1 use std::fmt;
2 use std::fmt::Formatter;
3
4 use crate::RawOsStr;
5
6 pub(crate) use super::wtf8::ends_with;
7 pub(crate) use super::wtf8::starts_with;
8
9 if_nightly! {
10 use std::os::windows::ffi::OsStrExt;
11 }
12
13 if_not_nightly! {
14 pub(crate) use crate::util::is_continuation;
15
16 use super::wtf8;
17 use super::wtf8::CodePoints;
18 use super::Result;
19 }
20
21 if_not_nightly! {
22 pub(crate) fn validate_bytes(string: &[u8]) -> Result<()> {
23 wtf8::encode_wide(string).try_for_each(|x| x.map(drop))
24 }
25 }
26
27 #[cfg_attr(not(feature = "nightly"), allow(deprecated))]
encode_wide( string: &RawOsStr, ) -> impl '_ + Iterator<Item = u16>28 pub(crate) fn encode_wide(
29 string: &RawOsStr,
30 ) -> impl '_ + Iterator<Item = u16> {
31 if_nightly_return! {
32 {
33 string.as_os_str().encode_wide()
34 }
35 wtf8::encode_wide(string.as_raw_bytes()).map(|x| expect_encoded!(x))
36 }
37 }
38
39 if_not_nightly! {
40 pub(crate) fn decode_code_point(string: &[u8]) -> u32 {
41 let mut code_points = CodePoints::new(string.iter().copied());
42 let code_point = expect_encoded!(code_points
43 .next()
44 .expect("cannot parse code point from empty string"));
45 assert_eq!(None, code_points.next(), "multiple code points found");
46 code_point
47 }
48 }
49
debug(string: &RawOsStr, f: &mut Formatter<'_>) -> fmt::Result50 pub(crate) fn debug(string: &RawOsStr, f: &mut Formatter<'_>) -> fmt::Result {
51 for wchar in encode_wide(string) {
52 write!(f, "\\u{{{:X}}}", wchar)?;
53 }
54 Ok(())
55 }
56
57 #[cfg(feature = "uniquote")]
58 pub(crate) mod uniquote {
59 use uniquote::Formatter;
60 use uniquote::Result;
61
62 use crate::RawOsStr;
63
escape(string: &RawOsStr, f: &mut Formatter<'_>) -> Result64 pub(crate) fn escape(string: &RawOsStr, f: &mut Formatter<'_>) -> Result {
65 f.escape_utf16(super::encode_wide(string))
66 }
67 }
68