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