source: buchla-68k/libcio/fsinit.c@ 526a993

Last change on this file since 526a993 was b28a12e, checked in by Thomas Lopatic <thomas@…>, 7 years ago

Zero redundant declarations.
  • Property mode set to 100644
File size: 3.9 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 _badfd() -- set "bad fd" error
42 ============================================================================
43*/
44
45int16_t _badfd(void)
46{
47 errno = EBADF; /* set bad fd code */
48 return(FAILURE); /* return with an error indication */
49}
50
51/*
52 ============================================================================
53 _noper() -- null return with no error condition
54 ============================================================================
55*/
56
57int16_t _noper(void)
58{
59 return(SUCCESS); /* return with a non-error indication */
60}
61
62/*
63
64*/
65
66/*
67 ============================================================================
68 InitCH() -- Initialize chantab structure entry
69 ============================================================================
70*/
71
72void InitCH(struct channel *cp, int8_t rdi, int8_t wri, int8_t ioi, int8_t ski, int16_t (*cfp)(), io_arg charg)
73{
74 cp->c_read = rdi;
75 cp->c_write = wri;
76 cp->c_ioctl = ioi;
77 cp->c_seek = ski;
78 cp->c_close = cfp;
79 cp->c_arg = charg;
80}
81
82/*
83 ============================================================================
84 Init_CB() -- Initialize Cbuff structure entry
85 ============================================================================
86*/
87
88void Init_CB(FILE *fp, int8_t unit, int8_t flags, int32_t *bufad, int16_t bufsize)
89{
90 fp->_bp = (int8_t *)0L;
91 fp->_bend = (int8_t *)0L;
92 fp->_buff = (int8_t *)bufad;
93 fp->_flags = flags;
94 fp->_unit = unit;
95 fp->_bytbuf = 0;
96 fp->_buflen = bufsize;
97};
98
99/*
100
101*/
102
103/*
104 ============================================================================
105 InitFS() -- Initialize file system
106 ============================================================================
107*/
108
109void InitFS(void)
110{
111 register int16_t i;
112
113 memset(_fcbtab, 0, sizeof _fcbtab); /* clear fcb table */
114 memsetw(Stdbuf, 0, sizeof Stdbuf / 2); /* clear buffers */
115
116 Init_CB(stdin, _BUSY, 0, (int8_t *)0L, BUFSIZ); /* stdin */
117 Init_CB(stdout, _BUSY, 1, (int8_t *)0L, 1); /* stdout */
118 Init_CB(stderr, _BUSY, 2, (int8_t *)0L, 1); /* stderr */
119
120 for (i = 3; i < NSTREAMS; i++)
121 Init_CB(&Cbuffs[i], 0, 0, (int8_t *)0L, 0);
122
123 Stdbuf[0][0] = 0L; /* initialize the buffer list */
124
125 for (i = 1; i < MAXDFILE; i++)
126 Stdbuf[i][0] = (int32_t)Stdbuf[i-1];
127
128 Stdbufs = Stdbuf[MAXDFILE-1];
129
130 InitCH(&chantab[0], 2, 0, 1, 0, _noper, (io_arg)CON_DEV ); /* 0 - stdin */
131 InitCH(&chantab[1], 0, 2, 1, 0, _noper, (io_arg)CON_DEV ); /* 1 - stdout */
132 InitCH(&chantab[2], 0, 2, 1, 0, _noper, (io_arg)CON_DEV ); /* 2 - stderr */
133
134 for (i = 3; i < MAXCHAN; i++) /* 3..MAXCHAN-1 - not preassigned */
135 InitCH(&chantab[i], 0, 0, 0, 0, _badfd, (io_arg)0L );
136
137 _bpbin = FALSE; /* BPB isn't in memory */
138 _dirin = FALSE; /* directory isn't in memory */
139 _fatin = FALSE; /* FAT isn't in memory */
140 _fatmod = FALSE; /* FAT hasn't been changed */
141 _dirmod = FALSE; /* directory hasn't been changed */
142
143#if TBUFFER
144 _b_trak = -1; /* no track in the buffer */
145 _b_side = -1; /* ... */
146#endif
147}
148
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