Struct ReaderConfig 

pub struct ReaderConfig {
    pub max_segment_bytes: usize,
    pub max_segments: Option<usize>,
    pub max_input_bytes: Option<u64>,
    pub max_messages: Option<usize>,
}

Configuration for reader-based EDIFACT parsers.

Pass to from_reader_with_config or from_bufread_stream_with_config to override default limits.

Example

use edifact_rs::{ReaderConfig, from_reader_with_config};

let cfg = ReaderConfig::default().max_segment_bytes(4_096);
let segments: Vec<_> = from_reader_with_config(b"BGM+220+1+9'".as_ref(), cfg)
    .collect::<Result<_, _>>()
    .unwrap();
assert_eq!(segments[0].tag, "BGM");

Fields

max_segment_bytes: usize

Maximum allowed segment byte length (excluding the segment terminator).

If a segment accumulates more bytes than this limit without a terminator the parser returns EdifactError::SegmentTooLong. This prevents unbounded allocation when processing malformed or adversarially crafted input streams.

Default: 65 536 bytes (64 KiB). Real-world EDIFACT segments are almost always below 4 KiB; consider using a tighter limit for untrusted inputs.

max_segments: Option<usize>

Maximum number of segments to yield before the stream stops.

Once this many segments have been produced the segment stream returns None, effectively truncating the message. Useful for preventing resource exhaustion when the total segment count in a message is expected to be bounded.

Default: None (unlimited).

max_input_bytes: Option<u64>

Maximum total input bytes to consume before the stream stops.

The budget is checked before each segment is read. If bytes_consumed >= max_input_bytes at that point the stream stops immediately without reading any further data. A segment whose bytes push bytes_consumed above the threshold is still yielded (parsing cannot be abandoned mid-segment), but no subsequent segment will be started. Use in combination with max_segment_bytes for defence-in-depth against maliciously large inputs.

Default: None (unlimited).

max_messages: Option<usize>

Maximum number of EDIFACT messages (UNH/UNT pairs) to process before the stream stops.

Once this many complete messages have been yielded the stream returns None. Useful for rate-limiting or sampling large interchanges without parsing the entire file.

Default: None (unlimited).

Implementations

impl ReaderConfig

pub fn max_segment_bytes(self, limit: usize) -> Self

Set the maximum segment byte length and return self.

pub fn max_segments(self, limit: usize) -> Self

Set the maximum number of segments to yield and return self.

pub fn max_input_bytes(self, limit: u64) -> Self

Set the maximum total input bytes to consume and return self.

pub fn max_messages(self, limit: usize) -> Self

Set the maximum number of EDIFACT messages (UNH/UNT pairs) to yield and return self.

Trait Implementations

impl Clone for ReaderConfig

fn clone(&self) -> ReaderConfig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ReaderConfig

impl Debug for ReaderConfig

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

Formats the value using the given formatter.

impl Default for ReaderConfig

fn default() -> Self

Returns the “default value” for a type.