pub struct SizeCursor<I: Size> { /* private fields */ }
Expand description

Adapts a ReadAt or WriteAt into a Read or Write, with better seeking.

This is just like Cursor, except that it requires an object that implements Size, and that it can seek from the end of the I/O object.

Eventually it will be legal to specialize Cursor for types that implement Size, see RFC 1210.

Implementations§

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impl<I: Size> SizeCursor<I>

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pub fn new_pos(io: I, pos: u64) -> Self

Create a new SizeCursor which starts reading at a specified offset.

Pass in a ReadAt or WriteAt as io.

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pub fn new(io: I) -> Self

Create a new SizeCursor which starts reading at offset zero.

Pass in a ReadAt or WriteAt as io.

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pub fn as_cursor(&self) -> &Cursor<I>

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pub fn as_cursor_mut(&mut self) -> &mut Cursor<I>

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pub fn into_cursor(self) -> Cursor<I>

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pub fn into_inner(self) -> I

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pub fn get_ref(&self) -> &I

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pub fn get_mut(&mut self) -> &mut I

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pub fn position(&self) -> u64

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pub fn set_position(&mut self, pos: u64)

Trait Implementations§

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impl<I: Clone + Size> Clone for SizeCursor<I>

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fn clone(&self) -> SizeCursor<I>

Returns a copy of the value. Read more
1.0.0 · source§

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

Performs copy-assignment from source. Read more
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impl<I: Debug + Size> Debug for SizeCursor<I>

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

Formats the value using the given formatter. Read more
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impl<I: Size + ReadAt> Read for SizeCursor<I>

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fn read(&mut self, buf: &mut [u8]) -> Result<usize>

Pull some bytes from this source into the specified buffer, returning how many bytes were read. Read more
1.36.0 · source§

fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> Result<usize, Error>

Like read, except that it reads into a slice of buffers. Read more
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fn is_read_vectored(&self) -> bool

🔬This is a nightly-only experimental API. (can_vector)
Determines if this Reader has an efficient read_vectored implementation. Read more
1.0.0 · source§

fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize, Error>

Read all bytes until EOF in this source, placing them into buf. Read more
1.0.0 · source§

fn read_to_string(&mut self, buf: &mut String) -> Result<usize, Error>

Read all bytes until EOF in this source, appending them to buf. Read more
1.6.0 · source§

fn read_exact(&mut self, buf: &mut [u8]) -> Result<(), Error>

Read the exact number of bytes required to fill buf. Read more
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fn read_buf(&mut self, buf: BorrowedCursor<'_>) -> Result<(), Error>

🔬This is a nightly-only experimental API. (read_buf)
Pull some bytes from this source into the specified buffer. Read more
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fn read_buf_exact(&mut self, cursor: BorrowedCursor<'_>) -> Result<(), Error>

🔬This is a nightly-only experimental API. (read_buf)
Read the exact number of bytes required to fill cursor. Read more
1.0.0 · source§

fn by_ref(&mut self) -> &mut Selfwhere Self: Sized,

Creates a “by reference” adaptor for this instance of Read. Read more
1.0.0 · source§

fn bytes(self) -> Bytes<Self>where Self: Sized,

Transforms this Read instance to an Iterator over its bytes. Read more
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fn chain<R>(self, next: R) -> Chain<Self, R>where R: Read, Self: Sized,

Creates an adapter which will chain this stream with another. Read more
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fn take(self, limit: u64) -> Take<Self>where Self: Sized,

Creates an adapter which will read at most limit bytes from it. Read more
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impl<I: Size> Seek for SizeCursor<I>

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fn seek(&mut self, pos: SeekFrom) -> Result<u64>

Seek to an offset, in bytes, in a stream. Read more
1.55.0 · source§

fn rewind(&mut self) -> Result<(), Error>

Rewind to the beginning of a stream. Read more
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fn stream_len(&mut self) -> Result<u64, Error>

🔬This is a nightly-only experimental API. (seek_stream_len)
Returns the length of this stream (in bytes). Read more
1.51.0 · source§

fn stream_position(&mut self) -> Result<u64, Error>

Returns the current seek position from the start of the stream. Read more
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fn seek_relative(&mut self, offset: i64) -> Result<(), Error>

🔬This is a nightly-only experimental API. (seek_seek_relative)
Seeks relative to the current position. Read more
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impl<I: Size + WriteAt> Write for SizeCursor<I>

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fn write(&mut self, buf: &[u8]) -> Result<usize>

Write a buffer into this writer, returning how many bytes were written. Read more
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fn flush(&mut self) -> Result<()>

Flush this output stream, ensuring that all intermediately buffered contents reach their destination. Read more
1.36.0 · source§

fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result<usize, Error>

Like write, except that it writes from a slice of buffers. Read more
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fn is_write_vectored(&self) -> bool

🔬This is a nightly-only experimental API. (can_vector)
Determines if this Writer has an efficient write_vectored implementation. Read more
1.0.0 · source§

fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>

Attempts to write an entire buffer into this writer. Read more
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fn write_all_vectored(&mut self, bufs: &mut [IoSlice<'_>]) -> Result<(), Error>

🔬This is a nightly-only experimental API. (write_all_vectored)
Attempts to write multiple buffers into this writer. Read more
1.0.0 · source§

fn write_fmt(&mut self, fmt: Arguments<'_>) -> Result<(), Error>

Writes a formatted string into this writer, returning any error encountered. Read more
1.0.0 · source§

fn by_ref(&mut self) -> &mut Selfwhere Self: Sized,

Creates a “by reference” adapter for this instance of Write. Read more

Auto Trait Implementations§

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impl<I> RefUnwindSafe for SizeCursor<I>where I: RefUnwindSafe,

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impl<I> Send for SizeCursor<I>where I: Send,

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impl<I> Sync for SizeCursor<I>where I: Sync,

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impl<I> Unpin for SizeCursor<I>where I: Unpin,

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impl<I> UnwindSafe for SizeCursor<I>where I: UnwindSafe,

Blanket Implementations§

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<R> ReadBytesExt for Rwhere R: Read + ?Sized,

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fn read_u8(&mut self) -> Result<u8, Error>

Reads an unsigned 8 bit integer from the underlying reader. Read more
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fn read_i8(&mut self) -> Result<i8, Error>

Reads a signed 8 bit integer from the underlying reader. Read more
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fn read_u16<T>(&mut self) -> Result<u16, Error>where T: ByteOrder,

Reads an unsigned 16 bit integer from the underlying reader. Read more
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fn read_i16<T>(&mut self) -> Result<i16, Error>where T: ByteOrder,

Reads a signed 16 bit integer from the underlying reader. Read more
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fn read_u24<T>(&mut self) -> Result<u32, Error>where T: ByteOrder,

Reads an unsigned 24 bit integer from the underlying reader. Read more
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fn read_i24<T>(&mut self) -> Result<i32, Error>where T: ByteOrder,

Reads a signed 24 bit integer from the underlying reader. Read more
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fn read_u32<T>(&mut self) -> Result<u32, Error>where T: ByteOrder,

Reads an unsigned 32 bit integer from the underlying reader. Read more
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fn read_i32<T>(&mut self) -> Result<i32, Error>where T: ByteOrder,

Reads a signed 32 bit integer from the underlying reader. Read more
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fn read_u48<T>(&mut self) -> Result<u64, Error>where T: ByteOrder,

Reads an unsigned 48 bit integer from the underlying reader. Read more
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fn read_i48<T>(&mut self) -> Result<i64, Error>where T: ByteOrder,

Reads a signed 48 bit integer from the underlying reader. Read more
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fn read_u64<T>(&mut self) -> Result<u64, Error>where T: ByteOrder,

Reads an unsigned 64 bit integer from the underlying reader. Read more
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fn read_i64<T>(&mut self) -> Result<i64, Error>where T: ByteOrder,

Reads a signed 64 bit integer from the underlying reader. Read more
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fn read_u128<T>(&mut self) -> Result<u128, Error>where T: ByteOrder,

Reads an unsigned 128 bit integer from the underlying reader. Read more
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fn read_i128<T>(&mut self) -> Result<i128, Error>where T: ByteOrder,

Reads a signed 128 bit integer from the underlying reader. Read more
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fn read_uint<T>(&mut self, nbytes: usize) -> Result<u64, Error>where T: ByteOrder,

Reads an unsigned n-bytes integer from the underlying reader. Read more
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fn read_int<T>(&mut self, nbytes: usize) -> Result<i64, Error>where T: ByteOrder,

Reads a signed n-bytes integer from the underlying reader. Read more
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fn read_uint128<T>(&mut self, nbytes: usize) -> Result<u128, Error>where T: ByteOrder,

Reads an unsigned n-bytes integer from the underlying reader.
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fn read_int128<T>(&mut self, nbytes: usize) -> Result<i128, Error>where T: ByteOrder,

Reads a signed n-bytes integer from the underlying reader.
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fn read_f32<T>(&mut self) -> Result<f32, Error>where T: ByteOrder,

Reads a IEEE754 single-precision (4 bytes) floating point number from the underlying reader. Read more
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fn read_f64<T>(&mut self) -> Result<f64, Error>where T: ByteOrder,

Reads a IEEE754 double-precision (8 bytes) floating point number from the underlying reader. Read more
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fn read_u16_into<T>(&mut self, dst: &mut [u16]) -> Result<(), Error>where T: ByteOrder,

Reads a sequence of unsigned 16 bit integers from the underlying reader. Read more
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fn read_u32_into<T>(&mut self, dst: &mut [u32]) -> Result<(), Error>where T: ByteOrder,

Reads a sequence of unsigned 32 bit integers from the underlying reader. Read more
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fn read_u64_into<T>(&mut self, dst: &mut [u64]) -> Result<(), Error>where T: ByteOrder,

Reads a sequence of unsigned 64 bit integers from the underlying reader. Read more
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fn read_u128_into<T>(&mut self, dst: &mut [u128]) -> Result<(), Error>where T: ByteOrder,

Reads a sequence of unsigned 128 bit integers from the underlying reader. Read more
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fn read_i8_into(&mut self, dst: &mut [i8]) -> Result<(), Error>

Reads a sequence of signed 8 bit integers from the underlying reader. Read more
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fn read_i16_into<T>(&mut self, dst: &mut [i16]) -> Result<(), Error>where T: ByteOrder,

Reads a sequence of signed 16 bit integers from the underlying reader. Read more
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fn read_i32_into<T>(&mut self, dst: &mut [i32]) -> Result<(), Error>where T: ByteOrder,

Reads a sequence of signed 32 bit integers from the underlying reader. Read more
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fn read_i64_into<T>(&mut self, dst: &mut [i64]) -> Result<(), Error>where T: ByteOrder,

Reads a sequence of signed 64 bit integers from the underlying reader. Read more
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fn read_i128_into<T>(&mut self, dst: &mut [i128]) -> Result<(), Error>where T: ByteOrder,

Reads a sequence of signed 128 bit integers from the underlying reader. Read more
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fn read_f32_into<T>(&mut self, dst: &mut [f32]) -> Result<(), Error>where T: ByteOrder,

Reads a sequence of IEEE754 single-precision (4 bytes) floating point numbers from the underlying reader. Read more
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fn read_f32_into_unchecked<T>(&mut self, dst: &mut [f32]) -> Result<(), Error>where T: ByteOrder,

👎Deprecated since 1.2.0: please use read_f32_into instead
DEPRECATED. Read more
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fn read_f64_into<T>(&mut self, dst: &mut [f64]) -> Result<(), Error>where T: ByteOrder,

Reads a sequence of IEEE754 double-precision (8 bytes) floating point numbers from the underlying reader. Read more
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fn read_f64_into_unchecked<T>(&mut self, dst: &mut [f64]) -> Result<(), Error>where T: ByteOrder,

👎Deprecated since 1.2.0: please use read_f64_into instead
DEPRECATED. Read more
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impl<T> ToOwned for Twhere T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<W> WriteBytesExt for Wwhere W: Write + ?Sized,

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fn write_u8(&mut self, n: u8) -> Result<(), Error>

Writes an unsigned 8 bit integer to the underlying writer. Read more
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fn write_i8(&mut self, n: i8) -> Result<(), Error>

Writes a signed 8 bit integer to the underlying writer. Read more
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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fn write_u128<T>(&mut self, n: u128) -> Result<(), Error>where T: ByteOrder,

Writes an unsigned 128 bit integer to the underlying writer.
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fn write_i128<T>(&mut self, n: i128) -> Result<(), Error>where T: ByteOrder,

Writes a signed 128 bit integer to the underlying writer.
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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
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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
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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
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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
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fn write_f32<T>(&mut self, n: f32) -> Result<(), Error>where T: ByteOrder,

Writes a IEEE754 single-precision (4 bytes) floating point number to the underlying writer. Read more
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fn write_f64<T>(&mut self, n: f64) -> Result<(), Error>where T: ByteOrder,

Writes a IEEE754 double-precision (8 bytes) floating point number to the underlying writer. Read more