Method: Zstdlib::Deflate#params

Defined in:
ext/zstdlib_c/ruby/zlib-3.2/zstdlib.c,
ext/zstdlib_c/ruby/zlib-3.1/zstdlib.c,
ext/zstdlib_c/ruby/zlib-3.0/zstdlib.c,
ext/zstdlib_c/ruby/zlib-2.7/zstdlib.c,
ext/zstdlib_c/ruby/zlib-2.6/zstdlib.c,
ext/zstdlib_c/ruby/zlib-2.5/zstdlib.c,
ext/zstdlib_c/ruby/zlib-2.4/zstdlib.c,
ext/zstdlib_c/ruby/zlib-2.3/zstdlib.c,
ext/zstdlib_c/ruby/zlib-2.2/zstdlib.c

#params(v_level, v_strategy) ⇒ Object

call-seq: params(level, strategy)

Changes the parameters of the deflate stream to allow changes between different types of data that require different types of compression. Any unprocessed data is flushed before changing the params.

See Zstdlib::Deflate.new for a description of +level+ and +strategy+.



1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
 
# File 'ext/zstdlib_c/ruby/zlib-3.2/zstdlib.c', line 1880

static VALUE
rb_deflate_params(VALUE obj, VALUE v_level, VALUE v_strategy)
{
    struct zstream *z = get_zstream(obj);
    int level, strategy;
    int err;
    uInt n;
    long filled;

    level = ARG_LEVEL(v_level);
    strategy = ARG_STRATEGY(v_strategy);

    n = z->stream.avail_out;
    err = deflateParams(&z->stream, level, strategy);
    filled = n - z->stream.avail_out;
    while (err == Z_BUF_ERROR) {
  rb_warning("deflateParams() returned Z_BUF_ERROR");
  zstream_expand_buffer(z);
  rb_str_set_len(z->buf, RSTRING_LEN(z->buf) + filled);
  n = z->stream.avail_out;
  err = deflateParams(&z->stream, level, strategy);
  filled = n - z->stream.avail_out;
    }
    if (err != Z_OK) {
  raise_zlib_error(err, z->stream.msg);
    }
    rb_str_set_len(z->buf, RSTRING_LEN(z->buf) + filled);

    return Qnil;
}