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Annotation of researchv10dc/libI77/old/due.c, revision 1.1.1.1

1.1       root        1: /*     @(#)due.c       1.2     */
                      2: /*     3.0 SID #       1.2     */
                      3: #include "fio.h"
                      4: s_rdue(a) cilist *a;
                      5: {
                      6:        int n;
                      7:        if(n=c_due(a)) return(n);
                      8:        reading=1;
                      9:        if(curunit->uwrt) (void) nowreading(curunit);
                     10:        return(0);
                     11: }
                     12: s_wdue(a) cilist *a;
                     13: {
                     14:        int n;
                     15:        if(n=c_due(a)) return(n);
                     16:        reading=0;
                     17:        if(!curunit->uwrt) (void) nowwriting(curunit);
                     18:        return(0);
                     19: }
                     20: c_due(a) cilist *a;
                     21: {
                     22:        if(!init) f_init();
                     23:        if(a->ciunit>=MXUNIT || a->ciunit<0)
                     24:                err(a->cierr,101,"startio");
                     25:        recpos=sequential=formatted=0;
                     26:        external=1;
                     27:        curunit = &units[a->ciunit];
                     28:        elist=a;
                     29:        if(curunit->ufd==NULL && fk_open(DIR,UNF,a->ciunit) ) err(a->cierr,104,"due");
                     30:        cf=curunit->ufd;
                     31:        if(curunit->ufmt) err(a->cierr,102,"cdue")
                     32:        if(!curunit->useek) err(a->cierr,104,"cdue")
                     33:        if(curunit->ufd==NULL) err(a->cierr,114,"cdue")
                     34:        (void) fseek(cf,(long)(a->cirec-1)*curunit->url,0);
                     35:        curunit->uend = 0;
                     36:        return(0);
                     37: }
                     38: e_rdue()
                     39: {
                     40:        if(curunit->url==1 || recpos==curunit->url)
                     41:                return(0);
                     42:        (void) fseek(cf,(long)(curunit->url-recpos),1);
                     43:        if(ftell(cf)%curunit->url)
                     44:                err(elist->cierr,200,"syserr");
                     45:        return(0);
                     46: }
                     47: e_wdue()
                     48: {
                     49:        return(e_rdue());
                     50: }

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