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/*
* 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 <string.h>
#include <stdio.h>
#include <unistd.h>
#include <json-c/json.h>
#include "json2c.h"
/**
* process a file and prints its expansion on stdout
*/
void process(char *filename)
{
char *desc;
struct json_object *root;
/* translate - */
if (!strcmp(filename, "-"))
filename = "/dev/stdin";
/* check access */
if (access(filename, R_OK)) {
fprintf(stderr, "can't access file %s\n", filename);
exit(1);
}
/* read the file */
root = json_object_from_file(filename);
if (!root) {
fprintf(stderr, "reading file %s produced null\n", filename);
exit(1);
}
/* create the description */
desc = json2c_std(root);
if (!desc) {
fprintf(stderr, "out of memory\n");
exit(1);
}
/* print the description */
printf("%s", desc);
/* clean up */
json_object_put(root);
free(desc);
}
/** process the list of files or stdin if none */
int main(int ac, char **av)
{
if (!*++av)
process("-");
else {
do { process(*av); } while(*++av);
}
return 0;
}
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