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/**
* Copyright (C) 2019-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/util/pcre_util.h"
#include <fmt/format.h>
#include "mongo/base/error_codes.h"
#include "mongo/util/assert_util.h"
#include "mongo/util/pcre.h"
namespace mongo::pcre_util {
using namespace fmt::literals;
pcre::CompileOptions flagsToOptions(StringData optionFlags, StringData opName) {
pcre::CompileOptions opt = pcre::UTF;
for (char flag : optionFlags) {
switch (flag) {
case 'i': // case insensitive
opt |= pcre::CASELESS;
continue;
case 'm': // newlines match ^ and $
opt |= pcre::MULTILINE;
continue;
case 's': // allows dot to include newline chars
opt |= pcre::DOTALL;
continue;
case 'u':
continue;
case 'x': // extended mode
opt |= pcre::EXTENDED;
continue;
default:
uasserted(51108, "{} invalid flag in regex options: {}"_format(opName, flag));
}
}
return opt;
}
std::string optionsToFlags(pcre::CompileOptions opt) {
std::string optionFlags = "";
if (opt & pcre::CASELESS)
optionFlags += 'i';
if (opt & pcre::MULTILINE)
optionFlags += 'm';
if (opt & pcre::DOTALL)
optionFlags += 's';
if (opt & pcre::EXTENDED)
optionFlags += 'x';
return optionFlags;
}
std::string quoteMeta(StringData str) {
std::string result;
for (char c : str) {
if (c == '\0') {
result += "\\0";
continue;
}
if (!ctype::isAlnum(c) && c != '_' && !(c & 0x80))
result += '\\';
result += c;
}
return result;
}
} // namespace mongo::pcre_util
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