makefile kk

README.md

@@ -0,0 +1,50 @@
+# Handleiding
+
+Geachte speler,
+
+Heb je wel eens rijk willen zijn?
+
+Vast wel.  Mensen met goede bedoelingen (zoals ik) hebben jouw
+daarom meermaals geappt op Telegram om je te vragen of je bij een
+bedrijf XYZ wilt werken.  De werktijden zijn slechts 30 min per
+week, en je verdient 500 euro per dag!
+
+Misschien twijfel je nog.  Geen probleem!  Voor kleine spelers
+zoals jij hebben we een spel genaamd 'gambling-curses'.  In dit
+spel zie je een live grafiek van de laatste Bitcoin-prijs, en heb
+je 10.000 euro op je bankaccount.  Je kunt gemakkelijk traden door
+op 's' en 'b' te klikken.  ('s' betekent SELL, 'b' betekent BUY).
+
+Aangezien de cryptomarkt zeker NIET gamblen is, en er wel degelijk
+een strategie achter zit, kun je zo gaan oefenen.
+
+Met vriendelijke groet,
+
+Crypto/Dropshipping Guru
+
+## Notes aan de TA's
+
+Beste TA,
+
+Het is nu zaterdagavond, en ik heb besloten om de game te laten
+voor wat het is.  Ik had de functies nog beter commentaar moeten
+geven, de code moeten refactoren, bugs moeten fixen, memory moeten
+free()en, ...
+
+Maar daar is nu geen tijd meer voor.  Veel dingen in de code zijn
+ronduit fout.  Als ik nog tijd had, dan had ik de UI-framework
+uitgebreid om textboxes te maken, buttonhovers en een betere
+algoritme voor het tekenen van de boxes.  Ook had ik dan de
+pricechart anders geprogrammeerd zodat de prijzen altijd in zicht
+blijven en niet buiten de box komen, wat momenteel weleens
+gebeurt. (Overigens heb ik hier de NGINX-stijlgids gevolgt.)
+
+Toch is het een geinig spelletje.  Geniet ervan.
+
+Met vriendelijke groet,
+
+Artsiom
+
+UvA-Informaticastudent
+16141253
+

box.c

@@ -17,10 +17,14 @@
 #include "util.h"
 
 
-static void draw_rectangle(double x, double y, double width, double height);
-static void draw_chart(struct box *, double x, double y, double width, double height);
-static void draw_container(struct box *, double x, double y, double width, double height);
-static void draw_button(struct box *, double x, double y, double width, double height);
+static void draw_rectangle(unsigned int x, unsigned int y, unsigned int width,
+    unsigned int height);
+static void draw_chart(struct box *, unsigned int x, unsigned int y,
+    unsigned int width, unsigned int height);
+static void draw_container(struct box *, unsigned int x, unsigned int y,
+    unsigned int width, unsigned int height);
+static void draw_button(struct box *, unsigned int x, unsigned int y,
+    unsigned int width, unsigned int height);
 
 
 void
@@ -31,46 +35,42 @@ append_box(struct box *parent, struct box *child)
 
 
 static void
-draw_rectangle(double fx, double fy, double fwidth, double fheight)
+draw_rectangle(unsigned int x, unsigned int y, unsigned int width,
+    unsigned int height)
 {
-    size_t x = llround(fx);
-    size_t y = llround(fy);
-    size_t w = llround(fwidth) - 1;
-    size_t h = llround(fheight) - 1;
-
     /* corners */
 
     ui_char(x, y, '+');
-    ui_char(x, y + h, '+');
-    ui_char(x + w, y + h, '+');
-    ui_char(x + w, y, '+');
+    ui_char(x, y + height, '+');
+    ui_char(x + width, y + height, '+');
+    ui_char(x + width, y, '+');
 
     /* vertical borders */
 
-    for (size_t i = 1; i < h; i++) {
+    for (size_t i = 1; i < height; i++) {
         ui_char(x, y + i, '|');
     }
 
-    for (size_t i = 1; i < h; i++) {
-    ui_char(x + w, y + i, '|');
+    for (size_t i = 1; i < height; i++) {
+        ui_char(x + width, y + i, '|');
     }
 
     /* horizontal borders */
 
-    for (size_t i = 1; i < w; i++) {
-    ui_char(x + i, y, '-');
+    for (size_t i = 1; i < width; i++) {
+        ui_char(x + i, y, '-');
     }
 
-    for (size_t i = 1; i < w; i++) {
-    ui_char(x + i, y + h, '-');
+    for (size_t i = 1; i < width; i++) {
+        ui_char(x + i, y + height, '-');
     }
 }    
 
 
 static void
-draw_chart(struct box *chart, double x, double y, double width, double height)
+draw_chart(struct box *chart, unsigned int x, unsigned int y,
+    unsigned int width, unsigned int height)
 {
-    char c = '@';
     long int actual_diff;
     double diff, price;
     enum ui_color color;
@@ -86,28 +86,18 @@ draw_chart(struct box *chart, double x, double y, double width, double height)
     actual_diff = 0;
 
     for (size_t i = 0; i < width; i++) {
-    diff = (double)rand() / RAND_MAX - 0.6;
-    actual_diff =  (size_t)(height + y - price) - (size_t)(height + y - (price + diff));
+        price = chart->chart->prices[i];
 
-    if (actual_diff > 0)  {
-    color = UI_GREEN;
-    } else if (actual_diff == 0) {
-    color = UI_NONE;
-    } else if (actual_diff < 0) {
-    color = UI_RED;
-    }
-
-    ui_color_on(color);
-    ui_char(x + i, height + y - price, c);
-    ui_color_off(color);
-
-    price += diff;
+        ui_color_on(UI_BLUE);
+        ui_char(x + i, height + y - price, '@');
+        ui_color_off(UI_BLUE);
     }
 }
 
 
 static void
-draw_button(struct box *b, double x, double y, double width, double height)
+draw_button(struct box *b, unsigned int x, unsigned int y, unsigned int width,
+    unsigned int height)
 {
     ui_color_on(b->color);
     draw_rectangle(x, y, width, height);
@@ -117,54 +107,59 @@ draw_button(struct box *b, double x, double y, double width, double height)
 
 
 static void
-draw_container(struct box *b, double x, double y, double width, double height)
+draw_container(struct box *b, unsigned int x, unsigned int y,
+    unsigned int width, unsigned int height)
 {
-    double       current, length, total_fills, pixels_per_fill;
-    struct box  *child;
+    unsigned int   current, i, length, total_fills, pixels_per_fill;
+    struct box    *child;
 
     switch (b->type) {
     case BOX_VERTICAL:
-    length = height;
-    current = y;
-    break;
+        length = height;
+        current = y;
+        break;
     case BOX_HORIZONTAL:
-    length = width;
-    current = x;
-    break;
+        length = width;
+        current = x;
+        break;
     }
     
     total_fills = 0;
-    for (size_t i = 0; i < b->length; i++) {
-    total_fills += b->children[i]->fills;
+    for (i = 0; i < b->length; i++) {
+        total_fills += b->children[i]->fills;
     }
 
     pixels_per_fill = length / total_fills;
 
-    for (size_t i = 0; i < b->length; i++) {
-    child = b->children[i];
-    length = child->fills * pixels_per_fill;
+    for (i = 0; i < b->length; i++) {
+        child = b->children[i];
+        length = child->fills * pixels_per_fill;
 
-    switch (b->type) {
-    case BOX_VERTICAL:   draw_box(child, x, current, width, length);  break;
-    case BOX_HORIZONTAL: draw_box(child, current, y, length, height); break;
-    }
+        switch (b->type) {
+        case BOX_VERTICAL:
+            draw_box(child, x, current, width, length);
+            break;
+        case BOX_HORIZONTAL:
+            draw_box(child, current, y, length, height);
+            break;
+        }
 
-    current += length;
+        current += length;
     }
 }
 
 
 struct box *
-new_chart_box(void)
+new_chart_box(struct chart *chart)
 {
-    struct box *chart = malloc(sizeof(struct box));
+    struct box *box = malloc(sizeof(struct box));
 
-    chart->type = BOX_CHART;
-    chart->prices = emalloc(sizeof(double) * 100);
-    chart->fills = 1;
-    chart->color = UI_NONE;
+    box->type = BOX_CHART;
+    box->chart = chart;
+    box->fills = 1;
+    box->color = UI_NONE;
 
-    return chart;
+    return box;
 }
 
 
@@ -211,7 +206,8 @@ new_vertical_box(void)
 
 
 void
-draw_box(struct box *b, double x, double y, double width, double height)
+draw_box(struct box *b, unsigned int x, unsigned int y, unsigned int width,
+    unsigned int height)
 {
     switch (b->type) {
     case BOX_BUTTON:

box.h

@@ -8,6 +8,7 @@
  
 #pragma once
 
+#include "chart.h"
 #include "ui.h"
 
 
@@ -21,24 +22,19 @@ enum box_type {
 struct box {
     enum box_type type;
     enum ui_color color;
-    double fills;
+    unsigned int fills;
 
     union {
         /* button */
         char *name;
 
-        /* chart and vertical/horizontal box */
+        /* chart */
+        struct chart *chart;
+
+        /* vertical/horizontal  */
         struct {
-            /* chart and vertical/horizontal box */
             size_t length;
-
-            union {
-                /* vertical/horizontal box */
-                struct box **children;
-
-                /* chart */
-                double *prices;
-            };
+            struct box **children;
         };
     };
 };
@@ -47,8 +43,9 @@ struct box {
 struct box *new_button_box(char *name);
 struct box *new_vertical_box(void);
 struct box *new_horizontal_box(void);
-struct box *new_chart_box(void);
+struct box *new_chart_box(struct chart *);
 
 void append_box(struct box *parent, struct box *child);
 
-void draw_box(struct box *, double x, double y, double width, double height);
+void draw_box(struct box *, unsigned int x, unsigned int y, unsigned int width,
+    unsigned int height);

chart.c

@@ -0,0 +1,43 @@
+
+/*
+ * Copyright (C) Artsiom D.
+ * Copyright (C) shit-co.de
+ */
+
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "chart.h"
+#include "util.h"
+
+
+struct chart
+new_chart(unsigned int length)
+{
+    unsigned int  i;
+    double        price;
+    struct chart  chart;
+
+    chart.prices = emalloc(sizeof(double) * length);
+    chart.length = length;
+
+    /* populate with random prices */
+
+    price = 10;
+    
+    for (i = 0; i < length; i++) {
+        chart.prices[i] = price;
+        price += (double)rand() / RAND_MAX * 4 - 2;
+    }
+
+    return chart;
+}
+
+
+void
+update_chart(struct chart *chart)
+{
+    memmove(chart->prices, chart->prices + 1, (chart->length - 1) * sizeof(double));
+    chart->prices[chart->length - 1] = chart->prices[chart->length - 2] + (double)rand() / RAND_MAX * 4 - 2;
+}

chart.h

@@ -0,0 +1,18 @@
+
+/*
+ * Copyright (C) Artsiom D.
+ * Copyright (C) shit-co.de
+ */
+
+ 
+#pragma once
+
+
+struct chart {
+    double *prices;     
+    unsigned int length;
+};
+
+
+void update_chart(struct chart *);
+struct chart new_chart(unsigned int length);

main.c

@@ -5,20 +5,35 @@
  */
  
 
+#include <curses.h>
+#include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
-#include <curses.h>
+#include <time.h>
 
 #include "box.h"
 #include "ui.h"
+#include "util.h"
 
 
-int
-main(void)
+enum game_state {
+    GAME_IDLE,   /* can buy AND sell */
+    GAME_BOUGHT, /* cannot buy again */
+    GAME_SOLD,   /* cannot sell again */
+};
+
+struct game {
+    unsigned int     dollars;
+    struct chart     chart;  
+    enum game_state  state;
+};
+
+
+struct box *
+initialize_ui_from_game(struct game *game)
 {
-    struct box *ui, *top, *bottom, *left, *right, *buy, *sell, *scam, *title, *desc;
-
-    ui_init();
+    struct box    *ui, *top, *bottom, *left, *right, *buy, *sell, *bank,
+                  *title, *desc;
     
     title = new_button_box("Bitcoin");
     desc = new_button_box("A crypto-scam :-)");
@@ -27,20 +42,25 @@ main(void)
     append_box(top, title);
     append_box(top, desc);
 
-    left = new_chart_box();
+    left = new_chart_box(&game->chart);
     left->fills = 5;
 
     buy = new_button_box("buy");
     buy->color = UI_GREEN;
     sell = new_button_box("sell");
     sell->color = UI_RED;
-    scam = new_button_box("scam");
+
+    char *bank_text = emalloc(500);
+
+    sprintf(bank_text, "YOU HAVE $%d.", game->dollars);
+    
+    bank = new_button_box(bank_text);
     sell->color = UI_BLUE;
 
     right = new_vertical_box();
     append_box(right, buy);
     append_box(right, sell);
-    append_box(right, scam);
+    append_box(right, bank);
 
     bottom = new_horizontal_box();
     bottom->fills = 3;
@@ -51,11 +71,82 @@ main(void)
     append_box(ui, top);
     append_box(ui, bottom);
 
-    draw_box(ui, 0, 0, ui_width()-1, ui_height()-1);
+    return ui;
+}
 
-    ui_refresh();
 
-    sleep(300);
+/*
+ * Buy 50 coins, price = last price in chart.
+ */
+void game_buy(struct game *game)
+{
+    if (game->state != GAME_IDLE) {
+        return;
+    }
+
+    game->dollars -= game->chart.prices[game->chart.length - 1] * 50;
+    game->state = GAME_BOUGHT;
+}
+
+
+/*
+ * Sell 50 coins, price = last price in chart.
+ */
+void game_sell(struct game *game)
+{
+    if (game->state != GAME_BOUGHT) {
+        return;
+    }
+
+    game->dollars += game->chart.prices[game->chart.length - 1] * 50;
+    game->state = GAME_IDLE;
+}
+
+
+int
+main(void)
+{
+    int           framerate;
+    struct box   *ui;
+    struct game   game;
+
+    framerate = 10;
+
+    game.state = GAME_IDLE;
+    game.dollars = 10000;
+    game.chart = new_chart(200);
+
+    ui_init();
+
+    ui = initialize_ui_from_game(&game);
+
+    for (;;) {
+        draw_box(ui, 0, 0, ui_width(), ui_height());
+
+        ui_refresh();
+
+        clock_t current = clock();
+        clock_t max = current + CLOCKS_PER_SEC * (1.0/framerate);
+
+        for (;;) {
+            switch (getch()) {
+            case 'b':
+                game_buy(&game);
+                break;
+            case 's':
+                game_sell(&game);
+                break;
+            }
+
+            if (clock() >= max) {
+                break;
+            }
+        }
+        
+        update_chart(&game.chart);
+        ui_clear();
+        ui = initialize_ui_from_game(&game);
+    }
 
     ui_end();
 }

makefile

@@ -1,14 +1,19 @@
-CFLAGS = -std=c23 -Wextra -pedantic -Wall -pedantic
-LDFLAGS = -lncurses
+CFLAGS = -std=c11 -Wextra -pedantic -Wall -O0 -g3 -fsanitize=address
+LDFLAGS = -lncurses -fsanitize=address
 
-main: box.o main.o ui.o util.o
+main: box.o main.o ui.o util.o chart.o
 
 .PHONY: clean
 
 box.o: box.c
+chart.o: chart.c
 main.o: main.c
 ui.o: ui.c
 util.o: util.c
 
+tarball2: deel2.tar.gz
+deel2.tar.gz: box.c chart.c main.c ui.c util.c box.h chart.h util.h ui.h util.h README.md makefile
+	tar czf $@ $^
+
 clean:
-	rm *.o main
+	rm -f *.o main

ui.c

@@ -22,6 +22,7 @@ ui_init(void)
     init_pair(UI_BLUE,  COLOR_BLUE,  COLOR_BLACK);
     cbreak();
     noecho();
+    nodelay(stdscr, TRUE);
     nonl();
     intrflush(stdscr, FALSE);
     keypad(stdscr, TRUE);
@@ -29,17 +30,17 @@ ui_init(void)
     refresh();
 }
 
-void ui_end()
+void ui_end(void)
 {
     endwin();
 }
 
-void ui_string(size_t x, size_t y, char *s)
+void ui_string(unsigned int x, unsigned int y, char *s)
 {
     mvaddstr(y, x, s);
 }
 
-void ui_char(size_t x, size_t y, char c)
+void ui_char(unsigned int x, unsigned int y, char c)
 {
     mvaddch(y, x, c);
 }

ui.h

@@ -22,8 +22,8 @@ void ui_end(void);
 void ui_color_on(enum ui_color);
 void ui_color_off(enum ui_color);
 
-void ui_char(size_t x, size_t y, char c);
-void ui_string(size_t x, size_t y, char *s);
+void ui_char(unsigned int x, unsigned int y, char c);
+void ui_string(unsigned int x, unsigned int y, char *s);
 
 size_t ui_width(void);
 size_t ui_height(void);

util.c

@@ -23,7 +23,7 @@ emalloc(size_t n)
 }
 
 
-void
+noreturn void
 die(char *fmt, ...)
 {
     va_list va;

util.h

@@ -8,7 +8,8 @@
 #pragma once
 
 #include <stddef.h>
+#include <stdnoreturn.h>
 
 
 void *emalloc(size_t n);
-void die(char *fmt, ...);
+noreturn void die(char *fmt, ...);