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use std::ffi::CString;
use std::mem;
use std::ptr;
use std::slice;
use super::*;
use libc::*;
fn leak_buf(v: Vec<u8>, vallen: *mut size_t) -> *mut c_char {
unsafe {
*vallen = v.len();
}
let mut bsv = v.into_boxed_slice();
let val = bsv.as_mut_ptr() as *mut i8;
mem::forget(bsv);
val
}
#[no_mangle]
pub unsafe extern "C" fn rsdb_create_config() -> *mut Config {
Box::into_raw(Box::new(Config::default()))
}
#[no_mangle]
pub unsafe extern "C" fn rsdb_destroy_config(config: *mut Config) {
drop(Box::from_raw(config));
}
#[no_mangle]
pub unsafe extern "C" fn rsdb_config_set_path(config: *mut Config, path: *const c_char) {
let value = if path.is_null() {
None
} else {
let c_str = CString::from_raw(path as *mut i8);
let c_str2 = c_str.clone();
let value = c_str2.into_string().unwrap();
mem::forget(c_str);
Some(value)
};
(*config).set_path(value)
}
#[no_mangle]
pub unsafe extern "C" fn rsdb_config_set_cache_capacity(config: *mut Config, capacity: size_t) {
(*config).set_cache_capacity(capacity)
}
#[no_mangle]
pub unsafe extern "C" fn rsdb_config_use_compression(
config: *mut Config,
use_compression: c_uchar,
) {
(*config).set_use_compression(use_compression == 1)
}
#[no_mangle]
pub unsafe extern "C" fn rsdb_config_flush_every_ms(config: *mut Config, flush_every: c_int) {
let val = if flush_every < 0 {
None
} else {
Some(flush_every as u64)
};
(*config).set_flush_every_ms(val)
}
#[no_mangle]
pub unsafe extern "C" fn rsdb_config_snapshot_after_ops(
config: *mut Config,
snapshot_after: size_t,
) {
(*config).set_snapshot_after_ops(snapshot_after)
}
#[no_mangle]
pub unsafe extern "C" fn rsdb_open(config: *mut Config) -> *mut Tree {
let conf_2 = (*config).clone();
Box::into_raw(Box::new(Tree::new(conf_2)))
}
#[no_mangle]
pub unsafe extern "C" fn rsdb_close(db: *mut Tree) {
drop(Box::from_raw(db));
}
pub unsafe extern "C" fn rsdb_free_buf(buf: *mut c_char, sz: size_t) {
drop(Vec::from_raw_parts(buf, sz, sz));
}
pub unsafe extern "C" fn rsdb_free_iter(iter: *mut TreeIter) {
drop(Box::from_raw(iter));
}
#[no_mangle]
pub unsafe extern "C" fn rsdb_set(
db: *mut Tree,
key: *const c_uchar,
keylen: size_t,
val: *const c_uchar,
vallen: size_t,
) {
let k = slice::from_raw_parts(key, keylen).to_vec();
let v = slice::from_raw_parts(val, vallen).to_vec();
(*db).set(k.clone(), v.clone());
mem::forget(k);
mem::forget(v);
}
#[no_mangle]
pub unsafe extern "C" fn rsdb_get(
db: *mut Tree,
key: *const c_char,
keylen: size_t,
vallen: *mut size_t,
) -> *mut c_char {
let k = slice::from_raw_parts(key as *const u8, keylen);
let res = (*db).get(k);
mem::forget(k);
match res {
None => ptr::null_mut(),
Some(v) => leak_buf(v, vallen),
}
}
#[no_mangle]
pub unsafe extern "C" fn rsdb_del(db: *mut Tree, key: *const c_char, keylen: size_t) {
let k = slice::from_raw_parts(key as *const u8, keylen);
(*db).del(k);
mem::forget(k);
}
#[no_mangle]
pub unsafe extern "C" fn rsdb_cas(
db: *mut Tree,
key: *const c_char,
keylen: size_t,
old_val: *const c_uchar,
old_vallen: size_t,
new_val: *const c_uchar,
new_vallen: size_t,
actual_val: *mut *const c_uchar,
actual_vallen: *mut size_t,
) -> c_uchar {
let k = slice::from_raw_parts(key as *const u8, keylen).to_vec();
let old = if old_vallen == 0 {
None
} else {
let old_slice = slice::from_raw_parts(old_val as *const u8, old_vallen);
let copy = old_slice.clone().to_vec();
mem::forget(old_slice);
Some(copy)
};
let new = if new_vallen == 0 {
None
} else {
let new_slice = slice::from_raw_parts(new_val as *const u8, new_vallen);
let copy = new_slice.clone().to_vec();
mem::forget(new_slice);
Some(copy)
};
let res = (*db).cas(k.clone(), old, new);
mem::forget(k);
match res {
Ok(()) => {
return 1;
}
Err(None) => {
*actual_vallen = 0;
return 0;
}
Err(Some(v)) => {
*actual_val = leak_buf(v, actual_vallen) as *const u8;
return 0;
}
}
}
#[no_mangle]
pub unsafe extern "C" fn rsdb_scan<'a>(
db: *mut Tree,
key: *const c_char,
keylen: size_t,
) -> *mut TreeIter<'a> {
let k = slice::from_raw_parts(key as *const u8, keylen);
let iter = (*db).scan(k);
Box::into_raw(Box::new(iter))
}
#[no_mangle]
pub unsafe extern "C" fn rsdb_iter_next(
iter: *mut TreeIter,
key: *mut *const c_char,
keylen: *mut size_t,
val: *mut *const c_char,
vallen: *mut size_t,
) -> c_uchar {
match (*iter).next() {
Some((k, v)) => {
*key = leak_buf(k, keylen);
*val = leak_buf(v, vallen);
return 1;
}
None => {
return 0;
}
}
}