#include <iostream.h>
#include "StockRecordArray.h"

StockRecordArray::StockRecordArray( int sz ) 
{
  size = sz;
  data = new (StockRecord *)[sz];
}

StockRecordArray::~StockRecordArray()
{
  delete [] data;
}

void StockRecordArray::set_value(int index, StockRecord * value) 
{
  checkBounds(index);
  data[index] = value;
}

// set the value at location index
StockRecord * StockRecordArray::get_value(int index) 
{
  checkBounds(index);
  return data[index];
}

// make sure that the index is 1) non-negative and 2) not beyond the
// array's current length. If the index is beyond the array's current
// length, keep doubling the array's size until the array's length
// exceeds the index. Then copy the elements in the old array to the new
// array.
void StockRecordArray::checkBounds(int index) {
  if (index < 0) {
    cout << "Index " << index << " is negative" << endl;
    exit(1);
  }
  if (index >= size) {
    int old_size = size;
    StockRecord **old_data = data;
    int i;

    while (index >= size) 
      size *= 2;
    data = new (StockRecord *)[size];
    for (i = 0; i < old_size; i++)
      data[i] = old_data[i];
    delete [] old_data;
  }
}