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-=begin
-#
-# zlib.rd.src
-#
-# Copyright (C) UENO Katsuhiro 2000-2003
-#
-# $Id: zlib.rd,v 1.1.2.1 2004/03/28 14:10:39 akr Exp $
-#
-
-= Ruby/zlib version 0.6.0
-
-Ruby/zlib is an extension library to use zlib from Ruby.
-Ruby/zlib also provides the features for accessing gzipped files.
-
-You can modify or redistribute Ruby/zlib in the same manner of
-Ruby interpreter. The latest version of Ruby/zlib would be found
-at ((<URL:http://www.blue.sky.or.jp/>)).
-
-Any comments and suggestions are always welcome. Please send
-them to ruby-list ML, ruby-ext ML, ruby-talk ML, or the author's
-mail address ((<URL:mailto:katsu@blue.sky.or.jp>)).
-
-This document is experimental and broken English version.
-If you find some mistakes or strange expressions (including
-kidding or unnatural ones) in this document, please let me know
-for my study.
-
-* ((<Zlib>))
-
- * ((<Zlib::Error>))
- * ((<Zlib::ZStream>))
- * ((<Zlib::Deflate>))
- * ((<Zlib::Inflate>))
- * ((<Zlib::GzipFile>))
- * ((<Zlib::GzipFile::Error>))
- * ((<Zlib::GzipWriter>))
- * ((<Zlib::GzipReader>))
-
-* ((<Changes from 0.5 to 0.6>))
-* ((<Changes from 0.4 to 0.5>))
-
-== Zlib
-
-Zlib is the module which provides the other features in zlib C
-library. See zlib.h for detail of each module function.
-
-=== Module Functions:
-
---- Zlib.zlib_version
-
- Returns the string which represents the version of zlib
- library.
-
---- Zlib.adler32([string[, adler]])
-
- Calculates Alder-32 checksum for ((|string|)),
- and returns updated value of ((|alder|)).
- If ((|string|)) is omitted, it returns the Adler-32 initial
- value. If ((|alder|)) is omitted, it assumes that the initial
- value is given to ((|alder|)).
-
---- Zlib.crc32([string[, crc]])
-
- Calculates CRC checksum for ((|string|)), and returns
- updated value of ((|crc|)). If ((|string|)) is omitted,
- it returns the CRC initial value. ((|crc|)) is omitted,
- it assumes that the initial value is given to ((|crc|)).
-
---- Zlib.crc_table
-
- Returns the table for calculating CRC checksum as an array.
-
-=== Constants:
-
---- Zlib::VERSION
-
- The Ruby/zlib version string.
-
---- Zlib::ZLIB_VERSION
-
- The string which represents the version of zlib.h.
-
---- Zlib::BINARY
---- Zlib::ASCII
---- Zlib::UNKNOWN
-
- The integers representing data types which
- ((<Zlib::ZStream#data_type>)) method returns.
-
---- Zlib::NO_COMPRESSION
---- Zlib::BEST_SPEED
---- Zlib::BEST_COMPRESSION
---- Zlib::DEFAULT_COMPRESSION
-
- The integers representing compression levels which are
- an argument for ((<Zlib::Deflate.new>)),
- ((<Zlib::Deflate#deflate>)), and so on.
-
---- Zlib::FILTERED
---- Zlib::HUFFMAN_ONLY
---- Zlib::DEFAULT_STRATEGY
-
- The integers representing compression methods which are
- an argument for ((<Zlib::Deflate.new>)) and
- ((<Zlib::Deflate#params>)).
-
---- Zlib::DEF_MEM_LEVEL
---- Zlib::MAX_MEM_LEVEL
-
- The integers representing memory levels which are an
- argument for ((<Zlib::Deflate.new>)),
- ((<Zlib::Deflate#params>)), and so on.
-
---- Zlib::MAX_WBITS
-
- The default value of ((|windowBits|)) which is an argument for
- ((<Zlib::Deflate.new>)) and ((<Zlib::Inflate.new>)).
-
---- Zlib::NO_FLUSH
---- Zlib::SYNC_FLUSH
---- Zlib::FULL_FLUSH
---- Zlib::FINISH
-
- The integers to control the output of the deflate stream,
- which are an argument for ((<Zlib::Deflate#deflate>)) and so on.
-
---- Zlib::OS_CODE
---- Zlib::OS_MSDOS
---- Zlib::OS_AMIGA
---- Zlib::OS_VMS
---- Zlib::OS_UNIX
---- Zlib::OS_VMCMS
---- Zlib::OS_ATARI
---- Zlib::OS_OS2
---- Zlib::OS_MACOS
---- Zlib::OS_ZSYSTEM
---- Zlib::OS_CPM
---- Zlib::OS_TOPS20
---- Zlib::OS_WIN32
---- Zlib::OS_QDOS
---- Zlib::OS_RISCOS
---- Zlib::OS_UNKNOWN
-
- The return values of ((<Zlib::GzipFile#os_code>)) method.
-
-
-== Zlib::Error
-
-The superclass for all exceptions raised by Ruby/zlib.
-
-The following exceptions are defined as subclasses of Zlib::Error.
-These exceptions are raised when zlib library functions return
-with an error status.
-
- * Zlib::StreamEnd
- * Zlib::NeedDict
- * Zlib::DataError
- * Zlib::StreamError
- * Zlib::MemError
- * Zlib::BufError
- * Zlib::VersionError
-
-=== SuperClass:
-
-* StandardError
-
-
-== Zlib::ZStream
-
-The abstract class for the stream which handles the compressed
-data. The operations are defined in the subclasses,
-((<Zlib::Deflate>)) for compression, and ((<Zlib::Inflate>))
-for decompression.
-
-An instance of Zlib::ZStream has one stream (struct zstream) and
-two variable-length buffers which associated to the input
-(next_in) of the stream and the output (next_out) of the stream.
-In this document, "input buffer" means the buffer for input, and
-"output buffer" means the buffer for output.
-
-Data inputed into an instance of Zlib::ZStream are temporally
-stored into the end of input buffer, and then data in input buffer
-are processed from the beginning of the buffer until no more
-output from the stream is produced (i.e. until avail_out > 0
-after processing). During processing, output buffer is allocated
-and expanded automatically to hold all output data.
-
-Some particular instance methods consume the data in output buffer
-and return them as a String.
-
-Here is an ascii art for describing above:
-
- +================ an instance of Zlib::ZStream ================+
- || ||
- || +--------+ +-------+ +--------+ ||
- || +--| output |<---------|zstream|<---------| input |<--+ ||
- || | | buffer | next_out+-------+next_in | buffer | | ||
- || | +--------+ +--------+ | ||
- || | | ||
- +===|======================================================|===+
- | |
- v |
- "output data" "input data"
-
-If an error is occurred during processing input buffer,
-an exception which is a subclass of ((<Zlib::Error>)) is raised.
-At that time, both input and output buffer keeps their conditions
-at the time when the error is occurred.
-
-=== SuperClass:
-
-* Object
-
-=== Class Methods:
-
---- Zlib::ZStream.new
-
- See ((<Zlib::Deflate.new>)) and ((<Zlib::Inflate.new>)).
-
-=== Methods:
-
---- Zlib::ZStream#avail_in
-
- Returns bytes of data in input buffer.
- Normally, returns 0.
-
---- Zlib::ZStream#avail_out
-
- Returns bytes of free spaces in output buffer.
- Because the free spaces are allocated automatically,
- this method returns 0 normally.
-
---- Zlib::ZStream#avail_out = size
-
- Allocates free spaces of ((|size|)) bytes in output buffer.
- If there are more than ((|size|)) bytes spaces in the buffer,
- the buffer is truncated.
- Because the free spaces are allocated automatically,
- you usually need not to use this method.
-
---- Zlib::ZStream#flush_next_in
-
- Flushes input buffer and returns all data in that buffer.
-
---- Zlib::ZStream#flush_next_out
-
- Flushes output buffer and returns all data in that buffer.
-
---- Zlib::ZStream#total_in
-
- Returns the total bytes of the input data to the stream.
-
---- Zlib::ZStream#total_out
-
- Returns the total bytes of the output data from the stream.
-
---- Zlib::ZStream#data_type
-
- Guesses the type of the data which have been inputed into
- the stream. The returned value is either ((<Zlib::BINARY>)),
- ((<Zlib::ASCII>)), or ((<Zlib::UNKNOWN>)).
-
---- Zlib::ZStream#adler
-
- Returns the alder-32 checksum.
-
---- Zlib::ZStream#reset
-
- Resets and initializes the stream. All data in both
- input and output buffer are discarded.
-
---- Zlib::ZStream#finish
-
- Finishes the stream and flushes output buffer.
- See ((<Zlib::Deflate#finish>)) and ((<Zlib::Inflate#finish>))
- for detail of the behavior.
-
---- Zlib::ZStream#finished?
---- Zlib::ZStream#stream_end?
-
- Returns true if the stream is finished.
-
---- Zlib::ZStream#close
---- Zlib::ZStream#end
-
- Closes the stream. All operations on the closed stream
- will raise an exception.
-
---- Zlib::ZStream#closed?
---- Zlib::ZStream#ended?
-
- Returns true if the stream closed.
-
-
-== Zlib::Deflate
-
-The class for compressing string data.
-
-=== SuperClass:
-
-* ((<Zlib::ZStream>))
-
-=== Class Methods:
-
---- Zlib::Deflate.deflate(string[, level])
-
- Compresses ((|string|)). The avail values of ((|level|)) are
- ((<Zlib::NO_COMPRESSION>)), ((<Zlib::BEST_SPEED>)),
- ((<Zlib::BEST_COMPRESSION>)), ((<Zlib::DEFAULT_COMPRESSION>)),
- and the integer from 0 to 9.
-
- This method is almost equivalent to the following code:
-
- def deflate(string, level)
- z = Zlib::Deflate.new(level)
- dst = z.deflate(string, Zlib::FINISH)
- z.close
- dst
- end
-
---- Zlib::Deflate.new([level[, windowBits[, memlevel[, strategy]]]])
-
- Creates a new deflate stream for compression.
- See zlib.h for details of each argument.
- If an argument is nil, the default value of that
- argument is used.
-
-=== Methods:
-
---- Zlib::Deflate#clone
-
- Duplicates the deflate stream.
-
---- Zlib::Deflate#deflate(string[, flush])
-
- Inputs ((|string|)) into the deflate stream and returns
- the output from the stream. Calling this method,
- both input and output buffer of the stream are flushed.
- If ((|string|)) is nil, this method finishes the stream,
- just like ((<Zlib::ZStream#finish>)).
- The value of ((|flush|)) should be either ((<Zlib::NO_FLUSH>)),
- ((<Zlib::SYNC_FLUSH>)), ((<Zlib::FULL_FLUSH>)), or
- ((<Zlib::FINISH>)).
- See zlib.h for details.
-
---- Zlib::Deflate#<< string
-
- Inputs ((|string|)) into the deflate stream just like
- ((<Zlib::Deflate#deflate>)), but returns Zlib::Deflate object
- itself. The output from the stream is preserved in output
- buffer.
-
---- Zlib::Deflate#flush([flush])
-
- This method is equivalent to (({deflate('', ((|flush|)))})).
- If ((|flush|)) is omitted, ((<Zlib::SYNC_FLUSH>)) is used
- as ((|flush|)). This method is just provided for
- readability of your Ruby script.
-
---- Zlib::Deflate#finish
-
- Finishes the stream. This method is equivalent to
- (({deflate('', Zlib::FINISH)})).
-
---- Zlib::Deflate#params(level, strategy)
-
- Changes the parameters of the deflate stream.
- See zlib.h for details. The output from the stream
- by changing the params is preserved in output buffer.
-
---- Zlib::Deflate#set_dictionary(string)
-
- Sets the preset dictionary and returns ((|string|)).
- This method is available just only after
- ((<Zlib::Deflate.new>)) or ((<Zlib::ZStream#reset>)) method
- was called. See zlib.h for details.
-
-
-== Zlib::Inflate
-
-The class for decompressing compressed data.
-Unlike ((<Zlib::Deflate>)), an instance of this class is not able
-to duplicate (clone, dup) itself.
-
-=== SuperClass:
-
-* ((<Zlib::ZStream>))
-
-=== Class Methods:
-
---- Zlib::Inflate.inflate(string)
-
- Decompresses ((|string|)). Raises a ((<Zlib::NeedDict>))
- exception if a preset dictionary is needed for decompression.
-
- This method is almost equivalent to the following code:
-
- def inflate(string)
- zstream = Zlib::Inflate.new
- buf = zstream.inflate(string)
- zstream.finish
- zstream.close
- buf
- end
-
---- Zlib::Inflate.new([windowBits])
-
- Creates a new inflate stream for decompression.
- See zlib.h for details of the argument.
- If ((|windowBits|)) is nil, the default value is used.
-
-=== Methods:
-
---- Zlib::Inflate#inflate(string)
-
- Inputs ((|string|)) into the inflate stream and returns
- the output from the stream. Calling this method,
- both input and output buffer of the stream are flushed.
- If ((|string|)) is nil, this method finishes the stream,
- just like ((<Zlib::ZStream#finish>)).
-
- Raises a ((<Zlib::NeedDict>)) exception if a preset
- dictionary is needed to decompress. Set the dictionary
- by ((<Zlib::Inflate#set_dictionary>)) and then call
- this method again with an empty string.
-
---- Zlib::Inflate#<< string
-
- Inputs ((|string|)) into the inflate stream just like
- ((<Zlib::Inflate#inflate>)), but returns Zlib::Inflate object
- itself. The output from the stream is preserved in output
- buffer.
-
---- Zlib::Inflate#finish
-
- Finishes the inflate stream and returns the garbage
- following the compressed data. Raises an exception
- if the stream is not finished
- (i.e. ((<Zlib::ZStream#finished?>)) doesn't returns true).
-
- The inflate stream finishes itself as soon as it meets
- the end code of the compressed data, you need not to call
- this method explicitly. However, this method is useful
- for checking whether the data is correctly ended or not.
-
---- Zlib::Inflate#set_dictionary(string)
-
- Sets the preset dictionary and returns ((|string|))
- This method is available just only after a ((<Zlib::NeedDict>))
- exception was raised. See zlib.h for details.
-
---- Zlib::Inflate#sync(string)
-
- Inputs ((|string|)) into the end of input buffer and
- skips data until a full flush point can be found.
- If the point is found in the buffer, this method flushes
- the buffer and returns false. Otherwise it returns true
- and the following data of full flush point is preserved
- in the buffer.
-
---- Zlib::Inflate#sync_point?
-
- What is this?
-
-
-== Zlib::GzipFile
-
-The abstract class for handling a gzip formatted compressed file.
-The operations are defined in the subclasses,
-((<Zlib::GzipReader>)) for reading, and ((<Zlib::GzipWriter>))
-for writing.
-
-GzipReader should be used with associating an instance of IO class
-(or an object which has the same methods as IO has).
-
-=== SuperClass:
-
-* Object
-
-=== Class Methods:
-
---- Zlib::GzipFile.new(args...)
-
- See ((<Zlib::GzipReader.new>)) and ((<Zlib::GzipWriter.new>)).
-
---- Zlib::GzipFile.wrap(args...) {|gz| ... }
-
- See ((<Zlib::GzipReader.wrap>)) and ((<Zlib::GzipWriter.wrap>)).
-
---- Zlib::GzipFile.open(args...) {|gz| ... }
-
- See ((<Zlib::GzipReader.open>)) and ((<Zlib::GzipWriter.open>)).
-
-=== Methods:
-
---- Zlib::GzipFile#closed?
---- Zlib::GzipFile#to_io
-
- Same as IO.
-
---- Zlib::GzipFile#close
-
- Closes the GzipFile object. This method calls close method
- of the associated IO object. Returns the associated IO object.
-
---- Zlib::GzipFile#finish
-
- Closes the GzipFile object. Unlike ((<Zlib::GzipFile#close>)),
- this method ((*never*)) calls close method of the associated IO
- object. Returns the associated IO object.
-
---- Zlib::GzipFile#crc
-
- Returns CRC value of the uncompressed data.
-
---- Zlib::GzipFile#level
-
- Returns compression level.
-
---- Zlib::GzipFile#mtime
-
- Returns last modification time recorded in the gzip
- file header.
-
---- Zlib::GzipFile#os_code
-
- Returns OS code number recorded in the gzip file header.
-
---- Zlib::GzipFile#orig_name
-
- Returns original filename recorded in the gzip file header,
- or nil if original filename is not present.
-
---- Zlib::GzipFile#comment
-
- Returns comments recorded in the gzip file header, or
- nil if the comments is not present.
-
---- Zlib::GzipFile#sync
---- Zlib::GzipFile#sync= flag
-
- Same as IO. If ((|flag|)) is true, the associated IO object
- must respond to flush method. While `sync' mode is true,
- the compression ratio decreases sharply.
-
-
-== Zlib::GzipFile::Error
-
-The superclass for all exceptions raised during processing a gzip
-file.
-
-The following exceptions are defined as subclasses of
-Zlib::GzipFile::Error.
-
-: Zlib::GzipFile::NoFooter
-
- Raised when gzip file footer has not found.
-
-: Zlib::GzipFile::CRCError
-
- Raised when the CRC checksum recorded in gzip file footer
- is not equivalent to CRC checksum of the actually
- uncompressed data.
-
-: Zlib::GzipFile::LengthError
-
- Raised when the data length recorded in gzip file footer
- is not equivalent to length of the actually uncompressed data.
-
-=== SuperClass:
-
-* ((<Zlib::Error>))
-
-
-== Zlib::GzipReader
-
-The class for reading a gzipped file. GzipReader should be used
-with associating an instance of IO class (or an object which has
-the same methods as IO has).
-
- Zlib::GzipReader.open('hoge.gz') {|gz|
- print gz.read
- }
-
- f = File.open('hoge.gz')
- gz = Zlib::GzipReader.new(f)
- print gz.read
- gz.close
-
-=== SuperClass:
-
-* ((<Zlib::GzipFile>))
-
-=== Included Modules:
-
-* Enumerable
-
-=== Class Methods:
-
---- Zlib::GzipReader.new(io)
-
- Creates a GzipReader object associated with ((|io|)).
- The GzipReader object reads gzipped data from ((|io|)),
- and parses/decompresses them. At least, ((|io|)) must have
- read method that behaves same as read method in IO class.
-
- If the gzip file header is incorrect, raises an
- ((<Zlib::GzipFile::Error>)) exception.
-
---- Zlib::GzipReader.wrap(io) {|gz| ... }
-
- Creates a GzipReader object associated with ((|io|)), and
- executes the block with the newly created GzipReader object,
- just like File::open. The GzipReader object will be closed
- automatically after executing the block. If you want to keep
- the associated IO object opening, you may call
- ((<Zlib::GzipFile#finish>)) method in the block.
-
---- Zlib::GzipReader.open(filename)
---- Zlib::GzipReader.open(filename) {|gz| ... }
-
- Opens a file specified by ((|filename|)) as a gzipped file,
- and returns a GzipReader object associated with that file.
- Further details of this method are same as
- ((<Zlib::GzipReader.new>)) and ((<ZLib::GzipReader.wrap>)).
-
-=== ¥á¥½¥Ã¥É:
-
---- Zlib::GzipReader#eof
---- Zlib::GzipReader#eof?
-
- Returns true if the object reaches the end of compressed data.
- Note that eof? does ((*not*)) return true when reaches the
- end of ((*file*)).
-
---- Zlib::GzipReader#pos
---- Zlib::GzipReader#tell
-
- Returns the total bytes of data decompressed until now.
- Not that it does ((*not*)) the position of file pointer.
-
---- Zlib::GzipReader#each([rs])
---- Zlib::GzipReader#each_line([rs])
---- Zlib::GzipReader#each_byte([rs])
---- Zlib::GzipReader#gets([rs])
---- Zlib::GzipReader#getc
---- Zlib::GzipReader#lineno
---- Zlib::GzipReader#lineno=
---- Zlib::GzipReader#read([length])
---- Zlib::GzipReader#readchar
---- Zlib::GzipReader#readline([rs])
---- Zlib::GzipReader#readlines([rs])
---- Zlib::GzipReader#ungetc(char)
-
- Same as IO, but raises ((<Zlib::Error>)) or
- ((<Zlib::GzipFile::Error>)) exception if an error was found
- in the gzip file.
-
- Be careful of the footer of gzip file. A gzip file has
- the checksum of pre-compressed data in its footer.
- GzipReader checks all uncompressed data against that checksum
- at the following cases, and if failed, raises
- ((<Zlib::GzipFile::NoFooter>)), ((<Zlib::GzipFile::CRCError>)),
- or ((<Zlib::GzipFile::LengthError>)) exception.
-
- * When an reading request is received beyond the end of file
- (the end of compressed data).
- That is, when ((<Zlib::GzipReader#read>)),
- ((<Zlib::GzipReader#gets>)), or some other methods for reading
- returns nil.
-
- * When ((<Zlib::GzipFile#close>)) method is called after
- the object reaches the end of file.
-
- * When ((<Zlib::GzipReader#unused>)) method is called after
- the object reaches the end of file.
-
---- Zlib::GzipReader#rewind
-
- Resets the position of the file pointer to the point
- created the GzipReader object.
- The associated IO object need to respond to seek method.
-
---- Zlib::GzipReader#unused
-
- Returns the rest of the data which had read for parsing gzip
- format, or nil if the whole gzip file is not parsed yet.
-
-
-== Zlib::GzipWriter
-
-The class for writing a gzipped file. GzipWriter should be used
-with associate with an instance of IO class (or an object which
-has the same methods as IO has).
-
- Zlib::GzipWriter.open('hoge.gz') {|gz|
- gz.write 'jugemu jugemu gokou no surikire...'
- }
-
- f = File.open('hoge.gz', 'w')
- gz = Zlib::GzipWriter.new(f)
- gz.write 'jugemu jugemu gokou no surikire...'
- gz.close
-
-NOTE: Due to the limitation in finalizer of Ruby, you must close
-explicitly GzipWriter object by ((<Zlib::GzipWriter#close>)) etc.
-Otherwise, GzipWriter should be not able to write gzip footer and
-generate broken gzip file.
-
-=== SuperClass:
-
-* ((<Zlib::GzipFile>))
-
-=== Class Methods:
-
---- Zlib::GzipWriter.new(io[, level[, strategy]])
-
- Creates a GzipWriter object associated with ((|io|)).
- ((|level|)) and ((|strategy|)) should be same as the
- arguments of ((<Zlib::Deflate.new>)). The GzipWriter object
- writes gzipped data to ((|io|)). At least, ((|io|)) must
- respond to write method that behaves same as write method
- in IO class.
-
---- Zlib::GzipWriter.wrap(io[, level[, strategy]]) {|gz| ... }
-
- Creates a GzipWriter object associated with ((|io|)), and
- executes the block with the newly created GzipWriter object,
- just like File::open. The GzipWriter object will be closed
- automatically after executing the block. If you want to keep
- the associated IO object opening, you may call
- ((<Zlib::GzipFile#finish>)) method in the block.
-
---- Zlib::GzipWriter.open(filename[, level[, strategy]])
---- Zlib::GzipWriter.open(filename[, level[, strategy]]) {|gz| ... }
-
- Opens a file specified by ((|filename|)) for writing
- gzip compressed data, and returns a GzipWriter object
- associated with that file. Further details of this method
- are same as ((<Zlib::GzipWriter.new>)) and
- ((<Zlib::GzipWriter#wrap>)).
-
-
-=== Methods:
-
---- Zlib::GzipWriter#close
---- Zlib::GzipWriter#finish
-
- Closes the GzipFile object. This method calls close method
- of the associated IO object. Returns the associated IO object.
- See ((<Zlib::GzipFile#close>)) and ((<Zlib::GzipFile#finish>))
- for the difference between close and finish.
-
- ((*NOTE: Due to the limitation in finalizer of Ruby, you must
- close GzipWriter object explicitly. Otherwise, GzipWriter
- should be not able to write gzip footer and generate broken
- gzip file.*))
-
---- Zlib::GzipWriter#pos
---- Zlib::GzipWriter#tell
-
- Returns the total bytes of data compressed until now.
- Note that it does ((*not*)) the position of file pointer.
-
---- Zlib::GzipWriter#<< str
---- Zlib::GzipWriter#putc(ch)
---- Zlib::GzipWriter#puts(obj...)
---- Zlib::GzipWriter#print(arg...)
---- Zlib::GzipWriter#printf(format, arg...)
---- Zlib::GzipWriter#write(str)
-
- Same as IO.
-
---- Zlib::GzipWriter#flush([flush])
-
- Flushes all the internal buffers of the GzipWriter object.
- The meaning of ((|flush|)) is same as one of the argument of
- ((<Zlib::Deflate#deflate>)).
- ((<Zlib::SYNC_FLUSH>)) is used if ((|flush|)) is omitted.
- It is no use giving ((|flush|)) ((<Zlib::NO_FLUSH>)).
-
---- Zlib::GzipWriter#mtime= time
-
- Sets last modification time to be stored in the gzip file
- header. ((<Zlib::GzipFile::Error>)) exception will be raised
- if this method is called after writing method (like
- ((<Zlib::GzipWriter#write>))) was called.
-
---- Zlib::GzipWriter#orig_name= filename
-
- Sets original filename to be stored in the gzip file header.
- ((<Zlib::GzipFile::Error>)) exception will be raised
- if this method is called after writing method (like
- ((<Zlib::GzipWriter#write>))) was called.
-
---- Zlib::GzipWriter#comment= string
-
- Sets comments to be stored in the gzip file header.
- ((<Zlib::GzipFile::Error>)) exception will be raised
- if this method is called after writing method (like
- ((<Zlib::GzipWriter#write>))) was called.
-
-
-== Changes from 0.5 to 0.6
-
-* New methods:
-
- * ((<Zlib::GzipFile.wrap>))
- * ((<Zlib::GzipFile#finish>))
-
-* New constants:
-
- * ((<Zlib::ZLIB_VERSION>))
- * ((<Zlib::OS_VMCMS>))
- * ((<Zlib::OS_ZSYSTEM>))
- * ((<Zlib::OS_CPM>))
- * ((<Zlib::OS_QDOS>))
- * ((<Zlib::OS_RISCOS>))
- * ((<Zlib::OS_UNKNOWN>))
-
-* Changed methods:
-
- * ((<Zlib::GzipFile.new>)) now takes no block. Use
- ((<Zlib::GzipFile.wrap>)) instead.
-
- * ((<Zlib::GzipFile#close>)) now takes no argument. Use
- ((<Zlib::GzipFile#finish>)) instead.
-
-* Renamed methods:
-
- * Zlib.version is renamed to ((<Zlib.zlib_version>)).
-
-* Changed constants:
-
- * ((<Zlib::VERSION>)) indicates the version of Ruby/zlib.
- The zlib.h version is now in ((<Zlib::ZLIB_VERSION>)).
-
-* Backward compatibility:
-
- * For backward compatibility for 0.5, the obsoleted methods and
- arguments are still available.
-
- * Obsoleted classes, methods, and constants for backward
- compatibility for 0.4 or earlier are removed.
-
-== Changes from 0.4 to 0.5
-
-Almost all the code are rewritten.
-I hope all changes are enumerated below :-)
-
-* The names of almost classes and some methods are changed.
- All classes and constants are now defined under module
- ((<Zlib>)). The obsoleted names are also available for backward
- compatibility.
-
- * Classes
-
- * Deflate -> ((<Zlib::Deflate>))
- * Inflate -> ((<Zlib::Inflate>))
- * Zlib::Gzip -> ((<Zlib::GzipFile>))
- * GzipReader -> ((<Zlib::GzipReader>))
- * GzipWriter -> ((<Zlib::GzipWriter>))
- * Zlib::Gzip::Error -> ((<Zlib::GzipFile::Error>))
- * Zlib::GzipReader::NoFooter -> ((<Zlib::GzipFile::NoFooter>))
- * Zlib::GzipReader::CRCError -> ((<Zlib::GzipFile::CRCError>))
- * Zlib::GzipReader::LengthError -> ((<Zlib::GzipFile::LengthError>))
-
- * Constants
-
- * Zlib::ZStream::BINARY -> ((<Zlib::BINARY>))
- * Zlib::ZStream::ASCII -> ((<Zlib::ASCII>))
- * Zlib::ZStream::UNKNOWN -> ((<Zlib::UNKNOWN>))
- * Zlib::Deflate::NO_COMPRESSION -> ((<Zlib::NO_COMPRESSION>))
- * Zlib::Deflate::BEST_SPEED -> ((<Zlib::BEST_SPEED>))
- * Zlib::Deflate::BEST_COMPRESSION -> ((<Zlib::BEST_COMPRESSION>))
- * Zlib::Deflate::DEFAULT_COMPRESSION -> ((<Zlib::DEFAULT_COMPRESSION>))
- * Zlib::Deflate::FILTERED -> ((<Zlib::FILTERED>))
- * Zlib::Deflate::HUFFMAN_ONLY -> ((<Zlib::HUFFMAN_ONLY>))
- * Zlib::Deflate::DEFAULT_STRATEGY -> ((<Zlib::DEFAULT_STRATEGY>))
- * Zlib::Deflate::MAX_WBITS -> ((<Zlib::MAX_WBITS>))
- * Zlib::Deflate::DEF_MEM_LEVEL -> ((<Zlib::DEF_MEM_LEVEL>))
- * Zlib::Deflate::MAX_MEM_LEVEL -> ((<Zlib::MAX_MEM_LEVEL>))
- * Zlib::Deflate::NO_FLUSH -> ((<Zlib::NO_FLUSH>))
- * Zlib::Deflate::SYNC_FLUSH -> ((<Zlib::SYNC_FLUSH>))
- * Zlib::Deflate::FULL_FLUSH -> ((<Zlib::FULL_FLUSH>))
- * Zlib::Inflate::MAX_WBITS -> ((<Zlib::MAX_WBITS>))
- * Zlib::GzipReader::OS_* -> ((<Zlib::OS_*|Zlib::OS_CODE>))
-
- * Methods
-
- * Zlib::ZStream#flush_out -> ((<Zlib::ZStream#flush_next_out>))
-
-* Made buffer for input (next_in).
-
-* ((<Zlib::GzipReader#unused>)) returns nil after closing.
-
-* Now you are up to call ((<Zlib::GzipWriter#close>)) explicitly
-to avoid segv in finalizer.
-((<[ruby-dev:11915]|URL:http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-dev/11915>))
-
-* divided initialize from new.
-
-* remove sanity checks for arguments for deflateInit2 and
- inflateInit2.
-
-* adapted the behavior of ((<Zlib::GzipWriter#puts>)) to Ruby-1.7.
-
-* Made all functions static.
-
-
-=end