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-rw-r--r--third_party/rust/zip/src/cp437.rs204
1 files changed, 204 insertions, 0 deletions
diff --git a/third_party/rust/zip/src/cp437.rs b/third_party/rust/zip/src/cp437.rs
new file mode 100644
index 0000000000..4dba9af12f
--- /dev/null
+++ b/third_party/rust/zip/src/cp437.rs
@@ -0,0 +1,204 @@
+//! Convert a string in IBM codepage 437 to UTF-8
+
+/// Trait to convert IBM codepage 437 to the target type
+pub trait FromCp437 {
+ /// Target type
+ type Target;
+
+ /// Function that does the conversion from cp437.
+ /// Generally allocations will be avoided if all data falls into the ASCII range.
+ #[allow(clippy::wrong_self_convention)]
+ fn from_cp437(self) -> Self::Target;
+}
+
+impl<'a> FromCp437 for &'a [u8] {
+ type Target = ::std::borrow::Cow<'a, str>;
+
+ fn from_cp437(self) -> Self::Target {
+ if self.iter().all(|c| *c < 0x80) {
+ ::std::str::from_utf8(self).unwrap().into()
+ } else {
+ self.iter().map(|c| to_char(*c)).collect::<String>().into()
+ }
+ }
+}
+
+impl FromCp437 for Vec<u8> {
+ type Target = String;
+
+ fn from_cp437(self) -> Self::Target {
+ if self.iter().all(|c| *c < 0x80) {
+ String::from_utf8(self).unwrap()
+ } else {
+ self.into_iter().map(to_char).collect()
+ }
+ }
+}
+
+fn to_char(input: u8) -> char {
+ let output = match input {
+ 0x00..=0x7f => input as u32,
+ 0x80 => 0x00c7,
+ 0x81 => 0x00fc,
+ 0x82 => 0x00e9,
+ 0x83 => 0x00e2,
+ 0x84 => 0x00e4,
+ 0x85 => 0x00e0,
+ 0x86 => 0x00e5,
+ 0x87 => 0x00e7,
+ 0x88 => 0x00ea,
+ 0x89 => 0x00eb,
+ 0x8a => 0x00e8,
+ 0x8b => 0x00ef,
+ 0x8c => 0x00ee,
+ 0x8d => 0x00ec,
+ 0x8e => 0x00c4,
+ 0x8f => 0x00c5,
+ 0x90 => 0x00c9,
+ 0x91 => 0x00e6,
+ 0x92 => 0x00c6,
+ 0x93 => 0x00f4,
+ 0x94 => 0x00f6,
+ 0x95 => 0x00f2,
+ 0x96 => 0x00fb,
+ 0x97 => 0x00f9,
+ 0x98 => 0x00ff,
+ 0x99 => 0x00d6,
+ 0x9a => 0x00dc,
+ 0x9b => 0x00a2,
+ 0x9c => 0x00a3,
+ 0x9d => 0x00a5,
+ 0x9e => 0x20a7,
+ 0x9f => 0x0192,
+ 0xa0 => 0x00e1,
+ 0xa1 => 0x00ed,
+ 0xa2 => 0x00f3,
+ 0xa3 => 0x00fa,
+ 0xa4 => 0x00f1,
+ 0xa5 => 0x00d1,
+ 0xa6 => 0x00aa,
+ 0xa7 => 0x00ba,
+ 0xa8 => 0x00bf,
+ 0xa9 => 0x2310,
+ 0xaa => 0x00ac,
+ 0xab => 0x00bd,
+ 0xac => 0x00bc,
+ 0xad => 0x00a1,
+ 0xae => 0x00ab,
+ 0xaf => 0x00bb,
+ 0xb0 => 0x2591,
+ 0xb1 => 0x2592,
+ 0xb2 => 0x2593,
+ 0xb3 => 0x2502,
+ 0xb4 => 0x2524,
+ 0xb5 => 0x2561,
+ 0xb6 => 0x2562,
+ 0xb7 => 0x2556,
+ 0xb8 => 0x2555,
+ 0xb9 => 0x2563,
+ 0xba => 0x2551,
+ 0xbb => 0x2557,
+ 0xbc => 0x255d,
+ 0xbd => 0x255c,
+ 0xbe => 0x255b,
+ 0xbf => 0x2510,
+ 0xc0 => 0x2514,
+ 0xc1 => 0x2534,
+ 0xc2 => 0x252c,
+ 0xc3 => 0x251c,
+ 0xc4 => 0x2500,
+ 0xc5 => 0x253c,
+ 0xc6 => 0x255e,
+ 0xc7 => 0x255f,
+ 0xc8 => 0x255a,
+ 0xc9 => 0x2554,
+ 0xca => 0x2569,
+ 0xcb => 0x2566,
+ 0xcc => 0x2560,
+ 0xcd => 0x2550,
+ 0xce => 0x256c,
+ 0xcf => 0x2567,
+ 0xd0 => 0x2568,
+ 0xd1 => 0x2564,
+ 0xd2 => 0x2565,
+ 0xd3 => 0x2559,
+ 0xd4 => 0x2558,
+ 0xd5 => 0x2552,
+ 0xd6 => 0x2553,
+ 0xd7 => 0x256b,
+ 0xd8 => 0x256a,
+ 0xd9 => 0x2518,
+ 0xda => 0x250c,
+ 0xdb => 0x2588,
+ 0xdc => 0x2584,
+ 0xdd => 0x258c,
+ 0xde => 0x2590,
+ 0xdf => 0x2580,
+ 0xe0 => 0x03b1,
+ 0xe1 => 0x00df,
+ 0xe2 => 0x0393,
+ 0xe3 => 0x03c0,
+ 0xe4 => 0x03a3,
+ 0xe5 => 0x03c3,
+ 0xe6 => 0x00b5,
+ 0xe7 => 0x03c4,
+ 0xe8 => 0x03a6,
+ 0xe9 => 0x0398,
+ 0xea => 0x03a9,
+ 0xeb => 0x03b4,
+ 0xec => 0x221e,
+ 0xed => 0x03c6,
+ 0xee => 0x03b5,
+ 0xef => 0x2229,
+ 0xf0 => 0x2261,
+ 0xf1 => 0x00b1,
+ 0xf2 => 0x2265,
+ 0xf3 => 0x2264,
+ 0xf4 => 0x2320,
+ 0xf5 => 0x2321,
+ 0xf6 => 0x00f7,
+ 0xf7 => 0x2248,
+ 0xf8 => 0x00b0,
+ 0xf9 => 0x2219,
+ 0xfa => 0x00b7,
+ 0xfb => 0x221a,
+ 0xfc => 0x207f,
+ 0xfd => 0x00b2,
+ 0xfe => 0x25a0,
+ 0xff => 0x00a0,
+ };
+ ::std::char::from_u32(output).unwrap()
+}
+
+#[cfg(test)]
+mod test {
+ #[test]
+ fn to_char_valid() {
+ for i in 0x00_u32..0x100 {
+ super::to_char(i as u8);
+ }
+ }
+
+ #[test]
+ fn ascii() {
+ for i in 0x00..0x80 {
+ assert_eq!(super::to_char(i), i as char);
+ }
+ }
+
+ #[test]
+ fn example_slice() {
+ use super::FromCp437;
+ let data = b"Cura\x87ao";
+ assert!(::std::str::from_utf8(data).is_err());
+ assert_eq!(data.from_cp437(), "Curaçao");
+ }
+
+ #[test]
+ fn example_vec() {
+ use super::FromCp437;
+ let data = vec![0xCC, 0xCD, 0xCD, 0xB9];
+ assert!(String::from_utf8(data.clone()).is_err());
+ assert_eq!(&data.from_cp437(), "╠══╣");
+ }
+}