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.
14 #include "jansson_private.h"
15 #include "strbuffer.h"
17 #define MAX_INTEGER_STR_LENGTH 100
18 #define MAX_REAL_STR_LENGTH 100
20 typedef int (*dump_func)(const char *buffer, int size, void *data);
29 static int dump_to_strbuffer(const char *buffer, int size, void *data)
31 return strbuffer_append_bytes((strbuffer_t *)data, buffer, size);
34 static int dump_to_file(const char *buffer, int size, void *data)
36 FILE *dest = (FILE *)data;
37 if(fwrite(buffer, size, 1, dest) != 1)
42 /* 256 spaces (the maximum indentation size) */
43 static char whitespace[] = " ";
45 static int dump_indent(unsigned long flags, int depth, int space, dump_func dump, void *data)
47 if(JSON_INDENT(flags) > 0)
49 int i, ws_count = JSON_INDENT(flags);
51 if(dump("\n", 1, data))
54 for(i = 0; i < depth; i++)
56 if(dump(whitespace, ws_count, data))
60 else if(space && !(flags & JSON_COMPACT))
62 return dump(" ", 1, data);
67 static int dump_string(const char *str, dump_func dump, void *data)
71 if(dump("\"", 1, data))
81 while(*end && *end != '\\' && *end != '"' && (unsigned char)*end > 0x1F)
85 if(dump(str, end - str, data))
92 /* handle \, ", and control codes */
96 case '\\': text = "\\\\"; break;
97 case '\"': text = "\\\""; break;
98 case '\b': text = "\\b"; break;
99 case '\f': text = "\\f"; break;
100 case '\n': text = "\\n"; break;
101 case '\r': text = "\\r"; break;
102 case '\t': text = "\\t"; break;
105 sprintf(seq, "\\u00%02x", *end);
112 if(dump(text, length, data))
119 return dump("\"", 1, data);
122 static int do_dump(const json_t *json, unsigned long flags, int depth,
123 dump_func dump, void *data)
125 switch(json_typeof(json)) {
127 return dump("null", 4, data);
130 return dump("true", 4, data);
133 return dump("false", 5, data);
137 char buffer[MAX_INTEGER_STR_LENGTH];
140 size = snprintf(buffer, MAX_INTEGER_STR_LENGTH, "%d", json_integer_value(json));
141 if(size >= MAX_INTEGER_STR_LENGTH)
144 return dump(buffer, size, data);
149 char buffer[MAX_REAL_STR_LENGTH];
152 size = snprintf(buffer, MAX_REAL_STR_LENGTH, "%0.17f", json_real_value(json));
153 if(size >= MAX_REAL_STR_LENGTH)
156 return dump(buffer, size, data);
160 return dump_string(json_string_value(json), dump, data);
168 /* detect circular references */
169 array = json_to_array(json);
174 n = json_array_size(json);
176 if(dump("[", 1, data))
179 return dump("]", 1, data);
180 if(dump_indent(flags, depth + 1, 0, dump, data))
183 for(i = 0; i < n; ++i) {
184 if(do_dump(json_array_get(json, i), flags, depth + 1,
190 if(dump(",", 1, data) ||
191 dump_indent(flags, depth + 1, 1, dump, data))
196 if(dump_indent(flags, depth, 0, dump, data))
202 return dump("]", 1, data);
207 json_object_t *object;
209 const char *separator;
210 int separator_length;
212 if(flags & JSON_COMPACT) {
214 separator_length = 1;
218 separator_length = 2;
221 /* detect circular references */
222 object = json_to_object(json);
227 iter = json_object_iter((json_t *)json);
229 if(dump("{", 1, data))
232 return dump("}", 1, data);
233 if(dump_indent(flags, depth + 1, 0, dump, data))
238 void *next = json_object_iter_next((json_t *)json, iter);
240 dump_string(json_object_iter_key(iter), dump, data);
241 if(dump(separator, separator_length, data) ||
242 do_dump(json_object_iter_value(iter), flags, depth + 1,
248 if(dump(",", 1, data) ||
249 dump_indent(flags, depth + 1, 1, dump, data))
254 if(dump_indent(flags, depth, 0, dump, data))
262 return dump("}", 1, data);
272 char *json_dumps(const json_t *json, unsigned long flags)
277 if(!json_is_array(json) && !json_is_object(json))
280 if(strbuffer_init(&strbuff))
283 if(do_dump(json, flags, 0, dump_to_strbuffer, (void *)&strbuff)) {
284 strbuffer_close(&strbuff);
288 result = strdup(strbuffer_value(&strbuff));
289 strbuffer_close(&strbuff);
294 int json_dumpf(const json_t *json, FILE *output, unsigned long flags)
296 if(!json_is_array(json) && !json_is_object(json))
299 return do_dump(json, flags, 0, dump_to_file, (void *)output);
302 int json_dump_file(const json_t *json, const char *path, unsigned long flags)
306 FILE *output = fopen(path, "w");
310 result = json_dumpf(json, output, flags);