2 * blobmsg - library for generating/parsing structured blob messages
4 * Copyright (C) 2010 Felix Fietkau <nbd@openwrt.org>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU Lesser General Public License version 2.1
8 * as published by the Free Software Foundation
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
17 #include "blobmsg_json.h"
19 static bool blobmsg_add_object(struct blob_buf *b, json_object *obj)
21 json_object_object_foreach(obj, key, val) {
22 if (!blobmsg_add_json_element(b, key, val))
28 static bool blobmsg_add_array(struct blob_buf *b, struct array_list *a)
32 for (i = 0, len = array_list_length(a); i < len; i++) {
33 if (!blobmsg_add_json_element(b, NULL, array_list_get_idx(a, i)))
40 bool blobmsg_add_json_element(struct blob_buf *b, const char *name, json_object *obj)
48 switch (json_object_get_type(obj)) {
49 case json_type_object:
50 c = blobmsg_open_table(b, name);
51 ret = blobmsg_add_object(b, obj);
52 blobmsg_close_table(b, c);
55 c = blobmsg_open_array(b, name);
56 ret = blobmsg_add_array(b, json_object_get_array(obj));
57 blobmsg_close_array(b, c);
59 case json_type_string:
60 blobmsg_add_string(b, name, json_object_get_string(obj));
62 case json_type_boolean:
63 blobmsg_add_u8(b, name, json_object_get_boolean(obj));
66 blobmsg_add_u32(b, name, json_object_get_int(obj));
74 bool blobmsg_add_json_from_string(struct blob_buf *b, const char *str)
79 obj = json_tokener_parse(str);
83 if (json_object_get_type(obj) != json_type_object)
86 ret = blobmsg_add_object(b, obj);
99 blobmsg_json_format_t custom_format;
103 static bool blobmsg_puts(struct strbuf *s, const char *c, int len)
108 if (s->pos + len >= s->len) {
110 s->buf = realloc(s->buf, s->len);
114 memcpy(s->buf + s->pos, c, len);
119 static void blobmsg_format_string(struct strbuf *s, const char *str)
121 const char *p, *last = str, *end = str + strlen(str);
122 char buf[8] = "\\u00";
124 blobmsg_puts(s, "\"", 1);
125 for (p = str; *p; p++) {
157 blobmsg_puts(s, last, p - last);
162 sprintf(buf + 4, "%02x", (unsigned char) *p);
167 blobmsg_puts(s, buf, len);
170 blobmsg_puts(s, last, end - last);
171 blobmsg_puts(s, "\"", 1);
174 static void blobmsg_format_json_list(struct strbuf *s, struct blob_attr *attr, int len, bool array);
176 static void blobmsg_format_element(struct strbuf *s, struct blob_attr *attr, bool array, bool head)
178 const char *data_str;
183 if (!blobmsg_check_attr(attr, false))
186 if (!array && blobmsg_name(attr)[0]) {
187 blobmsg_format_string(s, blobmsg_name(attr));
188 blobmsg_puts(s, ":", 1);
191 data = blob_data(attr);
192 len = blob_len(attr);
194 data = blobmsg_data(attr);
195 len = blobmsg_data_len(attr);
197 if (s->custom_format) {
198 data_str = s->custom_format(s->priv, attr);
205 switch(blob_id(attr)) {
206 case BLOBMSG_TYPE_INT8:
207 sprintf(buf, "%s", *(uint8_t *)data ? "true" : "false");
209 case BLOBMSG_TYPE_INT32:
210 sprintf(buf, "%d", *(uint32_t *)data);
212 case BLOBMSG_TYPE_INT64:
213 sprintf(buf, "%lld", (long long int) *(uint64_t *)data);
215 case BLOBMSG_TYPE_STRING:
216 blobmsg_format_string(s, data);
218 case BLOBMSG_TYPE_ARRAY:
219 blobmsg_format_json_list(s, data, len, true);
221 case BLOBMSG_TYPE_TABLE:
222 blobmsg_format_json_list(s, data, len, false);
227 blobmsg_puts(s, data_str, strlen(data_str));
230 static void blobmsg_format_json_list(struct strbuf *s, struct blob_attr *attr, int len, bool array)
232 struct blob_attr *pos;
236 blobmsg_puts(s, (array ? "[ " : "{ "), 2);
237 __blob_for_each_attr(pos, attr, rem) {
239 blobmsg_puts(s, ", ", 2);
241 blobmsg_format_element(s, pos, array, false);
244 blobmsg_puts(s, (array ? " ]" : " }"), 2);
247 char *blobmsg_format_json_with_cb(struct blob_attr *attr, bool list, blobmsg_json_format_t cb, void *priv)
251 s.len = blob_len(attr);
252 s.buf = malloc(s.len);
254 s.custom_format = cb;
258 blobmsg_format_json_list(&s, blob_data(attr), blob_len(attr), false);
260 blobmsg_format_element(&s, attr, false, false);
265 s.buf = realloc(s.buf, s.pos + 1);