From f391048a7b987a149d0ba5421846b9b5ab916338 Mon Sep 17 00:00:00 2001
From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Date: Sun, 13 Oct 2019 22:22:04 +0300
Subject: libcamera: utils: Add hex stream output helper
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Add a utils::hex() function that simplifies writing hexadecimal values
to an ostream. The function handles the '0x' prefix, the field width and
the fill character automatically. Use it through the libcamera code
base, and add a test.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
---
 test/utils.cpp | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 test/utils.cpp

(limited to 'test/utils.cpp')

diff --git a/test/utils.cpp b/test/utils.cpp
new file mode 100644
index 00000000..9fe0d477
--- /dev/null
+++ b/test/utils.cpp
@@ -0,0 +1,53 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2018, Google Inc.
+ *
+ * utils.cpp - Miscellaneous utility tests
+ */
+
+#include <iostream>
+#include <sstream>
+
+#include "test.h"
+#include "utils.h"
+
+using namespace std;
+using namespace libcamera;
+
+class UtilsTest : public Test
+{
+protected:
+	int run()
+	{
+		std::ostringstream os;
+		std::string ref;
+
+		os << utils::hex(static_cast<int32_t>(0x42)) << " ";
+		ref += "0x00000042 ";
+		os << utils::hex(static_cast<uint32_t>(0x42)) << " ";
+		ref += "0x00000042 ";
+		os << utils::hex(static_cast<int64_t>(0x42)) << " ";
+		ref += "0x0000000000000042 ";
+		os << utils::hex(static_cast<uint64_t>(0x42)) << " ";
+		ref += "0x0000000000000042 ";
+		os << utils::hex(static_cast<int32_t>(0x42), 4) << " ";
+		ref += "0x0042 ";
+		os << utils::hex(static_cast<uint32_t>(0x42), 1) << " ";
+		ref += "0x42 ";
+		os << utils::hex(static_cast<int64_t>(0x42), 4) << " ";
+		ref += "0x0042 ";
+		os << utils::hex(static_cast<uint64_t>(0x42), 1) << " ";
+		ref += "0x42 ";
+
+		std::string s = os.str();
+		if (s != ref) {
+			cerr << "utils::hex() test failed, expected '" << ref
+			     << "', got '" << s << "'";
+			return TestFail;
+		}
+
+		return TestPass;
+	}
+};
+
+TEST_REGISTER(UtilsTest)
-- 
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