Add klon

I've been working on this the past two days. Not playable yet but I
think a good start. I enjoy the card and stack representation too much
and this is probably why I don't enjoy industry programming as much.

1 files changed, 264 insertions, 0 deletions

diff --git a/bin/klon.c b/bin/klon.c
new file mode 100644
index 00000000..a7ef014e
--- /dev/null
+++ b/bin/klon.c
@@ -0,0 +1,264 @@
+#include <assert.h>
+#include <curses.h>
+#include <locale.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define MASK_RANK   (0x0F)
+#define MASK_SUIT   (0x30)
+#define MASK_COLOR  (0x10)
+#define MASK_UP     (0x40)
+#define MASK_SELECT (0x80)
+
+#define SUIT_CLUB    (0x00)
+#define SUIT_DIAMOND (0x10)
+#define SUIT_SPADE   (0x20)
+#define SUIT_HEART   (0x30)
+
+struct Stack {
+    uint8_t data[52];
+    uint8_t index;
+};
+#define EMPTY { .data = {0}, .index = 52 }
+
+static void push(struct Stack *stack, uint8_t value) {
+    assert(stack->index > 0);
+    stack->data[--stack->index] = value;
+}
+
+static uint8_t pop(struct Stack *stack) {
+    assert(stack->index < 52);
+    return stack->data[stack->index++];
+}
+
+static uint8_t get(const struct Stack *stack, uint8_t i) {
+    if (stack->index + i > 51) return 0;
+    return stack->data[stack->index + i];
+}
+
+static uint8_t len(const struct Stack *stack) {
+    return 52 - stack->index;
+}
+
+static struct {
+    struct Stack stock;
+    struct Stack waste;
+    struct Stack found[4];
+    struct Stack table[7];
+} snap, g = {
+    .stock = {
+        .data = {
+            0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
+            0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D,
+            0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
+            0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D,
+            0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
+            0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D,
+            0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
+            0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D,
+        },
+        .index = 0,
+    },
+    .waste = EMPTY,
+    .found = { EMPTY, EMPTY, EMPTY },
+    .table = {
+        EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY
+    },
+};
+
+static void snapshot(void) {
+    memcpy(&snap, &g, sizeof(g));
+}
+
+static void undo(void) {
+    memcpy(&g, &snap, sizeof(g));
+}
+
+static void shuffle(void) {
+    for (int i = 51; i > 0; --i) {
+        int j = arc4random_uniform(i + 1);
+        uint8_t x = g.stock.data[i];
+        g.stock.data[i] = g.stock.data[j];
+        g.stock.data[j] = x;
+    }
+}
+
+static void deal(void) {
+    for (int i = 0; i < 7; ++i) {
+        for (int j = i; j < 7; ++j) {
+            push(&g.table[j], pop(&g.stock));
+        }
+    }
+}
+
+static void reveal(void) {
+    for (int i = 0; i < 7; ++i) {
+        if (get(&g.table[i], 0)) {
+            push(&g.table[i], pop(&g.table[i]) | MASK_UP);
+        }
+    }
+}
+
+static void draw(void) {
+    if (get(&g.stock, 0)) push(&g.waste, pop(&g.stock) | MASK_UP);
+    if (get(&g.stock, 0)) push(&g.waste, pop(&g.stock) | MASK_UP);
+    if (get(&g.stock, 0)) push(&g.waste, pop(&g.stock) | MASK_UP);
+}
+
+static void wasted(void) {
+    for (int i = g.waste.index; i < 52; ++i) {
+        push(&g.stock, pop(&g.waste) & ~MASK_UP);
+    }
+}
+
+static bool validFound(const struct Stack *found, uint8_t card) {
+    if (!get(found, 0)) return true;
+    if ((card & MASK_SUIT) != (get(found, 0) & MASK_SUIT)) return false;
+    return (card & MASK_RANK) == (get(found, 0) & MASK_RANK) + 1;
+}
+
+static bool validTable(const struct Stack *table, uint8_t card) {
+    if (!get(table, 0)) return (card & MASK_RANK) == 13;
+    if ((card & MASK_COLOR) != (get(table, 0) & MASK_COLOR)) return false;
+    return (card & MASK_RANK) == (get(table, 0) & MASK_RANK) - 1;
+}
+
+enum {
+    PAIR_EMPTY = 1,
+    PAIR_BACK,
+    PAIR_BLACK,
+    PAIR_RED,
+};
+
+static void curse(void) {
+    setlocale(LC_CTYPE, "");
+
+    initscr();
+    cbreak();
+    noecho();
+    keypad(stdscr, true);
+    set_escdelay(100);
+    curs_set(0);
+
+    start_color();
+    assume_default_colors(-1, -1);
+    init_pair(PAIR_EMPTY, COLOR_WHITE, COLOR_BLACK);
+    init_pair(PAIR_BACK, COLOR_WHITE, COLOR_BLUE);
+    init_pair(PAIR_BLACK, COLOR_BLACK, COLOR_WHITE);
+    init_pair(PAIR_RED, COLOR_RED, COLOR_WHITE);
+}
+
+static const char rank[] = "\0A23456789TJQK";
+static const char *suit[] = {
+    [SUIT_HEART]   = "♥",
+    [SUIT_CLUB]    = "♣",
+    [SUIT_DIAMOND] = "♦",
+    [SUIT_SPADE]   = "♠",
+};
+
+static void renderCard(int y, int x, uint8_t card) {
+    if (card & MASK_UP) {
+        bkgdset(
+            COLOR_PAIR(card & MASK_COLOR ? PAIR_RED : PAIR_BLACK)
+            | (card & MASK_SELECT ? A_REVERSE : A_NORMAL)
+        );
+
+        move(y, x);
+        addch(rank[card & MASK_RANK]);
+        addstr(suit[card & MASK_SUIT]);
+        addch(' ');
+
+        move(y + 1, x);
+        addstr(suit[card & MASK_SUIT]);
+        addch(' ');
+        addstr(suit[card & MASK_SUIT]);
+
+        move(y + 2, x);
+        addch(' ');
+        addstr(suit[card & MASK_SUIT]);
+        addch(rank[card & MASK_RANK]);
+
+    } else {
+        bkgdset(COLOR_PAIR(PAIR_EMPTY));
+        if (card) {
+            bkgdset(COLOR_PAIR(PAIR_BACK));
+        }
+
+        mvaddstr(y, x, "   ");
+        mvaddstr(y + 1, x, "   ");
+        mvaddstr(y + 2, x, "   ");
+    }
+}
+
+static void render(void) {
+    bkgdset(COLOR_PAIR(0));
+    erase();
+
+    int x = 2;
+    int y = 1;
+
+    renderCard(y, x, get(&g.stock, 0));
+
+    x += 5;
+    renderCard(y, x++, get(&g.waste, 2));
+    renderCard(y, x++, get(&g.waste, 1));
+    renderCard(y, x, get(&g.waste, 0));
+
+    x += 5;
+    for (int i = 0; i < 4; ++i) {
+        renderCard(y, x, get(&g.found[i], 0));
+        x += 4;
+    }
+
+    x = 2;
+    for (int i = 0; i < 7; ++i) {
+        y = 5;
+        for (int j = len(&g.table[i]); j > 0; --j) {
+            renderCard(y, x, get(&g.table[i], j - 1));
+            y++;
+        }
+        x += 4;
+    }
+}
+
+int main() {
+    curse();
+
+    shuffle();
+    deal();
+    snapshot();
+
+    for (;;) {
+        reveal();
+        render();
+
+        switch (getch()) {
+            case 's':
+            case ' ':
+                snapshot();
+                if (get(&g.stock, 0)) {
+                    draw();
+                } else {
+                    wasted();
+                }
+                break;
+
+            case 'w':
+                if (get(&g.waste, 0)) {
+                    push(&g.waste, pop(&g.waste) ^ MASK_SELECT);
+                }
+                break;
+
+            case 'u':
+                undo();
+                break;
+
+            case 'q':
+                endwin();
+                return 0;
+        }
+    }
+}