-/* util.c */
-extern void *emalloc(unsigned int size);
-extern void *emallocz(unsigned int size);
-extern void eprint(const char *errstr, ...);
-extern char *estrdup(const char *str);
-extern void swap(void **p1, void **p2);
+/* macros */
+#define INRECT(X,Y,RX,RY,RW,RH) ((X) >= (RX) && (X) < (RX) + (RW) && (Y) >= (RY) && (Y) < (RY) + (RH))
+#define MIN(a, b) ((a) < (b) ? (a) : (b))
+#define MAX(a, b) ((a) > (b) ? (a) : (b))
+#define IS_UTF8_1ST_CHAR(c) ((((c) & 0xc0) == 0xc0) || !((c) & 0x80))
+
+/* forward declarations */
+void drawbar(void);
+void grabkeyboard(void);
+void kpress(XKeyEvent *e);
+void run(void);
+void setup(unsigned int lines);
+
+/* variables */
+extern char *prompt;
+extern char text[4096];
+extern int promptw;
+extern int screen;
+extern unsigned int numlockmask;
+extern unsigned int mw, mh;
+extern unsigned long normcol[ColLast];
+extern unsigned long selcol[ColLast];
+extern Bool topbar;
+extern DC dc;
+extern Display *dpy;
+extern Window win, root;