Class: Zstdlib::GzipFile

Inherits:
Object
  • Object
show all
Defined in:
ext/zstdlib/ruby/zlib-2.7/zstdlib.c,
ext/zstdlib/ruby/zlib-2.7/zstdlib.c,
ext/zstdlib/ruby/zlib-2.6/zstdlib.c,
ext/zstdlib/ruby/zlib-2.6/zstdlib.c,
ext/zstdlib/ruby/zlib-2.5/zstdlib.c,
ext/zstdlib/ruby/zlib-2.5/zstdlib.c,
ext/zstdlib/ruby/zlib-2.4/zstdlib.c,
ext/zstdlib/ruby/zlib-2.4/zstdlib.c,
ext/zstdlib/ruby/zlib-2.3/zstdlib.c,
ext/zstdlib/ruby/zlib-2.3/zstdlib.c,
ext/zstdlib/ruby/zlib-2.2/zstdlib.c,
ext/zstdlib/ruby/zlib-2.2/zstdlib.c

Overview

Zstdlib::GzipFile is an abstract class for handling a gzip formatted compressed file. The operations are defined in the subclasses, Zstdlib::GzipReader for reading, and Zstdlib::GzipWriter for writing.

GzipReader should be used by associating an IO, or IO-like, object.

== Method Catalogue

  • ::wrap
  • ::open (Zstdlib::GzipReader::open and Zstdlib::GzipWriter::open)
  • #close
  • #closed?
  • #comment
  • comment= (Zstdlib::GzipWriter#comment=)
  • #crc
  • eof? (Zstdlib::GzipReader#eof?)
  • #finish
  • #level
  • lineno (Zstdlib::GzipReader#lineno)
  • lineno= (Zstdlib::GzipReader#lineno=)
  • #mtime
  • mtime= (Zstdlib::GzipWriter#mtime=)
  • #orig_name
  • orig_name (Zstdlib::GzipWriter#orig_name=)
  • #os_code
  • path (when the underlying IO supports #path)
  • #sync
  • #sync=
  • #to_io

(due to internal structure, documentation may appear under Zstdlib::GzipReader or Zstdlib::GzipWriter)

Direct Known Subclasses

GzipReader, GzipWriter

Defined Under Namespace

Classes: CRCError, Error, LengthError, NoFooter

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.wrap(*args) ⇒ Object

call-seq: Zstdlib::GzipReader.wrap(io, ...) { |gz| ... } Zstdlib::GzipWriter.wrap(io, ...) { |gz| ... }

Creates a GzipReader or GzipWriter associated with +io+, passing in any necessary extra options, and executes the block with the newly created object just like File.open.

The GzipFile object will be closed automatically after executing the block. If you want to keep the associated IO object open, you may call Zstdlib::GzipFile#finish method in the block.



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# File 'ext/zstdlib/ruby/zlib-2.7/zstdlib.c', line 3098

static VALUE
rb_gzfile_s_wrap(int argc, VALUE *argv, VALUE klass)
{
    return gzfile_wrap(argc, argv, klass, 0);
}

Instance Method Details

#close ⇒ Object

Closes the GzipFile object. This method calls close method of the associated IO object. Returns the associated IO object.



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# File 'ext/zstdlib/ruby/zlib-2.7/zstdlib.c', line 3322

static VALUE
rb_gzfile_close(VALUE obj)
{
    struct gzfile *gz;
    VALUE io;

    TypedData_Get_Struct(obj, struct gzfile, &gzfile_data_type, gz);
    if (!ZSTREAM_IS_READY(&gz->z)) {
        return Qnil;
    }
    io = gz->io;
    gzfile_close(gz, 1);
    return io;
}

#closed? ⇒ Boolean

Same as IO#closed?

Returns:

  • (Boolean) 


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# File 'ext/zstdlib/ruby/zlib-2.7/zstdlib.c', line 3361

static VALUE
rb_gzfile_closed_p(VALUE obj)
{
    struct gzfile *gz;
    TypedData_Get_Struct(obj, struct gzfile, &gzfile_data_type, gz);
    return NIL_P(gz->io) ? Qtrue : Qfalse;
}

#comment ⇒ Object

Returns comments recorded in the gzip file header, or nil if the comments is not present.



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# File 'ext/zstdlib/ruby/zlib-2.7/zstdlib.c', line 3198

static VALUE
rb_gzfile_comment(VALUE obj)
{
    VALUE str = get_gzfile(obj)->comment;
    if (!NIL_P(str)) {
  str = rb_str_dup(str);
    }
    return str;
}

#crc ⇒ Object

Returns CRC value of the uncompressed data.



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# File 'ext/zstdlib/ruby/zlib-2.7/zstdlib.c', line 3137

static VALUE
rb_gzfile_crc(VALUE obj)
{
    return rb_uint2inum(get_gzfile(obj)->crc);
}

#finish ⇒ Object

Closes the GzipFile object. Unlike Zstdlib::GzipFile#close, this method never calls the close method of the associated IO object. Returns the associated IO object.



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# File 'ext/zstdlib/ruby/zlib-2.7/zstdlib.c', line 3344

static VALUE
rb_gzfile_finish(VALUE obj)
{
    struct gzfile *gz = get_gzfile(obj);
    VALUE io;

    io = gz->io;
    gzfile_close(gz, 0);
    return io;
}

#level ⇒ Object

Returns compression level.



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# File 'ext/zstdlib/ruby/zlib-2.7/zstdlib.c', line 3159

static VALUE
rb_gzfile_level(VALUE obj)
{
    return INT2FIX(get_gzfile(obj)->level);
}

#mtime ⇒ Object

Returns last modification time recorded in the gzip file header.



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# File 'ext/zstdlib/ruby/zlib-2.7/zstdlib.c', line 3148

static VALUE
rb_gzfile_mtime(VALUE obj)
{
    return rb_time_new(get_gzfile(obj)->mtime, (time_t)0);
}

#orig_name ⇒ Object

Returns original filename recorded in the gzip file header, or +nil+ if original filename is not present.



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# File 'ext/zstdlib/ruby/zlib-2.7/zstdlib.c', line 3182

static VALUE
rb_gzfile_orig_name(VALUE obj)
{
    VALUE str = get_gzfile(obj)->orig_name;
    if (!NIL_P(str)) {
  str = rb_str_dup(str);
    }
    return str;
}

#os_code ⇒ Object

Returns OS code number recorded in the gzip file header.



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# File 'ext/zstdlib/ruby/zlib-2.7/zstdlib.c', line 3170

static VALUE
rb_gzfile_os_code(VALUE obj)
{
    return INT2FIX(get_gzfile(obj)->os_code);
}

#sync ⇒ Object

Same as IO#sync



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# File 'ext/zstdlib/ruby/zlib-2.7/zstdlib.c', line 3387

static VALUE
rb_gzfile_sync(VALUE obj)
{
    return (get_gzfile(obj)->z.flags & GZFILE_FLAG_SYNC) ? Qtrue : Qfalse;
}

#sync=(mode) ⇒ Object

call-seq: sync = flag

Same as IO. If flag is +true+, the associated IO object must respond to the +flush+ method. While +sync+ mode is +true+, the compression ratio decreases sharply.



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# File 'ext/zstdlib/ruby/zlib-2.7/zstdlib.c', line 3402

static VALUE
rb_gzfile_set_sync(VALUE obj, VALUE mode)
{
    struct gzfile *gz = get_gzfile(obj);

    if (RTEST(mode)) {
  gz->z.flags |= GZFILE_FLAG_SYNC;
    }
    else {
  gz->z.flags &= ~GZFILE_FLAG_SYNC;
    }
    return mode;
}

#to_io ⇒ Object

Same as IO.



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# File 'ext/zstdlib/ruby/zlib-2.7/zstdlib.c', line 3126

static VALUE
rb_gzfile_to_io(VALUE obj)
{
    return get_gzfile(obj)->io;
}