/*
* Helper function to push element onto heap.
* Element is added at the end of the heap and pushed up.
*/
double * push_sum(double heap[], unsigned int last,
double sum)
{
heap[last]= sum;
if( last > 0 ) pull_up(heap, last, last);
return heap;
}
/*
* Helper function to pull element up a heap.
*/
void pull_up(double heap[], unsigned int n, unsigned int i)
{
int parent = (i-1)/2;
if( i > 0 && heap[i] < heap[parent] ){
double temp = heap[parent];
heap[parent] = heap[i];
heap[i] = temp;
pull_up(heap, n, parent);
}
}
void update(Node *proot, int start, int end, int value)
{
if (start > proot->r || end < proot->l)
return;
start = max(start, proot->l);
end = min(end, proot->r);
if (start == proot->l && end == proot->r)
{
//do something
return;
}
push_down(proot);
update(proot->pleft, start, end, value);
update(proot->pright, start, end, value);
pull_up(proot);
}
int query(Node *proot, int start, int end)
{
int ret = 0;
if (start > proot->r || end < proot->l)
return 0;
start = max(start, proot->l);
end = min(end, proot->r);
if (start == proot->l && end == proot->r)
{
//do something
return;
}
push_down(proot);
ret = max(ret, query(proot->pleft, start, end));
ret = max(ret, query(proot->pright, start, end));
pull_up(proot);
return ret;
}
void iv_timer_unregister(struct iv_timer *_t)
{
struct iv_state *st = iv_get_state();
struct iv_timer_ *t = (struct iv_timer_ *)_t;
struct iv_timer_ **m;
struct iv_timer_ **p;
if (t->index == -1) {
iv_fatal("iv_timer_unregister: called with timer not "
"on the heap");
}
if (t->index > st->num_timers) {
iv_fatal("iv_timer_unregister: timer index %d > %d",
t->index, st->num_timers);
}
p = get_node(st, t->index);
if (*p != t) {
iv_fatal("iv_timer_unregister: unregistered timer "
"index belonging to other timer");
}
st->numobjs--;
m = get_node(st, st->num_timers);
st->num_timers--;
*p = *m;
(*p)->index = t->index;
*m = NULL;
if (p != m) {
pull_up(st, (*p)->index, p);
push_down(st, (*p)->index, p);
}
t->index = -1;
}
void iv_timer_register(struct iv_timer *_t)
{
struct iv_state *st = iv_get_state();
struct iv_timer_ *t = (struct iv_timer_ *)_t;
struct iv_timer_ **p;
int index;
if (t->index != -1) {
iv_fatal("iv_timer_register: called with timer still "
"on the heap");
}
st->numobjs++;
index = ++st->num_timers;
p = get_node(st, index);
if (p == NULL)
iv_fatal("iv_timer_register: timer list overflow");
*p = t;
t->index = index;
pull_up(st, index, p);
}
// Make a new pin object from a string
Pin* Pin::from_string(std::string value){
LPC_GPIO_TypeDef* gpios[5] ={LPC_GPIO0,LPC_GPIO1,LPC_GPIO2,LPC_GPIO3,LPC_GPIO4};
// cs is the current position in the string
const char* cs = value.c_str();
// cn is the position of the next char after the number we just read
char* cn = NULL;
// grab first integer as port. pointer to first non-digit goes in cn
this->port_number = strtol(cs, &cn, 10);
// if cn > cs then strtol read at least one digit
if ((cn > cs) && (port_number <= 4)){
// translate port index into something useful
this->port = gpios[(unsigned int) this->port_number];
// if the char after the first integer is a . then we should expect a pin index next
if (*cn == '.'){
// move pointer to first digit (hopefully) of pin index
cs = ++cn;
// grab pin index.
this->pin = strtol(cs, &cn, 10);
// if strtol read some numbers, cn will point to the first non-digit
if ((cn > cs) && (pin < 32)){
this->port->FIOMASK &= ~(1 << this->pin);
// now check for modifiers:-
// ! = invert pin
// o = set pin to open drain
// ^ = set pin to pull up
// v = set pin to pull down
// - = set pin to no pull up or down
// @ = set pin to repeater mode
for (;*cn;cn++) {
switch(*cn) {
case '!':
this->inverting = true;
break;
case 'o':
as_open_drain();
break;
case '^':
pull_up();
break;
case 'v':
pull_down();
break;
case '-':
pull_none();
break;
case '@':
as_repeater();
break;
default:
// skip any whitespace following the pin index
if (!is_whitespace(*cn))
return this;
}
}
return this;
}
}
}
// from_string failed. TODO: some sort of error
port_number = 0;
port = gpios[0];
pin = 255;
inverting = false;
return this;
}