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