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Annotation of cci/usr/src/usr.lib/libI77/c_dfe.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1980 Regents of the University of California.
        !             3:  * All rights reserved.  The Berkeley software License Agreement
        !             4:  * specifies the terms and conditions for redistribution.
        !             5:  *
        !             6:  *     @(#)c_dfe.c     5.1     6/7/85
        !             7:  */
        !             8: 
        !             9: /*
        !            10:  * direct formatted external i/o - common read/write routines
        !            11:  */
        !            12: 
        !            13: #include "fio.h"
        !            14: 
        !            15: c_dfe(a,paramflag,str) cilist *a; char *str;
        !            16: {      int n;
        !            17:        sequential = NO;
        !            18:        external = formatted = FORMATTED;
        !            19:        lfname = NULL;
        !            20:        elist = NO;
        !            21:        cursor=scale=recpos=reclen=0;
        !            22:        radix = 10;
        !            23:        signit = YES;
        !            24:        fmtbuf = a->cifmt;
        !            25:        errflag = a->cierr;
        !            26:        endflag = a->ciend;
        !            27:        lunit = a->ciunit;
        !            28:        if(not_legal(lunit)) err(errflag,F_ERUNIT,str);
        !            29:        curunit = &units[lunit];
        !            30:        if(!curunit->ufd && (n=fk_open(paramflag,DIR,FMT,(ftnint)lunit)))
        !            31:                err(errflag,n,str)
        !            32:        cf = curunit->ufd;
        !            33:        elist = YES;
        !            34:        lfname = curunit->ufnm;
        !            35:        if(!curunit->ufmt) err(errflag,F_ERNOFIO,str)
        !            36:        if(!curunit->useek || !curunit->url) err(errflag,F_ERNODIO,str)
        !            37:        recnum = a->cirec - 1;
        !            38:        fseek(cf, (long)curunit->url * recnum, 0);
        !            39:        cblank = curunit->ublnk;
        !            40:        cplus = NO;
        !            41:        return(OK);
        !            42: }
        !            43: 
        !            44: y_tab()
        !            45: {      int n;
        !            46:        if(curunit->url==1)
        !            47:        {
        !            48:                if(cursor < 0 && -cursor > ftell(cf)) rewind(cf);
        !            49:                else    fseek(cf,(long)cursor,1);
        !            50:                return(cursor=0);
        !            51:        }
        !            52:        else
        !            53:        {       if(reclen < recpos) reclen = recpos;
        !            54:                if((recpos + cursor) < 0) cursor = -recpos;     /* BOR */
        !            55:                n = reclen - recpos;            /* n >= 0 */
        !            56:                if(!reading && (cursor-n) > 0)
        !            57:                {       recpos = reclen;
        !            58:                        cursor -= n;
        !            59:                        fseek(cf,(long)n,1);
        !            60:                        while(cursor--) if(n=(*putn)(' ')) return(n);
        !            61:                        return(cursor=0);
        !            62:                }
        !            63:                recpos += cursor;
        !            64:                if(recpos >= curunit->url) err(errflag,F_EREREC,"dfe")
        !            65:        }
        !            66:        fseek(cf,(long)cursor,1);
        !            67:        return(cursor=0);
        !            68: }

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