Vim t_xx option snippet

t_xx.c

#include <stdlib.h>
#include <stdio.h>

#define TERMCAP2KEY(a, b) (-((a) + ((int)(b) << 8)))
#define KEY2TERMCAP0(x) ((-(x)) & 0xff)
#define KEY2TERMCAP1(x) (((unsigned)(-(x)) >> 8) & 0xff)

int main(int argc, char **argv) {
  int t_vi = TERMCAP2KEY('v', 'i');
  unsigned int keyname[2] = { 0 };
  keyname[0] = KEY2TERMCAP0(t_vi);
  keyname[1] = KEY2TERMCAP1(t_vi);
  printf("t_vi=%d keyname0=%d keyname1=%d\n", t_vi, keyname[0], keyname[1]);
}