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use std::ffi::{CStr, CString};
use std::ptr::null_mut;
use hunspell_sys as ffi;
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum CheckResult {
FoundInDictionary,
MissingInDictionary,
}
pub struct Hunspell {
handle: *mut ffi::Hunhandle,
}
fn to_hex_str(s: &CStr) -> String {
let bytes = s.to_bytes();
let mut acc = String::with_capacity(6 * bytes.len());
let mut iter = bytes.iter();
acc += "[";
if let Some(byte) = iter.next() {
acc += &format!("0x{:02x}", byte);
for byte in iter {
acc += &format!(", 0x{:02x}", byte);
}
}
acc += "]";
acc
}
macro_rules! extract_vec {
( $fname:ident, $handle:expr, $( $arg:expr ),* ) => {
{
let mut result = Vec::new();
unsafe {
let mut list = null_mut();
let n = ffi::$fname($handle, &mut list, $( $arg ),*) as isize;
if n != 0 && list != null_mut() {
for i in 0..n {
let item_ptr_ptr = list.offset(i);
if *item_ptr_ptr != null_mut() {
let item = CStr::from_ptr(*item_ptr_ptr);
match item.to_str() {
Ok(s) => result.push(String::from(s)),
Err(e) => {
let args = [$( format!("{:?}", CStr::from_ptr($arg)) ),*];
let fname = stringify!($fname);
let hex = to_hex_str(item);
log::warn!(target: "hunspell,", "Error {e:?} returned from {fname}(handle, {args:?}) when converting `CStr` to `String` str: {i}: {hex:?}");
},
}
} else {
let args = [$( format!("{:?}", CStr::from_ptr($arg)) ),*];
let fname = stringify!($fname);
log::warn!(target: "hunspell", "Suggestion list contained null-pointer when calling {fname}(handle, {args:?})");
}
}
ffi::Hunspell_free_list($handle, &mut list, n as i32);
}
}
result
}
}
}
impl Hunspell {
pub fn new(affpath: &str, dicpath: &str) -> Hunspell {
let affpath = CString::new(affpath).unwrap();
let dicpath = CString::new(dicpath).unwrap();
unsafe {
Hunspell {
handle: ffi::Hunspell_create(affpath.as_ptr(), dicpath.as_ptr()),
}
}
}
pub fn new_with_key(affpath: &str, dicpath: &str, key: &str) -> Hunspell {
let affpath = CString::new(affpath).unwrap();
let dicpath = CString::new(dicpath).unwrap();
let key = CString::new(key).unwrap();
unsafe {
Hunspell {
handle: ffi::Hunspell_create_key(affpath.as_ptr(), dicpath.as_ptr(), key.as_ptr()),
}
}
}
pub fn add_dictionary(&mut self, dicpath: &str) -> bool {
let dicpath = CString::new(dicpath).unwrap();
unsafe { ffi::Hunspell_add_dic(self.handle, dicpath.as_ptr()) == 0 }
}
pub fn add(&mut self, word: &str) -> bool {
let cword = CString::new(word).unwrap();
unsafe { ffi::Hunspell_add(self.handle, cword.as_ptr()) == 0 }
}
pub fn check(&self, word: &str) -> CheckResult {
let word = CString::new(word).unwrap();
let ret = unsafe { ffi::Hunspell_spell(self.handle, word.as_ptr()) };
match ret {
0 => CheckResult::MissingInDictionary,
_ => CheckResult::FoundInDictionary,
}
}
pub fn suggest(&self, word: &str) -> Vec<String> {
let word = CString::new(word).unwrap();
extract_vec!(Hunspell_suggest, self.handle, word.as_ptr())
}
pub fn analyze(&self, word: &str) -> Vec<String> {
let word = CString::new(word).unwrap();
extract_vec!(Hunspell_analyze, self.handle, word.as_ptr())
}
pub fn stem(&self, word: &str) -> Vec<String> {
let word = CString::new(word).unwrap();
extract_vec!(Hunspell_stem, self.handle, word.as_ptr())
}
pub fn generate(&self, word1: &str, word2: &str) -> Vec<String> {
let word1 = CString::new(word1).unwrap();
let word2 = CString::new(word2).unwrap();
extract_vec!(
Hunspell_generate,
self.handle,
word1.as_ptr(),
word2.as_ptr()
)
}
}
impl Drop for Hunspell {
fn drop(&mut self) {
unsafe {
ffi::Hunspell_destroy(self.handle);
}
}
}
#[cfg(test)]
mod tests;
