From eff82c45c589b42061344039d5f2efc8ad7c52df Mon Sep 17 00:00:00 2001
From: stefan <stefan@s00.xyz>
Date: Fri, 21 Apr 2023 19:53:04 -0400
Subject: libfdt port and the required libc functions

---
 lib/libfdt/fdt_strerror.c | 60 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 lib/libfdt/fdt_strerror.c

(limited to 'lib/libfdt/fdt_strerror.c')

diff --git a/lib/libfdt/fdt_strerror.c b/lib/libfdt/fdt_strerror.c
new file mode 100644
index 0000000..d852b77
--- /dev/null
+++ b/lib/libfdt/fdt_strerror.c
@@ -0,0 +1,60 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
+/*
+ * libfdt - Flat Device Tree manipulation
+ * Copyright (C) 2006 David Gibson, IBM Corporation.
+ *     EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#include "libfdt_env.h"
+
+#include <fdt.h>
+#include <libfdt.h>
+
+#include "libfdt_internal.h"
+
+struct fdt_errtabent {
+	const char *str;
+};
+
+#define FDT_ERRTABENT(val) \
+	[(val)] = { .str = #val, }
+
+static struct fdt_errtabent fdt_errtable[] = {
+	FDT_ERRTABENT(FDT_ERR_NOTFOUND),
+	FDT_ERRTABENT(FDT_ERR_EXISTS),
+	FDT_ERRTABENT(FDT_ERR_NOSPACE),
+
+	FDT_ERRTABENT(FDT_ERR_BADOFFSET),
+	FDT_ERRTABENT(FDT_ERR_BADPATH),
+	FDT_ERRTABENT(FDT_ERR_BADPHANDLE),
+	FDT_ERRTABENT(FDT_ERR_BADSTATE),
+
+	FDT_ERRTABENT(FDT_ERR_TRUNCATED),
+	FDT_ERRTABENT(FDT_ERR_BADMAGIC),
+	FDT_ERRTABENT(FDT_ERR_BADVERSION),
+	FDT_ERRTABENT(FDT_ERR_BADSTRUCTURE),
+	FDT_ERRTABENT(FDT_ERR_BADLAYOUT),
+	FDT_ERRTABENT(FDT_ERR_INTERNAL),
+	FDT_ERRTABENT(FDT_ERR_BADNCELLS),
+	FDT_ERRTABENT(FDT_ERR_BADVALUE),
+	FDT_ERRTABENT(FDT_ERR_BADOVERLAY),
+	FDT_ERRTABENT(FDT_ERR_NOPHANDLES),
+	FDT_ERRTABENT(FDT_ERR_BADFLAGS),
+	FDT_ERRTABENT(FDT_ERR_ALIGNMENT),
+};
+#define FDT_ERRTABSIZE	((int)(sizeof(fdt_errtable) / sizeof(fdt_errtable[0])))
+
+const char *fdt_strerror(int errval)
+{
+	if (errval > 0)
+		return "<valid offset/length>";
+	else if (errval == 0)
+		return "<no error>";
+	else if (-errval < FDT_ERRTABSIZE) {
+		const char *s = fdt_errtable[-errval].str;
+
+		if (s)
+			return s;
+	}
+
+	return "<unknown error>";
+}
-- 
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