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extern crate libc;
use libc::c_char;
use std::ffi::CStr;
#[allow(non_camel_case_types)]
pub type c_bool = u8;
pub trait Flag
{
fn zero() -> Self;
}
pub unsafe fn from_c_str(c_str: *const c_char) -> String
{
String::from_utf8_lossy(CStr::from_ptr(c_str as *const _).to_bytes()).into_owned()
}
#[macro_export]
macro_rules! if_ok
{
($e: expr) =>
{
if ($e).is_err()
{
return Err(());
}
}
}
#[macro_export]
macro_rules! opaque
{
($f: ident) =>
{
#[allow(missing_copy_implementations)]
pub enum $f
{
}
}
}
#[macro_export]
macro_rules! derive_copy_clone
{
($t: ty) =>
{
impl Copy for $t {}
impl Clone for $t
{
fn clone(&self) -> Self
{
*self
}
}
}
}
#[macro_export]
macro_rules! flag_type
{
($f: ident { $($n: ident = $v: expr),*}) =>
{
#[derive(Copy, Clone)]
pub struct $f
{
bits: u32
}
impl $f
{
#[inline]
pub fn get(&self) -> u32
{
self.bits
}
}
impl Flag for $f
{
fn zero() -> $f
{
$f{bits: 0}
}
}
impl ::std::ops::BitOr for $f
{
type Output = $f;
fn bitor(self, e: $f) -> $f
{
$f{bits: self.bits | e.bits}
}
}
impl ::std::ops::BitAnd for $f
{
type Output = bool;
fn bitand(self, e: $f) -> bool
{
self.bits & e.bits != 0
}
}
$(
pub const $n: $f = $f{bits: $v};
)+
}
}
#[macro_export]
macro_rules! flags
{
($f: ident { $($n: ident = $v: expr),*}) =>
{
$(
pub const $n: $f = $f{bits: $v};
)+
}
}
#[macro_export]
macro_rules! cast_to_c
{
($p:ident, f32) =>
{
$p as c_float
};
($p:ident, Color) =>
{
*$p
}
}