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alphabets.rs
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/
alphabets.rs
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use fast32::INVALID_BYTE;
mod base32 {
use fast32::make_base32_alpha;
// only pub for the test below
pub const ENC_CROCKFORD_LOWER: &'static [u8; 32] = b"0123456789abcdefghjkmnpqrstvwxyz";
// also see this defined in base32/alphabet.rs and available in the crate at fast32::base32::CROCKFORD_LOWER
make_base32_alpha!(
CROCKFORD_LOWER,
DEC_CROCKFORD_LOWER,
ENC_CROCKFORD_LOWER,
b"iloABCDEFGHIJKLMNOPQRSTVWXYZ",
b"110abcdefgh1jk1mn0pqrstvwxyz"
);
make_base32_alpha!(
RFC4648_LOWER_NOPAD,
DEC_RFC4648_LOWER,
b"abcdefghijklmnopqrstuvwxyz234567"
);
}
mod base64 {
use fast32::make_base64_alpha;
// only pub for the test below
pub const ENC_BASE64_WEIRD: &'static [u8; 64] =
b"0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_.";
make_base64_alpha!(BASE64_WEIRD, DEC_BASE64_WEIRD, ENC_BASE64_WEIRD);
make_base64_alpha!(
BASE64_WEIRD_FLEX,
DEC_BASE64_WEIRD_FLEX,
ENC_BASE64_WEIRD,
b"!&+,-/|?",
b"_A_._.2v"
);
}
use self::base32::{
CROCKFORD_LOWER, DEC_CROCKFORD_LOWER, ENC_CROCKFORD_LOWER, RFC4648_LOWER_NOPAD,
};
use self::base64::{BASE64_WEIRD, BASE64_WEIRD_FLEX, DEC_BASE64_WEIRD_FLEX, ENC_BASE64_WEIRD};
#[test]
fn crockford_10238() {
let n = 10238;
let x = "9zy";
let s = CROCKFORD_LOWER.encode_u64(n);
assert_eq!(s, x);
assert_eq!(CROCKFORD_LOWER.decode_u64(s.as_bytes()).unwrap(), n);
}
#[test]
fn crockford_1055_confirm() {
let n = 1055;
let x = "10z";
let s = CROCKFORD_LOWER.encode_u64(n);
assert_eq!(s, x);
assert_eq!(CROCKFORD_LOWER.decode_u64(s.as_bytes()).unwrap(), n);
let s = "LoZ";
assert_eq!(CROCKFORD_LOWER.decode_u64(s.as_bytes()).unwrap(), n);
}
#[test]
fn rfc4648_32_10238() {
let n = 10238;
let x = "j76";
let s = RFC4648_LOWER_NOPAD.encode_u64(n);
assert_eq!(s, x);
assert_eq!(RFC4648_LOWER_NOPAD.decode_u64(s.as_bytes()).unwrap(), n);
}
#[test]
fn base64_weird_64_10238() {
let n = 10238;
let x = "2v_";
let s = BASE64_WEIRD.encode_u64(n);
assert_eq!(s, x);
assert_eq!(BASE64_WEIRD.decode_u64(s.as_bytes()).unwrap(), n);
}
#[test]
fn base64_weird_flex_confirm() {
let n = 10238;
let x = "2v_";
let s = BASE64_WEIRD_FLEX.encode_u64(n);
assert_eq!(s, x);
assert_eq!(BASE64_WEIRD_FLEX.decode_u64(s.as_bytes()).unwrap(), n);
let s = "|?!";
assert_eq!(BASE64_WEIRD_FLEX.decode_u64(s.as_bytes()).unwrap(), n);
}
// adapted from src/base32/alphabet test
#[test]
fn confirm_crockford_lower_decode() {
const INVALID_CHAR: char = ' ';
let mut s = String::new();
for i in 0..=255u8 {
let c = i as char;
#[rustfmt::skip]
let c = match c {
'0' | 'o' | 'O' => '0',
'1' | 'i' | 'I' | 'l' | 'L' => '1',
'2' ..= '9' => c,
'u' | 'U' => INVALID_CHAR,
'A' ..= 'Z' => c.to_ascii_lowercase(),
'a' ..= 'z' => c,
_ => INVALID_CHAR,
};
s.push(c);
}
let dec_chars = DEC_CROCKFORD_LOWER
.map(|b| {
if b == INVALID_BYTE {
INVALID_CHAR
} else {
ENC_CROCKFORD_LOWER[b as usize] as char
}
})
.iter()
.collect::<String>();
assert_eq!(dec_chars, s);
}
#[test]
fn confirm_b64_weird_flex_decode() {
const INVALID_CHAR: char = ' ';
let mut s = String::new();
for i in 0..=255u8 {
let c = i as char;
#[rustfmt::skip]
let c = match c {
'!' | '+' | '-' | '_' => '_',
',' | '/' | '.' => '.',
'&' => 'A',
'|' => '2',
'?' => 'v',
'0' ..= '9' => c,
'A' ..= 'Z' => c,
'a' ..= 'z' => c,
_ => INVALID_CHAR,
};
s.push(c);
}
let dec_chars = DEC_BASE64_WEIRD_FLEX
.map(|b| {
if b == INVALID_BYTE {
INVALID_CHAR
} else {
ENC_BASE64_WEIRD[b as usize] as char
}
})
.iter()
.collect::<String>();
assert_eq!(dec_chars, s);
}