acl/lib_acl_cpp/include/acl_cpp/stdlib/bitmap.hpp

#pragma once

namespace acl {

/**
 * @author wanghaibin@qiyi.com
 * @date   2017-08-16
 */

class bitmap
{
public:
	/**
	 * <EFBFBD><EFBFBD><EFBFBD>캯<EFBFBD><EFBFBD>
	 * @param buf {const void*} Դ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>λӳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 * @param len {size_} buf λӳ<EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>б<EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 */
	bitmap(const void* buf, size_t len);

	/**
	 * <EFBFBD><EFBFBD><EFBFBD>캯<EFBFBD><EFBFBD>
	 * @param len {size_t} <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɵ<EFBFBD>λӳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 */
	bitmap(size_t len);

	~bitmap();

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵӳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 * @param n {size_t}
	 * @return {bool} <EFBFBD><EFBFBD><EFBFBD><EFBFBD> true <EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD>ӳɹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD>ֵԽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 */
	bool set(size_t n);

	/**
	 * <EFBFBD>ж<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>λӳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 * @param n {size_t}
	 * @return {bool} <EFBFBD>ж<EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>λӳ<EFBFBD>伯<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 */
	bool isset(size_t n);

	/**
	 * <EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȥ<EFBFBD><EFBFBD>
	 * @param n {size_t}
	 * @return {bool} <EFBFBD><EFBFBD><EFBFBD><EFBFBD> false <EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD>ֵԽ<EFBFBD><EFBFBD><EFBFBD>򲻴<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 */
	bool unset(size_t n);

	/**
	 * <EFBFBD><EFBFBD>bitmap<EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>buf<EFBFBD><EFBFBD>
	 * @param buf {void*}<EFBFBD><EFBFBD><EFBFBD>ſ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 * @param len {size_t} buf<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>󳤶<EFBFBD>
	 * @return {size_t} <EFBFBD><EFBFBD><EFBFBD>سɹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ泤<EFBFBD>ȣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 0 <EFBFBD><EFBFBD>ʾ buf ̫С
	 */
	size_t tobuf(void* buf, size_t len);

	/**
	 * <EFBFBD><EFBFBD>buf<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD>ǰbitmap<EFBFBD><EFBFBD>Ϣ
	 * @param buf {const void*} Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>bitmap<EFBFBD><EFBFBD>Ϣ
	 * @param len {size_t} buf<EFBFBD>ij<EFBFBD><EFBFBD><EFBFBD>
	 * @return true <EFBFBD>ɹ<EFBFBD><EFBFBD><EFBFBD>falseʧ<EFBFBD><EFBFBD>
	 */
	bool frombuf(const void* buf, size_t len);

	/**
	 * <EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD>ǰ<EFBFBD><EFBFBD>bitmapΪ 0
	 */
	void reset(void);

	/**
	 * <EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD>ǰλӳ<EFBFBD><EFBFBD><EFBFBD>洢<EFBFBD>ռ<EFBFBD><EFBFBD>Ĵ<EFBFBD>С
	 * @return {size_t}
	 */
	size_t size(void);

	/**
	 * <EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD>ǰ<EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>õĸ<EFBFBD><EFBFBD><EFBFBD>
	 * @return {size_t}
	 */
	size_t count(void);

	/**
	 * <EFBFBD><EFBFBD>ǰbitmap<EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 * @return {bool}
	 */
	bool full(void);

private:
	unsigned char *bmp_;
	size_t size_;
	size_t count_;

	//<2F><><EFBFBD><EFBFBD>ͳ<EFBFBD><CDB3>count<6E><74><EFBFBD><EFBFBD>
	void recount(void);
};

} // namespace acl