1 files changed, 82 insertions, 0 deletions
diff --git a/intl/icu_capi/src/iana_bcp47_mapper.rs b/intl/icu_capi/src/iana_bcp47_mapper.rs
new file mode 100644
index 0000000000..c77730410d
--- /dev/null
+++ b/intl/icu_capi/src/iana_bcp47_mapper.rs
@@ -0,0 +1,82 @@
+// This file is part of ICU4X. For terms of use, please see the file
+// called LICENSE at the top level of the ICU4X source tree
+// (online at: https://github.com/unicode-org/icu4x/blob/main/LICENSE ).
+
+#[diplomat::bridge]
+pub mod ffi {
+    use crate::errors::ffi::ICU4XError;
+    use crate::provider::ffi::ICU4XDataProvider;
+    use alloc::boxed::Box;
+    use icu_timezone::IanaBcp47RoundTripMapper;
+    use icu_timezone::IanaToBcp47Mapper;
+    use icu_timezone::TimeZoneBcp47Id;
+
+    /// An object capable of mapping from an IANA time zone ID to a BCP-47 ID.
+    ///
+    /// This can be used via `try_set_iana_time_zone_id()` on [`ICU4XCustomTimeZone`].
+    ///
+    /// [`ICU4XCustomTimeZone`]: crate::timezone::ffi::ICU4XCustomTimeZone
+    #[diplomat::opaque]
+    #[diplomat::rust_link(icu::timezone::IanaToBcp47Mapper, Struct)]
+    #[diplomat::rust_link(icu::timezone::IanaToBcp47Mapper::as_borrowed, FnInStruct, hidden)]
+    pub struct ICU4XIanaToBcp47Mapper(pub IanaToBcp47Mapper);
+
+    impl ICU4XIanaToBcp47Mapper {
+        #[diplomat::rust_link(icu::timezone::IanaToBcp47Mapper::new, FnInStruct)]
+        pub fn create(
+            provider: &ICU4XDataProvider,
+        ) -> Result<Box<ICU4XIanaToBcp47Mapper>, ICU4XError> {
+            Ok(Box::new(ICU4XIanaToBcp47Mapper(call_constructor!(
+                IanaToBcp47Mapper::new [r => Ok(r)],
+                IanaToBcp47Mapper::try_new_with_any_provider,
+                IanaToBcp47Mapper::try_new_with_buffer_provider,
+                provider,
+            )?)))
+        }
+    }
+
+    /// An object capable of mapping from a BCP-47 time zone ID to an IANA ID.
+    #[diplomat::opaque]
+    #[diplomat::rust_link(icu::timezone::IanaBcp47RoundTripMapper, Struct)]
+    #[diplomat::rust_link(
+        icu::timezone::IanaBcp47RoundTripMapper::as_borrowed,
+        FnInStruct,
+        hidden
+    )]
+    pub struct ICU4XBcp47ToIanaMapper(pub IanaBcp47RoundTripMapper);
+
+    impl ICU4XBcp47ToIanaMapper {
+        #[diplomat::rust_link(icu::timezone::IanaBcp47RoundTripMapper::new, FnInStruct)]
+        pub fn create(
+            provider: &ICU4XDataProvider,
+        ) -> Result<Box<ICU4XBcp47ToIanaMapper>, ICU4XError> {
+            Ok(Box::new(ICU4XBcp47ToIanaMapper(call_constructor!(
+                IanaBcp47RoundTripMapper::new [r => Ok(r)],
+                IanaBcp47RoundTripMapper::try_new_with_any_provider,
+                IanaBcp47RoundTripMapper::try_new_with_buffer_provider,
+                provider,
+            )?)))
+        }
+
+        /// Writes out the canonical IANA time zone ID corresponding to the given BCP-47 ID.
+        #[diplomat::rust_link(
+            icu::datetime::time_zone::IanaBcp47RoundTripMapper::bcp47_to_iana,
+            FnInStruct
+        )]
+        pub fn get(
+            &self,
+            value: &str,
+            write: &mut diplomat_runtime::DiplomatWriteable,
+        ) -> Result<(), ICU4XError> {
+            use core::str::FromStr;
+            use writeable::Writeable;
+            let handle = self.0.as_borrowed();
+            TimeZoneBcp47Id::from_str(value)
+                .ok()
+                .and_then(|bcp47_id| handle.bcp47_to_iana(bcp47_id))
+                .ok_or(ICU4XError::TimeZoneInvalidIdError)?
+                .write_to(write)?;
+            Ok(())
+        }
+    }
+}