char* cal3(char* a1, char* a2, char* s)
{
char* ret = (char*)malloc(MAXNUM * sizeof(char));
char* r = (char*)malloc(MAXNUM * sizeof(char));
int res = 0;
int i;
int r1 = chars_to_int(a1);
int r2 = chars_to_int(a2);
switch (s[0])
{
case '+': res = r1 + r2; break;
case '-': res = r1 - r2; break;
case '*': res = r1 * r2; break;
case '/': res = r1 / r2; break;
}
if (res >= 0)
ret = int_to_chars(ret, res);
else
{
r = int_to_chars(r, -res);
ret[0] = '-';
ret[1] = 0;
for (i = 0; i < 9; i++)
{
ret[i+1] = r[i];
}
}
return ret;
}
void hash_manager::fheader_page::bufferize(char buffer[hash_manager::page_size]) const {
page::bufferize(buffer);
int_to_chars(n_buckets,&buffer[9]);
int_to_chars(n_pages,&buffer[13]);
int_to_chars(level,&buffer[17]);
int_to_chars(next,&buffer[21]);
}
void hash_manager::pointer_page::bufferize(char buffer[hash_manager::page_size]) const {
int_to_chars(static_cast<int>(ptr_bitmap.to_ulong()),&buffer[9]);
int write_pos = 13;
for (int i=0 ; i<n_pointers ; ++i) {
if (ptr_bitmap[i]) {
int_to_chars(ptr_array[i],&buffer[write_pos]);
write_pos += 4;
}
}
}
void hash_manager::content_page::bufferize(char buffer[hash_manager::page_size]) const {
int_to_chars(static_cast<int>(data_bitmap.to_ulong()),&buffer[9]);
int write_pos = 13;
for (int i=0 ; i<n_data ; ++i) {
if (data_bitmap[i]) {
int_to_chars(data_array[i].first,&buffer[write_pos]);
int_to_chars(data_array[i].second,&buffer[write_pos+4]);
write_pos += 8;
}
}
}
void hash_manager::page::bufferize(char buffer[hash_manager::page_size]) const {
buffer[0] = type;
int_to_chars(parent_pointer,&buffer[1]);
int_to_chars(disc_writes,&buffer[5]);
}