Rev 614 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
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| 614 | serge | 1 | /**************************************************************************** |
| 2 | * |
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| 3 | * Open Watcom Project |
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| 4 | * |
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| 5 | * Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved. |
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| 6 | * |
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| 7 | * ======================================================================== |
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| 8 | * |
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| 9 | * This file contains Original Code and/or Modifications of Original |
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| 10 | * Code as defined in and that are subject to the Sybase Open Watcom |
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| 11 | * Public License version 1.0 (the 'License'). You may not use this file |
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| 12 | * except in compliance with the License. BY USING THIS FILE YOU AGREE TO |
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| 13 | * ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is |
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| 14 | * provided with the Original Code and Modifications, and is also |
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| 15 | * available at www.sybase.com/developer/opensource. |
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| 16 | * |
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| 17 | * The Original Code and all software distributed under the License are |
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| 18 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
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| 19 | * EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM |
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| 20 | * ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF |
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| 21 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR |
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| 22 | * NON-INFRINGEMENT. Please see the License for the specific language |
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| 23 | * governing rights and limitations under the License. |
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| 24 | * |
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| 25 | * ======================================================================== |
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| 26 | * |
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| 27 | * Description: WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE |
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| 28 | * DESCRIBE IT HERE! |
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| 29 | * |
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| 30 | ****************************************************************************/ |
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| 31 | |||
| 32 | |||
| 33 | #include "variety.h" |
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| 34 | #include |
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| 35 | #include |
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| 36 | #include |
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| 37 | #include |
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| 38 | #include "iomode.h" |
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| 39 | #include "fileacc.h" |
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| 40 | #include "rtcheck.h" |
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| 41 | #include "rtdata.h" |
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| 42 | #include "seterrno.h" |
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| 43 | #include "lseek.h" |
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| 727 | serge | 44 | #include "kolibri.h" |
| 614 | serge | 45 | |
| 46 | typedef struct |
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| 47 | { |
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| 48 | char *name; |
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| 49 | unsigned int offset; |
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| 50 | }__file_handle; |
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| 51 | |||
| 52 | _WCRTLINK int read( int handle, void *buf, unsigned len ) |
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| 53 | { |
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| 54 | unsigned read_len, total_len; |
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| 55 | unsigned reduce_idx, finish_idx; |
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| 56 | unsigned iomode_flags; |
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| 57 | char *buffer = buf; |
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| 58 | BOOL rc; |
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| 59 | HANDLE h; |
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| 60 | unsigned amount_read; |
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| 727 | serge | 61 | int err; |
| 62 | |||
| 614 | serge | 63 | __file_handle *fh; |
| 64 | |||
| 727 | serge | 65 | |
| 614 | serge | 66 | __handle_check( handle, -1 ); |
| 67 | __ChkTTYIOMode( handle ); |
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| 68 | iomode_flags = __GetIOMode( handle ); |
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| 69 | if( iomode_flags == 0 ) |
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| 70 | { |
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| 71 | __set_errno( EBADF ); |
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| 72 | return( -1 ); |
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| 73 | } |
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| 74 | if( !(iomode_flags & _READ) ) |
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| 75 | { |
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| 76 | __set_errno( EACCES ); /* changed from EBADF to EACCES 23-feb-89 */ |
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| 77 | return( -1 ); |
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| 78 | } |
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| 79 | |||
| 80 | |||
| 81 | fh = (__file_handle*) __getOSHandle( handle ); |
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| 82 | |||
| 83 | if( iomode_flags & _BINARY ) /* if binary mode */ |
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| 84 | { |
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| 85 | |||
| 727 | serge | 86 | err=read_file(fh->name,buffer,fh->offset,len,&amount_read); |
| 87 | fh->offset+=amount_read; |
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| 88 | total_len = amount_read; |
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| 89 | |||
| 90 | if(err) |
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| 614 | serge | 91 | if ( amount_read == 0) |
| 92 | return (-1); |
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| 727 | serge | 93 | |
| 614 | serge | 94 | } |
| 95 | else |
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| 96 | { |
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| 97 | total_len = 0; |
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| 98 | read_len = len; |
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| 99 | do |
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| 100 | { |
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| 727 | serge | 101 | err=read_file(fh->name,buffer,fh->offset,len,&amount_read); |
| 102 | fh->offset+=amount_read; |
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| 103 | |||
| 104 | if( amount_read == 0 ) |
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| 105 | break; /* EOF */ |
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| 106 | |||
| 614 | serge | 107 | reduce_idx = 0; |
| 108 | finish_idx = reduce_idx; |
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| 109 | for( ; reduce_idx < amount_read; ++reduce_idx ) |
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| 110 | { |
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| 111 | if( buffer[ reduce_idx ] == 0x1a ) /* EOF */ |
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| 112 | { |
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| 113 | __lseek( handle, |
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| 114 | ((long)reduce_idx - (long)amount_read)+1L, |
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| 115 | SEEK_CUR ); |
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| 116 | total_len += finish_idx; |
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| 117 | return( total_len ); |
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| 118 | } |
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| 119 | if( buffer[ reduce_idx ] != '\r' ) |
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| 120 | { |
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| 121 | buffer[ finish_idx++ ] = buffer[ reduce_idx ]; |
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| 122 | }; |
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| 123 | } |
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| 124 | |||
| 125 | total_len += finish_idx; |
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| 126 | buffer += finish_idx; |
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| 127 | read_len -= finish_idx; |
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| 128 | if( iomode_flags & _ISTTY ) |
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| 129 | { |
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| 130 | break; /* 04-feb-88, FWC */ |
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| 131 | } |
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| 132 | } while( read_len != 0 ); |
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| 133 | } |
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| 134 | return( total_len ); |
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| 135 | } |
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| 136 |