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 "strbuffer.h"
16 #define MAX_INTEGER_STR_LENGTH 100
17 #define MAX_REAL_STR_LENGTH 100
19 typedef int (*dump_func)(const char *buffer, int size, void *data);
28 static int dump_to_strbuffer(const char *buffer, int size, void *data)
30 return strbuffer_append_bytes((strbuffer_t *)data, buffer, size);
33 static int dump_to_file(const char *buffer, int size, void *data)
35 FILE *dest = (FILE *)data;
36 if(fwrite(buffer, size, 1, dest) != 1)
41 /* 256 spaces (the maximum indentation size) */
42 static char whitespace[] = " ";
44 static int dump_indent(unsigned long flags, int depth, dump_func dump, void *data)
46 if(JSON_INDENT(flags) > 0)
48 int i, ws_count = JSON_INDENT(flags);
50 if(dump("\n", 1, data))
53 for(i = 0; i < depth; i++)
55 if(dump(whitespace, ws_count, data))
62 static int dump_string(const char *str, dump_func dump, void *data)
66 if(dump("\"", 1, data))
76 while(*end && *end != '\\' && *end != '"' && (unsigned char)*end > 0x1F)
80 if(dump(str, end - str, data))
87 /* handle \, ", and control codes */
91 case '\\': text = "\\\\"; break;
92 case '\"': text = "\\\""; break;
93 case '\b': text = "\\b"; break;
94 case '\f': text = "\\f"; break;
95 case '\n': text = "\\n"; break;
96 case '\r': text = "\\r"; break;
97 case '\t': text = "\\t"; break;
100 sprintf(seq, "\\u00%02x", *end);
107 if(dump(text, length, data))
114 return dump("\"", 1, data);
117 static int do_dump(const json_t *json, unsigned long flags, int depth,
118 dump_func dump, void *data)
120 switch(json_typeof(json)) {
122 return dump("null", 4, data);
125 return dump("true", 4, data);
128 return dump("false", 5, data);
132 char buffer[MAX_INTEGER_STR_LENGTH];
135 size = snprintf(buffer, MAX_INTEGER_STR_LENGTH, "%d", json_integer_value(json));
136 if(size >= MAX_INTEGER_STR_LENGTH)
139 return dump(buffer, size, data);
144 char buffer[MAX_REAL_STR_LENGTH];
147 size = snprintf(buffer, MAX_REAL_STR_LENGTH, "%0.17f", json_real_value(json));
148 if(size >= MAX_REAL_STR_LENGTH)
151 return dump(buffer, size, data);
155 return dump_string(json_string_value(json), dump, data);
160 int n = json_array_size(json);
162 if(dump("[", 1, data))
165 return dump("]", 1, data);
166 if(dump_indent(flags, depth + 1, dump, data))
169 for(i = 0; i < n; ++i) {
170 if(do_dump(json_array_get(json, i), flags, depth + 1,
176 if(dump(",", 1, data) ||
177 dump_indent(flags, depth + 1, dump, data))
182 if(dump_indent(flags, depth, dump, data))
186 return dump("]", 1, data);
191 void *iter = json_object_iter((json_t *)json);
193 if(dump("{", 1, data))
196 return dump("}", 1, data);
197 if(dump_indent(flags, depth + 1, dump, data))
202 void *next = json_object_iter_next((json_t *)json, iter);
204 dump_string(json_object_iter_key(iter), dump, data);
205 if(dump(": ", 2, data) ||
206 do_dump(json_object_iter_value(iter), flags, depth + 1,
212 if(dump(",", 1, data) ||
213 dump_indent(flags, depth + 1, dump, data))
218 if(dump_indent(flags, depth, dump, data))
224 return dump("}", 1, data);
234 char *json_dumps(const json_t *json, unsigned long flags)
239 if(!json_is_array(json) && !json_is_object(json))
242 if(strbuffer_init(&strbuff))
245 if(do_dump(json, flags, 0, dump_to_strbuffer, (void *)&strbuff)) {
246 strbuffer_close(&strbuff);
250 if(dump_to_strbuffer("\n", 1, (void *)&strbuff)) {
251 strbuffer_close(&strbuff);
255 result = strdup(strbuffer_value(&strbuff));
256 strbuffer_close(&strbuff);
261 int json_dumpf(const json_t *json, FILE *output, unsigned long flags)
263 if(!json_is_array(json) && !json_is_object(json))
266 if(do_dump(json, flags, 0, dump_to_file, (void *)output))
268 return dump_to_file("\n", 1, (void *)output);
271 int json_dump_file(const json_t *json, const char *path, unsigned long flags)
275 FILE *output = fopen(path, "w");
279 result = json_dumpf(json, output, flags);