Rust常用库之处理hex数据hex-literal

需求

十六进制数据解码为raw data（vec）、将字节序列转换为十六进制表示

hex-literal

官方：https://docs.rs/releases/search?query=hex_literal

This crate provides the hex! macro for converting hexadecimal string literals to a byte array at compile time.

It accepts the following characters in the input string:

• ‘0’…‘9’, ‘a’…‘f’, ‘A’…‘F’ — hex characters which will be used in construction of the output byte array
• ’ ', ‘\r’, ‘\n’, ‘\t’ — formatting characters which will be ignored

Examples

const DATA: [u8; 4] = hex!(“01020304”);

assert_eq!(DATA, [1, 2, 3, 4]);
assert_eq!(hex!(“a1 b2 c3 d4”), [0xA1, 0xB2, 0xC3, 0xD4]);
assert_eq!(hex!(“E5 E6 90 92”), [0xE5, 0xE6, 0x90, 0x92]);
assert_eq!(hex!(“0a0B 0C0d”), [10, 11, 12, 13]);
let bytes = hex!("
00010203 04050607
08090a0b 0c0d0e0f
");
assert_eq!(bytes, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]);
assert_eq!(hex!(“0a0B // 0c0d line comments”), [10, 11]);
assert_eq!(hex!(“0a0B // line comments
0c0d”), [10, 11, 12, 13]);
assert_eq!(hex!(“0a0B /* block comments / 0c0d"), [10, 11, 12, 13]);
assert_eq!(hex!("0a0B / multi-line
block comments
*/ 0c0d”), [10, 11, 12, 13]);