/*
|
* Licensed to the Apache Software Foundation (ASF) under one
|
* or more contributor license agreements. See the NOTICE file
|
* distributed with this work for additional information
|
* regarding copyright ownership. The ASF licenses this file
|
* to you 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 "postgres.h"
|
|
#include "catalog/pg_collation_d.h"
|
#include "utils/builtins.h"
|
|
#include "utils/name_validation.h"
|
|
static int regex_match(const char *string, const char *pattern);
|
|
/*
|
* Returns whether the graph name is valid.
|
*
|
* @param graph_name name of the graph
|
* @return int
|
*/
|
int is_valid_graph_name(const char *graph_name)
|
{
|
int len = strlen(graph_name);
|
|
if (len < MIN_GRAPH_NAME_LEN || len > MAX_GRAPH_NAME_LEN)
|
{
|
return 0;
|
}
|
|
return regex_match(graph_name, REGEX_GRAPH_NAME);
|
}
|
|
/*
|
* Returns whether the label name is valid.
|
*
|
* Note: label_type parameter is not used in this implementation.
|
* It should be used if validation algorithm for edge and vertex
|
* differs in future.
|
*
|
* @param label_name name of the label
|
* @param label_type label type defined in label_commands.h
|
* @return int
|
*/
|
int is_valid_label(char *label_name, char label_type)
|
{
|
int len = strlen(label_name);
|
|
if (len < MIN_LABEL_NAME_LEN || len > MAX_LABEL_NAME_LEN)
|
{
|
return 0;
|
}
|
|
return regex_match(label_name, REGEX_LABEL_NAME);
|
}
|
|
/*
|
* Returns whether there is a regex match.
|
*
|
* @param string source string
|
* @param pattern regex pattern
|
* @return int match returns non-zero
|
*/
|
static int regex_match(const char *string, const char *pattern)
|
{
|
text *t_string = NULL;
|
text *t_pattern = NULL;
|
Datum result;
|
|
t_string = cstring_to_text_with_len(string, strlen(string));
|
t_pattern = cstring_to_text_with_len(pattern, strlen(pattern));
|
|
result = (DirectFunctionCall2Coll(textregexeq, C_COLLATION_OID,
|
PointerGetDatum(t_string),
|
PointerGetDatum(t_pattern)));
|
|
return DatumGetBool(result);
|
}
|