source: buchla-68k/libcio/fsinit.c@ fa38804

Last change on this file since fa38804 was fa38804, checked in by Thomas Lopatic <thomas@…>, 7 years ago

Removed form-feed comments.
  • 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 _badfio() -- set "bad fd" error on I/O
38 ============================================================================
39*/
40
41int16_t _badfio(io_arg arg, int8_t *buff, int16_t len)
42{
43 errno = EBADF; /* set bad fd code */
44 return(FAILURE); /* return with an error indication */
45}
46
47/*
48 ============================================================================
49 _badfc() -- set "bad fd" error on close
50 ============================================================================
51*/
52
53int16_t _badfc(io_arg arg)
54{
55 errno = EBADF; /* set bad fd code */
56 return(FAILURE); /* return with an error indication */
57}
58
59/*
60 ============================================================================
61 _nopo() -- null open with no error condition
62 ============================================================================
63*/
64
65int16_t _nopo(int8_t *name, int16_t flag, int16_t mode, struct channel *chp, struct devtabl *dp)
66{
67 return(SUCCESS); /* return with a non-error indication */
68}
69
70/*
71 ============================================================================
72 _nopc() -- null close with no error condition
73 ============================================================================
74*/
75
76int16_t _nopc(io_arg arg)
77{
78 return(SUCCESS); /* return with a non-error indication */
79}
80
81/*
82 ============================================================================
83 InitCH() -- Initialize chantab structure entry
84 ============================================================================
85*/
86
87void InitCH(struct channel *cp, int8_t rdi, int8_t wri, int8_t ioi, int8_t ski, chclo cfp, io_arg charg)
88{
89 cp->c_read = rdi;
90 cp->c_write = wri;
91 cp->c_ioctl = ioi;
92 cp->c_seek = ski;
93 cp->c_close = cfp;
94 cp->c_arg = charg;
95}
96
97/*
98 ============================================================================
99 Init_CB() -- Initialize Cbuff structure entry
100 ============================================================================
101*/
102
103void Init_CB(FILE *fp, int8_t flags, int8_t unit, int32_t *bufad, int16_t bufsize)
104{
105 fp->_bp = (int8_t *)0L;
106 fp->_bend = (int8_t *)0L;
107 fp->_buff = (int8_t *)bufad;
108 fp->_flags = flags;
109 fp->_unit = unit;
110 fp->_bytbuf = 0;
111 fp->_buflen = bufsize;
112};
113
114/*
115 ============================================================================
116 InitFS() -- Initialize file system
117 ============================================================================
118*/
119
120void InitFS(void)
121{
122 register int16_t i;
123
124 memset(_fcbtab, 0, sizeof _fcbtab); /* clear fcb table */
125 memsetw(Stdbuf, 0, sizeof Stdbuf / 2); /* clear buffers */
126
127 Init_CB(stdin, _BUSY, 0, (int8_t *)0L, BUFSIZ); /* stdin */
128 Init_CB(stdout, _BUSY, 1, (int8_t *)0L, 1); /* stdout */
129 Init_CB(stderr, _BUSY, 2, (int8_t *)0L, 1); /* stderr */
130
131 for (i = 3; i < NSTREAMS; i++)
132 Init_CB(&Cbuffs[i], 0, 0, (int8_t *)0L, 0);
133
134 Stdbuf[0][0] = 0L; /* initialize the buffer list */
135
136 for (i = 1; i < MAXDFILE; i++)
137 Stdbuf[i][0] = (int32_t)Stdbuf[i-1];
138
139 Stdbufs = Stdbuf[MAXDFILE-1];
140
141 InitCH(&chantab[0], 2, 0, 1, 0, _nopc, (io_arg)CON_DEV ); /* 0 - stdin */
142 InitCH(&chantab[1], 0, 2, 1, 0, _nopc, (io_arg)CON_DEV ); /* 1 - stdout */
143 InitCH(&chantab[2], 0, 2, 1, 0, _nopc, (io_arg)CON_DEV ); /* 2 - stderr */
144
145 for (i = 3; i < MAXCHAN; i++) /* 3..MAXCHAN-1 - not preassigned */
146 InitCH(&chantab[i], 0, 0, 0, 0, _badfc, (io_arg)0L );
147
148 _bpbin = FALSE; /* BPB isn't in memory */
149 _dirin = FALSE; /* directory isn't in memory */
150 _fatin = FALSE; /* FAT isn't in memory */
151 _fatmod = FALSE; /* FAT hasn't been changed */
152 _dirmod = FALSE; /* directory hasn't been changed */
153
154#if TBUFFER
155 _b_trak = -1; /* no track in the buffer */
156 _b_side = -1; /* ... */
157#endif
158}
159
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