mirror of
https://github.com/mii443/RustySecrets.git
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c25f661645
* Update rustfmt compliance Looks like rustfmt has made some improvements recently, so wanted to bring the code up to date. * Add rustfmt to nightly item in Travis matrix * Use Travis Cargo cache * Allow fast_finish in Travis Items that match the `allow_failures` predicate (right now, just Rust nightly), will still finish, but Travis won't wait for them to report a result if the other builds have already finished. * Run kcov in a separate matrix build in Travis * Rework allowed_failures logic We don't want rustfmt to match `allow_failures` just because it needs to use nightly, while we do want nightly to match `allow_failures`. Env vars provide a solution. * Add --all switch to rustfmt Travis * Test building docs in Travis * Use exact Ubuntu dependencies listed for kcov Some of the dependencies we were installing were not listed on https://github.com/SimonKagstrom/kcov/blob/master/INSTALL.md, and we were missing one dependency that was listed there. When `sudo: true` Travis uses Ubuntu Trusty. * No need to build before running kcov kcov builds its own test executables. * Generate `Cargo.lock` w/ `cargo update` before running kcov As noted in aeb3906cce8e3e26c7bc80d6aec417b365f3d2f1 it is not necessary to build the project before running kcov, but kcov does require a `Cargo.lock` file, which can be generated with `cargo update`.
90 lines
2.0 KiB
Rust
90 lines
2.0 KiB
Rust
use std::env;
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use std::fmt;
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use std::fs::File;
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use std::io::Write;
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use std::num::Wrapping;
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use std::path::Path;
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const POLY: u8 = 0x1D;
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/// replicates the least significant bit to every other bit
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#[inline]
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fn mask(bit: u8) -> u8 {
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(Wrapping(0u8) - Wrapping(bit & 1)).0
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}
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/// multiplies a polynomial with x and returns the residual
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/// of the polynomial division with POLY as divisor
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#[inline]
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fn xtimes(poly: u8) -> u8 {
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(poly << 1) ^ (mask(poly >> 7) & POLY)
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}
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struct Tables {
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exp: [u8; 256],
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log: [u8; 256],
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}
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fn generate_tables(mut file: &File) {
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let mut tabs = Tables {
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exp: [0; 256],
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log: [0; 256],
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};
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let mut tmp = 1;
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for power in 0..255usize {
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tabs.exp[power] = tmp;
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tabs.log[tmp as usize] = power as u8;
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tmp = xtimes(tmp);
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}
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tabs.exp[255] = 1;
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match write!(file, "{}", tabs) {
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Ok(()) => {}
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Err(_) => panic!("Could not format the table. Aborting build."),
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};
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}
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fn farray(array: [u8; 256], f: &mut fmt::Formatter) -> fmt::Result {
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for (index, value) in array.into_iter().enumerate() {
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try!(write!(f, "{}", value));
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if index != array.len() - 1 {
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try!(write!(f, ","));
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}
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}
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Ok(())
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}
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impl fmt::Display for Tables {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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try!(write!(f, "Tables {{\n"));
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try!(write!(f, " exp: ["));
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try!(farray(self.exp, f));
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try!(write!(f, "],\n"));
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try!(write!(f, " log: ["));
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try!(farray(self.log, f));
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try!(write!(f, "]\n"));
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write!(f, "}};")
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}
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}
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#[allow(unused_must_use)]
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fn main() {
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let out_dir = env::var("OUT_DIR").unwrap();
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let dest = Path::new(&out_dir).join("nothinghardcoded.rs");
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let mut f = File::create(&dest).unwrap();
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write!(
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f,
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"pub struct Tables {{ \
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pub exp: [u8; 256], \
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pub log: [u8; 256] \
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}} \
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\
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pub static TABLES: Tables = "
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);
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generate_tables(&f);
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}
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