Dec2017-Script-Dump/ICSharpCode.SharpZipLib/Zip/Compression/Streams/InflaterInputBuffer.cs

using System;
using System.IO;
using System.Security.Cryptography;

namespace ICSharpCode.SharpZipLib.Zip.Compression.Streams
{
	// Token: 0x0200003C RID: 60
	public class InflaterInputBuffer
	{
		// Token: 0x06000251 RID: 593 RVA: 0x0000C425 File Offset: 0x0000B425
		public InflaterInputBuffer(Stream stream)
			: this(stream, 4096)
		{
		}

		// Token: 0x06000252 RID: 594 RVA: 0x0000C433 File Offset: 0x0000B433
		public InflaterInputBuffer(Stream stream, int bufferSize)
		{
			this.inputStream = stream;
			if (bufferSize < 1024)
			{
				bufferSize = 1024;
			}
			this.rawData = new byte[bufferSize];
			this.clearText = this.rawData;
		}

		// Token: 0x17000083 RID: 131
		// (get) Token: 0x06000253 RID: 595 RVA: 0x0000C469 File Offset: 0x0000B469
		public int RawLength
		{
			get
			{
				return this.rawLength;
			}
		}

		// Token: 0x17000084 RID: 132
		// (get) Token: 0x06000254 RID: 596 RVA: 0x0000C471 File Offset: 0x0000B471
		public byte[] RawData
		{
			get
			{
				return this.rawData;
			}
		}

		// Token: 0x17000085 RID: 133
		// (get) Token: 0x06000255 RID: 597 RVA: 0x0000C479 File Offset: 0x0000B479
		public int ClearTextLength
		{
			get
			{
				return this.clearTextLength;
			}
		}

		// Token: 0x17000086 RID: 134
		// (get) Token: 0x06000256 RID: 598 RVA: 0x0000C481 File Offset: 0x0000B481
		public byte[] ClearText
		{
			get
			{
				return this.clearText;
			}
		}

		// Token: 0x17000087 RID: 135
		// (get) Token: 0x06000257 RID: 599 RVA: 0x0000C489 File Offset: 0x0000B489
		// (set) Token: 0x06000258 RID: 600 RVA: 0x0000C491 File Offset: 0x0000B491
		public int Available
		{
			get
			{
				return this.available;
			}
			set
			{
				this.available = value;
			}
		}

		// Token: 0x06000259 RID: 601 RVA: 0x0000C49A File Offset: 0x0000B49A
		public void SetInflaterInput(Inflater inflater)
		{
			if (this.available > 0)
			{
				inflater.SetInput(this.clearText, this.clearTextLength - this.available, this.available);
				this.available = 0;
			}
		}

		// Token: 0x0600025A RID: 602 RVA: 0x0000C4CC File Offset: 0x0000B4CC
		public void Fill()
		{
			this.rawLength = 0;
			int num;
			for (int i = this.rawData.Length; i > 0; i -= num)
			{
				num = this.inputStream.Read(this.rawData, this.rawLength, i);
				if (num <= 0)
				{
					break;
				}
				this.rawLength += num;
			}
			if (this.cryptoTransform != null)
			{
				this.clearTextLength = this.cryptoTransform.TransformBlock(this.rawData, 0, this.rawLength, this.clearText, 0);
			}
			else
			{
				this.clearTextLength = this.rawLength;
			}
			this.available = this.clearTextLength;
		}

		// Token: 0x0600025B RID: 603 RVA: 0x0000C565 File Offset: 0x0000B565
		public int ReadRawBuffer(byte[] buffer)
		{
			return this.ReadRawBuffer(buffer, 0, buffer.Length);
		}

		// Token: 0x0600025C RID: 604 RVA: 0x0000C574 File Offset: 0x0000B574
		public int ReadRawBuffer(byte[] outBuffer, int offset, int length)
		{
			if (length < 0)
			{
				throw new ArgumentOutOfRangeException("length");
			}
			int num = offset;
			int i = length;
			while (i > 0)
			{
				if (this.available <= 0)
				{
					this.Fill();
					if (this.available <= 0)
					{
						return 0;
					}
				}
				int num2 = Math.Min(i, this.available);
				Array.Copy(this.rawData, this.rawLength - this.available, outBuffer, num, num2);
				num += num2;
				i -= num2;
				this.available -= num2;
			}
			return length;
		}

		// Token: 0x0600025D RID: 605 RVA: 0x0000C5F4 File Offset: 0x0000B5F4
		public int ReadClearTextBuffer(byte[] outBuffer, int offset, int length)
		{
			if (length < 0)
			{
				throw new ArgumentOutOfRangeException("length");
			}
			int num = offset;
			int i = length;
			while (i > 0)
			{
				if (this.available <= 0)
				{
					this.Fill();
					if (this.available <= 0)
					{
						return 0;
					}
				}
				int num2 = Math.Min(i, this.available);
				Array.Copy(this.clearText, this.clearTextLength - this.available, outBuffer, num, num2);
				num += num2;
				i -= num2;
				this.available -= num2;
			}
			return length;
		}

		// Token: 0x0600025E RID: 606 RVA: 0x0000C674 File Offset: 0x0000B674
		public int ReadLeByte()
		{
			if (this.available <= 0)
			{
				this.Fill();
				if (this.available <= 0)
				{
					throw new ZipException("EOF in header");
				}
			}
			byte b = this.rawData[this.rawLength - this.available];
			this.available--;
			return (int)b;
		}

		// Token: 0x0600025F RID: 607 RVA: 0x0000C6C8 File Offset: 0x0000B6C8
		public int ReadLeShort()
		{
			return this.ReadLeByte() | (this.ReadLeByte() << 8);
		}

		// Token: 0x06000260 RID: 608 RVA: 0x0000C6D9 File Offset: 0x0000B6D9
		public int ReadLeInt()
		{
			return this.ReadLeShort() | (this.ReadLeShort() << 16);
		}

		// Token: 0x06000261 RID: 609 RVA: 0x0000C6EB File Offset: 0x0000B6EB
		public long ReadLeLong()
		{
			return (long)((ulong)this.ReadLeInt() | (ulong)((ulong)((long)this.ReadLeInt()) << 32));
		}

		// Token: 0x17000088 RID: 136
		// (set) Token: 0x06000262 RID: 610 RVA: 0x0000C700 File Offset: 0x0000B700
		public ICryptoTransform CryptoTransform
		{
			set
			{
				this.cryptoTransform = value;
				if (this.cryptoTransform != null)
				{
					if (this.rawData == this.clearText)
					{
						if (this.internalClearText == null)
						{
							this.internalClearText = new byte[this.rawData.Length];
						}
						this.clearText = this.internalClearText;
					}
					this.clearTextLength = this.rawLength;
					if (this.available > 0)
					{
						this.cryptoTransform.TransformBlock(this.rawData, this.rawLength - this.available, this.available, this.clearText, this.rawLength - this.available);
						return;
					}
				}
				else
				{
					this.clearText = this.rawData;
					this.clearTextLength = this.rawLength;
				}
			}
		}

		// Token: 0x04000148 RID: 328
		private int rawLength;

		// Token: 0x04000149 RID: 329
		private byte[] rawData;

		// Token: 0x0400014A RID: 330
		private int clearTextLength;

		// Token: 0x0400014B RID: 331
		private byte[] clearText;

		// Token: 0x0400014C RID: 332
		private byte[] internalClearText;

		// Token: 0x0400014D RID: 333
		private int available;

		// Token: 0x0400014E RID: 334
		private ICryptoTransform cryptoTransform;

		// Token: 0x0400014F RID: 335
		private Stream inputStream;
	}
}