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#include "card_stack.h"
#include <assert.h>
#include <stdlib.h>
/**
* Calculates the points of a card stack. This will be the sum of the points of all cards contained in the card stack.
* @param[in] cs The card stack fir which the points will be calculated
*/
uint32_t card_stack_get_points(const card_stack_t *cs)
{
assert(cs != NULL);
uint32_t points = 0;
for(uint8_t i = 0; i < MAX_CARD_STACK_SIZE; i++)
{
if(cs->cards[i] > 0)
points += card_get_points(cs->cards[i]);
}
return points;
}
/**
* Determines the uppermost card on a card stack. The card will not be removed from the stack.
* @param[in] cs The card stack from which the uppermost card will be retrieved
*/
const card card_stack_top(const card_stack_t *cs)
{
assert(cs != NULL);
for(int i = 0; i < MAX_CARD_STACK_SIZE; i++)
{
card cur = cs->cards[MAX_CARD_STACK_SIZE-1-i];
if(cur != 0)
return cur;
}
return 0;
}
/**
* Places a card on top of a card stack.
* @param[in] cs The card stack to place the card on
* @param[in] c The card to place
*/
void card_stack_push(card_stack_t *cs, const card c)
{
assert(cs != NULL);
for(int i = 0; i < MAX_CARD_STACK_SIZE; i++)
{
if(cs->cards[i] != 0)
continue;
cs->cards[i] = c;
break;
}
}
/**
* Replaces a card stack with a single card. All cards within the card stack will be removed and the first card will be set to a given card.
* @param[in] cs The card stack to replace
* @param[in] new_card The new first card
*/
void card_stack_replace(card_stack_t *cs, const card new_card)
{
assert(cs != NULL);
for(int i = 0; i < MAX_CARD_STACK_SIZE; i++)
cs->cards[i] = 0;
cs->cards[0] = new_card;
}
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