escapes; | |
65 | ||
a5725153 JA |
66 | if (!strlen(str)) |
67 | return NULL; | |
68 | ||
d366a95e JA |
69 | escapes = 0; |
70 | while ((input = strpbrk(input, "\\\"")) != NULL) { | |
71 | escapes++; | |
72 | input++; | |
73 | } | |
74 | ||
a5725153 | 75 | p = ret = malloc(strlen(str) + escapes + 1); |
d366a95e JA |
76 | while (*str) { |
77 | if (*str == '\\' || *str == '\"') | |
78 | *p++ = '\\'; | |
79 | *p++ = *str++; | |
80 | } | |
a5725153 | 81 | *p = '\0'; |
d366a95e JA |
82 | |
83 | return ret; | |
84 | } | |
85 | ||
86 | /* | |
de8f6de9 | 87 | * Valid JSON strings must escape '"' and '/' with a preceding '/' |
d366a95e | 88 | */ |
cc372b17 SL |
89 | static struct json_value *json_create_value_string(const char *str) |
90 | { | |
91 | struct json_value *value = malloc(sizeof(struct json_value)); | |
92 | ||
93 | if (value) { | |
94 | value->type = JSON_TYPE_STRING; | |
d366a95e | 95 | value->string = strdup_escape(str); |
cc372b17 SL |
96 | if (!value->string) { |
97 | free(value); | |
98 | value = NULL; | |
99 | } | |
100 | } | |
101 | return value; | |
102 | } | |
103 | ||
104 | static struct json_value *json_create_value_object(struct json_object *obj) | |
105 | { | |
106 | struct json_value *value = malloc(sizeof(struct json_value)); | |
107 | ||
108 | if (value) { | |
109 | value->type = JSON_TYPE_OBJECT; | |
110 | value->object = obj; | |
111 | obj->parent = value; | |
112 | } | |
113 | return value; | |
114 | } | |
115 | ||
116 | static struct json_value *json_create_value_array(struct json_array *array) | |
117 | { | |
118 | struct json_value *value = malloc(sizeof(struct json_value)); | |
119 | ||
120 | if (value) { | |
121 | value->type = JSON_TYPE_ARRAY; | |
122 | value->array = array; | |
123 | array->parent = value; | |
124 | } | |
125 | return value; | |
126 | } | |
127 | ||
cc372b17 SL |
128 | static void json_free_pair(struct json_pair *pair); |
129 | static void json_free_value(struct json_value *value); | |
f3afa57e | 130 | |
cc372b17 SL |
131 | void json_free_object(struct json_object *obj) |
132 | { | |
133 | int i; | |
134 | ||
135 | for (i = 0; i < obj->pair_cnt; i++) | |
136 | json_free_pair(obj->pairs[i]); | |
137 | free(obj->pairs); | |
138 | free(obj); | |
139 | } | |
140 | ||
141 | static void json_free_array(struct json_array *array) | |
142 | { | |
143 | int i; | |
144 | ||
145 | for (i = 0; i < array->value_cnt; i++) | |
146 | json_free_value(array->values[i]); | |
147 | free(array->values); | |
148 | free(array); | |
149 | } | |
150 | ||
151 | static void json_free_pair(struct json_pair *pair) | |
152 | { | |
153 | json_free_value(pair->value); | |
154 | free(pair->name); | |
155 | free(pair); | |
156 | } | |
157 | ||
158 | static void json_free_value(struct json_value *value) | |
159 | { | |
160 | switch (value->type) { | |
161 | case JSON_TYPE_STRING: | |
162 | free(value->string); | |
163 | break; | |
164 | case JSON_TYPE_OBJECT: | |
165 | json_free_object(value->object); | |
166 | break; | |
167 | case JSON_TYPE_ARRAY: | |
168 | json_free_array(value->array); | |
169 | break; | |
170 | } | |
171 | free(value); | |
172 | } | |
173 | ||
174 | static int json_array_add_value(struct json_array *array, struct json_value *value) | |
175 | { | |
176 | struct json_value **values = realloc(array->values, | |
177 | sizeof(struct json_value *) * (array->value_cnt + 1)); | |
178 | ||
179 | if (!values) | |
180 | return ENOMEM; | |
181 | values[array->value_cnt] = value; | |
182 | array->value_cnt++; | |
183 | array->values = values; | |
184 | ||
185 | value->parent_type = JSON_PARENT_TYPE_ARRAY; | |
186 | value->parent_array = array; | |
187 | return 0; | |
188 | } | |
189 | ||
190 | static int json_object_add_pair(struct json_object *obj, struct json_pair *pair) | |
191 | { | |
192 | struct json_pair **pairs = realloc(obj->pairs, | |
193 | sizeof(struct json_pair *) * (obj->pair_cnt + 1)); | |
194 | if (!pairs) | |
195 | return ENOMEM; | |
196 | pairs[obj->pair_cnt] = pair; | |
197 | obj->pair_cnt++; | |
198 | obj->pairs = pairs; | |
199 | ||
200 | pair->parent = obj; | |
201 | return 0; | |
202 | } | |
203 | ||
204 | int json_object_add_value_type(struct json_object *obj, const char *name, int type, ...) | |
205 | { | |
206 | struct json_value *value; | |
207 | struct json_pair *pair; | |
208 | va_list args; | |
209 | int ret; | |
210 | ||
211 | va_start(args, type); | |
212 | if (type == JSON_TYPE_STRING) | |
213 | value = json_create_value_string(va_arg(args, char *)); | |
214 | else if (type == JSON_TYPE_INTEGER) | |
215 | value = json_create_value_int(va_arg(args, long)); | |
216 | else if (type == JSON_TYPE_FLOAT) | |
217 | value = json_create_value_float(va_arg(args, double)); | |
218 | else if (type == JSON_TYPE_OBJECT) | |
219 | value = json_create_value_object(va_arg(args, struct json_object *)); | |
220 | else | |
221 | value = json_create_value_array(va_arg(args, struct json_array *)); | |
222 | va_end(args); | |
223 | ||
224 | if (!value) | |
225 | return ENOMEM; | |
226 | ||
227 | pair = json_create_pair(name, value); | |
228 | if (!pair) { | |
229 | json_free_value(value); | |
230 | return ENOMEM; | |
231 | } | |
232 | ret = json_object_add_pair(obj, pair); | |
233 | if (ret) { | |
234 | json_free_pair(pair); | |
235 | return ENOMEM; | |
236 | } | |
237 | return 0; | |
238 | } | |
239 | ||
240 | static void json_print_array(struct json_array *array); | |
241 | int json_array_add_value_type(struct json_array *array, int type, ...) | |
242 | { | |
243 | struct json_value *value; | |
244 | va_list args; | |
245 | int ret; | |
246 | ||
247 | va_start(args, type); | |
248 | if (type == JSON_TYPE_STRING) | |
249 | value = json_create_value_string(va_arg(args, char *)); | |
250 | else if (type == JSON_TYPE_INTEGER) | |
251 | value = json_create_value_int(va_arg(args, long)); | |
252 | else if (type == JSON_TYPE_FLOAT) | |
253 | value = json_create_value_float(va_arg(args, double)); | |
254 | else if (type == JSON_TYPE_OBJECT) | |
255 | value = json_create_value_object(va_arg(args, struct json_object *)); | |
256 | else | |
257 | value = json_create_value_array(va_arg(args, struct json_array *)); | |
258 | va_end(args); | |
259 | ||
260 | if (!value) | |
261 | return ENOMEM; | |
262 | ||
263 | ret = json_array_add_value(array, value); | |
264 | if (ret) { | |
265 | json_free_value(value); | |
266 | return ENOMEM; | |
267 | } | |
268 | return 0; | |
269 | } | |
270 | ||
271 | static int json_value_level(struct json_value *value); | |
272 | static int json_pair_level(struct json_pair *pair); | |
273 | static int json_array_level(struct json_array *array); | |
274 | static int json_object_level(struct json_object *object) | |
275 | { | |
276 | if (object->parent == NULL) | |
277 | return 0; | |
278 | return json_value_level(object->parent); | |
279 | } | |
280 | ||
281 | static int json_pair_level(struct json_pair *pair) | |
282 | { | |
283 | return json_object_level(pair->parent) + 1; | |
284 | } | |
285 | ||
286 | static int json_array_level(struct json_array *array) | |
287 | { | |
288 | return json_value_level(array->parent); | |
289 | } | |
290 | ||
291 | static int json_value_level(struct json_value *value) | |
292 | { | |
293 | if (value->parent_type == JSON_PARENT_TYPE_PAIR) | |
294 | return json_pair_level(value->parent_pair); | |
295 | else | |
296 | return json_array_level(value->parent_array) + 1; | |
297 | } | |
298 | ||
299 | static void json_print_level(int level) | |
300 | { | |
301 | while (level-- > 0) | |
302 | log_info(" "); | |
303 | } | |
304 | ||
305 | static void json_print_pair(struct json_pair *pair); | |
306 | static void json_print_array(struct json_array *array); | |
307 | static void json_print_value(struct json_value *value); | |
308 | void json_print_object(struct json_object *obj) | |
309 | { | |
310 | int i; | |
311 | ||
312 | log_info("{\n"); | |
313 | for (i = 0; i < obj->pair_cnt; i++) { | |
314 | if (i > 0) | |
315 | log_info(",\n"); | |
316 | json_print_pair(obj->pairs[i]); | |
317 | } | |
318 | log_info("\n"); | |
319 | json_print_level(json_object_level(obj)); | |
320 | log_info("}"); | |
321 | } | |
322 | ||
323 | static void json_print_pair(struct json_pair *pair) | |
324 | { | |
325 | json_print_level(json_pair_level(pair)); | |
326 | log_info("\"%s\" : ", pair->name); | |
327 | json_print_value(pair->value); | |
328 | } | |
329 | ||
330 | static void json_print_array(struct json_array *array) | |
331 | { | |
332 | int i; | |
333 | ||
334 | log_info("[\n"); | |
335 | for (i = 0; i < array->value_cnt; i++) { | |
336 | if (i > 0) | |
337 | log_info(",\n"); | |
338 | json_print_level(json_value_level(array->values[i])); | |
339 | json_print_value(array->values[i]); | |
340 | } | |
341 | log_info("\n"); | |
342 | json_print_level(json_array_level(array)); | |
343 | log_info("]"); | |
344 | } | |
345 | ||
346 | static void json_print_value(struct json_value *value) | |
347 | { | |
348 | switch (value->type) { | |
349 | case JSON_TYPE_STRING: | |
350 | log_info("\"%s\"", value->string); | |
351 | break; | |
352 | case JSON_TYPE_INTEGER: | |
353 | log_info("%ld", value->integer_number); | |
354 | break; | |
355 | case JSON_TYPE_FLOAT: | |
356 | log_info("%.2f", value->float_number); | |
357 | break; | |
358 | case JSON_TYPE_OBJECT: | |
359 | json_print_object(value->object); | |
360 | break; | |
361 | case JSON_TYPE_ARRAY: | |
362 | json_print_array(value->array); | |
363 | break; | |
364 | } | |
365 | } |