Table.cc

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/*
Copyright (C) 2000  Dancer A.L Vesperman

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/

#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif

#include "Table.h"

#ifndef ALPHA_LINUX_CXX
#  include <cstdio>
#endif
#include <iostream>
#include "exceptions.h"
#include "utils.h"

using std::string;
using std::vector;

using std::cout;
using std::cerr;
using std::endl;
using std::FILE;
using std::size_t;


Table::Table(const string &n) : U7file(n)
{
  IndexTableFile();
}


void  Table::IndexTableFile(void)
{
  Table &ret=*this;
  FILE  *fp;
  try {
    fp=U7open(ret.filename.c_str(),"rb");
  } catch (const file_open_exception &e)
  {
    cerr << e.what() << ". exiting." << endl;
    std::exit(1);
  }
  fseek(fp,0,SEEK_END);
  size_t file_size=ftell(fp);
  fseek(fp,0,SEEK_SET);
  unsigned int i=0;
  while(1)
    {
    Table::Reference f;
    f.size = Read2(fp);
//    fread(&f.size,sizeof(uint16),1,fp);
    if(f.size==65535)
      break;
    f.offset = Read4(fp);
//    fread(&f.offset,sizeof(uint32),1,fp);
    if(f.size>file_size||f.offset>file_size)
      throw wrong_file_type_exception(filename,"Table");
#if 0
    cout << "Item " << i << ": " << f.size << " @ " << f.offset << endl;
#endif
    ret.object_list.push_back(f);
    i++;
    }
  fclose(fp);
  return;
}


char* Table::retrieve(uint32 objnum,size_t &len)
{ throw exult_exception("Illegal call to Table::retrieve()"); }

#if 0
char  *Table::read_object(int objnum,uint32 &length)
{
  if((unsigned)objnum>=object_list.size())
    {
    cerr << "objnum too large in read_object()" << endl;
    return 0;
    }
  FILE *fp;
  try {
    fp=U7open(filename.c_str(),"rb");
  } catch (const file_open_exception &e)
  {
    cerr << e.what() << ". exiting." << endl;
    exit(1);
  }
  if(!fp)
    {
    cerr << "File open failed in read_object: " << filename << endl;
    return 0;
    }
  fseek(fp,object_list[objnum].offset,SEEK_SET);
  // length=object_list[objnum].size;
  uint16  sz;
  sz = Read2(fp);
//  fread(&sz,sizeof(sz),1,fp);
  length=sz-2;
  char  *ret=new char[length];
  fread(ret,length,1,fp);
  fclose(fp);
  return ret;
}
#endif

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