字符缓冲。
Gets a reference to the character buffer of a string.
获取对字符串的字符缓冲区的引用。
This class implements a character buffer that can be used as an Writer.
该类实现了一个字符缓冲，可以作为Writer使用。
You want to fill the empty buffer space with a specific character.
以某个特定字符填充空闲缓冲区。
The index position of the character in the input buffer.
该字符在输入缓冲区中的索引位置。
The index of the next character to read from the input stream buffer.
要从输入流缓冲读取的下一个字符的下标。
The character which when preceded by an escape character represents end of buffer operator.
前跟转义字符用于标识缓冲区操作符结束的字符。
CE_TXFULL the application tried to transmit a character, but the output buffer was full.
应用程序尝试发送一个字符，但是发送缓冲区已经满了。
CE_TXFULL the application tried to transmit a character, but the output buffer was full.
应用程序尝试发送一个字符，但是发送缓冲区已经满了。
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