| 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 | extern uiolen f__reclen;
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| 5 | off_t f__recloc;
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| 6 |
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| 7 | int
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| 8 | c_sue (cilist * a)
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| 9 | {
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| 10 | f__external = f__sequential = 1;
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| 11 | f__formatted = 0;
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| 12 | f__curunit = &f__units[a->ciunit];
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| 13 | if (a->ciunit >= MXUNIT || a->ciunit < 0)
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| 14 | err (a->cierr, 101, "startio");
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| 15 | f__elist = a;
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| 16 | if (f__curunit->ufd == NULL && fk_open (SEQ, UNF, a->ciunit))
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| 17 | err (a->cierr, 114, "sue");
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| 18 | f__cf = f__curunit->ufd;
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| 19 | if (f__curunit->ufmt)
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| 20 | err (a->cierr, 103, "sue");
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| 21 | if (!f__curunit->useek)
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| 22 | err (a->cierr, 103, "sue");
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| 23 | return (0);
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| 24 | }
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| 25 |
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| 26 | integer
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| 27 | s_rsue (cilist * a)
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| 28 | {
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| 29 | int n;
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| 30 | if (f__init != 1)
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| 31 | f_init ();
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| 32 | f__init = 3;
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| 33 | f__reading = 1;
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| 34 | if ((n = c_sue (a)))
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| 35 | return (n);
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| 36 | f__recpos = 0;
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| 37 | if (f__curunit->uwrt && f__nowreading (f__curunit))
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| 38 | err (a->cierr, errno, "read start");
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| 39 | if (fread ((char *) &f__reclen, sizeof (uiolen), 1, f__cf) != 1)
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| 40 | {
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| 41 | if (feof (f__cf))
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| 42 | {
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| 43 | f__curunit->uend = 1;
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| 44 | err (a->ciend, EOF, "start");
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| 45 | }
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| 46 | clearerr (f__cf);
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| 47 | err (a->cierr, errno, "start");
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| 48 | }
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| 49 | return (0);
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| 50 | }
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| 51 |
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| 52 | integer
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| 53 | s_wsue (cilist * a)
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| 54 | {
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| 55 | int n;
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| 56 | if (f__init != 1)
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| 57 | f_init ();
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| 58 | f__init = 3;
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| 59 | if ((n = c_sue (a)))
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| 60 | return (n);
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| 61 | f__reading = 0;
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| 62 | f__reclen = 0;
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| 63 | if (f__curunit->uwrt != 1 && f__nowwriting (f__curunit))
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| 64 | err (a->cierr, errno, "write start");
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| 65 | f__recloc = FTELL (f__cf);
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| 66 | FSEEK (f__cf, (off_t) sizeof (uiolen), SEEK_CUR);
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| 67 | return (0);
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| 68 | }
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| 69 |
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| 70 | integer
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| 71 | e_wsue (void)
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| 72 | {
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| 73 | off_t loc;
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| 74 | f__init = 1;
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| 75 | fwrite ((char *) &f__reclen, sizeof (uiolen), 1, f__cf);
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| 76 | #ifdef ALWAYS_FLUSH
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| 77 | if (fflush (f__cf))
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| 78 | err (f__elist->cierr, errno, "write end");
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| 79 | #endif
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| 80 | loc = FTELL (f__cf);
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| 81 | FSEEK (f__cf, f__recloc, SEEK_SET);
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| 82 | fwrite ((char *) &f__reclen, sizeof (uiolen), 1, f__cf);
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| 83 | FSEEK (f__cf, loc, SEEK_SET);
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| 84 | return (0);
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| 85 | }
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| 86 |
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| 87 | integer
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| 88 | e_rsue (void)
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| 89 | {
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| 90 | f__init = 1;
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| 91 | FSEEK (f__cf, (off_t) (f__reclen - f__recpos + sizeof (uiolen)), SEEK_CUR);
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| 92 | return (0);
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| 93 | }
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