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C/C++ Users Group Library 1996 July
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C-C++ Users Group Library July 1996.iso
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v_09_01
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9n01074a
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1990-01-31
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void ADDRESS_BOOK_TREE::alloc_data(NODE *to_node, void *from_data)
{
ADDRESS_BOOK_ENTRY *to = to_node->data;
ADDRESS_BOOK_ENTRY *from = from_data;
to->name = new char[strlen(from->name)+1];
strcpy(to->name, from->name);
to->street_address = new char[strlen(from->street_address)];
strcpy(to->street_address, from->street_address);
// etc. for other fields in an ADDRESS_BOOK_ENTRY
}
void ADDRESS_BOOK_TREE::delete_data(NODE *nptr)
{
ADDRESS_BOOK_ENTRY aptr = nptr->data;
delete to->name;
delete to->street_address;
delete to->city;
delete to->state;
zip = 0L;
}
void ADDRESS_BOOK_TREE::compare(void *v1, void *v2, size_t size)
{
// This function compares the names in each entry, returning
// <0 if d1->name < d2->name, 0 if d1->name == d2->name,
// and >0 if d1->name > d2->name. This is very easy to do
// by using the strcmpl() function. In this case the 'size'
// argument is irrelevant.
ADDRESS_BOOK_ENTRY *d1 = v1, *d2 = v2;
return strcmpl(d1->name, d2->name);
}