Trait bytes::ByteOrder
[−]
[src]
pub trait ByteOrder: Sealed + Copy + PartialEq<Self> + Eq + Ord + PartialOrd<Self> + Clone + Default + Hash + Debug { fn read_u16(buf: &[u8]) -> u16; fn read_u32(buf: &[u8]) -> u32; fn read_u64(buf: &[u8]) -> u64; fn read_uint(buf: &[u8], nbytes: usize) -> u64; fn write_u16(buf: &mut [u8], n: u16); fn write_u32(buf: &mut [u8], n: u32); fn write_u64(buf: &mut [u8], n: u64); fn write_uint(buf: &mut [u8], n: u64, nbytes: usize); fn read_u16_into(src: &[u8], dst: &mut [u16]); fn read_u32_into(src: &[u8], dst: &mut [u32]); fn read_u64_into(src: &[u8], dst: &mut [u64]); fn write_u16_into(src: &[u16], dst: &mut [u8]); fn write_u32_into(src: &[u32], dst: &mut [u8]); fn write_u64_into(src: &[u64], dst: &mut [u8]); fn from_slice_u16(numbers: &mut [u16]); fn from_slice_u32(numbers: &mut [u32]); fn from_slice_u64(numbers: &mut [u64]); fn from_slice_f32(numbers: &mut [f32]); fn from_slice_f64(numbers: &mut [f64]); fn read_u24(buf: &[u8]) -> u32 { ... } fn write_u24(buf: &mut [u8], n: u32) { ... } fn read_i16(buf: &[u8]) -> i16 { ... } fn read_i24(buf: &[u8]) -> i32 { ... } fn read_i32(buf: &[u8]) -> i32 { ... } fn read_i64(buf: &[u8]) -> i64 { ... } fn read_int(buf: &[u8], nbytes: usize) -> i64 { ... } fn read_f32(buf: &[u8]) -> f32 { ... } fn read_f64(buf: &[u8]) -> f64 { ... } fn write_i16(buf: &mut [u8], n: i16) { ... } fn write_i24(buf: &mut [u8], n: i32) { ... } fn write_i32(buf: &mut [u8], n: i32) { ... } fn write_i64(buf: &mut [u8], n: i64) { ... } fn write_int(buf: &mut [u8], n: i64, nbytes: usize) { ... } fn write_f32(buf: &mut [u8], n: f32) { ... } fn write_f64(buf: &mut [u8], n: f64) { ... } fn read_i16_into(src: &[u8], dst: &mut [i16]) { ... } fn read_i32_into(src: &[u8], dst: &mut [i32]) { ... } fn read_i64_into(src: &[u8], dst: &mut [i64]) { ... } unsafe fn read_f32_into_unchecked(src: &[u8], dst: &mut [f32]) { ... } unsafe fn read_f64_into_unchecked(src: &[u8], dst: &mut [f64]) { ... } fn write_i16_into(src: &[i16], dst: &mut [u8]) { ... } fn write_i32_into(src: &[i32], dst: &mut [u8]) { ... } fn write_i64_into(src: &[i64], dst: &mut [u8]) { ... } fn write_f32_into(src: &[f32], dst: &mut [u8]) { ... } fn write_f64_into(src: &[f64], dst: &mut [u8]) { ... } fn from_slice_i16(numbers: &mut [i16]) { ... } fn from_slice_i32(numbers: &mut [i32]) { ... } fn from_slice_i64(numbers: &mut [i64]) { ... } }
ByteOrder describes types that can serialize integers as bytes.
Note that Self
does not appear anywhere in this trait's definition!
Therefore, in order to use it, you'll need to use syntax like
T::read_u16(&[0, 1])
where T
implements ByteOrder
.
This crate provides two types that implement ByteOrder
: BigEndian
and LittleEndian
.
This trait is sealed and cannot be implemented for callers to avoid
breaking backwards compatibility when adding new derived traits.
Examples
Write and read u32
numbers in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let mut buf = [0; 4]; LittleEndian::write_u32(&mut buf, 1_000_000); assert_eq!(1_000_000, LittleEndian::read_u32(&buf));
Write and read i16
numbers in big endian order:
use byteorder::{ByteOrder, BigEndian}; let mut buf = [0; 2]; BigEndian::write_i16(&mut buf, -50_000); assert_eq!(-50_000, BigEndian::read_i16(&buf));
Required Methods
fn read_u16(buf: &[u8]) -> u16
fn read_u32(buf: &[u8]) -> u32
Reads an unsigned 32 bit integer from buf
.
Panics
Panics when buf.len() < 4
.
Examples
Write and read u32
numbers in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let mut buf = [0; 4]; LittleEndian::write_u32(&mut buf, 1_000_000); assert_eq!(1_000_000, LittleEndian::read_u32(&buf));
fn read_u64(buf: &[u8]) -> u64
Reads an unsigned 64 bit integer from buf
.
Panics
Panics when buf.len() < 8
.
Examples
Write and read u64
numbers in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let mut buf = [0; 8]; LittleEndian::write_u64(&mut buf, 1_000_000); assert_eq!(1_000_000, LittleEndian::read_u64(&buf));
fn read_uint(buf: &[u8], nbytes: usize) -> u64
Reads an unsigned n-bytes integer from buf
.
Panics
Panics when nbytes < 1
or nbytes > 8
or
buf.len() < nbytes
Examples
Write and read an n-byte number in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let mut buf = [0; 3]; LittleEndian::write_uint(&mut buf, 1_000_000, 3); assert_eq!(1_000_000, LittleEndian::read_uint(&buf, 3));
fn write_u16(buf: &mut [u8], n: u16)
Writes an unsigned 16 bit integer n
to buf
.
Panics
Panics when buf.len() < 2
.
Examples
Write and read u16
numbers in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let mut buf = [0; 2]; LittleEndian::write_u16(&mut buf, 1_000_000); assert_eq!(1_000_000, LittleEndian::read_u16(&buf));
fn write_u32(buf: &mut [u8], n: u32)
Writes an unsigned 32 bit integer n
to buf
.
Panics
Panics when buf.len() < 4
.
Examples
Write and read u32
numbers in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let mut buf = [0; 4]; LittleEndian::write_u32(&mut buf, 1_000_000); assert_eq!(1_000_000, LittleEndian::read_u32(&buf));
fn write_u64(buf: &mut [u8], n: u64)
Writes an unsigned 64 bit integer n
to buf
.
Panics
Panics when buf.len() < 8
.
Examples
Write and read u64
numbers in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let mut buf = [0; 8]; LittleEndian::write_u64(&mut buf, 1_000_000); assert_eq!(1_000_000, LittleEndian::read_u64(&buf));
fn write_uint(buf: &mut [u8], n: u64, nbytes: usize)
Writes an unsigned integer n
to buf
using only nbytes
.
Panics
If n
is not representable in nbytes
, or if nbytes
is > 8
, then
this method panics.
Examples
Write and read an n-byte number in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let mut buf = [0; 3]; LittleEndian::write_uint(&mut buf, 1_000_000, 3); assert_eq!(1_000_000, LittleEndian::read_uint(&buf, 3));
fn read_u16_into(src: &[u8], dst: &mut [u16])
Reads unsigned 16 bit integers from src
into dst
.
Panics
Panics when src.len() != 2*dst.len()
.
Examples
Write and read u16
numbers in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let mut bytes = [0; 8]; let numbers_given = [1, 2, 0xf00f, 0xffee]; LittleEndian::write_u16_into(&numbers_given, &mut bytes); let mut numbers_got = [0; 4]; LittleEndian::read_u16_into(&bytes, &mut numbers_got); assert_eq!(numbers_given, numbers_got);
fn read_u32_into(src: &[u8], dst: &mut [u32])
Reads unsigned 32 bit integers from src
into dst
.
Panics
Panics when src.len() != 4*dst.len()
.
Examples
Write and read u32
numbers in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let mut bytes = [0; 16]; let numbers_given = [1, 2, 0xf00f, 0xffee]; LittleEndian::write_u32_into(&numbers_given, &mut bytes); let mut numbers_got = [0; 4]; LittleEndian::read_u32_into(&bytes, &mut numbers_got); assert_eq!(numbers_given, numbers_got);
fn read_u64_into(src: &[u8], dst: &mut [u64])
Reads unsigned 64 bit integers from src
into dst
.
Panics
Panics when src.len() != 8*dst.len()
.
Examples
Write and read u64
numbers in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let mut bytes = [0; 32]; let numbers_given = [1, 2, 0xf00f, 0xffee]; LittleEndian::write_u64_into(&numbers_given, &mut bytes); let mut numbers_got = [0; 4]; LittleEndian::read_u64_into(&bytes, &mut numbers_got); assert_eq!(numbers_given, numbers_got);
fn write_u16_into(src: &[u16], dst: &mut [u8])
Writes unsigned 16 bit integers from src
into dst
.
Panics
Panics when dst.len() != 2*src.len()
.
Examples
Write and read u16
numbers in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let mut bytes = [0; 8]; let numbers_given = [1, 2, 0xf00f, 0xffee]; LittleEndian::write_u16_into(&numbers_given, &mut bytes); let mut numbers_got = [0; 4]; LittleEndian::read_u16_into(&bytes, &mut numbers_got); assert_eq!(numbers_given, numbers_got);
fn write_u32_into(src: &[u32], dst: &mut [u8])
Writes unsigned 32 bit integers from src
into dst
.
Panics
Panics when dst.len() != 4*src.len()
.
Examples
Write and read u32
numbers in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let mut bytes = [0; 16]; let numbers_given = [1, 2, 0xf00f, 0xffee]; LittleEndian::write_u32_into(&numbers_given, &mut bytes); let mut numbers_got = [0; 4]; LittleEndian::read_u32_into(&bytes, &mut numbers_got); assert_eq!(numbers_given, numbers_got);
fn write_u64_into(src: &[u64], dst: &mut [u8])
Writes unsigned 64 bit integers from src
into dst
.
Panics
Panics when dst.len() != 8*src.len()
.
Examples
Write and read u64
numbers in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let mut bytes = [0; 32]; let numbers_given = [1, 2, 0xf00f, 0xffee]; LittleEndian::write_u64_into(&numbers_given, &mut bytes); let mut numbers_got = [0; 4]; LittleEndian::read_u64_into(&bytes, &mut numbers_got); assert_eq!(numbers_given, numbers_got);
fn from_slice_u16(numbers: &mut [u16])
Converts the given slice of unsigned 16 bit integers to a particular endianness.
If the endianness matches the endianness of the host platform, then this is a no-op.
Examples
Convert the host platform's endianness to big-endian:
use byteorder::{ByteOrder, BigEndian}; let mut numbers = [5, 65000]; BigEndian::from_slice_u16(&mut numbers); if cfg!(target_endian = "little") { assert_eq!(numbers, [5u16.swap_bytes(), 65000u16.swap_bytes()]); } else { assert_eq!(numbers, [5, 65000]); }
fn from_slice_u32(numbers: &mut [u32])
Converts the given slice of unsigned 32 bit integers to a particular endianness.
If the endianness matches the endianness of the host platform, then this is a no-op.
Examples
Convert the host platform's endianness to big-endian:
use byteorder::{ByteOrder, BigEndian}; let mut numbers = [5, 65000]; BigEndian::from_slice_u32(&mut numbers); if cfg!(target_endian = "little") { assert_eq!(numbers, [5u32.swap_bytes(), 65000u32.swap_bytes()]); } else { assert_eq!(numbers, [5, 65000]); }
fn from_slice_u64(numbers: &mut [u64])
Converts the given slice of unsigned 64 bit integers to a particular endianness.
If the endianness matches the endianness of the host platform, then this is a no-op.
Examples
Convert the host platform's endianness to big-endian:
use byteorder::{ByteOrder, BigEndian}; let mut numbers = [5, 65000]; BigEndian::from_slice_u64(&mut numbers); if cfg!(target_endian = "little") { assert_eq!(numbers, [5u64.swap_bytes(), 65000u64.swap_bytes()]); } else { assert_eq!(numbers, [5, 65000]); }
fn from_slice_f32(numbers: &mut [f32])
Converts the given slice of IEEE754 single-precision (4 bytes) floating point numbers to a particular endianness.
If the endianness matches the endianness of the host platform, then this is a no-op.
Note that the results of this operation are guaranteed to be defined. In particular, this method may replace signaling NaN values with quiet NaN values.
fn from_slice_f64(numbers: &mut [f64])
Converts the given slice of IEEE754 double-precision (8 bytes) floating point numbers to a particular endianness.
If the endianness matches the endianness of the host platform, then this is a no-op.
Note that the results of this operation are guaranteed to be defined. In particular, this method may replace signaling NaN values with quiet NaN values.
Provided Methods
fn read_u24(buf: &[u8]) -> u32
Reads an unsigned 24 bit integer from buf
, stored in u32.
Panics
Panics when buf.len() < 3
.
Examples
Write and read 24 bit u32
numbers in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let mut buf = [0; 3]; LittleEndian::write_u24(&mut buf, 1_000_000); assert_eq!(1_000_000, LittleEndian::read_u24(&buf));
fn write_u24(buf: &mut [u8], n: u32)
Writes an unsigned 24 bit integer n
to buf
, stored in u32.
Panics
Panics when buf.len() < 3
.
Examples
Write and read 24 bit u32
numbers in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let mut buf = [0; 3]; LittleEndian::write_u24(&mut buf, 1_000_000); assert_eq!(1_000_000, LittleEndian::read_u24(&buf));
fn read_i16(buf: &[u8]) -> i16
Reads a signed 16 bit integer from buf
.
Panics
Panics when buf.len() < 2
.
Examples
Write and read i16
numbers in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let mut buf = [0; 2]; LittleEndian::write_i16(&mut buf, -1_000); assert_eq!(-1_000, LittleEndian::read_i16(&buf));
fn read_i24(buf: &[u8]) -> i32
Reads a signed 24 bit integer from buf
, stored in i32.
Panics
Panics when buf.len() < 3
.
Examples
Write and read 24 bit i32
numbers in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let mut buf = [0; 3]; LittleEndian::write_i24(&mut buf, -1_000_000); assert_eq!(-1_000_000, LittleEndian::read_i24(&buf));
fn read_i32(buf: &[u8]) -> i32
Reads a signed 32 bit integer from buf
.
Panics
Panics when buf.len() < 4
.
Examples
Write and read i32
numbers in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let mut buf = [0; 4]; LittleEndian::write_i32(&mut buf, -1_000_000); assert_eq!(-1_000_000, LittleEndian::read_i32(&buf));
fn read_i64(buf: &[u8]) -> i64
Reads a signed 64 bit integer from buf
.
Panics
Panics when buf.len() < 8
.
Examples
Write and read i64
numbers in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let mut buf = [0; 8]; LittleEndian::write_i64(&mut buf, -1_000_000_000); assert_eq!(-1_000_000_000, LittleEndian::read_i64(&buf));
fn read_int(buf: &[u8], nbytes: usize) -> i64
Reads a signed n-bytes integer from buf
.
Panics
Panics when nbytes < 1
or nbytes > 8
or
buf.len() < nbytes
Examples
Write and read n-length signed numbers in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let mut buf = [0; 3]; LittleEndian::write_int(&mut buf, -1_000, 3); assert_eq!(-1_000, LittleEndian::read_int(&buf, 3));
fn read_f32(buf: &[u8]) -> f32
Reads a IEEE754 single-precision (4 bytes) floating point number.
The return value is always defined; signaling NaN's may be turned into quiet NaN's.
Panics
Panics when buf.len() < 4
.
Examples
Write and read f32
numbers in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let e = 2.71828; let mut buf = [0; 4]; LittleEndian::write_f32(&mut buf, e); assert_eq!(e, LittleEndian::read_f32(&buf));
fn read_f64(buf: &[u8]) -> f64
Reads a IEEE754 double-precision (8 bytes) floating point number.
The return value is always defined; signaling NaN's may be turned into quiet NaN's.
Panics
Panics when buf.len() < 8
.
Examples
Write and read f64
numbers in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let phi = 1.6180339887; let mut buf = [0; 8]; LittleEndian::write_f64(&mut buf, phi); assert_eq!(phi, LittleEndian::read_f64(&buf));
fn write_i16(buf: &mut [u8], n: i16)
Writes a signed 16 bit integer n
to buf
.
Panics
Panics when buf.len() < 2
.
Examples
Write and read i16
numbers in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let mut buf = [0; 2]; LittleEndian::write_i16(&mut buf, -1_000); assert_eq!(-1_000, LittleEndian::read_i16(&buf));
fn write_i24(buf: &mut [u8], n: i32)
Writes a signed 24 bit integer n
to buf
, stored in i32.
Panics
Panics when buf.len() < 3
.
Examples
Write and read 24 bit i32
numbers in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let mut buf = [0; 3]; LittleEndian::write_i24(&mut buf, -1_000_000); assert_eq!(-1_000_000, LittleEndian::read_i24(&buf));
fn write_i32(buf: &mut [u8], n: i32)
Writes a signed 32 bit integer n
to buf
.
Panics
Panics when buf.len() < 4
.
Examples
Write and read i32
numbers in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let mut buf = [0; 4]; LittleEndian::write_i32(&mut buf, -1_000_000); assert_eq!(-1_000_000, LittleEndian::read_i32(&buf));
fn write_i64(buf: &mut [u8], n: i64)
Writes a signed 64 bit integer n
to buf
.
Panics
Panics when buf.len() < 8
.
Examples
Write and read i64
numbers in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let mut buf = [0; 8]; LittleEndian::write_i64(&mut buf, -1_000_000_000); assert_eq!(-1_000_000_000, LittleEndian::read_i64(&buf));
fn write_int(buf: &mut [u8], n: i64, nbytes: usize)
Writes a signed integer n
to buf
using only nbytes
.
Panics
If n
is not representable in nbytes
, or if nbytes
is > 8
, then
this method panics.
Examples
Write and read an n-byte number in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let mut buf = [0; 3]; LittleEndian::write_int(&mut buf, -1_000, 3); assert_eq!(-1_000, LittleEndian::read_int(&buf, 3));
fn write_f32(buf: &mut [u8], n: f32)
Writes a IEEE754 single-precision (4 bytes) floating point number.
Panics
Panics when buf.len() < 4
.
Examples
Write and read f32
numbers in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let e = 2.71828; let mut buf = [0; 4]; LittleEndian::write_f32(&mut buf, e); assert_eq!(e, LittleEndian::read_f32(&buf));
fn write_f64(buf: &mut [u8], n: f64)
Writes a IEEE754 double-precision (8 bytes) floating point number.
Panics
Panics when buf.len() < 8
.
Examples
Write and read f64
numbers in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let phi = 1.6180339887; let mut buf = [0; 8]; LittleEndian::write_f64(&mut buf, phi); assert_eq!(phi, LittleEndian::read_f64(&buf));
fn read_i16_into(src: &[u8], dst: &mut [i16])
Reads signed 16 bit integers from src
to dst
.
Panics
Panics when buf.len() != 2*dst.len()
.
Examples
Write and read i16
numbers in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let mut bytes = [0; 8]; let numbers_given = [1, 2, 0xf00f, 0xffee]; LittleEndian::write_i16_into(&numbers_given, &mut bytes); let mut numbers_got = [0; 4]; LittleEndian::read_i16_into(&bytes, &mut numbers_got); assert_eq!(numbers_given, numbers_got);
fn read_i32_into(src: &[u8], dst: &mut [i32])
Reads signed 32 bit integers from src
into dst
.
Panics
Panics when src.len() != 4*dst.len()
.
Examples
Write and read i32
numbers in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let mut bytes = [0; 16]; let numbers_given = [1, 2, 0xf00f, 0xffee]; LittleEndian::write_i32_into(&numbers_given, &mut bytes); let mut numbers_got = [0; 4]; LittleEndian::read_i32_into(&bytes, &mut numbers_got); assert_eq!(numbers_given, numbers_got);
fn read_i64_into(src: &[u8], dst: &mut [i64])
Reads signed 64 bit integers from src
into dst
.
Panics
Panics when src.len() != 8*dst.len()
.
Examples
Write and read i64
numbers in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let mut bytes = [0; 32]; let numbers_given = [1, 2, 0xf00f, 0xffee]; LittleEndian::write_i64_into(&numbers_given, &mut bytes); let mut numbers_got = [0; 4]; LittleEndian::read_i64_into(&bytes, &mut numbers_got); assert_eq!(numbers_given, numbers_got);
unsafe fn read_f32_into_unchecked(src: &[u8], dst: &mut [f32])
Reads IEEE754 single-precision (4 bytes) floating point numbers from
src
into dst
.
Note that this does not perform any checks on the floating point
conversion. In particular, if the src
data encodes an undefined
floating point value for your environment, then the result may be
undefined behavior. For example, this function may produce signaling
NaN floating point values.
Panics
Panics when src.len() != 4*dst.len()
.
Examples
Write and read f32
numbers in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let mut bytes = [0; 16]; let numbers_given = [1.0, 2.0, 31.312e311, -11.32e91]; LittleEndian::write_f32_into(&numbers_given, &mut bytes); let mut numbers_got = [0.0; 4]; unsafe { LittleEndian::read_f32_into_unchecked(&bytes, &mut numbers_got); } assert_eq!(numbers_given, numbers_got);
unsafe fn read_f64_into_unchecked(src: &[u8], dst: &mut [f64])
Reads IEEE754 single-precision (4 bytes) floating point numbers from
src
into dst
.
Note that this does not perform any checks on the floating point
conversion. In particular, if the src
data encodes an undefined
floating point value for your environment, then the result may be
undefined behavior. For example, this function may produce signaling
NaN floating point values.
Panics
Panics when src.len() != 8*dst.len()
.
Examples
Write and read f64
numbers in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let mut bytes = [0; 32]; let numbers_given = [1.0, 2.0, 31.312e311, -11.32e91]; LittleEndian::write_f64_into(&numbers_given, &mut bytes); let mut numbers_got = [0.0; 4]; unsafe { LittleEndian::read_f64_into_unchecked(&bytes, &mut numbers_got); } assert_eq!(numbers_given, numbers_got);
fn write_i16_into(src: &[i16], dst: &mut [u8])
Writes signed 16 bit integers from src
into dst
.
Panics
Panics when buf.len() != 2*src.len()
.
Examples
Write and read i16
numbers in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let mut bytes = [0; 8]; let numbers_given = [1, 2, 0xf00f, 0xffee]; LittleEndian::write_i16_into(&numbers_given, &mut bytes); let mut numbers_got = [0; 4]; LittleEndian::read_i16_into(&bytes, &mut numbers_got); assert_eq!(numbers_given, numbers_got);
fn write_i32_into(src: &[i32], dst: &mut [u8])
Writes signed 32 bit integers from src
into dst
.
Panics
Panics when dst.len() != 4*src.len()
.
Examples
Write and read i32
numbers in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let mut bytes = [0; 16]; let numbers_given = [1, 2, 0xf00f, 0xffee]; LittleEndian::write_i32_into(&numbers_given, &mut bytes); let mut numbers_got = [0; 4]; LittleEndian::read_i32_into(&bytes, &mut numbers_got); assert_eq!(numbers_given, numbers_got);
fn write_i64_into(src: &[i64], dst: &mut [u8])
Writes signed 64 bit integers from src
into dst
.
Panics
Panics when dst.len() != 8*src.len()
.
Examples
Write and read i64
numbers in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let mut bytes = [0; 32]; let numbers_given = [1, 2, 0xf00f, 0xffee]; LittleEndian::write_i64_into(&numbers_given, &mut bytes); let mut numbers_got = [0; 4]; LittleEndian::read_i64_into(&bytes, &mut numbers_got); assert_eq!(numbers_given, numbers_got);
fn write_f32_into(src: &[f32], dst: &mut [u8])
Writes IEEE754 single-precision (4 bytes) floating point numbers from
src
into dst
.
Panics
Panics when src.len() != 4*dst.len()
.
Examples
Write and read f32
numbers in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let mut bytes = [0; 16]; let numbers_given = [1.0, 2.0, 31.312e311, -11.32e91]; LittleEndian::write_f32_into(&numbers_given, &mut bytes); let mut numbers_got = [0.0; 4]; unsafe { LittleEndian::read_f32_into_unchecked(&bytes, &mut numbers_got); } assert_eq!(numbers_given, numbers_got);
fn write_f64_into(src: &[f64], dst: &mut [u8])
Writes IEEE754 double-precision (8 bytes) floating point numbers from
src
into dst
.
Panics
Panics when src.len() != 8*dst.len()
.
Examples
Write and read f64
numbers in little endian order:
use byteorder::{ByteOrder, LittleEndian}; let mut bytes = [0; 32]; let numbers_given = [1.0, 2.0, 31.312e311, -11.32e91]; LittleEndian::write_f64_into(&numbers_given, &mut bytes); let mut numbers_got = [0.0; 4]; unsafe { LittleEndian::read_f64_into_unchecked(&bytes, &mut numbers_got); } assert_eq!(numbers_given, numbers_got);
fn from_slice_i16(numbers: &mut [i16])
Converts the given slice of signed 16 bit integers to a particular endianness.
If the endianness matches the endianness of the host platform, then this is a no-op.
Examples
Convert the host platform's endianness to big-endian:
use byteorder::{ByteOrder, BigEndian}; let mut numbers = [5, 65000]; BigEndian::from_slice_i16(&mut numbers); if cfg!(target_endian = "little") { assert_eq!(numbers, [5i16.swap_bytes(), 65000i16.swap_bytes()]); } else { assert_eq!(numbers, [5, 65000]); }
fn from_slice_i32(numbers: &mut [i32])
Converts the given slice of signed 32 bit integers to a particular endianness.
If the endianness matches the endianness of the host platform, then this is a no-op.
Examples
Convert the host platform's endianness to big-endian:
use byteorder::{ByteOrder, BigEndian}; let mut numbers = [5, 65000]; BigEndian::from_slice_i32(&mut numbers); if cfg!(target_endian = "little") { assert_eq!(numbers, [5i32.swap_bytes(), 65000i32.swap_bytes()]); } else { assert_eq!(numbers, [5, 65000]); }
fn from_slice_i64(numbers: &mut [i64])
Converts the given slice of signed 64 bit integers to a particular endianness.
If the endianness matches the endianness of the host platform, then this is a no-op.
Examples
Convert the host platform's endianness to big-endian:
use byteorder::{ByteOrder, BigEndian}; let mut numbers = [5, 65000]; BigEndian::from_slice_i64(&mut numbers); if cfg!(target_endian = "little") { assert_eq!(numbers, [5i64.swap_bytes(), 65000i64.swap_bytes()]); } else { assert_eq!(numbers, [5, 65000]); }
Implementors
impl ByteOrder for BigEndian
impl ByteOrder for LittleEndian