1 #ident "$Id: file.h,v 1.4 2004/11/23 23:43:02 hpa Exp $"
2 /* ----------------------------------------------------------------------- *
4 * Copyright 2003-2004 H. Peter Anvin - All Rights Reserved
6 * Permission is hereby granted, free of charge, to any person
7 * obtaining a copy of this software and associated documentation
8 * files (the "Software"), to deal in the Software without
9 * restriction, including without limitation the rights to use,
10 * copy, modify, merge, publish, distribute, sublicense, and/or
11 * sell copies of the Software, and to permit persons to whom
12 * the Software is furnished to do so, subject to the following
15 * The above copyright notice and this permission notice shall
16 * be included in all copies or substantial portions of the Software.
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
20 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
21 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
22 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
23 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
24 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
25 * OTHER DEALINGS IN THE SOFTWARE.
27 * ----------------------------------------------------------------------- */
32 * Internal implementation of file I/O for COM32
35 #ifndef _COM32_SYS_FILE_H
36 #define _COM32_SYS_FILE_H
40 #include <sys/types.h>
44 /* Device structure; contains the relevant operations */
48 #define __DEV_MAGIC 0xf4e7
49 #define __DEV_TTY 0x0001 /* TTY - must be bit 0 */
50 #define __DEV_FILE 0x0002 /* Ordinary file */
51 #define __DEV_OUTPUT 0x0004 /* This is an output device */
52 #define __DEV_INPUT 0 /* Dummy */
53 #define __DEV_ERROR 0x0008 /* This is the error device */
54 #define __DEV_NULL 0x0010 /* This is the null device */
57 uint16_t dev_magic; /* Magic number */
58 uint16_t flags; /* Flags */
59 int fileflags; /* Permitted file flags */
60 ssize_t (*read)(struct file_info *, void *, size_t);
61 int (*close)(struct file_info *);
64 uint16_t dev_magic; /* Magic number */
65 uint16_t flags; /* Flags */
67 ssize_t (*write)(struct file_info *, const void *, size_t);
68 int (*close)(struct file_info *);
73 #define NFILES 32 /* Number of files to support */
74 #define MAXBLOCK 16384 /* Defined by ABI */
77 const struct input_dev *iop; /* Input operations */
78 const struct output_dev *oop; /* Output operations */
80 /* Structure used for input blocking */
82 int blocklg2; /* Blocksize log 2 */
83 size_t offset; /* Current file offset */
84 size_t length; /* Total file length */
85 uint16_t filedes; /* File descriptor */
86 uint16_t _filler; /* Unused */
87 size_t nbytes; /* Number of bytes available in buffer */
88 char *datap; /* Current data pointer */
93 extern struct file_info __file_info[NFILES];
95 /* Line input discipline */
96 ssize_t __line_input(struct file_info *fp, char *buf, size_t bufsize,
97 ssize_t (*get_char)(struct file_info *, void *, size_t));
99 #endif /* _COM32_SYS_FILE_H */