This crate provides fast functions for printing integer primitives to an
io::Write. The
implementation comes straight from
libcore
but avoids the performance penalty of going through
fmt::Formatter.
See also dtoa for printing floating point
primitives.
```rust extern crate itoa;
// write to a vector or other io::Write let mut buf = Vec::new(); itoa::write(&mut buf, 128u64)?; println!("{:?}", buf);
// write to a stack buffer let mut bytes = [b'\0'; 20]; let n = itoa::write(&mut bytes[..], 128u64)?; println!("{:?}", &bytes[..n]); ```
The function signature is:
rust
fn write<W: io::Write, V: itoa::Integer>(writer: W, value: V) -> io::Result<usize>
where itoa::Integer is implemented for i8, u8, i16, u16, i32, u32,
i64, u64, i128, u128, isize and usize. 128-bit integer support is
only available with the nightly compiler when the i128 feature is enabled for
this crate. The return value gives the number of bytes written.
Itoa is available on crates.io. Use the
following in Cargo.toml:
toml
[dependencies]
itoa = "0.3"
Licensed under either of
at your option.
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in itoa by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.