1 | /*
|
---|
2 | ============================================================================
|
---|
3 | fsinit.c -- Initialize file system
|
---|
4 | Version 9 -- 1988-01-31 -- D.N. Lynx Crowe
|
---|
5 | ============================================================================
|
---|
6 | */
|
---|
7 |
|
---|
8 | #define _FS_DEF_ /* define so that stdio.h and io.h get things right */
|
---|
9 |
|
---|
10 | #include "biosdefs.h"
|
---|
11 | #include "errno.h"
|
---|
12 | #include "io.h"
|
---|
13 | #include "stdio.h"
|
---|
14 | #include "stddefs.h"
|
---|
15 |
|
---|
16 | #include "memory.h"
|
---|
17 |
|
---|
18 | extern int16_t _bpbin, _dirin, _fatin, _dirmod, _fatmod;
|
---|
19 |
|
---|
20 | int16_t _badfd(void);
|
---|
21 | int16_t _noper(void);
|
---|
22 |
|
---|
23 | int8_t *Stdbufs; /* buffer chain pointer */
|
---|
24 |
|
---|
25 | int8_t Wrkbuf[BPSEC]; /* sector work buffer */
|
---|
26 |
|
---|
27 | int32_t Stdbuf[MAXDFILE][BUFSIZL]; /* standard buffers */
|
---|
28 |
|
---|
29 | FILE Cbuffs[NSTREAMS]; /* stream file control table */
|
---|
30 |
|
---|
31 | struct fcb _fcbtab[MAXDFILE]; /* fcb table */
|
---|
32 |
|
---|
33 | struct channel chantab[MAXCHAN]; /* channel table: relates fd's to devices */
|
---|
34 |
|
---|
35 | #if TBUFFER
|
---|
36 |
|
---|
37 | /* WARNING: this ONLY works for 512 byte sectors, 9 sectors per track */
|
---|
38 |
|
---|
39 | int16_t _b_tbuf[9][256]; /* the track buffer */
|
---|
40 |
|
---|
41 | int16_t _b_trak; /* current track */
|
---|
42 | int16_t _b_side; /* current side */
|
---|
43 | int16_t _b_sect; /* current sector */
|
---|
44 | int16_t _b_tsec; /* current base sector of current track */
|
---|
45 |
|
---|
46 | #endif
|
---|
47 |
|
---|
48 | /* |
---|
49 |
|
---|
50 | */
|
---|
51 |
|
---|
52 | /*
|
---|
53 | ============================================================================
|
---|
54 | _badfd() -- set "bad fd" error
|
---|
55 | ============================================================================
|
---|
56 | */
|
---|
57 |
|
---|
58 | int16_t _badfd(void)
|
---|
59 | {
|
---|
60 | errno = EBADF; /* set bad fd code */
|
---|
61 | return(FAILURE); /* return with an error indication */
|
---|
62 | }
|
---|
63 |
|
---|
64 | /*
|
---|
65 | ============================================================================
|
---|
66 | _noper() -- null return with no error condition
|
---|
67 | ============================================================================
|
---|
68 | */
|
---|
69 |
|
---|
70 | int16_t _noper(void)
|
---|
71 | {
|
---|
72 | return(SUCCESS); /* return with a non-error indication */
|
---|
73 | }
|
---|
74 |
|
---|
75 | /* |
---|
76 |
|
---|
77 | */
|
---|
78 |
|
---|
79 | /*
|
---|
80 | ============================================================================
|
---|
81 | InitCH() -- Initialize chantab structure entry
|
---|
82 | ============================================================================
|
---|
83 | */
|
---|
84 |
|
---|
85 | void InitCH(struct channel *cp, int8_t rdi, int8_t wri, int8_t ioi, int8_t ski, int16_t (*cfp)(), io_arg charg)
|
---|
86 | {
|
---|
87 | cp->c_read = rdi;
|
---|
88 | cp->c_write = wri;
|
---|
89 | cp->c_ioctl = ioi;
|
---|
90 | cp->c_seek = ski;
|
---|
91 | cp->c_close = cfp;
|
---|
92 | cp->c_arg = charg;
|
---|
93 | }
|
---|
94 |
|
---|
95 | /*
|
---|
96 | ============================================================================
|
---|
97 | Init_CB() -- Initialize Cbuff structure entry
|
---|
98 | ============================================================================
|
---|
99 | */
|
---|
100 |
|
---|
101 | void Init_CB(FILE *fp, int8_t unit, int8_t flags, int32_t *bufad, int16_t bufsize)
|
---|
102 | {
|
---|
103 | fp->_bp = (int8_t *)0L;
|
---|
104 | fp->_bend = (int8_t *)0L;
|
---|
105 | fp->_buff = (int8_t *)bufad;
|
---|
106 | fp->_flags = flags;
|
---|
107 | fp->_unit = unit;
|
---|
108 | fp->_bytbuf = 0;
|
---|
109 | fp->_buflen = bufsize;
|
---|
110 | };
|
---|
111 |
|
---|
112 | /* |
---|
113 |
|
---|
114 | */
|
---|
115 |
|
---|
116 | /*
|
---|
117 | ============================================================================
|
---|
118 | InitFS() -- Initialize file system
|
---|
119 | ============================================================================
|
---|
120 | */
|
---|
121 |
|
---|
122 | void InitFS(void)
|
---|
123 | {
|
---|
124 | register int16_t i;
|
---|
125 |
|
---|
126 | memset(_fcbtab, 0, sizeof _fcbtab); /* clear fcb table */
|
---|
127 | memsetw(Stdbuf, 0, sizeof Stdbuf / 2); /* clear buffers */
|
---|
128 |
|
---|
129 | Init_CB(stdin, _BUSY, 0, (int8_t *)0L, BUFSIZ); /* stdin */
|
---|
130 | Init_CB(stdout, _BUSY, 1, (int8_t *)0L, 1); /* stdout */
|
---|
131 | Init_CB(stderr, _BUSY, 2, (int8_t *)0L, 1); /* stderr */
|
---|
132 |
|
---|
133 | for (i = 3; i < NSTREAMS; i++)
|
---|
134 | Init_CB(&Cbuffs[i], 0, 0, (int8_t *)0L, 0);
|
---|
135 |
|
---|
136 | Stdbuf[0][0] = 0L; /* initialize the buffer list */
|
---|
137 |
|
---|
138 | for (i = 1; i < MAXDFILE; i++)
|
---|
139 | Stdbuf[i][0] = (int32_t)Stdbuf[i-1];
|
---|
140 |
|
---|
141 | Stdbufs = Stdbuf[MAXDFILE-1];
|
---|
142 |
|
---|
143 | InitCH(&chantab[0], 2, 0, 1, 0, _noper, (io_arg)CON_DEV ); /* 0 - stdin */
|
---|
144 | InitCH(&chantab[1], 0, 2, 1, 0, _noper, (io_arg)CON_DEV ); /* 1 - stdout */
|
---|
145 | InitCH(&chantab[2], 0, 2, 1, 0, _noper, (io_arg)CON_DEV ); /* 2 - stderr */
|
---|
146 |
|
---|
147 | for (i = 3; i < MAXCHAN; i++) /* 3..MAXCHAN-1 - not preassigned */
|
---|
148 | InitCH(&chantab[i], 0, 0, 0, 0, _badfd, (io_arg)0L );
|
---|
149 |
|
---|
150 | _bpbin = FALSE; /* BPB isn't in memory */
|
---|
151 | _dirin = FALSE; /* directory isn't in memory */
|
---|
152 | _fatin = FALSE; /* FAT isn't in memory */
|
---|
153 | _fatmod = FALSE; /* FAT hasn't been changed */
|
---|
154 | _dirmod = FALSE; /* directory hasn't been changed */
|
---|
155 |
|
---|
156 | #if TBUFFER
|
---|
157 | _b_trak = -1; /* no track in the buffer */
|
---|
158 | _b_side = -1; /* ... */
|
---|
159 | #endif
|
---|
160 | }
|
---|