Module: QuickLZ

Defined in:
ext/qlzruby.c

Constant Summary collapse

VERSION = 
rb_str_new2(VERSION)

Class Method Summary collapse

Class Method Details

.block_compress(v_src) ⇒ Object 



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# File 'ext/qlzruby.c', line 34

static VALUE qlzruby_block_compress(VALUE self, VALUE v_src) {
  VALUE v_dst;
  char *src, *dst, *scratch;
  size_t len;

  Check_Type(v_src, T_STRING);
  src = RSTRING_PTR(v_src);
  len = RSTRING_LEN(v_src);
  dst = xmalloc(len + 400);
  scratch = xmalloc(SCRATCH_COMPRESS);
  memset(scratch, 0, SCRATCH_COMPRESS); 
  len = qlz_compress(src, dst, len, scratch);
  v_dst = rb_str_new(dst, len);
  xfree(scratch);
  xfree(dst);

  return v_dst;
}

.block_decompress(v_src) ⇒ Object 



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# File 'ext/qlzruby.c', line 54

static VALUE qlzruby_block_decompress(VALUE self, VALUE v_src) {
  VALUE v_dst;
  char *src, *dst, *scratch;
  size_t len;

  Check_Type(v_src, T_STRING);
  src = RSTRING_PTR(v_src);
  len = qlz_size_decompressed(src);
  dst = xmalloc(len);
  scratch = xmalloc(SCRATCH_DECOMPRESS);
  memset(scratch, 0, SCRATCH_DECOMPRESS); 
  len = qlz_decompress(src, dst, scratch);
  v_dst = rb_str_new(dst, len);
  xfree(scratch);
  xfree(dst);

  return v_dst;
}

.stream_compress(*args) ⇒ Object 



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# File 'ext/qlzruby.c', line 74

static VALUE qlzruby_stream_compress(int argc, const VALUE *argv, VALUE self) {
  VALUE in, out, blocksize, v_src, v_dst;
  char *src, *dst, *scratch;
  size_t len, i_blocksize;

  rb_scan_args(argc, argv, "21", &in, &out, &blocksize);
  Check_IO(in);
  Check_IO(out);

  if (NIL_P(blocksize)) {
    blocksize = INT2FIX(DEFAULT_BLOCKSIZE);
    i_blocksize = DEFAULT_BLOCKSIZE;
  } else {
    i_blocksize = NUM2LONG(blocksize);

    if (i_blocksize < 1) {
      blocksize = INT2FIX(DEFAULT_BLOCKSIZE);
      i_blocksize = DEFAULT_BLOCKSIZE;
    }
  }

  dst = alloca(i_blocksize + 400);
  scratch = alloca(SCRATCH_COMPRESS);
  memset(scratch, 0, SCRATCH_COMPRESS); 

  while (1) {
    v_src = rb_funcall(in, rb_intern("read"), 1, blocksize);

    if (NIL_P(v_src)) { break; }

    src = RSTRING_PTR(v_src);
    len = RSTRING_LEN(v_src);

    if (len < 1) { break; }

    len = qlz_compress(src, dst, len, scratch);
    v_dst = rb_str_new(dst, len);
    rb_funcall(out, rb_intern("write"), 1, v_dst);
  }

  return Qnil;
}

.stream_decompress(in, out) ⇒ Object 



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# File 'ext/qlzruby.c', line 152

static VALUE qlzruby_stream_decompress(VALUE self, VALUE in, VALUE out) {
  char *scratch;

  Check_IO(in);
  Check_IO(out);

  scratch = alloca(SCRATCH_DECOMPRESS);
  memset(scratch, 0, SCRATCH_DECOMPRESS); 

  while (1) {
    int len = qlzruby_stream_decompress_block(in, out, scratch);

    if (len < 1) {
      break;
    }
  }

  return Qnil;

}