use crate::std::string::String;
#[cfg(test)]
use crate::std::vec;
use crate::std::vec::Vec;
pub(crate) fn utf8_to_latin1(s: &str) -> Option<Vec<u8>> {
let mut out = Vec::with_capacity(s.len());
for ch in s.chars() {
let latin1_ch = match ch {
ch @ '\x00'..='~' => ch as u8,
'\u{00a0}' => 160,
'¡' => 161,
'¢' => 162,
'£' => 163,
'¤' => 164,
'¥' => 165,
'¦' => 166,
'§' => 167,
'¨' => 168,
'©' => 169,
'ª' => 170,
'«' => 171,
'¬' => 172,
'\u{00AD}' => 173,
'®' => 174,
'¯' => 175,
'°' => 176,
'±' => 177,
'²' => 178,
'³' => 179,
'´' => 180,
'µ' => 181,
'¶' => 182,
'·' => 183,
'¸' => 184,
'¹' => 185,
'º' => 186,
'»' => 187,
'¼' => 188,
'½' => 189,
'¾' => 190,
'¿' => 191,
'À' => 192,
'Á' => 193,
'Â' => 194,
'Ã' => 195,
'Ä' => 196,
'Å' => 197,
'Æ' => 198,
'Ç' => 199,
'È' => 200,
'É' => 201,
'Ê' => 202,
'Ë' => 203,
'Ì' => 204,
'Í' => 205,
'Î' => 206,
'Ï' => 207,
'Ð' => 208,
'Ñ' => 209,
'Ò' => 210,
'Ó' => 211,
'Ô' => 212,
'Õ' => 213,
'Ö' => 214,
'×' => 215,
'Ø' => 216,
'Ù' => 217,
'Ú' => 218,
'Û' => 219,
'Ü' => 220,
'Ý' => 221,
'Þ' => 222,
'ß' => 223,
'à' => 224,
'á' => 225,
'â' => 226,
'ã' => 227,
'ä' => 228,
'å' => 229,
'æ' => 230,
'ç' => 231,
'è' => 232,
'é' => 233,
'ê' => 234,
'ë' => 235,
'ì' => 236,
'í' => 237,
'î' => 238,
'ï' => 239,
'ð' => 240,
'ñ' => 241,
'ò' => 242,
'ó' => 243,
'ô' => 244,
'õ' => 245,
'ö' => 246,
'÷' => 247,
'ø' => 248,
'ù' => 249,
'ú' => 250,
'û' => 251,
'ü' => 252,
'ý' => 253,
'þ' => 254,
'ÿ' => 255,
_ => return None,
};
out.push(latin1_ch);
}
Some(out)
}
pub(crate) fn latin1_to_utf8(latin1: &[u8]) -> Option<String> {
let mut out = String::with_capacity(latin1.len());
for ch in latin1.iter().copied() {
let utf_ch = match ch {
ch @ b'\x00'..=b'~' => ch as char,
160 => '\u{00a0}',
161 => '¡',
162 => '¢',
163 => '£',
164 => '¤',
165 => '¥',
166 => '¦',
167 => '§',
168 => '¨',
169 => '©',
170 => 'ª',
171 => '«',
172 => '¬',
173 => '\u{00AD}',
174 => '®',
175 => '¯',
176 => '°',
177 => '±',
178 => '²',
179 => '³',
180 => '´',
181 => 'µ',
182 => '¶',
183 => '·',
184 => '¸',
185 => '¹',
186 => 'º',
187 => '»',
188 => '¼',
189 => '½',
190 => '¾',
191 => '¿',
192 => 'À',
193 => 'Á',
194 => 'Â',
195 => 'Ã',
196 => 'Ä',
197 => 'Å',
198 => 'Æ',
199 => 'Ç',
200 => 'È',
201 => 'É',
202 => 'Ê',
203 => 'Ë',
204 => 'Ì',
205 => 'Í',
206 => 'Î',
207 => 'Ï',
208 => 'Ð',
209 => 'Ñ',
210 => 'Ò',
211 => 'Ó',
212 => 'Ô',
213 => 'Õ',
214 => 'Ö',
215 => '×',
216 => 'Ø',
217 => 'Ù',
218 => 'Ú',
219 => 'Û',
220 => 'Ü',
221 => 'Ý',
222 => 'Þ',
223 => 'ß',
224 => 'à',
225 => 'á',
226 => 'â',
227 => 'ã',
228 => 'ä',
229 => 'å',
230 => 'æ',
231 => 'ç',
232 => 'è',
233 => 'é',
234 => 'ê',
235 => 'ë',
236 => 'ì',
237 => 'í',
238 => 'î',
239 => 'ï',
240 => 'ð',
241 => 'ñ',
242 => 'ò',
243 => 'ó',
244 => 'ô',
245 => 'õ',
246 => 'ö',
247 => '÷',
248 => 'ø',
249 => 'ù',
250 => 'ú',
251 => 'û',
252 => 'ü',
253 => 'ý',
254 => 'þ',
255 => 'ÿ',
_ => return None,
};
out.push(utf_ch);
}
Some(out)
}
#[test]
fn test_latin1_consistency() {
for x in 0..=255 {
if let Some(utf8) = latin1_to_utf8(&[x]) {
assert_eq!(utf8_to_latin1(&utf8), Some(vec![x]));
}
}
}
