From 604a2929842312a04a7963355585f16ec8bca7a1 Mon Sep 17 00:00:00 2001
From: mriise <me@mriise.net>
Date: Sun, 23 Nov 2025 02:17:17 -0800
Subject: [PATCH 1/3] feat: support no_std

---
 Cargo.toml    |  3 ++-
 src/decode.rs | 13 ++++++++-----
 src/encode.rs |  4 +++-
 src/lib.rs    |  5 +++++
 src/tests.rs  |  2 ++
 5 files changed, 20 insertions(+), 7 deletions(-)

diff --git a/Cargo.toml b/Cargo.toml
index 70fd2cd..6a79bd7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -22,6 +22,7 @@ name = "bench"
 harness = false
 
 [features]
-# depcrecated, will be removed in a future release
+default = ["std"]
+std = []
 array_chunks = []
 unsafe = []
diff --git a/src/decode.rs b/src/decode.rs
index 07c3361..3bd6e52 100644
--- a/src/decode.rs
+++ b/src/decode.rs
@@ -1,24 +1,27 @@
 use crate::alphabet::{self, SIZE, SIZE_SIZE};
-use std::error::Error;
-use std::fmt::{Display, Formatter};
+
+#[cfg(not(feature = "std"))]
+use alloc::vec::Vec;
+
+use core::fmt::{Display, Formatter};
 /// The error type returned when the input is not a valid base45 string
 #[derive(Eq, PartialEq, Copy, Clone, Debug)]
 pub struct DecodeError;
 
 impl Display for DecodeError {
-    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+    fn fmt(&self, f: &mut Formatter<'_>) -> core::fmt::Result {
         f.write_str("Invalid base45 string")
     }
 }
 
-impl Error for DecodeError {}
+impl core::error::Error for DecodeError {}
 
 /// Decode a string from base45
 ///
 /// Takes a base45 encoded string and returns a UTF-8 string on success
 ///
 /// ```rust,no_run
-/// # fn main() -> Result<(), Box<dyn std::error::Error>> {
+/// # fn main() -> Result<(), Box<dyn core::error::Error>> {
 /// let decoded = String::from_utf8(base45::decode("%69 VD92EX0")?)?;
 /// assert_eq!(decoded, "Hello!!");
 /// # Ok(())
diff --git a/src/encode.rs b/src/encode.rs
index 0d2f31a..68581ba 100644
--- a/src/encode.rs
+++ b/src/encode.rs
@@ -1,6 +1,8 @@
 use crate::alphabet::{self, SIZE, SIZE_SIZE};
 
-#[inline(always)]
+#[cfg(not(feature = "std"))]
+use alloc::{string::String, vec::Vec};
+
 fn divmod<const N: u32>(x: u32) -> (u32, u32) {
     (x / N, x % N)
 }
diff --git a/src/lib.rs b/src/lib.rs
index bd321ba..7314dbe 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,3 +1,5 @@
+#![cfg_attr(feature = "array_chunks", feature(array_chunks))]
+#![cfg_attr(not(feature = "std"), no_std)]
 //! Encoder/decoder for base45 that is fully compatible with
 //! [`draft-faltstrom-base45-07.txt`](https://www.ietf.org/archive/id/draft-faltstrom-base45-07.txt)
 //!
@@ -14,6 +16,9 @@
 //!   [`core::slice::ChunksExact`](https://doc.rust-lang.org/core/slice/struct.ChunksExact.html).
 //!   Ideally, there is no performance penalty using this means.
 
+#[cfg(not(feature = "std"))]
+extern crate alloc;
+
 pub mod alphabet;
 mod decode;
 mod encode;
diff --git a/src/tests.rs b/src/tests.rs
index 35de6aa..917f50f 100644
--- a/src/tests.rs
+++ b/src/tests.rs
@@ -1,4 +1,6 @@
 use crate::*;
+#[cfg(not(feature = "std"))]
+use alloc::{vec, string::String};
 
 #[test]
 fn encode_ab() {

From 94c5762e4d4023e9bac324e54ab8cb98fa6c6b1b Mon Sep 17 00:00:00 2001
From: Rickard Natt och Dag <rickard@nattochdag.dev>
Date: Tue, 16 Dec 2025 22:43:21 +0100
Subject: [PATCH 2/3] chore: remove array_chunks

---
 Cargo.toml | 1 -
 src/lib.rs | 1 -
 2 files changed, 2 deletions(-)

diff --git a/Cargo.toml b/Cargo.toml
index 6a79bd7..1797e08 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -24,5 +24,4 @@ harness = false
 [features]
 default = ["std"]
 std = []
-array_chunks = []
 unsafe = []
diff --git a/src/lib.rs b/src/lib.rs
index 7314dbe..a3dc740 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,4 +1,3 @@
-#![cfg_attr(feature = "array_chunks", feature(array_chunks))]
 #![cfg_attr(not(feature = "std"), no_std)]
 //! Encoder/decoder for base45 that is fully compatible with
 //! [`draft-faltstrom-base45-07.txt`](https://www.ietf.org/archive/id/draft-faltstrom-base45-07.txt)

From 6b3d8ae862ed1db3c97e4c40e4e7628424d113f1 Mon Sep 17 00:00:00 2001
From: Rickard Natt och Dag <rickard@nattochdag.dev>
Date: Tue, 16 Dec 2025 22:47:17 +0100
Subject: [PATCH 3/3] chore: formatting

---
 src/tests.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/tests.rs b/src/tests.rs
index 917f50f..09d5137 100644
--- a/src/tests.rs
+++ b/src/tests.rs
@@ -1,6 +1,6 @@
 use crate::*;
 #[cfg(not(feature = "std"))]
-use alloc::{vec, string::String};
+use alloc::{string::String, vec};
 
 #[test]
 fn encode_ab() {