kern/error: new error_str function

1 files changed, 16 insertions, 15 deletions

diff --git a/kern/error.c b/kern/error.c
index 3e50149..f448b4d 100644
--- a/kern/error.c
+++ b/kern/error.c
@@ -18,32 +18,33 @@
 #include <kern/error.h>
 #include <kern/panic.h>
 
-void
-error_check(int error, const char *prefix)
+const char *
+error_str(int error)
 {
-    const char *msg;
-
     switch (error) {
     case 0:
-        return;
+        return "success";
     case ERROR_NOMEM:
-        msg = "out of memory";
-        break;
+        return "out of memory";
     case ERROR_AGAIN:
-        msg = "resource temporarily unavailable";
-        break;
+        return "resource temporarily unavailable";
     case ERROR_INVAL:
-        msg = "invalid argument";
-        break;
+        return "invalid argument";
     case ERROR_BUSY:
-        msg = "device or resource busy";
-        break;
+        return "device or resource busy";
     default:
-        msg = "unknown error";
+        return "unknown error";
     }
+}
+
+void
+error_check(int error, const char *prefix)
+{
+    if (!error)
+        return;
 
     panic("%s%s%s",
           (prefix == NULL) ? "" : prefix,
           (prefix == NULL) ? "" : ": ",
-          msg);
+          error_str(error));
 }