added: a new directory "etc"

there'll be some generic config files for winix
added: a new file in etc directory: time_zones_file
       list of time zones (not finished yet -- daylight saving time is needed)
added: option to config: etc_dir
       a directory in which there are some config files
       used mainly when winix starts
       default: empty (means not for using)
added: option to config: time_zones_file
       a file in etc_dir with time zones info
       default: time_zones.conf
       this is a Space structure with all time zones
added: to system: TimeZones struct
       list of time zones read from etc/time_zones.conf



git-svn-id: svn://ttmath.org/publicrep/winix/trunk@849 e52654a7-88a9-db11-a3e9-0013d4bc506e

core/timezones.cpp

@@ -0,0 +1,163 @@
+/*
+ * This file is a part of Winix
+ * and is not publicly distributed
+ *
+ * Copyright (c) 2012, Tomasz Sowa
+ * All rights reserved.
+ *
+ */
+
+#include "timezones.h"
+#include "misc.h"
+#include "log.h"
+
+
+
+TimeZones::TimeZones()
+{
+	Clear();
+}
+
+
+time_t TimeZones::ParseOffset(const wchar_t * str)
+{
+PT::Date date;
+bool is_sign = false;
+time_t offset = 0;
+
+	str = SkipWhite(str);
+
+	if( *str == '-' )
+	{
+		is_sign = true;
+		str += 1;
+	}
+	else
+	if( *str == '+' )
+	{
+		str += 1;
+	}
+
+	if( date.ParseTime(str) )
+	{
+		offset = date.hour * 60 * 60 + date.min * 60;
+
+		if( is_sign )
+			offset = -offset;
+	}
+
+return offset;
+}
+
+
+void TimeZones::ParseZones()
+{
+	for(size_t i=0 ; i<temp_space.spaces.size() ; ++i)
+	{
+		PT::Space & zone = *temp_space.spaces[i];
+		zone.Add(L"tz_offset", 		ParseOffset(zone.Text(L"tz_offset_str").c_str()));
+		zone.Add(L"tz_dst_offset", 	ParseOffset(zone.Text(L"tz_dst_offset_str").c_str()));
+
+		temp_zone.Clear();
+
+		if( temp_zone.time_zone.SetTz(zone) )
+		{
+			temp_zone.name_key = zone.name;
+
+			if( !FindZone(temp_zone.time_zone.tz_id) )
+			{
+				tab.push_back(temp_zone);
+			}
+			else
+			{
+				log << log1 << "Tz: zone with id: " << temp_zone.time_zone.tz_id
+					<< " already exists (skipping)" << logend;
+			}
+		}
+		else
+		{
+			log << log1 << "System: problem with reading info from time zone: "
+				<< zone.name << " (skipping) " << logend;
+		}
+	}
+}
+
+
+
+// !! IMPROVE ME
+// in the future we do not have to read the whole file
+// just space by space (not implemented in Space at the moment)
+bool TimeZones::ReadTimeZones(const wchar_t * path)
+{
+	parser.UTF8(true);
+	parser.SetSpace(temp_space);
+	tab.clear();
+
+	PT::SpaceParser::Status status = parser.Parse(path);
+
+	if( status == PT::SpaceParser::ok )
+	{
+		ParseZones();
+		log << log2 << "Tz: time zones loaded, there are " << tab.size() << " zones" << logend;
+	}
+	else
+	if( status == PT::SpaceParser::syntax_error )
+	{
+		log << log1 << "TZ: error in time zone file, line: " << parser.line << logend;
+	}
+	else
+	if( status == PT::SpaceParser::cant_open_file )
+	{
+		log << log1 << "TZ: I cannot open the time zone file: " << path << logend;
+	}
+
+	temp_space.Clear();
+
+return status == PT::SpaceParser::ok;
+}
+
+
+
+bool TimeZones::ReadTimeZones(const std::wstring & path)
+{
+	return ReadTimeZones(path.c_str());
+}
+
+
+
+
+TimeZones::Zone * TimeZones::FindZone(int tz_id)
+{
+	for(size_t i=0 ; i<tab.size() ; ++i)
+	{
+		if( tab[i].time_zone.tz_id == tz_id )
+			return &tab[i];
+	}
+
+return 0;
+}
+
+
+TimeZones::Zone & TimeZones::operator[](size_t index)
+{
+	return tab[index];
+}
+
+
+size_t TimeZones::Size() const
+{
+	return tab.size();
+}
+
+
+bool TimeZones::Empty() const
+{
+	return tab.empty();
+}
+
+
+void TimeZones::Clear()
+{
+	tab.clear();
+}
+