nn_fp: Full rework of friend service

src/Common/CafeString.h

@@ -0,0 +1,73 @@
+#pragma once
+#include "betype.h"
+#include "util/helpers/StringHelpers.h"
+
+/* Helper classes to represent CafeOS strings in emulated memory */
+template <size_t N>
+class CafeString // fixed buffer size, null-terminated, PPC char
+{
+  public:
+	bool assign(std::string_view sv)
+	{
+		if (sv.size()+1 >= N)
+		{
+			memcpy(data, sv.data(), sv.size()-1);
+			data[sv.size()-1] = '\0';
+			return false;
+		}
+		memcpy(data, sv.data(), sv.size());
+		data[sv.size()] = '\0';
+		return true;
+	}
+
+	uint8be data[N];
+};
+
+template <size_t N>
+class CafeWideString // fixed buffer size, null-terminated, PPC wchar_t (16bit big-endian)
+{
+  public:
+	bool assign(const uint16be* input)
+	{
+		size_t i = 0;
+		while(input[i])
+		{
+			if(i >= N-1)
+			{
+				data[N-1] = 0;
+				return false;
+			}
+			data[i] = input[i];
+			i++;
+		}
+		data[i] = 0;
+		return true;
+	}
+
+	bool assignFromUTF8(std::string_view sv)
+	{
+		std::basic_string<uint16be> beStr = StringHelpers::FromUtf8(sv);
+		if(beStr.length() > N-1)
+		{
+			memcpy(data, beStr.data(), (N-1)*sizeof(uint16be));
+			data[N-1] = 0;
+			return false;
+		}
+		memcpy(data, beStr.data(), beStr.length()*sizeof(uint16be));
+		data[beStr.length()] = '\0';
+		return true;
+	}
+
+	uint16be data[N];
+};
+
+namespace CafeStringHelpers
+{
+	static uint32 Length(const uint16be* input, uint32 maxLength)
+	{
+		uint32 i = 0;
+		while(input[i] && i < maxLength)
+			i++;
+		return i;
+	}
+};