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102 lines
3.4 KiB
102 lines
3.4 KiB
10 years ago
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use libc::c_int;
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use std::error::Error;
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use std::io::IoError;
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use std::str;
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use ffi;
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#[deriving(Show, Eq, PartialEq)]
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pub enum LmdbError {
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KeyExist,
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NotFound,
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PageNotFound,
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Corrupted,
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Panic,
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VersionMismatch,
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Invalid,
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MapFull,
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DbsFull,
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ReadersFull,
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TlsFull,
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TxnFull,
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CursorFull,
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PageFull,
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MapResized,
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Incompatible,
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BadRslot,
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BadTxn,
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BadValSize,
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BadDbi,
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Unknown(c_int),
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Io(IoError),
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}
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impl Error for LmdbError {
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fn description(&self) -> &str {
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let err_code = match *self {
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LmdbError::KeyExist => ffi::MDB_KEYEXIST,
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LmdbError::NotFound => ffi::MDB_NOTFOUND,
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LmdbError::PageNotFound => ffi::MDB_PAGE_NOTFOUND,
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LmdbError::Corrupted => ffi::MDB_CORRUPTED,
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LmdbError::Panic => ffi::MDB_PANIC,
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LmdbError::VersionMismatch => ffi::MDB_VERSION_MISMATCH,
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LmdbError::Invalid => ffi::MDB_INVALID,
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LmdbError::MapFull => ffi::MDB_MAP_FULL,
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LmdbError::DbsFull => ffi::MDB_DBS_FULL,
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LmdbError::ReadersFull => ffi::MDB_READERS_FULL,
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LmdbError::TlsFull => ffi::MDB_TLS_FULL,
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LmdbError::TxnFull => ffi::MDB_TXN_FULL,
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LmdbError::CursorFull => ffi::MDB_CURSOR_FULL,
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LmdbError::PageFull => ffi::MDB_PAGE_FULL,
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LmdbError::MapResized => ffi::MDB_MAP_RESIZED,
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LmdbError::Incompatible => ffi::MDB_INCOMPATIBLE,
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LmdbError::BadRslot => ffi::MDB_BAD_RSLOT,
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LmdbError::BadTxn => ffi::MDB_BAD_TXN,
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LmdbError::BadValSize => ffi::MDB_BAD_VALSIZE,
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LmdbError::BadDbi => ffi::MDB_BAD_DBI,
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LmdbError::Unknown(i) => i,
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LmdbError::Io(ref io_error) => return io_error.description(),
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};
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unsafe { str::raw::c_str_to_static_slice(ffi::mdb_strerror(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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match err_code {
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i if i > 0 => LmdbError::Io(IoError::from_errno(err_code as uint, true)),
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ffi::MDB_KEYEXIST => LmdbError::KeyExist,
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ffi::MDB_NOTFOUND => LmdbError::NotFound,
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ffi::MDB_PAGE_NOTFOUND => LmdbError::PageNotFound,
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ffi::MDB_CORRUPTED => LmdbError::Corrupted,
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ffi::MDB_PANIC => LmdbError::Panic,
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ffi::MDB_VERSION_MISMATCH => LmdbError::VersionMismatch,
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ffi::MDB_INVALID => LmdbError::Invalid,
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ffi::MDB_MAP_FULL => LmdbError::MapFull,
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ffi::MDB_DBS_FULL => LmdbError::DbsFull,
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ffi::MDB_READERS_FULL => LmdbError::ReadersFull,
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ffi::MDB_TLS_FULL => LmdbError::TlsFull,
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ffi::MDB_TXN_FULL => LmdbError::TxnFull,
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ffi::MDB_CURSOR_FULL => LmdbError::CursorFull,
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ffi::MDB_PAGE_FULL => LmdbError::PageFull,
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ffi::MDB_MAP_RESIZED => LmdbError::MapResized,
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ffi::MDB_INCOMPATIBLE => LmdbError::Incompatible,
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ffi::MDB_BAD_RSLOT => LmdbError::BadRslot,
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ffi::MDB_BAD_TXN => LmdbError::BadTxn,
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ffi::MDB_BAD_VALSIZE => LmdbError::BadValSize,
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i => LmdbError::Unknown(i),
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}
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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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