Struct unqlite::Entry

pub struct Entry(_);

A valid cursor entry of record.

Implementations

impl Entry

pub fn key(&self) -> Vec<u8>

Returns the key of record

pub fn value(&self) -> Vec<u8>

Returns the value

pub fn key_value(&self) -> (Vec<u8>, Vec<u8>)

Returns the key-value pair

pub fn key_callback(
    &self,
    func: extern "C" fn(_: *const c_void, _: u32, _: *mut c_void) -> i32,
    data: *mut c_void
)

Use mangle function for callback of key.

The callback function should define as this:

#[no_mangle]
#[allow(private_no_mangle_fns)]         // <-- this should be added to avoid warning
pub extern fn print_data(ptr: *const c_void, len: u32, _data: *mut c_void) -> i32 {
    // Do stuff with (ptr, len)
    println!("Key/Value length is {}", len);
    0
}

pub fn value_callback(
    &self,
    func: extern "C" fn(_: *const c_void, _: u32, _: *mut c_void) -> i32,
    data: *mut c_void
)

Use mangle function for callback of value

pub fn next(self) -> Option<Self>

Goto next entry.

Returns None if there's no valid cursors.

pub fn prev(self) -> Option<Self>

Goto previous entry.

Returns None if no valid cursors.

pub fn delete(self) -> Option<Self>

Delete the pointed record.