Crate bytes_parser
source ·Expand description
A simple wrapper to parse primitive Rust types from a slice of bytes [u8]
.
This is the crate for you, if all you need is to parse a bespoke binary protocol. You provide a reference slice of bytes, and assuming you know what those bytes represent, read the original values out of it.
The core of this crate is BytesParser
, built with few principles in mind:
- simplicity: just a thin wrapper around an array of bytes, with a cursor to track progress.
- zero-copy: all you get back is either a bit-copied primitive, or a reference backed by the original bytes - never cloning.
- only primitive types: if you need to serialize/deserialize complex data structures, you probably want serde.
Features
- Parse all primitive scalar types, signed and unsigned,
as well as
&str
and sub-slice of&[u8]
. - Internal, auto-updating cursor, to implement a simple scanning logic.
- Options to move the cursor arbitrarily, but safely, along the input slice.
- Support for Endianness selection (see
ParsingEndian
). - Descriptive errors (see
BytesParserError
). - Minimal dependencies.
Examples
ⓘ
use bytes_parser::{BytesParser, ParsingEndian};
let input: &[u8] = /* a slice of bytes from somewhere */;
// Crate a parser from a given slice of bytes
let mut parser = BytesParser::from(input);
// Will use Big-Endian parsing
assert_eq!(parser.endian(), ParsingEndian::BE);
assert_eq!(ParsingEndian::BE, ParsingEndian::default());
// Parse a string length and the string itself
let str_len = parser.parse_usize()?;
let str = parser.parse_str_utf8(str_len)?;
assert_eq!(str, "Forza Napoli Sempre!");
Alternatives
Structs
- A zero-copy bytes parser, useful when parsing bespoke binary protocols.
Enums
- All the errors that BytesParser can potentially produce.
- Control which endian system to use when parsing raw bytes.