# Struct base64::read::DecoderReader [−] [src]

    pub struct DecoderReader<'a, R: 'a + Read> { /* fields omitted */ }

A `Read` implementation that decodes base64 data read from an underlying reader.

# Examples

    use std::io::Read;
    use std::io::Cursor;

    // use a cursor as the simplest possible `Read` -- in real code this is probably a file, etc.
    let mut wrapped_reader = Cursor::new(b"YXNkZg==");
    let mut decoder = base64::read::DecoderReader::new(
        &mut wrapped_reader, base64::STANDARD);

    // handle errors as you normally would
    let mut result = Vec::new();
    decoder.read_to_end(&mut result).unwrap();

    assert_eq!(b"asdf", &result[..]);

## Implementations

### `impl<'a, R: Read> DecoderReader<'a, R>` [src]

#### `pub fn new(r: &'a mut R, config: Config) -> Self` [src]

Create a new decoder that will read from the provided reader `r`.

## Trait Implementations

### `impl<'a, R: Read> Debug for DecoderReader<'a, R>` [src]

#### `fn fmt(&self, f: &mut Formatter<'_>) -> Result` [src]

Formats the value using the given formatter. Read more

### `impl<'a, R: Read> Read for DecoderReader<'a, R>` [src]

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

Decode input from the wrapped reader.

Under non-error circumstances, this returns `Ok` with the value being the number of bytes written in `buf`.

Where possible, this function buffers base64 to minimize the number of read() calls to the delegate reader.

# Errors

Any errors emitted by the delegate reader are returned. Decoding errors due to invalid base64 are also possible, and will have `io::ErrorKind::InvalidData`.

#### `pub fn read_vectored(
&mut self,
bufs: &mut [IoSliceMut<'_>]
) -> Result<usize, Error>`1.36.0 [src]

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

#### `pub fn is_read_vectored(&self) -> bool` [src]

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

Determines if this `Read`er has an efficient `read_vectored` implementation. Read more

#### `pub unsafe fn initializer(&self) -> Initializer` [src]

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

Determines if this `Read`er can work with buffers of uninitialized memory. Read more

#### `pub fn read_to_end(&mut self, buf: &mut Vec<u8, Global>) -> Result<usize, Error>`1.0.0 [src]

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

#### `pub fn read_to_string(&mut self, buf: &mut String) -> Result<usize, Error>`1.0.0 [src]

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

#### `pub fn read_exact(&mut self, buf: &mut [u8]) -> Result<(), Error>`1.6.0 [src]

Read the exact number of bytes required to fill `buf`. Read more

#### `pub fn by_ref(&mut self) -> &mut Self` 1.0.0 [src]

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

#### `pub fn bytes(self) -> Bytes<Self>`1.0.0 [src]

Transforms this `Read` instance to an `Iterator` over its bytes. Read more

#### `pub fn chain<R>(self, next: R) -> Chain<Self, R> where
R: Read,` 1.0.0 [src]

Creates an adaptor which will chain this stream with another. Read more

#### `pub fn take(self, limit: u64) -> Take<Self>`1.0.0 [src]

Creates an adaptor which will read at most `limit` bytes from it. Read more

## Auto Trait Implementations

### `impl<'a, R> RefUnwindSafe for DecoderReader<'a, R> where
R: RefUnwindSafe,`

### `impl<'a, R> Send for DecoderReader<'a, R> where
R: Send,`

### `impl<'a, R> Sync for DecoderReader<'a, R> where
R: Sync,`

### `impl<'a, R> Unpin for DecoderReader<'a, R>`

### `impl<'a, R> !UnwindSafe for DecoderReader<'a, R>`

## Blanket Implementations

### `impl<T> Any for T where
T: 'static + ?Sized,` [src]

#### `pub fn type_id(&self) -> TypeId` [src]

Gets the `TypeId` of `self`. Read more

### `impl<T> Borrow<T> for T where
T: ?Sized,` [src]

#### `pub fn borrow(&self) -> &T` [src]

Immutably borrows from an owned value. Read more

### `impl<T> BorrowMut<T> for T where
T: ?Sized,` [src]

#### `pub fn borrow_mut(&mut self) -> &mut T` [src]

Mutably borrows from an owned value. Read more

### `impl<T> From<T> for T` [src]

#### `pub fn from(t: T) -> T` [src]

Performs the conversion.

### `impl<T, U> Into<U> for T where
U: From<T>,` [src]

#### `pub fn into(self) -> U` [src]

Performs the conversion.

### `impl<T, U> TryFrom<U> for T where
U: Into<T>,` [src]

#### `type Error = Infallible`

The type returned in the event of a conversion error.

#### `pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>` [src]

Performs the conversion.

### `impl<T, U> TryInto<U> for T where
U: TryFrom<T>,` [src]

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

The type returned in the event of a conversion error.

#### `pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>` [src]

Performs the conversion.