puffs_framebuf_remaining
size_t puffs_framebuf_remaining(struct puffs_framebuf *);
if (puffs_framebuf_remaining(pb) < len)
if (puffs_framebuf_remaining(pb) < size)
if (puffs_framebuf_remaining(pb) < 1+4+8)
if (puffs_framebuf_remaining(pb) < len)