Method: Zstdlib::GzipReader#initialize

Defined in:
ext/zstdlib/ruby/zlib-2.6/zstdlib.c,
ext/zstdlib/ruby/zlib-2.5/zstdlib.c,
ext/zstdlib/ruby/zlib-2.4/zstdlib.c,
ext/zstdlib/ruby/zlib-2.3/zstdlib.c,
ext/zstdlib/ruby/zlib-2.2/zstdlib.c

#initialize(*args) ⇒ Object

call-seq: Zstdlib::GzipReader.new(io, options = {})

Creates a GzipReader object associated with +io+. The GzipReader object reads gzipped data from +io+, and parses/decompresses it. The +io+ must have a +read+ method that behaves same as the IO#read.

The +options+ hash may be used to set the encoding of the data. +:external_encoding+, +:internal_encoding+ and +:encoding+ may be set as in IO::new.

If the gzip file header is incorrect, raises an Zstdlib::GzipFile::Error exception.



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# File 'ext/zstdlib/ruby/zlib-2.6/zstdlib.c', line 3772

static VALUE
rb_gzreader_initialize(int argc, VALUE *argv, VALUE obj)
{
    VALUE io, opt = Qnil;
    struct gzfile *gz;
    int err;

    TypedData_Get_Struct(obj, struct gzfile, &gzfile_data_type, gz);
    rb_scan_args(argc, argv, "1:", &io, &opt);

    /* this is undocumented feature of zlib */
    err = inflateInit2(&gz->z.stream, -MAX_WBITS);
    if (err != Z_OK) {
	raise_zlib_error(err, gz->z.stream.msg);
    }
    gz->io = io;
    ZSTREAM_READY(&gz->z);
    gzfile_read_header(gz, Qnil);
    rb_gzfile_ecopts(gz, opt);

    if (rb_respond_to(io, id_path)) {
	gz->path = rb_funcall(gz->io, id_path, 0);
	rb_define_singleton_method(obj, "path", rb_gzfile_path, 0);
    }

    return obj;
}