Struct ndk::asset::Asset

pub struct Asset { /* private fields */ }

A native AAsset *, opened in streaming mode

use std::io::Read;

let asset = asset_manager
    .open(&CString::new("path/to/asset").unwrap())
    .expect("Could not open asset");

let mut data = vec![];
asset.read_to_end(&mut data);
// ... use data ...

Implementations

impl Asset

pub unsafe fn from_ptr(ptr: NonNull<AAsset>) -> Self

Construct an Asset from the native AAsset *. This gives ownership of the AAsset * to the Asset, which will handle closing the asset. Avoid using the pointer after calling this function.

Safety

By calling this function, you assert that it points to a valid native AAsset, open in the streaming mode.

pub fn ptr(&self) -> NonNull<AAsset>

The corresponding native AAsset *

pub fn get_length(&self) -> usize

Returns the total length of the asset, in bytes

pub fn get_remaining_length(&self) -> usize

Returns the remaining length of the asset, in bytes

pub fn get_buffer(&mut self) -> Result<&[u8]>

Reads all data into a buffer and returns it

Trait Implementations

impl Debug for Asset

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

Formats the value using the given formatter.

impl Drop for Asset

fn drop(&mut self)

Executes the destructor for this type.

impl Read for Asset

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.

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

Like read, except that it reads into a slice of buffers.

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.

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

Read all bytes until EOF in this source, placing them into buf.

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

Read all bytes until EOF in this source, appending them to buf.

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

Read the exact number of bytes required to fill buf.

fn read_buf(&mut self, buf: &mut ReadBuf<'_>) -> Result<(), Error>

🔬 This is a nightly-only experimental API. (read_buf)

Pull some bytes from this source into the specified buffer.

fn read_buf_exact(&mut self, buf: &mut ReadBuf<'_>) -> Result<(), Error>

🔬 This is a nightly-only experimental API. (read_buf)

Read the exact number of bytes required to fill buf.

fn by_ref(&mut self) -> &mut Self

Creates a “by reference” adaptor for this instance of Read.

fn bytes(self) -> Bytes<Self>

Transforms this Read instance to an Iterator over its bytes.

fn chain<R>(self, next: R) -> Chain<Self, R> where
    R: Read, 

Creates an adapter which will chain this stream with another.

fn take(self, limit: u64) -> Take<Self>

Creates an adapter which will read at most limit bytes from it.

impl Seek for Asset

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

Seek to an offset, in bytes, in a stream.

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

Rewind to the beginning of a stream.

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).

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

Returns the current seek position from the start of the stream.