flatten 20260225

tjp/core/string/to_cstring.hpp

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+// TJP COPYRIGHT HEADER
+
+#pragma once
+
+#include <sstream>
+#include <iomanip>
+
+namespace tjp::core {
+
+template<typename T>
+String to_cstring(const T &v)
+{
+	std::ostringstream out_;
+	for (auto &c_ : v)
+	{
+		auto c = static_cast<unsigned char>(c_);
+		
+		out_ << "\\x" << std::hex << std::setw(2) << std::setfill('0') << (static_cast<unsigned int>(c) & 0xff);
+	}
+	
+	return out_.str();
+}
+
+template<typename T>
+String to_printable_with_dots(const T &v)
+{
+	std::ostringstream out_;
+	for (auto &c_ : v)
+	{
+		if (isprint(static_cast<unsigned char>(c_) && c_ != '\n'))
+		{
+			out_ << c_;
+		}
+		else
+		{
+			out_ << ".";
+		}
+	}
+
+	return out_.str();
+}
+
+} // namespace