1 #include <u.h> 2 #include <libc.h> 3 #include <bio.h> 4 5 static int fmtBflush(Fmt * f)6fmtBflush(Fmt *f) 7 { 8 Biobufhdr *bp; 9 10 bp = f->farg; 11 bp->ocount = (char*)f->to - (char*)f->stop; 12 if(Bflush(bp) < 0) 13 return 0; 14 f->stop = bp->ebuf; 15 f->to = (char*)f->stop + bp->ocount; 16 f->start = f->to; 17 return 1; 18 } 19 20 int Bvprint(Biobufhdr * bp,char * fmt,va_list arg)21Bvprint(Biobufhdr *bp, char *fmt, va_list arg) 22 { 23 int n; 24 Fmt f; 25 26 f.runes = 0; 27 f.stop = bp->ebuf; 28 f.start = (char*)f.stop + bp->ocount; 29 f.to = f.start; 30 f.flush = fmtBflush; 31 f.farg = bp; 32 f.nfmt = 0; 33 f.args = arg; 34 n = dofmt(&f, fmt); 35 bp->ocount = (char*)f.to - (char*)f.stop; 36 return n; 37 } 38