Files
aho_corasick
ansi_term
atty
backtrace
backtrace_sys
bitflags
blindbid
block_buffer
block_padding
bulletproofs
byte_tools
byteorder
cfg_if
chrono
clap
clear_on_drop
curve25519_dalek
digest
dusk_blindbidproof
dusk_tlv
dusk_uds
env_logger
failure
failure_derive
fake_simd
futures
futures_channel
futures_core
futures_executor
futures_io
futures_macro
futures_sink
futures_task
futures_util
async_await
future
io
lock
sink
stream
task
generic_array
humantime
keccak
lazy_static
libc
log
memchr
merlin
num_cpus
num_integer
num_traits
opaque_debug
packed_simd
pin_utils
proc_macro2
proc_macro_hack
proc_macro_nested
quick_error
quote
rand
rand_chacha
rand_core
rand_hc
rand_isaac
rand_jitter
rand_os
rand_pcg
rand_xorshift
regex
regex_syntax
rustc_demangle
serde
serde_derive
sha2
sha3
slab
strsim
subtle
syn
synstructure
termcolor
textwrap
thread_local
time
typenum
unicode_width
unicode_xid
vec_map
 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
use lib::*;

const TAG_CONT: u8 = 0b1000_0000;
const TAG_TWO_B: u8 = 0b1100_0000;
const TAG_THREE_B: u8 = 0b1110_0000;
const TAG_FOUR_B: u8 = 0b1111_0000;
const MAX_ONE_B: u32 = 0x80;
const MAX_TWO_B: u32 = 0x800;
const MAX_THREE_B: u32 = 0x10000;

#[inline]
pub fn encode(c: char) -> Encode {
    let code = c as u32;
    let mut buf = [0; 4];
    let pos = if code < MAX_ONE_B {
        buf[3] = code as u8;
        3
    } else if code < MAX_TWO_B {
        buf[2] = (code >> 6 & 0x1F) as u8 | TAG_TWO_B;
        buf[3] = (code & 0x3F) as u8 | TAG_CONT;
        2
    } else if code < MAX_THREE_B {
        buf[1] = (code >> 12 & 0x0F) as u8 | TAG_THREE_B;
        buf[2] = (code >> 6 & 0x3F) as u8 | TAG_CONT;
        buf[3] = (code & 0x3F) as u8 | TAG_CONT;
        1
    } else {
        buf[0] = (code >> 18 & 0x07) as u8 | TAG_FOUR_B;
        buf[1] = (code >> 12 & 0x3F) as u8 | TAG_CONT;
        buf[2] = (code >> 6 & 0x3F) as u8 | TAG_CONT;
        buf[3] = (code & 0x3F) as u8 | TAG_CONT;
        0
    };
    Encode { buf: buf, pos: pos }
}

pub struct Encode {
    buf: [u8; 4],
    pos: usize,
}

impl Encode {
    pub fn as_str(&self) -> &str {
        str::from_utf8(&self.buf[self.pos..]).unwrap()
    }
}