external/bsd/pcc/dist/pcc-libs/libI77/rsfe.c

   1 /*      $Id: rsfe.c,v 1.1.1.1 2008/08/24 05:34:48 gmcgarry Exp $        */
   2 /*
   3  * Copyright(C) Caldera International Inc. 2001-2002. All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * Redistributions of source code and documentation must retain the above
  10  * copyright notice, this list of conditions and the following disclaimer.
  11  * Redistributions in binary form must reproduce the above copyright
  12  * notice, this list of conditionsand the following disclaimer in the
  13  * documentation and/or other materials provided with the distribution.
  14  * All advertising materials mentioning features or use of this software
  15  * must display the following acknowledgement:
  16  *      This product includes software developed or owned by Caldera
  17  *      International, Inc.
  18  * Neither the name of Caldera International, Inc. nor the names of other
  19  * contributors may be used to endorse or promote products derived from
  20  * this software without specific prior written permission.
  21  *
  22  * USE OF THE SOFTWARE PROVIDED FOR UNDER THIS LICENSE BY CALDERA
  23  * INTERNATIONAL, INC. AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR
  24  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  25  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  26  * DISCLAIMED.  IN NO EVENT SHALL CALDERA INTERNATIONAL, INC. BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OFLIABILITY, WHETHER IN CONTRACT,
  31  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  32  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  33  * POSSIBILITY OF SUCH DAMAGE.
  34  */
  35 /* read sequential formatted external */
  36 #include "fio.h"
  37 #include "fmt.h"
  38 static int x_getc(void), x_endp(void), x_rev(void);
  39 static int xrd_SL(void);
  40
  41 int
  42 s_rsfe(cilist *a) /* start */
  43 {       int n;
  44         if(!init) f_init();
  45         if((n=c_sfe(a,READ))) return(n);
  46         reading=1;
  47         sequential=1;
  48         formatted=1;
  49         external=1;
  50         elist=a;
  51         cursor=recpos=0;
  52         scale=0;
  53         fmtbuf=a->cifmt;
  54         if(pars_f(fmtbuf)<0) err(a->cierr,100,"startio");
  55         curunit= &units[a->ciunit];
  56         cf=curunit->ufd;
  57         getn= x_getc;
  58         doed= rd_ed;
  59         doned= rd_ned;
  60         fmt_bg();
  61         doend=x_endp;
  62         donewrec=xrd_SL;
  63         dorevert=x_rev;
  64         cblank=curunit->ublnk;
  65         cplus=0;
  66         if(curunit->uwrt) nowreading(curunit);
  67         return(0);
  68 }
  69
  70 int
  71 xrd_SL()
  72 {       int ch;
  73         if(!curunit->uend)
  74                 while((ch=getc(cf))!='\n' && ch!=EOF);
  75         cursor=recpos=0;
  76         return(1);
  77 }
  78
  79 int
  80 x_getc()
  81 {       int ch;
  82         if(curunit->uend) return(EOF);
  83         if((ch=getc(cf))!=EOF && ch!='\n')
  84         {       recpos++;
  85                 return(ch);
  86         }
  87         if(ch=='\n')
  88         {       ungetc(ch,cf);
  89                 return(ch);
  90         }
  91         if(feof(cf))
  92         {       errno=0;
  93                 curunit->uend=1;
  94                 return(-1);
  95         }
  96         return(-1);
  97 }
  98
  99 int
 100 x_endp()
 101 {
 102         xrd_SL();
 103         return(0);
 104 }
 105
 106 int
 107 x_rev()
 108 {
 109         xrd_SL();
 110         return(0);
 111 }