Description
The standard library provides a convenient method of converting numbers into strings, but these strings are heap-allocated. If you have an application which needs to convert large volumes of numbers into strings, but don't want to pay the price of heap allocation, this crate provides an efficient no_std-compatible method of heaplessly converting numbers into their string representations, storing the representation within a reusable byte array.
NumToA alternatives and similar packages
Based on the "Data structures" category.
Alternatively, view NumToA alternatives based on common mentions on social networks and blogs.
-
enum-map
An optimized map implementation for enums using an array to store values.
Collect and Analyze Billions of Data Points in Real Time
Do you think we are missing an alternative of NumToA or a related project?
README
NumToA
#![no_std]
Compatible with Zero Heap Allocations
The standard library provides a convenient method of converting numbers into strings, but these strings are
heap-allocated. If you have an application which needs to convert large volumes of numbers into strings, but don't
want to pay the price of heap allocation, this crate provides an efficient no_std
-compatible method of heaplessly converting numbers
into their string representations, storing the representation within a reusable byte array.
Supports Multiple Bases
In addition to supporting the standard base 10 conversion, this implementation allows you to select the base of your choice. Therefore, if you want a binary representation, set the base to 2. If you want hexadecimal, set the base to 16.
&str
Example
use numtoa::NumToA;
use std::io::{self, Write};
let mut buffer = [u8; 20];
println!("{}", 12345.numtoa_str(10, &mut buffer));
println!("{}", 256652.numtoa_str(10, &mut buffer));
&[u8]
Example
use numtoa::NumToA;
use std::io::{self, Write};
let stdout = io::stdout();
let mut stdout = stdout.lock();
let mut buffer = [0u8; 20];
let number: u32 = 162392;
let _ = stdout.write(number.numtoa(10, &mut buffer));
let _ = stdout.write(b"\n");
assert_eq!(number.numtoa(10, &mut buffer), b"162392");
let number: i32 = -6235;
let _ = stdout.write(number.numtoa(10, &mut buffer));
let _ = stdout.write(b"\n");
let number: i8 = -128;
let _ = stdout.write(number.numtoa(10, &mut buffer));
let _ = stdout.write(b"\n");
let number: i8 = 53;
let _ = stdout.write(number.numtoa(10, &mut buffer));
let _ = stdout.write(b"\n");
let number: i16 = -256;
let _ = stdout.write(number.numtoa(10, &mut buffer));
let _ = stdout.write(b"\n");
let number: i16 = -32768;
let _ = stdout.write(number.numtoa(10, &mut buffer));
let _ = stdout.write(b"\n");
let number: u64 = 35320842;
let _ = stdout.write(number.numtoa(10, &mut buffer));
let _ = stdout.write(b"\n");
let number: u64 = 18446744073709551615;
let _ = stdout.write(number.numtoa(10, &mut buffer));
let _ = stdout.write(b"\n");