ruru 0.9.3

Native Ruby extensions in Rust
Documentation 
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

use ruby_sys::hash;

use binding::fixnum;
use types::{CallbackPtr, CallbackMutPtr, Value};
use AnyObject;

pub fn new() -> Value {
    unsafe { hash::rb_hash_new() }
}

pub fn aref(hash: Value, key: Value) -> Value {
    unsafe { hash::rb_hash_aref(hash, key) }
}

pub fn aset(hash: Value, key: Value, value: Value) -> Value {
    unsafe { hash::rb_hash_aset(hash, key, value) }
}

pub fn clear(hash: Value) {
    let _ = unsafe { hash::rb_hash_clear(hash) };
}

pub fn delete(hash: Value, key: Value) -> Value {
    unsafe { hash::rb_hash_delete(hash, key) }
}

pub fn dup(hash: Value) -> Value {
    unsafe { hash::rb_hash_dup(hash) }
}

pub fn length(hash: Value) -> i64 {
    unsafe {
        let size = hash::rb_hash_size(hash);

        fixnum::num_to_int(size)
    }
}

pub fn each<F>(hash: Value, closure_callback: F)
    where F: FnMut(AnyObject, AnyObject)
{
    let closure_ptr = &closure_callback as *const _ as CallbackMutPtr;

    unsafe {
        hash::rb_hash_foreach(hash, each_callback::<F> as CallbackPtr, closure_ptr);
    }
}

extern "C" fn each_callback<F>(key: AnyObject, value: AnyObject, closure: CallbackMutPtr)
    where F: FnMut(AnyObject, AnyObject)
{
    let closure = closure as *mut F;

    unsafe {
        (*closure)(key, value);
    }
}