Yi Kong | 39bbd96 | 2022-01-09 19:41:38 +0800 | [diff] [blame] | 1 | /* Copyright 1996,1997,1999,2001-2003,2008,2009,2021 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 "mtools.h" |
| 21 | #include "codepage.h" |
| 22 | |
| 23 | typedef struct Filter_t { |
| 24 | struct Stream_t head; |
| 25 | |
| 26 | int mode; |
| 27 | /* int convertCharset; */ |
| 28 | } Filter_t; |
| 29 | |
| 30 | /* read filter filters out messy dos' bizarre end of lines and final 0x1a's */ |
| 31 | |
| 32 | static ssize_t read_filter(Stream_t *Stream, char *buf, size_t len) |
| 33 | { |
| 34 | DeclareThis(Filter_t); |
| 35 | size_t i,j; |
| 36 | ssize_t ret; |
| 37 | char newchar; |
| 38 | |
| 39 | ret = READS(This->head.Next, buf, len); |
| 40 | if ( ret < 0 ) |
| 41 | return ret; |
| 42 | |
| 43 | j = 0; |
| 44 | for (i=0; i< (size_t) ret; i++){ |
| 45 | if ( buf[i] == '\r' ) |
| 46 | continue; |
| 47 | if (buf[i] == 0x1a) |
| 48 | break; |
| 49 | newchar = buf[i]; |
| 50 | /* |
| 51 | if (This->convertCharset) newchar = contents_to_unix(newchar); |
| 52 | */ |
| 53 | buf[j++] = newchar; |
| 54 | } |
| 55 | |
| 56 | return (ssize_t) j; |
| 57 | } |
| 58 | |
| 59 | static Class_t FilterClass = { |
| 60 | read_filter, |
| 61 | 0, |
| 62 | 0, |
| 63 | 0, |
| 64 | 0, /* flush */ |
| 65 | 0, |
| 66 | 0, /* set geometry */ |
| 67 | get_data_pass_through, |
| 68 | 0, |
| 69 | 0, /* get_dosconvert */ |
| 70 | 0 /* discard */ |
| 71 | }; |
| 72 | |
| 73 | Stream_t *open_dos2unix(Stream_t *Next, int convertCharset UNUSEDP) |
| 74 | { |
| 75 | Filter_t *This; |
| 76 | |
| 77 | This = New(Filter_t); |
| 78 | if (!This) |
| 79 | return NULL; |
| 80 | init_head(&This->head, &FilterClass, Next); |
| 81 | /* |
| 82 | This->convertCharset = convertCharset; |
| 83 | */ |
| 84 | |
| 85 | return &This->head; |
| 86 | } |