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/*
* Copyright (c) 2011 Samsung Electronics Co., Ltd All Rights Reserved
*
* 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 "RegexUtils.h"
#include <pcrecpp.h>
#include "StringUtils.h"
namespace WrtDeviceApis {
namespace Commons {
std::string addStartPositionMark(const std::string &value)
{
if (!String::startsWith(value, "^") && !String::startsWith(value, ".*")) {
return "^" + value;
}
return value;
}
std::string addEndPositionMark(const std::string &value)
{
if ((!String::endsWith(value, "$") || String::endsWith(value, "\\$")) &&
!String::endsWith(value, ".*"))
{
return value + "$";
}
return value;
}
std::string addStartAndEndPositionMark(const std::string &value)
{
return addEndPositionMark(addStartPositionMark(value));
}
std::string preparePercent(const std::string& str)
{
std::string result = escape(str);
pcrecpp::RE("(([^\\\\])\\*|^()\\*)").GlobalReplace("\\2\\\\*", &result);
pcrecpp::RE("(([^\\\\])%|^()%)").GlobalReplace("\\2.*", &result);
return result;
}
std::string prepareAsterisk(const std::string& str)
{
std::string result = escape(str);
// Replaces single wildcard "*" with version more compliant with Perl
// regular exrepssions, i.e. ".*".
pcrecpp::RE("(([^\\\\])\\*|^()\\*)").GlobalReplace("\\2.*", &result);
return result;
}
std::string escape(const std::string& str)
{
std::string result = str;
// Escape standard regular expressions' metacharacters,
// i.e.: \, ., -, +, ?, (, ), [, ], ^, $, |
const char* metas = "(\\.|\\-|\\+|\\?|\\(|\\)|\\[|\\]|\\^|\\$|\\|"
"|(\\\\[^\\*\\%]|\\\\$))"; // \*, \% won't get
// additional '\'
pcrecpp::RE(metas).GlobalReplace("\\\\\\1", &result);
return result;
}
}
} // WrtDeviceApisCommon
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