-extern const char *tags[]; /* all tags */
-extern char stext[256]; /* status text */
-extern int screen, sx, sy, sw, sh; /* screen geometry */
-extern int wax, way, wah, waw; /* windowarea geometry */
-extern unsigned int bh, blw; /* bar height, bar layout label width */
-extern unsigned int master, nmaster; /* master percent, number of master clients */
-extern unsigned int ntags, numlockmask; /* number of tags, dynamic lock mask */
-extern void (*handler[LASTEvent])(XEvent *); /* event handler */
-extern Atom wmatom[WMLast], netatom[NetLast];
-extern Bool running, selscreen, *seltag; /* seltag is array of Bool */
-extern Client *clients, *sel, *stack; /* global client list and stack */
-extern Cursor cursor[CurLast];
-extern DC dc; /* global draw context */
-extern Display *dpy;
-extern Layout *lt;
-extern Window root, barwin;
-
-/* client.c */
-extern void configure(Client *c); /* send synthetic configure event */
-extern void focus(Client *c); /* focus c, c may be NULL */
-extern void focusnext(Arg *arg); /* focuses next visible client, arg is ignored */
-extern void focusprev(Arg *arg); /* focuses previous visible client, arg is ignored */
-extern void killclient(Arg *arg); /* kill c nicely */
-extern void manage(Window w, XWindowAttributes *wa); /* manage new client */
-extern Client *nexttiled(Client *c); /* returns tiled successor of c */
-extern void resize(Client *c, int x, int y,
- int w, int h, Bool sizehints); /* resize with given coordinates c*/
-extern void updatesizehints(Client *c); /* update the size hint variables of c */
-extern void updatetitle(Client *c); /* update the name of c */
-extern void unmanage(Client *c); /* destroy c */
-extern void zoom(Arg *arg); /* zooms the focused client to master area, arg is ignored */
-
-/* event.c */
-extern void grabkeys(void); /* grab all keys defined in config.h */
-
-/* main.c */
-extern void drawstatus(void); /* draw the bar */
-extern unsigned int textw(const char *text); /* return the width of text in px*/
-extern void quit(Arg *arg); /* quit dwm nicely */
-extern void sendevent(Window w, Atom a, long value); /* send synthetic event to w */
-extern int xerror(Display *dsply, XErrorEvent *ee); /* dwm's X error handler */
-
-/* screen.c */
-extern void compileregs(void); /* initialize regexps of rules defined in config.h */
-extern void incnmaster(Arg *arg); /* increments nmaster with arg's index value */
-extern void initlayouts(void); /* initialize layout array */
-extern Bool isvisible(Client *c); /* returns True if client is visible */
-extern void resizemaster(Arg *arg); /* resizes the master percent with arg's index value */
-extern void restack(void); /* restores z layers of all clients */
-extern void settags(Client *c, Client *trans); /* sets tags of c */
-extern void tag(Arg *arg); /* tags c with arg's index */
-extern void toggleversatile(Arg *arg); /* toggles focusesd client between versatile/and non-versatile state */
-extern void togglelayout(Arg *arg); /* toggles layout */
-extern void toggletag(Arg *arg); /* toggles c tags with arg's index */
-extern void toggleview(Arg *arg); /* toggles the tag with arg's index (in)visible */
-extern void versatile(void); /* arranges all windows versatile */
-extern void view(Arg *arg); /* views the tag with arg's index */
-
-/* util.c */
-extern void *emallocz(unsigned int size); /* allocates zero-initialized memory, exits on error */
-extern void eprint(const char *errstr, ...); /* prints errstr and exits with 1 */
-extern void spawn(Arg *arg); /* forks a new subprocess with to arg's cmd */
-
+/* functions */
+void applyrules(Client *c);
+void arrange(void);
+void attach(Client *c);
+void attachstack(Client *c);
+void ban(Client *c);
+void buttonpress(XEvent *e);
+void checkotherwm(void);
+void cleanup(void);
+void compileregs(void);
+void configure(Client *c);
+void configurenotify(XEvent *e);
+void configurerequest(XEvent *e);
+void destroynotify(XEvent *e);
+void detach(Client *c);
+void detachstack(Client *c);
+void drawbar(void);
+void drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]);
+void drawtext(const char *text, unsigned long col[ColLast]);
+void *emallocz(unsigned int size);
+void enternotify(XEvent *e);
+void eprint(const char *errstr, ...);
+void expose(XEvent *e);
+void floating(void); /* default floating layout */
+void focus(Client *c);
+void focusnext(const char *arg);
+void focusprev(const char *arg);
+Client *getclient(Window w);
+unsigned long getcolor(const char *colstr);
+long getstate(Window w);
+Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
+void grabbuttons(Client *c, Bool focused);
+unsigned int idxoftag(const char *tag);
+void initfont(const char *fontstr);
+Bool isarrange(void (*func)());
+Bool isoccupied(unsigned int t);
+Bool isprotodel(Client *c);
+Bool isvisible(Client *c);
+void keypress(XEvent *e);
+void killclient(const char *arg);
+void leavenotify(XEvent *e);
+void manage(Window w, XWindowAttributes *wa);
+void mappingnotify(XEvent *e);
+void maprequest(XEvent *e);
+void movemouse(Client *c);
+Client *nexttiled(Client *c);
+void propertynotify(XEvent *e);
+void quit(const char *arg);
+void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
+void resizemouse(Client *c);
+void restack(void);
+void run(void);
+void scan(void);
+void setclientstate(Client *c, long state);
+void setlayout(const char *arg);
+void setmwfact(const char *arg);
+void setup(void);
+void spawn(const char *arg);
+void tag(const char *arg);
+unsigned int textnw(const char *text, unsigned int len);
+unsigned int textw(const char *text);
+void tile(void);
+void togglebar(const char *arg);
+void togglefloating(const char *arg);
+void togglemax(const char *arg);
+void toggletag(const char *arg);
+void toggleview(const char *arg);
+void unban(Client *c);
+void unmanage(Client *c);
+void unmapnotify(XEvent *e);
+void updatebarpos(void);
+void updatesizehints(Client *c);
+void updatetitle(Client *c);
+void view(const char *arg);
+void viewprevtag(const char *arg); /* views previous selected tags */
+int xerror(Display *dpy, XErrorEvent *ee);
+int xerrordummy(Display *dsply, XErrorEvent *ee);
+int xerrorstart(Display *dsply, XErrorEvent *ee);
+void zoom(const char *arg);