intl/icu_capi/src/iana_bcp47_mapper.rs

   1 // This file is part of ICU4X. For terms of use, please see the file
   2 // called LICENSE at the top level of the ICU4X source tree
   3 // (online at: https://github.com/unicode-org/icu4x/blob/main/LICENSE ).
   4
   5 #[diplomat::bridge]
   6 pub mod ffi {
   7     use crate::errors::ffi::ICU4XError;
   8     use crate::provider::ffi::ICU4XDataProvider;
   9     use alloc::boxed::Box;
  10     use icu_timezone::IanaBcp47RoundTripMapper;
  11     use icu_timezone::IanaToBcp47Mapper;
  12     use icu_timezone::TimeZoneBcp47Id;
  13
  14     /// An object capable of mapping from an IANA time zone ID to a BCP-47 ID.
  15     ///
  16     /// This can be used via `try_set_iana_time_zone_id()` on [`ICU4XCustomTimeZone`].
  17     ///
  18     /// [`ICU4XCustomTimeZone`]: crate::timezone::ffi::ICU4XCustomTimeZone
  19     #[diplomat::opaque]
  20     #[diplomat::rust_link(icu::timezone::IanaToBcp47Mapper, Struct)]
  21     #[diplomat::rust_link(icu::timezone::IanaToBcp47Mapper::as_borrowed, FnInStruct, hidden)]
  22     pub struct ICU4XIanaToBcp47Mapper(pub IanaToBcp47Mapper);
  23
  24     impl ICU4XIanaToBcp47Mapper {
  25         #[diplomat::rust_link(icu::timezone::IanaToBcp47Mapper::new, FnInStruct)]
  26         pub fn create(
  27             provider: &ICU4XDataProvider,
  28         ) -> Result<Box<ICU4XIanaToBcp47Mapper>, ICU4XError> {
  29             Ok(Box::new(ICU4XIanaToBcp47Mapper(call_constructor!(
  30                 IanaToBcp47Mapper::new [r => Ok(r)],
  31                 IanaToBcp47Mapper::try_new_with_any_provider,
  32                 IanaToBcp47Mapper::try_new_with_buffer_provider,
  33                 provider,
  34             )?)))
  35         }
  36     }
  37
  38     /// An object capable of mapping from a BCP-47 time zone ID to an IANA ID.
  39     #[diplomat::opaque]
  40     #[diplomat::rust_link(icu::timezone::IanaBcp47RoundTripMapper, Struct)]
  41     #[diplomat::rust_link(
  42         icu::timezone::IanaBcp47RoundTripMapper::as_borrowed,
  43         FnInStruct,
  44         hidden
  45     )]
  46     pub struct ICU4XBcp47ToIanaMapper(pub IanaBcp47RoundTripMapper);
  47
  48     impl ICU4XBcp47ToIanaMapper {
  49         #[diplomat::rust_link(icu::timezone::IanaBcp47RoundTripMapper::new, FnInStruct)]
  50         pub fn create(
  51             provider: &ICU4XDataProvider,
  52         ) -> Result<Box<ICU4XBcp47ToIanaMapper>, ICU4XError> {
  53             Ok(Box::new(ICU4XBcp47ToIanaMapper(call_constructor!(
  54                 IanaBcp47RoundTripMapper::new [r => Ok(r)],
  55                 IanaBcp47RoundTripMapper::try_new_with_any_provider,
  56                 IanaBcp47RoundTripMapper::try_new_with_buffer_provider,
  57                 provider,
  58             )?)))
  59         }
  60
  61         /// Writes out the canonical IANA time zone ID corresponding to the given BCP-47 ID.
  62         #[diplomat::rust_link(
  63             icu::datetime::time_zone::IanaBcp47RoundTripMapper::bcp47_to_iana,
  64             FnInStruct
  65         )]
  66         pub fn get(
  67             &self,
  68             value: &str,
  69             write: &mut diplomat_runtime::DiplomatWriteable,
  70         ) -> Result<(), ICU4XError> {
  71             use core::str::FromStr;
  72             use writeable::Writeable;
  73             let handle = self.0.as_borrowed();
  74             TimeZoneBcp47Id::from_str(value)
  75                 .ok()
  76                 .and_then(|bcp47_id| handle.bcp47_to_iana(bcp47_id))
  77                 .ok_or(ICU4XError::TimeZoneInvalidIdError)?
  78                 .write_to(write)?;
  79             Ok(())
  80         }
  81     }
  82 }