1 files changed, 43 insertions, 0 deletions
diff --git a/roms/u-boot/lib/efi_loader/efi_string.c b/roms/u-boot/lib/efi_loader/efi_string.c
new file mode 100644
index 000000000..a3b8edf5a
--- /dev/null
+++ b/roms/u-boot/lib/efi_loader/efi_string.c
@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * String functions
+ *
+ * Copyright (c) 2020 AKASHI Takahiro, Linaro Limited
+ */
+
+#include <common.h>
+#include <charset.h>
+#include <efi_loader.h>
+
+/**
+ * efi_create_indexed_name - create a string name with an index
+ * @buffer:	Buffer
+ * @name:	Name string
+ * @index:	Index
+ *
+ * Create a utf-16 string with @name, appending @index.
+ * For example, L"Capsule0001"
+ *
+ * The caller must ensure that the buffer has enough space for the resulting
+ * string including the trailing L'\0'.
+ *
+ * Return: A pointer to the next position after the created string
+ *	   in @buffer, or NULL otherwise
+ */
+u16 *efi_create_indexed_name(u16 *buffer, size_t buffer_size, const char *name,
+			     unsigned int index)
+{
+	u16 *p = buffer;
+	char index_buf[5];
+	size_t size;
+
+	size = (utf8_utf16_strlen(name) * sizeof(u16) +
+		sizeof(index_buf) * sizeof(u16));
+	if (buffer_size < size)
+		return NULL;
+	utf8_utf16_strcpy(&p, name);
+	snprintf(index_buf, sizeof(index_buf), "%04X", index);
+	utf8_utf16_strcpy(&p, index_buf);
+
+	return p;
+}