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Annotation of kernel/bsd/hfs/hfscommon/Unicode/ConvertUTF.h, revision 1.1.1.1

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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