text: /* See LICENSE for license details. */
  
  #include <stdint.h>
  #include <sys/types.h>
  
  /* macros */
  #define MIN(a, b)		((a) < (b) ? (a) : (b))
  #define MAX(a, b)		((a) < (b) ? (b) : (a))
  #define LEN(a)			(sizeof(a) / sizeof(a)[0])
  #define BETWEEN(x, a, b)	((a) <= (x) && (x) <= (b))
  #define DIVCEIL(n, d)		(((n) + ((d) - 1)) / (d))
  #define DEFAULT(a, b)		(a) = (a) ? (a) : (b)
  #define LIMIT(x, a, b)		(x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
  #define ATTRCMP(a, b)		((a).mode != (b).mode || (a).fg != (b).fg || \
  				(a).bg != (b).bg)
  #define TIMEDIFF(t1, t2)	((t1.tv_sec-t2.tv_sec)*1000 + \
  				(t1.tv_nsec-t2.tv_nsec)/1E6)
  #define MODBIT(x, set, bit)	((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
  
  #define TRUECOLOR(r,g,b)	(1 << 24 | (r) << 16 | (g) << 8 | (b))
  #define IS_TRUECOL(x)		(1 << 24 & (x))
  
  enum glyph_attribute {
  	ATTR_NULL       = 0,
  	ATTR_BOLD       = 1 << 0,
  	ATTR_FAINT      = 1 << 1,
  	ATTR_ITALIC     = 1 << 2,
  	ATTR_UNDERLINE  = 1 << 3,
  	ATTR_BLINK      = 1 << 4,
  	ATTR_REVERSE    = 1 << 5,
  	ATTR_INVISIBLE  = 1 << 6,
  	ATTR_STRUCK     = 1 << 7,
  	ATTR_WRAP       = 1 << 8,
  	ATTR_WIDE       = 1 << 9,
  	ATTR_WDUMMY     = 1 << 10,
  	ATTR_BOLD_FAINT = ATTR_BOLD | ATTR_FAINT,
  };
  
  enum selection_mode {
  	SEL_IDLE = 0,
  	SEL_EMPTY = 1,
  	SEL_READY = 2
  };
  
  enum selection_type {
  	SEL_REGULAR = 1,
  	SEL_RECTANGULAR = 2
  };
  
  enum selection_snap {
  	SNAP_WORD = 1,
  	SNAP_LINE = 2
  };
  
  typedef unsigned char uchar;
  typedef unsigned int uint;
  typedef unsigned long ulong;
  typedef unsigned short ushort;
  
  typedef uint_least32_t Rune;
  
  #define Glyph Glyph_
  typedef struct {
  	Rune u;           /* character code */
  	ushort mode;      /* attribute flags */
  	uint32_t fg;      /* foreground  */
  	uint32_t bg;      /* background  */
  } Glyph;
  
  typedef Glyph *Line;
  
  typedef union {
  	int i;
  	uint ui;
  	float f;
  	const void *v;
  	const char *s;
  } Arg;
  
  void die(const char *, ...);
  void redraw(void);
  void draw(void);
  
  void newterm(const Arg *);
  void kscrolldown(const Arg *);
  void kscrollup(const Arg *);
  void printscreen(const Arg *);
  void printsel(const Arg *);
  void sendbreak(const Arg *);
  void toggleprinter(const Arg *);
  
  int tattrset(int);
  void tnew(int, int);
  void tresize(int, int);
  void tsetdirtattr(int);
  void ttyhangup(void);
  int ttynew(char *, char *, char *, char **);
  size_t ttyread(void);
  void ttyresize(int, int);
  void ttywrite(const char *, size_t, int);
  
  void resettitle(void);
  
  void selclear(void);
  void selinit(void);
  void selstart(int, int, int);
  void selextend(int, int, int, int);
  int selected(int, int);
  char *getsel(void);
  
  size_t utf8encode(Rune, char *);
  
  void *xmalloc(size_t);
  void *xrealloc(void *, size_t);
  char *xstrdup(char *);
  
  /* config.h globals */
  extern char *utmp;
  extern char *stty_args;
  extern char *vtiden;
  extern wchar_t *worddelimiters;
  extern int allowaltscreen;
  extern char *termname;
  extern unsigned int tabspaces;
  extern unsigned int defaultfg;
  extern unsigned int defaultbg;
  extern float alpha;
  extern float alphaUnfocussed;
  