Unicode port: Support for Unicode/UTF8 input files by Jim Park.

git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@6066 212acab6-be3b-0410-9dea-997c60f758d6

Source/validateunicode.h

@@ -0,0 +1,61 @@
+// validateunicode.h
+//
+// This file is a part of Unicode NSIS.
+//
+// Copyright (C) 2009 Jim Park
+//
+// Licensed under the zlib/libpng license (the "License");
+// you may not use this file except in compliance with the License.
+//
+// This software is provided 'as-is', without any expressed or implied
+// warranty.
+//
+// This class can be used to check a buffer to see if it has the expected
+// Unicode encoding and look for byte order marks.
+
+#ifndef _VALIDATEUNICODE_
+#define _VALIDATEUNICODE_
+
+#include "tchar.h"
+
+class CValidateUnicode
+{
+	public:
+
+		// Enum type for each Unicode encoding.
+		enum FILE_TYPE
+		{
+			UTF_8 = 0,
+			UTF_16LE,
+			UTF_16BE,
+			UTF_32LE,
+			UTF_32BE,
+			UNKNOWN
+		};
+
+		// Make sure that the buffer contains valid UTF-8 encoding.
+		static bool ValidateUTF8(unsigned char* buf, size_t characters);
+
+		// Make sure that the buffer contains valid UTF-16LE encoding.
+		static bool ValidateUTF16LE(unsigned char* buf, size_t bytes);
+
+		// Make sure that the buffer contains valid UTF-16BE encoding.
+		static bool ValidateUTF16BE(unsigned char* buf, size_t bytes);
+
+		// Make sure that the buffer contains valid UTF-16 encoding.
+		static bool ValidateUTF16(unsigned short* buf, size_t characters);
+
+		// Does the buffer have a byte order mark?  And if so, what does it say?
+		static FILE_TYPE CheckBOM(unsigned char* buf, size_t bytes);
+
+		// Convert a FILE_TYPE enum to a string.
+		static const TCHAR* TypeToName(FILE_TYPE ftype);
+
+	protected:
+
+		// Given the initial byte of a UTF-8 character, how many bytes are to
+		// follow?
+		static int GetBytesToFollow(unsigned char ch);
+};
+
+#endif