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 int64_t i64
= json_object_get_int64(obj
);
71 if (i64
>= INT32_MIN
&& i64
<= INT32_MAX
) {
72 blobmsg_add_u32(b
, name
, (uint32_t)i64
);
74 blobmsg_add_u64(b
, name
, (uint64_t)i64
);
78 case json_type_double
:
79 blobmsg_add_double(b
, name
, json_object_get_double(obj
));
82 blobmsg_add_field(b
, BLOBMSG_TYPE_UNSPEC
, name
, NULL
, 0);
90 static bool __blobmsg_add_json(struct blob_buf
*b
, json_object
*obj
)
97 if (json_object_get_type(obj
) != json_type_object
)
100 ret
= blobmsg_add_object(b
, obj
);
103 json_object_put(obj
);
107 bool blobmsg_add_json_from_file(struct blob_buf
*b
, const char *file
)
109 return __blobmsg_add_json(b
, json_object_from_file(file
));
112 bool blobmsg_add_json_from_string(struct blob_buf
*b
, const char *str
)
114 return __blobmsg_add_json(b
, json_tokener_parse(str
));
123 blobmsg_json_format_t custom_format
;
129 static bool blobmsg_puts(struct strbuf
*s
, const char *c
, int len
)
137 if (s
->pos
+ len
>= s
->len
) {
138 new_len
= s
->len
+ 16 + len
;
139 new_buf
= realloc(s
->buf
, new_len
);
147 memcpy(s
->buf
+ s
->pos
, c
, len
);
152 static void add_separator(struct strbuf
*s
)
154 const char indent_chars
[] = "\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
160 len
= s
->indent_level
+ 1;
161 if (len
> sizeof(indent_chars
) - 1)
162 len
= sizeof(indent_chars
) - 1;
164 blobmsg_puts(s
, indent_chars
, len
);
168 static void blobmsg_format_string(struct strbuf
*s
, const char *str
)
170 const unsigned char *p
, *last
, *end
;
171 char buf
[8] = "\\u00";
173 end
= (unsigned char *) str
+ strlen(str
);
174 blobmsg_puts(s
, "\"", 1);
175 for (p
= (unsigned char *) str
, last
= p
; *p
; p
++) {
206 blobmsg_puts(s
, (char *) last
, p
- last
);
211 snprintf(buf
+ 4, sizeof(buf
) - 4, "%02x", (unsigned char) *p
);
216 blobmsg_puts(s
, buf
, len
);
219 blobmsg_puts(s
, (char *) last
, end
- last
);
220 blobmsg_puts(s
, "\"", 1);
223 static void blobmsg_format_json_list(struct strbuf
*s
, struct blob_attr
*attr
, int len
, bool array
);
225 static void blobmsg_format_element(struct strbuf
*s
, struct blob_attr
*attr
, bool without_name
, bool head
)
227 const char *data_str
;
232 if (!blobmsg_check_attr(attr
, false))
235 if (!without_name
&& blobmsg_name(attr
)[0]) {
236 blobmsg_format_string(s
, blobmsg_name(attr
));
237 blobmsg_puts(s
, ": ", s
->indent
? 2 : 1);
240 data
= blobmsg_data(attr
);
241 len
= blobmsg_data_len(attr
);
243 if (!head
&& s
->custom_format
) {
244 data_str
= s
->custom_format(s
->priv
, attr
);
250 switch(blob_id(attr
)) {
251 case BLOBMSG_TYPE_UNSPEC
:
252 snprintf(buf
, sizeof(buf
), "null");
254 case BLOBMSG_TYPE_BOOL
:
255 snprintf(buf
, sizeof(buf
), "%s", *(uint8_t *)data
? "true" : "false");
257 case BLOBMSG_TYPE_INT16
:
258 snprintf(buf
, sizeof(buf
), "%" PRId16
, (int16_t) be16_to_cpu(*(uint16_t *)data
));
260 case BLOBMSG_TYPE_INT32
:
261 snprintf(buf
, sizeof(buf
), "%" PRId32
, (int32_t) be32_to_cpu(*(uint32_t *)data
));
263 case BLOBMSG_TYPE_INT64
:
264 snprintf(buf
, sizeof(buf
), "%" PRId64
, (int64_t) be64_to_cpu(*(uint64_t *)data
));
266 case BLOBMSG_TYPE_DOUBLE
:
267 snprintf(buf
, sizeof(buf
), "%lf", blobmsg_get_double(attr
));
269 case BLOBMSG_TYPE_STRING
:
270 blobmsg_format_string(s
, data
);
272 case BLOBMSG_TYPE_ARRAY
:
273 blobmsg_format_json_list(s
, data
, len
, true);
275 case BLOBMSG_TYPE_TABLE
:
276 blobmsg_format_json_list(s
, data
, len
, false);
281 blobmsg_puts(s
, data_str
, strlen(data_str
));
284 static void blobmsg_format_json_list(struct strbuf
*s
, struct blob_attr
*attr
, int len
, bool array
)
286 struct blob_attr
*pos
;
290 blobmsg_puts(s
, (array
? "[" : "{" ), 1);
293 __blob_for_each_attr(pos
, attr
, rem
) {
295 blobmsg_puts(s
, ",", 1);
299 blobmsg_format_element(s
, pos
, array
, false);
304 blobmsg_puts(s
, (array
? "]" : "}"), 1);
307 static void setup_strbuf(struct strbuf
*s
, struct blob_attr
*attr
, blobmsg_json_format_t cb
, void *priv
, int indent
)
309 s
->len
= blob_len(attr
);
310 s
->buf
= malloc(s
->len
);
312 s
->custom_format
= cb
;
318 s
->indent_level
= indent
;
322 char *blobmsg_format_json_with_cb(struct blob_attr
*attr
, bool list
, blobmsg_json_format_t cb
, void *priv
, int indent
)
324 struct strbuf s
= {0};
328 setup_strbuf(&s
, attr
, cb
, priv
, indent
);
332 array
= blob_is_extended(attr
) &&
333 blobmsg_type(attr
) == BLOBMSG_TYPE_ARRAY
;
336 blobmsg_format_json_list(&s
, blobmsg_data(attr
), blobmsg_data_len(attr
), array
);
338 blobmsg_format_element(&s
, attr
, false, false);
345 ret
= realloc(s
.buf
, s
.pos
+ 1);
356 char *blobmsg_format_json_value_with_cb(struct blob_attr
*attr
, blobmsg_json_format_t cb
, void *priv
, int indent
)
358 struct strbuf s
= {0};
361 setup_strbuf(&s
, attr
, cb
, priv
, indent
);
365 blobmsg_format_element(&s
, attr
, true, false);
372 ret
= realloc(s
.buf
, s
.pos
+ 1);