Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 209 insertions, 0 deletions

diff --git a/vendor/unicode-security/src/mixed_script.rs b/vendor/unicode-security/src/mixed_script.rs
new file mode 100644
index 000000000..bffc10280
--- /dev/null
+++ b/vendor/unicode-security/src/mixed_script.rs
@@ -0,0 +1,209 @@
+//! [Mixed-script detection](https://www.unicode.org/reports/tr39/#Mixed_Script_Detection)
+
+use core::fmt::{self, Debug};
+use unicode_script::{Script, ScriptExtension};
+
+/// An Augmented script set, as defined by UTS 39
+///
+/// https://www.unicode.org/reports/tr39/#def-augmented-script-set
+#[derive(Copy, Clone, PartialEq, Hash, Eq)]
+pub struct AugmentedScriptSet {
+    /// The base ScriptExtension value
+    pub base: ScriptExtension,
+    /// Han With Bopomofo
+    pub hanb: bool,
+    /// Japanese
+    pub jpan: bool,
+    /// Korean
+    pub kore: bool,
+}
+
+impl From<ScriptExtension> for AugmentedScriptSet {
+    fn from(ext: ScriptExtension) -> Self {
+        let mut hanb = false;
+        let mut jpan = false;
+        let mut kore = false;
+
+        if ext.is_common() || ext.is_inherited() || ext.contains_script(Script::Han) {
+            hanb = true;
+            jpan = true;
+            kore = true;
+        } else {
+            if ext.contains_script(Script::Hiragana) || ext.contains_script(Script::Katakana) {
+                jpan = true;
+            }
+
+            if ext.contains_script(Script::Hangul) {
+                kore = true;
+            }
+
+            if ext.contains_script(Script::Bopomofo) {
+                hanb = true;
+            }
+        }
+        Self {
+            base: ext,
+            hanb,
+            jpan,
+            kore,
+        }
+    }
+}
+
+impl From<char> for AugmentedScriptSet {
+    fn from(c: char) -> Self {
+        AugmentedScriptSet::for_char(c)
+    }
+}
+
+impl From<&'_ str> for AugmentedScriptSet {
+    fn from(s: &'_ str) -> Self {
+        AugmentedScriptSet::for_str(s)
+    }
+}
+
+impl Default for AugmentedScriptSet {
+    fn default() -> Self {
+        AugmentedScriptSet {
+            base: Script::Common.into(),
+            hanb: true,
+            jpan: true,
+            kore: true,
+        }
+    }
+}
+
+impl Debug for AugmentedScriptSet {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        if self.is_empty() {
+            write!(f, "AugmentedScriptSet {{∅}}")?;
+        } else if self.is_all() {
+            write!(f, "AugmentedScriptSet {{ALL}}")?;
+        } else {
+            write!(f, "AugmentedScriptSet {{")?;
+            let mut first_entry = true;
+            let hanb = if self.hanb { Some("Hanb") } else { None };
+            let jpan = if self.jpan { Some("Jpan") } else { None };
+            let kore = if self.kore { Some("Kore") } else { None };
+            for writing_system in None
+                .into_iter()
+                .chain(hanb)
+                .chain(jpan)
+                .chain(kore)
+                .chain(self.base.iter().map(Script::short_name))
+            {
+                if !first_entry {
+                    write!(f, ", ")?;
+                } else {
+                    first_entry = false;
+                }
+                write!(f, "{}", writing_system)?;
+            }
+            write!(f, "}}")?;
+        }
+        Ok(())
+    }
+}
+
+impl fmt::Display for AugmentedScriptSet {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        if self.is_empty() {
+            write!(f, "Empty")?;
+        } else if self.is_all() {
+            write!(f, "All")?;
+        } else {
+            let mut first_entry = true;
+            let hanb = if self.hanb {
+                Some("Han with Bopomofo")
+            } else {
+                None
+            };
+            let jpan = if self.jpan { Some("Japanese") } else { None };
+            let kore = if self.kore { Some("Korean") } else { None };
+            for writing_system in None
+                .into_iter()
+                .chain(hanb)
+                .chain(jpan)
+                .chain(kore)
+                .chain(self.base.iter().map(Script::full_name))
+            {
+                if !first_entry {
+                    write!(f, ", ")?;
+                } else {
+                    first_entry = false;
+                }
+                write!(f, "{}", writing_system)?;
+            }
+        }
+        Ok(())
+    }
+}
+
+impl AugmentedScriptSet {
+    /// Intersect this set with another
+    pub fn intersect_with(&mut self, other: Self) {
+        self.base.intersect_with(other.base);
+        self.hanb = self.hanb && other.hanb;
+        self.jpan = self.jpan && other.jpan;
+        self.kore = self.kore && other.kore;
+    }
+
+    /// Check if the set is empty
+    pub fn is_empty(&self) -> bool {
+        self.base.is_empty() && !self.hanb && !self.jpan && !self.kore
+    }
+
+    /// Check if the set is "All" (Common or Inherited)
+    pub fn is_all(&self) -> bool {
+        self.base.is_common() || self.base.is_inherited()
+    }
+
+    /// Construct an AugmentedScriptSet for a given character
+    pub fn for_char(c: char) -> Self {
+        ScriptExtension::from(c).into()
+    }
+
+    /// Find the [resolved script set](https://www.unicode.org/reports/tr39/#def-resolved-script-set) of a given string
+    pub fn for_str(s: &str) -> Self {
+        let mut set = AugmentedScriptSet::default();
+        for ch in s.chars() {
+            set.intersect_with(ch.into())
+        }
+        set
+    }
+}
+
+/// Extension trait for [mixed-script detection](https://www.unicode.org/reports/tr39/#Mixed_Script_Detection)
+pub trait MixedScript {
+    /// Check if a string is [single-script](https://www.unicode.org/reports/tr39/#def-single-script)
+    ///
+    /// Note that a single-script string may still contain multiple Script properties!
+    fn is_single_script(self) -> bool;
+
+    /// Find the [resolved script set](https://www.unicode.org/reports/tr39/#def-resolved-script-set) of a given string
+    fn resolve_script_set(self) -> AugmentedScriptSet;
+}
+
+impl MixedScript for &'_ str {
+    fn is_single_script(self) -> bool {
+        !AugmentedScriptSet::for_str(self).is_empty()
+    }
+
+    fn resolve_script_set(self) -> AugmentedScriptSet {
+        self.into()
+    }
+}
+
+/// Check if a character is considered potential mixed script confusable.
+///
+/// If the specified character is not restricted from use for identifiers,
+/// this function returns whether it is considered mixed script confusable
+/// with another character that is not restricted from use for identifiers.
+///
+/// If the specified character is restricted from use for identifiers,
+/// the return value is unspecified.
+pub fn is_potential_mixed_script_confusable_char(c: char) -> bool {
+    use crate::tables::potential_mixed_script_confusable::potential_mixed_script_confusable;
+
+    potential_mixed_script_confusable(c)
+}