Commit | Line | Data |
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cc372b17 SL |
1 | #include <stdlib.h> |
2 | #include <string.h> | |
cc372b17 SL |
3 | #include <errno.h> |
4 | #include <stdarg.h> | |
5 | #include "json.h" | |
6 | #include "log.h" | |
7 | ||
8 | struct json_object *json_create_object(void) | |
9 | { | |
e75cc8f3 | 10 | return calloc(1, sizeof(struct json_object)); |
cc372b17 SL |
11 | } |
12 | ||
13 | struct json_array *json_create_array(void) | |
14 | { | |
e75cc8f3 | 15 | return calloc(1, sizeof(struct json_array)); |
cc372b17 SL |
16 | } |
17 | ||
18 | static struct json_pair *json_create_pair(const char *name, struct json_value *value) | |
19 | { | |
20 | struct json_pair *pair = malloc(sizeof(struct json_pair)); | |
21 | if (pair) { | |
22 | pair->name = strdup(name); | |
23 | pair->value = value; | |
24 | ||
25 | value->parent_type = JSON_PARENT_TYPE_PAIR; | |
26 | value->parent_pair = pair; | |
27 | } | |
28 | return pair; | |
29 | } | |
30 | ||
ee2e5717 | 31 | static struct json_value *json_create_value_int(long long number) |
cc372b17 SL |
32 | { |
33 | struct json_value *value = malloc(sizeof(struct json_value)); | |
34 | ||
35 | if (value) { | |
36 | value->type = JSON_TYPE_INTEGER; | |
37 | value->integer_number = number; | |
38 | } | |
39 | return value; | |
40 | } | |
41 | ||
a2972f96 | 42 | static struct json_value *json_create_value_float(double number) |
cc372b17 SL |
43 | { |
44 | struct json_value *value = malloc(sizeof(struct json_value)); | |
45 | ||
46 | if (value) { | |
47 | value->type = JSON_TYPE_FLOAT; | |
48 | value->float_number = number; | |
49 | } | |
50 | return value; | |
51 | } | |
52 | ||
d366a95e JA |
53 | static char *strdup_escape(const char *str) |
54 | { | |
55 | const char *input = str; | |
56 | char *p, *ret; | |
57 | int escapes; | |
58 | ||
a5725153 JA |
59 | if (!strlen(str)) |
60 | return NULL; | |
61 | ||
d366a95e JA |
62 | escapes = 0; |
63 | while ((input = strpbrk(input, "\\\"")) != NULL) { | |
64 | escapes++; | |
65 | input++; | |
66 | } | |
67 | ||
a5725153 | 68 | p = ret = malloc(strlen(str) + escapes + 1); |
d366a95e JA |
69 | while (*str) { |
70 | if (*str == '\\' || *str == '\"') | |
71 | *p++ = '\\'; | |
72 | *p++ = *str++; | |
73 | } | |
a5725153 | 74 | *p = '\0'; |
d366a95e JA |
75 | |
76 | return ret; | |
77 | } | |
78 | ||
79 | /* | |
de8f6de9 | 80 | * Valid JSON strings must escape '"' and '/' with a preceding '/' |
d366a95e | 81 | */ |
cc372b17 SL |
82 | static struct json_value *json_create_value_string(const char *str) |
83 | { | |
84 | struct json_value *value = malloc(sizeof(struct json_value)); | |
85 | ||
86 | if (value) { | |
87 | value->type = JSON_TYPE_STRING; | |
d366a95e | 88 | value->string = strdup_escape(str); |
cc372b17 SL |
89 | if (!value->string) { |
90 | free(value); | |
91 | value = NULL; | |
92 | } | |
93 | } | |
94 | return value; | |
95 | } | |
96 | ||
97 | static struct json_value *json_create_value_object(struct json_object *obj) | |
98 | { | |
99 | struct json_value *value = malloc(sizeof(struct json_value)); | |
100 | ||
101 | if (value) { | |
102 | value->type = JSON_TYPE_OBJECT; | |
103 | value->object = obj; | |
104 | obj->parent = value; | |
105 | } | |
106 | return value; | |
107 | } | |
108 | ||
109 | static struct json_value *json_create_value_array(struct json_array *array) | |
110 | { | |
111 | struct json_value *value = malloc(sizeof(struct json_value)); | |
112 | ||
113 | if (value) { | |
114 | value->type = JSON_TYPE_ARRAY; | |
115 | value->array = array; | |
116 | array->parent = value; | |
117 | } | |
118 | return value; | |
119 | } | |
120 | ||
cc372b17 SL |
121 | static void json_free_pair(struct json_pair *pair); |
122 | static void json_free_value(struct json_value *value); | |
f3afa57e | 123 | |
cc372b17 SL |
124 | void json_free_object(struct json_object *obj) |
125 | { | |
126 | int i; | |
127 | ||
128 | for (i = 0; i < obj->pair_cnt; i++) | |
129 | json_free_pair(obj->pairs[i]); | |
130 | free(obj->pairs); | |
131 | free(obj); | |
132 | } | |
133 | ||
134 | static void json_free_array(struct json_array *array) | |
135 | { | |
136 | int i; | |
137 | ||
138 | for (i = 0; i < array->value_cnt; i++) | |
139 | json_free_value(array->values[i]); | |
140 | free(array->values); | |
141 | free(array); | |
142 | } | |
143 | ||
144 | static void json_free_pair(struct json_pair *pair) | |
145 | { | |
146 | json_free_value(pair->value); | |
147 | free(pair->name); | |
148 | free(pair); | |
149 | } | |
150 | ||
151 | static void json_free_value(struct json_value *value) | |
152 | { | |
153 | switch (value->type) { | |
154 | case JSON_TYPE_STRING: | |
155 | free(value->string); | |
156 | break; | |
157 | case JSON_TYPE_OBJECT: | |
158 | json_free_object(value->object); | |
159 | break; | |
160 | case JSON_TYPE_ARRAY: | |
161 | json_free_array(value->array); | |
162 | break; | |
163 | } | |
164 | free(value); | |
165 | } | |
166 | ||
167 | static int json_array_add_value(struct json_array *array, struct json_value *value) | |
168 | { | |
169 | struct json_value **values = realloc(array->values, | |
170 | sizeof(struct json_value *) * (array->value_cnt + 1)); | |
171 | ||
172 | if (!values) | |
173 | return ENOMEM; | |
174 | values[array->value_cnt] = value; | |
175 | array->value_cnt++; | |
176 | array->values = values; | |
177 | ||
178 | value->parent_type = JSON_PARENT_TYPE_ARRAY; | |
179 | value->parent_array = array; | |
180 | return 0; | |
181 | } | |
182 | ||
183 | static int json_object_add_pair(struct json_object *obj, struct json_pair *pair) | |
184 | { | |
185 | struct json_pair **pairs = realloc(obj->pairs, | |
186 | sizeof(struct json_pair *) * (obj->pair_cnt + 1)); | |
187 | if (!pairs) | |
188 | return ENOMEM; | |
189 | pairs[obj->pair_cnt] = pair; | |
190 | obj->pair_cnt++; | |
191 | obj->pairs = pairs; | |
192 | ||
193 | pair->parent = obj; | |
194 | return 0; | |
195 | } | |
196 | ||
197 | int json_object_add_value_type(struct json_object *obj, const char *name, int type, ...) | |
198 | { | |
199 | struct json_value *value; | |
200 | struct json_pair *pair; | |
201 | va_list args; | |
202 | int ret; | |
203 | ||
204 | va_start(args, type); | |
205 | if (type == JSON_TYPE_STRING) | |
206 | value = json_create_value_string(va_arg(args, char *)); | |
207 | else if (type == JSON_TYPE_INTEGER) | |
ee2e5717 | 208 | value = json_create_value_int(va_arg(args, long long)); |
cc372b17 SL |
209 | else if (type == JSON_TYPE_FLOAT) |
210 | value = json_create_value_float(va_arg(args, double)); | |
211 | else if (type == JSON_TYPE_OBJECT) | |
212 | value = json_create_value_object(va_arg(args, struct json_object *)); | |
213 | else | |
214 | value = json_create_value_array(va_arg(args, struct json_array *)); | |
215 | va_end(args); | |
216 | ||
217 | if (!value) | |
218 | return ENOMEM; | |
219 | ||
220 | pair = json_create_pair(name, value); | |
221 | if (!pair) { | |
222 | json_free_value(value); | |
223 | return ENOMEM; | |
224 | } | |
225 | ret = json_object_add_pair(obj, pair); | |
226 | if (ret) { | |
227 | json_free_pair(pair); | |
228 | return ENOMEM; | |
229 | } | |
230 | return 0; | |
231 | } | |
232 | ||
a666cab8 | 233 | static void json_print_array(struct json_array *array, struct buf_output *); |
cc372b17 SL |
234 | int json_array_add_value_type(struct json_array *array, int type, ...) |
235 | { | |
236 | struct json_value *value; | |
237 | va_list args; | |
238 | int ret; | |
239 | ||
240 | va_start(args, type); | |
241 | if (type == JSON_TYPE_STRING) | |
242 | value = json_create_value_string(va_arg(args, char *)); | |
243 | else if (type == JSON_TYPE_INTEGER) | |
ee2e5717 | 244 | value = json_create_value_int(va_arg(args, long long)); |
cc372b17 SL |
245 | else if (type == JSON_TYPE_FLOAT) |
246 | value = json_create_value_float(va_arg(args, double)); | |
247 | else if (type == JSON_TYPE_OBJECT) | |
248 | value = json_create_value_object(va_arg(args, struct json_object *)); | |
249 | else | |
250 | value = json_create_value_array(va_arg(args, struct json_array *)); | |
251 | va_end(args); | |
252 | ||
253 | if (!value) | |
254 | return ENOMEM; | |
255 | ||
256 | ret = json_array_add_value(array, value); | |
257 | if (ret) { | |
258 | json_free_value(value); | |
259 | return ENOMEM; | |
260 | } | |
261 | return 0; | |
262 | } | |
263 | ||
264 | static int json_value_level(struct json_value *value); | |
265 | static int json_pair_level(struct json_pair *pair); | |
266 | static int json_array_level(struct json_array *array); | |
267 | static int json_object_level(struct json_object *object) | |
268 | { | |
269 | if (object->parent == NULL) | |
270 | return 0; | |
271 | return json_value_level(object->parent); | |
272 | } | |
273 | ||
274 | static int json_pair_level(struct json_pair *pair) | |
275 | { | |
276 | return json_object_level(pair->parent) + 1; | |
277 | } | |
278 | ||
279 | static int json_array_level(struct json_array *array) | |
280 | { | |
281 | return json_value_level(array->parent); | |
282 | } | |
283 | ||
284 | static int json_value_level(struct json_value *value) | |
285 | { | |
286 | if (value->parent_type == JSON_PARENT_TYPE_PAIR) | |
287 | return json_pair_level(value->parent_pair); | |
288 | else | |
289 | return json_array_level(value->parent_array) + 1; | |
290 | } | |
291 | ||
a666cab8 | 292 | static void json_print_level(int level, struct buf_output *out) |
cc372b17 SL |
293 | { |
294 | while (level-- > 0) | |
a666cab8 | 295 | log_buf(out, " "); |
cc372b17 SL |
296 | } |
297 | ||
a666cab8 JA |
298 | static void json_print_pair(struct json_pair *pair, struct buf_output *); |
299 | static void json_print_array(struct json_array *array, struct buf_output *); | |
300 | static void json_print_value(struct json_value *value, struct buf_output *); | |
301 | void json_print_object(struct json_object *obj, struct buf_output *out) | |
cc372b17 SL |
302 | { |
303 | int i; | |
304 | ||
a666cab8 | 305 | log_buf(out, "{\n"); |
cc372b17 SL |
306 | for (i = 0; i < obj->pair_cnt; i++) { |
307 | if (i > 0) | |
a666cab8 JA |
308 | log_buf(out, ",\n"); |
309 | json_print_pair(obj->pairs[i], out); | |
cc372b17 | 310 | } |
a666cab8 JA |
311 | log_buf(out, "\n"); |
312 | json_print_level(json_object_level(obj), out); | |
313 | log_buf(out, "}"); | |
cc372b17 SL |
314 | } |
315 | ||
a666cab8 | 316 | static void json_print_pair(struct json_pair *pair, struct buf_output *out) |
cc372b17 | 317 | { |
a666cab8 JA |
318 | json_print_level(json_pair_level(pair), out); |
319 | log_buf(out, "\"%s\" : ", pair->name); | |
320 | json_print_value(pair->value, out); | |
cc372b17 SL |
321 | } |
322 | ||
a666cab8 | 323 | static void json_print_array(struct json_array *array, struct buf_output *out) |
cc372b17 SL |
324 | { |
325 | int i; | |
326 | ||
a666cab8 | 327 | log_buf(out, "[\n"); |
cc372b17 SL |
328 | for (i = 0; i < array->value_cnt; i++) { |
329 | if (i > 0) | |
a666cab8 JA |
330 | log_buf(out, ",\n"); |
331 | json_print_level(json_value_level(array->values[i]), out); | |
332 | json_print_value(array->values[i], out); | |
cc372b17 | 333 | } |
a666cab8 JA |
334 | log_buf(out, "\n"); |
335 | json_print_level(json_array_level(array), out); | |
336 | log_buf(out, "]"); | |
cc372b17 SL |
337 | } |
338 | ||
a666cab8 | 339 | static void json_print_value(struct json_value *value, struct buf_output *out) |
cc372b17 SL |
340 | { |
341 | switch (value->type) { | |
2374148c JA |
342 | case JSON_TYPE_STRING: |
343 | log_buf(out, "\"%s\"", value->string); | |
344 | break; | |
cc372b17 | 345 | case JSON_TYPE_INTEGER: |
a666cab8 | 346 | log_buf(out, "%lld", value->integer_number); |
cc372b17 SL |
347 | break; |
348 | case JSON_TYPE_FLOAT: | |
817720e1 | 349 | log_buf(out, "%f", value->float_number); |
cc372b17 SL |
350 | break; |
351 | case JSON_TYPE_OBJECT: | |
a666cab8 | 352 | json_print_object(value->object, out); |
cc372b17 SL |
353 | break; |
354 | case JSON_TYPE_ARRAY: | |
a666cab8 | 355 | json_print_array(value->array, out); |
cc372b17 SL |
356 | break; |
357 | } | |
358 | } |