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Now supporting primitive type conversion with a trait!

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This changes the old Transmutable trait to Converter and adds a new
Transmutable trait to all the primitive number types.
This commit is contained in:
Jason Travis Smith 2016-01-05 17:46:31 -05:00
parent 010abeff7c
commit e7f2f252fa
4 changed files with 621 additions and 258 deletions
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257
src/converter.rs Normal file
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@ -0,0 +1,257 @@
use std::mem;
/// Describes types that can convert Numbers into bytes,
/// or bytes into Numbers.
pub trait Converter
{
/// Converts an array of bytes to a signed 16-bit integer.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough information to convert.
fn bytes_to_i16(buffer: &[u8]) -> i16
{
Self::bytes_to_u16(buffer) as i16
}
/// Converts an array of bytes to a signed 32-bit integer.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough information to convert.
fn bytes_to_i32(buffer: &[u8]) -> i32
{
Self::bytes_to_u32(buffer) as i32
}
/// Converts an array of bytes to a signed 64-bit integer.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough information to convert.
fn bytes_to_i64(buffer: &[u8]) -> i64
{
Self::bytes_to_u64(buffer) as i64
}
/// Converts an array of bytes to a signed integer.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough information to convert.
///
/// This will panic if the number of bytes
/// passed in is less than one or more than eight.
fn bytes_to_isize(buffer: &[u8]) -> isize
{
let temp_num: u64;
assert!(buffer.len() >= 1 && buffer.len() <= 8);
temp_num = Self::bytes_to_usize(buffer) as u64;
add_sign(temp_num, buffer.len() as u8) as isize
}
/// Converts an array of bytes to a 32-bit floating point number.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough information to convert.
fn bytes_to_f32(buffer: &[u8]) -> f32
{
unsafe
{
mem::transmute::<u32, f32>(Self::bytes_to_u32(buffer))
}
}
/// Converts an array of bytes to a 64-bit floating point number.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough information to convert.
fn bytes_to_f64(buffer: &[u8]) -> f64
{
unsafe
{
mem::transmute::<u64, f64>(Self::bytes_to_u64(buffer))
}
}
/// Converts a signed 16-bit integer to bytes
/// and places them into the given buffer.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough space to store the converted value.
fn i16_to_bytes(buffer: &mut [u8], num: i16)
{
Self::u16_to_bytes(buffer, num as u16)
}
/// Converts a signed 32-bit integer to bytes
/// and places them into the given buffer.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough space to store the converted value.
fn i32_to_bytes(buffer: &mut [u8], num: i32)
{
Self::u32_to_bytes(buffer, num as u32)
}
/// Converts a signed 64-bit integer to bytes
/// and places them into the given buffer.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough space to store the converted value.
fn i64_to_bytes(buffer: &mut [u8], num: i64)
{
Self::u64_to_bytes(buffer, num as u64)
}
/// Converts a signed integer to bytes
/// and places them into the given buffer.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough space to store the converted value.
///
/// This will panic if the number of bytes
/// passed in is less than the byte size of the given number
/// or more than eight.
fn isize_to_bytes(buffer: &mut [u8], num: isize)
{
let temp_num: usize;
assert!(buffer.len() >= 1 && buffer.len() <= 8);
temp_num = remove_sign(num as i64, buffer.len() as u8) as usize;
Self::usize_to_bytes(buffer, temp_num)
}
/// Converts a 32-bit floating point number to bytes
/// and places them into the given buffer.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough space to store the converted value.
fn f32_to_bytes(buffer: &mut [u8], num: f32)
{
unsafe
{
Self::u32_to_bytes(buffer, mem::transmute::<f32, u32>(num));
}
}
/// Converts a 64-bit floating point number to bytes
/// and places them into the given buffer.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough space to store the converted value.
fn f64_to_bytes(buffer: &mut [u8], num: f64)
{
unsafe
{
Self::u64_to_bytes(buffer, mem::transmute::<f64, u64>(num));
}
}
/// Converts an array of bytes to an unsigned 16-bit integer.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough information to convert.
fn bytes_to_u16(buffer: &[u8]) -> u16;
/// Converts an array of bytes to an unsigned 32-bit integer.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough information to convert.
fn bytes_to_u32(buffer: &[u8]) -> u32;
/// Converts an array of bytes to an unsigned 64-bit integer.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough information to convert.
fn bytes_to_u64(buffer: &[u8]) -> u64;
/// Converts an array of bytes to an unsigned integer.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough information to convert.
///
/// This will panic if the number of bytes
/// passed in is less than one or more than eight.
fn bytes_to_usize(buffer: &[u8]) -> usize;
/// Converts an unsigned 16-bit integer to bytes
/// and places them into the given buffer.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough space to store the converted value.
fn u16_to_bytes(buffer: &mut [u8], num: u16);
/// Converts an unsigned 32-bit integer to bytes
/// and places them into the given buffer.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough space to store the converted value.
fn u32_to_bytes(buffer: &mut [u8], num: u32);
/// Converts an unsigned 64-bit integer to bytes
/// and places them into the given buffer.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough space to store the converted value.
fn u64_to_bytes(buffer: &mut [u8], num: u64);
/// Converts an unsigned integer to bytes
/// and places them into the given buffer.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough space to store the converted value.
///
/// This will panic if the number of bytes
/// passed in is less than the byte size of the given number
/// or more than eight.
fn usize_to_bytes(buffer: &mut [u8], num: usize);
}
/// Switches an unsigned value into its signed equivalent.
///
/// NOTE: This seems messy for larger unsigned values.
fn add_sign(val: u64, num_bytes: u8) -> i64
{
let shift: u8;
shift = (8 - num_bytes) * 8;
(val << shift) as i64 >> shift
}
/// Switches a signed value into its unsigned equivalent.
///
/// NOTE: This seems messy for values under zero.
fn remove_sign(val: i64, num_bytes: u8) -> u64
{
let shift: u8;
shift = (8 - num_bytes) * 8;
(val << shift) as u64 >> shift
}

24
src/endian.rs
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@ -1,7 +1,8 @@
use std::mem;
use std::ptr::copy_nonoverlapping;
use super::transmutable::Transmutable;
use ::converter::Converter;
/// Handles serialization where the most
@ -27,6 +28,23 @@ pub type PlatformEndian = BigEndian;
#[cfg(not(target_endian="big"))]
pub type PlatformEndian = LittleEndian;
/// Create an enumeration of the different
/// available endianesses.
pub enum Endianess
{
/// Referes to BigEndian.
BIG,
/// Referes to LittleEndian.
LITTLE,
/// Referes to PlatformEndian. This can be anyone
/// of the other available endians depending on
/// the platform you are on.
PLATFORM
}
/// Handles reading bytes from a given buffer
/// and turning them into the requested type.
@ -75,7 +93,7 @@ macro_rules! write_bytes
impl Transmutable for BigEndian
impl Converter for BigEndian
{
fn bytes_to_u16(buffer: &[u8]) -> u16
{
@ -147,7 +165,7 @@ impl Transmutable for BigEndian
}
}
impl Transmutable for LittleEndian
impl Converter for LittleEndian
{
fn bytes_to_u16(buffer: &[u8]) -> u16
{

7
src/lib.rs
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@ -4,9 +4,12 @@ extern crate sigils;
mod transmutable;
mod converter;
mod endian;
mod transmutable;
pub use ::converter::Converter;
pub use ::endian::{BigEndian, LittleEndian, PlatformEndian, Endianess};
pub use ::transmutable::Transmutable;
pub use ::endian::{BigEndian, LittleEndian, PlatformEndian};

591
src/transmutable.rs
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@ -1,275 +1,360 @@
use std::mem;
use std::{u8, u16, u32, u64, usize};
use std::{i8, i16, i32, i64, isize};
use ::converter::Converter;
use ::endian::{BigEndian, LittleEndian, PlatformEndian, Endianess};
/// Describes types that can transmute Numbers into bytes,
/// or bytes into Numbers. This means that they can also
/// transmute higher order mathematic types like Vectors,
/// Quaternions, Matrices, and such.
/// Handles the repetative
macro_rules! handle_endianess_to_bytes
{
($buffer: ident, $val: ident, $endianess: ident, $func: ident) =>
{
{
let mut mut_buffer;
mut_buffer = $buffer;
match $endianess
{
Endianess::BIG =>
{
BigEndian::$func(&mut mut_buffer, *$val);
}
Endianess::LITTLE =>
{
LittleEndian::$func(&mut mut_buffer, *$val);
}
Endianess::PLATFORM =>
{
PlatformEndian::$func(&mut mut_buffer, *$val);
}
}
}
}
}
macro_rules! handle_endianess_from_bytes
{
($buffer: ident, $endianess: ident, $func: ident) =>
{
match $endianess
{
Endianess::BIG =>
{
BigEndian::$func(&$buffer)
}
Endianess::LITTLE =>
{
LittleEndian::$func(&$buffer)
}
Endianess::PLATFORM =>
{
PlatformEndian::$func(&$buffer)
}
}
}
}
// From and Into are not used because we need to also
// know the endianess to use for converting.
/// A type that can be converted to and from bytes.
pub trait Transmutable
{
/// Converts an array of bytes to a signed 16-bit integer.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough information to convert.
fn bytes_to_i16(buffer: &[u8]) -> i16
{
Self::bytes_to_u16(buffer) as i16
}
/// Transmute this type to an array of bytes.
fn to_bytes(&self, buffer: &mut [u8], endianess: Endianess);
/// Converts an array of bytes to a signed 32-bit integer.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough information to convert.
fn bytes_to_i32(buffer: &[u8]) -> i32
{
Self::bytes_to_u32(buffer) as i32
}
/// Converts an array of bytes to a signed 64-bit integer.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough information to convert.
fn bytes_to_i64(buffer: &[u8]) -> i64
{
Self::bytes_to_u64(buffer) as i64
}
/// Converts an array of bytes to a signed integer.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough information to convert.
///
/// This will panic if the number of bytes
/// passed in is less than one or more than eight.
fn bytes_to_isize(buffer: &[u8]) -> isize
{
let temp_num: u64;
assert!(buffer.len() >= 1 && buffer.len() <= 8);
temp_num = Self::bytes_to_usize(buffer) as u64;
add_sign(temp_num, buffer.len() as u8) as isize
}
/// Converts an array of bytes to a 32-bit floating point number.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough information to convert.
fn bytes_to_f32(buffer: &[u8]) -> f32
{
unsafe
{
mem::transmute::<u32, f32>(Self::bytes_to_u32(buffer))
}
}
/// Converts an array of bytes to a 64-bit floating point number.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough information to convert.
fn bytes_to_f64(buffer: &[u8]) -> f64
{
unsafe
{
mem::transmute::<u64, f64>(Self::bytes_to_u64(buffer))
}
}
/// Converts a signed 16-bit integer to bytes
/// and places them into the given buffer.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough space to store the converted value.
fn i16_to_bytes(buffer: &mut [u8], num: i16)
{
Self::u16_to_bytes(buffer, num as u16)
}
/// Converts a signed 32-bit integer to bytes
/// and places them into the given buffer.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough space to store the converted value.
fn i32_to_bytes(buffer: &mut [u8], num: i32)
{
Self::u32_to_bytes(buffer, num as u32)
}
/// Converts a signed 64-bit integer to bytes
/// and places them into the given buffer.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough space to store the converted value.
fn i64_to_bytes(buffer: &mut [u8], num: i64)
{
Self::u64_to_bytes(buffer, num as u64)
}
/// Converts a signed integer to bytes
/// and places them into the given buffer.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough space to store the converted value.
///
/// This will panic if the number of bytes
/// passed in is less than the byte size of the given number
/// or more than eight.
fn isize_to_bytes(buffer: &mut [u8], num: isize)
{
let temp_num: usize;
assert!(buffer.len() >= 1 && buffer.len() <= 8);
temp_num = remove_sign(num as i64, buffer.len() as u8) as usize;
Self::usize_to_bytes(buffer, temp_num)
}
/// Converts a 32-bit floating point number to bytes
/// and places them into the given buffer.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough space to store the converted value.
fn f32_to_bytes(buffer: &mut [u8], num: f32)
{
unsafe
{
Self::u32_to_bytes(buffer, mem::transmute::<f32, u32>(num));
}
}
/// Converts a 64-bit floating point number to bytes
/// and places them into the given buffer.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough space to store the converted value.
fn f64_to_bytes(buffer: &mut [u8], num: f64)
{
unsafe
{
Self::u64_to_bytes(buffer, mem::transmute::<f64, u64>(num));
}
}
/// Converts an array of bytes to an unsigned 16-bit integer.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough information to convert.
fn bytes_to_u16(buffer: &[u8]) -> u16;
/// Converts an array of bytes to an unsigned 32-bit integer.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough information to convert.
fn bytes_to_u32(buffer: &[u8]) -> u32;
/// Converts an array of bytes to an unsigned 64-bit integer.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough information to convert.
fn bytes_to_u64(buffer: &[u8]) -> u64;
/// Converts an array of bytes to an unsigned integer.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough information to convert.
///
/// This will panic if the number of bytes
/// passed in is less than one or more than eight.
fn bytes_to_usize(buffer: &[u8]) -> usize;
/// Converts an unsigned 16-bit integer to bytes
/// and places them into the given buffer.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough space to store the converted value.
fn u16_to_bytes(buffer: &mut [u8], num: u16);
/// Converts an unsigned 32-bit integer to bytes
/// and places them into the given buffer.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough space to store the converted value.
fn u32_to_bytes(buffer: &mut [u8], num: u32);
/// Converts an unsigned 64-bit integer to bytes
/// and places them into the given buffer.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough space to store the converted value.
fn u64_to_bytes(buffer: &mut [u8], num: u64);
/// Converts an unsigned integer to bytes
/// and places them into the given buffer.
///
/// # Panics
/// This will panic if the buffer does not have
/// enough space to store the converted value.
///
/// This will panic if the number of bytes
/// passed in is less than the byte size of the given number
/// or more than eight.
fn usize_to_bytes(buffer: &mut [u8], num: usize);
/// Transmute an array of bytes to this type.
fn from_bytes(buffer: &[u8], endianess: Endianess) -> Self;
}
/// Switches an unsigned value into its signed equivalent.
///
/// NOTE: This seems messy for larger unsigned values.
fn add_sign(val: u64, num_bytes: u8) -> i64
impl Transmutable for u8
{
let shift: u8;
#[allow(unused_variables)]
fn to_bytes(&self, buffer: &mut [u8], endianess: Endianess)
{
// Make sure that there is enough space to store
// the bytes from this type.
assert!(buffer.len() >= u8::BYTES);
shift = (8 - num_bytes) * 8;
(val << shift) as i64 >> shift
// Convert this to bytes and add it to the buffer.
// Endianess doesn't matter here.
buffer[0] = *self;
}
#[allow(unused_variables)]
fn from_bytes(buffer: &[u8], endianess: Endianess) -> u8
{
// Make sure that there is enough data to read
// the bytes for this type.
assert!(buffer.len() >= u8::BYTES);
// Convert the given bytes to this type and return it.
// Endianess doesn't matter here.
buffer[0]
}
}
/// Switches a signed value into its unsigned equivalent.
///
/// NOTE: This seems messy for values under zero.
fn remove_sign(val: i64, num_bytes: u8) -> u64
impl Transmutable for u16
{
let shift: u8;
fn to_bytes(&self, buffer: &mut [u8], endianess: Endianess)
{
// Make sure that there is enough space to store
// the bytes from this type.
assert!(buffer.len() >= u16::BYTES);
shift = (8 - num_bytes) * 8;
(val << shift) as u64 >> shift
// Convert this to bytes and add it to the buffer.
handle_endianess_to_bytes!(buffer, self, endianess, u16_to_bytes);
}
fn from_bytes(buffer: &[u8], endianess: Endianess) -> u16
{
// Make sure that there is enough data to read
// the bytes for this type.
assert!(buffer.len() >= u16::BYTES);
// Convert the given bytes to this type and return is.
handle_endianess_from_bytes!(buffer, endianess, bytes_to_u16)
}
}
pub enum Endianess
impl Transmutable for u32
{
BIG,
LITTLE,
PLATFORM
fn to_bytes(&self, buffer: &mut [u8], endianess: Endianess)
{
// Make sure that there is enough space to store
// the bytes from this type.
assert!(buffer.len() >= u32::BYTES);
// Convert this to bytes and add it to the buffer.
handle_endianess_to_bytes!(buffer, self, endianess, u32_to_bytes);
}
fn from_bytes(buffer: &[u8], endianess: Endianess) -> u32
{
// Make sure that there is enough data to read
// the bytes for this type.
assert!(buffer.len() >= u32::BYTES);
// Convert the given bytes to this type and return is.
handle_endianess_from_bytes!(buffer, endianess, bytes_to_u32)
}
}
pub trait fff
impl Transmutable for u64
{
fn to_bytes(&self, buffer: &mut [u8]);
fn to_bytes(&self, buffer: &mut [u8], endianess: Endianess)
{
// Make sure that there is enough space to store
// the bytes from this type.
assert!(buffer.len() >= u64::BYTES);
fn from_bytes(buffer: &[u8]) -> Self;
// Convert this to bytes and add it to the buffer.
handle_endianess_to_bytes!(buffer, self, endianess, u64_to_bytes);
}
fn from_bytes(buffer: &[u8], endianess: Endianess) -> u64
{
// Make sure that there is enough data to read
// the bytes for this type.
assert!(buffer.len() >= u64::BYTES);
// Convert the given bytes to this type and return is.
handle_endianess_from_bytes!(buffer, endianess, bytes_to_u64)
}
}
impl Transmutable for usize
{
fn to_bytes(&self, buffer: &mut [u8], endianess: Endianess)
{
// Make sure that there is enough space to store
// the bytes from this type.
assert!(buffer.len() >= usize::BYTES);
// Convert this to bytes and add it to the buffer.
handle_endianess_to_bytes!(buffer, self, endianess, usize_to_bytes);
}
fn from_bytes(buffer: &[u8], endianess: Endianess) -> usize
{
// Make sure that there is enough data to read
// the bytes for this type.
assert!(buffer.len() >= usize::BYTES);
// Convert the given bytes to this type and return is.
handle_endianess_from_bytes!(buffer, endianess, bytes_to_usize)
}
}
impl Transmutable for i8
{
#[allow(unused_variables)]
fn to_bytes(&self, buffer: &mut [u8], endianess: Endianess)
{
// Make sure that there is enough space to store
// the bytes from this type.
assert!(buffer.len() >= i8::BYTES);
// Convert this to bytes and add it to the buffer.
buffer[0] = *self as u8;
}
#[allow(unused_variables)]
fn from_bytes(buffer: &[u8], endianess: Endianess) -> i8
{
// Make sure that there is enough data to read
// the bytes for this type.
assert!(buffer.len() >= i8::BYTES);
// Convert the given bytes to this type and return it.
// Endianess doesn't matter here.
buffer[0] as i8
}
}
impl Transmutable for i16
{
fn to_bytes(&self, buffer: &mut [u8], endianess: Endianess)
{
// Make sure that there is enough space to store
// the bytes from this type.
assert!(buffer.len() >= i16::BYTES);
// Convert this to bytes and add it to the buffer.
handle_endianess_to_bytes!(buffer, self, endianess, i16_to_bytes);
}
fn from_bytes(buffer: &[u8], endianess: Endianess) -> i16
{
// Make sure that there is enough data to read
// the bytes for this type.
assert!(buffer.len() >= i16::BYTES);
// Convert the given bytes to this type and return is.
handle_endianess_from_bytes!(buffer, endianess, bytes_to_i16)
}
}
impl Transmutable for i32
{
fn to_bytes(&self, buffer: &mut [u8], endianess: Endianess)
{
// Make sure that there is enough space to store
// the bytes from this type.
assert!(buffer.len() >= i32::BYTES);
// Convert this to bytes and add it to the buffer.
handle_endianess_to_bytes!(buffer, self, endianess, i32_to_bytes);
}
fn from_bytes(buffer: &[u8], endianess: Endianess) -> i32
{
// Make sure that there is enough data to read
// the bytes for this type.
assert!(buffer.len() >= i32::BYTES);
// Convert the given bytes to this type and return is.
handle_endianess_from_bytes!(buffer, endianess, bytes_to_i32)
}
}
impl Transmutable for i64
{
fn to_bytes(&self, buffer: &mut [u8], endianess: Endianess)
{
// Make sure that there is enough space to store
// the bytes from this type.
assert!(buffer.len() >= i64::BYTES);
// Convert this to bytes and add it to the buffer.
handle_endianess_to_bytes!(buffer, self, endianess, i64_to_bytes);
}
fn from_bytes(buffer: &[u8], endianess: Endianess) -> i64
{
// Make sure that there is enough data to read
// the bytes for this type.
assert!(buffer.len() >= i64::BYTES);
// Convert the given bytes to this type and return is.
handle_endianess_from_bytes!(buffer, endianess, bytes_to_i64)
}
}
impl Transmutable for isize
{
fn to_bytes(&self, buffer: &mut [u8], endianess: Endianess)
{
// Make sure that there is enough space to store
// the bytes from this type.
assert!(buffer.len() >= isize::BYTES);
// Convert this to bytes and add it to the buffer.
handle_endianess_to_bytes!(buffer, self, endianess, isize_to_bytes);
}
fn from_bytes(buffer: &[u8], endianess: Endianess) -> isize
{
// Make sure that there is enough data to read
// the bytes for this type.
assert!(buffer.len() >= isize::BYTES);
// Convert the given bytes to this type and return is.
handle_endianess_from_bytes!(buffer, endianess, bytes_to_isize)
}
}
impl Transmutable for f32
{
fn to_bytes(&self, buffer: &mut [u8], endianess: Endianess)
{
// Make sure that there is enough space to store
// the bytes from this type.
assert!(buffer.len() >= 4);
// Convert this to bytes and add it to the buffer.
handle_endianess_to_bytes!(buffer, self, endianess, f32_to_bytes);
}
fn from_bytes(buffer: &[u8], endianess: Endianess) -> f32
{
// Make sure that there is enough data to read
// the bytes for this type.
assert!(buffer.len() >= 4);
// Convert the given bytes to this type and return is.
handle_endianess_from_bytes!(buffer, endianess, bytes_to_f32)
}
}
impl Transmutable for f64
{
fn to_bytes(&self, buffer: &mut [u8], endianess: Endianess)
{
// Make sure that there is enough space to store
// the bytes from this type.
assert!(buffer.len() >= 8);
// Convert this to bytes and add it to the buffer.
handle_endianess_to_bytes!(buffer, self, endianess, f64_to_bytes);
}
fn from_bytes(buffer: &[u8], endianess: Endianess) -> f64
{
// Make sure that there is enough data to read
// the bytes for this type.
assert!(buffer.len() >= 8);
// Convert the given bytes to this type and return is.
handle_endianess_from_bytes!(buffer, endianess, bytes_to_f64)
}
}