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
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
// Copyright 2015-2016 Mozilla Foundation. See the COPYRIGHT
// file at the top-level directory of this distribution.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use handles::*;
use variant::*;
use super::*;
pub struct UserDefinedDecoder;
impl UserDefinedDecoder {
pub fn new() -> VariantDecoder {
VariantDecoder::UserDefined(UserDefinedDecoder)
}
pub fn max_utf16_buffer_length(&self, byte_length: usize) -> Option<usize> {
Some(byte_length)
}
pub fn max_utf8_buffer_length_without_replacement(&self, byte_length: usize) -> Option<usize> {
byte_length.checked_mul(3)
}
pub fn max_utf8_buffer_length(&self, byte_length: usize) -> Option<usize> {
byte_length.checked_mul(3)
}
decoder_functions!({},
{},
{},
{
if b < 0x80 {
// XXX optimize ASCII
destination_handle.write_ascii(b);
continue;
}
destination_handle.write_upper_bmp((b as usize + 0xF700usize) as u16);
continue;
},
self,
src_consumed,
dest,
source,
b,
destination_handle,
_unread_handle,
check_space_bmp);
}
pub struct UserDefinedEncoder;
impl UserDefinedEncoder {
pub fn new(encoding: &'static Encoding) -> Encoder {
Encoder::new(encoding, VariantEncoder::UserDefined(UserDefinedEncoder))
}
pub fn max_buffer_length_from_utf16_without_replacement(&self,
u16_length: usize)
-> Option<usize> {
Some(u16_length)
}
pub fn max_buffer_length_from_utf8_without_replacement(&self,
byte_length: usize)
-> Option<usize> {
Some(byte_length)
}
encoder_functions!({},
{
if c <= '\u{7F}' {
// TODO optimize ASCII run
destination_handle.write_one(c as u8);
continue;
}
if c < '\u{F780}' || c > '\u{F7FF}' {
return (EncoderResult::Unmappable(c),
unread_handle.consumed(),
destination_handle.written());
}
destination_handle.write_one((c as usize - 0xF700usize) as u8);
continue;
},
self,
src_consumed,
source,
dest,
c,
destination_handle,
unread_handle,
check_space_one);
}
// Any copyright to the test code below this comment is dedicated to the
// Public Domain. http://creativecommons.org/publicdomain/zero/1.0/
#[cfg(test)]
mod tests {
use super::super::testing::*;
use super::super::*;
fn decode_x_user_defined(bytes: &[u8], expect: &str) {
decode(X_USER_DEFINED, bytes, expect);
}
fn encode_x_user_defined(string: &str, expect: &[u8]) {
encode(X_USER_DEFINED, string, expect);
}
#[test]
fn test_x_user_defined_decode() {
// Empty
decode_x_user_defined(b"", "");
// ASCII
decode_x_user_defined(b"\x61\x62", "\u{0061}\u{0062}");
decode_x_user_defined(b"\x80\xFF", "\u{F780}\u{F7FF}");
}
#[test]
fn test_x_user_defined_encode() {
// Empty
encode_x_user_defined("", b"");
// ASCII
encode_x_user_defined("\u{0061}\u{0062}", b"\x61\x62");
encode_x_user_defined("\u{F780}\u{F7FF}", b"\x80\xFF");
encode_x_user_defined("\u{F77F}\u{F800}", b"");
}
}