Cosmos/source/Indy.IL2CPU/CustomImplementation/System/StringImpl.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using Indy.IL2CPU.Plugs;

namespace Indy.IL2CPU.CustomImplementation.System {
	[Plug(Target = typeof(String))]
	public static class StringImpl {
		[MethodAlias(Name = "System.String System.String.FastAllocateString(System.Int32)")]
		[PlugMethod(Enabled = false)]
		public static String FastAllocateString(int aLength) {
			Char[] xItems = new Char[aLength];
			return new String(xItems);
		}

		[MethodAlias(Name = "System.Void System.String..ctor(System.Char[],System.Int32,System.Int32)")]
		[PlugMethod(Enabled = false)]
		public static void Ctor(String aThis, [FieldAccess(Name = "$$Storage$$")]ref Char[] aStorage, Char[] aChars, int aStartIndex, int aLength) {
			Char[] newChars = new Char[aLength];
			Array.Copy(aChars, aStartIndex, newChars, 0, aLength);
			aStorage = newChars;
		}

		[MethodAlias(Name = "System.Void System.String..ctor(System.Char[])")]
		[PlugMethod(Enabled = false)]
		public static void Ctor(String aThis, [FieldAccess(Name = "$$Storage$$")] ref Char[] aStorage, Char[] aChars) {
			aStorage = aChars;
		}

		public static int IndexOf(string aThis, char c) {
			for (int i = 0; i < aThis.Length; i++) {
				if (aThis[i] == c) {
					return i;
				}
			}
			return -1;
		}

        public static string Substring(string aThis, int startpos)
        {
            char[] cs = new char[aThis.Length - startpos];

            int j = 0;
            for (int i = startpos; i < aThis.Length; i++)
                cs[j++] = aThis[i];

            return new string(cs);
        }

        public static string Substring(string aThis, int startpos, int length)
        {
            if (startpos + length > aThis.Length)
                length = aThis.Length - startpos;

            char[] cs = new char[length];

            int j = 0;
            for (int i = startpos; i < startpos + length; i++)
                cs[j++] = aThis[i];

            return new string(cs);
        }

        // HACK: We need to redo this once char support is complete (only returns 0, -1).
        public static int CompareTo(string aThis, string other)
        {
            if (aThis.Length != other.Length)
                return -1;
            for (int i = 0; i < aThis.Length; i++)
                if (aThis[i] != other[i])
                    return -1;
            return 0;
        }

        [PlugMethod(Enabled = false)]
		public static uint GetStorage(string aString) {
			return 0;
		}
	}
}