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// validateunicode.h
//
// This file is a part of Unicode NSIS.
//
// Copyright (C) 2009-2018 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"
#include <stdio.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 int 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
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