propagate errors from longfi_send

Related to and depends on lora!1 (closed).

longfi-sys/Cargo.toml

 [package]
 name = "longfi-sys"
-version = "0.1.0"
-authors = ["Louis Thiery <louis@helium.com>"]
+version = "0.2.0"
+authors = ["Louis Thiery <louis@helium.com>", "Viktor Sonesten <viktor.sonesten@grepit.se"]
 edition = "2018"
 build = "build.rs"
 

longfi-sys/build.rs

@@ -44,6 +44,7 @@ fn main() {
        .rustified_enum("RfEvent_t")
        .rustified_enum("QualityOfService_t")
        .rustified_enum("AntPinsMode_t")
+       .rustified_enum("SendError_t")
        .derive_copy(false)
        .derive_debug(false)
        .layout_tests(false)

src/lib.rs

@@ -11,6 +11,7 @@ use longfi_sys::Radio_t;
 pub use longfi_sys::RfConfig_t as RfConfig;
 pub use longfi_sys::RfEvent_t as RfEvent;
 pub use longfi_sys::RxPacket_t as RxPacket;
+pub use longfi_sys::SendError_t as SendError;
 
 // feature sx1276
 static mut SX1276: Option<Radio_t> = None;
@@ -56,9 +57,13 @@ impl LongFi {
         unsafe { longfi_sys::longfi_handle_event(&mut self.c_handle, event) }
     }
 
-    pub fn send(&mut self, buffer: &[u8]) {
+    pub fn send(&mut self, buffer: &[u8]) -> Result<(), SendError> {
         unsafe {
-            longfi_sys::longfi_send(&mut self.c_handle, buffer.as_ptr(), buffer.len());
+            let e = longfi_sys::longfi_send(&mut self.c_handle, buffer.as_ptr(), buffer.len());
+            match e {
+                SendError::SendError_None => Ok(()),
+                _ => Err(e),
+            }
         }
     }