From f722258ef0f8924830228ec89b96486c41ff21b3 Mon Sep 17 00:00:00 2001
From: Christian Kamm <mail@ckamm.de>
Date: Wed, 17 Nov 2021 14:19:00 +0100
Subject: [PATCH] Add support for borsh serialization

---
 Cargo.toml      |  4 ++++
 src/borshize.rs | 50 +++++++++++++++++++++++++++++++++++++++++++++++++
 src/lib.rs      |  4 +++-
 3 files changed, 57 insertions(+), 1 deletion(-)
 create mode 100644 src/borshize.rs

diff --git a/Cargo.toml b/Cargo.toml
index dff8a90..0ce5948 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -54,5 +54,9 @@ version = "1.0.60"
 default-features = false
 optional = true
 
+[dependencies.borsh]
+version = "0.9.1"
+optional = true
+
 [package.metadata.docs.rs]
 features = ["arbitrary", "num-traits", "serde", "std"]
diff --git a/src/borshize.rs b/src/borshize.rs
new file mode 100644
index 0000000..2e10bd6
--- /dev/null
+++ b/src/borshize.rs
@@ -0,0 +1,50 @@
+// Copyright © 2018–2021 Trevor Spiteri
+
+// This library is free software: you can redistribute it and/or
+// modify it under the terms of either
+//
+//   * the Apache License, Version 2.0 or
+//   * the MIT License
+//
+// at your option.
+//
+// You should have recieved copies of the Apache License and the MIT
+// License along with the library. If not, see
+// <https://www.apache.org/licenses/LICENSE-2.0> and
+// <https://opensource.org/licenses/MIT>.
+
+use crate::{
+    FixedI128, FixedI16, FixedI32, FixedI64, FixedI8, FixedU128, FixedU16, FixedU32, FixedU64,
+    FixedU8,
+};
+use borsh::maybestd::io::{Result, Write};
+use borsh::{BorshDeserialize, BorshSerialize};
+
+macro_rules! borsh_fixed {
+    ($Fixed:ident is $TBits:ident) => {
+        impl<Frac> BorshSerialize for $Fixed<Frac> {
+            #[inline]
+            fn serialize<W: Write>(&self, writer: &mut W) -> Result<()> {
+                <$TBits as BorshSerialize>::serialize(&self.bits, writer)
+            }
+        }
+
+        impl<Frac> BorshDeserialize for $Fixed<Frac> {
+            #[inline]
+            fn deserialize(buf: &mut &[u8]) -> Result<Self> {
+                <$TBits as BorshDeserialize>::deserialize(buf).map($Fixed::from_bits)
+            }
+        }
+    };
+}
+
+borsh_fixed! { FixedI8 is i8 }
+borsh_fixed! { FixedI16 is i16 }
+borsh_fixed! { FixedI32 is i32 }
+borsh_fixed! { FixedI64 is i64 }
+borsh_fixed! { FixedI128 is i128 }
+borsh_fixed! { FixedU8 is u8 }
+borsh_fixed! { FixedU16 is u16 }
+borsh_fixed! { FixedU32 is u32 }
+borsh_fixed! { FixedU64 is u64 }
+borsh_fixed! { FixedU128 is u128 }
diff --git a/src/lib.rs b/src/lib.rs
index 75023f2..13af69a 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -302,6 +302,8 @@ extern crate std;
 mod macros;
 
 mod arith;
+#[cfg(feature = "borsh")]
+mod borshize;
 mod cast;
 mod cmp;
 pub mod consts;
@@ -493,7 +495,7 @@ assert_eq!(two_point_75.to_string(), \"2.8\");
 ";
             #[repr(transparent)]
             pub struct $Fixed<Frac> {
-                bits: $Inner,
+                pub(crate) bits: $Inner,
                 phantom: PhantomData<Frac>,
             }
         }
-- 
GitLab