using System;
using System.Collections;
using System.IO;
using System.Text;

namespace System.Resources
{
	// Token: 0x0200028A RID: 650
	internal class Win32ResFileReader
	{
		// Token: 0x060020D1 RID: 8401 RVA: 0x00078724 File Offset: 0x00076924
		public Win32ResFileReader(Stream s)
		{
			this.res_file = s;
		}

		// Token: 0x060020D2 RID: 8402 RVA: 0x00078734 File Offset: 0x00076934
		private int read_int16()
		{
			int num = this.res_file.ReadByte();
			if (num == -1)
			{
				return -1;
			}
			int num2 = this.res_file.ReadByte();
			if (num2 == -1)
			{
				return -1;
			}
			return num | (num2 << 8);
		}

		// Token: 0x060020D3 RID: 8403 RVA: 0x00078770 File Offset: 0x00076970
		private int read_int32()
		{
			int num = this.read_int16();
			if (num == -1)
			{
				return -1;
			}
			int num2 = this.read_int16();
			if (num2 == -1)
			{
				return -1;
			}
			return num | (num2 << 16);
		}

		// Token: 0x060020D4 RID: 8404 RVA: 0x000787A4 File Offset: 0x000769A4
		private void read_padding()
		{
			while (this.res_file.Position % 4L != 0L)
			{
				this.read_int16();
			}
		}

		// Token: 0x060020D5 RID: 8405 RVA: 0x000787C8 File Offset: 0x000769C8
		private NameOrId read_ordinal()
		{
			int num = this.read_int16();
			if ((num & 65535) != 0)
			{
				int num2 = this.read_int16();
				return new NameOrId(num2);
			}
			byte[] array = new byte[16];
			int num3 = 0;
			for (;;)
			{
				int num4 = this.read_int16();
				if (num4 == 0)
				{
					break;
				}
				if (num3 == array.Length)
				{
					byte[] array2 = new byte[array.Length * 2];
					Array.Copy(array, array2, array.Length);
					array = array2;
				}
				array[num3] = (byte)(num4 >> 8);
				array[num3 + 1] = (byte)(num4 & 255);
				num3 += 2;
			}
			return new NameOrId(new string(Encoding.Unicode.GetChars(array, 0, num3)));
		}

		// Token: 0x060020D6 RID: 8406 RVA: 0x00078870 File Offset: 0x00076A70
		public ICollection ReadResources()
		{
			ArrayList arrayList = new ArrayList();
			for (;;)
			{
				this.read_padding();
				int num = this.read_int32();
				if (num == -1)
				{
					break;
				}
				this.read_int32();
				NameOrId nameOrId = this.read_ordinal();
				NameOrId nameOrId2 = this.read_ordinal();
				this.read_padding();
				this.read_int32();
				this.read_int16();
				int num2 = this.read_int16();
				this.read_int32();
				this.read_int32();
				if (num != 0)
				{
					byte[] array = new byte[num];
					this.res_file.Read(array, 0, num);
					arrayList.Add(new Win32EncodedResource(nameOrId, nameOrId2, num2, array));
				}
			}
			return arrayList;
		}

		// Token: 0x04000BB6 RID: 2998
		private Stream res_file;
	}
}