Shaohua Li | cc372b1 | 2012-09-17 09:12:18 +0200 | [diff] [blame] | 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 | |
Jens Axboe | d366a95 | 2012-11-12 20:52:10 -0700 | [diff] [blame^] | 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 | */ |
Shaohua Li | cc372b1 | 2012-09-17 09:12:18 +0200 | [diff] [blame] | 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; |
Jens Axboe | d366a95 | 2012-11-12 20:52:10 -0700 | [diff] [blame^] | 91 | value->string = strdup_escape(str); |
Shaohua Li | cc372b1 | 2012-09-17 09:12:18 +0200 | [diff] [blame] | 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 | |
Shaohua Li | cc372b1 | 2012-09-17 09:12:18 +0200 | [diff] [blame] | 124 | static void json_free_pair(struct json_pair *pair); |
| 125 | static void json_free_value(struct json_value *value); |
Jens Axboe | f3afa57 | 2012-09-17 13:34:16 +0200 | [diff] [blame] | 126 | |
Shaohua Li | cc372b1 | 2012-09-17 09:12:18 +0200 | [diff] [blame] | 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 | } |