mirror of
https://github.com/pmret/gcc-papermario.git
synced 2024-11-09 12:22:38 +01:00
39 lines
1.3 KiB
C
39 lines
1.3 KiB
C
/* different kinds of things that can appear in the value field
|
|
of a hash node. Actually, this may be useless now. */
|
|
union hashval {
|
|
int ival;
|
|
char *cpval;
|
|
DEFINITION *defn;
|
|
#if 0
|
|
KEYDEF *keydef;
|
|
#endif
|
|
};
|
|
|
|
struct hashnode {
|
|
struct hashnode *next; /* double links for easy deletion */
|
|
struct hashnode *prev;
|
|
struct hashnode **bucket_hdr; /* also, a back pointer to this node's hash
|
|
chain is kept, in case the node is the head
|
|
of the chain and gets deleted. */
|
|
enum node_type type; /* type of special token */
|
|
int length; /* length of token, for quick comparison */
|
|
U_CHAR *name; /* the actual name */
|
|
union hashval value; /* pointer to expansion, or whatever */
|
|
};
|
|
|
|
typedef struct hashnode HASHNODE;
|
|
|
|
/* Some definitions for the hash table. The hash function MUST be
|
|
computed as shown in hashf () below. That is because the rescan
|
|
loop computes the hash value `on the fly' for most tokens,
|
|
in order to avoid the overhead of a lot of procedure calls to
|
|
the hashf () function. Hashf () only exists for the sake of
|
|
politeness, for use when speed isn't so important. */
|
|
|
|
#define HASHSIZE 1403
|
|
static HASHNODE *hashtab[HASHSIZE];
|
|
#define HASHSTEP(old, c) ((old << 2) + c)
|
|
#define MAKE_POS(v) (v & 0x7fffffff) /* make number positive */
|
|
|
|
extern HASHNODE *install PARAMS ((U_CHAR *,int,enum node_type, int,char *,int));
|