source: buchla-68k/libcio/fsinit.c@ 4a17aeb

Last change on this file since 4a17aeb was 4a17aeb, checked in by Thomas Lopatic <thomas@…>, 8 years ago

Prototypes for I/O dispatch pointers.
  • Property mode set to 100644
File size: 4.6 KB
Line 
1/*
2 ============================================================================
3 fsinit.c -- Initialize file system
4 Version 9 -- 1988-01-31 -- D.N. Lynx Crowe
5 ============================================================================
6*/
7
8#include "ram.h"
9
10int8_t *Stdbufs; /* buffer chain pointer */
11
12int8_t Wrkbuf[BPSEC]; /* sector work buffer */
13
14int32_t Stdbuf[MAXDFILE][BUFSIZL]; /* standard buffers */
15
16FILE Cbuffs[NSTREAMS]; /* stream file control table */
17
18struct fcb _fcbtab[MAXDFILE]; /* fcb table */
19
20struct channel chantab[MAXCHAN]; /* channel table: relates fd's to devices */
21
22#if TBUFFER
23
24/* WARNING: this ONLY works for 512 byte sectors, 9 sectors per track */
25
26int16_t _b_tbuf[9][256]; /* the track buffer */
27
28int16_t _b_trak; /* current track */
29int16_t _b_side; /* current side */
30int16_t _b_sect; /* current sector */
31int16_t _b_tsec; /* current base sector of current track */
32
33#endif
34
35/*
36
37*/
38
39/*
40 ============================================================================
41 _badfio() -- set "bad fd" error on I/O
42 ============================================================================
43*/
44
45int16_t _badfio(io_arg arg, int8_t *buff, int16_t len)
46{
47 errno = EBADF; /* set bad fd code */
48 return(FAILURE); /* return with an error indication */
49}
50
51/*
52 ============================================================================
53 _badfc() -- set "bad fd" error on close
54 ============================================================================
55*/
56
57int16_t _badfc(io_arg arg)
58{
59 errno = EBADF; /* set bad fd code */
60 return(FAILURE); /* return with an error indication */
61}
62
63/*
64 ============================================================================
65 _nopo() -- null open with no error condition
66 ============================================================================
67*/
68
69int16_t _nopo(int8_t *name, int16_t flag, int16_t mode, struct channel *chp, struct devtabl *dp)
70{
71 return(SUCCESS); /* return with a non-error indication */
72}
73
74/*
75 ============================================================================
76 _nopc() -- null close with no error condition
77 ============================================================================
78*/
79
80int16_t _nopc(io_arg arg)
81{
82 return(SUCCESS); /* return with a non-error indication */
83}
84
85/*
86
87*/
88
89/*
90 ============================================================================
91 InitCH() -- Initialize chantab structure entry
92 ============================================================================
93*/
94
95void InitCH(struct channel *cp, int8_t rdi, int8_t wri, int8_t ioi, int8_t ski, chclo cfp, io_arg charg)
96{
97 cp->c_read = rdi;
98 cp->c_write = wri;
99 cp->c_ioctl = ioi;
100 cp->c_seek = ski;
101 cp->c_close = cfp;
102 cp->c_arg = charg;
103}
104
105/*
106 ============================================================================
107 Init_CB() -- Initialize Cbuff structure entry
108 ============================================================================
109*/
110
111void Init_CB(FILE *fp, int8_t unit, int8_t flags, int32_t *bufad, int16_t bufsize)
112{
113 fp->_bp = (int8_t *)0L;
114 fp->_bend = (int8_t *)0L;
115 fp->_buff = (int8_t *)bufad;
116 fp->_flags = flags;
117 fp->_unit = unit;
118 fp->_bytbuf = 0;
119 fp->_buflen = bufsize;
120};
121
122/*
123
124*/
125
126/*
127 ============================================================================
128 InitFS() -- Initialize file system
129 ============================================================================
130*/
131
132void InitFS(void)
133{
134 register int16_t i;
135
136 memset(_fcbtab, 0, sizeof _fcbtab); /* clear fcb table */
137 memsetw(Stdbuf, 0, sizeof Stdbuf / 2); /* clear buffers */
138
139 Init_CB(stdin, _BUSY, 0, (int8_t *)0L, BUFSIZ); /* stdin */
140 Init_CB(stdout, _BUSY, 1, (int8_t *)0L, 1); /* stdout */
141 Init_CB(stderr, _BUSY, 2, (int8_t *)0L, 1); /* stderr */
142
143 for (i = 3; i < NSTREAMS; i++)
144 Init_CB(&Cbuffs[i], 0, 0, (int8_t *)0L, 0);
145
146 Stdbuf[0][0] = 0L; /* initialize the buffer list */
147
148 for (i = 1; i < MAXDFILE; i++)
149 Stdbuf[i][0] = (int32_t)Stdbuf[i-1];
150
151 Stdbufs = Stdbuf[MAXDFILE-1];
152
153 InitCH(&chantab[0], 2, 0, 1, 0, _nopc, (io_arg)CON_DEV ); /* 0 - stdin */
154 InitCH(&chantab[1], 0, 2, 1, 0, _nopc, (io_arg)CON_DEV ); /* 1 - stdout */
155 InitCH(&chantab[2], 0, 2, 1, 0, _nopc, (io_arg)CON_DEV ); /* 2 - stderr */
156
157 for (i = 3; i < MAXCHAN; i++) /* 3..MAXCHAN-1 - not preassigned */
158 InitCH(&chantab[i], 0, 0, 0, 0, _badfc, (io_arg)0L );
159
160 _bpbin = FALSE; /* BPB isn't in memory */
161 _dirin = FALSE; /* directory isn't in memory */
162 _fatin = FALSE; /* FAT isn't in memory */
163 _fatmod = FALSE; /* FAT hasn't been changed */
164 _dirmod = FALSE; /* directory hasn't been changed */
165
166#if TBUFFER
167 _b_trak = -1; /* no track in the buffer */
168 _b_side = -1; /* ... */
169#endif
170}
171
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