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));
73 blobmsg_add_field(b, BLOBMSG_TYPE_UNSPEC, name, NULL, 0);
81 static bool __blobmsg_add_json(struct blob_buf *b, json_object *obj)
88 if (json_object_get_type(obj) != json_type_object)
91 ret = blobmsg_add_object(b, obj);
98 bool blobmsg_add_json_from_file(struct blob_buf *b, const char *file)
100 return __blobmsg_add_json(b, json_object_from_file(file));
103 bool blobmsg_add_json_from_string(struct blob_buf *b, const char *str)
105 return __blobmsg_add_json(b, json_tokener_parse(str));
114 blobmsg_json_format_t custom_format;
120 static bool blobmsg_puts(struct strbuf *s, const char *c, int len)
128 if (s->pos + len >= s->len) {
129 new_len = s->len + 16 + len;
130 new_buf = realloc(s->buf, new_len);
138 memcpy(s->buf + s->pos, c, len);
143 static void add_separator(struct strbuf *s)
145 const char *indent_chars = "\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
151 len = s->indent_level + 1;
152 if (len > strlen(indent_chars))
153 len = strlen(indent_chars);
155 blobmsg_puts(s, indent_chars, len);
159 static void blobmsg_format_string(struct strbuf *s, const char *str)
161 const unsigned char *p, *last, *end;
162 char buf[8] = "\\u00";
164 end = (unsigned char *) str + strlen(str);
165 blobmsg_puts(s, "\"", 1);
166 for (p = (unsigned char *) str, last = p; *p; p++) {
198 blobmsg_puts(s, (char *) last, p - last);
203 sprintf(buf + 4, "%02x", (unsigned char) *p);
208 blobmsg_puts(s, buf, len);
211 blobmsg_puts(s, (char *) last, end - last);
212 blobmsg_puts(s, "\"", 1);
215 static void blobmsg_format_json_list(struct strbuf *s, struct blob_attr *attr, int len, bool array);
217 static void blobmsg_format_element(struct strbuf *s, struct blob_attr *attr, bool without_name, bool head)
219 const char *data_str;
224 if (!blobmsg_check_attr(attr, false))
227 if (!without_name && blobmsg_name(attr)[0]) {
228 blobmsg_format_string(s, blobmsg_name(attr));
229 blobmsg_puts(s, ": ", s->indent ? 2 : 1);
232 data = blobmsg_data(attr);
233 len = blobmsg_data_len(attr);
235 if (!head && s->custom_format) {
236 data_str = s->custom_format(s->priv, attr);
242 switch(blob_id(attr)) {
243 case BLOBMSG_TYPE_UNSPEC:
244 sprintf(buf, "null");
246 case BLOBMSG_TYPE_BOOL:
247 sprintf(buf, "%s", *(uint8_t *)data ? "true" : "false");
249 case BLOBMSG_TYPE_INT16:
250 sprintf(buf, "%d", be16_to_cpu(*(uint16_t *)data));
252 case BLOBMSG_TYPE_INT32:
253 sprintf(buf, "%d", (int32_t) be32_to_cpu(*(uint32_t *)data));
255 case BLOBMSG_TYPE_INT64:
256 sprintf(buf, "%" PRId64, (int64_t) be64_to_cpu(*(uint64_t *)data));
258 case BLOBMSG_TYPE_STRING:
259 blobmsg_format_string(s, data);
261 case BLOBMSG_TYPE_ARRAY:
262 blobmsg_format_json_list(s, data, len, true);
264 case BLOBMSG_TYPE_TABLE:
265 blobmsg_format_json_list(s, data, len, false);
270 blobmsg_puts(s, data_str, strlen(data_str));
273 static void blobmsg_format_json_list(struct strbuf *s, struct blob_attr *attr, int len, bool array)
275 struct blob_attr *pos;
279 blobmsg_puts(s, (array ? "[" : "{" ), 1);
282 __blob_for_each_attr(pos, attr, rem) {
284 blobmsg_puts(s, ",", 1);
288 blobmsg_format_element(s, pos, array, false);
293 blobmsg_puts(s, (array ? "]" : "}"), 1);
296 static void setup_strbuf(struct strbuf *s, struct blob_attr *attr, blobmsg_json_format_t cb, void *priv, int indent)
298 s->len = blob_len(attr);
299 s->buf = malloc(s->len);
301 s->custom_format = cb;
307 s->indent_level = indent;
311 char *blobmsg_format_json_with_cb(struct blob_attr *attr, bool list, blobmsg_json_format_t cb, void *priv, int indent)
317 setup_strbuf(&s, attr, cb, priv, indent);
321 array = blob_is_extended(attr) &&
322 blobmsg_type(attr) == BLOBMSG_TYPE_ARRAY;
325 blobmsg_format_json_list(&s, blobmsg_data(attr), blobmsg_data_len(attr), array);
327 blobmsg_format_element(&s, attr, false, false);
334 ret = realloc(s.buf, s.pos + 1);
345 char *blobmsg_format_json_value_with_cb(struct blob_attr *attr, blobmsg_json_format_t cb, void *priv, int indent)
350 setup_strbuf(&s, attr, cb, priv, indent);
354 blobmsg_format_element(&s, attr, true, false);
361 ret = realloc(s.buf, s.pos + 1);