use internal::{
dirs::{
corpus_directory_from_args_type, generic_args_directory_from_args_type,
impl_generic_args_directory_from_args_type,
},
serde_format,
};
use serde::{de::DeserializeOwned, Serialize};
use sha1::{Digest, Sha1};
use std::{
any::type_name,
env,
fmt::{self, Debug, Formatter},
fs::{create_dir_all, write},
io::{self, Read},
marker::PhantomData,
path::Path,
};
pub use num_traits;
pub mod traits;
struct DebugUnimplemented<T>(PhantomData<T>);
impl<T> Debug for DebugUnimplemented<T> {
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
const PAT: &str = "TryDebug<";
let type_name = type_name::<T>();
let pos = type_name.find(PAT).unwrap() + PAT.len();
write!(
f,
"<unknown of type {}>",
type_name[pos..].strip_suffix('>').unwrap()
)
}
}
pub trait TryDebugFallback {
fn apply<U>(&self, f: &mut dyn FnMut(&dyn Debug) -> U) -> U;
}
impl<T> TryDebugFallback for T {
fn apply<U>(&self, f: &mut dyn FnMut(&dyn Debug) -> U) -> U {
f(&DebugUnimplemented::<Self>(PhantomData))
}
}
pub struct TryDebug<'a, T>(pub &'a T);
impl<'a, T: Debug> TryDebug<'a, T> {
pub fn apply<U>(&self, f: &mut dyn FnMut(&dyn Debug) -> U) -> U {
f(self.0)
}
}
#[macro_export]
macro_rules! auto_impl {
($ty:ty, $trait:path, $expr:expr) => {{
trait AutoFallback<U> {
fn auto() -> Vec<U>;
}
impl<T, U> AutoFallback<U> for T {
#[must_use]
fn auto() -> Vec<U> {
vec![]
}
}
struct Auto<T>(std::marker::PhantomData<T>);
impl<T: $trait> Auto<T> {
#[must_use]
pub fn auto() -> Vec<T> {
$expr
}
}
Auto::<$ty>::auto() as Vec<$ty>
}};
}
#[macro_export]
macro_rules! auto {
($ty:ty) => {{
let xss = [
$crate::auto_impl!(
$ty,
$crate::num_traits::bounds::Bounded,
vec![T::min_value(), T::max_value()]
),
$crate::auto_impl!($ty, Default, vec![T::default()]),
$crate::auto_impl!(
$ty,
$crate::traits::MaxValueSubOne,
vec![T::max_value_sub_one()]
),
$crate::auto_impl!($ty, $crate::traits::Middle, vec![T::low(), T::high()]),
$crate::auto_impl!(
$ty,
$crate::traits::MinValueAddOne,
vec![T::min_value_add_one()]
),
];
IntoIterator::into_iter(xss).flatten()
}};
}
#[must_use]
pub fn test_fuzz_enabled() -> bool {
enabled("")
}
#[must_use]
pub fn display_enabled() -> bool {
enabled("DISPLAY")
}
#[must_use]
pub fn pretty_print_enabled() -> bool {
enabled("PRETTY_PRINT")
}
#[must_use]
pub fn replay_enabled() -> bool {
enabled("REPLAY")
}
#[must_use]
pub fn write_enabled() -> bool {
enabled("WRITE")
}
#[must_use]
fn enabled(opt: &str) -> bool {
let key = "TEST_FUZZ".to_owned() + if opt.is_empty() { "" } else { "_" } + opt;
env::var(key).map_or(false, |value| value != "0")
}
pub fn write_impl_generic_args<T>(args: &[&str]) {
let impl_generic_args = impl_generic_args_directory_from_args_type::<T>();
let data = args.join(", ");
write_data(&impl_generic_args, data.as_bytes()).unwrap();
}
pub fn write_generic_args<T>(args: &[&str]) {
let generic_args = generic_args_directory_from_args_type::<T>();
let data = args.join(", ");
write_data(&generic_args, data.as_bytes()).unwrap();
}
pub fn write_args<T: Serialize>(args: &T) {
let corpus = corpus_directory_from_args_type::<T>();
let data = serde_format::serialize(args);
write_data(&corpus, &data).unwrap();
}
pub fn write_data(dir: &Path, data: &[u8]) -> io::Result<()> {
create_dir_all(dir).unwrap_or_default();
let hex = {
let digest = Sha1::digest(data);
hex::encode(digest)
};
let path_buf = dir.join(hex);
write(path_buf, data)
}
pub fn read_args<T: DeserializeOwned, R: Read>(reader: R) -> Option<T> {
serde_format::deserialize(reader)
}