1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
/*
* Copyright (C) 2016, 2017, 2018 "IoT.bzh"
* Author José Bollo <jose.bollo@iot.bzh>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* This simple program expands the object { "$ref": "#/path/to/a/target" }
*
* For example:
*
* {
* "type":{
* "a": "int",
* "b": { "$ref": "#/type/a" }
* }
* }
*
* will be exapanded to
*
* {
* "type":{
* "a": "int",
* "b": "int"
* }
* }
*
* Invocation: program [file|-]...
*
* without arguments, it reads the input.
*/
#define _GNU_SOURCE
#include <stdio.h>
#include <string.h>
#include <json-c/json.h>
#include "getref.h"
/**
* Search for a reference of type "#/a/b/c" int the
* parsed JSON root object
*/
int search$ref(struct json_object *root, const char *ref, struct json_object **result)
{
char *d;
struct json_object *i;
/* does it match #/ at the beginning? */
if (ref[0] != '#' || (ref[0] && ref[1] != '/')) {
fprintf(stderr, "$ref invalid. Was: %s", ref);
return 0;
}
/* search from root to target */
i = root;
d = strdupa(ref+2);
d = strtok(d, "/");
while(i && d) {
if (!json_object_object_get_ex(i, d, &i))
return 0;
d = strtok(NULL, "/");
}
if (result)
*result = i;
return 1;
}
struct json_object *get$ref(struct json_object *root, const char *ref)
{
struct json_object *result;
return search$ref(root, ref, &result) ? result : NULL;
}
|
