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//! OpenCC bindings for Rust
use std::ffi::{CStr, CString, c_void};
use std::{fs, io};
use libc::uintptr_t;
use thiserror::Error;
/// OpenCC bindings for Rust
pub struct OpenCC {
openccs: Vec<*mut c_void>,
}
impl OpenCC {
/// Create a new OpenCC instance with the given configuration
pub fn new<T>(configs: T) -> Result<OpenCC, Error>
where
T: AsRef<[Config]>,
{
let configs = configs.as_ref();
assert!(!configs.is_empty());
let mut openccs = Vec::new();
for config in configs {
let config_data = config.get_data();
let dir = tempfile::tempdir()?;
for item in &config_data {
let file_path = dir.path().join(item.file_name);
fs::write(file_path, item.content)?;
}
let config_file_path = dir.path().join(config_data[0].file_name);
let config_file_path = CString::new(config_file_path.to_str().unwrap()).unwrap();
let opencc = unsafe { opencc_sys::opencc_open(config_file_path.as_ptr()) };
let ptr = opencc as uintptr_t;
if ptr == uintptr_t::MAX {
return Err(Error::Create);
}
openccs.push(opencc);
}
Ok(OpenCC { openccs })
}
/// Convert a string to another string
pub fn convert<T>(&self, input: T) -> Result<String, Error>
where
T: AsRef<str>,
{
let mut length = input.as_ref().len();
let input = CString::new(input.as_ref()).unwrap();
let mut result_ptr = input.as_ptr().cast_mut();
let mut free = Vec::new();
for opencc in &self.openccs {
result_ptr = unsafe { opencc_sys::opencc_convert_utf8(*opencc, result_ptr, length) };
if result_ptr.is_null() {
return Err(Error::Convert);
}
free.push(result_ptr);
if self.openccs.len() > 1 {
length = unsafe { libc::strlen(result_ptr) };
}
}
let result_cstr = unsafe { CStr::from_ptr(result_ptr) };
let result = unsafe { std::str::from_utf8_unchecked(result_cstr.to_bytes()).to_string() };
for ptr in free {
unsafe {
opencc_sys::opencc_convert_utf8_free(ptr);
}
}
Ok(result)
}
}
impl Drop for OpenCC {
fn drop(&mut self) {
for opencc in &self.openccs {
if !opencc.is_null() {
unsafe {
opencc_sys::opencc_close(*opencc);
}
}
}
}
}
unsafe impl Send for OpenCC {}
unsafe impl Sync for OpenCC {}
/// Configurations
pub enum Config {
/// Simplified Chinese to Traditional Chinese (OpenCC Standard)
S2T,
/// Traditional Chinese (OpenCC Standard) to Simplified Chinese
T2S,
/// Simplified Chinese to Traditional Chinese (Taiwan Standard)
S2TW,
/// Traditional Chinese (Taiwan Standard) to Simplified Chinese
TW2S,
/// Simplified Chinese to Traditional Chinese (Hong Kong variant)
S2HK,
/// Traditional Chinese (Hong Kong variant) to Simplified Chinese
HK2S,
/// Simplified Chinese to Traditional Chinese (Taiwan Standard, with Taiwan Phrases)
S2TWP,
/// Traditional Chinese (Taiwan Standard) to Simplified Chinese (Mainland China Phrases)
TW2SP,
/// Traditional Chinese (OpenCC Standard) to Traditional Chinese (Taiwan Standard)
T2TW,
/// Traditional Chinese (Taiwan Standard) to Traditional Chinese (OpenCC Standard)
TW2T,
/// Traditional Chinese (OpenCC Standard) to Traditional Chinese (Hong Kong variant)
T2HK,
/// Traditional Chinese (Hong Kong variant) to Traditional Chinese (OpenCC Standard)
HK2T,
/// Simplified Chinese to Traditional Chinese (Hong Kong variant, with Hong Kong Phrases)
S2HKP,
/// Traditional Chinese (Hong Kong variant) to Simplified Chinese (Mainland China Phrases)
HK2SP,
/// Old Japanese Kanji (Kyūjitai) to New Japanese Kanji (Shinjitai)
T2JP,
/// New Japanese Kanji (Shinjitai) to Old Japanese Kanji (Kyūjitai)
JP2T,
}
impl Config {
fn get_data(&self) -> Vec<&opencc_sys::Data> {
use opencc_sys::*;
match self {
Config::S2T => vec![
&S2T_JSON,
&CJK_COMPATIBILITY_IDEOGRAPHS_OCD2,
&ST_PHRASES_OCD2,
&ST_PHRASES_GENERATED_FROM_REGIONAL_PHRASES_OCD2,
&ST_CHARACTERS_OCD2,
],
Config::T2S => vec![
&T2S_JSON,
&CJK_COMPATIBILITY_IDEOGRAPHS_OCD2,
&TS_PHRASES_OCD2,
&TS_CHARACTERS_EXT_OCD2,
&TS_CHARACTERS_OCD2,
],
Config::S2TW => vec![
&S2TW_JSON,
&CJK_COMPATIBILITY_IDEOGRAPHS_OCD2,
&ST_PHRASES_OCD2,
&ST_PHRASES_GENERATED_FROM_REGIONAL_PHRASES_OCD2,
&ST_CHARACTERS_OCD2,
&TW_VARIANTS_PHRASES_OCD2,
&TW_VARIANTS_OCD2,
],
Config::TW2S => vec![
&TW2S_JSON,
&CJK_COMPATIBILITY_IDEOGRAPHS_OCD2,
&TS_PHRASES_OCD2,
&TW_VARIANTS_REV_PHRASES_OCD2,
&TW_VARIANTS_REV_OCD2,
&TS_PHRASES_OCD2,
&TS_CHARACTERS_EXT_OCD2,
&TS_CHARACTERS_OCD2,
],
Config::S2HK => vec![
&S2HK_JSON,
&CJK_COMPATIBILITY_IDEOGRAPHS_OCD2,
&ST_PHRASES_OCD2,
&ST_PHRASES_GENERATED_FROM_REGIONAL_PHRASES_OCD2,
&ST_CHARACTERS_OCD2,
&HK_VARIANTS_PHRASES_OCD2,
&HK_VARIANTS_OCD2,
],
Config::HK2S => vec![
&HK2S_JSON,
&CJK_COMPATIBILITY_IDEOGRAPHS_OCD2,
&TS_PHRASES_OCD2,
&HK_VARIANTS_REV_PHRASES_OCD2,
&HK_VARIANTS_REV_OCD2,
&TS_PHRASES_OCD2,
&TS_CHARACTERS_EXT_OCD2,
&TS_CHARACTERS_OCD2,
],
Config::S2TWP => vec![
&S2TWP_JSON,
&CJK_COMPATIBILITY_IDEOGRAPHS_OCD2,
&ST_PHRASES_OCD2,
&ST_PHRASES_GENERATED_FROM_REGIONAL_PHRASES_OCD2,
&ST_CHARACTERS_OCD2,
&TW_PHRASES_OCD2,
&TW_VARIANTS_PHRASES_OCD2,
&TW_VARIANTS_OCD2,
],
Config::TW2SP => vec![
&TW2SP_JSON,
&CJK_COMPATIBILITY_IDEOGRAPHS_OCD2,
&TS_PHRASES_OCD2,
&TW_PHRASES_REV_OCD2,
&TW_VARIANTS_REV_PHRASES_OCD2,
&TW_VARIANTS_REV_OCD2,
&TS_PHRASES_OCD2,
&TS_CHARACTERS_EXT_OCD2,
&TS_CHARACTERS_OCD2,
],
Config::T2TW => vec![
&T2TW_JSON,
&CJK_COMPATIBILITY_IDEOGRAPHS_OCD2,
&TW_VARIANTS_PHRASES_OCD2,
&TW_VARIANTS_OCD2,
],
Config::TW2T => vec![
&TW2T_JSON,
&CJK_COMPATIBILITY_IDEOGRAPHS_OCD2,
&TW_VARIANTS_REV_PHRASES_OCD2,
&TW_VARIANTS_REV_OCD2,
],
Config::T2HK => vec![
&T2HK_JSON,
&CJK_COMPATIBILITY_IDEOGRAPHS_OCD2,
&HK_VARIANTS_PHRASES_OCD2,
&HK_VARIANTS_OCD2,
],
Config::HK2T => vec![
&HK2T_JSON,
&CJK_COMPATIBILITY_IDEOGRAPHS_OCD2,
&HK_VARIANTS_REV_PHRASES_OCD2,
&HK_VARIANTS_REV_OCD2,
],
Config::S2HKP => vec![
&S2HKP_JSON,
&CJK_COMPATIBILITY_IDEOGRAPHS_OCD2,
&ST_PHRASES_OCD2,
&ST_PHRASES_GENERATED_FROM_REGIONAL_PHRASES_OCD2,
&ST_CHARACTERS_OCD2,
&HK_PHRASES_OCD2,
&HK_VARIANTS_PHRASES_OCD2,
&HK_VARIANTS_OCD2,
],
Config::HK2SP => vec![
&HK2SP_JSON,
&CJK_COMPATIBILITY_IDEOGRAPHS_OCD2,
&TS_PHRASES_OCD2,
&HK_PHRASES_REV_OCD2,
&HK_VARIANTS_REV_PHRASES_OCD2,
&HK_VARIANTS_REV_OCD2,
&TS_PHRASES_OCD2,
&TS_CHARACTERS_EXT_OCD2,
&TS_CHARACTERS_OCD2,
],
Config::T2JP => vec![
&T2JP_JSON,
&CJK_COMPATIBILITY_IDEOGRAPHS_OCD2,
&JP_SHINJITAI_CHARACTERS_REV_OCD2,
],
Config::JP2T => vec![
&JP2T_JSON,
&CJK_COMPATIBILITY_IDEOGRAPHS_OCD2,
&JP_SHINJITAI_PHRASES_OCD2,
&JP_SHINJITAI_CHARATERS_OCD2,
],
}
}
}
/// OpenCC error
#[derive(Debug, Error)]
pub enum Error {
/// Failed to create opencc instance
#[error("Failed to create opencc instance")]
Create,
/// Failed to convert the string
#[error("Failed to convert the string")]
Convert,
/// IO error
#[error(transparent)]
StdIO(#[from] io::Error),
}