注意，因为这段代码只处理缓冲区，所以除了大写转换特有的函数调用之外几乎没有特殊代码。

Note that since this code only deals with buffers, there is almost no code except the function call which is specific to uppercase-conversion.

youdao

对于实际的缓冲区处理，函数只需直接返回，就能够很好地处理大小为零的缓冲区。

For the actual buffer processing, the function is perfectly capable of handling zero-sized buffers by simply returning.

youdao

一旦字符串处理函数失败，就把目标缓冲区设成NULL。

You want to set the target buffer to NULL on failure.

youdao

一旦字符串处理函数失败，就把目标缓冲区设成NULL。

You want to set the target buffer to NULL on failure.

youdao