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, 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))
63 static int dump_string(const char *str, dump_func dump, void *data)
67 if(dump("\"", 1, data))
77 while(*end && *end != '\\' && *end != '"' && (unsigned char)*end > 0x1F)
81 if(dump(str, end - str, data))
88 /* handle \, ", and control codes */
92 case '\\': text = "\\\\"; break;
93 case '\"': text = "\\\""; break;
94 case '\b': text = "\\b"; break;
95 case '\f': text = "\\f"; break;
96 case '\n': text = "\\n"; break;
97 case '\r': text = "\\r"; break;
98 case '\t': text = "\\t"; break;
101 sprintf(seq, "\\u00%02x", *end);
108 if(dump(text, length, data))
115 return dump("\"", 1, data);
118 static int do_dump(const json_t *json, unsigned long flags, int depth,
119 dump_func dump, void *data)
121 switch(json_typeof(json)) {
123 return dump("null", 4, data);
126 return dump("true", 4, data);
129 return dump("false", 5, data);
133 char buffer[MAX_INTEGER_STR_LENGTH];
136 size = snprintf(buffer, MAX_INTEGER_STR_LENGTH, "%d", json_integer_value(json));
137 if(size >= MAX_INTEGER_STR_LENGTH)
140 return dump(buffer, size, data);
145 char buffer[MAX_REAL_STR_LENGTH];
148 size = snprintf(buffer, MAX_REAL_STR_LENGTH, "%0.17f", json_real_value(json));
149 if(size >= MAX_REAL_STR_LENGTH)
152 return dump(buffer, size, data);
156 return dump_string(json_string_value(json), dump, data);
164 /* detect circular references */
165 array = json_to_array(json);
170 n = json_array_size(json);
172 if(dump("[", 1, data))
175 return dump("]", 1, data);
176 if(dump_indent(flags, depth + 1, dump, data))
179 for(i = 0; i < n; ++i) {
180 if(do_dump(json_array_get(json, i), flags, depth + 1,
186 if(dump(",", 1, data) ||
187 dump_indent(flags, depth + 1, dump, data))
192 if(dump_indent(flags, depth, dump, data))
198 return dump("]", 1, data);
203 json_object_t *object;
206 /* detect circular references */
207 object = json_to_object(json);
212 iter = json_object_iter((json_t *)json);
214 if(dump("{", 1, data))
217 return dump("}", 1, data);
218 if(dump_indent(flags, depth + 1, dump, data))
223 void *next = json_object_iter_next((json_t *)json, iter);
225 dump_string(json_object_iter_key(iter), dump, data);
226 if(dump(": ", 2, data) ||
227 do_dump(json_object_iter_value(iter), flags, depth + 1,
233 if(dump(",", 1, data) ||
234 dump_indent(flags, depth + 1, dump, data))
239 if(dump_indent(flags, depth, dump, data))
247 return dump("}", 1, data);
257 char *json_dumps(const json_t *json, unsigned long flags)
262 if(!json_is_array(json) && !json_is_object(json))
265 if(strbuffer_init(&strbuff))
268 if(do_dump(json, flags, 0, dump_to_strbuffer, (void *)&strbuff)) {
269 strbuffer_close(&strbuff);
273 if(dump_to_strbuffer("\n", 1, (void *)&strbuff)) {
274 strbuffer_close(&strbuff);
278 result = strdup(strbuffer_value(&strbuff));
279 strbuffer_close(&strbuff);
284 int json_dumpf(const json_t *json, FILE *output, unsigned long flags)
286 if(!json_is_array(json) && !json_is_object(json))
289 if(do_dump(json, flags, 0, dump_to_file, (void *)output))
291 return dump_to_file("\n", 1, (void *)output);
294 int json_dump_file(const json_t *json, const char *path, unsigned long flags)
298 FILE *output = fopen(path, "w");
302 result = json_dumpf(json, output, flags);