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

1.1       root        1: /*
                      2:  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
                      3:  *
                      4:  * @APPLE_LICENSE_HEADER_START@
                      5:  * 
                      6:  * The contents of this file constitute Original Code as defined in and
                      7:  * are subject to the Apple Public Source License Version 1.1 (the
                      8:  * "License").  You may not use this file except in compliance with the
                      9:  * License.  Please obtain a copy of the License at
                     10:  * http://www.apple.com/publicsource and read it before using this file.
                     11:  * 
                     12:  * This Original Code and all software distributed under the License are
                     13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
                     14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
                     15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
                     16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
                     17:  * License for the specific language governing rights and limitations
                     18:  * under the License.
                     19:  * 
                     20:  * @APPLE_LICENSE_HEADER_END@
                     21:  */
                     22: /* ================================================================ */
                     23: /*
                     24: File:  ConvertUTF.h
                     25: Author: Mark E. Davis
                     26: Copyright (C) 1994 Taligent, Inc. All rights reserved.
                     27: 
                     28: This code is copyrighted. Under the copyright laws, this code may not
                     29: be copied, in whole or part, without prior written consent of Taligent. 
                     30: 
                     31: Taligent grants the right to use or reprint this code as long as this
                     32: ENTIRE copyright notice is reproduced in the code or reproduction.
                     33: The code is provided AS-IS, AND TALIGENT DISCLAIMS ALL WARRANTIES,
                     34: EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO IMPLIED
                     35: WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  IN
                     36: NO EVENT WILL TALIGENT BE LIABLE FOR ANY DAMAGES WHATSOEVER (INCLUDING,
                     37: WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS PROFITS, BUSINESS
                     38: INTERRUPTION, LOSS OF BUSINESS INFORMATION, OR OTHER PECUNIARY
                     39: LOSS) ARISING OUT OF THE USE OR INABILITY TO USE THIS CODE, EVEN
                     40: IF TALIGENT HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
                     41: BECAUSE SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF
                     42: LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES, THE ABOVE
                     43: LIMITATION MAY NOT APPLY TO YOU.
                     44: 
                     45: RESTRICTED RIGHTS LEGEND: Use, duplication, or disclosure by the
                     46: government is subject to restrictions as set forth in subparagraph
                     47: (c)(l)(ii) of the Rights in Technical Data and Computer Software
                     48: clause at DFARS 252.227-7013 and FAR 52.227-19.
                     49: 
                     50: This code may be protected by one or more U.S. and International
                     51: Patents.
                     52: 
                     53: TRADEMARKS: Taligent and the Taligent Design Mark are registered
                     54: trademarks of Taligent, Inc.
                     55: */
                     56: /* ================================================================ */
                     57: 
                     58: // #include <types.h>
                     59: 
                     60: /* ================================================================ */
                     61: /*     The following 4 definitions are compiler-specific.
                     62:        I would use wchar_t for UCS2/UTF16, except that the C standard
                     63:        does not guarantee that it has at least 16 bits, so wchar_t is
                     64:        no less portable than unsigned short!
                     65: */
                     66: 
                     67: typedef unsigned long  UCS4;
                     68: typedef unsigned short UCS2;
                     69: typedef unsigned short UTF16;
                     70: typedef unsigned char  UTF8;
                     71: 
                     72: /*
                     73: const UCS4 kReplacementCharacter =     0x0000FFFDUL;
                     74: const UCS4 kMaximumUCS2 =                      0x0000FFFFUL;
                     75: const UCS4 kMaximumUTF16 =                     0x0010FFFFUL;
                     76: const UCS4 kMaximumUCS4 =                      0x7FFFFFFFUL;
                     77: */
                     78: 
                     79: /* ================================================================ */
                     80: /*     Each of these routines converts the text between *sourceStart and 
                     81: sourceEnd, putting the result into the buffer between *targetStart and
                     82: targetEnd. Note: the end pointers are *after* the last item: e.g. 
                     83: *(sourceEnd - 1) is the last item.
                     84: 
                     85:        The return result indicates whether the conversion was successful,
                     86: and if not, whether the problem was in the source or target buffers.
                     87: 
                     88:        After the conversion, *sourceStart and *targetStart are both
                     89: updated to point to the end of last text successfully converted in
                     90: the respective buffers.
                     91: */
                     92: 
                     93: typedef enum {
                     94:        ok,                             /* conversion successful */
                     95:        sourceExhausted,        /* partial character in source, but hit end */
                     96:        targetExhausted         /* insuff. room in target for conversion */
                     97: } ConversionResult;
                     98: 
                     99: ConversionResult       ConvertUTF16toUTF8 (
                    100:                UTF16** sourceStart, const UTF16* sourceEnd, 
                    101:                UTF8** targetStart, const UTF8* targetEnd);
                    102:                
                    103: ConversionResult       ConvertUTF8toUTF16 (
                    104:                UTF8** sourceStart, UTF8* sourceEnd, 
                    105:                UTF16** targetStart, const UTF16* targetEnd);
                    106: 
                    107: /* ================================================================ */

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