mono/tools/locale-builder/Entry.cs

//
// Entry.cs
//
// Authors:
//	Marek Safar  <[email protected]>
//
// Copyright (C) 2012 Xamarin Inc (http://www.xamarin.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// 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.
//

using System;
using System.Text;
using System.Collections.Generic;

namespace Mono.Tools.LocaleBuilder
{
	public class Entry
	{
		// maps strings to indexes
		static Dictionary<string, int> hash = new Dictionary<string, int> ();
		static List<string> string_order = new List<string> ();
		// idx 0 is reserved to indicate null
		static int curpos = 1;

		// serialize the strings in Hashtable.
		public static string GetStrings ()
		{
			Console.WriteLine ("Total string data size: {0}", curpos);
			if (curpos > UInt16.MaxValue)
				throw new Exception ("need to increase idx size in culture-info.h");
			StringBuilder ret = new StringBuilder ();
			// the null entry
			ret.Append ("\"\\0\"\n");
			foreach (string s in string_order) {
				ret.Append ("\t\"");
				ret.Append (s);
				ret.Append ("\\0\"\n");
			}
			return ret.ToString ();
		}

		static int AddString (string s, int size)
		{
			if (!hash.ContainsKey (s)) {
				int ret;
				string_order.Add (s);
				ret = curpos;
				hash.Add (s, curpos);
				curpos += size + 1; // null terminator
				return ret;
			}

			return hash[s];
		}

		protected static StringBuilder AppendNames (StringBuilder builder, IList<string> names)
		{
			builder.Append ('{');
			for (int i = 0; i < names.Count; i++) {
				if (i > 0)
					builder.Append (", ");

				builder.Append (EncodeStringIdx (names[i]));
			}
			builder.Append ("}");

			return builder;
		}

		internal static String EncodeStringIdx (string str)
		{
			if (str == null)
				return "0";

			StringBuilder ret = new StringBuilder ();
			byte[] ba = new UTF8Encoding ().GetBytes (str);
			bool in_hex = false;
			foreach (byte b in ba) {
				if (b > 127 || (in_hex && is_hex (b))) {
					ret.AppendFormat ("\\x{0:x}", b);
					in_hex = true;
				} else {
					if (b == '\\')
						ret.Append ('\\');
					ret.Append ((char) b);
					in_hex = false;
				}
			}
			int res = AddString (ret.ToString (), ba.Length);
			return res.ToString ();
		}

		private static bool is_hex (int e)
		{
			return (e >= '0' && e <= '9') || (e >= 'A' && e <= 'F') || (e >= 'a' && e <= 'f');
		}
	}
}