error handling: improved cmd_error() - print fatfs error strings

1 files changed, 26 insertions, 0 deletions

diff --git a/avr/strerror.c b/avr/strerror.c
new file mode 100644
index 0000000..d80a3bc
--- /dev/null
+++ b/avr/strerror.c
@@ -0,0 +1,26 @@
+/*
+ * (C) Copyright 2018 Leo C. <erbl259-lmu@yahoo.de>
+ *
+ * SPDX-License-Identifier:	GPL-2.0
+ */
+
+#include "common.h"
+#include "cmd_fat.h"
+
+static const FLASH char * const FLASH error_strings[] = {
+	FSTR("Unknown error")
+};
+
+const FLASH char * my_strerror_P(int errnum)
+{
+	if (errnum < 100)
+		return fat_rctostr(errnum);
+
+	errnum -= 100;
+	if (errnum < 0)
+		errnum = 0;
+	if ((unsigned) errnum >= ARRAY_SIZE(error_strings))
+		errnum = 0;
+
+	return 	error_strings[errnum];
+}