text: #include <stdio.h>
  #include <stdarg.h>
  #include "_stdio.h"
  
  int snprintf(char * restrict s, size_t n, const char * restrict format, ...)
  {
  	int ret = 0;
  	va_list ap;
  	struct io_options opt = {0};
  	opt.fnname = __func__;
  	opt.string = s;
  	opt.maxlen = n;
  	va_start(ap, format);
  	ret = __printf(&opt, format, ap);
  	va_end(ap);
  	return ret;
  }
  
  /*
  STDC(199901)
  */
  