1 files changed, 64 insertions, 0 deletions
diff --git a/client/card_handling.c b/client/card_handling.c
new file mode 100644
index 0000000..011ad40
--- /dev/null
+++ b/client/card_handling.c
@@ -0,0 +1,64 @@
+#include "card_handling.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+int convert_rank_to_int(const char *card)
+{
+    int length;
+    char str_rank[2];
+
+    length = strlen(card);
+    /* 10 - the only one of its kind */
+    if(length == 3)
+        return 10;
+
+    str_rank[0] = card[0];
+    str_rank[1] = '\0';
+
+    switch(card[0]) {
+    case 'J':
+        return 11;
+    case 'Q':
+        return 12;
+    case 'K':
+        return 13;
+    case 'A':
+        return 14;
+    default:
+        return strtol(str_rank, NULL, 10);
+    }
+    return 0;
+}
+
+int is_card_beaten(const char *attack_card, const char *defend_card,
+                   const char *trump_suit)
+{
+    int length, attack_rank, defend_rank;
+    const char *attack_suit, *defend_suit;
+
+    length = strlen(attack_card);
+    attack_suit= attack_card + length - 1;
+    length = strlen(defend_card);
+    defend_suit = defend_card + length - 1;
+
+    /* suits matched */
+    if(!strcmp(attack_suit, defend_suit)) {
+        attack_rank = convert_rank_to_int(attack_card);
+        defend_rank = convert_rank_to_int(defend_card);
+        if(defend_rank > attack_rank)
+            return 1;
+        /* defender has a trump suit */
+    } else if(!strcmp(defend_suit, trump_suit))
+        return 1;
+    return 0;
+}
+
+int check_matched_ranks(const char *attack_card, const char *not_defender_card)
+{
+    int attack_rank, not_defender_rank;
+
+    attack_rank = convert_rank_to_int(attack_card);
+    not_defender_rank = convert_rank_to_int(not_defender_card);
+    return attack_rank == not_defender_rank;
+}