62 lines
2.1 KiB
Rust
62 lines
2.1 KiB
Rust
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/// This example prints out the conversions for increasingly-large numbers, to
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/// showcase how the numbers change as the input gets bigger.
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/// It results in this:
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///
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/// ```text
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/// 1000 bytes is 1.000 kB and 1000 bytes
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/// 1000000 bytes is 1.000 MB and 976.562 KiB
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/// 1000000000 bytes is 1.000 GB and 953.674 MiB
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/// 1000000000000 bytes is 1.000 TB and 931.323 GiB
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/// 1000000000000000 bytes is 1.000 PB and 909.495 TiB
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/// 1000000000000000000 bytes is 1.000 EB and 888.178 PiB
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/// 1000000000000000000000 bytes is 1.000 ZB and 867.362 EiB
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/// 1000000000000000000000000 bytes is 1.000 YB and 847.033 ZiB
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///
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/// 1024 bytes is 1.000 KiB and 1.024 kB
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/// 1048576 bytes is 1.000 MiB and 1.049 MB
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/// 1073741824 bytes is 1.000 GiB and 1.074 GB
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/// 1099511627776 bytes is 1.000 TiB and 1.100 TB
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/// 1125899906842624 bytes is 1.000 PiB and 1.126 PB
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/// 1152921504606847000 bytes is 1.000 EiB and 1.153 EB
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/// 1180591620717411300000 bytes is 1.000 ZiB and 1.181 ZB
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/// 1208925819614629200000000 bytes is 1.000 YiB and 1.209 YB
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/// ```
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extern crate number_prefix;
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use number_prefix::NumberPrefix;
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use std::fmt::Display;
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fn main() {
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// part one, decimal prefixes
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let mut n = 1_f64;
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for _ in 0 .. 8 {
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n *= 1000_f64;
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let decimal = format_prefix(NumberPrefix::decimal(n));
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let binary = format_prefix(NumberPrefix::binary(n));
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println!("{:26} bytes is {} and {:10}", n, decimal, binary);
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}
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println!();
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// part two, binary prefixes
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let mut n = 1_f64;
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for _ in 0 .. 8 {
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n *= 1024_f64;
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let decimal = format_prefix(NumberPrefix::decimal(n));
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let binary = format_prefix(NumberPrefix::binary(n));
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println!("{:26} bytes is {} and {:10}", n, binary, decimal);
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}
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}
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fn format_prefix<T: Display>(np: NumberPrefix<T>) -> String {
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match np {
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NumberPrefix::Prefixed(prefix, n) => format!("{:.3} {}B", n, prefix),
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NumberPrefix::Standalone(bytes) => format!("{} bytes", bytes),
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}
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}
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