1 files changed, 39 insertions, 0 deletions
diff --git a/third_party/rust/uuid/src/rng.rs b/third_party/rust/uuid/src/rng.rs
new file mode 100644
index 0000000000..dcfbb8d665
--- /dev/null
+++ b/third_party/rust/uuid/src/rng.rs
@@ -0,0 +1,39 @@
+#[cfg(any(feature = "v4", feature = "v7"))]
+pub(crate) fn bytes() -> [u8; 16] {
+    #[cfg(not(feature = "fast-rng"))]
+    {
+        let mut bytes = [0u8; 16];
+
+        getrandom::getrandom(&mut bytes).unwrap_or_else(|err| {
+            // NB: getrandom::Error has no source; this is adequate display
+            panic!("could not retrieve random bytes for uuid: {}", err)
+        });
+
+        bytes
+    }
+
+    #[cfg(feature = "fast-rng")]
+    {
+        rand::random()
+    }
+}
+
+#[cfg(any(feature = "v1", feature = "v6"))]
+pub(crate) fn u16() -> u16 {
+    #[cfg(not(feature = "fast-rng"))]
+    {
+        let mut bytes = [0u8; 2];
+
+        getrandom::getrandom(&mut bytes).unwrap_or_else(|err| {
+            // NB: getrandom::Error has no source; this is adequate display
+            panic!("could not retrieve random bytes for uuid: {}", err)
+        });
+
+        ((bytes[0] as u16) << 8) | (bytes[1] as u16)
+    }
+
+    #[cfg(feature = "fast-rng")]
+    {
+        rand::random()
+    }
+}