Add help

.gitignore

@@ -1,2 +1,3 @@
 obj/
 game
+config/

Makefile

@@ -1,7 +1,9 @@
+include config/config.mk
+
 OUT = game
 CFLAGS =
 LDFLAGS =
-INCLUDE = -Iinclude
+INCLUDE = -Iinclude -Iconfig
 CC  = cc
 LD  = ld
 RM  = rm -f

configure

@@ -0,0 +1,52 @@
+#!/bin/sh
+
+if [[ "$*" == *"--help"* ]] || [[ "$*" == *"-h"* ]]
+then
+    echo "Use environment variables to pass values:
+    CC      - compiler (default: cc)
+    CFLAGS  - flags for compiler
+    LDFLAGS - flags for linker
+    OUT     - out file (default: game
+    SIZE    - size of game field
+    DEFX    - start x
+    DEFY    - start y"
+    exit 1
+fi
+
+CC=${CC:-cc}
+RM=${RM:-rm -f}
+CFLAGS=${CFLAGS:-}
+LDFLAGS=${LDFLAGS:-}
+OUT=${OUT:-game}
+SIZE=${SIZE:-10}
+DEFX=${DEFX:-0}
+DEFY=${DEFY:-0}
+
+echo "Makefile configuration:"
+echo "Compiler: $CC"
+echo "Remove: $RM"
+echo "CFLAGS: $CFLAGS"
+echo "LDFLAGS: $LDFLAGS"
+echo "Out file: $OUT"
+echo
+echo "Code configuration:"
+echo "Size: $SIZE"
+echo "Start x: $DEFX"
+echo "Start y: $DEFY"
+
+if ! test -d config; then
+    if test -f config; then
+        rm config
+    fi
+    mkdir config
+fi
+
+echo "CC = $CC
+RM = $RM
+CFLAGS = $CFLAGS
+LDFLAGS = $LDFLAGS
+OUT = $OUT" > config/config.mk
+
+echo "#define SIZE $SIZE
+#define DEFX $DEFX
+#define DEFY $DEFY" > config/config.h

src/main.c

@@ -9,6 +9,7 @@
 #include "screen.h"
 #include "player.h"
 #include "food.h"
+#include "config.h"
 
 void drawPlayer(Player *player, Screen *screen)
 {
@@ -22,7 +23,7 @@ Food generateFood(Player *player)
     Food food;
     do
     {
-        food = (Food){random() % 10, random() % 10};
+        food = (Food){random() % SIZE, random() % SIZE};
     } while (playerCheckFoodCollision(player, food));
     return food;
 }
@@ -30,8 +31,8 @@ Food generateFood(Player *player)
 int main(int argc, char **argv)
 {
     srandom(time(NULL));
-    Player *player = playerCreate(DOWN, 0, 0, 0);
-    Screen *screen = screenCreate(10, 10, ' ');
+    Player *player = playerCreate(DOWN, DEFX, DEFY, 0);
+    Screen *screen = screenCreate(SIZE, SIZE, ' ');
     PlayerNode *node;
     pthread_t input_thread;
     int head_x, head_y;
@@ -68,7 +69,7 @@ int main(int argc, char **argv)
         }
         head_x = player->head->x;
         head_y = player->head->y;
-        if (head_x >= 10 || head_x < 0 || head_y >= 10 || head_y < 0)
+        if (head_x >= SIZE || head_x < 0 || head_y >= SIZE || head_y < 0)
         {
             *running = false;
             break;