# ICSharpCode.SharpZipLib.Zip.Compression.PendingBuffer - Coverage Report

# Summary

Class: | ICSharpCode.SharpZipLib.Zip.Compression.PendingBuffer
Assembly: | ICSharpCode.SharpZipLib
File(s): | C:\Users\Neil\Documents\Visual Studio 2015\Projects\icsharpcode\SZL_master\ICSharpCode.SharpZipLib\Zip\Compression\PendingBuffer.cs
Covered lines: | 40
Uncovered lines: | 18
Coverable lines: | 58
Total lines: | 255
Line coverage: | 68.9%
Branch coverage: | 90%

# Metrics

Method | Cyclomatic Complexity | Sequence Coverage | Branch Coverage
--- | --- | --- | ---
.ctor() | 1 | 0 | 0
.ctor(...) | 1 | 100 | 100
Reset() | 1 | 100 | 100
WriteByte(...) | 1 | 0 | 0
WriteShort(...) | 1 | 100 | 100
WriteInt(...) | 1 | 0 | 0
WriteBlock(...) | 1 | 100 | 100
AlignToByte() | 3 | 100 | 100
WriteBits(...) | 2 | 100 | 100
WriteShortMSB(...) | 1 | 100 | 100
Flush(...) | 3 | 76.92 | 80
ToByteArray() | 1 | 0 | 0

# File(s)

## C:\Users\Neil\Documents\Visual Studio 2015\Projects\icsharpcode\SZL_master\ICSharpCode.SharpZipLib\Zip\Compression\PendingBuffer.cs

| # | Line |  | Line coverage
--- | --- | --- | --- | ---
|  | `1` |  | `using System;`
|  | `2` |  | ``
|  | `3` |  | `namespace ICSharpCode.SharpZipLib.Zip.Compression`
|  | `4` |  | `{`
|  | `5` |  | `/// <summary>`
|  | `6` |  | `/// This class is general purpose class for writing data to a buffer.`
|  | `7` |  | `///`
|  | `8` |  | `/// It allows you to write bits as well as bytes`
|  | `9` |  | `/// Based on DeflaterPending.java`
|  | `10` |  | `///`
|  | `11` |  | `/// author of the original java version : Jochen Hoenicke`
|  | `12` |  | `/// </summary>`
|  | `13` |  | `public class PendingBuffer`
|  | `14` |  | `{`
|  | `15` |  | `readonly`
|  | `16` |  | `#region Instance Fields`
|  | `17` |  | `/// <summary>`
|  | `18` |  | `/// Internal work buffer`
|  | `19` |  | `/// </summary>`
|  | `20` |  | `byte[] buffer_;`
|  | `21` |  | ``
|  | `22` |  | `int start;`
|  | `23` |  | `int end;`
|  | `24` |  | ``
|  | `25` |  | `uint bits;`
|  | `26` |  | `int bitCount;`
|  | `27` |  | `#endregion`
|  | `28` |  | ``
|  | `29` |  | `#region Constructors`
|  | `30` |  | `/// <summary>`
|  | `31` |  | `/// construct instance using default buffer size of 4096`
|  | `32` |  | `/// </summary>`
| 0 | `33` |  | `public PendingBuffer() : this(4096)`
|  | `34` |  | `{`
| 0 | `35` |  | `}`
|  | `36` |  | ``
|  | `37` |  | `/// <summary>`
|  | `38` |  | `/// construct instance using specified buffer size`
|  | `39` |  | `/// </summary>`
|  | `40` |  | `/// <param name="bufferSize">`
|  | `41` |  | `/// size to use for internal buffer`
|  | `42` |  | `/// </param>`
| 273 | `43` |  | `public PendingBuffer(int bufferSize)`
|  | `44` |  | `{`
| 273 | `45` |  | `buffer_ = new byte[bufferSize];`
| 273 | `46` |  | `}`
|  | `47` |  | ``
|  | `48` |  | `#endregion`
|  | `49` |  | ``
|  | `50` |  | `/// <summary>`
|  | `51` |  | `/// Clear internal state/buffers`
|  | `52` |  | `/// </summary>`
|  | `53` |  | `public void Reset()`
|  | `54` |  | `{`
| 392 | `55` |  | `start = end = bitCount = 0;`
| 392 | `56` |  | `}`
|  | `57` |  | ``
|  | `58` |  | `/// <summary>`
|  | `59` |  | `/// Write a byte to buffer`
|  | `60` |  | `/// </summary>`
|  | `61` |  | `/// <param name="value">`
|  | `62` |  | `/// The value to write`
|  | `63` |  | `/// </param>`
|  | `64` |  | `public void WriteByte(int value)`
|  | `65` |  | `{`
|  | `66` |  | `#if DebugDeflation`
|  | `67` |  | `if (DeflaterConstants.DEBUGGING && (start != 0) )`
|  | `68` |  | `{`
|  | `69` |  | `throw new SharpZipBaseException("Debug check: start != 0");`
|  | `70` |  | `}`
|  | `71` |  | `#endif`
| 0 | `72` |  | `buffer_[end++] = unchecked((byte)value);`
| 0 | `73` |  | `}`
|  | `74` |  | ``
|  | `75` |  | `/// <summary>`
|  | `76` |  | `/// Write a short value to buffer LSB first`
|  | `77` |  | `/// </summary>`
|  | `78` |  | `/// <param name="value">`
|  | `79` |  | `/// The value to write.`
|  | `80` |  | `/// </param>`
|  | `81` |  | `public void WriteShort(int value)`
|  | `82` |  | `{`
|  | `83` |  | `#if DebugDeflation`
|  | `84` |  | `if (DeflaterConstants.DEBUGGING && (start != 0) )`
|  | `85` |  | `{`
|  | `86` |  | `throw new SharpZipBaseException("Debug check: start != 0");`
|  | `87` |  | `}`
|  | `88` |  | `#endif`
| 586 | `89` |  | `buffer_[end++] = unchecked((byte)value);`
| 586 | `90` |  | `buffer_[end++] = unchecked((byte)(value >> 8));`
| 586 | `91` |  | `}`
|  | `92` |  | ``
|  | `93` |  | `/// <summary>`
|  | `94` |  | `/// write an integer LSB first`
|  | `95` |  | `/// </summary>`
|  | `96` |  | `/// <param name="value">The value to write.</param>`
|  | `97` |  | `public void WriteInt(int value)`
|  | `98` |  | `{`
|  | `99` |  | `#if DebugDeflation`
|  | `100` |  | `if (DeflaterConstants.DEBUGGING && (start != 0) )`
|  | `101` |  | `{`
|  | `102` |  | `throw new SharpZipBaseException("Debug check: start != 0");`
|  | `103` |  | `}`
|  | `104` |  | `#endif`
| 0 | `105` |  | `buffer_[end++] = unchecked((byte)value);`
| 0 | `106` |  | `buffer_[end++] = unchecked((byte)(value >> 8));`
| 0 | `107` |  | `buffer_[end++] = unchecked((byte)(value >> 16));`
| 0 | `108` |  | `buffer_[end++] = unchecked((byte)(value >> 24));`
| 0 | `109` |  | `}`
|  | `110` |  | ``
|  | `111` |  | `/// <summary>`
|  | `112` |  | `/// Write a block of data to buffer`
|  | `113` |  | `/// </summary>`
|  | `114` |  | `/// <param name="block">data to write</param>`
|  | `115` |  | `/// <param name="offset">offset of first byte to write</param>`
|  | `116` |  | `/// <param name="length">number of bytes to write</param>`
|  | `117` |  | `public void WriteBlock(byte[] block, int offset, int length)`
|  | `118` |  | `{`
|  | `119` |  | `#if DebugDeflation`
|  | `120` |  | `if (DeflaterConstants.DEBUGGING && (start != 0) )`
|  | `121` |  | `{`
|  | `122` |  | `throw new SharpZipBaseException("Debug check: start != 0");`
|  | `123` |  | `}`
|  | `124` |  | `#endif`
| 293 | `125` |  | `System.Array.Copy(block, offset, buffer_, end, length);`
| 293 | `126` |  | `end += length;`
| 293 | `127` |  | `}`
|  | `128` |  | ``
|  | `129` |  | `/// <summary>`
|  | `130` |  | `/// The number of bits written to the buffer`
|  | `131` |  | `/// </summary>`
|  | `132` |  | `public int BitCount {`
|  | `133` |  | `get {`
| 0 | `134` |  | `return bitCount;`
|  | `135` |  | `}`
|  | `136` |  | `}`
|  | `137` |  | ``
|  | `138` |  | `/// <summary>`
|  | `139` |  | `/// Align internal buffer on a byte boundary`
|  | `140` |  | `/// </summary>`
|  | `141` |  | `public void AlignToByte()`
|  | `142` |  | `{`
|  | `143` |  | `#if DebugDeflation`
|  | `144` |  | `if (DeflaterConstants.DEBUGGING && (start != 0) )`
|  | `145` |  | `{`
|  | `146` |  | `throw new SharpZipBaseException("Debug check: start != 0");`
|  | `147` |  | `}`
|  | `148` |  | `#endif`
| 598 | `149` |  | `if (bitCount > 0) {`
| 531 | `150` |  | `buffer_[end++] = unchecked((byte)bits);`
| 531 | `151` |  | `if (bitCount > 8) {`
| 174 | `152` |  | `buffer_[end++] = unchecked((byte)(bits >> 8));`
|  | `153` |  | `}`
|  | `154` |  | `}`
| 598 | `155` |  | `bits = 0;`
| 598 | `156` |  | `bitCount = 0;`
| 598 | `157` |  | `}`
|  | `158` |  | ``
|  | `159` |  | `/// <summary>`
|  | `160` |  | `/// Write bits to internal buffer`
|  | `161` |  | `/// </summary>`
|  | `162` |  | `/// <param name="b">source of bits</param>`
|  | `163` |  | `/// <param name="count">number of bits to write</param>`
|  | `164` |  | `public void WriteBits(int b, int count)`
|  | `165` |  | `{`
|  | `166` |  | `#if DebugDeflation`
|  | `167` |  | `if (DeflaterConstants.DEBUGGING && (start != 0) )`
|  | `168` |  | `{`
|  | `169` |  | `throw new SharpZipBaseException("Debug check: start != 0");`
|  | `170` |  | `}`
|  | `171` |  | ``
|  | `172` |  | `// if (DeflaterConstants.DEBUGGING) {`
|  | `173` |  | `// //Console.WriteLine("writeBits("+b+","+count+")");`
|  | `174` |  | `// }`
|  | `175` |  | `#endif`
| 8954 | `176` |  | `bits |= (uint)(b << bitCount);`
| 8954 | `177` |  | `bitCount += count;`
| 8954 | `178` |  | `if (bitCount >= 16) {`
| 4181 | `179` |  | `buffer_[end++] = unchecked((byte)bits);`
| 4181 | `180` |  | `buffer_[end++] = unchecked((byte)(bits >> 8));`
| 4181 | `181` |  | `bits >>= 16;`
| 4181 | `182` |  | `bitCount -= 16;`
|  | `183` |  | `}`
| 8954 | `184` |  | `}`
|  | `185` |  | ``
|  | `186` |  | `/// <summary>`
|  | `187` |  | `/// Write a short value to internal buffer most significant byte first`
|  | `188` |  | `/// </summary>`
|  | `189` |  | `/// <param name="s">value to write</param>`
|  | `190` |  | `public void WriteShortMSB(int s)`
|  | `191` |  | `{`
|  | `192` |  | `#if DebugDeflation`
|  | `193` |  | `if (DeflaterConstants.DEBUGGING && (start != 0) )`
|  | `194` |  | `{`
|  | `195` |  | `throw new SharpZipBaseException("Debug check: start != 0");`
|  | `196` |  | `}`
|  | `197` |  | `#endif`
| 42 | `198` |  | `buffer_[end++] = unchecked((byte)(s >> 8));`
| 42 | `199` |  | `buffer_[end++] = unchecked((byte)s);`
| 42 | `200` |  | `}`
|  | `201` |  | ``
|  | `202` |  | `/// <summary>`
|  | `203` |  | `/// Indicates if buffer has been flushed`
|  | `204` |  | `/// </summary>`
|  | `205` |  | `public bool IsFlushed {`
|  | `206` |  | `get {`
| 10175 | `207` |  | `return end == 0;`
|  | `208` |  | `}`
|  | `209` |  | `}`
|  | `210` |  | ``
|  | `211` |  | `/// <summary>`
|  | `212` |  | `/// Flushes the pending buffer into the given output array. If the`
|  | `213` |  | `/// output array is to small, only a partial flush is done.`
|  | `214` |  | `/// </summary>`
|  | `215` |  | `/// <param name="output">The output array.</param>`
|  | `216` |  | `/// <param name="offset">The offset into output array.</param>`
|  | `217` |  | `/// <param name="length">The maximum number of bytes to store.</param>`
|  | `218` |  | `/// <returns>The number of bytes flushed.</returns>`
|  | `219` |  | `public int Flush(byte[] output, int offset, int length)`
|  | `220` |  | `{`
| 13248 | `221` |  | `if (bitCount >= 8) {`
| 0 | `222` |  | `buffer_[end++] = unchecked((byte)bits);`
| 0 | `223` |  | `bits >>= 8;`
| 0 | `224` |  | `bitCount -= 8;`
|  | `225` |  | `}`
|  | `226` |  | ``
| 13248 | `227` |  | `if (length > end - start) {`
| 5183 | `228` |  | `length = end - start;`
| 5183 | `229` |  | `System.Array.Copy(buffer_, start, output, offset, length);`
| 5183 | `230` |  | `start = 0;`
| 5183 | `231` |  | `end = 0;`
| 5183 | `232` |  | `} else {`
| 8065 | `233` |  | `System.Array.Copy(buffer_, start, output, offset, length);`
| 8065 | `234` |  | `start += length;`
|  | `235` |  | `}`
| 13248 | `236` |  | `return length;`
|  | `237` |  | `}`
|  | `238` |  | ``
|  | `239` |  | `/// <summary>`
|  | `240` |  | `/// Convert internal buffer to byte array.`
|  | `241` |  | `/// Buffer is empty on completion`
|  | `242` |  | `/// </summary>`
|  | `243` |  | `/// <returns>`
|  | `244` |  | `/// The internal buffer contents converted to a byte array.`
|  | `245` |  | `/// </returns>`
|  | `246` |  | `public byte[] ToByteArray()`
|  | `247` |  | `{`
| 0 | `248` |  | `byte[] result = new byte[end - start];`
| 0 | `249` |  | `System.Array.Copy(buffer_, start, result, 0, result.Length);`
| 0 | `250` |  | `start = 0;`
| 0 | `251` |  | `end = 0;`
| 0 | `252` |  | `return result;`
|  | `253` |  | `}`
|  | `254` |  | `}`
|  | `255` |  | `}`