acpi: Support writing a name

ACPI supports storing names which are made up of multiple path components.
Several special cases are supported. Add a function to emit a name.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

include/test/ut.h

@@ -134,6 +134,23 @@ int ut_check_console_dump(struct unit_test_state *uts, int total_bytes);
 	}								\
 }
 
+/*
+ * Assert that two string expressions are equal, up to length of the
+ * first
+ */
+#define ut_asserteq_strn(expr1, expr2) {				\
+	const char *_val1 = (expr1), *_val2 = (expr2);			\
+	int _len = strlen(_val1);					\
+									\
+	if (memcmp(_val1, _val2, _len)) {				\
+		ut_failf(uts, __FILE__, __LINE__, __func__,		\
+			 #expr1 " = " #expr2,				\
+			 "Expected \"%.*s\", got \"%.*s\"",		\
+			 _len, _val1, _len, _val2);			\
+		return CMD_RET_FAILURE;					\
+	}								\
+}
+
 /* Assert that two memory areas are equal */
 #define ut_asserteq_mem(expr1, expr2, len) {				\
 	const u8 *_val1 = (u8 *)(expr1), *_val2 = (u8 *)(expr2);	\