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Annotation of 40BSD/lib/libI77/due.c, revision 1.1.1.1

1.1       root        1: #include "fio.h"
                      2: s_rdue(a) cilist *a;
                      3: {
                      4:        int n;
                      5:        if(n=c_due(a)) return(n);
                      6:        reading=1;
                      7:        if(curunit->uwrt) (void) nowreading(curunit);
                      8:        return(0);
                      9: }
                     10: s_wdue(a) cilist *a;
                     11: {
                     12:        int n;
                     13:        if(n=c_due(a)) return(n);
                     14:        reading=0;
                     15:        if(!curunit->uwrt) (void) nowwriting(curunit);
                     16:        return(0);
                     17: }
                     18: c_due(a) 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(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:        (void) 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:        (void) 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: }

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