Initial release

engine/vendor/vst3sdk/public.sdk/source/common/commonstringconvert.cpp

@@ -0,0 +1,101 @@
+//-----------------------------------------------------------------------------
+// Flags       : clang-format SMTGSequencer
+// Project     : VST SDK
+//
+// Category    : Helpers
+// Filename    : public.sdk/source/common/commonstringconvert.cpp
+// Created by  : Steinberg, 07/2024
+// Description : c++11 unicode string convert functions
+//
+//-----------------------------------------------------------------------------
+// This file is part of a Steinberg SDK. It is subject to the license terms
+// in the LICENSE file found in the top-level directory of this distribution
+// and at www.steinberg.net/sdklicenses.
+// No part of the SDK, including this file, may be copied, modified, propagated,
+// or distributed except according to the terms contained in the LICENSE file.
+//-----------------------------------------------------------------------------
+
+#include "commonstringconvert.h"
+
+#include <codecvt>
+#include <istream>
+#include <locale>
+
+#ifdef __clang__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+#elif defined(_MSC_VER)
+#pragma warning(push)
+#pragma warning(disable : 4996)
+#endif
+
+//------------------------------------------------------------------------
+namespace Steinberg {
+namespace StringConvert {
+
+//------------------------------------------------------------------------
+namespace {
+
+#if defined(_MSC_VER) && _MSC_VER >= 1900
+#define USE_WCHAR_AS_UTF16TYPE
+using UTF16Type = wchar_t;
+#else
+using UTF16Type = char16_t;
+#endif
+
+using Converter = std::wstring_convert<std::codecvt_utf8_utf16<UTF16Type>, UTF16Type>;
+
+//------------------------------------------------------------------------
+Converter& converter ()
+{
+	static Converter conv;
+	return conv;
+}
+
+//------------------------------------------------------------------------
+} // anonymous
+
+//------------------------------------------------------------------------
+std::u16string convert (const std::string& utf8Str)
+{
+#if defined(USE_WCHAR_AS_UTF16TYPE)
+	auto wstr = converter ().from_bytes (utf8Str);
+	return {wstr.data (), wstr.data () + wstr.size ()};
+#else
+	return converter ().from_bytes (utf8Str);
+#endif
+}
+
+//------------------------------------------------------------------------
+std::string convert (const std::u16string& str)
+{
+	return converter ().to_bytes (reinterpret_cast<const UTF16Type*> (str.data ()),
+	                              reinterpret_cast<const UTF16Type*> (str.data () + str.size ()));
+}
+
+//------------------------------------------------------------------------
+std::string convert (const char* str, uint32_t max)
+{
+	std::string result;
+	if (str)
+	{
+		result.reserve (max);
+		for (uint32_t i = 0; i < max; ++i, ++str)
+		{
+			if (*str == 0)
+				break;
+			result += *str;
+		}
+	}
+	return result;
+}
+
+//------------------------------------------------------------------------
+} // StringConvert
+} // Steinberg
+
+#ifdef __clang__
+#pragma clang diagnostic pop
+#elif defined(_MSC_VER)
+#pragma warning(pop)
+#endif