#include <u.h>#include <libc.h>#include "fmtdef.h" /* * public routine for final flush of a formatting buffer * to a file descriptor; returns total char count. */intfmtfdflush(Fmt *f){	if(_fmtFdFlush(f) <= 0)		return -1;	return f->nfmt;} /* * initialize an output buffer for buffered printing */intfmtfdinit(Fmt *f, int fd, char *buf, int size){	f->runes = 0;	f->start = buf;	f->to = buf;	f->stop = buf + size;	f->flush = _fmtFdFlush;	f->farg = (void*)fd;	f->nfmt = 0;	return 0;}