2 * Copyright (c) 2009 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"
18 #define MAX_INTEGER_STR_LENGTH 100
19 #define MAX_REAL_STR_LENGTH 100
21 typedef int (*dump_func)(const char *buffer, int size, void *data);
30 static int dump_to_strbuffer(const char *buffer, int size, void *data)
32 return strbuffer_append_bytes((strbuffer_t *)data, buffer, size);
35 static int dump_to_file(const char *buffer, int size, void *data)
37 FILE *dest = (FILE *)data;
38 if(fwrite(buffer, size, 1, dest) != 1)
43 /* 256 spaces (the maximum indentation size) */
44 static char whitespace[] = " ";
46 static int dump_indent(unsigned long flags, int depth, int space, dump_func dump, void *data)
48 if(JSON_INDENT(flags) > 0)
50 int i, ws_count = JSON_INDENT(flags);
52 if(dump("\n", 1, data))
55 for(i = 0; i < depth; i++)
57 if(dump(whitespace, ws_count, data))
61 else if(space && !(flags & JSON_COMPACT))
63 return dump(" ", 1, data);
68 static int dump_string(const char *str, dump_func dump, void *data)
72 if(dump("\"", 1, data))
82 while(*end && *end != '\\' && *end != '"' && (unsigned char)*end > 0x1F)
86 if(dump(str, end - str, data))
93 /* handle \, ", and control codes */
97 case '\\': text = "\\\\"; break;
98 case '\"': text = "\\\""; break;
99 case '\b': text = "\\b"; break;
100 case '\f': text = "\\f"; break;
101 case '\n': text = "\\n"; break;
102 case '\r': text = "\\r"; break;
103 case '\t': text = "\\t"; break;
106 sprintf(seq, "\\u00%02x", *end);
113 if(dump(text, length, data))
120 return dump("\"", 1, data);
123 static int do_dump(const json_t *json, unsigned long flags, int depth,
124 dump_func dump, void *data)
126 switch(json_typeof(json)) {
128 return dump("null", 4, data);
131 return dump("true", 4, data);
134 return dump("false", 5, data);
138 char buffer[MAX_INTEGER_STR_LENGTH];
141 size = snprintf(buffer, MAX_INTEGER_STR_LENGTH, "%d", json_integer_value(json));
142 if(size >= MAX_INTEGER_STR_LENGTH)
145 return dump(buffer, size, data);
150 char buffer[MAX_REAL_STR_LENGTH];
153 size = snprintf(buffer, MAX_REAL_STR_LENGTH, "%0.17f", json_real_value(json));
154 if(size >= MAX_REAL_STR_LENGTH)
157 return dump(buffer, size, data);
161 return dump_string(json_string_value(json), dump, data);
169 /* detect circular references */
170 array = json_to_array(json);
175 n = json_array_size(json);
177 if(dump("[", 1, data))
180 return dump("]", 1, data);
181 if(dump_indent(flags, depth + 1, 0, dump, data))
184 for(i = 0; i < n; ++i) {
185 if(do_dump(json_array_get(json, i), flags, depth + 1,
191 if(dump(",", 1, data) ||
192 dump_indent(flags, depth + 1, 1, dump, data))
197 if(dump_indent(flags, depth, 0, dump, data))
203 return dump("]", 1, data);
208 json_object_t *object;
210 const char *separator;
211 int separator_length;
213 if(flags & JSON_COMPACT) {
215 separator_length = 1;
219 separator_length = 2;
222 /* detect circular references */
223 object = json_to_object(json);
228 iter = json_object_iter((json_t *)json);
230 if(dump("{", 1, data))
233 return dump("}", 1, data);
234 if(dump_indent(flags, depth + 1, 0, dump, data))
239 void *next = json_object_iter_next((json_t *)json, iter);
241 dump_string(json_object_iter_key(iter), dump, data);
242 if(dump(separator, separator_length, data) ||
243 do_dump(json_object_iter_value(iter), flags, depth + 1,
249 if(dump(",", 1, data) ||
250 dump_indent(flags, depth + 1, 1, dump, data))
255 if(dump_indent(flags, depth, 0, dump, data))
263 return dump("}", 1, data);
273 char *json_dumps(const json_t *json, unsigned long flags)
278 if(!json_is_array(json) && !json_is_object(json))
281 if(strbuffer_init(&strbuff))
284 if(do_dump(json, flags, 0, dump_to_strbuffer, (void *)&strbuff)) {
285 strbuffer_close(&strbuff);
289 result = strdup(strbuffer_value(&strbuff));
290 strbuffer_close(&strbuff);
295 int json_dumpf(const json_t *json, FILE *output, unsigned long flags)
297 if(!json_is_array(json) && !json_is_object(json))
300 return do_dump(json, flags, 0, dump_to_file, (void *)output);
303 int json_dump_file(const json_t *json, const char *path, unsigned long flags)
307 FILE *output = fopen(path, "w");
311 result = json_dumpf(json, output, flags);