//%LICENSE////////////////////////////////////////////////////////////////
//
// Licensed to The Open Group (TOG) under one or more contributor license
// agreements.  Refer to the OpenPegasusNOTICE.txt file distributed with
// this work for additional information regarding copyright ownership.
// Each contributor licenses this file to you under the OpenPegasus Open
// Source License; you may not use this file except in compliance with the
// License.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
//////////////////////////////////////////////////////////////////////////
//
//%/////////////////////////////////////////////////////////////////////////////

#ifndef Pegasus_CommonUTF_h
#define Pegasus_CommonUTF_h
#include <Pegasus/Common/Config.h>
#include <Pegasus/Common/Linkage.h>
#include <Pegasus/Common/Mutex.h>

PEGASUS_NAMESPACE_BEGIN

class String;

#define FIRST_HIGH_SURROGATE  (Uint32)0xD800
#define LAST_HIGH_SURROGATE   (Uint32)0xDBFF
#define FIRST_LOW_SURROGATE   (Uint32)0xDC00
#define LAST_LOW_SURROGATE    (Uint32)0xDFFF
#define REPLACEMENT_CHARACTER (Uint32)0x0000FFFD
#define MAX_BYTE              (Uint32)0x0000FFFF
#define MAX_UTF16             (Uint32)0x0010FFFF

PEGASUS_COMMON_LINKAGE extern const Uint32 halfBase;
PEGASUS_COMMON_LINKAGE extern  const Uint32 halfMask;
PEGASUS_COMMON_LINKAGE extern  const int halfShift;
PEGASUS_COMMON_LINKAGE extern  const Uint8 firstByteMark[];

PEGASUS_COMMON_LINKAGE extern  const Uint32 offsetsFromUTF8[];

PEGASUS_COMMON_LINKAGE extern  const char trailingBytesForUTF8[];

#define UTF_8_COUNT_TRAIL_BYTES(leadByte) \
    (trailingBytesForUTF8[(Uint8)leadByte])

#define UTF8_NEXT(s, i) { \
    (i)=((i) + UTF_8_COUNT_TRAIL_BYTES((s)[(i)]) + 1); \
}

PEGASUS_COMMON_LINKAGE Boolean isValid_U8(const Uint8 *src,int size);

PEGASUS_COMMON_LINKAGE int UTF16toUTF8(
    const Uint16** srcHead,
    const Uint16* srcEnd,
    Uint8** tgtHead,
    Uint8* tgtEnd);

PEGASUS_COMMON_LINKAGE int UTF8toUTF16(
    const Uint8** srcHead,
    const Uint8* srcEnd,
    Uint16** tgtHead,
    Uint16* tgtEnd);

PEGASUS_COMMON_LINKAGE Boolean isUTF8Aux(const char*);

inline Boolean isUTF8(const char* c)
{
    return (unsigned int)c[0] < 128 || isUTF8Aux(c);
}

PEGASUS_COMMON_LINKAGE Boolean isUTF8Str(const char*);

/** Escape all characters above 7-bit ASCII.
    @param String: The string to be escaped Insert text here.
    @return String: The escaped string.
*/
PEGASUS_COMMON_LINKAGE String escapeStringEncoder(const String& Str);

/** decode string returned from escapeString Encoder.
    @param String: The string to be decoded.
    @return String: The decoded string.

    Prereq: Only the return string from the escapeStringEncoder can be used
            as input.
*/
PEGASUS_COMMON_LINKAGE String escapeStringDecoder(const String& Str);

/**
    The InitializeICU class loads and initializes data items that are required
    internally by various ICU functions. It makes sure that ICU function u_init
    is only called once by a process. A module which is using ICU APIs needs
    to call InitializeICU::initICUSuccessful first before it calls other ICU
    APIs. If InitializeICU::initICUSuccessful is failed, the module should not
    call other ICU APIs.
*/

#ifdef PEGASUS_HAS_ICU
class PEGASUS_COMMON_LINKAGE InitializeICU
{
public:

    /**
        Determines if ICU initialization is successful.

        @return  true, if u_init is called and success
                 false otherwise
    */

    static Boolean initICUSuccessful();

private:
    static Boolean _initAttempted;
    static Boolean _initSuccessful;

    static Mutex _initMutex;
};

#endif


PEGASUS_NAMESPACE_END

#endif