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// -*- coding: utf-8 -*-
//
// disktest - Hard drive tester
//
// Copyright 2020 Michael Buesch <m@bues.ch>
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
const EIB: u64 = 1024 * 1024 * 1024 * 1024 * 1024 * 1024;
const PIB: u64 = 1024 * 1024 * 1024 * 1024 * 1024;
const TIB: u64 = 1024 * 1024 * 1024 * 1024;
const GIB: u64 = 1024 * 1024 * 1024;
const MIB: u64 = 1024 * 1024;
const KIB: u64 = 1024;
const EIBM1: u64 = EIB - 1;
const PIBM1: u64 = PIB - 1;
const TIBM1: u64 = TIB - 1;
const GIBM1: u64 = GIB - 1;
const MIBM1: u64 = MIB - 1;
//const KIBM1: u64 = KIB - 1;
const EB: u64 = 1000 * 1000 * 1000 * 1000 * 1000 * 1000;
const PB: u64 = 1000 * 1000 * 1000 * 1000 * 1000;
const TB: u64 = 1000 * 1000 * 1000 * 1000;
const GB: u64 = 1000 * 1000 * 1000;
const MB: u64 = 1000 * 1000;
const KB: u64 = 1000;
const EBM1: u64 = EB - 1;
const PBM1: u64 = PB - 1;
const TBM1: u64 = TB - 1;
const GBM1: u64 = GB - 1;
const MBM1: u64 = MB - 1;
//const KBM1: u64 = KB - 1;
pub fn prettybytes(count: u64, binary: bool, decimal: bool) -> String {
let mut ret = String::new();
if binary || decimal {
if count < KIB {
ret.push_str(&format!("{} bytes", count))
} else {
let bin = match count {
EIB..=u64::MAX => format!("{:.4} EiB", ((count / TIB) as f64) / (MIB as f64)),
PIB..=EIBM1 => format!("{:.4} PiB", ((count / GIB) as f64) / (MIB as f64)),
TIB..=PIBM1 => format!("{:.4} TiB", ((count / MIB) as f64) / (MIB as f64)),
GIB..=TIBM1 => format!("{:.2} GiB", ((count / MIB) as f64) / (KIB as f64)),
MIB..=GIBM1 => format!("{:.1} MiB", (count as f64) / (MIB as f64)),
0..=MIBM1 => format!("{:.1} kiB", (count as f64) / (KIB as f64)),
};
let dec = match count {
EB..=u64::MAX => format!("{:.4} EB", ((count / TB) as f64) / (MB as f64)),
PB..=EBM1 => format!("{:.4} PB", ((count / GB) as f64) / (MB as f64)),
TB..=PBM1 => format!("{:.4} TB", ((count / MB) as f64) / (MB as f64)),
GB..=TBM1 => format!("{:.2} GB", ((count / MB) as f64) / (KB as f64)),
MB..=GBM1 => format!("{:.1} MB", (count as f64) / (MB as f64)),
0..=MBM1 => format!("{:.1} kB", (count as f64) / (KB as f64)),
};
if binary {
ret.push_str(&bin);
}
if decimal {
let len = ret.len();
if len > 0 { ret.push_str(" ("); }
ret.push_str(&dec);
if len > 0 { ret.push(')'); }
}
}
}
ret
}
pub fn parsebytes(s: &str) -> Result<u64, <u64 as std::str::FromStr>::Err> {
let s = s.trim().to_lowercase();
if let Some(s) = s.strip_suffix("eib") {
Ok(s.trim().parse::<u64>()? * EIB)
} else if let Some(s) = s.strip_suffix("pib") {
Ok(s.trim().parse::<u64>()? * PIB)
} else if let Some(s) = s.strip_suffix("tib") {
Ok(s.trim().parse::<u64>()? * TIB)
} else if let Some(s) = s.strip_suffix("gib") {
Ok(s.trim().parse::<u64>()? * GIB)
} else if let Some(s) = s.strip_suffix("mib") {
Ok(s.trim().parse::<u64>()? * MIB)
} else if let Some(s) = s.strip_suffix("kib") {
Ok(s.trim().parse::<u64>()? * KIB)
} else if let Some(s) = s.strip_suffix('e') {
Ok(s.trim().parse::<u64>()? * EIB)
} else if let Some(s) = s.strip_suffix('p') {
Ok(s.trim().parse::<u64>()? * PIB)
} else if let Some(s) = s.strip_suffix('t') {
Ok(s.trim().parse::<u64>()? * TIB)
} else if let Some(s) = s.strip_suffix('g') {
Ok(s.trim().parse::<u64>()? * GIB)
} else if let Some(s) = s.strip_suffix('m') {
Ok(s.trim().parse::<u64>()? * MIB)
} else if let Some(s) = s.strip_suffix('k') {
Ok(s.trim().parse::<u64>()? * KIB)
} else if let Some(s) = s.strip_suffix("eb") {
Ok(s.trim().parse::<u64>()? * EB)
} else if let Some(s) = s.strip_suffix("pb") {
Ok(s.trim().parse::<u64>()? * PB)
} else if let Some(s) = s.strip_suffix("tb") {
Ok(s.trim().parse::<u64>()? * TB)
} else if let Some(s) = s.strip_suffix("gb") {
Ok(s.trim().parse::<u64>()? * GB)
} else if let Some(s) = s.strip_suffix("mb") {
Ok(s.trim().parse::<u64>()? * MB)
} else if let Some(s) = s.strip_suffix("kb") {
Ok(s.trim().parse::<u64>()? * KB)
} else {
s.parse()
}
}
/// Fold a byte vector into a smaller byte vector using XOR operation.
/// If output_size is bigger than input.len(), the trailing bytes
/// will be filled with zeros.
pub fn fold(input: &[u8], output_size: usize) -> Vec<u8> {
let mut output = vec![0; output_size];
if output_size > 0 {
for (i, data) in input.iter().enumerate() {
output[i % output_size] ^= data;
}
}
output
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_prettybytes() {
assert_eq!(prettybytes(42, true, true),
"42 bytes");
assert_eq!(prettybytes(42 * 1024, true, true),
"42.0 kiB (43.0 kB)");
assert_eq!(prettybytes(42 * 1024 * 1024, true, true),
"42.0 MiB (44.0 MB)");
assert_eq!(prettybytes(42 * 1024 * 1024 * 1024, true, true),
"42.00 GiB (45.10 GB)");
assert_eq!(prettybytes(42 * 1024 * 1024 * 1024 * 1024, true, true),
"42.0000 TiB (46.1795 TB)");
assert_eq!(prettybytes(42 * 1024 * 1024 * 1024 * 1024 * 1024, true, true),
"42.0000 PiB (47.2878 PB)");
assert_eq!(prettybytes(2 * 1024 * 1024 * 1024 * 1024 * 1024 * 1024, true, true),
"2.0000 EiB (2.3058 EB)");
assert_eq!(prettybytes(42, true, false),
"42 bytes");
assert_eq!(prettybytes(42, false, true),
"42 bytes");
assert_eq!(prettybytes(42, false, false),
"");
assert_eq!(prettybytes(42 * 1024, true, false),
"42.0 kiB");
assert_eq!(prettybytes(42 * 1024, false, true),
"43.0 kB");
assert_eq!(prettybytes(42 * 1024, false, false),
"");
}
#[test]
fn test_parsebytes() {
assert_eq!(parsebytes("42").unwrap(),
42);
assert_eq!(parsebytes("42kib").unwrap(),
42 * 1024);
assert_eq!(parsebytes("42 mib").unwrap(),
42 * 1024 * 1024);
assert_eq!(parsebytes(" 42 gib ").unwrap(),
42 * 1024 * 1024 * 1024);
assert_eq!(parsebytes("42Tib").unwrap(),
42 * 1024 * 1024 * 1024 * 1024);
assert_eq!(parsebytes("42PiB").unwrap(),
42 * 1024 * 1024 * 1024 * 1024 * 1024);
assert_eq!(parsebytes("2 EIB ").unwrap(),
2 * 1024 * 1024 * 1024 * 1024 * 1024 * 1024);
assert_eq!(parsebytes("42k").unwrap(),
42 * 1024);
assert_eq!(parsebytes("42 m").unwrap(),
42 * 1024 * 1024);
assert_eq!(parsebytes(" 42 g ").unwrap(),
42 * 1024 * 1024 * 1024);
assert_eq!(parsebytes("42T").unwrap(),
42 * 1024 * 1024 * 1024 * 1024);
assert_eq!(parsebytes("42P").unwrap(),
42 * 1024 * 1024 * 1024 * 1024 * 1024);
assert_eq!(parsebytes("2 E ").unwrap(),
2 * 1024 * 1024 * 1024 * 1024 * 1024 * 1024);
assert_eq!(parsebytes("42kb").unwrap(),
42 * 1000);
assert_eq!(parsebytes("42 mb").unwrap(),
42 * 1000 * 1000);
assert_eq!(parsebytes(" 42 gb ").unwrap(),
42 * 1000 * 1000 * 1000);
assert_eq!(parsebytes("42Tb").unwrap(),
42 * 1000 * 1000 * 1000 * 1000);
assert_eq!(parsebytes("42PB").unwrap(),
42 * 1000 * 1000 * 1000 * 1000 * 1000);
assert_eq!(parsebytes("2 EB ").unwrap(),
2 * 1000 * 1000 * 1000 * 1000 * 1000 * 1000);
}
#[test]
fn test_fold() {
assert_eq!(fold(&[0x55, 0x55, 0xAA, 0xAA], 2),
[0xFF, 0xFF]);
assert_eq!(fold(&[0x55, 0x55, 0x55, 0x55], 2),
[0x00, 0x00]);
assert_eq!(fold(&[0x55, 0x55, 0xAA, 0x55], 2),
[0xFF, 0x00]);
assert_eq!(fold(&[0x55, 0x55, 0x55, 0xAA], 2),
[0x00, 0xFF]);
assert_eq!(fold(&[0x98, 0xB1, 0x5B, 0x47, 0x8F, 0xF7, 0x9C, 0x6F], 3),
[0x43, 0x51, 0xAC]);
assert_eq!(fold(&[0x12, 0x34, 0x56, 0x78], 4),
[0x12, 0x34, 0x56, 0x78]);
assert_eq!(fold(&[0x12, 0x34, 0x56, 0x78], 6),
[0x12, 0x34, 0x56, 0x78, 0x00, 0x00]);
assert_eq!(fold(&[0x12, 0x34, 0x56, 0x78], 0),
[]);
}
}
// vim: ts=4 sw=4 expandtab
|
