From 66ea301fc25a07485286560c434a9fdaf460c431 Mon Sep 17 00:00:00 2001
From: Nadrieril
Date: Sun, 1 Nov 2020 16:10:00 +0000
Subject: Untangle caching code

---
 dhall/src/utils.rs | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 dhall/src/utils.rs

(limited to 'dhall/src/utils.rs')

diff --git a/dhall/src/utils.rs b/dhall/src/utils.rs
new file mode 100644
index 0000000..d1e642a
--- /dev/null
+++ b/dhall/src/utils.rs
@@ -0,0 +1,17 @@
+use std::fs::File;
+use std::io::Read;
+use std::path::Path;
+
+use crate::error::Error;
+
+// Compute the sha256 hash of a bitstring.
+pub fn sha256_hash(data: &[u8]) -> Box<[u8]> {
+    use sha2::Digest;
+    sha2::Sha256::digest(data).as_slice().into()
+}
+
+pub fn read_binary_file(path: impl AsRef<Path>) -> Result<Box<[u8]>, Error> {
+    let mut buffer = Vec::new();
+    File::open(path)?.read_to_end(&mut buffer)?;
+    Ok(buffer.into())
+}
-- 
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