1 files changed, 51 insertions, 0 deletions
diff --git a/cortex-m-semihosting/src/export.rs b/cortex-m-semihosting/src/export.rs
new file mode 100644
index 0000000..c188ab0
--- /dev/null
+++ b/cortex-m-semihosting/src/export.rs
@@ -0,0 +1,51 @@
+//! IMPLEMENTATION DETAILS USED BY MACROS
+
+use core::fmt::{self, Write};
+
+use cortex_m::interrupt;
+
+use crate::hio::{self, HStderr, HStdout};
+
+static mut HSTDOUT: Option<HStdout> = None;
+
+pub fn hstdout_str(s: &str) {
+    let _result = interrupt::free(|_| unsafe {
+        if HSTDOUT.is_none() {
+            HSTDOUT = Some(hio::hstdout()?);
+        }
+
+        HSTDOUT.as_mut().unwrap().write_str(s).map_err(drop)
+    });
+}
+
+pub fn hstdout_fmt(args: fmt::Arguments) {
+    let _result = interrupt::free(|_| unsafe {
+        if HSTDOUT.is_none() {
+            HSTDOUT = Some(hio::hstdout()?);
+        }
+
+        HSTDOUT.as_mut().unwrap().write_fmt(args).map_err(drop)
+    });
+}
+
+static mut HSTDERR: Option<HStderr> = None;
+
+pub fn hstderr_str(s: &str) {
+    let _result = interrupt::free(|_| unsafe {
+        if HSTDERR.is_none() {
+            HSTDERR = Some(hio::hstderr()?);
+        }
+
+        HSTDERR.as_mut().unwrap().write_str(s).map_err(drop)
+    });
+}
+
+pub fn hstderr_fmt(args: fmt::Arguments) {
+    let _result = interrupt::free(|_| unsafe {
+        if HSTDERR.is_none() {
+            HSTDERR = Some(hio::hstderr()?);
+        }
+
+        HSTDERR.as_mut().unwrap().write_fmt(args).map_err(drop)
+    });
+}