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Annotation of kernel/bsd/hfs/hfscommon/Unicode/ConvertUTF.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
        !             7:  * Reserved.  This file contains Original Code and/or Modifications of
        !             8:  * Original Code as defined in and that are subject to the Apple Public
        !             9:  * Source License Version 1.1 (the "License").  You may not use this file
        !            10:  * except in compliance with the License.  Please obtain a copy of the
        !            11:  * License at http://www.apple.com/publicsource and read it before using
        !            12:  * this file.
        !            13:  * 
        !            14:  * The Original Code and all software distributed under the License are
        !            15:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            19:  * License for the specific language governing rights and limitations
        !            20:  * under the License.
        !            21:  * 
        !            22:  * @APPLE_LICENSE_HEADER_END@
        !            23:  */
        !            24: 
        !            25: /* ================================================================ */
        !            26: /*
        !            27: File:  ConvertUTF.h
        !            28: Author: Mark E. Davis
        !            29: Copyright (C) 1994 Taligent, Inc. All rights reserved.
        !            30: 
        !            31: This code is copyrighted. Under the copyright laws, this code may not
        !            32: be copied, in whole or part, without prior written consent of Taligent. 
        !            33: 
        !            34: Taligent grants the right to use or reprint this code as long as this
        !            35: ENTIRE copyright notice is reproduced in the code or reproduction.
        !            36: The code is provided AS-IS, AND TALIGENT DISCLAIMS ALL WARRANTIES,
        !            37: EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO IMPLIED
        !            38: WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  IN
        !            39: NO EVENT WILL TALIGENT BE LIABLE FOR ANY DAMAGES WHATSOEVER (INCLUDING,
        !            40: WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS PROFITS, BUSINESS
        !            41: INTERRUPTION, LOSS OF BUSINESS INFORMATION, OR OTHER PECUNIARY
        !            42: LOSS) ARISING OUT OF THE USE OR INABILITY TO USE THIS CODE, EVEN
        !            43: IF TALIGENT HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
        !            44: BECAUSE SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF
        !            45: LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES, THE ABOVE
        !            46: LIMITATION MAY NOT APPLY TO YOU.
        !            47: 
        !            48: RESTRICTED RIGHTS LEGEND: Use, duplication, or disclosure by the
        !            49: government is subject to restrictions as set forth in subparagraph
        !            50: (c)(l)(ii) of the Rights in Technical Data and Computer Software
        !            51: clause at DFARS 252.227-7013 and FAR 52.227-19.
        !            52: 
        !            53: This code may be protected by one or more U.S. and International
        !            54: Patents.
        !            55: 
        !            56: TRADEMARKS: Taligent and the Taligent Design Mark are registered
        !            57: trademarks of Taligent, Inc.
        !            58: */
        !            59: /* ================================================================ */
        !            60: 
        !            61: // #include <types.h>
        !            62: 
        !            63: /* ================================================================ */
        !            64: /*     The following 4 definitions are compiler-specific.
        !            65:        I would use wchar_t for UCS2/UTF16, except that the C standard
        !            66:        does not guarantee that it has at least 16 bits, so wchar_t is
        !            67:        no less portable than unsigned short!
        !            68: */
        !            69: 
        !            70: typedef unsigned long  UCS4;
        !            71: typedef unsigned short UCS2;
        !            72: typedef unsigned short UTF16;
        !            73: typedef unsigned char  UTF8;
        !            74: 
        !            75: /*
        !            76: const UCS4 kReplacementCharacter =     0x0000FFFDUL;
        !            77: const UCS4 kMaximumUCS2 =                      0x0000FFFFUL;
        !            78: const UCS4 kMaximumUTF16 =                     0x0010FFFFUL;
        !            79: const UCS4 kMaximumUCS4 =                      0x7FFFFFFFUL;
        !            80: */
        !            81: 
        !            82: /* ================================================================ */
        !            83: /*     Each of these routines converts the text between *sourceStart and 
        !            84: sourceEnd, putting the result into the buffer between *targetStart and
        !            85: targetEnd. Note: the end pointers are *after* the last item: e.g. 
        !            86: *(sourceEnd - 1) is the last item.
        !            87: 
        !            88:        The return result indicates whether the conversion was successful,
        !            89: and if not, whether the problem was in the source or target buffers.
        !            90: 
        !            91:        After the conversion, *sourceStart and *targetStart are both
        !            92: updated to point to the end of last text successfully converted in
        !            93: the respective buffers.
        !            94: */
        !            95: 
        !            96: typedef enum {
        !            97:        ok,                             /* conversion successful */
        !            98:        sourceExhausted,        /* partial character in source, but hit end */
        !            99:        targetExhausted         /* insuff. room in target for conversion */
        !           100: } ConversionResult;
        !           101: 
        !           102: ConversionResult       ConvertUTF16toUTF8 (
        !           103:                UTF16** sourceStart, const UTF16* sourceEnd, 
        !           104:                UTF8** targetStart, const UTF8* targetEnd);
        !           105:                
        !           106: ConversionResult       ConvertUTF8toUTF16 (
        !           107:                UTF8** sourceStart, UTF8* sourceEnd, 
        !           108:                UTF16** targetStart, const UTF16* targetEnd);
        !           109: 
        !           110: /* ================================================================ */

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