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
128
129
130
131

use std::ffi::{CStr, CString};
use std::mem;

use td_clua;
use td_clua::lua_State;
use libc;

use LuaRead;
use LuaPush;

macro_rules! integer_impl(
    ($t:ident) => (
        impl LuaPush for $t {
            fn push_to_lua(self, lua: *mut lua_State) -> i32 {
                unsafe { td_clua::lua_pushinteger(lua, self as td_clua::lua_Integer) };
                1
            }
        }

        impl LuaRead for $t {
            fn lua_read_with_pop(lua: *mut lua_State, index: i32, _pop: i32) -> Option<$t> {
                let mut success = unsafe { mem::uninitialized() };
                let val = unsafe { td_clua::lua_tointegerx(lua, index, &mut success) };
                match success {
                    0 => None,
                    _ => Some(val as $t)
                }
            }
        }
    );
);

integer_impl!(i8);
integer_impl!(i16);
integer_impl!(i32);
integer_impl!(i64);
integer_impl!(u8);
integer_impl!(u16);
integer_impl!(u32);
integer_impl!(u64);
integer_impl!(usize);

macro_rules! numeric_impl(
    ($t:ident) => (
        impl LuaPush for $t {
            fn push_to_lua(self, lua: *mut lua_State) -> i32 {
                unsafe { td_clua::lua_pushnumber(lua, self as f64) };
                1
            }
        }

        impl LuaRead for $t {
            fn lua_read_with_pop(lua: *mut lua_State, index: i32, _pop: i32) -> Option<$t> {
                let mut success = unsafe { mem::uninitialized() };
                let val = unsafe { td_clua::lua_tonumberx(lua, index, &mut success) };
                match success {
                    0 => None,
                    _ => Some(val as $t)
                }
            }
        }
    );
);

numeric_impl!(f32);
numeric_impl!(f64);

impl LuaPush for String {
    fn push_to_lua(self, lua: *mut lua_State) -> i32 {
        if let Some(value) = CString::new(&self[..]).ok() {
            unsafe { td_clua::lua_pushstring(lua, value.as_ptr()) };
            1
        } else {
            let value = CString::new(&"UNVAILED STRING"[..]).unwrap();
            unsafe { td_clua::lua_pushstring(lua, value.as_ptr()) };
            1
        }
    }
}

impl LuaRead for String {
    fn lua_read_with_pop(lua: *mut lua_State, index: i32, _pop: i32) -> Option<String> {
        let mut size: libc::size_t = unsafe { mem::uninitialized() };
        let c_str_raw = unsafe { td_clua::lua_tolstring(lua, index, &mut size) };
        if c_str_raw.is_null() {
            return None;
        }

        let c_str = unsafe { CStr::from_ptr(c_str_raw) };
        let c_str = String::from_utf8_lossy(c_str.to_bytes());
        Some(c_str.to_string())
    }
}

impl<'s> LuaPush for &'s str {
    fn push_to_lua(self, lua: *mut lua_State) -> i32 {
        let value = CString::new(&self[..]).unwrap();
        unsafe { td_clua::lua_pushstring(lua, value.as_ptr()) };
        1
    }
}

impl LuaPush for bool {
    fn push_to_lua(self, lua: *mut lua_State) -> i32 {
        unsafe { td_clua::lua_pushboolean(lua, self.clone() as libc::c_int) };
        1
    }
}

impl LuaRead for bool {
    fn lua_read_with_pop(lua: *mut lua_State, index: i32, _pop: i32) -> Option<bool> {
        if unsafe { td_clua::lua_isboolean(lua, index) } != true {
            return None;
        }

        Some(unsafe { td_clua::lua_toboolean(lua, index) != 0 })
    }
}

impl LuaPush for () {
    fn push_to_lua(self, lua: *mut lua_State) -> i32 {
        unsafe { td_clua::lua_pushnil(lua) };
        1
    }
}

impl LuaRead for () {
    fn lua_read_with_pop(_: *mut lua_State, _: i32, _pop: i32) -> Option<()> {
        Some(())
    }
}