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

   1 /*      $Id: uio.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 #include "fio.h"
  36 int reclen;
  37
  38 static int do_ud(ftnint *number, char *ptr, ftnlen len);
  39
  40 static int
  41 do_us(ftnint *number, char *ptr, ftnlen len)
  42 {
  43         if(reading)
  44         {
  45                 recpos += *number * len;
  46                 if(recpos>reclen)
  47                 {
  48                         err(elist->cierr,110,"eof/uio");
  49                 }
  50                 fread(ptr,(int)len,(int)(*number),cf);
  51                 return(0);
  52         }
  53         else
  54         {
  55                 reclen += *number * len;
  56                 fwrite(ptr,(int)len,(int)(*number),cf);
  57                 return(0);
  58         }
  59 }
  60
  61 int
  62 do_uio(ftnint *number, char *ptr, ftnlen len)
  63 {
  64         if(sequential)
  65                 return(do_us(number,ptr,len));
  66         else    return(do_ud(number,ptr,len));
  67 }
  68
  69 int
  70 do_ud(ftnint *number, char *ptr, ftnlen len)
  71 {
  72         recpos += *number * len;
  73         if(recpos > curunit->url && curunit->url!=1)
  74                 err(elist->cierr,110,"eof/uio");
  75         if(reading)
  76         {
  77                 if(fread(ptr,(int)len,(int)(*number),cf)
  78                         != *number)
  79                         err(elist->cierr,errno,"eof/uio")
  80                 else return(0);
  81         }
  82         fwrite(ptr,(int)len,(int)(*number),cf);
  83         return(0);
  84 }