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/* Copyright (c) 2009, 2011, 2013, 2015, 2016 Nicira, Inc.
*
* 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 "ovsdb-parser.h"
#include <ctype.h>
#include <stdarg.h>
#include "ovsdb-error.h"
void
ovsdb_parser_init(struct ovsdb_parser *parser, const struct json *json,
const char *name, ...)
{
va_list args;
va_start(args, name);
parser->name = xvasprintf(name, args);
va_end(args);
sset_init(&parser->used);
parser->error = NULL;
parser->json = (json && json->type == JSON_OBJECT ? json : NULL);
if (!parser->json) {
ovsdb_parser_raise_error(parser, "Object expected.");
}
}
bool
ovsdb_parser_is_id(const char *string)
{
unsigned char c;
c = *string;
if (!isalpha(c) && c != '_') {
return false;
}
for (;;) {
c = *++string;
if (c == '\0') {
return true;
} else if (!isalpha(c) && !isdigit(c) && c != '_') {
return false;
}
}
}
const struct json *
ovsdb_parser_member(struct ovsdb_parser *parser, const char *name,
enum ovsdb_parser_types types)
{
struct json *value;
if (!parser->json) {
return NULL;
}
value = shash_find_data(json_object(parser->json), name);
if (!value) {
if (!(types & OP_OPTIONAL)) {
ovsdb_parser_raise_error(parser,
"Required '%s' member is missing.", name);
}
return NULL;
}
if (((int) value->type >= 0 && value->type < JSON_N_TYPES
&& types & (1u << value->type))
|| (types & OP_ID && value->type == JSON_STRING
&& ovsdb_parser_is_id(value->string)))
{
sset_add(&parser->used, name);
return value;
} else {
ovsdb_parser_raise_error(parser, "Type mismatch for member '%s'.",
name);
return NULL;
}
}
void
ovsdb_parser_raise_error(struct ovsdb_parser *parser, const char *format, ...)
{
if (!parser->error) {
struct ovsdb_error *error;
va_list args;
char *message;
va_start(args, format);
message = xvasprintf(format, args);
va_end(args);
error = ovsdb_syntax_error(parser->json, NULL, "Parsing %s failed: %s",
parser->name, message);
free(message);
parser->error = error;
}
}
/* If 'parser' isn't already in an error state, sets its error to 'error'.
* Always takes ownership of 'error'. */
void
ovsdb_parser_put_error(struct ovsdb_parser *parser, struct ovsdb_error *error)
{
if (!parser->error) {
parser->error = error;
} else {
ovsdb_error_destroy(error);
}
}
struct ovsdb_error *
ovsdb_parser_get_error(const struct ovsdb_parser *parser)
{
return parser->error ? ovsdb_error_clone(parser->error) : NULL;
}
bool
ovsdb_parser_has_error(const struct ovsdb_parser *parser)
{
return parser->error != NULL;
}
struct ovsdb_error *
ovsdb_parser_destroy(struct ovsdb_parser *parser)
{
free(parser->name);
sset_destroy(&parser->used);
return parser->error;
}
struct ovsdb_error *
ovsdb_parser_finish(struct ovsdb_parser *parser)
{
if (!parser->error) {
const struct shash *object = json_object(parser->json);
size_t n_unused;
n_unused = shash_count(object) - sset_count(&parser->used);
if (n_unused) {
struct shash_node *node;
SHASH_FOR_EACH (node, object) {
if (!sset_contains(&parser->used, node->name)) {
if (n_unused > 1) {
ovsdb_parser_raise_error(
parser,
"Member '%s' and %"PRIuSIZE" other member%s "
"are present but not allowed here.",
node->name, n_unused - 1, n_unused > 2 ? "s" : "");
} else {
ovsdb_parser_raise_error(
parser,
"Member '%s' is present but not allowed here.",
node->name);
}
break;
}
}
}
}
return ovsdb_parser_destroy(parser);
}
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