1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127
extern crate libc; use libc::*; use std::ffi::{CString, CStr}; use std::str; use std::fmt::Display; use std::fmt; use std::slice; #[repr(C)] pub struct KCDB { pub db: *mut c_void } pub enum Mode { READER = 1 << 0, WRITER = 1 << 1, CREATE = 1 << 2, TRUNCATE = 1 << 3, AUTOTRAN = 1 << 4, AUTOSYNC = 1 << 5, NOLOCK = 1 << 6, TRYLOCK = 1 << 7, NOREPAIR = 1 << 8 } #[link(name = "kyotocabinet")] extern { pub fn kcdbnew() -> *mut KCDB; pub fn kcdbdel(db: *mut KCDB); pub fn kcdbopen(db: *mut KCDB, path: *const c_char, mode: uint32_t) -> int32_t; pub fn kcdbclose(db: *mut KCDB) -> int32_t; pub fn kcdbemsg(db: *mut KCDB) -> *const c_char; pub fn kcdbset(db: *mut KCDB, kbuf: *const c_char, ksiz: size_t , vbuf: *const c_char, vsiz: size_t) -> int32_t; pub fn kcdbget(db: *mut KCDB, kbuf: *const c_char, ksiz: size_t, sp: *mut size_t) -> *mut c_char; } #[derive(Debug, Clone)] pub enum KCErrorType { OPEN } pub struct KCError { pub kind: KCErrorType, pub msg: String } impl Display for KCError { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { let kind = self.kind.clone() as u32; f.write_fmt(format_args!("Error Type = {}, Error message: {}", kind, self.msg)) } } pub struct DB { kcdb: *mut KCDB } impl DB { pub fn open(path: &str, mode: u32) -> Result<DB, KCError> { return unsafe { let db = kcdbnew(); let _path = CString::new(path).unwrap(); let ret = kcdbopen(db, _path.as_ptr(), mode); if ret == 0 { let msg = str::from_utf8(CStr::from_ptr(kcdbemsg(db)) .to_bytes()) .unwrap() .to_string(); Err(KCError{kind: KCErrorType::OPEN, msg: msg}) } else { Ok(DB {kcdb: db}) } } } pub fn set_bytes(&mut self, key: &str, value: &[u8]) -> bool { unsafe { let _key = CString::new(key).unwrap(); kcdbset(self.kcdb, _key.as_ptr(), key.len(), value.as_ptr() as *const i8, value.len()) != 0 } } pub fn set(&mut self, key: &str, value: &str) -> bool { self.set_bytes(key, value.as_bytes()) } pub fn get_bytes(&mut self, key: &str) -> Option<Vec<u8>> { let mut sp: usize = 0; let _key = CString::new(key).unwrap(); let c_val = unsafe { kcdbget(self.kcdb, _key.as_ptr(), key.len(), &mut sp) }; if c_val.is_null() { None } else { let u8_val = c_val as *const u8; let _val = unsafe { slice::from_raw_parts(u8_val, sp).to_vec() }; Some(_val) } } pub fn get(&mut self, key: &str) -> Option<String> { match self.get_bytes(key) { None => None, Some(vec_u8) => { unsafe { Some(String::from_utf8_unchecked(vec_u8)) } } } } } impl Drop for DB { fn drop(&mut self) { unsafe { kcdbclose(self.kcdb); kcdbdel(self.kcdb); } } }