WIP: Add ICU bindings for stringprep, idna2008 and spoof checker.

icu/src/spoof.rs

@@ -0,0 +1,52 @@
+//! Crate wrapping what we need from ICU’s C API for JIDs.
+//!
+//! See http://site.icu-project.org/
+
+use crate::bindings::{
+    icu_spoof_get_skeleton, icu_spoof_open, icu_spoof_set_checks, UErrorCode, USpoofChecker,
+    U_ZERO_ERROR,
+};
+use crate::error::Error;
+
+/// TODO: spoof checker.
+pub struct SpoofChecker {
+    inner: *mut USpoofChecker,
+}
+
+impl SpoofChecker {
+    /// Create a new SpoofChecker.
+    pub fn new(checks: i32) -> Result<SpoofChecker, UErrorCode> {
+        let mut err: UErrorCode = U_ZERO_ERROR;
+        let inner = unsafe { icu_spoof_open(&mut err) };
+        if err != U_ZERO_ERROR {
+            return Err(err);
+        }
+        unsafe { icu_spoof_set_checks(inner, checks, &mut err) };
+        if err != U_ZERO_ERROR {
+            return Err(err);
+        }
+        Ok(SpoofChecker { inner })
+    }
+
+    /// Transform a string into a skeleton for matching it with other potentially similar strings.
+    pub fn get_skeleton(&self, input: &str) -> Result<String, Error> {
+        let mut err: UErrorCode = U_ZERO_ERROR;
+        let mut dest: Vec<u8> = vec![0u8; 256];
+        let len = unsafe {
+            icu_spoof_get_skeleton(
+                self.inner,
+                0,
+                input.as_ptr(),
+                input.len() as i32,
+                dest.as_mut_ptr(),
+                dest.len() as i32,
+                &mut err,
+            )
+        };
+        if err != U_ZERO_ERROR {
+            return Err(Error::from_icu_code(err));
+        }
+        dest.truncate(len as usize);
+        Ok(String::from_utf8(dest)?)
+    }
+}