Add 'json4cpp/' from commit '9a737481aed085fd289f82dff1fa8c3c66627a7e'

git-subtree-dir: json4cpp
git-subtree-mainline: 292baed7ac0cf84263263966ed32ed113cae857f
git-subtree-split: 9a737481aed085fd289f82dff1fa8c3c66627a7e

1 files changed, 33 insertions, 0 deletions

diff --git a/json4cpp/tests/src/test_utils.hpp b/json4cpp/tests/src/test_utils.hpp
new file mode 100644
index 0000000000..37afa21e8b
--- /dev/null
+++ b/json4cpp/tests/src/test_utils.hpp
@@ -0,0 +1,33 @@
+//     __ _____ _____ _____
+//  __|  |   __|     |   | |  JSON for Modern C++ (supporting code)
+// |  |  |__   |  |  | | | |  version 3.12.0
+// |_____|_____|_____|_|___|  https://github.com/nlohmann/json
+//
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
+// SPDX-License-Identifier: MIT
+
+#pragma once
+
+#include <cstdint> // uint8_t
+#include <fstream> // ifstream, istreambuf_iterator, ios
+#include <vector> // vector
+
+namespace utils
+{
+
+inline std::vector<std::uint8_t> read_binary_file(const std::string& filename)
+{
+    std::ifstream file(filename, std::ios::binary);
+    file.unsetf(std::ios::skipws);
+
+    file.seekg(0, std::ios::end);
+    const auto size = file.tellg();
+    file.seekg(0, std::ios::beg);
+
+    std::vector<std::uint8_t> byte_vector;
+    byte_vector.reserve(static_cast<std::size_t>(size));
+    byte_vector.insert(byte_vector.begin(), std::istream_iterator<std::uint8_t>(file), std::istream_iterator<std::uint8_t>());
+    return byte_vector;
+}
+
+} // namespace utils