C++ (Cpp) lto_uncompress_block Examples

Example #1

File: lto-section-in.c Project: pjump/gcc

const char *
lto_get_section_data (struct lto_file_decl_data *file_data,
		      enum lto_section_type section_type,
		      const char *name,
		      size_t *len, bool decompress)
{
  const char *data = (get_section_f) (file_data, section_type, name, len);
  const size_t header_length = sizeof (struct lto_data_header);
  struct lto_data_header *header;
  struct lto_buffer buffer;
  struct lto_compression_stream *stream;
  lto_stats.section_size[section_type] += *len;

  if (data == NULL)
    return NULL;

  /* WPA->ltrans streams are not compressed with exception of function bodies
     and variable initializers that has been verbatim copied from earlier
     compilations.  */
  if (!flag_ltrans || decompress)
    {
      /* Create a mapping header containing the underlying data and length,
	 and prepend this to the uncompression buffer.  The uncompressed data
	 then follows, and a pointer to the start of the uncompressed data is
	 returned.  */
      header = (struct lto_data_header *) xmalloc (header_length);
      header->data = data;
      header->len = *len;

      buffer.data = (char *) header;
      buffer.length = header_length;

      stream = lto_start_uncompression (lto_append_data, &buffer);
      lto_uncompress_block (stream, data, *len);
      lto_end_uncompression (stream);

      *len = buffer.length - header_length;
      data = buffer.data + header_length;
    }

  lto_check_version (((const lto_header *)data)->major_version,
		     ((const lto_header *)data)->minor_version);
  return data;
}

Example #2

const char *
lto_get_section_data (struct lto_file_decl_data *file_data,
		      enum lto_section_type section_type,
		      const char *name,
		      size_t *len)
{
  const char *data = (get_section_f) (file_data, section_type, name, len);
  const size_t header_length = sizeof (struct lto_data_header);
  struct lto_data_header *header;
  struct lto_buffer buffer;
  struct lto_compression_stream *stream;
  lto_stats.section_size[section_type] += *len;

  if (data == NULL)
    return NULL;

  /* FIXME lto: WPA mode does not write compressed sections, so for now
     suppress uncompression if flag_ltrans.  */
  if (!flag_ltrans)
    {
      /* Create a mapping header containing the underlying data and length,
	 and prepend this to the uncompression buffer.  The uncompressed data
	 then follows, and a pointer to the start of the uncompressed data is
	 returned.  */
      header = (struct lto_data_header *) xmalloc (header_length);
      header->data = data;
      header->len = *len;

      buffer.data = (char *) header;
      buffer.length = header_length;

      stream = lto_start_uncompression (lto_append_data, &buffer);
      lto_uncompress_block (stream, data, *len);
      lto_end_uncompression (stream);

      *len = buffer.length - header_length;
      data = buffer.data + header_length;
    }

  lto_check_version (((const lto_header *)data)->major_version,
		     ((const lto_header *)data)->minor_version);
  return data;
}