mos: kern: Add formatted trace helpers

Signed-off-by: Ian Moffett <ian@osmora.org>

2 files changed, 23 insertions, 0 deletions

diff --git a/mos/sys/inc/kern/trace.h b/mos/sys/inc/kern/trace.h
index 820478e..bf60380 100644
--- a/mos/sys/inc/kern/trace.h
+++ b/mos/sys/inc/kern/trace.h
@@ -6,6 +6,8 @@
 #ifndef _KERN_TRACE_H_
 #define _KERN_TRACE_H_
 
+#define TRACE_BUF_LEN 256
+
 /*
  * Write a raw null terminated string to the system
  * trace logs
@@ -14,4 +16,13 @@
  */
 void trace_raw(const char *str);
 
+/*
+ * Write a formatted string to the system trace
+ * logs
+ *
+ * @fmt: Format string
+ * @<...>: Args
+ */
+void trace(const char *fmt, ...);
+
 #endif  /* !_KERN_TRACE_H_ */
diff --git a/mos/sys/kern/kern_trace.c b/mos/sys/kern/kern_trace.c
index 65f32a6..ee4f6c7 100644
--- a/mos/sys/kern/kern_trace.c
+++ b/mos/sys/kern/kern_trace.c
@@ -20,3 +20,15 @@ trace_raw(const char *str)
     len = strlen(str);
     mu_uart_writed(str, len);
 }
+
+void
+trace(const char *fmt, ...)
+{
+    char buf[TRACE_BUF_LEN];
+    va_list ap;
+
+    va_start(ap, fmt);
+    vsnprintf(buf, sizeof(buf), fmt, ap);
+    trace_raw(buf);
+    va_end(ap);
+}