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67 lines
1.8 KiB
67 lines
1.8 KiB
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pub fn array_to_utf8<const X: usize>(array: [u8; X]) -> Result<String, std::string::FromUtf8Error> {
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String::from_utf8(array.to_vec())
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.map(|mut s| {
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if let Some(index) = s.find('\u{0}') {
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s.truncate(index);
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}
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s
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})
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}
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pub fn array_to_utf16(array: &[u8]) -> String {
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unsafe {
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let (_, data, _) = array.align_to();
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String::from_utf16_lossy(data).trim_matches(char::from(0)).into()
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}
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}
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pub fn utf8_to_array<const N: usize>(s: impl Into<String>) -> [u8; N] {
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let mut array = [0u8; N];
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let s = s.into();
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let bytes = s.as_bytes();
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array[..bytes.len()].clone_from_slice(bytes);
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array
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}
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pub fn utf8_to_utf16_array<const N: usize>(s: impl Into<String>) -> [u16; N] {
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let mut array = [0u16; N];
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let bytes = s.into().encode_utf16().collect::<Vec<_>>();
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array[..bytes.len()].clone_from_slice(&bytes);
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array
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}
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pub fn vec_to_array<T: Default + Copy, const N: usize>(vec: Vec<T>) -> [T; N] {
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let mut result: [T; N] = [T::default(); N];
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for (i, v) in vec.into_iter().enumerate() {
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result[i] = v
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}
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result
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}
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#[cfg(test)]
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mod test {
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use super::*;
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#[test]
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fn test_utf8_to_array() {
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let s = "asdf".to_owned();
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let a = utf8_to_array(s);
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let mut e = [0u8; 8];
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e[..4].clone_from_slice(b"asdf");
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assert!(a == e);
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}
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#[test]
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fn test_utf8_to_utf16_array() {
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let utf16 = utf8_to_utf16_array("asdf");
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assert!(utf16 == [97, 115, 100, 102, 0,0,0,0,0,0,0,0,0,0,0,0])
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}
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#[test]
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fn test_utf8_to_utf16_array_unicode() {
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let utf16 = utf8_to_utf16_array("あいうえお");
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assert!(utf16 == [0x3042 , 0x3044, 0x3046, 0x3048, 0x304A, 0,0,0,0,0,0,0,0,0,0,0])
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}
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}
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