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(), "╠══╣");
+    }
+}