// shouldquit.c
extern int shouldQuit(void);

// areaevents.c
typedef struct clickCounter clickCounter;
// you should call Reset() to zero-initialize a new instance
// it doesn't matter that all the non-count fields are zero: the first click will fail the curButton test straightaway, so it'll return 1 and set the rest of the structure accordingly
struct clickCounter {
	int curButton;
	int rectX0;
	int rectY0;
	int rectX1;
	int rectY1;
	uintptr_t prevTime;
	int count;
};
int clickCounterClick(clickCounter *c, int button, int x, int y, uintptr_t time, uintptr_t maxTime, int32_t xdist, int32_t ydist);
extern void clickCounterReset(clickCounter *);
extern int fromScancode(uintptr_t, uiAreaKeyEvent *);

// matrix.c
extern void fallbackSkew(uiDrawMatrix *, double, double, double, double);
extern void scaleCenter(double, double, double *, double *);
extern void fallbackTransformSize(uiDrawMatrix *, double *, double *);

// OS-specific text.* files
extern int uiprivStricmp(const char *a, const char *b);