Struct TtcWriter 

pub struct TtcWriter { /* private fields */ }

Implementations

impl TtcWriter

pub fn new() -> Self

pub fn with_capacity(capacity: usize) -> Self

A writer whose backing buffer is preallocated to capacity bytes. A TtcWriter::new() starts at zero capacity, so a payload built from many small write_* pushes grows the Vec through several doublings — each a separate heap allocation. Sizing the buffer once (to a small-payload default or an exact known length) collapses those growth reallocs to a single allocation. The written bytes are byte-identical either way; this is a pure allocation optimization.

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

pub fn write_u8(&mut self, value: u8)

pub fn write_u16be(&mut self, value: u16)

pub fn write_u16le(&mut self, value: u16)

pub fn write_u32be(&mut self, value: u32)

pub fn write_u64be(&mut self, value: u64)

pub fn write_ub2(&mut self, value: u16)

pub fn write_ub4(&mut self, value: u32)

pub fn write_ub8(&mut self, value: u64)

pub fn write_seq_num(&mut self)

pub fn write_raw(&mut self, value: &[u8])

pub fn write_bytes_with_length(&mut self, value: &[u8]) -> Result<()>

pub fn write_bytes_with_two_lengths( &mut self, value: Option<&[u8]>, ) -> Result<()>

pub fn write_str_two_lengths(&mut self, value: &str) -> Result<()>

pub fn write_sb4(&mut self, value: i32)

Writes a 32-bit signed integer in Oracle universal (sign-magnitude) format: a length byte whose high bit (0x80) is set for negatives, followed by the big-endian magnitude bytes. Mirrors the reference WriteBuffer.write_sb4 (impl/base/buffer.pyx).

pub fn write_keyword_value_pair( &mut self, text_value: Option<&[u8]>, binary_value: Option<&[u8]>, keyword: u16, ) -> Result<()>

Writes a keyword/value pair (text and binary values plus a ub2 keyword) as used by the AQ message-property extension list. Mirrors the reference WriteBuffer.write_keyword_value_pair (impl/thin/packet.pyx:859).

pub fn write_function_code(&mut self, function_code: u8)

pub fn write_function_code_with_seq(&mut self, function_code: u8, seq_num: u8)

pub fn write_function_header( &mut self, function_code: u8, seq_num: u8, ttc_field_version: u8, )

Function-message header with the version-gated ub8 pipeline-token field (reference messages/base.pyx _write_function_code): the token exists only when the negotiated ttc field version is >= 23.1 ext 1. A pre-23ai server parses a stray token byte as message content and fails the call (observed live: ORA-03120 on Oracle XE 21c).

pub fn write_piggyback_header( &mut self, function_code: u8, seq_num: u8, ttc_field_version: u8, )

Piggyback-message header with the same version-gated token field (reference messages/base.pyx piggyback write path).

Trait Implementations

impl Clone for TtcWriter

fn clone(&self) -> TtcWriter

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TtcWriter

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

Formats the value using the given formatter.

impl Default for TtcWriter

fn default() -> TtcWriter

Returns the “default value” for a type.

impl Eq for TtcWriter

impl PartialEq for TtcWriter

fn eq(&self, other: &TtcWriter) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for TtcWriter