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74 lines
1.6 KiB
C
74 lines
1.6 KiB
C
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#include "f2c.h"
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#include "fio.h"
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#ifdef KR_headers
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c_due(a) cilist *a;
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#else
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c_due(cilist *a)
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#endif
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{
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if(f__init != 1) f_init();
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f__init = 3;
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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__sequential=f__formatted=f__recpos=0;
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f__external=1;
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f__curunit = &f__units[a->ciunit];
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f__elist=a;
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if(f__curunit->ufd==NULL && fk_open(DIR,UNF,a->ciunit) ) err(a->cierr,104,"due");
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f__cf=f__curunit->ufd;
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if(f__curunit->ufmt) err(a->cierr,102,"cdue");
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if(!f__curunit->useek) err(a->cierr,104,"cdue");
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if(f__curunit->ufd==NULL) err(a->cierr,114,"cdue");
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if(a->cirec <= 0)
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err(a->cierr,130,"due");
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(void) fseek(f__cf,(long)(a->cirec-1)*f__curunit->url,SEEK_SET);
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f__curunit->uend = 0;
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return(0);
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}
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#ifdef KR_headers
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integer s_rdue(a) cilist *a;
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#else
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integer s_rdue(cilist *a)
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#endif
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{
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int n;
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f__reading=1;
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if(n=c_due(a)) return(n);
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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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return(0);
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}
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#ifdef KR_headers
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integer s_wdue(a) cilist *a;
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#else
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integer s_wdue(cilist *a)
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#endif
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{
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int n;
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f__reading=0;
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if(n=c_due(a)) return(n);
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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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return(0);
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}
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integer e_rdue(Void)
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{
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f__init = 1;
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if(f__curunit->url==1 || f__recpos==f__curunit->url)
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return(0);
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(void) fseek(f__cf,(long)(f__curunit->url-f__recpos),SEEK_CUR);
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if(ftell(f__cf)%f__curunit->url)
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err(f__elist->cierr,200,"syserr");
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return(0);
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}
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integer e_wdue(Void)
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{
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f__init = 1;
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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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return(e_rdue());
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}
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