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50 lines
1.0 KiB
50 lines
1.0 KiB
use libc::c_int;
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use std::error::Error;
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use std::str;
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use ffi;
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#[deriving(Show, Eq, PartialEq, Copy, Clone)]
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pub struct LmdbError {
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err_code: c_int,
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}
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impl Error for LmdbError {
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fn description(&self) -> &str {
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unsafe { str::from_c_str(ffi::mdb_strerror(self.err_code) as *const _) }
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}
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}
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impl LmdbError {
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pub fn from_err_code(err_code: c_int) -> LmdbError {
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LmdbError { err_code: err_code}
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}
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}
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pub type LmdbResult<T> = Result<T, LmdbError>;
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pub fn lmdb_result(err_code: c_int) -> LmdbResult<()> {
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if err_code == ffi::MDB_SUCCESS {
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Ok(())
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} else {
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Err(LmdbError::from_err_code(err_code))
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}
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}
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#[cfg(test)]
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mod test {
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use std::error::Error;
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use super::*;
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use ffi;
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#[test]
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fn test_description() {
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assert_eq!("Permission denied",
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LmdbError::from_err_code(13).description());
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assert_eq!("MDB_NOTFOUND: No matching key/data pair found",
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LmdbError::from_err_code(ffi::MDB_NOTFOUND).description());
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}
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}
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