Trait byteorder::WriteBytesExt
source · [−]pub trait WriteBytesExt: Write {
Show 20 methods
fn write_u8(&mut self, n: u8) -> Result<()> { ... }
fn write_i8(&mut self, n: i8) -> Result<()> { ... }
fn write_u16<T: ByteOrder>(&mut self, n: u16) -> Result<()> { ... }
fn write_i16<T: ByteOrder>(&mut self, n: i16) -> Result<()> { ... }
fn write_u24<T: ByteOrder>(&mut self, n: u32) -> Result<()> { ... }
fn write_i24<T: ByteOrder>(&mut self, n: i32) -> Result<()> { ... }
fn write_u32<T: ByteOrder>(&mut self, n: u32) -> Result<()> { ... }
fn write_i32<T: ByteOrder>(&mut self, n: i32) -> Result<()> { ... }
fn write_u48<T: ByteOrder>(&mut self, n: u64) -> Result<()> { ... }
fn write_i48<T: ByteOrder>(&mut self, n: i64) -> Result<()> { ... }
fn write_u64<T: ByteOrder>(&mut self, n: u64) -> Result<()> { ... }
fn write_i64<T: ByteOrder>(&mut self, n: i64) -> Result<()> { ... }
fn write_u128<T: ByteOrder>(&mut self, n: u128) -> Result<()> { ... }
fn write_i128<T: ByteOrder>(&mut self, n: i128) -> Result<()> { ... }
fn write_uint<T: ByteOrder>(&mut self, n: u64, nbytes: usize) -> Result<()> { ... }
fn write_int<T: ByteOrder>(&mut self, n: i64, nbytes: usize) -> Result<()> { ... }
fn write_uint128<T: ByteOrder>(
&mut self,
n: u128,
nbytes: usize
) -> Result<()> { ... }
fn write_int128<T: ByteOrder>(
&mut self,
n: i128,
nbytes: usize
) -> Result<()> { ... }
fn write_f32<T: ByteOrder>(&mut self, n: f32) -> Result<()> { ... }
fn write_f64<T: ByteOrder>(&mut self, n: f64) -> Result<()> { ... }
}Expand description
Extends Write with methods for writing numbers. (For std::io.)
Most of the methods defined here have an unconstrained type parameter that
must be explicitly instantiated. Typically, it is instantiated with either
the BigEndian or LittleEndian types defined in this crate.
Examples
Write unsigned 16 bit big-endian integers to a Write:
use byteorder::{BigEndian, WriteBytesExt};
let mut wtr = vec![];
wtr.write_u16::<BigEndian>(517).unwrap();
wtr.write_u16::<BigEndian>(768).unwrap();
assert_eq!(wtr, vec![2, 5, 3, 0]);Provided methods
Writes an unsigned 8 bit integer to the underlying writer.
Note that since this writes a single byte, no byte order conversions are used. It is included for completeness.
Errors
This method returns the same errors as Write::write_all.
Examples
Write unsigned 8 bit integers to a Write:
use byteorder::WriteBytesExt;
let mut wtr = Vec::new();
wtr.write_u8(2).unwrap();
wtr.write_u8(5).unwrap();
assert_eq!(wtr, b"\x02\x05");Writes a signed 8 bit integer to the underlying writer.
Note that since this writes a single byte, no byte order conversions are used. It is included for completeness.
Errors
This method returns the same errors as Write::write_all.
Examples
Write signed 8 bit integers to a Write:
use byteorder::WriteBytesExt;
let mut wtr = Vec::new();
wtr.write_i8(2).unwrap();
wtr.write_i8(-5).unwrap();
assert_eq!(wtr, b"\x02\xfb");Writes an unsigned 16 bit integer to the underlying writer.
Errors
This method returns the same errors as Write::write_all.
Examples
Write unsigned 16 bit big-endian integers to a Write:
use byteorder::{BigEndian, WriteBytesExt};
let mut wtr = Vec::new();
wtr.write_u16::<BigEndian>(517).unwrap();
wtr.write_u16::<BigEndian>(768).unwrap();
assert_eq!(wtr, b"\x02\x05\x03\x00");Writes a signed 16 bit integer to the underlying writer.
Errors
This method returns the same errors as Write::write_all.
Examples
Write signed 16 bit big-endian integers to a Write:
use byteorder::{BigEndian, WriteBytesExt};
let mut wtr = Vec::new();
wtr.write_i16::<BigEndian>(193).unwrap();
wtr.write_i16::<BigEndian>(-132).unwrap();
assert_eq!(wtr, b"\x00\xc1\xff\x7c");Writes an unsigned 24 bit integer to the underlying writer.
Errors
This method returns the same errors as Write::write_all.
Examples
Write unsigned 24 bit big-endian integers to a Write:
use byteorder::{BigEndian, WriteBytesExt};
let mut wtr = Vec::new();
wtr.write_u24::<BigEndian>(267).unwrap();
wtr.write_u24::<BigEndian>(120111).unwrap();
assert_eq!(wtr, b"\x00\x01\x0b\x01\xd5\x2f");Writes a signed 24 bit integer to the underlying writer.
Errors
This method returns the same errors as Write::write_all.
Examples
Write signed 24 bit big-endian integers to a Write:
use byteorder::{BigEndian, WriteBytesExt};
let mut wtr = Vec::new();
wtr.write_i24::<BigEndian>(-34253).unwrap();
wtr.write_i24::<BigEndian>(120111).unwrap();
assert_eq!(wtr, b"\xff\x7a\x33\x01\xd5\x2f");Writes an unsigned 32 bit integer to the underlying writer.
Errors
This method returns the same errors as Write::write_all.
Examples
Write unsigned 32 bit big-endian integers to a Write:
use byteorder::{BigEndian, WriteBytesExt};
let mut wtr = Vec::new();
wtr.write_u32::<BigEndian>(267).unwrap();
wtr.write_u32::<BigEndian>(1205419366).unwrap();
assert_eq!(wtr, b"\x00\x00\x01\x0b\x47\xd9\x3d\x66");Writes a signed 32 bit integer to the underlying writer.
Errors
This method returns the same errors as Write::write_all.
Examples
Write signed 32 bit big-endian integers to a Write:
use byteorder::{BigEndian, WriteBytesExt};
let mut wtr = Vec::new();
wtr.write_i32::<BigEndian>(-34253).unwrap();
wtr.write_i32::<BigEndian>(1205419366).unwrap();
assert_eq!(wtr, b"\xff\xff\x7a\x33\x47\xd9\x3d\x66");Writes an unsigned 48 bit integer to the underlying writer.
Errors
This method returns the same errors as Write::write_all.
Examples
Write unsigned 48 bit big-endian integers to a Write:
use byteorder::{BigEndian, WriteBytesExt};
let mut wtr = Vec::new();
wtr.write_u48::<BigEndian>(52360336390828).unwrap();
wtr.write_u48::<BigEndian>(541).unwrap();
assert_eq!(wtr, b"\x2f\x9f\x17\x40\x3a\xac\x00\x00\x00\x00\x02\x1d");Writes a signed 48 bit integer to the underlying writer.
Errors
This method returns the same errors as Write::write_all.
Examples
Write signed 48 bit big-endian integers to a Write:
use byteorder::{BigEndian, WriteBytesExt};
let mut wtr = Vec::new();
wtr.write_i48::<BigEndian>(-108363435763825).unwrap();
wtr.write_i48::<BigEndian>(77).unwrap();
assert_eq!(wtr, b"\x9d\x71\xab\xe7\x97\x8f\x00\x00\x00\x00\x00\x4d");Writes an unsigned 64 bit integer to the underlying writer.
Errors
This method returns the same errors as Write::write_all.
Examples
Write unsigned 64 bit big-endian integers to a Write:
use byteorder::{BigEndian, WriteBytesExt};
let mut wtr = Vec::new();
wtr.write_u64::<BigEndian>(918733457491587).unwrap();
wtr.write_u64::<BigEndian>(143).unwrap();
assert_eq!(wtr, b"\x00\x03\x43\x95\x4d\x60\x86\x83\x00\x00\x00\x00\x00\x00\x00\x8f");Writes a signed 64 bit integer to the underlying writer.
Errors
This method returns the same errors as Write::write_all.
Examples
Write signed 64 bit big-endian integers to a Write:
use byteorder::{BigEndian, WriteBytesExt};
let mut wtr = Vec::new();
wtr.write_i64::<BigEndian>(i64::min_value()).unwrap();
wtr.write_i64::<BigEndian>(i64::max_value()).unwrap();
assert_eq!(wtr, b"\x80\x00\x00\x00\x00\x00\x00\x00\x7f\xff\xff\xff\xff\xff\xff\xff");Writes an unsigned 128 bit integer to the underlying writer.
Writes a signed 128 bit integer to the underlying writer.
Writes an unsigned n-bytes integer to the underlying writer.
Errors
This method returns the same errors as Write::write_all.
Panics
If the given integer is not representable in the given number of bytes,
this method panics. If nbytes > 8, this method panics.
Examples
Write unsigned 40 bit big-endian integers to a Write:
use byteorder::{BigEndian, WriteBytesExt};
let mut wtr = Vec::new();
wtr.write_uint::<BigEndian>(312550384361, 5).unwrap();
wtr.write_uint::<BigEndian>(43, 5).unwrap();
assert_eq!(wtr, b"\x48\xc5\x74\x62\xe9\x00\x00\x00\x00\x2b");Writes a signed n-bytes integer to the underlying writer.
Errors
This method returns the same errors as Write::write_all.
Panics
If the given integer is not representable in the given number of bytes,
this method panics. If nbytes > 8, this method panics.
Examples
Write signed 56 bit big-endian integers to a Write:
use byteorder::{BigEndian, WriteBytesExt};
let mut wtr = Vec::new();
wtr.write_int::<BigEndian>(-3548172039376767, 7).unwrap();
wtr.write_int::<BigEndian>(43, 7).unwrap();
assert_eq!(wtr, b"\xf3\x64\xf4\xd1\xfd\xb0\x81\x00\x00\x00\x00\x00\x00\x2b");Writes an unsigned n-bytes integer to the underlying writer.
If the given integer is not representable in the given number of bytes,
this method panics. If nbytes > 16, this method panics.
Writes a signed n-bytes integer to the underlying writer.
If the given integer is not representable in the given number of bytes,
this method panics. If nbytes > 16, this method panics.
Writes a IEEE754 single-precision (4 bytes) floating point number to the underlying writer.
Errors
This method returns the same errors as Write::write_all.
Examples
Write a big-endian single-precision floating point number to a Write:
use std::f32;
use byteorder::{BigEndian, WriteBytesExt};
let mut wtr = Vec::new();
wtr.write_f32::<BigEndian>(f32::consts::PI).unwrap();
assert_eq!(wtr, b"\x40\x49\x0f\xdb");Writes a IEEE754 double-precision (8 bytes) floating point number to the underlying writer.
Errors
This method returns the same errors as Write::write_all.
Examples
Write a big-endian double-precision floating point number to a Write:
use std::f64;
use byteorder::{BigEndian, WriteBytesExt};
let mut wtr = Vec::new();
wtr.write_f64::<BigEndian>(f64::consts::PI).unwrap();
assert_eq!(wtr, b"\x40\x09\x21\xfb\x54\x44\x2d\x18");Implementors
All types that implement Write get methods defined in WriteBytesExt
for free.