libcards(3)

bin/cat

@@ -1,13 +0,0 @@
-#!/bin/sh
-
-alias dd="dd bs=1 2>/dev/null"
-
-if [ -z "$1" ]; then
-	dd </dev/stdin
-	exit 0
-fi
-
-while [ -n "$1" ]; do
-	dd <"$1"
-	shift 1
-done

lib/libcards.c

@@ -0,0 +1,16 @@
+#include "libcards.h"
+
+int
+card_color(int card){
+
+	return card < CARD_HEART_A ? -1 : card_rank(card) < CARD_SUIT_CLOVER;
+}
+
+int
+card_rank(int card){ return card < CARD_HEART_A ? -1 : card % 0x10; }
+
+int
+card_suit(int card){
+
+	return card < CARD_HEART_A ? -1 : card / CARD_SUIT_HEART;
+}

lib/libcards.h

@@ -0,0 +1,45 @@
+enum{
+	CARD_SUIT_HEART = 0x1,
+	CARD_SUIT_TILE = 0x2,
+	CARD_SUIT_CLOVER = 0x3,
+	CARD_SUIT_PIKE = 0x4,
+
+	CARD_RANK_A = 0x00,
+	CARD_RANK_2, CARD_RANK_3, CARD_RANK_4,
+	CARD_RANK_5, CARD_RANK_6, CARD_RANK_7,
+	CARD_RANK_8, CARD_RANK_9, CARD_RANK_10,
+	CARD_RANK_J, CARD_RANK_Q, CARD_RANK_K,
+	CARD_RANK_JOKER /* = 0x0D */
+
+	CARD_HEART_A = 0x10,
+	CARD_HEART_2, CARD_HEART_3, CARD_HEART_4,
+	CARD_HEART_5, CARD_HEART_6, CARD_HEART_7,
+	CARD_HEART_8, CARD_HEART_9, CARD_HEART_10,
+	CARD_HEART_J, CARD_HEART_Q, CARD_HEART_K,
+	CARD_HEART_JOKER /* = 0x1D */,
+
+	CARD_TILE_A = 0x20,
+	CARD_TILE_2, CARD_TILE_3, CARD_TILE_4,
+	CARD_TILE_5, CARD_TILE_6, CARD_TILE_7,
+	CARD_TILE_8, CARD_TILE_9, CARD_TILE_10,
+	CARD_TILE_J, CARD_TILE_Q, CARD_TILE_K,
+	CARD_TILE_JOKER /* = 0x2D */
+
+	CARD_CLOVER_A = 0x30,
+	CARD_CLOVER_2, CARD_CLOVER_3, CARD_CLOVER_4,
+	CARD_CLOVER_5, CARD_CLOVER_6, CARD_CLOVER_7,
+	CARD_CLOVER_8, CARD_CLOVER_9, CARD_CLOVER_10,
+	CARD_CLOVER_J, CARD_CLOVER_Q, CARD_CLOVER_K,
+	CARD_CLOVER_JOKER /* = 0x3D */,
+
+	CARD_PIKE_A = 0x40,
+	CARD_PIKE_2, CARD_PIKE_3, CARD_PIKE_4,
+	CARD_PIKE_5, CARD_PIKE_6, CARD_PIKE_7,
+	CARD_PIKE_8, CARD_PIKE_9, CARD_PIKE_10,
+	CARD_PIKE_J, CARD_PIKE_Q, CARD_PIKE_K,
+	CARD_PIKE_JOKER /* = 0x4D */
+}
+
+int card_color(int card);
+int card_rank(int card);
+int card_suit(int card);