1 #ifndef MTOOLS_STREAM_H 2 #define MTOOLS_STREAM_H 3 4 /* Copyright 1996-1999,2001,2002,2005,2006,2008,2009,2011 Alain Knaff. 5 * This file is part of mtools. 6 * 7 * Mtools is free software: you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation, either version 3 of the License, or 10 * (at your option) any later version. 11 * 12 * Mtools is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with Mtools. If not, see <http://www.gnu.org/licenses/>. 19 */ 20 21 typedef struct Stream_t { 22 struct Class_t *Class; 23 int refs; 24 struct Stream_t *Next; 25 } Stream_t; 26 27 #include "mtools.h" 28 #include "msdos.h" 29 #include "device.h" 30 #include "llong.h" 31 32 void limitSizeToOffT(size_t *len, mt_off_t maxLen); 33 34 doscp_t *get_dosConvert_pass_through(Stream_t *Stream); 35 36 typedef struct Class_t { 37 ssize_t (*read)(Stream_t *, char *, size_t); 38 ssize_t (*write)(Stream_t *, char *, size_t); 39 ssize_t (*pread)(Stream_t *, char *, mt_off_t, size_t); 40 ssize_t (*pwrite)(Stream_t *, char *, mt_off_t, size_t); 41 int (*flush)(Stream_t *); 42 int (*freeFunc)(Stream_t *); 43 int (*set_geom)(Stream_t *, device_t *, device_t *); 44 int (*get_data)(Stream_t *, time_t *, mt_off_t *, int *, uint32_t *); 45 int (*pre_allocate)(Stream_t *, mt_off_t); 46 47 doscp_t *(*get_dosConvert)(Stream_t *); 48 49 int (*discard)(Stream_t *); 50 } Class_t; 51 52 #define READS(stream, buf, size) \ 53 ((stream)->Class->read)( (stream), (char *) (buf), (size) ) 54 55 #define WRITES(stream, buf, size) \ 56 ((stream)->Class->write)( (stream), (char *) (buf), (size) ) 57 58 #define PREADS(stream, buf, address, size) \ 59 ((stream)->Class->pread)( (stream), (char *) (buf), (address), (size) ) 60 61 #define PWRITES(stream, buf, address, size) \ 62 ((stream)->Class->pwrite)( (stream), (char *) (buf), (address), (size) ) 63 64 #define SET_GEOM(stream, dev, orig_dev) \ 65 (stream)->Class->set_geom( (stream), (dev), (orig_dev)) 66 67 #define GET_DATA(stream, date, size, type, address) \ 68 (stream)->Class->get_data( (stream), (date), (size), (type), (address) ) 69 70 #define PRE_ALLOCATE(stream, size) \ 71 (stream)->Class->pre_allocate((stream), (size)) 72 73 #define GET_DOSCONVERT(stream) \ 74 (stream)->Class->get_dosConvert((stream)) 75 76 #define DISCARD(stream) \ 77 (stream)->Class->discard((stream)) 78 79 int flush_stream(Stream_t *Stream); 80 Stream_t *copy_stream(Stream_t *Stream); 81 int free_stream(Stream_t **Stream); 82 83 #define FLUSH(stream) \ 84 flush_stream( (stream) ) 85 86 #define FREE(stream) \ 87 free_stream( (stream) ) 88 89 #define COPY(stream) \ 90 copy_stream( (stream) ) 91 92 93 #define DeclareThis(x) x *This = (x *) Stream 94 95 void init_head(Stream_t *Stream, struct Class_t *Class, Stream_t *Next); 96 97 ssize_t force_pwrite(Stream_t *Stream, char *buf, mt_off_t start, size_t len); 98 ssize_t force_pread(Stream_t *Stream, char *buf, mt_off_t start, size_t len); 99 100 ssize_t force_write(Stream_t *Stream, char *buf, size_t len); 101 102 int set_geom_pass_through(Stream_t *Stream, device_t *dev, device_t *orig_dev); 103 104 int set_geom_noop(Stream_t *Stream, device_t *dev, device_t *orig_dev); 105 106 int get_data_pass_through(Stream_t *Stream, time_t *date, mt_off_t *size, 107 int *type, uint32_t *address); 108 109 ssize_t pread_pass_through(Stream_t *Stream, char *buf, 110 mt_off_t start, size_t len); 111 ssize_t pwrite_pass_through(Stream_t *Stream, char *buf, 112 mt_off_t start, size_t len); 113 114 mt_off_t getfree(Stream_t *Stream); 115 int getfreeMinBytes(Stream_t *Stream, mt_off_t ref); 116 117 Stream_t *find_device(char drive, int mode, struct device *out_dev, 118 union bootsector *boot, 119 char *name, int *media, mt_off_t *maxSize, 120 int *isRop); 121 122 int adjust_tot_sectors(struct device *dev, mt_off_t offset, char *errmsg); 123 124 #endif 125 126