/src/logging-log4cxx/src/main/cpp/timezone.cpp

Source
/*
 * 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.
 */

#define __STDC_CONSTANT_MACROS
#include <log4cxx/logstring.h>
#include <log4cxx/helpers/timezone.h>
#include <stdlib.h>

#include <apr_time.h>
#include <apr_pools.h>
#include <apr_strings.h>
#include <log4cxx/helpers/exception.h>
#include <log4cxx/helpers/transcoder.h>
#include <log4cxx/helpers/stringhelper.h>
#include <log4cxx/helpers/pool.h>
#include <log4cxx/logger.h>

using namespace LOG4CXX_NS;
using namespace LOG4CXX_NS::helpers;

IMPLEMENT_LOG4CXX_OBJECT( TimeZone )

namespace LOG4CXX_NS
{
namespace helpers
{
namespace TimeZoneImpl
{
/** Time zone object that represents GMT. */
class GMTTimeZone : public TimeZone
{
  public:
    /** Class factory. */
    static const TimeZonePtr& getInstance()
    {
      static WideLife<TimeZonePtr> tz = std::make_shared<GMTTimeZone>();
      return tz;
    }

    /** Explode time to human readable form. */
    log4cxx_status_t explode( apr_time_exp_t* result, log4cxx_time_t input ) const
    {
      apr_status_t stat;

      //  APR 1.1 and early mishandles microseconds on dates
      //   before 1970, APR bug 32520
      if (LOG4CXX_UNLIKELY(input < 0 && apr_time_usec(input) < 0))
      {
        apr_time_t floorTime = (apr_time_sec(input) - 1) * APR_USEC_PER_SEC;
        stat = apr_time_exp_gmt(result, floorTime);
        result->tm_usec = (int) (input - floorTime);
      }
      else
      {
        stat = apr_time_exp_gmt( result, input );
      }

      return stat;
    }

    GMTTimeZone() : TimeZone( LOG4CXX_STR("GMT") )
    {
    }
};



/** Time zone object that represents GMT. */
class LocalTimeZone : public TimeZone
{
  public:
    /** Class factory. */
    static const TimeZonePtr& getInstance()
    {
      static WideLife<TimeZonePtr> tz = std::make_shared<LocalTimeZone>();
      return tz;
    }

    /** Explode time to human readable form. */
    log4cxx_status_t explode( apr_time_exp_t* result, log4cxx_time_t input ) const
    {
      apr_status_t stat;

      //  APR 1.1 and early mishandles microseconds on dates
      //   before 1970, APR bug 32520
      if (LOG4CXX_UNLIKELY(input < 0 && apr_time_usec(input) < 0))
      {
        apr_time_t floorTime = (apr_time_sec(input) - 1) * APR_USEC_PER_SEC;
        stat = apr_time_exp_lt(result, floorTime);
        result->tm_usec = (int) (input - floorTime);
      }
      else
      {
        stat = apr_time_exp_lt( result, input );
      }

      return stat;
    }


    LocalTimeZone() : TimeZone( getTimeZoneName() )
    {
    }

  private:
    static const LogString getTimeZoneName()
    {
      const int MAX_TZ_LENGTH = 255;
      char tzName[MAX_TZ_LENGTH];
      apr_size_t tzLength;
      apr_time_exp_t tm;
      apr_time_exp_lt(&tm, 0);
      apr_strftime(tzName, &tzLength, MAX_TZ_LENGTH, "%Z", &tm);

      if (tzLength == 0)
      {
        apr_strftime(tzName, &tzLength, MAX_TZ_LENGTH, "%z", &tm);
      }

      tzName[tzLength] = 0;
      LogString retval;
      LOG4CXX_NS::helpers::Transcoder::decode(tzName, retval);
      return retval;
    }

};



/** Time zone object that represents a fixed offset from GMT. */
class FixedTimeZone : public TimeZone
{
  public:
    FixedTimeZone( const LogString& name, apr_int32_t offset1 ) : TimeZone( name ), offset( offset1 )
    {
    }

    /** Explode time to human readable form. */
    log4cxx_status_t explode( apr_time_exp_t* result, log4cxx_time_t input ) const
    {
      apr_status_t stat;

      //  APR 1.1 and early mishandles microseconds on dates
      //   before 1970, APR bug 32520
      if (LOG4CXX_UNLIKELY(input < 0 && apr_time_usec(input) < 0))
      {
        apr_time_t floorTime = (apr_time_sec(input) - 1) * APR_USEC_PER_SEC;
        stat = apr_time_exp_tz(result, floorTime, offset);
        result->tm_usec = (int) (input - floorTime);
      }
      else
      {
        stat = apr_time_exp_tz( result, input, offset );
      }

      return stat;
    }


  private:
    const apr_int32_t offset;
};

}
}
}



TimeZone::TimeZone( const LogString& id1 ) : id( id1 )
{
}

TimeZone::~TimeZone()
{
}

const TimeZonePtr& TimeZone::getDefault()
{
  return LOG4CXX_NS::helpers::TimeZoneImpl::LocalTimeZone::getInstance();
}

const TimeZonePtr& TimeZone::getGMT()
{
  return LOG4CXX_NS::helpers::TimeZoneImpl::GMTTimeZone::getInstance();
}

const TimeZonePtr TimeZone::getTimeZone( const LogString& id )
{
  const logchar gmt[] = { 0x47, 0x4D, 0x54, 0 };

  if ( id == gmt )
  {
    return LOG4CXX_NS::helpers::TimeZoneImpl::GMTTimeZone::getInstance();
  }

  if ( id.length() >= 5 && id.substr( 0, 3 ) == gmt )
  {
    int hours = 0;
    int minutes = 0;
    int sign = 1;

    if (id[3] == 0x2D /* '-' */)
    {
      sign = -1;
    }

    LogString off( id.substr( 4 ) );

    if ( id.length() >= 7 )
    {
      size_t colonPos = off.find( 0x3A /* ':' */);

      if ( colonPos == LogString::npos )
      {
        minutes = StringHelper::toInt(off.substr(off.length() - 2));
        hours = StringHelper::toInt(off.substr(0, off.length() - 2));
      }
      else
      {
        minutes = StringHelper::toInt(off.substr(colonPos + 1));
        hours = StringHelper::toInt(off.substr(0, colonPos));
      }
    }
    else
    {
      hours = StringHelper::toInt(off);
    }

    // Make sure that our offset can't be crazy
    if( hours < -12 || 14 < hours)
    {
      throw RuntimeException(LOG4CXX_STR("Hour offset must be in (-12..14)"));
    }
    if (minutes < 0 || 60 < minutes)
    {
      throw RuntimeException(LOG4CXX_STR("Minute offset must be in (0..60)"));
    }

    LogString s(gmt);
    Pool p;
    LogString hh;
    StringHelper::toString(hours, p, hh);

    if (sign > 0)
    {
      s.append(1, (logchar) 0x2B /* '+' */);
    }
    else
    {
      s.append(1, (logchar) 0x2D /* '-' */);
    }

    if (hh.length() == 1)
    {
      s.append(1, (logchar) 0x30 /* '0' */);
    }

    s.append(hh);
    s.append(1, (logchar) 0x3A /*' :' */);
    LogString mm;
    StringHelper::toString(minutes, p, mm);

    if (mm.length() == 1)
    {
      s.append(1, (logchar) 0x30 /* '0' */);
    }

    s.append(mm);
    apr_int32_t offset = sign * (hours * 3600 + minutes * 60);
    return std::make_shared<helpers::TimeZoneImpl::FixedTimeZone>( s, offset );
  }

  const TimeZonePtr& ltz = getDefault();

  if ( ltz->getID() == id )
  {
    return ltz;
  }

  return getGMT();
}


Coverage Report

Created: 2025-12-14 06:19