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Annotation of 3BSD/new/libI77uc/due.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * direct unformatted external i/o
                      3:  */
                      4: 
                      5: #include "fio.h"
                      6: 
                      7: char *due = "due";
                      8: 
                      9: s_rdue(a) cilist *a;
                     10: {
                     11:        int n;
                     12:        reading = YES;
                     13:        if(n=c_due(a,READ)) return(n);
                     14:        if(curunit->uwrt) nowreading(curunit);
                     15:        return(OK);
                     16: }
                     17: 
                     18: s_wdue(a) cilist *a;
                     19: {
                     20:        int n;
                     21:        reading = NO;
                     22:        if(n=c_due(a,WRITE)) return(n);
                     23:        curunit->uend = NO;
                     24:        if(!curunit->uwrt) nowwriting(curunit);
                     25:        return(OK);
                     26: }
                     27: 
                     28: c_due(a,flag) cilist *a;
                     29: {      int n;
                     30:        lfname = NULL;
                     31:        elist = NO;
                     32:        sequential=formatted=NO;
                     33:        recpos = reclen = 0;
                     34:        external = YES;
                     35:        errflag = a->cierr;
                     36:        endflag = a->ciend;
                     37:        lunit = a->ciunit;
                     38:        if(not_legal(lunit)) err(errflag,101,due);
                     39:        curunit = &units[lunit];
                     40:        if(!curunit->ufd && (n=fk_open(flag,DIR,UNF,lunit)) )
                     41:                                                err(errflag,n,due);
                     42:        cf = curunit->ufd;
                     43:        elist = YES;
                     44:        lfname = curunit->ufnm;
                     45:        if(curunit->ufmt) err(errflag,103,due)
                     46:        if(!curunit->useek || !curunit->url) err(errflag,104,due)
                     47:        fseek(cf,(long)(a->cirec-1)*curunit->url,0);
                     48:        return(OK);
                     49: }
                     50: 
                     51: e_rdue()
                     52: {
                     53:        if(curunit->url==1 || recpos==curunit->url) return(OK);
                     54:        fseek(cf,(long)(curunit->url-recpos),1);
                     55:        if(ftell(cf)%curunit->url) err(errflag,119,due)
                     56:        return(OK);
                     57: }
                     58: 
                     59: e_wdue()
                     60: {
                     61:        return(e_rdue());
                     62: }

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