/* Convert a UTF-8 string into a UCS-2 array. */void tcstrutftoucs(const char *str, uint16_t *ary, int *np){  assert(str && ary && np);  const unsigned char *rp = (unsigned char *)str;  unsigned int wi = 0;  while(*rp != ‘\0‘){    int c = *(unsigned char *)rp;    if(c < 0x80){      ary[wi++] = c;    } else if(c < 0xe0){      if(rp[1] >= 0x80){        ary[wi++] = ((rp[0] & 0x1f) << 6) | (rp[1] & 0x3f);        rp++;      }    } else if(c < 0xf0){      if(rp[1] >= 0x80 && rp[2] >= 0x80){        ary[wi++] = ((rp[0] & 0xf) << 12) | ((rp[1] & 0x3f) << 6) | (rp[2] & 0x3f);        rp += 2;      }    }    rp++;  }  *np = wi;}/* Convert a UCS-2 array into a UTF-8 string. */int tcstrucstoutf(const uint16_t *ary, int num, char *str){  assert(ary && num >= 0 && str);  unsigned char *wp = (unsigned char *)str;  for(int i = 0; i < num; i++){    unsigned int c = ary[i];    if(c < 0x80){      *(wp++) = c;    } else if(c < 0x800){      *(wp++) = 0xc0 | (c >> 6);      *(wp++) = 0x80 | (c & 0x3f);    } else {      *(wp++) = 0xe0 | (c >> 12);      *(wp++) = 0x80 | ((c & 0xfff) >> 6);      *(wp++) = 0x80 | (c & 0x3f);    }  }  *wp = ‘\0‘;  return (char *)wp - str;}