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Annotation of 41BSD/lib/libI77uc/due.c, revision 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,(ftnint)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:        if (fseek(cf, (long)((a->cirec-1)*curunit->url), 0) < 0)
        !            48:                return(due_err(due));
        !            49:        else
        !            50:                return(OK);
        !            51: }
        !            52: 
        !            53: e_rdue()
        !            54: {
        !            55:        return(OK);
        !            56: }
        !            57: 
        !            58: e_wdue()
        !            59: {/*    This is to ensure full records. It is really necessary. */
        !            60:        int n = 0;
        !            61:        if (curunit->url!=1 && recpos!=curunit->url &&
        !            62:            (fseek(cf, (long)(curunit->url-recpos-1), 1) < 0
        !            63:                || fwrite(&n, 1, 1, cf) != 1))
        !            64:                        return(due_err(due));
        !            65:        return(OK);
        !            66: }

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