Alistair Delva | beaee83 | 2021-02-24 11:27:23 -0800 | [diff] [blame] | 1 | /* Copyright 1996,1997,1999,2001,2002,2008,2009 Alain Knaff. |
| 2 | * This file is part of mtools. |
| 3 | * |
| 4 | * Mtools is free software: you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License as published by |
| 6 | * the Free Software Foundation, either version 3 of the License, or |
| 7 | * (at your option) any later version. |
| 8 | * |
| 9 | * Mtools is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with Mtools. If not, see <http://www.gnu.org/licenses/>. |
| 16 | */ |
| 17 | |
| 18 | #include "sysincludes.h" |
| 19 | #include "msdos.h" |
| 20 | #include "stream.h" |
| 21 | |
| 22 | int batchmode = 0; |
| 23 | |
| 24 | int flush_stream(Stream_t *Stream) |
| 25 | { |
| 26 | int ret=0; |
| 27 | if(!batchmode) { |
| 28 | if(Stream->Class->flush) |
| 29 | ret |= Stream->Class->flush(Stream); |
| 30 | if(Stream->Next) |
| 31 | ret |= flush_stream(Stream->Next); |
| 32 | } |
| 33 | return ret; |
| 34 | } |
| 35 | |
| 36 | Stream_t *copy_stream(Stream_t *Stream) |
| 37 | { |
| 38 | if(Stream) |
| 39 | Stream->refs++; |
| 40 | return Stream; |
| 41 | } |
| 42 | |
| 43 | int free_stream(Stream_t **Stream) |
| 44 | { |
| 45 | int ret=0; |
| 46 | |
| 47 | if(!*Stream) |
| 48 | return -1; |
| 49 | if(! --(*Stream)->refs){ |
| 50 | if((*Stream)->Class->flush) |
| 51 | ret |= (*Stream)->Class->flush(*Stream); |
| 52 | if((*Stream)->Class->freeFunc) |
| 53 | ret |= (*Stream)->Class->freeFunc(*Stream); |
| 54 | if((*Stream)->Next) |
| 55 | ret |= free_stream(&(*Stream)->Next); |
| 56 | Free(*Stream); |
| 57 | } else if ( (*Stream)->Next ) |
| 58 | ret |= flush_stream((*Stream)->Next); |
| 59 | *Stream = NULL; |
| 60 | return ret; |
| 61 | } |
| 62 | |
| 63 | |
| 64 | #define GET_DATA(stream, date, size, type, address) \ |
| 65 | (stream)->Class->get_data( (stream), (date), (size), (type), (address) ) |
| 66 | |
| 67 | |
| 68 | int get_data_pass_through(Stream_t *Stream, time_t *date, mt_size_t *size, |
| 69 | int *type, int *address) |
| 70 | { |
| 71 | return GET_DATA(Stream->Next, date, size, type, address); |
| 72 | } |
| 73 | |
| 74 | int read_pass_through(Stream_t *Stream, char *buf, mt_off_t start, size_t len) |
| 75 | { |
| 76 | return READS(Stream->Next, buf, start, len); |
| 77 | } |
| 78 | |
| 79 | int write_pass_through(Stream_t *Stream, char *buf, mt_off_t start, size_t len) |
| 80 | { |
| 81 | return WRITES(Stream->Next, buf, start, len); |
| 82 | } |
| 83 | |
| 84 | doscp_t *get_dosConvert_pass_through(Stream_t *Stream) |
| 85 | { |
| 86 | return GET_DOSCONVERT(Stream->Next); |
| 87 | } |