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REGEX.cpp
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REGEX.cpp
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/*
* Copyright (C) 2016,2017 by Jonathan Naylor G4KLX
*
* Contributed by Simon G7RZU
*
* This program 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "REGEX.h"
#include "Log.h"
#include <cstdio>
#include <cstring>
CREGEX::CREGEX(const std::string& regexFile) :
m_regexFile(regexFile),
m_regex()
{
}
bool CREGEX::load()
/* Older versions of GCC appear to support REGEX but silently fail to match. Even
* though the headers exist and the code compiles and runs cleanly. The below #if block
* stops the REGEXs being loaded in these cases, effectively disabling REGEX functionality.
* The loading code is replaced with a log entry to show the user this has happened.
*/
{
#if defined(__GNUC__) && (__GNUC__ <= 4) || (__GNUC__ == 4 && __GNUC_MINOR__ <= 9)
LogError("REGEX is not properly supported in GCC versions below 4.9. Not loading REGEX");
return false;
}
#else
FILE* fp = ::fopen(m_regexFile.c_str(), "rt");
if (fp != NULL) {
char buffer[100U];
std::regex regex;
while (::fgets(buffer, 100U, fp) != NULL) {
if (buffer[0U] == '#')
continue;
const char* regexStr = ::strtok(buffer, "\r\n");
if (regexStr != NULL) {
try {
regex = std::regex(regexStr);
}
catch(const std::regex_error& e) {
LogDebug("error in regex %s (%s), skipping",regexStr,e.what());
continue;
}
m_regex.push_back(regex);
}
}
::fclose(fp);
}
size_t size = m_regex.size();
LogInfo("Loaded %u REGEX from file %s", size, m_regexFile.c_str());
size = m_regex.size();
if (size == 0U)
return false;
return true;
}
#endif
std::vector<std::regex> CREGEX::get()
{
return(m_regex);
}