2 * Copyright (c) 2009-2012 Petri Lehtinen <petri@digip.org>
4 * Jansson is free software; you can redistribute it and/or modify
5 * it under the terms of the MIT license. See LICENSE for details.
15 #include "jansson_private.h"
16 #include "strbuffer.h"
19 #define MAX_INTEGER_STR_LENGTH 100
20 #define MAX_REAL_STR_LENGTH 100
27 static int dump_to_strbuffer(const char *buffer, size_t size, void *data)
29 return strbuffer_append_bytes((strbuffer_t *)data, buffer, size);
32 static int dump_to_file(const char *buffer, size_t size, void *data)
34 FILE *dest = (FILE *)data;
35 if(fwrite(buffer, size, 1, dest) != 1)
40 /* 32 spaces (the maximum indentation size) */
41 static char whitespace[] = " ";
43 static int dump_indent(size_t flags, int depth, int space, json_dump_callback_t dump, void *data)
45 if(JSON_INDENT(flags) > 0)
47 int i, ws_count = JSON_INDENT(flags);
49 if(dump("\n", 1, data))
52 for(i = 0; i < depth; i++)
54 if(dump(whitespace, ws_count, data))
58 else if(space && !(flags & JSON_COMPACT))
60 return dump(" ", 1, data);
65 static int dump_string(const char *str, int ascii, json_dump_callback_t dump, void *data)
67 const char *pos, *end;
70 if(dump("\"", 1, data))
82 end = utf8_iterate(pos, &codepoint);
86 /* mandatory escape or control char */
87 if(codepoint == '\\' || codepoint == '"' || codepoint < 0x20)
91 if(ascii && codepoint > 0x7F)
98 if(dump(str, pos - str, data))
105 /* handle \, ", and control codes */
109 case '\\': text = "\\\\"; break;
110 case '\"': text = "\\\""; break;
111 case '\b': text = "\\b"; break;
112 case '\f': text = "\\f"; break;
113 case '\n': text = "\\n"; break;
114 case '\r': text = "\\r"; break;
115 case '\t': text = "\\t"; break;
118 /* codepoint is in BMP */
119 if(codepoint < 0x10000)
121 sprintf(seq, "\\u%04x", codepoint);
125 /* not in BMP -> construct a UTF-16 surrogate pair */
130 codepoint -= 0x10000;
131 first = 0xD800 | ((codepoint & 0xffc00) >> 10);
132 last = 0xDC00 | (codepoint & 0x003ff);
134 sprintf(seq, "\\u%04x\\u%04x", first, last);
143 if(dump(text, length, data))
149 return dump("\"", 1, data);
152 static int object_key_compare_keys(const void *key1, const void *key2)
154 return strcmp(((const struct object_key *)key1)->key,
155 ((const struct object_key *)key2)->key);
158 static int object_key_compare_serials(const void *key1, const void *key2)
160 size_t a = ((const struct object_key *)key1)->serial;
161 size_t b = ((const struct object_key *)key2)->serial;
163 return a < b ? -1 : a == b ? 0 : 1;
166 static int do_dump(const json_t *json, size_t flags, int depth,
167 json_dump_callback_t dump, void *data)
169 int ascii = flags & JSON_ENSURE_ASCII ? 1 : 0;
171 switch(json_typeof(json)) {
173 return dump("null", 4, data);
176 return dump("true", 4, data);
179 return dump("false", 5, data);
183 char buffer[MAX_INTEGER_STR_LENGTH];
186 size = snprintf(buffer, MAX_INTEGER_STR_LENGTH,
187 "%" JSON_INTEGER_FORMAT,
188 json_integer_value(json));
189 if(size >= MAX_INTEGER_STR_LENGTH)
192 return dump(buffer, size, data);
197 char buffer[MAX_REAL_STR_LENGTH];
199 double value = json_real_value(json);
201 size = jsonp_dtostr(buffer, MAX_REAL_STR_LENGTH, value);
205 return dump(buffer, size, data);
209 return dump_string(json_string_value(json), ascii, dump, data);
217 /* detect circular references */
218 array = json_to_array(json);
223 n = json_array_size(json);
225 if(dump("[", 1, data))
229 return dump("]", 1, data);
231 if(dump_indent(flags, depth + 1, 0, dump, data))
234 for(i = 0; i < n; ++i) {
235 if(do_dump(json_array_get(json, i), flags, depth + 1,
241 if(dump(",", 1, data) ||
242 dump_indent(flags, depth + 1, 1, dump, data))
247 if(dump_indent(flags, depth, 0, dump, data))
253 return dump("]", 1, data);
262 json_object_t *object;
264 const char *separator;
265 int separator_length;
267 if(flags & JSON_COMPACT) {
269 separator_length = 1;
273 separator_length = 2;
276 /* detect circular references */
277 object = json_to_object(json);
282 iter = json_object_iter((json_t *)json);
284 if(dump("{", 1, data))
288 return dump("}", 1, data);
290 if(dump_indent(flags, depth + 1, 0, dump, data))
293 if(flags & JSON_SORT_KEYS || flags & JSON_PRESERVE_ORDER)
295 struct object_key *keys;
297 int (*cmp_func)(const void *, const void *);
299 size = json_object_size(json);
300 keys = jsonp_malloc(size * sizeof(struct object_key));
307 keys[i].serial = hashtable_iter_serial(iter);
308 keys[i].key = json_object_iter_key(iter);
309 iter = json_object_iter_next((json_t *)json, iter);
314 if(flags & JSON_SORT_KEYS)
315 cmp_func = object_key_compare_keys;
317 cmp_func = object_key_compare_serials;
319 qsort(keys, size, sizeof(struct object_key), cmp_func);
321 for(i = 0; i < size; i++)
327 value = json_object_get(json, key);
330 dump_string(key, ascii, dump, data);
331 if(dump(separator, separator_length, data) ||
332 do_dump(value, flags, depth + 1, dump, data))
340 if(dump(",", 1, data) ||
341 dump_indent(flags, depth + 1, 1, dump, data))
349 if(dump_indent(flags, depth, 0, dump, data))
361 /* Don't sort keys */
365 void *next = json_object_iter_next((json_t *)json, iter);
367 dump_string(json_object_iter_key(iter), ascii, dump, data);
368 if(dump(separator, separator_length, data) ||
369 do_dump(json_object_iter_value(iter), flags, depth + 1,
375 if(dump(",", 1, data) ||
376 dump_indent(flags, depth + 1, 1, dump, data))
381 if(dump_indent(flags, depth, 0, dump, data))
390 return dump("}", 1, data);
403 char *json_dumps(const json_t *json, size_t flags)
408 if(strbuffer_init(&strbuff))
411 if(json_dump_callback(json, dump_to_strbuffer, (void *)&strbuff, flags))
414 result = jsonp_strdup(strbuffer_value(&strbuff));
416 strbuffer_close(&strbuff);
420 int json_dumpf(const json_t *json, FILE *output, size_t flags)
422 return json_dump_callback(json, dump_to_file, (void *)output, flags);
425 int json_dump_file(const json_t *json, const char *path, size_t flags)
429 FILE *output = fopen(path, "w");
433 result = json_dumpf(json, output, flags);
439 int json_dump_callback(const json_t *json, json_dump_callback_t callback, void *data, size_t flags)
441 if(!(flags & JSON_ENCODE_ANY)) {
442 if(!json_is_array(json) && !json_is_object(json))
446 return do_dump(json, flags, 0, callback, data);