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/*****************************************************************************
* ___ __ __ ___ _ __ *
* / _ \\ \/ // _ \ '_ \ *
* | (_) |> <| __/ | | | *
* \___//_/\_\\___|_| |_| *
* *
* The card game *
* *
* Copyright (C) 2011, Reiner Herrmann <reiner@reiner-h.de> *
* Mario Kilies <MarioKilies@GMX.net> *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 3 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program. If not, see <http://www.gnu.org/licenses/>. *
* *
*****************************************************************************/
#include "main_stack.h"
#include <stdlib.h>
/**
* Initialize main stack: Assign valid cards and shuffle it
* @param[in,out] m Pointer to main stack
*/
void main_stack_init(main_stack_t *m)
{
assert(m != NULL);
// assign card values to main stack
for(int i = 0; i < MAX_MAIN_STACK_CARDS; i++)
m->cards[i] = i + 1;
// shuffle stack
for(int i = 0; i < 3 * MAX_MAIN_STACK_CARDS; i++)
{
uint32_t x = rand() % MAX_MAIN_STACK_CARDS;
uint32_t y = rand() % MAX_MAIN_STACK_CARDS;
card tmp = m->cards[x];
m->cards[x] = m->cards[y];
m->cards[y] = tmp;
}
}
/**
* Draw card on top of main stack and mark it as removed
* @param[in,out] m Pointer to main stack
* @return Card on top of stack
*/
card main_stack_remove_card(main_stack_t *m)
{
assert(m != NULL);
for(int i = 0; i < MAX_MAIN_STACK_CARDS; i++)
{
card c = m->cards[i];
if(c == 0)
continue;
m->cards[i] = 0;
return c;
}
return 0; // stack empty
}
/**
* Returns number of cards remaining in main stack
* @param[in] m Pointer to main stack
* @return Number of cards in stack
*/
uint8_t main_stack_size(const main_stack_t *m)
{
assert(m != NULL);
uint8_t count = 0;
for(uint8_t i = 0; i < MAX_MAIN_STACK_CARDS; i++)
{
if(m->cards[i] == 0)
continue;
count++;
}
return count;
}
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