ICSharpCode.SharpZipLib.Zip.Compression.Deflater - Coverage Report

# Summary

Class: | ICSharpCode.SharpZipLib.Zip.Compression.Deflater
Assembly: | ICSharpCode.SharpZipLib
File(s): | C:\Users\Neil\Documents\Visual Studio 2015\Projects\icsharpcode\SZL_master\ICSharpCode.SharpZipLib\Zip\Compression\Deflater.cs
Covered lines: | 69
Uncovered lines: | 29
Coverable lines: | 98
Total lines: | 521
Line coverage: | 70.4%
Branch coverage: | 68%

# Metrics

Method | Cyclomatic Complexity | Sequence Coverage | Branch Coverage
--- | --- | --- | ---
.ctor() | 1 | 100 | 100
.ctor(...) | 1 | 0 | 0
.ctor(...) | 4 | 92.31 | 71.43
Reset() | 3 | 100 | 100
Flush() | 1 | 100 | 100
Finish() | 1 | 100 | 100
SetInput(...) | 1 | 0 | 0
SetInput(...) | 2 | 75 | 66.67
SetLevel(...) | 5 | 88.89 | 77.78
GetLevel() | 1 | 100 | 100
SetStrategy(...) | 1 | 100 | 100
Deflate(...) | 1 | 0 | 0
Deflate(...) | 16 | 69.05 | 70.97
SetDictionary(...) | 1 | 0 | 0
SetDictionary(...) | 2 | 0 | 0

# File(s)

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

| # | Line |  | Line coverage
--- | --- | --- | --- | ---
|  | `1` |  | `using System;`
|  | `2` |  | ``
|  | `3` |  | `namespace ICSharpCode.SharpZipLib.Zip.Compression`
|  | `4` |  | `{`
|  | `5` |  | `/// <summary>`
|  | `6` |  | `/// This is the Deflater class. The deflater class compresses input`
|  | `7` |  | `/// with the deflate algorithm described in RFC 1951. It has several`
|  | `8` |  | `/// compression levels and three different strategies described below.`
|  | `9` |  | `///`
|  | `10` |  | `/// This class is <i>not</i> thread safe. This is inherent in the API, due`
|  | `11` |  | `/// to the split of deflate and setInput.`
|  | `12` |  | `///`
|  | `13` |  | `/// author of the original java version : Jochen Hoenicke`
|  | `14` |  | `/// </summary>`
|  | `15` |  | `public class Deflater`
|  | `16` |  | `{`
|  | `17` |  | `#region Deflater Documentation`
|  | `18` |  | `/*`
|  | `19` |  | `* The Deflater can do the following state transitions:`
|  | `20` |  | `*`
|  | `21` |  | `* (1) -> INIT_STATE ----> INIT_FINISHING_STATE ---.`
|  | `22` |  | `* / | (2) (5) |`
|  | `23` |  | `* / v (5) |`
|  | `24` |  | `* (3)| SETDICT_STATE ---> SETDICT_FINISHING_STATE |(3)`
|  | `25` |  | `* \ | (3) | ,--------'`
|  | `26` |  | `* | | | (3) /`
|  | `27` |  | `* v v (5) v v`
|  | `28` |  | `* (1) -> BUSY_STATE ----> FINISHING_STATE`
|  | `29` |  | `* | (6)`
|  | `30` |  | `* v`
|  | `31` |  | `* FINISHED_STATE`
|  | `32` |  | `* \_____________________________________/`
|  | `33` |  | `* | (7)`
|  | `34` |  | `* v`
|  | `35` |  | `* CLOSED_STATE`
|  | `36` |  | `*`
|  | `37` |  | `* (1) If we should produce a header we start in INIT_STATE, otherwise`
|  | `38` |  | `* we start in BUSY_STATE.`
|  | `39` |  | `* (2) A dictionary may be set only when we are in INIT_STATE, then`
|  | `40` |  | `* we change the state as indicated.`
|  | `41` |  | `* (3) Whether a dictionary is set or not, on the first call of deflate`
|  | `42` |  | `* we change to BUSY_STATE.`
|  | `43` |  | `* (4) -- intentionally left blank -- :)`
|  | `44` |  | `* (5) FINISHING_STATE is entered, when flush() is called to indicate that`
|  | `45` |  | `* there is no more INPUT. There are also states indicating, that`
|  | `46` |  | `* the header wasn't written yet.`
|  | `47` |  | `* (6) FINISHED_STATE is entered, when everything has been flushed to the`
|  | `48` |  | `* internal pending output buffer.`
|  | `49` |  | `* (7) At any time (7)`
|  | `50` |  | `*`
|  | `51` |  | `*/`
|  | `52` |  | `#endregion`
|  | `53` |  | `#region Public Constants`
|  | `54` |  | `/// <summary>`
|  | `55` |  | `/// The best and slowest compression level. This tries to find very`
|  | `56` |  | `/// long and distant string repetitions.`
|  | `57` |  | `/// </summary>`
|  | `58` |  | `public const int BEST_COMPRESSION = 9;`
|  | `59` |  | ``
|  | `60` |  | `/// <summary>`
|  | `61` |  | `/// The worst but fastest compression level.`
|  | `62` |  | `/// </summary>`
|  | `63` |  | `public const int BEST_SPEED = 1;`
|  | `64` |  | ``
|  | `65` |  | `/// <summary>`
|  | `66` |  | `/// The default compression level.`
|  | `67` |  | `/// </summary>`
|  | `68` |  | `public const int DEFAULT_COMPRESSION = -1;`
|  | `69` |  | ``
|  | `70` |  | `/// <summary>`
|  | `71` |  | `/// This level won't compress at all but output uncompressed blocks.`
|  | `72` |  | `/// </summary>`
|  | `73` |  | `public const int NO_COMPRESSION = 0;`
|  | `74` |  | ``
|  | `75` |  | `/// <summary>`
|  | `76` |  | `/// The compression method. This is the only method supported so far.`
|  | `77` |  | `/// There is no need to use this constant at all.`
|  | `78` |  | `/// </summary>`
|  | `79` |  | `public const int DEFLATED = 8;`
|  | `80` |  | `#endregion`
|  | `81` |  | `#region Local Constants`
|  | `82` |  | `private const int IS_SETDICT = 0x01;`
|  | `83` |  | `private const int IS_FLUSHING = 0x04;`
|  | `84` |  | `private const int IS_FINISHING = 0x08;`
|  | `85` |  | ``
|  | `86` |  | `private const int INIT_STATE = 0x00;`
|  | `87` |  | `private const int SETDICT_STATE = 0x01;`
|  | `88` |  | `// private static int INIT_FINISHING_STATE = 0x08;`
|  | `89` |  | `// private static int SETDICT_FINISHING_STATE = 0x09;`
|  | `90` |  | `private const int BUSY_STATE = 0x10;`
|  | `91` |  | `private const int FLUSHING_STATE = 0x14;`
|  | `92` |  | `private const int FINISHING_STATE = 0x1c;`
|  | `93` |  | `private const int FINISHED_STATE = 0x1e;`
|  | `94` |  | `private const int CLOSED_STATE = 0x7f;`
|  | `95` |  | `#endregion`
|  | `96` |  | `#region Constructors`
|  | `97` |  | `/// <summary>`
|  | `98` |  | `/// Creates a new deflater with default compression level.`
|  | `99` |  | `/// </summary>`
| 4 | `100` |  | `public Deflater() : this(DEFAULT_COMPRESSION, false)`
|  | `101` |  | `{`
|  | `102` |  | ``
| 4 | `103` |  | `}`
|  | `104` |  | ``
|  | `105` |  | `/// <summary>`
|  | `106` |  | `/// Creates a new deflater with given compression level.`
|  | `107` |  | `/// </summary>`
|  | `108` |  | `/// <param name="level">`
|  | `109` |  | `/// the compression level, a value between NO_COMPRESSION`
|  | `110` |  | `/// and BEST_COMPRESSION, or DEFAULT_COMPRESSION.`
|  | `111` |  | `/// </param>`
|  | `112` |  | `/// <exception cref="System.ArgumentOutOfRangeException">if lvl is out of range.</exception>`
| 0 | `113` |  | `public Deflater(int level) : this(level, false)`
|  | `114` |  | `{`
|  | `115` |  | ``
| 0 | `116` |  | `}`
|  | `117` |  | ``
|  | `118` |  | `/// <summary>`
|  | `119` |  | `/// Creates a new deflater with given compression level.`
|  | `120` |  | `/// </summary>`
|  | `121` |  | `/// <param name="level">`
|  | `122` |  | `/// the compression level, a value between NO_COMPRESSION`
|  | `123` |  | `/// and BEST_COMPRESSION.`
|  | `124` |  | `/// </param>`
|  | `125` |  | `/// <param name="noZlibHeaderOrFooter">`
|  | `126` |  | `/// true, if we should suppress the Zlib/RFC1950 header at the`
|  | `127` |  | `/// beginning and the adler checksum at the end of the output. This is`
|  | `128` |  | `/// useful for the GZIP/PKZIP formats.`
|  | `129` |  | `/// </param>`
|  | `130` |  | `/// <exception cref="System.ArgumentOutOfRangeException">if lvl is out of range.</exception>`
| 273 | `131` |  | `public Deflater(int level, bool noZlibHeaderOrFooter)`
|  | `132` |  | `{`
| 273 | `133` |  | `if (level == DEFAULT_COMPRESSION) {`
| 100 | `134` |  | `level = 6;`
| 273 | `135` |  | `} else if (level < NO_COMPRESSION || level > BEST_COMPRESSION) {`
| 0 | `136` |  | `throw new ArgumentOutOfRangeException(nameof(level));`
|  | `137` |  | `}`
|  | `138` |  | ``
| 273 | `139` |  | `pending = new DeflaterPending();`
| 273 | `140` |  | `engine = new DeflaterEngine(pending);`
| 273 | `141` |  | `this.noZlibHeaderOrFooter = noZlibHeaderOrFooter;`
| 273 | `142` |  | `SetStrategy(DeflateStrategy.Default);`
| 273 | `143` |  | `SetLevel(level);`
| 273 | `144` |  | `Reset();`
| 273 | `145` |  | `}`
|  | `146` |  | `#endregion`
|  | `147` |  | ``
|  | `148` |  | `/// <summary>`
|  | `149` |  | `/// Resets the deflater. The deflater acts afterwards as if it was`
|  | `150` |  | `/// just created with the same compression level and strategy as it`
|  | `151` |  | `/// had before.`
|  | `152` |  | `/// </summary>`
|  | `153` |  | `public void Reset()`
|  | `154` |  | `{`
| 392 | `155` |  | `state = (noZlibHeaderOrFooter ? BUSY_STATE : INIT_STATE);`
| 392 | `156` |  | `totalOut = 0;`
| 392 | `157` |  | `pending.Reset();`
| 392 | `158` |  | `engine.Reset();`
| 392 | `159` |  | `}`
|  | `160` |  | ``
|  | `161` |  | `/// <summary>`
|  | `162` |  | `/// Gets the current adler checksum of the data that was processed so far.`
|  | `163` |  | `/// </summary>`
|  | `164` |  | `public int Adler {`
|  | `165` |  | `get {`
| 0 | `166` |  | `return engine.Adler;`
|  | `167` |  | `}`
|  | `168` |  | `}`
|  | `169` |  | ``
|  | `170` |  | `/// <summary>`
|  | `171` |  | `/// Gets the number of input bytes processed so far.`
|  | `172` |  | `/// </summary>`
|  | `173` |  | `public long TotalIn {`
|  | `174` |  | `get {`
| 9 | `175` |  | `return engine.TotalIn;`
|  | `176` |  | `}`
|  | `177` |  | `}`
|  | `178` |  | ``
|  | `179` |  | `/// <summary>`
|  | `180` |  | `/// Gets the number of output bytes so far.`
|  | `181` |  | `/// </summary>`
|  | `182` |  | `public long TotalOut {`
|  | `183` |  | `get {`
| 119 | `184` |  | `return totalOut;`
|  | `185` |  | `}`
|  | `186` |  | `}`
|  | `187` |  | ``
|  | `188` |  | `/// <summary>`
|  | `189` |  | `/// Flushes the current input block. Further calls to deflate() will`
|  | `190` |  | `/// produce enough output to inflate everything in the current input`
|  | `191` |  | `/// block. This is not part of Sun's JDK so I have made it package`
|  | `192` |  | `/// private. It is used by DeflaterOutputStream to implement`
|  | `193` |  | `/// flush().`
|  | `194` |  | `/// </summary>`
|  | `195` |  | `public void Flush()`
|  | `196` |  | `{`
| 30 | `197` |  | `state |= IS_FLUSHING;`
| 30 | `198` |  | `}`
|  | `199` |  | ``
|  | `200` |  | `/// <summary>`
|  | `201` |  | `/// Finishes the deflater with the current input block. It is an error`
|  | `202` |  | `/// to give more input after this method was called. This method must`
|  | `203` |  | `/// be called to force all bytes to be flushed.`
|  | `204` |  | `/// </summary>`
|  | `205` |  | `public void Finish()`
|  | `206` |  | `{`
| 325 | `207` |  | `state |= (IS_FLUSHING | IS_FINISHING);`
| 325 | `208` |  | `}`
|  | `209` |  | ``
|  | `210` |  | `/// <summary>`
|  | `211` |  | `/// Returns true if the stream was finished and no more output bytes`
|  | `212` |  | `/// are available.`
|  | `213` |  | `/// </summary>`
|  | `214` |  | `public bool IsFinished {`
|  | `215` |  | `get {`
| 1898 | `216` |  | `return (state == FINISHED_STATE) && pending.IsFlushed;`
|  | `217` |  | `}`
|  | `218` |  | `}`
|  | `219` |  | ``
|  | `220` |  | `/// <summary>`
|  | `221` |  | `/// Returns true, if the input buffer is empty.`
|  | `222` |  | `/// You should then call setInput().`
|  | `223` |  | `/// NOTE: This method can also return true when the stream`
|  | `224` |  | `/// was finished.`
|  | `225` |  | `/// </summary>`
|  | `226` |  | `public bool IsNeedingInput {`
|  | `227` |  | `get {`
| 16258 | `228` |  | `return engine.NeedsInput();`
|  | `229` |  | `}`
|  | `230` |  | `}`
|  | `231` |  | ``
|  | `232` |  | `/// <summary>`
|  | `233` |  | `/// Sets the data which should be compressed next. This should be only`
|  | `234` |  | `/// called when needsInput indicates that more input is needed.`
|  | `235` |  | `/// If you call setInput when needsInput() returns false, the`
|  | `236` |  | `/// previous input that is still pending will be thrown away.`
|  | `237` |  | `/// The given byte array should not be changed, before needsInput() returns`
|  | `238` |  | `/// true again.`
|  | `239` |  | `/// This call is equivalent to <code>setInput(input, 0, input.length)</code>.`
|  | `240` |  | `/// </summary>`
|  | `241` |  | `/// <param name="input">`
|  | `242` |  | `/// the buffer containing the input data.`
|  | `243` |  | `/// </param>`
|  | `244` |  | `/// <exception cref="System.InvalidOperationException">`
|  | `245` |  | `/// if the buffer was finished() or ended().`
|  | `246` |  | `/// </exception>`
|  | `247` |  | `public void SetInput(byte[] input)`
|  | `248` |  | `{`
| 0 | `249` |  | `SetInput(input, 0, input.Length);`
| 0 | `250` |  | `}`
|  | `251` |  | ``
|  | `252` |  | `/// <summary>`
|  | `253` |  | `/// Sets the data which should be compressed next. This should be`
|  | `254` |  | `/// only called when needsInput indicates that more input is needed.`
|  | `255` |  | `/// The given byte array should not be changed, before needsInput() returns`
|  | `256` |  | `/// true again.`
|  | `257` |  | `/// </summary>`
|  | `258` |  | `/// <param name="input">`
|  | `259` |  | `/// the buffer containing the input data.`
|  | `260` |  | `/// </param>`
|  | `261` |  | `/// <param name="offset">`
|  | `262` |  | `/// the start of the data.`
|  | `263` |  | `/// </param>`
|  | `264` |  | `/// <param name="count">`
|  | `265` |  | `/// the number of data bytes of input.`
|  | `266` |  | `/// </param>`
|  | `267` |  | `/// <exception cref="System.InvalidOperationException">`
|  | `268` |  | `/// if the buffer was Finish()ed or if previous input is still pending.`
|  | `269` |  | `/// </exception>`
|  | `270` |  | `public void SetInput(byte[] input, int offset, int count)`
|  | `271` |  | `{`
| 4479 | `272` |  | `if ((state & IS_FINISHING) != 0) {`
| 0 | `273` |  | `throw new InvalidOperationException("Finish() already called");`
|  | `274` |  | `}`
| 4479 | `275` |  | `engine.SetInput(input, offset, count);`
| 4479 | `276` |  | `}`
|  | `277` |  | ``
|  | `278` |  | `/// <summary>`
|  | `279` |  | `/// Sets the compression level. There is no guarantee of the exact`
|  | `280` |  | `/// position of the change, but if you call this when needsInput is`
|  | `281` |  | `/// true the change of compression level will occur somewhere near`
|  | `282` |  | `/// before the end of the so far given input.`
|  | `283` |  | `/// </summary>`
|  | `284` |  | `/// <param name="level">`
|  | `285` |  | `/// the new compression level.`
|  | `286` |  | `/// </param>`
|  | `287` |  | `public void SetLevel(int level)`
|  | `288` |  | `{`
| 447 | `289` |  | `if (level == DEFAULT_COMPRESSION) {`
| 59 | `290` |  | `level = 6;`
| 447 | `291` |  | `} else if (level < NO_COMPRESSION || level > BEST_COMPRESSION) {`
| 0 | `292` |  | `throw new ArgumentOutOfRangeException(nameof(level));`
|  | `293` |  | `}`
|  | `294` |  | ``
| 447 | `295` |  | `if (this.level != level) {`
| 327 | `296` |  | `this.level = level;`
| 327 | `297` |  | `engine.SetLevel(level);`
|  | `298` |  | `}`
| 447 | `299` |  | `}`
|  | `300` |  | ``
|  | `301` |  | `/// <summary>`
|  | `302` |  | `/// Get current compression level`
|  | `303` |  | `/// </summary>`
|  | `304` |  | `/// <returns>Returns the current compression level</returns>`
|  | `305` |  | `public int GetLevel()`
|  | `306` |  | `{`
| 3 | `307` |  | `return level;`
|  | `308` |  | `}`
|  | `309` |  | ``
|  | `310` |  | `/// <summary>`
|  | `311` |  | `/// Sets the compression strategy. Strategy is one of`
|  | `312` |  | `/// DEFAULT_STRATEGY, HUFFMAN_ONLY and FILTERED. For the exact`
|  | `313` |  | `/// position where the strategy is changed, the same as for`
|  | `314` |  | `/// SetLevel() applies.`
|  | `315` |  | `/// </summary>`
|  | `316` |  | `/// <param name="strategy">`
|  | `317` |  | `/// The new compression strategy.`
|  | `318` |  | `/// </param>`
|  | `319` |  | `public void SetStrategy(DeflateStrategy strategy)`
|  | `320` |  | `{`
| 273 | `321` |  | `engine.Strategy = strategy;`
| 273 | `322` |  | `}`
|  | `323` |  | ``
|  | `324` |  | `/// <summary>`
|  | `325` |  | `/// Deflates the current input block with to the given array.`
|  | `326` |  | `/// </summary>`
|  | `327` |  | `/// <param name="output">`
|  | `328` |  | `/// The buffer where compressed data is stored`
|  | `329` |  | `/// </param>`
|  | `330` |  | `/// <returns>`
|  | `331` |  | `/// The number of compressed bytes added to the output, or 0 if either`
|  | `332` |  | `/// IsNeedingInput() or IsFinished returns true or length is zero.`
|  | `333` |  | `/// </returns>`
|  | `334` |  | `public int Deflate(byte[] output)`
|  | `335` |  | `{`
| 0 | `336` |  | `return Deflate(output, 0, output.Length);`
|  | `337` |  | `}`
|  | `338` |  | ``
|  | `339` |  | `/// <summary>`
|  | `340` |  | `/// Deflates the current input block to the given array.`
|  | `341` |  | `/// </summary>`
|  | `342` |  | `/// <param name="output">`
|  | `343` |  | `/// Buffer to store the compressed data.`
|  | `344` |  | `/// </param>`
|  | `345` |  | `/// <param name="offset">`
|  | `346` |  | `/// Offset into the output array.`
|  | `347` |  | `/// </param>`
|  | `348` |  | `/// <param name="length">`
|  | `349` |  | `/// The maximum number of bytes that may be stored.`
|  | `350` |  | `/// </param>`
|  | `351` |  | `/// <returns>`
|  | `352` |  | `/// The number of compressed bytes added to the output, or 0 if either`
|  | `353` |  | `/// needsInput() or finished() returns true or length is zero.`
|  | `354` |  | `/// </returns>`
|  | `355` |  | `/// <exception cref="System.InvalidOperationException">`
|  | `356` |  | `/// If Finish() was previously called.`
|  | `357` |  | `/// </exception>`
|  | `358` |  | `/// <exception cref="System.ArgumentOutOfRangeException">`
|  | `359` |  | `/// If offset or length don't match the array length.`
|  | `360` |  | `/// </exception>`
|  | `361` |  | `public int Deflate(byte[] output, int offset, int length)`
|  | `362` |  | `{`
| 12717 | `363` |  | `int origLength = length;`
|  | `364` |  | ``
| 12717 | `365` |  | `if (state == CLOSED_STATE) {`
| 0 | `366` |  | `throw new InvalidOperationException("Deflater closed");`
|  | `367` |  | `}`
|  | `368` |  | ``
| 12717 | `369` |  | `if (state < BUSY_STATE) {`
|  | `370` |  | `// output header`
| 14 | `371` |  | `int header = (DEFLATED +`
| 14 | `372` |  | `((DeflaterConstants.MAX_WBITS - 8) << 4)) << 8;`
| 14 | `373` |  | `int level_flags = (level - 1) >> 1;`
| 14 | `374` |  | `if (level_flags < 0 || level_flags > 3) {`
| 2 | `375` |  | `level_flags = 3;`
|  | `376` |  | `}`
| 14 | `377` |  | `header |= level_flags << 6;`
| 14 | `378` |  | `if ((state & IS_SETDICT) != 0) {`
|  | `379` |  | `// Dictionary was set`
| 0 | `380` |  | `header |= DeflaterConstants.PRESET_DICT;`
|  | `381` |  | `}`
| 14 | `382` |  | `header += 31 - (header % 31);`
|  | `383` |  | ``
| 14 | `384` |  | `pending.WriteShortMSB(header);`
| 14 | `385` |  | `if ((state & IS_SETDICT) != 0) {`
| 0 | `386` |  | `int chksum = engine.Adler;`
| 0 | `387` |  | `engine.ResetAdler();`
| 0 | `388` |  | `pending.WriteShortMSB(chksum >> 16);`
| 0 | `389` |  | `pending.WriteShortMSB(chksum & 0xffff);`
|  | `390` |  | `}`
|  | `391` |  | ``
| 14 | `392` |  | `state = BUSY_STATE | (state & (IS_FLUSHING | IS_FINISHING));`
|  | `393` |  | `}`
|  | `394` |  | ``
|  | `395` |  | `for (;;) {`
| 13248 | `396` |  | `int count = pending.Flush(output, offset, length);`
| 13248 | `397` |  | `offset += count;`
| 13248 | `398` |  | `totalOut += count;`
| 13248 | `399` |  | `length -= count;`
|  | `400` |  | ``
| 13248 | `401` |  | `if (length == 0 || state == FINISHED_STATE) {`
|  | `402` |  | `break;`
|  | `403` |  | `}`
|  | `404` |  | ``
| 4878 | `405` |  | `if (!engine.Deflate((state & IS_FLUSHING) != 0, (state & IS_FINISHING) != 0)) {`
| 4652 | `406` |  | `switch (state) {`
|  | `407` |  | `case BUSY_STATE:`
|  | `408` |  | `// We need more input now`
| 4347 | `409` |  | `return origLength - length;`
|  | `410` |  | `case FLUSHING_STATE:`
| 0 | `411` |  | `if (level != NO_COMPRESSION) {`
|  | `412` |  | `/* We have to supply some lookahead. 8 bit lookahead`
|  | `413` |  | `* is needed by the zlib inflater, and we must fill`
|  | `414` |  | `* the next byte, so that all bits are flushed.`
|  | `415` |  | `*/`
| 0 | `416` |  | `int neededbits = 8 + ((-pending.BitCount) & 7);`
| 0 | `417` |  | `while (neededbits > 0) {`
|  | `418` |  | `/* write a static tree block consisting solely of`
|  | `419` |  | `* an EOF:`
|  | `420` |  | `*/`
| 0 | `421` |  | `pending.WriteBits(2, 10);`
| 0 | `422` |  | `neededbits -= 10;`
|  | `423` |  | `}`
|  | `424` |  | `}`
| 0 | `425` |  | `state = BUSY_STATE;`
| 0 | `426` |  | `break;`
|  | `427` |  | `case FINISHING_STATE:`
| 305 | `428` |  | `pending.AlignToByte();`
|  | `429` |  | ``
|  | `430` |  | `// Compressed data is complete. Write footer information if required.`
| 305 | `431` |  | `if (!noZlibHeaderOrFooter) {`
| 14 | `432` |  | `int adler = engine.Adler;`
| 14 | `433` |  | `pending.WriteShortMSB(adler >> 16);`
| 14 | `434` |  | `pending.WriteShortMSB(adler & 0xffff);`
|  | `435` |  | `}`
| 305 | `436` |  | `state = FINISHED_STATE;`
| 305 | `437` |  | `break;`
|  | `438` |  | `}`
|  | `439` |  | `}`
|  | `440` |  | `}`
| 8370 | `441` |  | `return origLength - length;`
|  | `442` |  | `}`
|  | `443` |  | ``
|  | `444` |  | `/// <summary>`
|  | `445` |  | `/// Sets the dictionary which should be used in the deflate process.`
|  | `446` |  | `/// This call is equivalent to <code>setDictionary(dict, 0, dict.Length)</code>.`
|  | `447` |  | `/// </summary>`
|  | `448` |  | `/// <param name="dictionary">`
|  | `449` |  | `/// the dictionary.`
|  | `450` |  | `/// </param>`
|  | `451` |  | `/// <exception cref="System.InvalidOperationException">`
|  | `452` |  | `/// if SetInput () or Deflate () were already called or another dictionary was already set.`
|  | `453` |  | `/// </exception>`
|  | `454` |  | `public void SetDictionary(byte[] dictionary)`
|  | `455` |  | `{`
| 0 | `456` |  | `SetDictionary(dictionary, 0, dictionary.Length);`
| 0 | `457` |  | `}`
|  | `458` |  | ``
|  | `459` |  | `/// <summary>`
|  | `460` |  | `/// Sets the dictionary which should be used in the deflate process.`
|  | `461` |  | `/// The dictionary is a byte array containing strings that are`
|  | `462` |  | `/// likely to occur in the data which should be compressed. The`
|  | `463` |  | `/// dictionary is not stored in the compressed output, only a`
|  | `464` |  | `/// checksum. To decompress the output you need to supply the same`
|  | `465` |  | `/// dictionary again.`
|  | `466` |  | `/// </summary>`
|  | `467` |  | `/// <param name="dictionary">`
|  | `468` |  | `/// The dictionary data`
|  | `469` |  | `/// </param>`
|  | `470` |  | `/// <param name="index">`
|  | `471` |  | `/// The index where dictionary information commences.`
|  | `472` |  | `/// </param>`
|  | `473` |  | `/// <param name="count">`
|  | `474` |  | `/// The number of bytes in the dictionary.`
|  | `475` |  | `/// </param>`
|  | `476` |  | `/// <exception cref="System.InvalidOperationException">`
|  | `477` |  | `/// If SetInput () or Deflate() were already called or another dictionary was already set.`
|  | `478` |  | `/// </exception>`
|  | `479` |  | `public void SetDictionary(byte[] dictionary, int index, int count)`
|  | `480` |  | `{`
| 0 | `481` |  | `if (state != INIT_STATE) {`
| 0 | `482` |  | `throw new InvalidOperationException();`
|  | `483` |  | `}`
|  | `484` |  | ``
| 0 | `485` |  | `state = SETDICT_STATE;`
| 0 | `486` |  | `engine.SetDictionary(dictionary, index, count);`
| 0 | `487` |  | `}`
|  | `488` |  | ``
|  | `489` |  | `#region Instance Fields`
|  | `490` |  | `/// <summary>`
|  | `491` |  | `/// Compression level.`
|  | `492` |  | `/// </summary>`
|  | `493` |  | `int level;`
|  | `494` |  | ``
|  | `495` |  | `/// <summary>`
|  | `496` |  | `/// If true no Zlib/RFC1950 headers or footers are generated`
|  | `497` |  | `/// </summary>`
|  | `498` |  | `bool noZlibHeaderOrFooter;`
|  | `499` |  | ``
|  | `500` |  | `/// <summary>`
|  | `501` |  | `/// The current state.`
|  | `502` |  | `/// </summary>`
|  | `503` |  | `int state;`
|  | `504` |  | ``
|  | `505` |  | `/// <summary>`
|  | `506` |  | `/// The total bytes of output written.`
|  | `507` |  | `/// </summary>`
|  | `508` |  | `long totalOut;`
|  | `509` |  | ``
|  | `510` |  | `/// <summary>`
|  | `511` |  | `/// The pending output.`
|  | `512` |  | `/// </summary>`
|  | `513` |  | `DeflaterPending pending;`
|  | `514` |  | ``
|  | `515` |  | `/// <summary>`
|  | `516` |  | `/// The deflater engine.`
|  | `517` |  | `/// </summary>`
|  | `518` |  | `DeflaterEngine engine;`
|  | `519` |  | `#endregion`
|  | `520` |  | `}`
|  | `521` |  | `}`