1 files changed, 52 insertions, 0 deletions
diff --git a/src/main_stack.c b/src/main_stack.c
new file mode 100644
index 0000000..bae4a88
--- /dev/null
+++ b/src/main_stack.c
@@ -0,0 +1,52 @@
+#include "main_stack.h"
+#include <stdlib.h>
+
+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;
+	}
+}
+
+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
+}
+
+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;
+}