bool Msg::read_from(BlockReader& reader)
{
if (!reader.readUInt8((uint8_t*)&type)) return false;
if (!reader.readSlice(key)) return false;
if (type == Put) {
if (!reader.readSlice(value)) return false;
}
return true;
}
bool Layout::read_superblock(BlockReader& reader)
{
if (!reader.readUInt64(&(superblock_->magic_number))) return false;
if (!reader.readUInt8(&(superblock_->major_version))) return false;
if (!reader.readUInt8(&(superblock_->minor_version))) return false;
bool has_index_block_meta;
if (!reader.readBool(&has_index_block_meta)) return false;
if (has_index_block_meta) {
superblock_->index_block_meta = new BlockMeta();
if (!read_block_meta(superblock_->index_block_meta, reader)) return false;
}
if (!reader.readUInt16(&(superblock_->crc))) return false;
return true;
}
bool Layout::read_superblock(BlockReader& reader)
{
if (!reader.readUInt64(&(superblock_->magic_number0))) return false;
if (!reader.readUInt8(&(superblock_->major_version))) return false;
if (!reader.readUInt8(&(superblock_->minor_version))) return false;
bool has_index_block_meta;
if (!reader.readBool(&has_index_block_meta)) return false;
if (has_index_block_meta) {
superblock_->index_block_meta = new BlockMeta();
if (!read_block_meta(superblock_->index_block_meta, reader)) return false;
}
if (!reader.readUInt64(&(superblock_->magic_number1))) return false;
if (superblock_->magic_number0 != SUPER_BLOCK_MAGIC_NUM ||
superblock_->magic_number0 != superblock_->magic_number1) {
LOG_ERROR("read superblock " "magic_num0:"<< superblock_->magic_number0
<< ", magic_num1:" << superblock_->magic_number1);
return false;
}
return true;
}