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.
Until rust-lang/cargo#7915 is fixed, you may need to add the following to your .cargo/config.toml to use this library in no-std or no-alloc environments:
[unstable]
features = ["host_dep"]
You can define a compile-time byte slice from an encoded string literal:
const HELLO_SLICE: &'static [u8] = &data_encoding_macro::hexlower!("68656c6c6f");
const FOOBAR_SLICE: &'static [u8] = &data_encoding_macro::base64!("Zm9vYmFy");
You can also define a compile-time byte array from an encoded string literal:
data_encoding_macro::hexlower_array!("const HELLO" = "68656c6c6f");
data_encoding_macro::base64_array!("const FOOBAR" = "Zm9vYmFy");
You can define a compile-time custom encoding from its specification:
const HEX: data_encoding::Encoding = data_encoding_macro::new_encoding! {
symbols: "0123456789abcdef",
translate_from: "ABCDEF",
translate_to: "abcdef",
};
const BASE64: data_encoding::Encoding = data_encoding_macro::new_encoding! {
symbols: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/",
padding: '=',
};
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