#ifndef __UnicodeConversions_h__
#define __UnicodeConversions_h__

// =================================================================================================
// Copyright 2004-2007 Adobe Systems Incorporated
// All Rights Reserved.
//
// NOTICE:  Adobe permits you to use, modify, and distribute this file in accordance with the terms
// of the Adobe license agreement accompanying it.
// =================================================================================================

#include <string>

// =================================================================================================
namespace DngXmpSdk {  
#if UnicodeTestBuild
	typedef unsigned char  UTF8Unit;
	typedef unsigned short UTF16Unit;
	typedef unsigned long  UTF32Unit;
#else
	typedef XMP_Uns8  UTF8Unit;
	typedef XMP_Uns16 UTF16Unit;
	typedef XMP_Uns32 UTF32Unit;
#endif

// -------------------------------------------------------------------------------------------------

// ! The UTF16 and UTF32 counts are in storage units, not bytes! CodePoint values are always native.

// *** MIght be better to return a status than throw an exception for errors?

typedef void (*CodePoint_to_UTF16_Proc) ( const UTF32Unit cpIn, UTF16Unit * utf16Out, const size_t utf16Len, size_t * utf16Written );

typedef void (*CodePoint_from_UTF16_Proc) ( const UTF16Unit * utf16In, const size_t utf16Len, UTF32Unit * cpOut, size_t * utf16Read );

typedef void (*UTF8_to_UTF16_Proc)  ( const UTF8Unit *  utf8In,    const size_t utf8Len,
				                      UTF16Unit *       utf16Out,  const size_t utf16Len,
				                      size_t *          utf8Read,  size_t *     utf16Written );

typedef void (*UTF8_to_UTF32_Proc)  ( const UTF8Unit *  utf8In,    const size_t utf8Len,
				                      UTF32Unit *       utf32Out,  const size_t utf32Len,
				                      size_t *          utf8Read,  size_t *     utf32Written );

typedef void (*UTF16_to_UTF8_Proc)  ( const UTF16Unit * utf16In,   const size_t utf16Len,
				                      UTF8Unit *        utf8Out,   const size_t utf8Len,
				                      size_t *          utf16Read, size_t *     utf8Written );

typedef void (*UTF32_to_UTF8_Proc)  ( const UTF32Unit * utf32In,   const size_t utf32Len,
				                      UTF8Unit *        utf8Out,   const size_t utf8Len,
				                      size_t *          utf32Read, size_t *     utf8Written );

typedef void (*UTF16_to_UTF32_Proc) ( const UTF16Unit * utf16In,   const size_t utf16Len,
				                      UTF32Unit *       utf32Out,  const size_t utf32Len,
				                      size_t *          utf16Read, size_t *     utf32Written );

typedef void (*UTF32_to_UTF16_Proc) ( const UTF32Unit * utf32In,   const size_t utf32Len,
				                      UTF16Unit *       utf16Out,  const size_t utf16Len,
				                      size_t *          utf32Read, size_t *     utf16Written );

// -------------------------------------------------------------------------------------------------

extern void CodePoint_to_UTF8 ( const UTF32Unit cpIn, UTF8Unit *  utf8Out,  const size_t utf8Len,  size_t * utf8Written );

extern void CodePoint_from_UTF8 ( const UTF8Unit *  utf8In,  const size_t utf8Len,  UTF32Unit * cpOut, size_t * utf8Read );

extern CodePoint_to_UTF16_Proc CodePoint_to_UTF16BE;
extern CodePoint_to_UTF16_Proc CodePoint_to_UTF16LE;

extern CodePoint_from_UTF16_Proc CodePoint_from_UTF16BE;
extern CodePoint_from_UTF16_Proc CodePoint_from_UTF16LE;

extern UTF8_to_UTF16_Proc  UTF8_to_UTF16BE;
extern UTF8_to_UTF16_Proc  UTF8_to_UTF16LE;

extern UTF8_to_UTF32_Proc  UTF8_to_UTF32BE;
extern UTF8_to_UTF32_Proc  UTF8_to_UTF32LE;

extern UTF16_to_UTF8_Proc  UTF16BE_to_UTF8;
extern UTF16_to_UTF8_Proc  UTF16LE_to_UTF8;

extern UTF32_to_UTF8_Proc  UTF32BE_to_UTF8;
extern UTF32_to_UTF8_Proc  UTF32LE_to_UTF8;

extern UTF8_to_UTF16_Proc  UTF8_to_UTF16Native;
extern UTF8_to_UTF32_Proc  UTF8_to_UTF32Native;

extern UTF16_to_UTF8_Proc  UTF16Native_to_UTF8;
extern UTF32_to_UTF8_Proc  UTF32Native_to_UTF8;

extern UTF16_to_UTF32_Proc UTF16BE_to_UTF32BE;
extern UTF16_to_UTF32_Proc UTF16BE_to_UTF32LE;

extern UTF16_to_UTF32_Proc UTF16LE_to_UTF32BE;
extern UTF16_to_UTF32_Proc UTF16LE_to_UTF32LE;

extern UTF32_to_UTF16_Proc UTF32BE_to_UTF16BE;
extern UTF32_to_UTF16_Proc UTF32BE_to_UTF16LE;

extern UTF32_to_UTF16_Proc UTF32LE_to_UTF16BE;
extern UTF32_to_UTF16_Proc UTF32LE_to_UTF16LE;

extern void SwapUTF16 ( const UTF16Unit * utf16In, UTF16Unit * utf16Out, const size_t utf16Len );
extern void SwapUTF32 ( const UTF32Unit * utf32In, UTF32Unit * utf32Out, const size_t utf32Len );

extern void ToUTF16 ( const UTF8Unit * utf8In, size_t utf8Len, std::string * utf16Str, bool bigEndian );
extern void ToUTF32 ( const UTF8Unit * utf8In, size_t utf8Len, std::string * utf32Str, bool bigEndian );

extern void FromUTF16 ( const UTF16Unit * utf16In, size_t utf16Len, std::string * utf8Str, bool bigEndian );
extern void FromUTF32 ( const UTF32Unit * utf32In, size_t utf32Len, std::string * utf8Str, bool bigEndian );

extern void ToUTF16Native ( const UTF8Unit * utf8In, size_t utf8Len, std::string * utf16Str );
extern void ToUTF32Native ( const UTF8Unit * utf8In, size_t utf8Len, std::string * utf32Str );

extern void FromUTF16Native ( const UTF16Unit * utf16In, size_t utf16Len, std::string * utf8Str );
extern void FromUTF32Native ( const UTF32Unit * utf32In, size_t utf32Len, std::string * utf8Str );

extern void InitializeUnicodeConversions();

// =================================================================================================
} //namespace
#endif	// __UnicodeConversions_h__
