ref: 403584715f06a7bd72f8c350fa4100468f2e8bb4
dir: /sys/src/libbio/bputc.c/
#include <u.h>
#include <libc.h>
#include <bio.h>
int
Bputc(Biobufhdr *bp, int c)
{
int i;
for(;;) {
i = bp->ocount;
if(i) {
bp->ebuf[i++] = c;
bp->ocount = i;
return 0;
}
if(Bflush(bp) == Beof)
break;
}
return Beof;
}