Module: OodleKraken

Defined in:
ext/oodle-kraken/oodle_kraken_c.c

Class Method Summary collapse

Class Method Details

.decompress(str, decompressed_size) ⇒ String

decompress an Oodle compressed string

Parameters:

  • str (String) —

    the string to decompress

  • decompressed_size (Integer) —

    the size of the decompressed data

Returns:

  • (String) —

    the decompressed string



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# File 'ext/oodle-kraken/oodle_kraken_c.c', line 9

static VALUE  decompress_p(VALUE self, VALUE in_str, VALUE decompressed_size) {
  (void)self;
  VALUE out_str = Qnil;
  Check_Type(in_str, T_STRING);
  size_t out_sz = NUM2ULL(decompressed_size);
  size_t in_sz = RSTRING_LEN(in_str);
  const uint8_t *in_ptr = RSTRING_PTR(in_str);

  uint8_t *out_ptr = malloc((long)out_sz + SAFE_SPACE);
  if (!out_ptr)
    rb_raise(rb_eRuntimeError, "Decompression Error");
  ssize_t out_bytes = Kraken_Decompress(in_ptr, in_sz, out_ptr, out_sz);
  if (out_bytes < 0 || (size_t)out_bytes != out_sz)
    rb_raise(rb_eRuntimeError, "Decompression Error");
  out_str = rb_str_buf_new((long)out_sz);
  rb_str_cat(out_str, out_ptr, out_sz);
  return out_str;
}