BSD 4_3 release

[unix-history] / usr / src / usr.lib / libI77 / c_iio.c

/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved.  The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*
*      @(#)c_iio.c     5.2     7/30/85
*/

/*
* internal (character array) i/o: common portions
*/

#include "fio.h"
#include "lio.h"

LOCAL icilist *svic;            /* active internal io list */
LOCAL lio_nl;

int z_wnew();

z_getc()
{
       if(formatted == LISTDIRECTED )
       {
               if( lio_nl == YES )
               {
                       recnum++;
                       recpos = 0;
               }
               else if (recpos == svic->icirlen)
               {
                       lio_nl = YES;
                       return('\n');
               }
               lio_nl = NO;
       }

       if(icptr >= icend && !recpos)   /* new rec beyond eof */
       {       leof = EOF;
               return(EOF);
       }
       if(recpos++ < svic->icirlen) return(*icptr++);
       return(' ');
}

z_putc(c) char c;
{
       if(icptr < icend)
       {       if(c=='\n') return(z_wnew());
               if(recpos++ < svic->icirlen)
               {       *icptr++ = c;
                       return(OK);
               }
               else err(errflag,F_EREREC,"iio")
       }
       leof = EOF;
#ifndef KOSHER
       err(endflag,EOF,"iio")   /* NOT STANDARD, end-of-file on writes */
#endif
#ifdef KOSHER
       err(errflag,F_EREREC,"iio")
#endif
}

z_ungetc(ch,cf) char ch;
{       
       if( lio_nl == YES )
       {
               lio_nl = NO;
               return(OK);
       }
       if(ch==EOF || --recpos >= svic->icirlen) return(OK);
       if(--icptr < svic->iciunit || recpos < 0) err(errflag,F_ERBREC,"ilio")
       *icptr = ch;
       return(OK);
}

LOCAL
c_fi(a) icilist *a;
{
       fmtbuf=a->icifmt;
       formatted = FORMATTED;
       external = NO;
       cblank=cplus=NO;
       scale=cursor=0;
       radix = 10;
       signit = YES;
       elist = YES;
       svic = a;
       recpos=reclen=0;
       icend = a->iciunit + a->icirnum*a->icirlen;
       errflag = a->icierr;
       endflag = a->iciend;
       return(OK);
}

c_si(a) icilist *a;
{
       sequential = YES;
       recnum = 0;
       icptr = a->iciunit;
       return(c_fi(a));
}

c_di(a) icilist *a;
{
       sequential = NO;
       recnum = a->icirec - 1;
       icptr = a->iciunit + recnum*a->icirlen;
       return(c_fi(a));
}

z_rnew()
{
       icptr = svic->iciunit + (++recnum)*svic->icirlen;
       recpos = reclen = cursor = 0;
       return(OK);
}

z_wnew()
{
       if(reclen > recpos)
       {       icptr += (reclen - recpos);
               recpos = reclen;
       }
       while(recpos < svic->icirlen) (*putn)(' ');
       recpos = reclen = cursor = 0;
       recnum++;
       return(OK);
}

z_tab()
{       int n;
       if(reclen < recpos) reclen = recpos;
       if((recpos + cursor) < 0) cursor = -recpos;     /* to BOR */
       n = reclen - recpos;
       if(!reading && (cursor-n) > 0)
       {       icptr += n;
               recpos = reclen;
               cursor -= n;
               while(cursor--) if(n=(*putn)(' ')) return(n);
       }
       else
       {       icptr += cursor;
               recpos += cursor;
       }
       return(cursor=0);
}

c_li(a) icilist *a;
{
       fmtbuf="int list io";
       sequential = YES;
       formatted = LISTDIRECTED;
       external = NO;
       elist = YES;
       svic = a;
       recnum = recpos = 0;
       cplus = cblank = NO;
       lio_nl = NO;
       icptr = a->iciunit;
       icend = icptr + a->icirlen * a->icirnum;
       errflag = a->icierr;
       endflag = a->iciend;
       leof = NO;
       return(OK);
}