2 * Copyright (C) 2010-2012 Felix Fietkau <nbd@openwrt.org>
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 #include "blobmsg_json.h"
23 #include <json/json.h>
26 bool blobmsg_add_object(struct blob_buf *b, json_object *obj)
28 json_object_object_foreach(obj, key, val) {
29 if (!blobmsg_add_json_element(b, key, val))
35 static bool blobmsg_add_array(struct blob_buf *b, struct array_list *a)
39 for (i = 0, len = array_list_length(a); i < len; i++) {
40 if (!blobmsg_add_json_element(b, NULL, array_list_get_idx(a, i)))
47 bool blobmsg_add_json_element(struct blob_buf *b, const char *name, json_object *obj)
52 switch (json_object_get_type(obj)) {
53 case json_type_object:
54 c = blobmsg_open_table(b, name);
55 ret = blobmsg_add_object(b, obj);
56 blobmsg_close_table(b, c);
59 c = blobmsg_open_array(b, name);
60 ret = blobmsg_add_array(b, json_object_get_array(obj));
61 blobmsg_close_array(b, c);
63 case json_type_string:
64 blobmsg_add_string(b, name, json_object_get_string(obj));
66 case json_type_boolean:
67 blobmsg_add_u8(b, name, json_object_get_boolean(obj));
70 blobmsg_add_u32(b, name, json_object_get_int(obj));
72 case json_type_double:
73 blobmsg_add_double(b, name, json_object_get_double(obj));
76 blobmsg_add_field(b, BLOBMSG_TYPE_UNSPEC, name, NULL, 0);
84 static bool __blobmsg_add_json(struct blob_buf *b, json_object *obj)
91 if (json_object_get_type(obj) != json_type_object)
94 ret = blobmsg_add_object(b, obj);
101 bool blobmsg_add_json_from_file(struct blob_buf *b, const char *file)
103 return __blobmsg_add_json(b, json_object_from_file(file));
106 bool blobmsg_add_json_from_string(struct blob_buf *b, const char *str)
108 return __blobmsg_add_json(b, json_tokener_parse(str));
117 blobmsg_json_format_t custom_format;
123 static bool blobmsg_puts(struct strbuf *s, const char *c, int len)
131 if (s->pos + len >= s->len) {
132 new_len = s->len + 16 + len;
133 new_buf = realloc(s->buf, new_len);
141 memcpy(s->buf + s->pos, c, len);
146 static void add_separator(struct strbuf *s)
148 const char *indent_chars = "\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
154 len = s->indent_level + 1;
155 if (len > strlen(indent_chars))
156 len = strlen(indent_chars);
158 blobmsg_puts(s, indent_chars, len);
162 static void blobmsg_format_string(struct strbuf *s, const char *str)
164 const unsigned char *p, *last, *end;
165 char buf[8] = "\\u00";
167 end = (unsigned char *) str + strlen(str);
168 blobmsg_puts(s, "\"", 1);
169 for (p = (unsigned char *) str, last = p; *p; p++) {
201 blobmsg_puts(s, (char *) last, p - last);
206 sprintf(buf + 4, "%02x", (unsigned char) *p);
211 blobmsg_puts(s, buf, len);
214 blobmsg_puts(s, (char *) last, end - last);
215 blobmsg_puts(s, "\"", 1);
218 static void blobmsg_format_json_list(struct strbuf *s, struct blob_attr *attr, int len, bool array);
220 static void blobmsg_format_element(struct strbuf *s, struct blob_attr *attr, bool without_name, bool head)
222 const char *data_str;
227 if (!blobmsg_check_attr(attr, false))
230 if (!without_name && blobmsg_name(attr)[0]) {
231 blobmsg_format_string(s, blobmsg_name(attr));
232 blobmsg_puts(s, ": ", s->indent ? 2 : 1);
235 data = blobmsg_data(attr);
236 len = blobmsg_data_len(attr);
238 if (!head && s->custom_format) {
239 data_str = s->custom_format(s->priv, attr);
245 switch(blob_id(attr)) {
246 case BLOBMSG_TYPE_UNSPEC:
247 sprintf(buf, "null");
249 case BLOBMSG_TYPE_BOOL:
250 sprintf(buf, "%s", *(uint8_t *)data ? "true" : "false");
252 case BLOBMSG_TYPE_INT16:
253 sprintf(buf, "%d", be16_to_cpu(*(uint16_t *)data));
255 case BLOBMSG_TYPE_INT32:
256 sprintf(buf, "%d", (int32_t) be32_to_cpu(*(uint32_t *)data));
258 case BLOBMSG_TYPE_INT64:
259 sprintf(buf, "%" PRId64, (int64_t) be64_to_cpu(*(uint64_t *)data));
261 case BLOBMSG_TYPE_DOUBLE:
262 sprintf(buf, "%lf", blobmsg_get_double(attr));
264 case BLOBMSG_TYPE_STRING:
265 blobmsg_format_string(s, data);
267 case BLOBMSG_TYPE_ARRAY:
268 blobmsg_format_json_list(s, data, len, true);
270 case BLOBMSG_TYPE_TABLE:
271 blobmsg_format_json_list(s, data, len, false);
276 blobmsg_puts(s, data_str, strlen(data_str));
279 static void blobmsg_format_json_list(struct strbuf *s, struct blob_attr *attr, int len, bool array)
281 struct blob_attr *pos;
285 blobmsg_puts(s, (array ? "[" : "{" ), 1);
288 __blob_for_each_attr(pos, attr, rem) {
290 blobmsg_puts(s, ",", 1);
294 blobmsg_format_element(s, pos, array, false);
299 blobmsg_puts(s, (array ? "]" : "}"), 1);
302 static void setup_strbuf(struct strbuf *s, struct blob_attr *attr, blobmsg_json_format_t cb, void *priv, int indent)
304 s->len = blob_len(attr);
305 s->buf = malloc(s->len);
307 s->custom_format = cb;
313 s->indent_level = indent;
317 char *blobmsg_format_json_with_cb(struct blob_attr *attr, bool list, blobmsg_json_format_t cb, void *priv, int indent)
323 setup_strbuf(&s, attr, cb, priv, indent);
327 array = blob_is_extended(attr) &&
328 blobmsg_type(attr) == BLOBMSG_TYPE_ARRAY;
331 blobmsg_format_json_list(&s, blobmsg_data(attr), blobmsg_data_len(attr), array);
333 blobmsg_format_element(&s, attr, false, false);
340 ret = realloc(s.buf, s.pos + 1);
351 char *blobmsg_format_json_value_with_cb(struct blob_attr *attr, blobmsg_json_format_t cb, void *priv, int indent)
356 setup_strbuf(&s, attr, cb, priv, indent);
360 blobmsg_format_element(&s, attr, true, false);
367 ret = realloc(s.buf, s.pos + 1);