add no-std

src/message.rs

@@ -1,6 +1,19 @@
-use log::warn;
-use thiserror::Error;
+use log::{warn, error};
 
+// Use std::vec when std exists, otherwise alloc::vec
+#[cfg(feature = "std")]
+use std::vec;
+
+#[cfg(not(feature = "std"))]
+extern crate alloc;
+
+#[cfg(not(feature = "std"))]
+use alloc::vec;
+
+#[cfg(not(feature = "std"))]
+use alloc::vec::Vec;
+
+use thiserror::Error;
 use crate::{enums::{FunctionCode, MessageIdentifier}, utils::calculate_checksum};
 
 #[derive(PartialEq, Eq, Debug)]
@@ -167,7 +180,7 @@ impl Protocol300Message {
 pub enum MessageCreationError {
     /// The data length is longer than u8
     #[error("Data too long")]
-    DataTooLong(#[from] std::num::TryFromIntError),
+    DataTooLong(#[from] core::num::TryFromIntError),
 
 }
 
@@ -190,7 +203,7 @@ pub enum MessageDecodingError {
     InvalidTelegramStart(u8),
     /// Error getiting the length of the bytes slice, should never happen
     #[error("Error getting the length of the bytes slice")]
-    NoLength(#[from] std::num::TryFromIntError),
+    NoLength(#[from] core::num::TryFromIntError),
     /// The advertiesed telegram length and actual length do not match
     #[error("The advertiesed telegram length and actual length do not match")]
     LengthMismatch(),
@@ -204,7 +217,15 @@ pub enum MessageDecodingError {
 
 #[cfg(test)]
 mod tests {
-    use crate::{enums::{FunctionCode, MessageIdentifier}, message::{MessageCreationError, Protocol300Message}, utils::calculate_checksum};
+    use crate::{enums::{FunctionCode, MessageIdentifier}, message::{MessageCreationError, Protocol300Message}};
+    #[cfg(not(feature = "std"))]
+    extern crate alloc;
+
+    #[cfg(not(feature = "std"))]
+    use alloc::vec;
+
+    #[cfg(not(feature = "std"))]
+    use alloc::vec::Vec;
 
 
     #[test]