Class BitInputStream

java.lang.Object
java.io.InputStream
jp.gr.java_conf.dangan.io.BitInputStream
All Implemented Interfaces:
Closeable, AutoCloseable

public class BitInputStream extends InputStream
?r?b?g???????????????[?e?B???e?B?N???X?B
 -- revision history --
 $Log: BitInputStream.java,v $
 Revision 1.5  2002/12/07 00:00:00  dangan
 [maintenance]
     ?\?[?X????

 Revision 1.4  2002/11/15 00:00:00  dangan
 [improvement]
     prefetchBits() ??  32bit ???????????????????????????C??
 [change]
     ???\?b?h???????X
     prefetchBit     -> peekBit
     prefetchBoolean -> peekBoolean
     prefetchBits    -> peekBits

 Revision 1.3  2002/11/02 00:00:00  dangan
 [bug fix]
     available() availableBits() ??
     ?u???b?N??????????????????????????????l????????????B

 Revision 1.2  2002/09/05 00:00:00  dangan
 [change]
     EndOfStream ???B???????? read( new byte[0] ) ?? 
     read( byte[] buf, int off, 0 ) ???????l??
     InputStream ??????? 0 ????????????????

 Revision 1.1  2002/09/04 00:00:00  dangan
 [bug fix]
     skip( len ) ?? skipBits( len ) ?? len ?? 0 ?????????
     ??????????????????????????B

 Revision 1.0  2002/09/03 00:00:00  dangan
 add to version control
 [bug fix]
     mark() ?? ???}?????? in ???n?? readLimit ???v?Z???????????????A
     ?v???????? readLimit ???B?????O???}?[?N???u???j???????????????????B
     EndOfStream ???B???????? skip() ?N???? skip( 0 ) ?? -1 ????????????B
 [maintenance]
     ?^?u?p?~
     ???C?Z???X????C??


 
Version:
$Revision: 1.5 $
Author:
$Author: dangan $
  • Constructor Summary

    Constructors
    Constructor
    Description
    ?????X?g???[?? in ???????f?[?^???r?b?g?P???? ?????????????????X?g???[?????\?z?????B
    BitInputStream(InputStream in, int CacheSize)
    ?????X?g???[?? in ???????f?[?^???r?b?g?P???? ?????????????????X?g???[?????\?z?????B
  • Method Summary

    Modifier and Type
    Method
    Description
    int
    ???}???????????X?g???[???????u???b?N??????? ?????????}???????????o?C?g?????????B
    int
    ???}???????????X?g???[???????u???b?N??????? ?????????}???????????r?b?g?????????B
    void
    ?}???????X?g???[????????A ?g?p??????????\?[?X???J???????B
    void
    mark(int readLimit)
    ???}???????????X?g???[???????????u???}?[?N?????????A reset() ???\?b?h???}?[?N???????_?? ???????????u?? ?????????????????B
    boolean
    ???}???????????X?g???[???? mark() ?? reset() ?? ?T?|?[?g?????????????B
    int
    ???????????u?????????? 1?r?b?g???f?[?^?????????????B
    int
    peekBits(int count)
    ???????????u?????????? count ?r?b?g???f?[?^?????????????B
    ?????l?? int?^???????}???????????????????? ?????L???r?b?g???? 32?r?b?g???????B
    EndOfStream ?t??????????A???????o?????}?????????????????? 32?r?b?g???????B(?r?b?g?o?b?t?@?????????? 32?r?b?g??????????)
    ???? 32?r?b?g?????????????@?\???K?{???????????? ?????s?x mark()?AreadBits()?Areset() ???J?????????A ?}???N???X???g?p?????}???????????}???B
    boolean
    ???????????u?????????? 1?r?b?g???f?[?^?? ?^?U?l?????????????????B
    int
    ???}???????X?g???[?????? 8?r?b?g???f?[?^???????????B
    int
    read(byte[] buffer)
    ???}???????????X?g???[?????? ?o?C?g?z?? buffer ?? ?????????????f?[?^???????????B
    ?f?[?^???K?????? buffer ????????????????????}?????????B
    int
    read(byte[] buffer, int index, int length)
    ???}???????????X?g???[?????? ?o?C?g?z?? buffer ?? index ???w???????????u???? length ?o?C?g???f?[?^?? ?????????B
    ?}?????\?b?h?? length?o?C?g???????????A EndOfStream ?????B?????????u???b?N?????B
    ?f?[?^???K?????? length ?o?C?g???????????????????? ????}?????????B
    int
    ???}???????????X?g???[?????? 1?r?b?g???f?[?^?? ?????????B
    int
    readBits(int count)
    ???}???????????X?g???[?????? count ?r?b?g???f?[?^?? ?????????B ?????l?? int?l???????????????????????? ?????????}?????????? ?????L???r?b?g???? 32?r?b?g?? ???????Acount ??32???????l?????????????`?F?b?N?? ??????????? ???????????l???????????????? ?r?b?g ?f?[?^?????????????????B
    ???????? readBits( 33 ) ???????????? ????1?r?b?g?? ?f?[?^???????????A???????? 32?r?b?g???f?[?^???????B
    ???? count ?? 0?????????????????????????o?????????A ?f?[?^??????????????????????????? ?????l?? ????0?A EndOfStream ???B????????? EOFException ?? ???????_???????????}???B
    boolean
    ???}???????????X?g???[?????? 1?r?b?g???f?[?^?? ?^?U?l???????????????B
    void
    ???}???????????X?g???[???????????????u???????? mark() ???\?b?h???????o???????????????u???????????B
    long
    skip(long length)
    ???}???????????X?g???[?????f?[?^?? length ?o?C?g ???????????B
    ?}?????\?b?h?? length?o?C?g?????????????A EndOfStream ?????B?????????u???b?N?????B
    ?f?[?^???K?????? length ?o?C?g?????????????????????? ????}?????????B
    int
    skipBits(int count)
    ???}???????X?g???[?????? count ?r?b?g???f?[?^?? ???????????B

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
  • Constructor Details

    • BitInputStream

      public BitInputStream(InputStream in)
      ?????X?g???[?? in ???????f?[?^???r?b?g?P???? ?????????????????X?g???[?????\?z?????B
      Parameters:
      in - ?????X?g???[??
    • BitInputStream

      public BitInputStream(InputStream in, int CacheSize)
      ?????X?g???[?? in ???????f?[?^???r?b?g?P???? ?????????????????X?g???[?????\?z?????B
      Parameters:
      in - ?????X?g???[??
      CacheSize - ?o?b?t?@?T?C?Y
  • Method Details

    • read

      public int read() throws IOException
      ???}???????X?g???[?????? 8?r?b?g???f?[?^???????????B
      Specified by:
      read in class InputStream
      Returns:
      ?????o?????? 8?r?b?g???f?[?^?B
      ???? EndOfStream ???B????????????? -1
      Throws:
      IOException - ???}???????????X?g???[???? ???o???G???[?????????????
      BitDataBrokenException - EndOfStream???B???????? ?v?????????r?b?g?????f?[?^?? ?????????????s?????????B
    • read

      public int read(byte[] buffer) throws IOException
      ???}???????????X?g???[?????? ?o?C?g?z?? buffer ?? ?????????????f?[?^???????????B
      ?f?[?^???K?????? buffer ????????????????????}?????????B
      Overrides:
      read in class InputStream
      Parameters:
      buffer - ?????????????f?[?^???i?[???????????o?C?g?z??
      Returns:
      buffer ?????????????f?[?^?????o?C?g?????????B
      ???? EndOfStream ???B????????????? -1 ???????B
      Throws:
      IOException - ???}???????????X?g???[???? ???o???G???[?????????????
      BitDataBrokenException - EndOfStream???B???????? ?v?????????r?b?g?????f?[?^?? ?????????????s?????????B
    • read

      public int read(byte[] buffer, int index, int length) throws IOException
      ???}???????????X?g???[?????? ?o?C?g?z?? buffer ?? index ???w???????????u???? length ?o?C?g???f?[?^?? ?????????B
      ?}?????\?b?h?? length?o?C?g???????????A EndOfStream ?????B?????????u???b?N?????B
      ?f?[?^???K?????? length ?o?C?g???????????????????? ????}?????????B
      Overrides:
      read in class InputStream
      Parameters:
      buffer - ?????????????f?[?^???i?[???????????o?C?g?z??
      index - buffer?????f?[?^?????????J?n???u
      length - buffer???????????f?[?^??
      Returns:
      buffer ?????????????f?[?^?????o?C?g?????????B
      ???? EndOfStream ???B????????????? -1 ???????B
      Throws:
      IOException - ???}???????????X?g???[???? ???o???G???[?????????????
      BitDataBrokenException - EndOfStream???B???????? ?v?????????r?b?g?????f?[?^?? ?????????????s?????????B
    • skip

      public long skip(long length) throws IOException
      ???}???????????X?g???[?????f?[?^?? length ?o?C?g ???????????B
      ?}?????\?b?h?? length?o?C?g?????????????A EndOfStream ?????B?????????u???b?N?????B
      ?f?[?^???K?????? length ?o?C?g?????????????????????? ????}?????????B
      Overrides:
      skip in class InputStream
      Parameters:
      length - ???????????o?C?g???B
      Returns:
      ?????????????????????o?C?g???B
      Throws:
      IOException - ???}???????????X?g???[???? ???o???G???[?????????????
    • mark

      public void mark(int readLimit)
      ???}???????????X?g???[???????????u???}?[?N?????????A reset() ???\?b?h???}?[?N???????_?? ???????????u?? ?????????????????B
      Overrides:
      mark in class InputStream
      Parameters:
      readLimit - ?}?[?N???u???????????E???o?C?g???B ?}???o?C?g?????L?????f?[?^?????? ?????????? reset()?????????????? ?\?????????B
    • reset

      public void reset() throws IOException
      ???}???????????X?g???[???????????????u???????? mark() ???\?b?h???????o???????????????u???????????B
      Overrides:
      reset in class InputStream
      Throws:
      IOException -
      (1) BitInputStream ?? mark ???????????????????B
      (2) ???}???????????X?g???[???? markSupported()?? false ???????????B
      (3) ???}???????????X?g???[???? ???o???G???[??????????????B
      ?????????B
    • markSupported

      public boolean markSupported()
      ???}???????????X?g???[???? mark() ?? reset() ?? ?T?|?[?g?????????????B
      Overrides:
      markSupported in class InputStream
      Returns:
      ?X?g???[???? mark() ?? reset() ?? ?T?|?[?g?????????? true?B
      ?T?|?[?g??????????? false?B
    • available

      public int available() throws IOException
      ???}???????????X?g???[???????u???b?N??????? ?????????}???????????o?C?g?????????B
      Overrides:
      available in class InputStream
      Returns:
      ?u???b?N????????????o?????o?C?g???B
      Throws:
      IOException - ???}???????????X?g???[???? ???o???G???[?????????????
    • close

      public void close() throws IOException
      ?}???????X?g???[????????A ?g?p??????????\?[?X???J???????B
      Specified by:
      close in interface AutoCloseable
      Specified by:
      close in interface Closeable
      Overrides:
      close in class InputStream
      Throws:
      IOException - ???}???????????X?g???[???? ???o???G???[?????????????
    • readBit

      public int readBit() throws IOException
      ???}???????????X?g???[?????? 1?r?b?g???f?[?^?? ?????????B
      Returns:
      ????????????1?r?b?g???f?[?^?B
      ????EndOfStream???B????????????? -1?B
      Throws:
      IOException - ???}???????????X?g???[???? ???o???G???[?????????????
    • readBoolean

      public boolean readBoolean() throws IOException
      ???}???????????X?g???[?????? 1?r?b?g???f?[?^?? ?^?U?l???????????????B
      Returns:
      ????????????1?r?b?g???f?[?^?? 1???????? true?A0???????? false ???????B
      Throws:
      EOFException - ????EndOfStream???B???????????
      IOException - ???}???????????X?g???[???? ???o???G???[?????????????
    • readBits

      public int readBits(int count) throws IOException
      ???}???????????X?g???[?????? count ?r?b?g???f?[?^?? ?????????B ?????l?? int?l???????????????????????? ?????????}?????????? ?????L???r?b?g???? 32?r?b?g?? ???????Acount ??32???????l?????????????`?F?b?N?? ??????????? ???????????l???????????????? ?r?b?g ?f?[?^?????????????????B
      ???????? readBits( 33 ) ???????????? ????1?r?b?g?? ?f?[?^???????????A???????? 32?r?b?g???f?[?^???????B
      ???? count ?? 0?????????????????????????o?????????A ?f?[?^??????????????????????????? ?????l?? ????0?A EndOfStream ???B????????? EOFException ?? ???????_???????????}???B
      Parameters:
      count - ?????????f?[?^???r?b?g??
      Returns:
      ?????????????r?b?g?f?[?^?B
      Throws:
      IOException - ???}???????????X?g???[???? ???o???G???[?????????????
      EOFException - ????EndOfStream???B???????????
      BitDataBrokenException - ?????????r???? EndOfStream???B???????? ?v?????????r?b?g?????f?[?^?????????? ?????s?????????B
    • skipBits

      public int skipBits(int count) throws IOException
      ???}???????X?g???[?????? count ?r?b?g???f?[?^?? ???????????B
      Parameters:
      count - ??????????????????r?b?g??
      Returns:
      ???????????????????r?b?g??
      Throws:
      IOException - ???}???????????X?g???[???? ???o???G???[?????????????
    • peekBit

      public int peekBit() throws IOException
      ???????????u?????????? 1?r?b?g???f?[?^?????????????B
      Returns:
      ????????????1?r?b?g???f?[?^?B
      ????EndOfStream???B????????????? -1?B
      Throws:
      IOException - ???}???????????X?g???[???? ???o???G???[?????????????
    • peekBoolean

      public boolean peekBoolean() throws IOException
      ???????????u?????????? 1?r?b?g???f?[?^?? ?^?U?l?????????????????B
      Returns:
      ????????????1?r?b?g???f?[?^?? 1???????? true?A0???????? false ???????B
      Throws:
      EOFException - ????EndOfStream???B???????????
      IOException - ???}???????????X?g???[???? ???o???G???[?????????????
    • peekBits

      public int peekBits(int count) throws IOException
      ???????????u?????????? count ?r?b?g???f?[?^?????????????B
      ?????l?? int?^???????}???????????????????? ?????L???r?b?g???? 32?r?b?g???????B
      EndOfStream ?t??????????A???????o?????}?????????????????? 32?r?b?g???????B(?r?b?g?o?b?t?@?????????? 32?r?b?g??????????)
      ???? 32?r?b?g?????????????@?\???K?{???????????? ?????s?x mark()?AreadBits()?Areset() ???J?????????A ?}???N???X???g?p?????}???????????}???B
      Parameters:
      count - ?????????r?b?g??
      Returns:
      ?????????? count ?r?b?g???r?b?g?f?[?^
      Throws:
      EOFException - ????EndOfStream???B???????????
      IOException - ???}???????????X?g???[???? ???o???G???[?????????????
      NotEnoughBitsException - count ???????????\???????O??????
    • availableBits

      public int availableBits() throws IOException
      ???}???????????X?g???[???????u???b?N??????? ?????????}???????????r?b?g?????????B
      Returns:
      ?u???b?N????????????o?????r?b?g???B
      Throws:
      IOException - ???}???????????X?g???[???? ???o???G???[?????????????