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93 lines
1.9 KiB
C
93 lines
1.9 KiB
C
#include "config.h"
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#include "f2c.h"
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#include "fio.h"
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extern uiolen f__reclen;
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off_t f__recloc;
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c_sue (cilist * a)
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{
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f__external = f__sequential = 1;
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f__formatted = 0;
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f__curunit = &f__units[a->ciunit];
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if (a->ciunit >= MXUNIT || a->ciunit < 0)
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err (a->cierr, 101, "startio");
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f__elist = a;
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if (f__curunit->ufd == NULL && fk_open (SEQ, UNF, a->ciunit))
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err (a->cierr, 114, "sue");
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f__cf = f__curunit->ufd;
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if (f__curunit->ufmt)
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err (a->cierr, 103, "sue");
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if (!f__curunit->useek)
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err (a->cierr, 103, "sue");
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return (0);
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}
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integer
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s_rsue (cilist * a)
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{
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int n;
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if (f__init != 1)
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f_init ();
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f__init = 3;
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f__reading = 1;
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if (n = c_sue (a))
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return (n);
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f__recpos = 0;
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if (f__curunit->uwrt && f__nowreading (f__curunit))
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err (a->cierr, errno, "read start");
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if (fread ((char *) &f__reclen, sizeof (uiolen), 1, f__cf) != 1)
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{
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if (feof (f__cf))
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{
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f__curunit->uend = 1;
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err (a->ciend, EOF, "start");
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}
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clearerr (f__cf);
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err (a->cierr, errno, "start");
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}
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return (0);
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}
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integer
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s_wsue (cilist * a)
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{
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int n;
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if (f__init != 1)
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f_init ();
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f__init = 3;
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if (n = c_sue (a))
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return (n);
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f__reading = 0;
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f__reclen = 0;
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if (f__curunit->uwrt != 1 && f__nowwriting (f__curunit))
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err (a->cierr, errno, "write start");
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f__recloc = FTELL (f__cf);
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FSEEK (f__cf, (off_t) sizeof (uiolen), SEEK_CUR);
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return (0);
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}
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integer
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e_wsue (void)
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{
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off_t loc;
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f__init = 1;
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fwrite ((char *) &f__reclen, sizeof (uiolen), 1, f__cf);
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#ifdef ALWAYS_FLUSH
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if (fflush (f__cf))
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err (f__elist->cierr, errno, "write end");
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#endif
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loc = FTELL (f__cf);
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FSEEK (f__cf, f__recloc, SEEK_SET);
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fwrite ((char *) &f__reclen, sizeof (uiolen), 1, f__cf);
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FSEEK (f__cf, loc, SEEK_SET);
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return (0);
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}
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integer
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e_rsue (void)
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{
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f__init = 1;
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FSEEK (f__cf, (off_t) (f__reclen - f__recpos + sizeof (uiolen)), SEEK_CUR);
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return (0);
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}
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