// CoreUtil
// 
// Copyright (C) 2012-2014 Daiyuu Nobori. All Rights Reserved.
// Copyright (C) 2012-2014 SoftEther VPN Project at University of Tsukuba. All Rights Reserved.
// 
// License: The Apache License, Version 2.0
// https://www.apache.org/licenses/LICENSE-2.0
// 
// DISCLAIMER
// ==========
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
// 
// THIS SOFTWARE IS DEVELOPED IN JAPAN, AND DISTRIBUTED FROM JAPAN, UNDER
// JAPANESE LAWS. YOU MUST AGREE IN ADVANCE TO USE, COPY, MODIFY, MERGE, PUBLISH,
// DISTRIBUTE, SUBLICENSE, AND/OR SELL COPIES OF THIS SOFTWARE, THAT ANY
// JURIDICAL DISPUTES WHICH ARE CONCERNED TO THIS SOFTWARE OR ITS CONTENTS,
// AGAINST US (SOFTETHER PROJECT, SOFTETHER CORPORATION, DAIYUU NOBORI OR OTHER
// SUPPLIERS), OR ANY JURIDICAL DISPUTES AGAINST US WHICH ARE CAUSED BY ANY KIND
// OF USING, COPYING, MODIFYING, MERGING, PUBLISHING, DISTRIBUTING, SUBLICENSING,
// AND/OR SELLING COPIES OF THIS SOFTWARE SHALL BE REGARDED AS BE CONSTRUED AND
// CONTROLLED BY JAPANESE LAWS, AND YOU MUST FURTHER CONSENT TO EXCLUSIVE
// JURISDICTION AND VENUE IN THE COURTS SITTING IN TOKYO, JAPAN. YOU MUST WAIVE
// ALL DEFENSES OF LACK OF PERSONAL JURISDICTION AND FORUM NON CONVENIENS.
// PROCESS MAY BE SERVED ON EITHER PARTY IN THE MANNER AUTHORIZED BY APPLICABLE
// LAW OR COURT RULE.
// 
// USE ONLY IN JAPAN. DO NOT USE THIS SOFTWARE IN ANOTHER COUNTRY UNLESS YOU HAVE
// A CONFIRMATION THAT THIS SOFTWARE DOES NOT VIOLATE ANY CRIMINAL LAWS OR CIVIL
// RIGHTS IN THAT PARTICULAR COUNTRY. USING THIS SOFTWARE IN OTHER COUNTRIES IS
// COMPLETELY AT YOUR OWN RISK. THE SOFTETHER VPN PROJECT HAS DEVELOPED AND
// DISTRIBUTED THIS SOFTWARE TO COMPLY ONLY WITH THE JAPANESE LAWS AND EXISTING
// CIVIL RIGHTS INCLUDING PATENTS WHICH ARE SUBJECTS APPLY IN JAPAN. OTHER
// COUNTRIES' LAWS OR CIVIL RIGHTS ARE NONE OF OUR CONCERNS NOR RESPONSIBILITIES.
// WE HAVE NEVER INVESTIGATED ANY CRIMINAL REGULATIONS, CIVIL LAWS OR
// INTELLECTUAL PROPERTY RIGHTS INCLUDING PATENTS IN ANY OF OTHER 200+ COUNTRIES
// AND TERRITORIES. BY NATURE, THERE ARE 200+ REGIONS IN THE WORLD, WITH
// DIFFERENT LAWS. IT IS IMPOSSIBLE TO VERIFY EVERY COUNTRIES' LAWS, REGULATIONS
// AND CIVIL RIGHTS TO MAKE THE SOFTWARE COMPLY WITH ALL COUNTRIES' LAWS BY THE
// PROJECT. EVEN IF YOU WILL BE SUED BY A PRIVATE ENTITY OR BE DAMAGED BY A
// PUBLIC SERVANT IN YOUR COUNTRY, THE DEVELOPERS OF THIS SOFTWARE WILL NEVER BE
// LIABLE TO RECOVER OR COMPENSATE SUCH DAMAGES, CRIMINAL OR CIVIL
// RESPONSIBILITIES. NOTE THAT THIS LINE IS NOT LICENSE RESTRICTION BUT JUST A
// STATEMENT FOR WARNING AND DISCLAIMER.
// 
// READ AND UNDERSTAND THE 'WARNING.TXT' FILE BEFORE USING THIS SOFTWARE.
// SOME SOFTWARE PROGRAMS FROM THIRD PARTIES ARE INCLUDED ON THIS SOFTWARE WITH
// LICENSE CONDITIONS WHICH ARE DESCRIBED ON THE 'THIRD_PARTY.TXT' FILE.
// 
// 
// SOURCE CODE CONTRIBUTION
// ------------------------
// 
// Your contribution to SoftEther VPN Project is much appreciated.
// Please send patches to us through GitHub.
// Read the SoftEther VPN Patch Acceptance Policy in advance:
// http://www.softether.org/5-download/src/9.patch
// 
// 
// DEAR SECURITY EXPERTS
// ---------------------
// 
// If you find a bug or a security vulnerability please kindly inform us
// about the problem immediately so that we can fix the security problem
// to protect a lot of users around the world as soon as possible.
// 
// Our e-mail address for security reports is:
// softether-vpn-security [at] softether.org
// 
// Please note that the above e-mail address is not a technical support
// inquiry address. If you need technical assistance, please visit
// http://www.softether.org/ and ask your question on the users forum.
// 
// Thank you for your cooperation.
// 
// 
// NO MEMORY OR RESOURCE LEAKS
// ---------------------------
// 
// The memory-leaks and resource-leaks verification under the stress
// test has been passed before release this source code.


using System;
using System.Threading;
using System.Data;
using System.Data.Sql;
using System.Data.SqlClient;
using System.Data.SqlTypes;
using System.Text;
using System.Configuration;
using System.Collections;
using System.Collections.Generic;
using System.Security.Cryptography;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.IO;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Drawing2D;
using System.Diagnostics;
using System.Web.Mail;
using System.Net;
using System.Net.Sockets;
using System.Net.NetworkInformation;
using System.Net.Mail;
using System.Net.Mime;
using System.Reflection;
using CoreUtil;

namespace CoreUtil
{
	public class Stb
	{
		Dictionary<string, StbEntry> entryList;

		public string this[string name]
		{
			get
			{
				if (entryList.ContainsKey(name.ToUpper()))
				{
					return entryList[name.ToUpper()].String;
				}
				else
				{
					return "";
				}
			}
		}

		public Stb(string filename)
		{
			init(IO.ReadFile(filename));
		}

		public Stb(byte[] data)
		{
			init(data);
		}

		void init(byte[] data)
		{
			entryList = new Dictionary<string, StbEntry>();
			MemoryStream ms = new MemoryStream(data);
			StreamReader sr = new StreamReader(ms);
			string prefix = "";

			while (true)
			{
				string tmp = sr.ReadLine();
				if (tmp == null)
				{
					break;
				}

				StbEntry t = StbEntry.ParseTableLine(tmp, ref prefix);
				if (t != null)
				{
					if (entryList.ContainsKey(t.Name.ToUpper()) == false)
					{
						entryList.Add(t.Name.ToUpper(), t);
					}
				}
			}
		}

		const string standardStbFileName = "|strtable.stb";
		static string defaultStbFileName = standardStbFileName;
		static object lockObj = new object();
		static Stb defaultStb = null;
		public static string DefaultStbFileName
		{
			set
			{
				defaultStbFileName = value;
			}

			get
			{
				return defaultStbFileName;
			}
		}
		public static Stb DefaultStb
		{
			get
			{
				lock (lockObj)
				{
					if (defaultStb == null)
					{
						defaultStb = new Stb(Stb.DefaultStbFileName);
					}

					return defaultStb;
				}
			}
		}
		public static string SS(string name)
		{
			return DefaultStb[name];
		}
		public static uint II(string name)
		{
			return Str.StrToUInt(SS(name));
		}
	}

	public class StbEntry
	{
		string name;
		public string Name
		{
			get { return name; }
		}

		string str;
		public string String
		{
			get { return str; }
		}

		public StbEntry(string name, string str)
		{
			this.name = name;
			this.str = str;
		}
		public static StbEntry ParseTableLine(string line, ref string prefix)
		{
			int i, len;
			int string_start;
			int len_name;
			string name, name2;

			line = line.TrimStart(' ', '\t');
			len = line.Length;
			if (len == 0)
			{
				return null;
			}

			if (line[0] == '#' || (line[0] == '/' && line[1] == '/'))
			{
				return null;
			}

			bool b = false;
			len_name = 0;
			for (i = 0; i < line.Length; i++)
			{
				if (line[i] == ' ' || line[i] == '\t')
				{
					b = true;
					break;
				}
				len_name++;
			}

			if (b == false)
			{
				return null;
			}

			name = line.Substring(0, len_name);

			string_start = len_name;
			for (i = len_name; i < len; i++)
			{
				if (line[i] != ' ' && line[i] != '\t')
				{
					break;
				}
				string_start++;
			}
			if (i == len)
			{
				return null;
			}

			string str = line.Substring(string_start);

			str = UnescapeStr(str);

			if (Str.StrCmpi(name, "PREFIX"))
			{
				prefix = str;
				prefix = prefix.TrimStart();

				if (Str.StrCmpi(prefix, "$") || Str.StrCmpi(prefix, "NULL"))
				{
					prefix = "";
				}

				return null;
			}

			name2 = "";

			if (prefix != "")
			{
				name2 += prefix + "@";
			}

			name2 += name;

			return new StbEntry(name2, str);
		}

		public static string UnescapeStr(string str)
		{
			int i, len;
			string tmp;

			len = str.Length;
			tmp = "";

			for (i = 0; i < len; i++)
			{
				if (str[i] == '\\')
				{
					i++;
					switch (str[i])
					{
						case '\\':
							tmp += '\\';
							break;

						case ' ':
							tmp += ' ';
							break;

						case 'n':
						case 'N':
							tmp += '\n';
							break;

						case 'r':
						case 'R':
							tmp += '\r';
							break;

						case 't':
						case 'T':
							tmp += '\t';
							break;
					}
				}
				else
				{
					tmp += str[i];
				}
			}

			return tmp;
		}
	}
}
