use std::mem::size_of;
use duplicate::duplicate;
pub trait StructFromBytes<T: PackedSize = Self>: PackedSize {
fn from_bytes(slice: &[u8], offset: usize) -> std::io::Result<Box<Self>>;
}
pub trait PackedSize {
fn packed_size() -> usize;
}
#[duplicate(
int_type;
[u8];
[u16];
[u32];
[u64];
[u128];
[i8];
[i16];
[i32];
[i64];
[i128];
)]
impl PackedSize for int_type { fn packed_size() -> usize { return size_of::<int_type>(); } }
#[cfg(feature = "u8_arrays")]
#[duplicate(array_length; [1]; [2]; [3]; [4]; [6]; [8]; [10]; [12]; [14]; [16]; )]
impl PackedSize for [u8;array_length] { fn packed_size() -> usize { return array_length * size_of::<u8>(); } }
#[cfg(feature = "u16_arrays")]
#[duplicate(array_length; [1]; [2]; [3]; [4]; [6]; [8]; [10]; [12]; [14]; [16]; )]
impl PackedSize for [u16;array_length] { fn packed_size() -> usize { return array_length * size_of::<u16>(); } }
#[cfg(feature = "u32_arrays")]
#[duplicate(array_length; [1]; [2]; [3]; [4]; [6]; [8]; [10]; [12]; [14]; [16]; )]
impl PackedSize for [u32;array_length] { fn packed_size() -> usize { return array_length * size_of::<u32>(); } }
#[cfg(feature = "u64_arrays")]
#[duplicate(array_length; [1]; [2]; [3]; [4]; [6]; [8]; [10]; [12]; [14]; [16]; )]
impl PackedSize for [u64;array_length] { fn packed_size() -> usize { return array_length * size_of::<u64>(); } }
#[cfg(feature = "i8_arrays")]
#[duplicate(array_length; [1]; [2]; [3]; [4]; [6]; [8]; [10]; [12]; [14]; [16]; )]
impl PackedSize for [i8;array_length] { fn packed_size() -> usize { return array_length * size_of::<i8>(); } }
#[cfg(feature = "i16_arrays")]
#[duplicate(array_length; [1]; [2]; [3]; [4]; [6]; [8]; [10]; [12]; [14]; [16]; )]
impl PackedSize for [i16;array_length] { fn packed_size() -> usize { return array_length * size_of::<i16>(); } }
#[cfg(feature = "i32_arrays")]
#[duplicate(array_length; [1]; [2]; [3]; [4]; [6]; [8]; [10]; [12]; [14]; [16]; )]
impl PackedSize for [i32;array_length] { fn packed_size() -> usize { return array_length * size_of::<i32>(); } }
#[cfg(feature = "i64_arrays")]
#[duplicate(array_length; [1]; [2]; [3]; [4]; [6]; [8]; [10]; [12]; [14]; [16]; )]
impl PackedSize for [i64;array_length] { fn packed_size() -> usize { return array_length * size_of::<i64>(); } }