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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 SL |
15 | use prelude::v1::*; |
16 | ||
17 | use mem; | |
e9174d1e | 18 | use ops::Range; |
1a4d82fc | 19 | |
c34b1796 | 20 | /// Extension methods for ASCII-subset only operations on string slices. |
7453a54e SL |
21 | /// |
22 | /// Be aware that operations on seemingly non-ASCII characters can sometimes | |
23 | /// have unexpected results. Consider this example: | |
24 | /// | |
25 | /// ``` | |
26 | /// use std::ascii::AsciiExt; | |
27 | /// | |
28 | /// assert_eq!("café".to_ascii_uppercase(), "CAFÉ"); | |
29 | /// assert_eq!("café".to_ascii_uppercase(), "CAFé"); | |
30 | /// ``` | |
31 | /// | |
32 | /// In the first example, the lowercased string is represented `"cafe\u{301}"` | |
33 | /// (the last character is an acute accent [combining character]). Unlike the | |
34 | /// other characters in the string, the combining character will not get mapped | |
35 | /// to an uppercase variant, resulting in `"CAFE\u{301}"`. In the second | |
36 | /// example, the lowercased string is represented `"caf\u{e9}"` (the last | |
37 | /// character is a single Unicode character representing an 'e' with an acute | |
38 | /// accent). Since the last character is defined outside the scope of ASCII, | |
39 | /// it will not get mapped to an uppercase variant, resulting in `"CAF\u{e9}"`. | |
40 | /// | |
41 | /// [combining character]: https://en.wikipedia.org/wiki/Combining_character | |
85aaf69f SL |
42 | #[stable(feature = "rust1", since = "1.0.0")] |
43 | pub trait AsciiExt { | |
c34b1796 | 44 | /// Container type for copied ASCII characters. |
85aaf69f SL |
45 | #[stable(feature = "rust1", since = "1.0.0")] |
46 | type Owned; | |
47 | ||
7453a54e | 48 | /// Checks if the value is within the ASCII range. |
c34b1796 AL |
49 | /// |
50 | /// # Examples | |
51 | /// | |
52 | /// ``` | |
53 | /// use std::ascii::AsciiExt; | |
54 | /// | |
55 | /// let ascii = 'a'; | |
56 | /// let utf8 = '❤'; | |
57 | /// | |
7453a54e SL |
58 | /// assert!(ascii.is_ascii()); |
59 | /// assert!(!utf8.is_ascii()); | |
c34b1796 | 60 | /// ``` |
85aaf69f | 61 | #[stable(feature = "rust1", since = "1.0.0")] |
1a4d82fc JJ |
62 | fn is_ascii(&self) -> bool; |
63 | ||
c34b1796 AL |
64 | /// Makes a copy of the string in ASCII upper case. |
65 | /// | |
1a4d82fc JJ |
66 | /// ASCII letters 'a' to 'z' are mapped to 'A' to 'Z', |
67 | /// but non-ASCII letters are unchanged. | |
c34b1796 AL |
68 | /// |
69 | /// # Examples | |
70 | /// | |
71 | /// ``` | |
72 | /// use std::ascii::AsciiExt; | |
73 | /// | |
74 | /// let ascii = 'a'; | |
75 | /// let utf8 = '❤'; | |
76 | /// | |
77 | /// assert_eq!('A', ascii.to_ascii_uppercase()); | |
78 | /// assert_eq!('❤', utf8.to_ascii_uppercase()); | |
79 | /// ``` | |
85aaf69f SL |
80 | #[stable(feature = "rust1", since = "1.0.0")] |
81 | fn to_ascii_uppercase(&self) -> Self::Owned; | |
1a4d82fc | 82 | |
c34b1796 AL |
83 | /// Makes a copy of the string in ASCII lower case. |
84 | /// | |
1a4d82fc JJ |
85 | /// ASCII letters 'A' to 'Z' are mapped to 'a' to 'z', |
86 | /// but non-ASCII letters are unchanged. | |
c34b1796 AL |
87 | /// |
88 | /// # Examples | |
89 | /// | |
90 | /// ``` | |
91 | /// use std::ascii::AsciiExt; | |
92 | /// | |
93 | /// let ascii = 'A'; | |
94 | /// let utf8 = '❤'; | |
95 | /// | |
96 | /// assert_eq!('a', ascii.to_ascii_lowercase()); | |
97 | /// assert_eq!('❤', utf8.to_ascii_lowercase()); | |
98 | /// ``` | |
85aaf69f SL |
99 | #[stable(feature = "rust1", since = "1.0.0")] |
100 | fn to_ascii_lowercase(&self) -> Self::Owned; | |
1a4d82fc | 101 | |
9346a6ac | 102 | /// Checks that two strings are an ASCII case-insensitive match. |
c34b1796 | 103 | /// |
1a4d82fc JJ |
104 | /// Same as `to_ascii_lowercase(a) == to_ascii_lowercase(b)`, |
105 | /// but without allocating and copying temporary strings. | |
c34b1796 AL |
106 | /// |
107 | /// # Examples | |
108 | /// | |
109 | /// ``` | |
110 | /// use std::ascii::AsciiExt; | |
111 | /// | |
112 | /// let ascii1 = 'A'; | |
113 | /// let ascii2 = 'a'; | |
114 | /// let ascii3 = 'A'; | |
115 | /// let ascii4 = 'z'; | |
116 | /// | |
7453a54e SL |
117 | /// assert!(ascii1.eq_ignore_ascii_case(&ascii2)); |
118 | /// assert!(ascii1.eq_ignore_ascii_case(&ascii3)); | |
119 | /// assert!(!ascii1.eq_ignore_ascii_case(&ascii4)); | |
c34b1796 | 120 | /// ``` |
85aaf69f | 121 | #[stable(feature = "rust1", since = "1.0.0")] |
1a4d82fc | 122 | fn eq_ignore_ascii_case(&self, other: &Self) -> bool; |
85aaf69f | 123 | |
9346a6ac | 124 | /// Converts this type to its ASCII upper case equivalent in-place. |
85aaf69f SL |
125 | /// |
126 | /// See `to_ascii_uppercase` for more information. | |
c34b1796 AL |
127 | /// |
128 | /// # Examples | |
129 | /// | |
130 | /// ``` | |
c34b1796 AL |
131 | /// use std::ascii::AsciiExt; |
132 | /// | |
133 | /// let mut ascii = 'a'; | |
134 | /// | |
135 | /// ascii.make_ascii_uppercase(); | |
136 | /// | |
137 | /// assert_eq!('A', ascii); | |
138 | /// ``` | |
54a0048b | 139 | #[stable(feature = "ascii", since = "1.9.0")] |
85aaf69f SL |
140 | fn make_ascii_uppercase(&mut self); |
141 | ||
9346a6ac | 142 | /// Converts this type to its ASCII lower case equivalent in-place. |
85aaf69f SL |
143 | /// |
144 | /// See `to_ascii_lowercase` for more information. | |
c34b1796 AL |
145 | /// |
146 | /// # Examples | |
147 | /// | |
148 | /// ``` | |
c34b1796 AL |
149 | /// use std::ascii::AsciiExt; |
150 | /// | |
151 | /// let mut ascii = 'A'; | |
152 | /// | |
153 | /// ascii.make_ascii_lowercase(); | |
154 | /// | |
155 | /// assert_eq!('a', ascii); | |
156 | /// ``` | |
54a0048b | 157 | #[stable(feature = "ascii", since = "1.9.0")] |
85aaf69f | 158 | fn make_ascii_lowercase(&mut self); |
1a4d82fc JJ |
159 | } |
160 | ||
85aaf69f SL |
161 | #[stable(feature = "rust1", since = "1.0.0")] |
162 | impl AsciiExt for str { | |
163 | type Owned = String; | |
164 | ||
1a4d82fc JJ |
165 | #[inline] |
166 | fn is_ascii(&self) -> bool { | |
167 | self.bytes().all(|b| b.is_ascii()) | |
168 | } | |
169 | ||
170 | #[inline] | |
171 | fn to_ascii_uppercase(&self) -> String { | |
e9174d1e SL |
172 | let mut bytes = self.as_bytes().to_vec(); |
173 | bytes.make_ascii_uppercase(); | |
174 | // make_ascii_uppercase() preserves the UTF-8 invariant. | |
175 | unsafe { String::from_utf8_unchecked(bytes) } | |
1a4d82fc JJ |
176 | } |
177 | ||
178 | #[inline] | |
179 | fn to_ascii_lowercase(&self) -> String { | |
e9174d1e SL |
180 | let mut bytes = self.as_bytes().to_vec(); |
181 | bytes.make_ascii_lowercase(); | |
182 | // make_ascii_uppercase() preserves the UTF-8 invariant. | |
183 | unsafe { String::from_utf8_unchecked(bytes) } | |
1a4d82fc JJ |
184 | } |
185 | ||
186 | #[inline] | |
187 | fn eq_ignore_ascii_case(&self, other: &str) -> bool { | |
188 | self.as_bytes().eq_ignore_ascii_case(other.as_bytes()) | |
189 | } | |
85aaf69f SL |
190 | |
191 | fn make_ascii_uppercase(&mut self) { | |
192 | let me: &mut [u8] = unsafe { mem::transmute(self) }; | |
193 | me.make_ascii_uppercase() | |
194 | } | |
195 | ||
196 | fn make_ascii_lowercase(&mut self) { | |
197 | let me: &mut [u8] = unsafe { mem::transmute(self) }; | |
198 | me.make_ascii_lowercase() | |
199 | } | |
1a4d82fc JJ |
200 | } |
201 | ||
85aaf69f SL |
202 | #[stable(feature = "rust1", since = "1.0.0")] |
203 | impl AsciiExt for [u8] { | |
204 | type Owned = Vec<u8>; | |
1a4d82fc JJ |
205 | #[inline] |
206 | fn is_ascii(&self) -> bool { | |
207 | self.iter().all(|b| b.is_ascii()) | |
208 | } | |
209 | ||
210 | #[inline] | |
211 | fn to_ascii_uppercase(&self) -> Vec<u8> { | |
e9174d1e SL |
212 | let mut me = self.to_vec(); |
213 | me.make_ascii_uppercase(); | |
214 | return me | |
1a4d82fc JJ |
215 | } |
216 | ||
217 | #[inline] | |
218 | fn to_ascii_lowercase(&self) -> Vec<u8> { | |
e9174d1e SL |
219 | let mut me = self.to_vec(); |
220 | me.make_ascii_lowercase(); | |
221 | return me | |
1a4d82fc JJ |
222 | } |
223 | ||
224 | #[inline] | |
225 | fn eq_ignore_ascii_case(&self, other: &[u8]) -> bool { | |
226 | self.len() == other.len() && | |
62682a34 | 227 | self.iter().zip(other).all(|(a, b)| { |
1a4d82fc JJ |
228 | a.eq_ignore_ascii_case(b) |
229 | }) | |
230 | } | |
85aaf69f SL |
231 | |
232 | fn make_ascii_uppercase(&mut self) { | |
233 | for byte in self { | |
234 | byte.make_ascii_uppercase(); | |
235 | } | |
236 | } | |
237 | ||
238 | fn make_ascii_lowercase(&mut self) { | |
239 | for byte in self { | |
240 | byte.make_ascii_lowercase(); | |
241 | } | |
242 | } | |
1a4d82fc JJ |
243 | } |
244 | ||
85aaf69f | 245 | #[stable(feature = "rust1", since = "1.0.0")] |
1a4d82fc | 246 | impl AsciiExt for u8 { |
85aaf69f | 247 | type Owned = u8; |
1a4d82fc | 248 | #[inline] |
c34b1796 | 249 | fn is_ascii(&self) -> bool { *self & 128 == 0 } |
1a4d82fc | 250 | #[inline] |
85aaf69f | 251 | fn to_ascii_uppercase(&self) -> u8 { ASCII_UPPERCASE_MAP[*self as usize] } |
1a4d82fc | 252 | #[inline] |
85aaf69f | 253 | fn to_ascii_lowercase(&self) -> u8 { ASCII_LOWERCASE_MAP[*self as usize] } |
1a4d82fc JJ |
254 | #[inline] |
255 | fn eq_ignore_ascii_case(&self, other: &u8) -> bool { | |
256 | self.to_ascii_lowercase() == other.to_ascii_lowercase() | |
257 | } | |
85aaf69f SL |
258 | #[inline] |
259 | fn make_ascii_uppercase(&mut self) { *self = self.to_ascii_uppercase(); } | |
260 | #[inline] | |
261 | fn make_ascii_lowercase(&mut self) { *self = self.to_ascii_lowercase(); } | |
1a4d82fc JJ |
262 | } |
263 | ||
85aaf69f | 264 | #[stable(feature = "rust1", since = "1.0.0")] |
1a4d82fc | 265 | impl AsciiExt for char { |
85aaf69f | 266 | type Owned = char; |
1a4d82fc JJ |
267 | #[inline] |
268 | fn is_ascii(&self) -> bool { | |
269 | *self as u32 <= 0x7F | |
270 | } | |
271 | ||
272 | #[inline] | |
273 | fn to_ascii_uppercase(&self) -> char { | |
274 | if self.is_ascii() { | |
275 | (*self as u8).to_ascii_uppercase() as char | |
276 | } else { | |
277 | *self | |
278 | } | |
279 | } | |
280 | ||
281 | #[inline] | |
282 | fn to_ascii_lowercase(&self) -> char { | |
283 | if self.is_ascii() { | |
284 | (*self as u8).to_ascii_lowercase() as char | |
285 | } else { | |
286 | *self | |
287 | } | |
288 | } | |
289 | ||
290 | #[inline] | |
291 | fn eq_ignore_ascii_case(&self, other: &char) -> bool { | |
292 | self.to_ascii_lowercase() == other.to_ascii_lowercase() | |
293 | } | |
85aaf69f SL |
294 | |
295 | #[inline] | |
296 | fn make_ascii_uppercase(&mut self) { *self = self.to_ascii_uppercase(); } | |
297 | #[inline] | |
298 | fn make_ascii_lowercase(&mut self) { *self = self.to_ascii_lowercase(); } | |
299 | } | |
300 | ||
301 | /// An iterator over the escaped version of a byte, constructed via | |
302 | /// `std::ascii::escape_default`. | |
303 | #[stable(feature = "rust1", since = "1.0.0")] | |
304 | pub struct EscapeDefault { | |
305 | range: Range<usize>, | |
306 | data: [u8; 4], | |
1a4d82fc JJ |
307 | } |
308 | ||
c34b1796 | 309 | /// Returns an iterator that produces an escaped version of a `u8`. |
1a4d82fc JJ |
310 | /// |
311 | /// The default is chosen with a bias toward producing literals that are | |
312 | /// legal in a variety of languages, including C++11 and similar C-family | |
313 | /// languages. The exact rules are: | |
314 | /// | |
315 | /// - Tab, CR and LF are escaped as '\t', '\r' and '\n' respectively. | |
316 | /// - Single-quote, double-quote and backslash chars are backslash-escaped. | |
317 | /// - Any other chars in the range [0x20,0x7e] are not escaped. | |
85aaf69f | 318 | /// - Any other chars are given hex escapes of the form '\xNN'. |
1a4d82fc | 319 | /// - Unicode escapes are never generated by this function. |
c34b1796 AL |
320 | /// |
321 | /// # Examples | |
322 | /// | |
323 | /// ``` | |
324 | /// use std::ascii; | |
325 | /// | |
326 | /// let escaped = ascii::escape_default(b'0').next().unwrap(); | |
327 | /// assert_eq!(b'0', escaped); | |
328 | /// | |
329 | /// let mut escaped = ascii::escape_default(b'\t'); | |
330 | /// | |
331 | /// assert_eq!(b'\\', escaped.next().unwrap()); | |
332 | /// assert_eq!(b't', escaped.next().unwrap()); | |
333 | /// ``` | |
85aaf69f SL |
334 | #[stable(feature = "rust1", since = "1.0.0")] |
335 | pub fn escape_default(c: u8) -> EscapeDefault { | |
336 | let (data, len) = match c { | |
337 | b'\t' => ([b'\\', b't', 0, 0], 2), | |
338 | b'\r' => ([b'\\', b'r', 0, 0], 2), | |
339 | b'\n' => ([b'\\', b'n', 0, 0], 2), | |
340 | b'\\' => ([b'\\', b'\\', 0, 0], 2), | |
341 | b'\'' => ([b'\\', b'\'', 0, 0], 2), | |
342 | b'"' => ([b'\\', b'"', 0, 0], 2), | |
343 | b'\x20' ... b'\x7e' => ([c, 0, 0, 0], 1), | |
344 | _ => ([b'\\', b'x', hexify(c >> 4), hexify(c & 0xf)], 4), | |
345 | }; | |
346 | ||
c34b1796 | 347 | return EscapeDefault { range: (0.. len), data: data }; |
85aaf69f SL |
348 | |
349 | fn hexify(b: u8) -> u8 { | |
350 | match b { | |
351 | 0 ... 9 => b'0' + b, | |
352 | _ => b'a' + b - 10, | |
1a4d82fc JJ |
353 | } |
354 | } | |
355 | } | |
356 | ||
85aaf69f SL |
357 | #[stable(feature = "rust1", since = "1.0.0")] |
358 | impl Iterator for EscapeDefault { | |
359 | type Item = u8; | |
360 | fn next(&mut self) -> Option<u8> { self.range.next().map(|i| self.data[i]) } | |
361 | fn size_hint(&self) -> (usize, Option<usize>) { self.range.size_hint() } | |
362 | } | |
363 | #[stable(feature = "rust1", since = "1.0.0")] | |
364 | impl DoubleEndedIterator for EscapeDefault { | |
365 | fn next_back(&mut self) -> Option<u8> { | |
366 | self.range.next_back().map(|i| self.data[i]) | |
367 | } | |
368 | } | |
369 | #[stable(feature = "rust1", since = "1.0.0")] | |
370 | impl ExactSizeIterator for EscapeDefault {} | |
371 | ||
1a4d82fc JJ |
372 | static ASCII_LOWERCASE_MAP: [u8; 256] = [ |
373 | 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, | |
374 | 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, | |
375 | 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, | |
376 | 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, | |
377 | b' ', b'!', b'"', b'#', b'$', b'%', b'&', b'\'', | |
378 | b'(', b')', b'*', b'+', b',', b'-', b'.', b'/', | |
379 | b'0', b'1', b'2', b'3', b'4', b'5', b'6', b'7', | |
380 | b'8', b'9', b':', b';', b'<', b'=', b'>', b'?', | |
381 | b'@', | |
382 | ||
383 | b'a', b'b', b'c', b'd', b'e', b'f', b'g', | |
384 | b'h', b'i', b'j', b'k', b'l', b'm', b'n', b'o', | |
385 | b'p', b'q', b'r', b's', b't', b'u', b'v', b'w', | |
386 | b'x', b'y', b'z', | |
387 | ||
388 | b'[', b'\\', b']', b'^', b'_', | |
389 | b'`', b'a', b'b', b'c', b'd', b'e', b'f', b'g', | |
390 | b'h', b'i', b'j', b'k', b'l', b'm', b'n', b'o', | |
391 | b'p', b'q', b'r', b's', b't', b'u', b'v', b'w', | |
392 | b'x', b'y', b'z', b'{', b'|', b'}', b'~', 0x7f, | |
393 | 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, | |
394 | 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, | |
395 | 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, | |
396 | 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, | |
397 | 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, | |
398 | 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, | |
399 | 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, | |
400 | 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, | |
401 | 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, | |
402 | 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, | |
403 | 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, | |
404 | 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, | |
405 | 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, | |
406 | 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, | |
407 | 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, | |
408 | 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, | |
409 | ]; | |
410 | ||
411 | static ASCII_UPPERCASE_MAP: [u8; 256] = [ | |
412 | 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, | |
413 | 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, | |
414 | 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, | |
415 | 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, | |
416 | b' ', b'!', b'"', b'#', b'$', b'%', b'&', b'\'', | |
417 | b'(', b')', b'*', b'+', b',', b'-', b'.', b'/', | |
418 | b'0', b'1', b'2', b'3', b'4', b'5', b'6', b'7', | |
419 | b'8', b'9', b':', b';', b'<', b'=', b'>', b'?', | |
420 | b'@', b'A', b'B', b'C', b'D', b'E', b'F', b'G', | |
421 | b'H', b'I', b'J', b'K', b'L', b'M', b'N', b'O', | |
422 | b'P', b'Q', b'R', b'S', b'T', b'U', b'V', b'W', | |
423 | b'X', b'Y', b'Z', b'[', b'\\', b']', b'^', b'_', | |
424 | b'`', | |
425 | ||
426 | b'A', b'B', b'C', b'D', b'E', b'F', b'G', | |
427 | b'H', b'I', b'J', b'K', b'L', b'M', b'N', b'O', | |
428 | b'P', b'Q', b'R', b'S', b'T', b'U', b'V', b'W', | |
429 | b'X', b'Y', b'Z', | |
430 | ||
431 | b'{', b'|', b'}', b'~', 0x7f, | |
432 | 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, | |
433 | 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, | |
434 | 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, | |
435 | 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, | |
436 | 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, | |
437 | 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, | |
438 | 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, | |
439 | 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, | |
440 | 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, | |
441 | 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, | |
442 | 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, | |
443 | 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, | |
444 | 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, | |
445 | 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, | |
446 | 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, | |
447 | 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, | |
448 | ]; | |
449 | ||
450 | ||
451 | #[cfg(test)] | |
452 | mod tests { | |
453 | use prelude::v1::*; | |
454 | use super::*; | |
455 | use char::from_u32; | |
456 | ||
457 | #[test] | |
c1a9b12d SL |
458 | fn test_is_ascii() { |
459 | assert!(b"".is_ascii()); | |
460 | assert!(b"banana\0\x7F".is_ascii()); | |
461 | assert!(b"banana\0\x7F".iter().all(|b| b.is_ascii())); | |
462 | assert!(!b"Vi\xe1\xbb\x87t Nam".is_ascii()); | |
463 | assert!(!b"Vi\xe1\xbb\x87t Nam".iter().all(|b| b.is_ascii())); | |
464 | assert!(!b"\xe1\xbb\x87".iter().any(|b| b.is_ascii())); | |
1a4d82fc | 465 | |
1a4d82fc | 466 | assert!("".is_ascii()); |
c1a9b12d SL |
467 | assert!("banana\0\u{7F}".is_ascii()); |
468 | assert!("banana\0\u{7F}".chars().all(|c| c.is_ascii())); | |
469 | assert!(!"ประเทศไทย中华Việt Nam".chars().all(|c| c.is_ascii())); | |
470 | assert!(!"ประเทศไทย中华ệ ".chars().any(|c| c.is_ascii())); | |
1a4d82fc JJ |
471 | } |
472 | ||
473 | #[test] | |
474 | fn test_to_ascii_uppercase() { | |
475 | assert_eq!("url()URL()uRl()ürl".to_ascii_uppercase(), "URL()URL()URL()üRL"); | |
476 | assert_eq!("hıKß".to_ascii_uppercase(), "HıKß"); | |
477 | ||
c34b1796 | 478 | for i in 0..501 { |
1a4d82fc JJ |
479 | let upper = if 'a' as u32 <= i && i <= 'z' as u32 { i + 'A' as u32 - 'a' as u32 } |
480 | else { i }; | |
481 | assert_eq!((from_u32(i).unwrap()).to_string().to_ascii_uppercase(), | |
482 | (from_u32(upper).unwrap()).to_string()); | |
1a4d82fc JJ |
483 | } |
484 | } | |
485 | ||
486 | #[test] | |
487 | fn test_to_ascii_lowercase() { | |
488 | assert_eq!("url()URL()uRl()Ürl".to_ascii_lowercase(), "url()url()url()Ürl"); | |
489 | // Dotted capital I, Kelvin sign, Sharp S. | |
490 | assert_eq!("HİKß".to_ascii_lowercase(), "hİKß"); | |
491 | ||
c34b1796 | 492 | for i in 0..501 { |
1a4d82fc JJ |
493 | let lower = if 'A' as u32 <= i && i <= 'Z' as u32 { i + 'a' as u32 - 'A' as u32 } |
494 | else { i }; | |
495 | assert_eq!((from_u32(i).unwrap()).to_string().to_ascii_lowercase(), | |
496 | (from_u32(lower).unwrap()).to_string()); | |
1a4d82fc JJ |
497 | } |
498 | } | |
499 | ||
c1a9b12d SL |
500 | #[test] |
501 | fn test_make_ascii_lower_case() { | |
502 | macro_rules! test { | |
503 | ($from: expr, $to: expr) => { | |
504 | { | |
505 | let mut x = $from; | |
506 | x.make_ascii_lowercase(); | |
507 | assert_eq!(x, $to); | |
508 | } | |
509 | } | |
510 | } | |
511 | test!(b'A', b'a'); | |
512 | test!(b'a', b'a'); | |
513 | test!(b'!', b'!'); | |
514 | test!('A', 'a'); | |
515 | test!('À', 'À'); | |
516 | test!('a', 'a'); | |
517 | test!('!', '!'); | |
518 | test!(b"H\xc3\x89".to_vec(), b"h\xc3\x89"); | |
519 | test!("HİKß".to_string(), "hİKß"); | |
520 | } | |
521 | ||
522 | ||
523 | #[test] | |
524 | fn test_make_ascii_upper_case() { | |
525 | macro_rules! test { | |
526 | ($from: expr, $to: expr) => { | |
527 | { | |
528 | let mut x = $from; | |
529 | x.make_ascii_uppercase(); | |
530 | assert_eq!(x, $to); | |
531 | } | |
532 | } | |
533 | } | |
534 | test!(b'a', b'A'); | |
535 | test!(b'A', b'A'); | |
536 | test!(b'!', b'!'); | |
537 | test!('a', 'A'); | |
538 | test!('à', 'à'); | |
539 | test!('A', 'A'); | |
540 | test!('!', '!'); | |
541 | test!(b"h\xc3\xa9".to_vec(), b"H\xc3\xa9"); | |
542 | test!("hıKß".to_string(), "HıKß"); | |
543 | ||
544 | let mut x = "Hello".to_string(); | |
545 | x[..3].make_ascii_uppercase(); // Test IndexMut on String. | |
546 | assert_eq!(x, "HELlo") | |
547 | } | |
548 | ||
1a4d82fc JJ |
549 | #[test] |
550 | fn test_eq_ignore_ascii_case() { | |
551 | assert!("url()URL()uRl()Ürl".eq_ignore_ascii_case("url()url()url()Ürl")); | |
552 | assert!(!"Ürl".eq_ignore_ascii_case("ürl")); | |
553 | // Dotted capital I, Kelvin sign, Sharp S. | |
554 | assert!("HİKß".eq_ignore_ascii_case("hİKß")); | |
555 | assert!(!"İ".eq_ignore_ascii_case("i")); | |
556 | assert!(!"K".eq_ignore_ascii_case("k")); | |
557 | assert!(!"ß".eq_ignore_ascii_case("s")); | |
558 | ||
c34b1796 | 559 | for i in 0..501 { |
85aaf69f SL |
560 | let lower = if 'A' as u32 <= i && i <= 'Z' as u32 { i + 'a' as u32 - 'A' as u32 } |
561 | else { i }; | |
1a4d82fc | 562 | assert!((from_u32(i).unwrap()).to_string().eq_ignore_ascii_case( |
85aaf69f | 563 | &from_u32(lower).unwrap().to_string())); |
1a4d82fc JJ |
564 | } |
565 | } | |
54a0048b SL |
566 | |
567 | #[test] | |
568 | fn inference_works() { | |
569 | let x = "a".to_string(); | |
570 | x.eq_ignore_ascii_case("A"); | |
571 | } | |
1a4d82fc | 572 | } |