projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 8662e665 PW |
1 | #include "fio.h" |
| 2 | s_rdue(a) cilist *a; | |
| 3 | { | |
| 4 | int n; | |
| 5 | if(n=c_due(a,READ)) return(n); | |
| 6 | reading=1; | |
| 7 | if(curunit->uwrt) nowreading(curunit); | |
| 8 | return(0); | |
| 9 | } | |
| 10 | s_wdue(a) cilist *a; | |
| 11 | { | |
| 12 | int n; | |
| 13 | if(n=c_due(a,WRITE)) return(n); | |
| 14 | reading=0; | |
| 15 | if(!curunit->uwrt) nowwriting(curunit); | |
| 16 | return(0); | |
| 17 | } | |
| 18 | c_due(a,flag) cilist *a; | |
| 19 | { | |
| 20 | if(!init) f_init(); | |
| 21 | if(a->ciunit>=MXUNIT || a->ciunit<0) | |
| 22 | err(a->cierr,101,"startio"); | |
| 23 | recpos=sequential=formatted=0; | |
| 24 | external=1; | |
| 25 | curunit = &units[a->ciunit]; | |
| 26 | elist=a; | |
| 27 | if(curunit->ufd==NULL && fk_open(flag,DIR,UNF,a->ciunit) ) err(a->cierr,104,"due"); | |
| 28 | cf=curunit->ufd; | |
| 29 | if(curunit->ufmt) err(a->cierr,102,"cdue") | |
| 30 | if(!curunit->useek) err(a->cierr,104,"cdue") | |
| 31 | if(curunit->ufd==NULL) err(a->cierr,114,"cdue") | |
| 32 | fseek(cf,(long)(a->cirec-1)*curunit->url,0); | |
| 33 | curunit->uend = 0; | |
| 34 | return(0); | |
| 35 | } | |
| 36 | e_rdue() | |
| 37 | { | |
| 38 | if(curunit->url==1 || recpos==curunit->url) | |
| 39 | return(0); | |
| 40 | fseek(cf,(long)(curunit->url-recpos),1); | |
| 41 | if(ftell(cf)%curunit->url) | |
| 42 | err(elist->cierr,200,"syserr"); | |
| 43 | return(0); | |
| 44 | } | |
| 45 | e_wdue() | |
| 46 | { | |
| 47 | return(e_rdue()); | |
| 48 | } |