Struct Header 

pub struct Header {
    pub version: u16,
    pub index_policy: u16,
    pub created_at: u32,
    pub start_index_ptr: u32,
    pub end_index_ptr: u32,
}

Fields

version: u16

版本号

index_policy: u16

索引策略

created_at: u32

xdb创建时间,时间戳(秒)

start_index_ptr: u32

索引起始位置

end_index_ptr: u32

索引结束位置

Implementations

impl Header

pub fn new(data: &[u8]) -> Result<Self, Box<dyn Error>>

Trait Implementations

impl Clone for Header

fn clone(&self) -> Header

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Header

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for Header

fn eq(&self, other: &Header) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<'a_, C_: Context> Readable<'a_, C_> for Header

fn read_from<R_: Reader<'a_, C_>>(_reader_: &mut R_) -> Result<Self, C_::Error>

fn minimum_bytes_needed() -> usize

fn read_from_buffer(buffer: &'a [u8]) -> Result<Self, <C as Context>::Error>

where Self: DefaultContext<Context = C>, C: Default,

Deserializes from a given buffer.

fn read_with_length_from_buffer( buffer: &'a [u8], ) -> (Result<Self, <C as Context>::Error>, usize)

where Self: DefaultContext<Context = C>, C: Default,

Deserializes from a given buffer while also returning the amount of bytes consumed.

fn read_from_buffer_copying_data( buffer: &[u8], ) -> Result<Self, <C as Context>::Error>

where Self: DefaultContext<Context = C>, C: Default,

Deserializes from a given buffer.

fn read_with_length_from_buffer_copying_data( buffer: &[u8], ) -> (Result<Self, <C as Context>::Error>, usize)

where Self: DefaultContext<Context = C>, C: Default,

Deserializes from a given buffer while also returning the amount of bytes consumed.

fn read_from_stream_unbuffered( stream: impl Read, ) -> Result<Self, <C as Context>::Error>

where Self: DefaultContext<Context = C>, C: Default,

Reads from a given stream without any buffering.

fn read_from_stream_buffered( stream: impl Read, ) -> Result<Self, <C as Context>::Error>

where Self: DefaultContext<Context = C>, C: Default,

Reads from a given stream with internal buffering.

fn read_from_file(path: impl AsRef<Path>) -> Result<Self, <C as Context>::Error>

where Self: DefaultContext<Context = C>, C: Default,

fn read_from_buffer_with_ctx( context: C, buffer: &'a [u8], ) -> Result<Self, <C as Context>::Error>

fn read_with_length_from_buffer_with_ctx( context: C, buffer: &'a [u8], ) -> (Result<Self, <C as Context>::Error>, usize)

fn read_from_buffer_copying_data_with_ctx( context: C, buffer: &[u8], ) -> Result<Self, <C as Context>::Error>

fn read_with_length_from_buffer_copying_data_with_ctx( context: C, buffer: &[u8], ) -> (Result<Self, <C as Context>::Error>, usize)

fn read_with_length_from_buffer_copying_data_with_ctx_mut( context: &mut C, buffer: &[u8], ) -> (Result<Self, <C as Context>::Error>, usize)

fn read_from_stream_unbuffered_with_ctx<S>( context: C, stream: S, ) -> Result<Self, <C as Context>::Error>

where S: Read,

fn read_from_stream_buffered_with_ctx<S>( context: C, stream: S, ) -> Result<Self, <C as Context>::Error>

where S: Read,

fn read_from_file_with_ctx( context: C, path: impl AsRef<Path>, ) -> Result<Self, <C as Context>::Error>

impl<C_: Context> Writable<C_> for Header

fn write_to<T_: ?Sized + Writer<C_>>( &self, _writer_: &mut T_, ) -> Result<(), C_::Error>

fn write_to_buffer( &self, buffer: &mut [u8], ) -> Result<(), <C as Context>::Error>

where Self: DefaultContext<Context = C>, C: Default,

fn write_to_vec(&self) -> Result<Vec<u8>, <C as Context>::Error>

where Self: DefaultContext<Context = C>, C: Default,

fn write_to_stream<S>(&self, stream: S) -> Result<(), <C as Context>::Error>

where S: Write, Self: DefaultContext<Context = C>, C: Default,

fn write_to_file( &self, path: impl AsRef<Path>, ) -> Result<(), <C as Context>::Error>

where Self: DefaultContext<Context = C>, C: Default,

fn write_to_buffer_with_ctx( &self, context: C, buffer: &mut [u8], ) -> Result<(), <C as Context>::Error>

fn write_to_buffer_with_ctx_mut( &self, context: &mut C, buffer: &mut [u8], ) -> Result<(), <C as Context>::Error>

fn write_to_vec_with_ctx( &self, context: C, ) -> Result<Vec<u8>, <C as Context>::Error>

fn write_to_vec_with_ctx_mut( &self, context: &mut C, ) -> Result<Vec<u8>, <C as Context>::Error>

fn write_to_stream_with_ctx<S>( &self, context: C, stream: S, ) -> Result<(), <C as Context>::Error>

where S: Write,

fn write_to_file_with_ctx( &self, context: C, path: impl AsRef<Path>, ) -> Result<(), <C as Context>::Error>

fn bytes_needed(&self) -> Result<usize, <C as Context>::Error>

impl StructuralPartialEq for Header