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106 lines
3.5 KiB
C
106 lines
3.5 KiB
C
#ifndef ACL_BITS_MAP_INCLUDE_H
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#define ACL_BITS_MAP_INCLUDE_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "acl_define.h"
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/**
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* 位映射结构类型定义
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*/
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typedef struct ACL_BITS_MASK {
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char *data; /**< bit mask */
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size_t data_len; /**< data byte count */
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} ACL_BITS_MASK;
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/**
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* Bits per byte, byte in vector, bit offset in byte, bytes perset
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*/
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#define ACL_BITS_MASK_NBBY (8)
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#define ACL_BITS_MASK_FD_BYTE(number, mask) \
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(((unsigned char *) (mask)->data)[(number) / ACL_BITS_MASK_NBBY])
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#define ACL_BITS_MASK_FD_BIT(number) (1 << ((number) % ACL_BITS_MASK_NBBY))
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#define ACL_BITS_MASK_BYTES_NEEDED(len) \
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(size_t) (((acl_int64) (len) + (ACL_BITS_MASK_NBBY - 1)) / ACL_BITS_MASK_NBBY)
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#define ACL_BITS_MASK_BYTE_COUNT(mask) ((mask)->data_len)
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/* Memory management. */
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/**
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* 分配位映射对象空间
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* @param mask {ACL_BITS_MASK*) ACL_BITS_MASK 指针
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* @param nmax {size_t/unsigned int/unsigned short/unsigned char} 最大值，以此值来
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* 计算 (mask)->data 占的内存空间大小，如：当 nmax=4294967295, 即最大整数值时，则
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* (mask)->data_len=536870912, 即 (mask)->data 占用 536870912 Bytes; 当 nmax=65535,
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* 即最大 unsigned short 值时，则 (mask)->data_len=8192, 即 (mask)->data 占用 8192 字节
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*/
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#define ACL_BITS_MASK_ALLOC(mask, nmax) do { \
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size_t _byte_len = ACL_BITS_MASK_BYTES_NEEDED(nmax); \
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(mask)->data = (char*) acl_mymalloc(_byte_len); \
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memset((mask)->data, 0, _byte_len); \
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(mask)->data_len = _byte_len; \
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} while (0)
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/**
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* 重分配位映射对象空间
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* @param mask {ACL_BITS_MASK*) ACL_BITS_MASK 指针
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* @param nmax {size_t/unsigned int/unsigned short/unsigned char} 最大值，以此值来
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* 计算 (mask)->data 占的内存空间大小，如：当 nmax=4294967295, 即最大整数值时，则
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* (mask)->data_len=536870912, 即 (mask)->data 占用 536870912 Bytes; 当 nmax=65535,
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* 即最大 unsigned short 值时，则 (mask)->data_len=8192, 即 (mask)->data 占用 8192 字节
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*/
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#define ACL_BITS_MASK_REALLOC(mask, nmax) do { \
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size_t _byte_len = ACL_BITS_MASK_BYTES_NEEDED(nmax); \
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size_t _old_len = (mask)->data_len; \
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(mask)->data = (char*) acl_myrealloc((mask)->data, _byte_len); \
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memset((mask)->data + _old_len, 0, _byte_len - _old_len); \
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(mask)->data_len = _byte_len; \
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} while (0)
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/**
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* 释放位映射对象的内部动态空间
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* @param mask {ACL_BITS_MASK*) ACL_BITS_MASK 指针
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*/
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#define ACL_BITS_MASK_FREE(mask) acl_myfree((mask)->data)
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/* Set operations, modeled after FD_ZERO/SET/ISSET/CLR. */
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/**
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* 将位映射对象的内部动态空间清零
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* @param mask {ACL_BITS_MASK*) ACL_BITS_MASK 指针
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*/
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#define ACL_BITS_MASK_ZERO(mask) \
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memset((mask)->data, 0, (mask)->data_len);
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/**
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* 将整数映射为位存储在位映射对象的动态空间中
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* @param number {unsigned int} 整数值
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* @param mask {ACL_BITS_MASK*) ACL_BITS_MASK 指针
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*/
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#define ACL_BITS_MASK_SET(number, mask) \
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(ACL_BITS_MASK_FD_BYTE((number), (mask)) |= ACL_BITS_MASK_FD_BIT(number))
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/**
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* 判断某个整数是否存储在位映射对象的动态空间中
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* @param number {unsigned int} 整数值
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* @param mask {ACL_BITS_MASK*) ACL_BITS_MASK 指针
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* @return {int} 0: 不存在；!= 0: 存在
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*/
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#define ACL_BITS_MASK_ISSET(number, mask) \
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(ACL_BITS_MASK_FD_BYTE((number), (mask)) & ACL_BITS_MASK_FD_BIT(number))
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/**
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* 将某个整数从位映射对象的动态空间中清除掉
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* @param number {unsigned int} 整数值
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* @param mask {ACL_BITS_MASK*) ACL_BITS_MASK 指针
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*/
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#define ACL_BITS_MASK_CLR(number, mask) \
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(ACL_BITS_MASK_FD_BYTE((number), (mask)) &= ~ACL_BITS_MASK_FD_BIT(number))
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#ifdef __cplusplus
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}
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#endif
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#endif
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