//%2005////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2000, 2001, 2002 BMC Software; Hewlett-Packard Development
// Company, L.P.; IBM Corp.; The Open Group; Tivoli Systems.
// Copyright (c) 2003 BMC Software; Hewlett-Packard Development Company, L.P.;
// IBM Corp.; EMC Corporation, The Open Group.
// Copyright (c) 2004 BMC Software; Hewlett-Packard Development Company, L.P.;
// IBM Corp.; EMC Corporation; VERITAS Software Corporation; The Open Group.
// Copyright (c) 2005 Hewlett-Packard Development Company, L.P.; IBM Corp.;
// EMC Corporation; VERITAS Software Corporation; The Open Group.
//
// 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.
//
//==============================================================================
//
// Author: Dave Rosckes   (rosckes@us.ibm.com)
//
// Modified By: Yi Zhou Hewlett-Packard Company (yi.zhou@hp.com)
//
//%/////////////////////////////////////////////////////////////////////////////

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

#ifdef PEGASUS_USE_EXPERIMENTAL_INTERFACES

PEGASUS_NAMESPACE_BEGIN

#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

static const Uint32 halfBase = 0x0010000UL;
static const Uint32 halfMask = 0x3FFUL;
static const int halfShift  = 10;
static const Uint8 firstByteMark[7] = { 0x00, 0x00, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC };

static const Uint32 offsetsFromUTF8[6] = { 0x00000000UL, 0x00003080UL, 0x000E2080UL,
             0x03C82080UL, 0xFA082080UL, 0x82082080UL };

static const char trailingBytesForUTF8[256] = {
    0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
    0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
    0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
    0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
    0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
    0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
    2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 3,3,3,3,3,3,3,3,4,4,4,4,5,5,5,5
};

#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  // PEGASUS_USE_EXPERIMENTAL_INTERFACES

#endif