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84 lines
1.8 KiB
C
84 lines
1.8 KiB
C
#include "f2c.h"
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#include "fio.h"
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extern uiolen f__reclen;
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long f__recloc;
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#ifdef KR_headers
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c_sue(a) cilist *a;
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#else
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c_sue(cilist *a)
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#endif
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{
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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__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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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) err(a->cierr,103,"sue")
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if(!f__curunit->useek) err(a->cierr,103,"sue")
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return(0);
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}
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#ifdef KR_headers
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integer s_rsue(a) cilist *a;
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#else
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integer s_rsue(cilist *a)
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#endif
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{
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int n;
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if(!f__init) f_init();
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f__reading=1;
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if(n=c_sue(a)) 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)
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!= 1)
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{ if(feof(f__cf))
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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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#ifdef KR_headers
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integer s_wsue(a) cilist *a;
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#else
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integer s_wsue(cilist *a)
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#endif
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{
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int n;
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if(!f__init) f_init();
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if(n=c_sue(a)) 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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(void) fseek(f__cf,(long)sizeof(uiolen),SEEK_CUR);
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return(0);
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}
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integer e_wsue(Void)
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{ long loc;
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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 e_rsue(Void)
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{
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(void) fseek(f__cf,(long)(f__reclen-f__recpos+sizeof(uiolen)),SEEK_CUR);
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return(0);
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}
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