Struct der::SliceReader

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pub struct SliceReader<'a> { /* private fields */ }
Expand description

Reader which consumes an input byte slice.

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impl<'a> SliceReader<'a>

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pub fn new(bytes: &'a [u8]) -> Result<Self>

Create a new slice reader for the given byte slice.

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pub fn error(&mut self, kind: ErrorKind) -> Error

Return an error with the given ErrorKind, annotating it with context about where the error occurred.

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pub fn value_error(&mut self, tag: Tag) -> Error

Return an error for an invalid value with the given tag.

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pub fn is_failed(&self) -> bool

Did the decoding operation fail due to an error?

Trait Implementations§

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impl<'a> Clone for SliceReader<'a>

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fn clone(&self) -> SliceReader<'a>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<'a> Debug for SliceReader<'a>

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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<'a> Reader<'a> for SliceReader<'a>

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fn input_len(&self) -> Length

Get the length of the input.
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fn peek_byte(&self) -> Option<u8>

Peek at the next byte of input without modifying the cursor.
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fn peek_header(&self) -> Result<Header>

Peek forward in the input data, attempting to decode a Header from the data at the current position in the decoder. Read more
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fn position(&self) -> Length

Get the position within the buffer.
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fn read_slice(&mut self, len: Length) -> Result<&'a [u8]>

Attempt to read data borrowed directly from the input as a slice, updating the internal cursor position. Read more
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fn decode<T: Decode<'a>>(&mut self) -> Result<T>

Decode a value which impls the Decode trait.
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fn error(&mut self, kind: ErrorKind) -> Error

Return an error with the given ErrorKind, annotating it with context about where the error occurred.
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fn finish<T>(self, value: T) -> Result<T>

Finish decoding, returning the given value if there is no remaining data, or an error otherwise
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fn remaining_len(&self) -> Length

Get the number of bytes still remaining in the buffer.
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fn context_specific<T>( &mut self, tag_number: TagNumber, tag_mode: TagMode ) -> Result<Option<T>>
where T: DecodeValue<'r> + FixedTag,

Attempt to decode an ASN.1 CONTEXT-SPECIFIC field with the provided TagNumber.
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fn is_finished(&self) -> bool

Have we read all of the input data?
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fn offset(&self) -> Length

Offset within the original input stream. Read more
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fn peek_tag(&self) -> Result<Tag>

Peek at the next byte in the decoder and attempt to decode it as a Tag value. Read more
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fn read_byte(&mut self) -> Result<u8>

Read a single byte.
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fn read_into<'o>(&mut self, buf: &'o mut [u8]) -> Result<&'o [u8]>

Attempt to read input data, writing it into the provided buffer, and returning a slice on success. Read more
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fn read_nested<'n, T, F>(&'n mut self, len: Length, f: F) -> Result<T>
where F: FnOnce(&mut NestedReader<'n, Self>) -> Result<T>,

Read nested data of the given length.
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fn read_vec(&mut self, len: Length) -> Result<Vec<u8>>

Read a byte vector of the given length.
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fn sequence<'n, F, T>(&'n mut self, f: F) -> Result<T>
where F: FnOnce(&mut NestedReader<'n, Self>) -> Result<T>,

Read an ASN.1 SEQUENCE, creating a nested Reader for the body and calling the provided closure with it.
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fn tlv_bytes(&mut self) -> Result<&'r [u8]>

Obtain a slice of bytes contain a complete TLV production suitable for parsing later.

Auto Trait Implementations§

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impl<'a> RefUnwindSafe for SliceReader<'a>

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impl<'a> Send for SliceReader<'a>

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impl<'a> Sync for SliceReader<'a>

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impl<'a> Unpin for SliceReader<'a>

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impl<'a> UnwindSafe for SliceReader<'a>

Blanket Implementations§

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impl<T> Any for T
where 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 T
where 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 T
where 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 T
where 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<T> ToOwned for T
where 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 T
where 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 T
where 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.