Struct EncodeBuf 

pub struct EncodeBuf { /* private fields */ }

Buffer for BER encoding that writes backwards.

This approach avoids needing to pre-calculate content lengths: we write the content first, then prepend the length and tag.

Implementations

impl EncodeBuf

pub fn new() -> Self

Create a new encode buffer with default capacity.

pub fn with_capacity(capacity: usize) -> Self

Create a new encode buffer with specified capacity.

pub fn push_byte(&mut self, byte: u8)

Push a single byte (prepends to front).

pub fn push_bytes(&mut self, bytes: &[u8])

Push multiple bytes (prepends to front, reversed).

pub fn push_bytes_raw(&mut self, bytes: &[u8])

Push bytes without reversing (for content that’s already in correct order).

pub fn push_length(&mut self, len: usize)

Push a BER length encoding.

pub fn push_tag(&mut self, tag: u8)

Push a BER tag.

pub fn len(&self) -> usize

Get the current length of encoded data.

pub fn is_empty(&self) -> bool

Check if buffer is empty.

pub fn push_constructed<F>(&mut self, tag: u8, f: F)

where F: FnOnce(&mut Self),

Encode a constructed type (SEQUENCE, PDU, etc).

Calls the closure to encode contents, then wraps with length and tag.

pub fn push_sequence<F>(&mut self, f: F)

where F: FnOnce(&mut Self),

Encode a SEQUENCE.

pub fn push_integer(&mut self, value: i32)

Encode an INTEGER.

pub fn push_integer64(&mut self, value: u64)

Encode a 64-bit integer (for Counter64).

pub fn push_unsigned32(&mut self, tag: u8, value: u32)

Encode an unsigned 32-bit integer with a specific tag.

pub fn push_octet_string(&mut self, data: &[u8])

Encode an OCTET STRING.

pub fn push_null(&mut self)

Encode a NULL.

pub fn push_oid(&mut self, oid: &Oid)

Encode an OBJECT IDENTIFIER.

pub fn push_ip_address(&mut self, addr: [u8; 4])

Encode an IP address.

pub fn finish(self) -> Bytes

Finalize and return the encoded bytes.

The buffer is reversed to produce the correct order.

pub fn finish_vec(self) -> Vec<u8>

Finalize and return as Vec<u8>.

Trait Implementations

impl Default for EncodeBuf

fn default() -> Self

Returns the “default value” for a type.