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/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2021 Sadie Powell <sadie@witchery.services>
*
* This file is part of InspIRCd. InspIRCd is free software: you can
* redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, version 2.
*
* 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 GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/// $CompilerFlags: find_compiler_flags("libpcre2-8")
/// $LinkerFlags: find_linker_flags("libpcre2-8")
/// $PackageInfo: require_system("arch") pcre2
/// $PackageInfo: require_system("centos") pcre2-devel
/// $PackageInfo: require_system("darwin") pcre2
/// $PackageInfo: require_system("debian") libpcre2-dev
/// $PackageInfo: require_system("ubuntu") libpcre2-dev
#include "inspircd.h"
#include "modules/regex.h"
#define PCRE2_CODE_UNIT_WIDTH 8
#include <pcre2.h>
#ifdef _WIN32
# pragma comment(lib, "pcre2-8.lib")
#endif
class PCREPattern final
: public Regex::Pattern
{
private:
pcre2_code* regex;
public:
PCREPattern(const Module* mod, const std::string& pattern, uint8_t options)
: Regex::Pattern(pattern, options)
{
int flags = 0;
if (options & Regex::OPT_CASE_INSENSITIVE)
flags &= PCRE2_CASELESS;
int errorcode;
PCRE2_SIZE erroroffset;
regex = pcre2_compile(reinterpret_cast<PCRE2_SPTR8>(pattern.c_str()), pattern.length(), flags, &errorcode, &erroroffset, nullptr);
if (!regex)
{
PCRE2_UCHAR errorstr[128];
pcre2_get_error_message(errorcode, errorstr, sizeof errorstr);
throw Regex::Exception(mod, pattern, reinterpret_cast<const char*>(errorstr), erroroffset);
}
}
~PCREPattern() override
{
pcre2_code_free(regex);
}
bool IsMatch(const std::string& text) override
{
pcre2_match_data* unused = pcre2_match_data_create(1, nullptr);
int result = pcre2_match(regex, reinterpret_cast<PCRE2_SPTR8>(text.c_str()), text.length(), 0, 0, unused, nullptr);
pcre2_match_data_free(unused);
return result >= 0;
}
};
class ModuleRegexPCRE final
: public Module
{
private:
Regex::SimpleEngine<PCREPattern> regex;
public:
ModuleRegexPCRE()
: Module(VF_VENDOR, "Provides the pcre regular expression engine which uses the PCRE library.")
, regex(this, "pcre")
{
}
};
MODULE_INIT(ModuleRegexPCRE)
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