pub struct StableWriter<M: StableMemory = CanisterStableMemory> { /* private fields */ }
Expand description
A writer to the stable memory.
Warning: This will overwrite any existing data in stable memory as it writes, so ensure you set
the offset
value accordingly if you wish to preserve existing data.
Will attempt to grow the memory as it writes, and keep offsets and total capacity.
Implementations
sourceimpl<M: StableMemory> StableWriter<M>
impl<M: StableMemory> StableWriter<M>
sourcepub fn with_memory(memory: M, offset: usize) -> Self
pub fn with_memory(memory: M, offset: usize) -> Self
Creates a new StableWriter
which writes to the selected memory
Trait Implementations
sourceimpl Default for StableWriter
impl Default for StableWriter
sourceimpl<M: StableMemory> Write for StableWriter<M>
impl<M: StableMemory> Write for StableWriter<M>
sourcefn write(&mut self, buf: &[u8]) -> Result<usize, Error>
fn write(&mut self, buf: &[u8]) -> Result<usize, Error>
Write a buffer into this writer, returning how many bytes were written. Read more
sourcefn flush(&mut self) -> Result<(), Error>
fn flush(&mut self) -> Result<(), Error>
Flush this output stream, ensuring that all intermediately buffered contents reach their destination. Read more
sourcefn is_write_vectored(&self) -> bool
fn is_write_vectored(&self) -> bool
can_vector
)Determines if this Write
r has an efficient write_vectored
implementation. Read more
1.0.0 · sourcefn write_all(&mut self, buf: &[u8]) -> Result<(), Error>
fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>
Attempts to write an entire buffer into this writer. Read more
sourcefn write_all_vectored(&mut self, bufs: &mut [IoSlice<'_>]) -> Result<(), Error>
fn write_all_vectored(&mut self, bufs: &mut [IoSlice<'_>]) -> Result<(), Error>
write_all_vectored
)Attempts to write multiple buffers into this writer. Read more
Auto Trait Implementations
impl<M> RefUnwindSafe for StableWriter<M> where
M: RefUnwindSafe,
impl<M> Send for StableWriter<M> where
M: Send,
impl<M> Sync for StableWriter<M> where
M: Sync,
impl<M> Unpin for StableWriter<M> where
M: Unpin,
impl<M> UnwindSafe for StableWriter<M> where
M: UnwindSafe,
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
impl<W> WriteBytesExt for W where
W: Write + ?Sized,
impl<W> WriteBytesExt for W where
W: Write + ?Sized,
fn write_u8(&mut self, n: u8) -> Result<(), Error>
fn write_u8(&mut self, n: u8) -> Result<(), Error>
Writes an unsigned 8 bit integer to the underlying writer. Read more
fn write_i8(&mut self, n: i8) -> Result<(), Error>
fn write_i8(&mut self, n: i8) -> Result<(), Error>
Writes a signed 8 bit integer to the underlying writer. Read more
fn write_u16<T>(&mut self, n: u16) -> Result<(), Error> where
T: ByteOrder,
fn write_u16<T>(&mut self, n: u16) -> Result<(), Error> where
T: ByteOrder,
Writes an unsigned 16 bit integer to the underlying writer. Read more
fn write_i16<T>(&mut self, n: i16) -> Result<(), Error> where
T: ByteOrder,
fn write_i16<T>(&mut self, n: i16) -> Result<(), Error> where
T: ByteOrder,
Writes a signed 16 bit integer to the underlying writer. Read more
fn write_u24<T>(&mut self, n: u32) -> Result<(), Error> where
T: ByteOrder,
fn write_u24<T>(&mut self, n: u32) -> Result<(), Error> where
T: ByteOrder,
Writes an unsigned 24 bit integer to the underlying writer. Read more
fn write_i24<T>(&mut self, n: i32) -> Result<(), Error> where
T: ByteOrder,
fn write_i24<T>(&mut self, n: i32) -> Result<(), Error> where
T: ByteOrder,
Writes a signed 24 bit integer to the underlying writer. Read more
fn write_u32<T>(&mut self, n: u32) -> Result<(), Error> where
T: ByteOrder,
fn write_u32<T>(&mut self, n: u32) -> Result<(), Error> where
T: ByteOrder,
Writes an unsigned 32 bit integer to the underlying writer. Read more
fn write_i32<T>(&mut self, n: i32) -> Result<(), Error> where
T: ByteOrder,
fn write_i32<T>(&mut self, n: i32) -> Result<(), Error> where
T: ByteOrder,
Writes a signed 32 bit integer to the underlying writer. Read more
fn write_u48<T>(&mut self, n: u64) -> Result<(), Error> where
T: ByteOrder,
fn write_u48<T>(&mut self, n: u64) -> Result<(), Error> where
T: ByteOrder,
Writes an unsigned 48 bit integer to the underlying writer. Read more
fn write_i48<T>(&mut self, n: i64) -> Result<(), Error> where
T: ByteOrder,
fn write_i48<T>(&mut self, n: i64) -> Result<(), Error> where
T: ByteOrder,
Writes a signed 48 bit integer to the underlying writer. Read more
fn write_u64<T>(&mut self, n: u64) -> Result<(), Error> where
T: ByteOrder,
fn write_u64<T>(&mut self, n: u64) -> Result<(), Error> where
T: ByteOrder,
Writes an unsigned 64 bit integer to the underlying writer. Read more
fn write_i64<T>(&mut self, n: i64) -> Result<(), Error> where
T: ByteOrder,
fn write_i64<T>(&mut self, n: i64) -> Result<(), Error> where
T: ByteOrder,
Writes a signed 64 bit integer to the underlying writer. Read more
fn write_u128<T>(&mut self, n: u128) -> Result<(), Error> where
T: ByteOrder,
fn write_u128<T>(&mut self, n: u128) -> Result<(), Error> where
T: ByteOrder,
Writes an unsigned 128 bit integer to the underlying writer.
fn write_i128<T>(&mut self, n: i128) -> Result<(), Error> where
T: ByteOrder,
fn write_i128<T>(&mut self, n: i128) -> Result<(), Error> where
T: ByteOrder,
Writes a signed 128 bit integer to the underlying writer.
fn write_uint<T>(&mut self, n: u64, nbytes: usize) -> Result<(), Error> where
T: ByteOrder,
fn write_uint<T>(&mut self, n: u64, nbytes: usize) -> Result<(), Error> where
T: ByteOrder,
Writes an unsigned n-bytes integer to the underlying writer. Read more
fn write_int<T>(&mut self, n: i64, nbytes: usize) -> Result<(), Error> where
T: ByteOrder,
fn write_int<T>(&mut self, n: i64, nbytes: usize) -> Result<(), Error> where
T: ByteOrder,
Writes a signed n-bytes integer to the underlying writer. Read more
fn write_uint128<T>(&mut self, n: u128, nbytes: usize) -> Result<(), Error> where
T: ByteOrder,
fn write_uint128<T>(&mut self, n: u128, nbytes: usize) -> Result<(), Error> where
T: ByteOrder,
Writes an unsigned n-bytes integer to the underlying writer. Read more
fn write_int128<T>(&mut self, n: i128, nbytes: usize) -> Result<(), Error> where
T: ByteOrder,
fn write_int128<T>(&mut self, n: i128, nbytes: usize) -> Result<(), Error> where
T: ByteOrder,
Writes a signed n-bytes integer to the underlying writer. Read more