| 1 | #include "config.h"
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| 2 | #include "f2c.h"
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| 3 | #include "fio.h"
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| 4 |
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| 5 | int
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| 6 | c_due (cilist * a)
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| 7 | {
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| 8 | if (f__init != 1)
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| 9 | f_init ();
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| 10 | f__init = 3;
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| 11 | if (a->ciunit >= MXUNIT || a->ciunit < 0)
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| 12 | err (a->cierr, 101, "startio");
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| 13 | f__sequential = f__formatted = f__recpos = 0;
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| 14 | f__external = 1;
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| 15 | f__curunit = &f__units[a->ciunit];
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| 16 | if (a->ciunit >= MXUNIT || a->ciunit < 0)
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| 17 | err (a->cierr, 101, "startio");
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| 18 | f__elist = a;
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| 19 | if (f__curunit->ufd == NULL && fk_open (DIR, UNF, a->ciunit))
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| 20 | err (a->cierr, 104, "due");
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| 21 | f__cf = f__curunit->ufd;
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| 22 | if (f__curunit->ufmt)
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| 23 | err (a->cierr, 102, "cdue");
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| 24 | if (!f__curunit->useek)
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| 25 | err (a->cierr, 104, "cdue");
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| 26 | if (f__curunit->ufd == NULL)
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| 27 | err (a->cierr, 114, "cdue");
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| 28 | if (a->cirec <= 0)
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| 29 | err (a->cierr, 130, "due");
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| 30 | FSEEK (f__cf, (off_t) (a->cirec - 1) * f__curunit->url, SEEK_SET);
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| 31 | f__curunit->uend = 0;
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| 32 | return (0);
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| 33 | }
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| 34 |
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| 35 | integer
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| 36 | s_rdue (cilist * a)
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| 37 | {
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| 38 | int n;
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| 39 | f__reading = 1;
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| 40 | if ((n = c_due (a)))
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| 41 | return (n);
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| 42 | if (f__curunit->uwrt && f__nowreading (f__curunit))
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| 43 | err (a->cierr, errno, "read start");
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| 44 | return (0);
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| 45 | }
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| 46 |
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| 47 | integer
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| 48 | s_wdue (cilist * a)
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| 49 | {
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| 50 | int n;
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| 51 | f__reading = 0;
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| 52 | if ((n = c_due (a)))
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| 53 | return (n);
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| 54 | if (f__curunit->uwrt != 1 && f__nowwriting (f__curunit))
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| 55 | err (a->cierr, errno, "write start");
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| 56 | return (0);
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| 57 | }
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| 58 |
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| 59 | integer
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| 60 | e_rdue (void)
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| 61 | {
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| 62 | f__init = 1;
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| 63 | if (f__curunit->url == 1 || f__recpos == f__curunit->url)
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| 64 | return (0);
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| 65 | FSEEK (f__cf, (off_t) (f__curunit->url - f__recpos), SEEK_CUR);
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| 66 | if (FTELL (f__cf) % f__curunit->url)
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| 67 | err (f__elist->cierr, 200, "syserr");
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| 68 | return (0);
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| 69 | }
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| 70 |
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| 71 | integer
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| 72 | e_wdue (void)
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| 73 | {
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| 74 | f__init = 1;
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| 75 | #ifdef ALWAYS_FLUSH
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| 76 | if (fflush (f__cf))
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| 77 | err (f__elist->cierr, errno, "write end");
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| 78 | #endif
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| 79 | return (e_rdue ());
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| 80 | }
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