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/*
* Copyright (c) 2009, 2010 Nicira Networks.
*
* 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.
*/
#include <config.h>
#include "json.h"
#include <ctype.h>
#include <errno.h>
#include <getopt.h>
#include <stdio.h>
#include "util.h"
/* --pretty: If set, the JSON output is pretty-printed, instead of printed as
* compactly as possible. */
static int pretty = 0;
/* --multiple: If set, the input is a sequence of JSON objects or arrays,
* instead of exactly one object or array. */
static int multiple = 0;
static bool
print_and_free_json(struct json *json)
{
bool ok;
if (json->type == JSON_STRING) {
printf("error: %s\n", json->u.string);
ok = false;
} else {
char *s = json_to_string(json, JSSF_SORT | (pretty ? JSSF_PRETTY : 0));
puts(s);
free(s);
ok = true;
}
json_destroy(json);
return ok;
}
static bool
refill(FILE *file, void *buffer, size_t buffer_size, size_t *n, size_t *used)
{
*used = 0;
if (feof(file)) {
*n = 0;
return false;
} else {
*n = fread(buffer, 1, buffer_size, file);
if (ferror(file)) {
ovs_fatal(errno, "Error reading input file");
}
return *n > 0;
}
}
static bool
parse_multiple(FILE *stream)
{
struct json_parser *parser;
char buffer[BUFSIZ];
size_t n, used;
bool ok;
parser = NULL;
n = used = 0;
ok = true;
while (used < n || refill(stream, buffer, sizeof buffer, &n, &used)) {
if (!parser && isspace((unsigned char) buffer[used])) {
/* Skip white space. */
used++;
} else {
if (!parser) {
parser = json_parser_create(0);
}
used += json_parser_feed(parser, &buffer[used], n - used);
if (used < n) {
if (!print_and_free_json(json_parser_finish(parser))) {
ok = false;
}
parser = NULL;
}
}
}
if (parser) {
if (!print_and_free_json(json_parser_finish(parser))) {
ok = false;
}
}
return ok;
}
int
main(int argc, char *argv[])
{
const char *input_file;
FILE *stream;
bool ok;
set_program_name(argv[0]);
for (;;) {
static const struct option options[] = {
{"pretty", no_argument, &pretty, 1},
{"multiple", no_argument, &multiple, 1},
};
int option_index = 0;
int c = getopt_long (argc, argv, "", options, &option_index);
if (c == -1) {
break;
}
switch (c) {
case 0:
break;
case '?':
exit(1);
default:
abort();
}
}
if (argc - optind != 1) {
ovs_fatal(0, "usage: %s [--pretty] [--multiple] INPUT.json",
program_name);
}
input_file = argv[optind];
stream = !strcmp(input_file, "-") ? stdin : fopen(input_file, "r");
if (!stream) {
ovs_fatal(errno, "Cannot open \"%s\"", input_file);
}
if (multiple) {
ok = parse_multiple(stream);
} else {
ok = print_and_free_json(json_from_stream(stream));
}
fclose(stream);
return !ok;
}
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