Add UnicodeFuncs with safe-to-implement traits

harfbuzz/src/buffer.rs

@@ -10,6 +10,8 @@
 use std;
 use sys;
 
+use crate::UnicodeFuncs;
+
 use {Direction, Language};
 
 /// A series of Unicode characters.
@@ -120,6 +122,13 @@ impl Buffer {
         b
     }
 
+    /// Sets a [`UnicodeFuncs`] instance to use with this buffer.
+    ///
+    /// Note: `unicode_funcs` is reference counted by HarfBuzz.
+    pub fn set_unicode_funcs(&mut self, unicode_funcs: &UnicodeFuncs) {
+        unsafe { sys::hb_buffer_set_unicode_funcs(self.raw, unicode_funcs.as_ptr()) }
+    }
+
     /// Add UTF-8 encoded text to the buffer.
     pub fn add_str(&mut self, text: &str) {
         unsafe {

harfbuzz/src/lib.rs

@@ -20,6 +20,14 @@
 
 pub extern crate harfbuzz_sys as sys;
 
+/// An error type for this crate
+#[derive(Debug)]
+pub enum HarfBuzzError {
+    /// Allocation failed within HarfBuzz itself
+    Alloc,
+}
+pub use HarfBuzzError as Error;
+
 mod buffer;
 pub use self::buffer::Buffer;
 
@@ -31,3 +39,13 @@ pub use self::language::Language;
 
 mod blob;
 pub use self::blob::Blob;
+
+mod unicode_funcs;
+pub use self::unicode_funcs::CombiningClassFunc;
+pub use self::unicode_funcs::ComposeFunc;
+pub use self::unicode_funcs::DecomposeFunc;
+pub use self::unicode_funcs::GeneralCategoryFunc;
+pub use self::unicode_funcs::MirroringFunc;
+pub use self::unicode_funcs::ScriptFunc;
+pub use self::unicode_funcs::UnicodeFuncs;
+pub use self::unicode_funcs::UnicodeFuncsBuilder;