C++ (Cpp) squash_csc_reader Examples

Example #1

File: squash-csc.cpp Project: anthrotype/squash

static SquashStatus
squash_csc_process_stream (SquashStream* stream, SquashOperation operation) {
  SquashCscStream* s = (SquashCscStream*) stream;

  s->operation = operation;

  CSCProps props;
  unsigned char props_buf[CSC_PROP_SIZE];

  struct SquashCscInStream istream = { squash_csc_reader, s };
  struct SquashCscOutStream ostream = { squash_csc_writer, s };

  if (stream->stream_type == SQUASH_STREAM_COMPRESS) {
    if (stream->options != NULL) {
      SquashCscOptions* opts = (SquashCscOptions*) stream->options;
      CSCEncProps_Init (&props, opts->dict_size, opts->level);
      props.DLTFilter = opts->enable_delta;
      props.EXEFilter = opts->enable_exe;
      props.TXTFilter = opts->enable_txt;
    } else {
      CSCEncProps_Init (&props, SQUASH_CSC_DEFAULT_DICT_SIZE, SQUASH_CSC_DEFAULT_LEVEL);
    }

    CSCEnc_WriteProperties (&props, props_buf, 0);
    size_t bytes_written = squash_csc_writer(&ostream, props_buf, CSC_PROP_SIZE);
    if (bytes_written != CSC_PROP_SIZE)
      return squash_error (SQUASH_FAILED);

    s->ctx.comp = CSCEnc_Create (&props, (ISeqOutStream*) &ostream);
    CSCEnc_Encode (s->ctx.comp, (ISeqInStream*) &istream, NULL);
    CSCEnc_Encode_Flush (s->ctx.comp);
  } else {
    size_t prop_l = CSC_PROP_SIZE;
    squash_csc_reader (&istream, props_buf, &prop_l);
    if (prop_l != CSC_PROP_SIZE)
      return squash_error (SQUASH_FAILED);

    CSCDec_ReadProperties (&props, props_buf);

    s->ctx.decomp = CSCDec_Create (&props, (ISeqInStream*) &istream);
    CSCDec_Decode (s->ctx.decomp, (ISeqOutStream*) &ostream, NULL);
  }

  return SQUASH_OK;
}

Example #2

File: squash-csc.cpp Project: Dr-Emann/squash

static SquashStatus
squash_csc_splice (SquashCodec* codec,
                   SquashOptions* options,
                   SquashStreamType stream_type,
                   SquashReadFunc read_cb,
                   SquashWriteFunc write_cb,
                   void* user_data) {
  int csc_res;
  SquashStatus res = SQUASH_OK;
  const struct SquashCscInStream in_stream = {
    { squash_csc_reader },
    user_data,
    read_cb,
    write_cb
  };
  const struct SquashCscOutStream out_stream = {
    { squash_csc_writer },
    user_data,
    read_cb,
    write_cb
  };

  CSCProps props;
  unsigned char props_buf[CSC_PROP_SIZE];

  if (stream_type == SQUASH_STREAM_COMPRESS) {
    CSCEncProps_Init (&props,
                      squash_codec_get_option_size_index (codec, options, SQUASH_CSC_OPT_DICT_SIZE),
                      squash_options_get_int_at (options, codec, SQUASH_CSC_OPT_LEVEL));
    props.DLTFilter = squash_options_get_bool_at (options, codec, SQUASH_CSC_OPT_DELTA_FILTER);
    props.EXEFilter = squash_options_get_bool_at (options, codec, SQUASH_CSC_OPT_EXE_FILTER);
    props.TXTFilter = squash_options_get_bool_at (options, codec, SQUASH_CSC_OPT_TXT_FILTER);

    CSCEnc_WriteProperties (&props, props_buf, 0);
    size_t bytes_written = squash_csc_writer ((void*) &out_stream, props_buf, CSC_PROP_SIZE);
    if (SQUASH_UNLIKELY(bytes_written != CSC_PROP_SIZE))
      return squash_error (SQUASH_FAILED);

    CSCEncHandle comp = CSCEnc_Create (&props, (ISeqOutStream*) &out_stream, (ISzAlloc*) &squash_csc_allocator);
    csc_res = CSCEnc_Encode (comp, (ISeqInStream*) &in_stream, NULL);
    if (SQUASH_UNLIKELY(csc_res != 0)) {
      res = squash_error (SQUASH_FAILED);
    } else {
      csc_res = CSCEnc_Encode_Flush (comp);
      if (SQUASH_UNLIKELY(csc_res != 0)) {
        res = squash_error (SQUASH_FAILED);
      }
    }
    CSCEnc_Destroy (comp);
  } else {
    size_t prop_l = CSC_PROP_SIZE;
    squash_csc_reader ((void*) &in_stream, props_buf, &prop_l);
    if (SQUASH_UNLIKELY(prop_l != CSC_PROP_SIZE))
      return squash_error (SQUASH_FAILED);

    CSCDec_ReadProperties (&props, props_buf);

    CSCDecHandle decomp = CSCDec_Create (&props, (ISeqInStream*) &in_stream, (ISzAlloc*) &squash_csc_allocator);
    csc_res = CSCDec_Decode (decomp, (ISeqOutStream*) &out_stream, NULL);
    if (csc_res != 0) {
      res = squash_error (SQUASH_FAILED);
    }
    CSCDec_Destroy (decomp);
  }

  return res;
}