Rev 359 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 548 | serge | 1 | /**************************************************************************** |
| 2 | * |
||
| 3 | * Open Watcom Project |
||
| 4 | * |
||
| 5 | * Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved. |
||
| 6 | * |
||
| 7 | * ======================================================================== |
||
| 8 | * |
||
| 9 | * This file contains Original Code and/or Modifications of Original |
||
| 10 | * Code as defined in and that are subject to the Sybase Open Watcom |
||
| 11 | * Public License version 1.0 (the 'License'). You may not use this file |
||
| 12 | * except in compliance with the License. BY USING THIS FILE YOU AGREE TO |
||
| 13 | * ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is |
||
| 14 | * provided with the Original Code and Modifications, and is also |
||
| 15 | * available at www.sybase.com/developer/opensource. |
||
| 16 | * |
||
| 17 | * The Original Code and all software distributed under the License are |
||
| 18 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
||
| 19 | * EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM |
||
| 20 | * ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF |
||
| 21 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR |
||
| 22 | * NON-INFRINGEMENT. Please see the License for the specific language |
||
| 23 | * governing rights and limitations under the License.* |
||
| 24 | * ======================================================================== |
||
| 25 | * |
||
| 26 | * Description: low level lseek without file extend for Windows NT |
||
| 27 | * |
||
| 28 | ****************************************************************************/ |
||
| 29 | |||
| 30 | |||
| 31 | #include "variety.h" |
||
| 32 | #include |
||
| 33 | #include |
||
| 34 | #include "iomode.h" |
||
| 35 | #include "rtcheck.h" |
||
| 36 | #include "seterrno.h" |
||
| 37 | #include "lseek.h" |
||
| 38 | #include "handleio.h" |
||
| 39 | |||
| 40 | /* |
||
| 41 | DWORD SetFilePointer( |
||
| 42 | HANDLE hFile, // handle to file |
||
| 43 | LONG lDistanceToMove, // bytes to move pointer |
||
| 44 | PLONG lpDistanceToMoveHigh, // bytes to move pointer |
||
| 45 | DWORD dwMoveMethod // starting point |
||
| 46 | ); |
||
| 47 | */ |
||
| 48 | |||
| 49 | #ifndef INVALID_SET_FILE_POINTER |
||
| 50 | #define INVALID_SET_FILE_POINTER 0xFFFFFFFF |
||
| 51 | #endif |
||
| 52 | |||
| 53 | typedef struct |
||
| 54 | { |
||
| 55 | char *name; |
||
| 56 | unsigned int offset; |
||
| 57 | }__file_handle; |
||
| 58 | |||
| 59 | typedef struct |
||
| 60 | { DWORD attr; |
||
| 61 | DWORD flags; |
||
| 62 | DWORD cr_time; |
||
| 63 | DWORD cr_date; |
||
| 64 | DWORD acc_time; |
||
| 65 | DWORD acc_date; |
||
| 66 | DWORD mod_time; |
||
| 67 | DWORD mod_date; |
||
| 68 | DWORD size; |
||
| 69 | DWORD size_high; |
||
| 70 | } FILEINFO; |
||
| 71 | |||
| 72 | int _stdcall get_fileinfo(const char *name,FILEINFO* pinfo); |
||
| 73 | |||
| 74 | _WCRTLINK long __lseek( int hid, long offset, int origin ) |
||
| 75 | { |
||
| 76 | __file_handle *fh; |
||
| 77 | long rc; |
||
| 78 | |||
| 79 | __handle_check( hid, -1 ); |
||
| 80 | fh = (__file_handle*) __getOSHandle( hid ); |
||
| 81 | |||
| 82 | switch(origin) |
||
| 83 | { |
||
| 84 | case SEEK_SET: |
||
| 85 | rc = offset; |
||
| 86 | break; |
||
| 87 | case SEEK_CUR: |
||
| 88 | rc = fh->offset + offset; |
||
| 89 | break; |
||
| 90 | case SEEK_END: |
||
| 91 | { |
||
| 92 | FILEINFO info; |
||
| 93 | get_fileinfo(fh->name,&info); |
||
| 94 | rc = offset + info.size; |
||
| 95 | break; |
||
| 96 | } |
||
| 97 | default: |
||
| 98 | return -1; |
||
| 99 | }; |
||
| 100 | |||
| 101 | fh->offset = rc; |
||
| 102 | |||
| 103 | return( rc ); |
||
| 104 | } |
||
| 105 |