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

   1 /*      $Id: sue.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 extern int reclen;
  37 long recloc;
  38
  39 static int c_sue(cilist *a, int flag);
  40
  41 int
  42 s_rsue(cilist *a)
  43 {
  44         int n;
  45         if(!init) f_init();
  46         if((n=c_sue(a,READ))) return(n);
  47         reading=1;
  48         recpos=0;
  49         if(curunit->uwrt) nowreading(curunit);
  50         if(fread(&reclen,sizeof(int),1,cf)
  51                 != 1)
  52         {       if(feof(cf))
  53                 {       curunit->uend = 1;
  54                         err(a->ciend, EOF, "start");
  55                 }
  56                 clearerr(cf);
  57                 err(a->cierr, errno, "start");
  58         }
  59         return(0);
  60 }
  61
  62 int
  63 s_wsue(cilist *a)
  64 {
  65         int n;
  66         if(!init) f_init();
  67         if((n=c_sue(a,WRITE))) return(n);
  68         reading=0;
  69         reclen=0;
  70         if(!curunit->uwrt) nowwriting(curunit);
  71         recloc=ftell(cf);
  72         fseek(cf,(long)sizeof(int),1);
  73         return(0);
  74 }
  75
  76 int
  77 c_sue(cilist *a, int flag)
  78 {
  79         if(a->ciunit >= MXUNIT || a->ciunit < 0)
  80                 err(a->cierr,101,"startio");
  81         external=sequential=1;
  82         formatted=0;
  83         curunit = &units[a->ciunit];
  84         elist=a;
  85         if(curunit->ufd==NULL && fk_open(flag,SEQ,UNF,a->ciunit))
  86                 err(a->cierr,114,"sue");
  87         cf=curunit->ufd;
  88         if(curunit->ufmt) err(a->cierr,103,"sue")
  89         if(!curunit->useek) err(a->cierr,103,"sue")
  90         return(0);
  91 }
  92
  93 int
  94 e_wsue()
  95 {       long loc;
  96         fwrite(&reclen,sizeof(int),1,cf);
  97         loc=ftell(cf);
  98         fseek(cf,recloc,0);
  99         fwrite(&reclen,sizeof(int),1,cf);
 100         fseek(cf,loc,0);
 101         return(0);
 102 }
 103
 104 int
 105 e_rsue()
 106 {
 107         fseek(cf,(long)(reclen-recpos+sizeof(int)),1);
 108         return(0);
 109 }