[f40a309] | 1 | /*
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| 2 | =============================================================================
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| 3 | blkwr.c -- write a block of 0..32767 sectors
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| 4 | Version 14 -- 1987-12-15 -- D.N. Lynx Crowe
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| 5 |
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| 6 | int
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| 7 | blkwr(fcp, buf, ns)
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| 8 | struct fcb *fcp;
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| 9 | char *buf;
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| 10 | int ns;
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| 11 |
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| 12 | Writes 'ns' sectors from file 'fcp' into 'buf'.
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| 13 | Returns the number of unwritten sectors,
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| 14 | or 0 if all were written.
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| 15 | =============================================================================
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| 16 | */
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| 17 |
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| 18 | #define DEBUGIT 0
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| 19 |
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[b28a12e] | 20 | #include "ram.h"
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[f40a309] | 21 |
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| 22 | #if TBUFFER
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| 23 |
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| 24 | /*
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| 25 | =============================================================================
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| 26 | _secwr(buf, rec) -- write a logical sector into the track buffer
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| 27 | =============================================================================
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| 28 | */
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| 29 |
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[7258c6a] | 30 | int32_t _secwr(int8_t *buf, int16_t rec)
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[f40a309] | 31 | {
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[7258c6a] | 32 | register int16_t track, side, sector;
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[f40a309] | 33 |
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| 34 | if (_thebpb->dspt NE 9) /* make sure we can do this */
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| 35 | return(ERR07);
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| 36 |
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| 37 | if (_thebpb->recsiz NE 512)
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| 38 | return(ERR07);
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| 39 |
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| 40 | track = rec / _thebpb->dspc; /* desired track */
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| 41 | sector = rec - (track * _thebpb->dspc); /* logical sector */
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| 42 |
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| 43 | if (sector GE _thebpb->dspt) { /* adjust sector and side */
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| 44 |
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| 45 | sector -= _thebpb->dspt;
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| 46 | side = 1;
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| 47 |
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| 48 | } else {
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| 49 |
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| 50 | side = 0;
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| 51 | }
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| 52 |
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| 53 | #if DEBUGIT
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| 54 | if (fsdebug) {
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| 55 |
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| 56 | printf("_secwr($%08.8LX, %d): track=%d, side=%d, sector=%d\n",
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| 57 | buf, rec, track, side, sector);
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| 58 | printf("_secwr(): _b_trak=%d, _b_side=%d, _b_sect=%d, _b_tsec=%d\n",
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| 59 | _b_trak, _b_side, _b_sect, _b_tsec);
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| 60 | }
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| 61 | #endif
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| 62 |
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| 63 | if ((track NE _b_trak) OR (side NE _b_side)) /* track in buffer ? */
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| 64 | return(0L);
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| 65 |
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[7258c6a] | 66 | memcpy((int8_t *)_b_tbuf[sector], buf, 512); /* update the buffer */
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[f40a309] | 67 |
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| 68 | #if DEBUGIT
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| 69 | if (fsdebug)
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| 70 | printf("_secwr(): updated track buffer\n");
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| 71 | #endif
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| 72 |
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| 73 | return(0L);
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| 74 | }
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| 75 |
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| 76 | #endif
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| 77 |
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| 78 | /*
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| 79 | =============================================================================
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| 80 | blkwr(fcp, buf, ns) -- write 'ns' sectors from file 'fcp' into 'buf'.
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| 81 | Returns the number of unwritten sectors, or 0 if all were written.
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| 82 | =============================================================================
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| 83 | */
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| 84 |
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[7258c6a] | 85 | int16_t blkwr(struct fcb *fcp, int8_t *buf, int16_t ns)
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[f40a309] | 86 | {
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[7258c6a] | 87 | int32_t rc;
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| 88 | int16_t clustr;
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[f40a309] | 89 |
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| 90 | while (ns > 0) { /* write a sector at a time */
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| 91 |
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| 92 | if (fcp->asects) {
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| 93 |
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| 94 | if (fcp->curlsn LT fcp->asects) {
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| 95 |
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| 96 | #if DEBUGIT
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| 97 | if (fsdebug)
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| 98 | printf("blkwr(): [1] ns=%d, curlsn=%ld, curdsn=%ld, curcls=%u, buf=$%08lX\n",
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| 99 | ns, fcp->curlsn, fcp->curdsn, fcp->curcls, buf);
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| 100 | #endif
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| 101 |
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[8973acd] | 102 | if ((rc = BIOS(B_RDWR, 1, buf, 1, (int16_t)fcp->curdsn, 0))) {
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[f40a309] | 103 |
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| 104 | #if DEBUGIT
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| 105 | if (fsdebug)
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| 106 | printf("blkwr(): B_RDWR failed, rc=%ld\n", rc);
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| 107 | #endif
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| 108 |
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| 109 | _berrno = rc; /* log the error */
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| 110 | errno = EIO;
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| 111 | return(ns); /* return unwritten sector count */
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| 112 | }
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| 113 |
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| 114 | #if TBUFFER
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[7258c6a] | 115 | _secwr(buf, (int16_t)fcp->curdsn);
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[f40a309] | 116 | #endif
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| 117 |
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| 118 | rc = _nsic(fcp, _thebpb, _thefat);
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| 119 |
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| 120 | #if DEBUGIT
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| 121 | if (fsdebug)
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| 122 | printf("blkwr(): _nsic() rc=%ld\n", rc);
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| 123 | #endif
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| 124 |
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| 125 | if (--ns EQ 0) /* done if no more to do */
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| 126 | return(0);
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| 127 |
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| 128 | if (rc < 0) { /* bad cluster ? */
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| 129 |
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| 130 | errno = EIO; /* set error number */
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| 131 | return(ns); /* return unwritten sector count */
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| 132 | }
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| 133 |
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| 134 | buf += _thebpb->recsiz;
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[fa38804] | 135 |
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[f40a309] | 136 | } else if (fcp->curlsn EQ fcp->asects) {
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| 137 |
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| 138 | if (_alcnew(fcp)) { /* allocate a cluster */
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| 139 |
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| 140 | errno = EIO; /* set error number */
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| 141 | return(ns); /* return unwritten sector count */
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| 142 | }
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| 143 |
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| 144 | fcp->modefl &= ~FC_EOF; /* clear EOF flag */
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| 145 |
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| 146 | #if DEBUGIT
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| 147 | if (fsdebug)
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| 148 | printf("blkwr(): [2] ns=%d, curlsn=%ld, curdsn=%ld, curcls=%u, buf=$%08lX\n",
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| 149 | ns, fcp->curlsn, fcp->curdsn, fcp->curcls, buf);
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| 150 | #endif
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| 151 |
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[8973acd] | 152 | if ((rc = BIOS(B_RDWR, 1, buf, 1, (int16_t)fcp->curdsn, 0))) {
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[f40a309] | 153 |
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| 154 | #if DEBUGIT
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| 155 | if (fsdebug)
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| 156 | printf("blkwr(): B_RDWR failed, rc=%ld\n", rc);
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| 157 | #endif
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| 158 |
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| 159 | _berrno = rc; /* log the error */
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| 160 | errno = EIO;
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| 161 | return(ns); /* return unwritten sector count */
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| 162 | }
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| 163 |
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| 164 | #if TBUFFER
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[7258c6a] | 165 | _secwr(buf, (int16_t)fcp->curdsn);
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[f40a309] | 166 | #endif
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| 167 |
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| 168 | ++fcp->curlsn;
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| 169 | ++fcp->clsec;
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| 170 | ++fcp->curdsn;
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| 171 |
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| 172 | if (--ns EQ 0)
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| 173 | return(0);
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| 174 |
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| 175 | buf += _thebpb->recsiz; /* advance buffer pointer */
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| 176 | }
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[fa38804] | 177 |
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[f40a309] | 178 | } else {
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| 179 |
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| 180 | if (0 EQ (clustr = _newcls())) {
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| 181 |
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| 182 | errno = EIO;
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| 183 | return(ns);
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| 184 | }
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| 185 |
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[8973acd] | 186 | fcp->de.bclust = micon16((uint16_t)clustr);
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[f40a309] | 187 | _ptcl12(_thefat, clustr, 0x0FF8);
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| 188 | _fatmod = TRUE;
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| 189 | fcp->curdsn = _cl2lsn(_thebpb, clustr);
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| 190 | fcp->curcls = clustr;
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| 191 | fcp->clsec = 0;
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| 192 | fcp->asects = _thebpb->clsiz;
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| 193 | fcp->modefl &= ~FC_EOF;
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| 194 |
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| 195 | fcp->modefl &= ~FC_EOF; /* clear EOF flag */
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| 196 |
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| 197 | #if DEBUGIT
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| 198 | if (fsdebug)
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| 199 | printf("blkwr(): [3] ns=%d, curlsn=%ld, curdsn=%ld, curcls=%u, buf=$%08lX\n",
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| 200 | ns, fcp->curlsn, fcp->curdsn, fcp->curcls, buf);
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| 201 | #endif
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| 202 |
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[8973acd] | 203 | if ((rc = BIOS(B_RDWR, 1, buf, 1, (int16_t)fcp->curdsn, 0))) {
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[f40a309] | 204 |
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| 205 | #if DEBUGIT
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| 206 | if (fsdebug)
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| 207 | printf("blkwr(): B_RDWR failed, rc=%ld\n", rc);
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| 208 | #endif
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| 209 |
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| 210 | _berrno = rc; /* log the error */
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| 211 | errno = EIO;
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| 212 | return(ns); /* return unwritten sector count */
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| 213 | }
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| 214 |
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| 215 | #if TBUFFER
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[7258c6a] | 216 | _secwr(buf, (int16_t)fcp->curdsn);
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[f40a309] | 217 | #endif
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| 218 |
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| 219 | ++fcp->curlsn;
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| 220 | ++fcp->clsec;
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| 221 | ++fcp->curdsn;
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| 222 |
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| 223 | if (--ns EQ 0)
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| 224 | return(0);
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| 225 |
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| 226 | buf += _thebpb->recsiz; /* advance buffer pointer */
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| 227 | }
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| 228 | }
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| 229 |
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| 230 | return(ns); /* return (will be zero or negative) */
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| 231 | }
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[6262b5c] | 232 |
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