2 * Copyright (c) 2009-2011 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
22 typedef int (*dump_func)(const char *buffer, int size, void *data);
31 static int dump_to_strbuffer(const char *buffer, int size, void *data)
33 return strbuffer_append_bytes((strbuffer_t *)data, buffer, size);
36 static int dump_to_file(const char *buffer, int size, void *data)
38 FILE *dest = (FILE *)data;
39 if(fwrite(buffer, size, 1, dest) != 1)
44 /* 32 spaces (the maximum indentation size) */
45 static char whitespace[] = " ";
47 static int dump_indent(size_t flags, int depth, int space, dump_func dump, void *data)
49 if(JSON_INDENT(flags) > 0)
51 int i, ws_count = JSON_INDENT(flags);
53 if(dump("\n", 1, data))
56 for(i = 0; i < depth; i++)
58 if(dump(whitespace, ws_count, data))
62 else if(space && !(flags & JSON_COMPACT))
64 return dump(" ", 1, data);
69 static int dump_string(const char *str, int ascii, dump_func dump, void *data)
71 const char *pos, *end;
74 if(dump("\"", 1, data))
86 end = utf8_iterate(pos, &codepoint);
90 /* mandatory escape or control char */
91 if(codepoint == '\\' || codepoint == '"' || codepoint < 0x20)
95 if(ascii && codepoint > 0x7F)
102 if(dump(str, pos - str, data))
109 /* handle \, ", and control codes */
113 case '\\': text = "\\\\"; break;
114 case '\"': text = "\\\""; break;
115 case '\b': text = "\\b"; break;
116 case '\f': text = "\\f"; break;
117 case '\n': text = "\\n"; break;
118 case '\r': text = "\\r"; break;
119 case '\t': text = "\\t"; break;
122 /* codepoint is in BMP */
123 if(codepoint < 0x10000)
125 sprintf(seq, "\\u%04x", codepoint);
129 /* not in BMP -> construct a UTF-16 surrogate pair */
134 codepoint -= 0x10000;
135 first = 0xD800 | ((codepoint & 0xffc00) >> 10);
136 last = 0xDC00 | (codepoint & 0x003ff);
138 sprintf(seq, "\\u%04x\\u%04x", first, last);
147 if(dump(text, length, data))
153 return dump("\"", 1, data);
156 static int object_key_compare_keys(const void *key1, const void *key2)
158 return strcmp((*(const object_key_t **)key1)->key,
159 (*(const object_key_t **)key2)->key);
162 static int object_key_compare_serials(const void *key1, const void *key2)
164 return (*(const object_key_t **)key1)->serial -
165 (*(const object_key_t **)key2)->serial;
168 static int do_dump(const json_t *json, size_t flags, int depth,
169 dump_func dump, void *data)
171 int ascii = flags & JSON_ENSURE_ASCII ? 1 : 0;
173 switch(json_typeof(json)) {
175 return dump("null", 4, data);
178 return dump("true", 4, data);
181 return dump("false", 5, data);
185 char buffer[MAX_INTEGER_STR_LENGTH];
188 size = snprintf(buffer, MAX_INTEGER_STR_LENGTH,
189 "%" JSON_INTEGER_FORMAT,
190 json_integer_value(json));
191 if(size >= MAX_INTEGER_STR_LENGTH)
194 return dump(buffer, size, data);
199 char buffer[MAX_REAL_STR_LENGTH];
202 size = snprintf(buffer, MAX_REAL_STR_LENGTH, "%.17g",
203 json_real_value(json));
204 if(size >= MAX_REAL_STR_LENGTH)
207 /* Make sure there's a dot or 'e' in the output. Otherwise
208 a real is converted to an integer when decoding */
209 if(strchr(buffer, '.') == NULL &&
210 strchr(buffer, 'e') == NULL)
212 if(size + 2 >= MAX_REAL_STR_LENGTH) {
213 /* No space to append ".0" */
217 buffer[size + 1] = '0';
221 return dump(buffer, size, data);
225 return dump_string(json_string_value(json), ascii, dump, data);
233 /* detect circular references */
234 array = json_to_array(json);
239 n = json_array_size(json);
241 if(dump("[", 1, data))
245 return dump("]", 1, data);
247 if(dump_indent(flags, depth + 1, 0, dump, data))
250 for(i = 0; i < n; ++i) {
251 if(do_dump(json_array_get(json, i), flags, depth + 1,
257 if(dump(",", 1, data) ||
258 dump_indent(flags, depth + 1, 1, dump, data))
263 if(dump_indent(flags, depth, 0, dump, data))
269 return dump("]", 1, data);
278 json_object_t *object;
280 const char *separator;
281 int separator_length;
283 if(flags & JSON_COMPACT) {
285 separator_length = 1;
289 separator_length = 2;
292 /* detect circular references */
293 object = json_to_object(json);
298 iter = json_object_iter((json_t *)json);
300 if(dump("{", 1, data))
304 return dump("}", 1, data);
306 if(dump_indent(flags, depth + 1, 0, dump, data))
309 if(flags & JSON_SORT_KEYS || flags & JSON_PRESERVE_ORDER)
311 const object_key_t **keys;
313 int (*cmp_func)(const void *, const void *);
315 size = json_object_size(json);
316 keys = jsonp_malloc(size * sizeof(object_key_t *));
323 keys[i] = jsonp_object_iter_fullkey(iter);
324 iter = json_object_iter_next((json_t *)json, iter);
329 if(flags & JSON_SORT_KEYS)
330 cmp_func = object_key_compare_keys;
332 cmp_func = object_key_compare_serials;
334 qsort(keys, size, sizeof(object_key_t *), cmp_func);
336 for(i = 0; i < size; i++)
342 value = json_object_get(json, key);
345 dump_string(key, ascii, dump, data);
346 if(dump(separator, separator_length, data) ||
347 do_dump(value, flags, depth + 1, dump, data))
355 if(dump(",", 1, data) ||
356 dump_indent(flags, depth + 1, 1, dump, data))
364 if(dump_indent(flags, depth, 0, dump, data))
376 /* Don't sort keys */
380 void *next = json_object_iter_next((json_t *)json, iter);
382 dump_string(json_object_iter_key(iter), ascii, dump, data);
383 if(dump(separator, separator_length, data) ||
384 do_dump(json_object_iter_value(iter), flags, depth + 1,
390 if(dump(",", 1, data) ||
391 dump_indent(flags, depth + 1, 1, dump, data))
396 if(dump_indent(flags, depth, 0, dump, data))
405 return dump("}", 1, data);
419 char *json_dumps(const json_t *json, size_t flags)
424 if(!json_is_array(json) && !json_is_object(json))
427 if(strbuffer_init(&strbuff))
430 if(do_dump(json, flags, 0, dump_to_strbuffer, (void *)&strbuff)) {
431 strbuffer_close(&strbuff);
435 result = jsonp_strdup(strbuffer_value(&strbuff));
436 strbuffer_close(&strbuff);
441 int json_dumpf(const json_t *json, FILE *output, size_t flags)
443 if(!json_is_array(json) && !json_is_object(json))
446 return do_dump(json, flags, 0, dump_to_file, (void *)output);
449 int json_dump_file(const json_t *json, const char *path, size_t flags)
453 FILE *output = fopen(path, "w");
457 result = json_dumpf(json, output, flags);