lsfs_16-bit/std_singos/stdlib.h

unsigned int global_heap_start = 0;
unsigned int global_heap_end = 0;
unsigned int global_heap_next = 0;

void* malloc(num_bytes);
void* calloc(number_elements, size);
int set_heap_settings(param_start, param_end);
unsigned int get_heap_next();

void* malloc(num_bytes)
int num_bytes;
{
	unsigned int allocated_pointer = global_heap_next;
	global_heap_next = global_heap_next + num_bytes;
	if (global_heap_next > global_heap_end)
	{
		return 0; /* No more memory */
	}

	return allocated_pointer;
}

void* calloc(number_elements, size)
unsigned int number_elements;
unsigned int size;
{
	int i;
	char* temp_pointer;
	unsigned int num_bytes = number_elements * size;
	void* allocated_pointer = global_heap_next;
	global_heap_next = global_heap_next + num_bytes;
	if (global_heap_next > global_heap_end)
	{
		return 0; /* No more memory */
	}

	/* Since this is calloc, we set the memory to zero */
	temp_pointer = allocated_pointer;
	for (i = 0; i < num_bytes; ++i)
	{
		*temp_pointer = 0;
		temp_pointer++;
	}

	return allocated_pointer;
}

int set_heap_settings(param_start, param_end)
unsigned int param_start;
unsigned int param_end;
{
	global_heap_start = param_start;
	global_heap_next = param_start;
	global_heap_end = param_end;
	return 0;
}

unsigned int get_heap_next() 
{
	return global_heap_next;
}