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1a4d82fc JJ |
1 | // Copyright 2013-2014 The Rust Project Developers. See the COPYRIGHT |
2 | // file at the top-level directory of this distribution and at | |
3 | // http://rust-lang.org/COPYRIGHT. | |
4 | // | |
5 | // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or | |
6 | // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license | |
7 | // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your | |
8 | // option. This file may not be copied, modified, or distributed | |
9 | // except according to those terms. | |
1a4d82fc | 10 | |
54a0048b | 11 | //! Operations on ASCII strings and characters. |
1a4d82fc | 12 | |
85aaf69f | 13 | #![stable(feature = "rust1", since = "1.0.0")] |
1a4d82fc | 14 | |
85aaf69f | 15 | use mem; |
e9174d1e | 16 | use ops::Range; |
9e0c209e | 17 | use iter::FusedIterator; |
1a4d82fc | 18 | |
c34b1796 | 19 | /// Extension methods for ASCII-subset only operations on string slices. |
7453a54e SL |
20 | /// |
21 | /// Be aware that operations on seemingly non-ASCII characters can sometimes | |
22 | /// have unexpected results. Consider this example: | |
23 | /// | |
24 | /// ``` | |
25 | /// use std::ascii::AsciiExt; | |
26 | /// | |
27 | /// assert_eq!("café".to_ascii_uppercase(), "CAFÉ"); | |
28 | /// assert_eq!("café".to_ascii_uppercase(), "CAFé"); | |
29 | /// ``` | |
30 | /// | |
31 | /// In the first example, the lowercased string is represented `"cafe\u{301}"` | |
32 | /// (the last character is an acute accent [combining character]). Unlike the | |
33 | /// other characters in the string, the combining character will not get mapped | |
34 | /// to an uppercase variant, resulting in `"CAFE\u{301}"`. In the second | |
35 | /// example, the lowercased string is represented `"caf\u{e9}"` (the last | |
36 | /// character is a single Unicode character representing an 'e' with an acute | |
37 | /// accent). Since the last character is defined outside the scope of ASCII, | |
38 | /// it will not get mapped to an uppercase variant, resulting in `"CAF\u{e9}"`. | |
39 | /// | |
40 | /// [combining character]: https://en.wikipedia.org/wiki/Combining_character | |
85aaf69f SL |
41 | #[stable(feature = "rust1", since = "1.0.0")] |
42 | pub trait AsciiExt { | |
c34b1796 | 43 | /// Container type for copied ASCII characters. |
85aaf69f SL |
44 | #[stable(feature = "rust1", since = "1.0.0")] |
45 | type Owned; | |
46 | ||
7453a54e | 47 | /// Checks if the value is within the ASCII range. |
c34b1796 AL |
48 | /// |
49 | /// # Examples | |
50 | /// | |
51 | /// ``` | |
52 | /// use std::ascii::AsciiExt; | |
53 | /// | |
54 | /// let ascii = 'a'; | |
55 | /// let utf8 = '❤'; | |
56 | /// | |
7453a54e SL |
57 | /// assert!(ascii.is_ascii()); |
58 | /// assert!(!utf8.is_ascii()); | |
c34b1796 | 59 | /// ``` |
85aaf69f | 60 | #[stable(feature = "rust1", since = "1.0.0")] |
1a4d82fc JJ |
61 | fn is_ascii(&self) -> bool; |
62 | ||
c34b1796 AL |
63 | /// Makes a copy of the string in ASCII upper case. |
64 | /// | |
1a4d82fc JJ |
65 | /// ASCII letters 'a' to 'z' are mapped to 'A' to 'Z', |
66 | /// but non-ASCII letters are unchanged. | |
c34b1796 AL |
67 | /// |
68 | /// # Examples | |
69 | /// | |
70 | /// ``` | |
71 | /// use std::ascii::AsciiExt; | |
72 | /// | |
73 | /// let ascii = 'a'; | |
74 | /// let utf8 = '❤'; | |
75 | /// | |
76 | /// assert_eq!('A', ascii.to_ascii_uppercase()); | |
77 | /// assert_eq!('❤', utf8.to_ascii_uppercase()); | |
78 | /// ``` | |
85aaf69f SL |
79 | #[stable(feature = "rust1", since = "1.0.0")] |
80 | fn to_ascii_uppercase(&self) -> Self::Owned; | |
1a4d82fc | 81 | |
c34b1796 AL |
82 | /// Makes a copy of the string in ASCII lower case. |
83 | /// | |
1a4d82fc JJ |
84 | /// ASCII letters 'A' to 'Z' are mapped to 'a' to 'z', |
85 | /// but non-ASCII letters are unchanged. | |
c34b1796 AL |
86 | /// |
87 | /// # Examples | |
88 | /// | |
89 | /// ``` | |
90 | /// use std::ascii::AsciiExt; | |
91 | /// | |
92 | /// let ascii = 'A'; | |
93 | /// let utf8 = '❤'; | |
94 | /// | |
95 | /// assert_eq!('a', ascii.to_ascii_lowercase()); | |
96 | /// assert_eq!('❤', utf8.to_ascii_lowercase()); | |
97 | /// ``` | |
85aaf69f SL |
98 | #[stable(feature = "rust1", since = "1.0.0")] |
99 | fn to_ascii_lowercase(&self) -> Self::Owned; | |
1a4d82fc | 100 | |
9346a6ac | 101 | /// Checks that two strings are an ASCII case-insensitive match. |
c34b1796 | 102 | /// |
1a4d82fc JJ |
103 | /// Same as `to_ascii_lowercase(a) == to_ascii_lowercase(b)`, |
104 | /// but without allocating and copying temporary strings. | |
c34b1796 AL |
105 | /// |
106 | /// # Examples | |
107 | /// | |
108 | /// ``` | |
109 | /// use std::ascii::AsciiExt; | |
110 | /// | |
111 | /// let ascii1 = 'A'; | |
112 | /// let ascii2 = 'a'; | |
113 | /// let ascii3 = 'A'; | |
114 | /// let ascii4 = 'z'; | |
115 | /// | |
7453a54e SL |
116 | /// assert!(ascii1.eq_ignore_ascii_case(&ascii2)); |
117 | /// assert!(ascii1.eq_ignore_ascii_case(&ascii3)); | |
118 | /// assert!(!ascii1.eq_ignore_ascii_case(&ascii4)); | |
c34b1796 | 119 | /// ``` |
85aaf69f | 120 | #[stable(feature = "rust1", since = "1.0.0")] |
1a4d82fc | 121 | fn eq_ignore_ascii_case(&self, other: &Self) -> bool; |
85aaf69f | 122 | |
9346a6ac | 123 | /// Converts this type to its ASCII upper case equivalent in-place. |
85aaf69f SL |
124 | /// |
125 | /// See `to_ascii_uppercase` for more information. | |
c34b1796 AL |
126 | /// |
127 | /// # Examples | |
128 | /// | |
129 | /// ``` | |
c34b1796 AL |
130 | /// use std::ascii::AsciiExt; |
131 | /// | |
132 | /// let mut ascii = 'a'; | |
133 | /// | |
134 | /// ascii.make_ascii_uppercase(); | |
135 | /// | |
136 | /// assert_eq!('A', ascii); | |
137 | /// ``` | |
54a0048b | 138 | #[stable(feature = "ascii", since = "1.9.0")] |
85aaf69f SL |
139 | fn make_ascii_uppercase(&mut self); |
140 | ||
9346a6ac | 141 | /// Converts this type to its ASCII lower case equivalent in-place. |
85aaf69f SL |
142 | /// |
143 | /// See `to_ascii_lowercase` for more information. | |
c34b1796 AL |
144 | /// |
145 | /// # Examples | |
146 | /// | |
147 | /// ``` | |
c34b1796 AL |
148 | /// use std::ascii::AsciiExt; |
149 | /// | |
150 | /// let mut ascii = 'A'; | |
151 | /// | |
152 | /// ascii.make_ascii_lowercase(); | |
153 | /// | |
154 | /// assert_eq!('a', ascii); | |
155 | /// ``` | |
54a0048b | 156 | #[stable(feature = "ascii", since = "1.9.0")] |
85aaf69f | 157 | fn make_ascii_lowercase(&mut self); |
1a4d82fc JJ |
158 | } |
159 | ||
85aaf69f SL |
160 | #[stable(feature = "rust1", since = "1.0.0")] |
161 | impl AsciiExt for str { | |
162 | type Owned = String; | |
163 | ||
1a4d82fc JJ |
164 | #[inline] |
165 | fn is_ascii(&self) -> bool { | |
166 | self.bytes().all(|b| b.is_ascii()) | |
167 | } | |
168 | ||
169 | #[inline] | |
170 | fn to_ascii_uppercase(&self) -> String { | |
e9174d1e SL |
171 | let mut bytes = self.as_bytes().to_vec(); |
172 | bytes.make_ascii_uppercase(); | |
173 | // make_ascii_uppercase() preserves the UTF-8 invariant. | |
174 | unsafe { String::from_utf8_unchecked(bytes) } | |
1a4d82fc JJ |
175 | } |
176 | ||
177 | #[inline] | |
178 | fn to_ascii_lowercase(&self) -> String { | |
e9174d1e SL |
179 | let mut bytes = self.as_bytes().to_vec(); |
180 | bytes.make_ascii_lowercase(); | |
181 | // make_ascii_uppercase() preserves the UTF-8 invariant. | |
182 | unsafe { String::from_utf8_unchecked(bytes) } | |
1a4d82fc JJ |
183 | } |
184 | ||
185 | #[inline] | |
186 | fn eq_ignore_ascii_case(&self, other: &str) -> bool { | |
187 | self.as_bytes().eq_ignore_ascii_case(other.as_bytes()) | |
188 | } | |
85aaf69f SL |
189 | |
190 | fn make_ascii_uppercase(&mut self) { | |
191 | let me: &mut [u8] = unsafe { mem::transmute(self) }; | |
192 | me.make_ascii_uppercase() | |
193 | } | |
194 | ||
195 | fn make_ascii_lowercase(&mut self) { | |
196 | let me: &mut [u8] = unsafe { mem::transmute(self) }; | |
197 | me.make_ascii_lowercase() | |
198 | } | |
1a4d82fc JJ |
199 | } |
200 | ||
85aaf69f SL |
201 | #[stable(feature = "rust1", since = "1.0.0")] |
202 | impl AsciiExt for [u8] { | |
203 | type Owned = Vec<u8>; | |
1a4d82fc JJ |
204 | #[inline] |
205 | fn is_ascii(&self) -> bool { | |
206 | self.iter().all(|b| b.is_ascii()) | |
207 | } | |
208 | ||
209 | #[inline] | |
210 | fn to_ascii_uppercase(&self) -> Vec<u8> { | |
e9174d1e SL |
211 | let mut me = self.to_vec(); |
212 | me.make_ascii_uppercase(); | |
213 | return me | |
1a4d82fc JJ |
214 | } |
215 | ||
216 | #[inline] | |
217 | fn to_ascii_lowercase(&self) -> Vec<u8> { | |
e9174d1e SL |
218 | let mut me = self.to_vec(); |
219 | me.make_ascii_lowercase(); | |
220 | return me | |
1a4d82fc JJ |
221 | } |
222 | ||
223 | #[inline] | |
224 | fn eq_ignore_ascii_case(&self, other: &[u8]) -> bool { | |
225 | self.len() == other.len() && | |
62682a34 | 226 | self.iter().zip(other).all(|(a, b)| { |
1a4d82fc JJ |
227 | a.eq_ignore_ascii_case(b) |
228 | }) | |
229 | } | |
85aaf69f SL |
230 | |
231 | fn make_ascii_uppercase(&mut self) { | |
232 | for byte in self { | |
233 | byte.make_ascii_uppercase(); | |
234 | } | |
235 | } | |
236 | ||
237 | fn make_ascii_lowercase(&mut self) { | |
238 | for byte in self { | |
239 | byte.make_ascii_lowercase(); | |
240 | } | |
241 | } | |
1a4d82fc JJ |
242 | } |
243 | ||
85aaf69f | 244 | #[stable(feature = "rust1", since = "1.0.0")] |
1a4d82fc | 245 | impl AsciiExt for u8 { |
85aaf69f | 246 | type Owned = u8; |
1a4d82fc | 247 | #[inline] |
c34b1796 | 248 | fn is_ascii(&self) -> bool { *self & 128 == 0 } |
1a4d82fc | 249 | #[inline] |
85aaf69f | 250 | fn to_ascii_uppercase(&self) -> u8 { ASCII_UPPERCASE_MAP[*self as usize] } |
1a4d82fc | 251 | #[inline] |
85aaf69f | 252 | fn to_ascii_lowercase(&self) -> u8 { ASCII_LOWERCASE_MAP[*self as usize] } |
1a4d82fc JJ |
253 | #[inline] |
254 | fn eq_ignore_ascii_case(&self, other: &u8) -> bool { | |
255 | self.to_ascii_lowercase() == other.to_ascii_lowercase() | |
256 | } | |
85aaf69f SL |
257 | #[inline] |
258 | fn make_ascii_uppercase(&mut self) { *self = self.to_ascii_uppercase(); } | |
259 | #[inline] | |
260 | fn make_ascii_lowercase(&mut self) { *self = self.to_ascii_lowercase(); } | |
1a4d82fc JJ |
261 | } |
262 | ||
85aaf69f | 263 | #[stable(feature = "rust1", since = "1.0.0")] |
1a4d82fc | 264 | impl AsciiExt for char { |
85aaf69f | 265 | type Owned = char; |
1a4d82fc JJ |
266 | #[inline] |
267 | fn is_ascii(&self) -> bool { | |
268 | *self as u32 <= 0x7F | |
269 | } | |
270 | ||
271 | #[inline] | |
272 | fn to_ascii_uppercase(&self) -> char { | |
273 | if self.is_ascii() { | |
274 | (*self as u8).to_ascii_uppercase() as char | |
275 | } else { | |
276 | *self | |
277 | } | |
278 | } | |
279 | ||
280 | #[inline] | |
281 | fn to_ascii_lowercase(&self) -> char { | |
282 | if self.is_ascii() { | |
283 | (*self as u8).to_ascii_lowercase() as char | |
284 | } else { | |
285 | *self | |
286 | } | |
287 | } | |
288 | ||
289 | #[inline] | |
290 | fn eq_ignore_ascii_case(&self, other: &char) -> bool { | |
291 | self.to_ascii_lowercase() == other.to_ascii_lowercase() | |
292 | } | |
85aaf69f SL |
293 | |
294 | #[inline] | |
295 | fn make_ascii_uppercase(&mut self) { *self = self.to_ascii_uppercase(); } | |
296 | #[inline] | |
297 | fn make_ascii_lowercase(&mut self) { *self = self.to_ascii_lowercase(); } | |
298 | } | |
299 | ||
300 | /// An iterator over the escaped version of a byte, constructed via | |
301 | /// `std::ascii::escape_default`. | |
302 | #[stable(feature = "rust1", since = "1.0.0")] | |
303 | pub struct EscapeDefault { | |
304 | range: Range<usize>, | |
305 | data: [u8; 4], | |
1a4d82fc JJ |
306 | } |
307 | ||
c34b1796 | 308 | /// Returns an iterator that produces an escaped version of a `u8`. |
1a4d82fc JJ |
309 | /// |
310 | /// The default is chosen with a bias toward producing literals that are | |
311 | /// legal in a variety of languages, including C++11 and similar C-family | |
312 | /// languages. The exact rules are: | |
313 | /// | |
314 | /// - Tab, CR and LF are escaped as '\t', '\r' and '\n' respectively. | |
315 | /// - Single-quote, double-quote and backslash chars are backslash-escaped. | |
316 | /// - Any other chars in the range [0x20,0x7e] are not escaped. | |
85aaf69f | 317 | /// - Any other chars are given hex escapes of the form '\xNN'. |
1a4d82fc | 318 | /// - Unicode escapes are never generated by this function. |
c34b1796 AL |
319 | /// |
320 | /// # Examples | |
321 | /// | |
322 | /// ``` | |
323 | /// use std::ascii; | |
324 | /// | |
325 | /// let escaped = ascii::escape_default(b'0').next().unwrap(); | |
326 | /// assert_eq!(b'0', escaped); | |
327 | /// | |
328 | /// let mut escaped = ascii::escape_default(b'\t'); | |
329 | /// | |
330 | /// assert_eq!(b'\\', escaped.next().unwrap()); | |
331 | /// assert_eq!(b't', escaped.next().unwrap()); | |
332 | /// ``` | |
85aaf69f SL |
333 | #[stable(feature = "rust1", since = "1.0.0")] |
334 | pub fn escape_default(c: u8) -> EscapeDefault { | |
335 | let (data, len) = match c { | |
336 | b'\t' => ([b'\\', b't', 0, 0], 2), | |
337 | b'\r' => ([b'\\', b'r', 0, 0], 2), | |
338 | b'\n' => ([b'\\', b'n', 0, 0], 2), | |
339 | b'\\' => ([b'\\', b'\\', 0, 0], 2), | |
340 | b'\'' => ([b'\\', b'\'', 0, 0], 2), | |
341 | b'"' => ([b'\\', b'"', 0, 0], 2), | |
342 | b'\x20' ... b'\x7e' => ([c, 0, 0, 0], 1), | |
343 | _ => ([b'\\', b'x', hexify(c >> 4), hexify(c & 0xf)], 4), | |
344 | }; | |
345 | ||
c34b1796 | 346 | return EscapeDefault { range: (0.. len), data: data }; |
85aaf69f SL |
347 | |
348 | fn hexify(b: u8) -> u8 { | |
349 | match b { | |
350 | 0 ... 9 => b'0' + b, | |
351 | _ => b'a' + b - 10, | |
1a4d82fc JJ |
352 | } |
353 | } | |
354 | } | |
355 | ||
85aaf69f SL |
356 | #[stable(feature = "rust1", since = "1.0.0")] |
357 | impl Iterator for EscapeDefault { | |
358 | type Item = u8; | |
359 | fn next(&mut self) -> Option<u8> { self.range.next().map(|i| self.data[i]) } | |
360 | fn size_hint(&self) -> (usize, Option<usize>) { self.range.size_hint() } | |
361 | } | |
362 | #[stable(feature = "rust1", since = "1.0.0")] | |
363 | impl DoubleEndedIterator for EscapeDefault { | |
364 | fn next_back(&mut self) -> Option<u8> { | |
365 | self.range.next_back().map(|i| self.data[i]) | |
366 | } | |
367 | } | |
368 | #[stable(feature = "rust1", since = "1.0.0")] | |
369 | impl ExactSizeIterator for EscapeDefault {} | |
9e0c209e SL |
370 | #[unstable(feature = "fused", issue = "35602")] |
371 | impl FusedIterator for EscapeDefault {} | |
372 | ||
85aaf69f | 373 | |
1a4d82fc JJ |
374 | static ASCII_LOWERCASE_MAP: [u8; 256] = [ |
375 | 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, | |
376 | 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, | |
377 | 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, | |
378 | 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, | |
379 | b' ', b'!', b'"', b'#', b'$', b'%', b'&', b'\'', | |
380 | b'(', b')', b'*', b'+', b',', b'-', b'.', b'/', | |
381 | b'0', b'1', b'2', b'3', b'4', b'5', b'6', b'7', | |
382 | b'8', b'9', b':', b';', b'<', b'=', b'>', b'?', | |
383 | b'@', | |
384 | ||
385 | b'a', b'b', b'c', b'd', b'e', b'f', b'g', | |
386 | b'h', b'i', b'j', b'k', b'l', b'm', b'n', b'o', | |
387 | b'p', b'q', b'r', b's', b't', b'u', b'v', b'w', | |
388 | b'x', b'y', b'z', | |
389 | ||
390 | b'[', b'\\', b']', b'^', b'_', | |
391 | b'`', b'a', b'b', b'c', b'd', b'e', b'f', b'g', | |
392 | b'h', b'i', b'j', b'k', b'l', b'm', b'n', b'o', | |
393 | b'p', b'q', b'r', b's', b't', b'u', b'v', b'w', | |
394 | b'x', b'y', b'z', b'{', b'|', b'}', b'~', 0x7f, | |
395 | 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, | |
396 | 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, | |
397 | 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, | |
398 | 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, | |
399 | 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, | |
400 | 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, | |
401 | 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, | |
402 | 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, | |
403 | 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, | |
404 | 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, | |
405 | 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, | |
406 | 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, | |
407 | 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, | |
408 | 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, | |
409 | 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, | |
410 | 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, | |
411 | ]; | |
412 | ||
413 | static ASCII_UPPERCASE_MAP: [u8; 256] = [ | |
414 | 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, | |
415 | 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, | |
416 | 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, | |
417 | 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, | |
418 | b' ', b'!', b'"', b'#', b'$', b'%', b'&', b'\'', | |
419 | b'(', b')', b'*', b'+', b',', b'-', b'.', b'/', | |
420 | b'0', b'1', b'2', b'3', b'4', b'5', b'6', b'7', | |
421 | b'8', b'9', b':', b';', b'<', b'=', b'>', b'?', | |
422 | b'@', b'A', b'B', b'C', b'D', b'E', b'F', b'G', | |
423 | b'H', b'I', b'J', b'K', b'L', b'M', b'N', b'O', | |
424 | b'P', b'Q', b'R', b'S', b'T', b'U', b'V', b'W', | |
425 | b'X', b'Y', b'Z', b'[', b'\\', b']', b'^', b'_', | |
426 | b'`', | |
427 | ||
428 | b'A', b'B', b'C', b'D', b'E', b'F', b'G', | |
429 | b'H', b'I', b'J', b'K', b'L', b'M', b'N', b'O', | |
430 | b'P', b'Q', b'R', b'S', b'T', b'U', b'V', b'W', | |
431 | b'X', b'Y', b'Z', | |
432 | ||
433 | b'{', b'|', b'}', b'~', 0x7f, | |
434 | 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, | |
435 | 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, | |
436 | 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, | |
437 | 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, | |
438 | 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, | |
439 | 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, | |
440 | 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, | |
441 | 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, | |
442 | 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, | |
443 | 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, | |
444 | 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, | |
445 | 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, | |
446 | 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, | |
447 | 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, | |
448 | 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, | |
449 | 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, | |
450 | ]; | |
451 | ||
452 | ||
453 | #[cfg(test)] | |
454 | mod tests { | |
1a4d82fc JJ |
455 | use super::*; |
456 | use char::from_u32; | |
457 | ||
458 | #[test] | |
c1a9b12d SL |
459 | fn test_is_ascii() { |
460 | assert!(b"".is_ascii()); | |
461 | assert!(b"banana\0\x7F".is_ascii()); | |
462 | assert!(b"banana\0\x7F".iter().all(|b| b.is_ascii())); | |
463 | assert!(!b"Vi\xe1\xbb\x87t Nam".is_ascii()); | |
464 | assert!(!b"Vi\xe1\xbb\x87t Nam".iter().all(|b| b.is_ascii())); | |
465 | assert!(!b"\xe1\xbb\x87".iter().any(|b| b.is_ascii())); | |
1a4d82fc | 466 | |
1a4d82fc | 467 | assert!("".is_ascii()); |
c1a9b12d SL |
468 | assert!("banana\0\u{7F}".is_ascii()); |
469 | assert!("banana\0\u{7F}".chars().all(|c| c.is_ascii())); | |
470 | assert!(!"ประเทศไทย中华Việt Nam".chars().all(|c| c.is_ascii())); | |
471 | assert!(!"ประเทศไทย中华ệ ".chars().any(|c| c.is_ascii())); | |
1a4d82fc JJ |
472 | } |
473 | ||
474 | #[test] | |
475 | fn test_to_ascii_uppercase() { | |
476 | assert_eq!("url()URL()uRl()ürl".to_ascii_uppercase(), "URL()URL()URL()üRL"); | |
477 | assert_eq!("hıKß".to_ascii_uppercase(), "HıKß"); | |
478 | ||
c34b1796 | 479 | for i in 0..501 { |
1a4d82fc JJ |
480 | let upper = if 'a' as u32 <= i && i <= 'z' as u32 { i + 'A' as u32 - 'a' as u32 } |
481 | else { i }; | |
482 | assert_eq!((from_u32(i).unwrap()).to_string().to_ascii_uppercase(), | |
483 | (from_u32(upper).unwrap()).to_string()); | |
1a4d82fc JJ |
484 | } |
485 | } | |
486 | ||
487 | #[test] | |
488 | fn test_to_ascii_lowercase() { | |
489 | assert_eq!("url()URL()uRl()Ürl".to_ascii_lowercase(), "url()url()url()Ürl"); | |
490 | // Dotted capital I, Kelvin sign, Sharp S. | |
491 | assert_eq!("HİKß".to_ascii_lowercase(), "hİKß"); | |
492 | ||
c34b1796 | 493 | for i in 0..501 { |
1a4d82fc JJ |
494 | let lower = if 'A' as u32 <= i && i <= 'Z' as u32 { i + 'a' as u32 - 'A' as u32 } |
495 | else { i }; | |
496 | assert_eq!((from_u32(i).unwrap()).to_string().to_ascii_lowercase(), | |
497 | (from_u32(lower).unwrap()).to_string()); | |
1a4d82fc JJ |
498 | } |
499 | } | |
500 | ||
c1a9b12d SL |
501 | #[test] |
502 | fn test_make_ascii_lower_case() { | |
503 | macro_rules! test { | |
504 | ($from: expr, $to: expr) => { | |
505 | { | |
506 | let mut x = $from; | |
507 | x.make_ascii_lowercase(); | |
508 | assert_eq!(x, $to); | |
509 | } | |
510 | } | |
511 | } | |
512 | test!(b'A', b'a'); | |
513 | test!(b'a', b'a'); | |
514 | test!(b'!', b'!'); | |
515 | test!('A', 'a'); | |
516 | test!('À', 'À'); | |
517 | test!('a', 'a'); | |
518 | test!('!', '!'); | |
519 | test!(b"H\xc3\x89".to_vec(), b"h\xc3\x89"); | |
520 | test!("HİKß".to_string(), "hİKß"); | |
521 | } | |
522 | ||
523 | ||
524 | #[test] | |
525 | fn test_make_ascii_upper_case() { | |
526 | macro_rules! test { | |
527 | ($from: expr, $to: expr) => { | |
528 | { | |
529 | let mut x = $from; | |
530 | x.make_ascii_uppercase(); | |
531 | assert_eq!(x, $to); | |
532 | } | |
533 | } | |
534 | } | |
535 | test!(b'a', b'A'); | |
536 | test!(b'A', b'A'); | |
537 | test!(b'!', b'!'); | |
538 | test!('a', 'A'); | |
539 | test!('à', 'à'); | |
540 | test!('A', 'A'); | |
541 | test!('!', '!'); | |
542 | test!(b"h\xc3\xa9".to_vec(), b"H\xc3\xa9"); | |
543 | test!("hıKß".to_string(), "HıKß"); | |
544 | ||
545 | let mut x = "Hello".to_string(); | |
546 | x[..3].make_ascii_uppercase(); // Test IndexMut on String. | |
547 | assert_eq!(x, "HELlo") | |
548 | } | |
549 | ||
1a4d82fc JJ |
550 | #[test] |
551 | fn test_eq_ignore_ascii_case() { | |
552 | assert!("url()URL()uRl()Ürl".eq_ignore_ascii_case("url()url()url()Ürl")); | |
553 | assert!(!"Ürl".eq_ignore_ascii_case("ürl")); | |
554 | // Dotted capital I, Kelvin sign, Sharp S. | |
555 | assert!("HİKß".eq_ignore_ascii_case("hİKß")); | |
556 | assert!(!"İ".eq_ignore_ascii_case("i")); | |
557 | assert!(!"K".eq_ignore_ascii_case("k")); | |
558 | assert!(!"ß".eq_ignore_ascii_case("s")); | |
559 | ||
c34b1796 | 560 | for i in 0..501 { |
85aaf69f SL |
561 | let lower = if 'A' as u32 <= i && i <= 'Z' as u32 { i + 'a' as u32 - 'A' as u32 } |
562 | else { i }; | |
1a4d82fc | 563 | assert!((from_u32(i).unwrap()).to_string().eq_ignore_ascii_case( |
85aaf69f | 564 | &from_u32(lower).unwrap().to_string())); |
1a4d82fc JJ |
565 | } |
566 | } | |
54a0048b SL |
567 | |
568 | #[test] | |
569 | fn inference_works() { | |
570 | let x = "a".to_string(); | |
571 | x.eq_ignore_ascii_case("A"); | |
572 | } | |
1a4d82fc | 573 | } |