NAME

include/antlr3bitset.h -

Defines the basic structures of an ANTLR3 bitset.

SYNOPSIS


#include <antlr3defs.h>
#include <antlr3collections.h>

Data Structures


struct ANTLR3_BITSET_LIST_struct

struct ANTLR3_BITSET_struct

Defines


#define ANTLR3_BITSET_BITS 64
How 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_BITSET

typedef 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().

#define ANTLR3_BITSET_NIBBLE 4

How many bits in a nible of bits.

Typedef Documentation

typedef struct ANTLR3_BITSET_struct


  ANTLR3_BITSET"

typedef struct ANTLR3_BITSET_LIST_struct

        ANTLR3_BITSET_LIST"

Author

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