// © 2016 and later: Unicode, Inc. and others.

// License & terms of use: http://www.unicode.org/copyright.html

/*

*******************************************************************************

*   Copyright (C) 2015-2016, International Business Machines

*   Corporation and others.  All Rights Reserved.

*******************************************************************************

*   file name:  charstr.cpp

*/

#include "unicode/utypes.h"

#include "unicode/putil.h"

#include "unicode/unistr.h"

#include "cstr.h"

#include "charstr.h"

#include "uinvchar.h"

U_NAMESPACE_BEGIN

CStr::CStr(const UnicodeString &in) {

    UErrorCode status = U_ZERO_ERROR;

#if !UCONFIG_NO_CONVERSION || U_CHARSET_IS_UTF8

    int32_t length = in.extract(0, in.length(), static_cast<char *>(NULL), static_cast<uint32_t>(0));

    int32_t resultCapacity = 0;

    char *buf = s.getAppendBuffer(length, length, resultCapacity, status);

    if (U_SUCCESS(status)) {

        in.extract(0, in.length(), buf, resultCapacity);

        s.append(buf, length, status);

    }

#else

    // No conversion available. Convert any invariant characters; substitute '?' for the rest.

    // Note: can't just call u_UCharsToChars() or CharString.appendInvariantChars() on the 

    //       whole string because they require that the entire input be invariant.

    char buf[2];

    for (int i=0; i<in.length(); i = in.moveIndex32(i, 1)) {

        if (uprv_isInvariantUString(in.getBuffer()+i, 1)) {

            u_UCharsToChars(in.getBuffer()+i, buf, 1);

        } else {

            buf[0] = '?';

        }

        s.append(buf, 1, status);

    }

#endif

}

CStr::~CStr() {

}

const char * CStr::operator ()() const {

    return s.data();

}

U_NAMESPACE_END