[f40a309] | 1 | /*
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| 2 | =============================================================================
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| 3 | fsize.c -- file size and disk capacity functions
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| 4 | Version 1 -- 1987-10-29 -- D.N. Lynx Crowe
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| 5 | =============================================================================
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| 6 | */
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| 7 |
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[6262b5c] | 8 | #include "all.h"
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[f40a309] | 9 |
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[7258c6a] | 10 | extern uint16_t _gtcl12(int8_t *fat, uint16_t cl);
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| 11 | extern int16_t _opnvol(void);
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| 12 | extern int16_t _filecl(struct fcb *fp);
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[f40a309] | 13 |
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[7258c6a] | 14 | extern uint16_t _thefat[];
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[f40a309] | 15 |
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| 16 | extern struct bpb *_thebpb;
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| 17 |
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| 18 | /*
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| 19 | =============================================================================
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| 20 | fsize() -- return the current size of an open stream file
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| 21 |
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| 22 | how = 0: in bytes, 1: in allocated clusters
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| 23 | =============================================================================
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| 24 | */
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| 25 |
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[7258c6a] | 26 | int32_t fsize(FILE *fp, int16_t how)
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[f40a309] | 27 | {
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| 28 | register struct channel *chp;
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| 29 | register struct fcb *fcp;
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| 30 |
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| 31 | if (fp EQ (FILE *)0L)
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| 32 | return(-1L);
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| 33 |
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| 34 | if (fp->_flags & _BUSY) {
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| 35 |
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| 36 | chp = &chantab[fp->_unit];
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| 37 |
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| 38 | if (chp->c_close NE _filecl)
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| 39 | return(-1L);
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| 40 |
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| 41 | fcp = chp->c_arg;
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| 42 |
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| 43 | if (fcp->modefl & FC_OPN) {
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| 44 |
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| 45 | if (how)
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| 46 | return(fcp->asects);
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| 47 | else
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| 48 | return(fcp->curlen);
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| 49 |
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| 50 | } else
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| 51 | return(-1L);
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| 52 |
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| 53 | } else
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| 54 | return(-1L);
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| 55 | }
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| 56 |
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| 57 | /* |
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| 58 |
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| 59 | */
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| 60 |
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| 61 | /*
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| 62 | =============================================================================
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| 63 | dspace() -- return disk capacity or usage
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| 64 |
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| 65 | which = 0: capcity, 1: usage
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| 66 | =============================================================================
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| 67 | */
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[7258c6a] | 68 |
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[f40a309] | 69 | int16_t dspace(int16_t which)
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[7258c6a] | 70 | {
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[f40a309] | 71 | register int16_t maxcl, clcount, nc;
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| 72 |
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| 73 | if (_opnvol())
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| 74 | return(-1L);
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| 75 |
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| 76 | maxcl = _thebpb->numcl;
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| 77 |
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| 78 | if (which) {
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| 79 |
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| 80 | clcount = 0;
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| 81 |
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| 82 | for (nc = 2; nc < maxcl; nc++)
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| 83 | if (0 EQ _gtcl12(_thefat, nc))
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| 84 | ++clcount;
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| 85 |
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| 86 | return(clcount);
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| 87 |
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| 88 | } else {
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| 89 |
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| 90 | return(maxcl);
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| 91 | }
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[6262b5c] | 92 | }
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| 93 |
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