Crate data_encoding_macro
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Macros for data-encoding
This library provides macros to define compile-time byte arrays from encoded strings (using common bases like base64, base32, or hexadecimal, and also custom bases). It also provides a macro to define compile-time custom encodings to be used with the data-encoding crate at run-time.
If you were familiar with the binary_macros crate, this library is actually inspired from it.
If you use a nightly compiler, you may disable the “stable” feature:
data-encoding-macro = { version = "0.1.5", default-features = false }
Examples
You can define a compile-time byte slice from an encoded string literal:
#[macro_use]
extern crate data_encoding_macro;
const HELLO_SLICE: &'static [u8] = &hexlower!("68656c6c6f");
const FOOBAR_SLICE: &'static [u8] = &base64!("Zm9vYmFy");
When you disable the “stable” feature (and use a nightly compiler), you can also define a compile-time byte array from an encoded string literal:
hexlower_array!("const HELLO" = "68656c6c6f");
base64_array!("const FOOBAR" = "Zm9vYmFy");
You can define a compile-time custom encoding from its specification:
extern crate data_encoding;
#[macro_use]
extern crate data_encoding_macro;
use data_encoding::Encoding;
const HEX: Encoding = new_encoding!{
symbols: "0123456789abcdef",
translate_from: "ABCDEF",
translate_to: "abcdef",
};
const BASE64: Encoding = new_encoding!{
symbols: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/",
padding: '=',
};