Method resize

DEVELOPER/core/ID.cpp:365–416

    

int 
ID::resize(int newSize){

  // first check that newSize is valid
  if (newSize <= 0) {
    opserr << "ID::resize() - size specified " << newSize << " <= 0\n";
    return -1;
  } 
  

  if (sz >= newSize) {

    // is size smaller than current, simply reset sz
    sz = newSize;

  } else if (newSize <= arraySize) {

    // see if we can just enlarge the array
    // without having to go get more space
    
    for (int i=sz; i<newSize; i++)
      data[i] = 0;
    sz = newSize;

  } else if (newSize > arraySize) {

    // otherwise we go get more space
    
    int *newData = new (nothrow) int[newSize];
    if (newData != 0) {
      // copy the old
      for (int i=0; i<sz; i++)
	newData[i] = data[i];
      // zero the new
      for (int j=sz; j<newSize; j++)
	newData[j] = 0;
      
      sz = newSize;
      // release the memory held by the old
      //      free((void *)data);	    
      delete [] data;
      data = newData;
      arraySize = newSize;

    } else {
      opserr << "ID::resize() - out of memory creating ID of size " << newSize << "\n";
      return -1;      
    }
  }

  return 0;
}