2 * Copyright (C) 2016, 2017, 2018 "IoT.bzh"
3 * Author José Bollo <jose.bollo@iot.bzh>
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
18 * This simple program expands the object { "$ref": "#/path/to/a/target" }
25 * "b": { "$ref": "#/type/a" }
29 * will be exapanded to
38 * Invocation: program [file|-]...
40 * without arguments, it reads the input.
48 #include <json-c/json.h>
53 * process a file and prints its expansion on stdout
55 void process(char *filename)
57 struct json_object *root;
60 if (!strcmp(filename, "-"))
61 filename = "/dev/stdin";
64 if (access(filename, R_OK)) {
65 fprintf(stderr, "can't access file %s\n", filename);
70 root = json_object_from_file(filename);
72 fprintf(stderr, "reading file %s produced null\n", filename);
77 root = exp$refs(root);
80 if (!exp$refs_is_tree(root)) {
81 fprintf(stderr, "expansion of %s doesn't produce a tree\n", filename);
85 /* print the result */
86 json_object_to_file_ext ("/dev/stdout", root, JSON_C_TO_STRING_PRETTY);
89 json_object_put(root);
92 /** process the list of files or stdin if none */
93 int main(int ac, char **av)
98 do { process(*av); } while(*++av);