Subversion Repositories planix.SVN

#include <u.h>
#include <libc.h>
#include "fmtdef.h"

/*
 * generic routine for flushing a formatting buffer
 * to a file descriptor
 */
int
_fmtFdFlush(Fmt *f)
{
        int n;

        n = (char*)f->to - (char*)f->start;
        if(n && write((int)(uintptr)f->farg, f->start, n) != n)
                return 0;
        f->to = f->start;
        return 1;
}

int
vfprint(int fd, char *fmt, va_list args)
{
        Fmt f;
        char buf[256];
        int n;

        fmtfdinit(&f, fd, buf, sizeof(buf));
        f.args = args;
        n = dofmt(&f, fmt);
        if(n > 0 && _fmtFdFlush(&f) == 0)
                return -1;
        return n;
}