/* Renders SRC, which contains SRC_SIZE bytes of a floating-point
number in the given FORMAT, as relatively human-readable
null-terminated string in the DST_SIZE bytes in DST. DST_SIZE
/* Renders SRC, which contains SRC_SIZE bytes of a floating-point
number in the given FORMAT, as relatively human-readable
null-terminated string in the DST_SIZE bytes in DST. DST_SIZE