4 extern uiolen f__reclen;
13 f__external=f__sequential=1;
15 f__curunit = &f__units[a->ciunit];
16 if(a->ciunit >= MXUNIT || a->ciunit < 0)
17 err(a->cierr,101,"startio");
19 if(f__curunit->ufd==NULL && fk_open(SEQ,UNF,a->ciunit))
20 err(a->cierr,114,"sue");
21 f__cf=f__curunit->ufd;
22 if(f__curunit->ufmt) err(a->cierr,103,"sue");
23 if(!f__curunit->useek) err(a->cierr,103,"sue");
27 integer s_rsue(a) cilist *a;
29 integer s_rsue(cilist *a)
33 if(f__init != 1) f_init();
36 if(n=c_sue(a)) return(n);
38 if(f__curunit->uwrt && f__nowreading(f__curunit))
39 err(a->cierr, errno, "read start");
40 if(fread((char *)&f__reclen,sizeof(uiolen),1,f__cf)
43 { f__curunit->uend = 1;
44 err(a->ciend, EOF, "start");
47 err(a->cierr, errno, "start");
52 integer s_wsue(a) cilist *a;
54 integer s_wsue(cilist *a)
58 if(f__init != 1) f_init();
60 if(n=c_sue(a)) return(n);
63 if(f__curunit->uwrt != 1 && f__nowwriting(f__curunit))
64 err(a->cierr, errno, "write start");
65 f__recloc=FTELL(f__cf);
66 FSEEK(f__cf,(off_t)sizeof(uiolen),SEEK_CUR);
72 fwrite((char *)&f__reclen,sizeof(uiolen),1,f__cf);
75 err(f__elist->cierr, errno, "write end");
78 FSEEK(f__cf,f__recloc,SEEK_SET);
79 fwrite((char *)&f__reclen,sizeof(uiolen),1,f__cf);
80 FSEEK(f__cf,loc,SEEK_SET);
86 FSEEK(f__cf,(off_t)(f__reclen-f__recpos+sizeof(uiolen)),SEEK_CUR);