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
read_filter(Stream_t * Stream,char * buf,size_t len)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
open_dos2unix(Stream_t * Next,int convertCharset UNUSEDP)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 }
87