ANTLR3_BITSET_LOG_BITS (3) Linux Manual Page
include/antlr3bitset.h –
Defines the basic structures of an ANTLR3 bitset.
Synopsis
#include <antlr3defs.h>#include <antlr3collections.h>
Data Structures
struct ANTLR3_BITSET_LIST_structstruct ANTLR3_BITSET_struct
Defines
#define ANTLR3_BITSET_BITS 64How many bits in the elements.
#define ANTLR3_BITSET_LOG_BITS 6
log2 of ANTLR3_BITSET_BITS 2^ANTLR3_BITSET_LOG_BITS = ANTLR3_BITSET_BITS
#define ANTLR3_BITSET_MOD_MASK ANTLR3_BITSET_BITS – 1
We will often need to do a mod operator (i mod nbits).
#define ANTLR3_BITSET_NIBBLE 4
How many bits in a nible of bits.
Typedefs
typedef struct ANTLR3_BITSET_struct ANTLR3_BITSETtypedef struct ANTLR3_BITSET_LIST_struct ANTLR3_BITSET_LIST
Detailed Description
Defines the basic structures of an ANTLR3 bitset. this is a C version of the cut down Bitset class provided with the java version of antlr 3.
Define Documentation
#define ANTLR3_BITSET_BITS 64
How many bits in the elements. Referenced by antlr3BitsetClone(), antlr3BitsetNew(), and antlr3BitsetSize().
#define ANTLR3_BITSET_LOG_BITS 6
log2 of ANTLR3_BITSET_BITS 2^ANTLR3_BITSET_LOG_BITS = ANTLR3_BITSET_BITS Referenced by antlr3BitsetNew(), antlr3BitsetNumBits(), numWordsToHold(), and wordNumber().
#define ANTLR3_BITSET_MOD_MASK ANTLR3_BITSET_BITS – 1
We will often need to do a mod operator (i mod nbits). For powers of two, this mod operation is the same as:- *
- (i & (nbits-1)).
Since mod is relatively slow, we use an easily precomputed mod mask to do the mod instead.
Referenced by bitMask().