major stdio overhaul, using readv/writev, plus other changes

[musl] / src / stdio / __toread.c

#include <stdio_impl.h>

int __toread(FILE *f)
{
        f->mode |= f->mode-1;
        if (f->wpos > f->buf) f->write(f, 0, 0);
        f->wpos = f->wbase = f->wend = 0;
        if (f->flags & (F_EOF|F_NORD)) {
                if (f->flags & F_NORD) f->flags |= F_ERR;
                return EOF;
        }
        f->rpos = f->rend = f->buf;
        return 0;
}