* decl.c (grokfndecl): Remove dead code.
[official-gcc.git] / gcc / cpphash.h
blob5422979c152f7094c6b85febc233111eb5e30b03
1 /* Part of CPP library. (Macro hash table support.)
2 Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify it
5 under the terms of the GNU General Public License as published by the
6 Free Software Foundation; either version 2, or (at your option) any
7 later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
18 /* different kinds of things that can appear in the value field
19 of a hash node. */
20 union hashval
22 const char *cpval; /* some predefined macros */
23 DEFINITION *defn; /* #define */
24 struct hashnode *aschain; /* #assert */
27 struct hashnode {
28 struct hashnode *next; /* double links for easy deletion */
29 struct hashnode *prev;
30 struct hashnode **bucket_hdr; /* also, a back pointer to this node's hash
31 chain is kept, in case the node is the head
32 of the chain and gets deleted. */
33 enum node_type type; /* type of special token */
34 int length; /* length of token, for quick comparison */
35 U_CHAR *name; /* the actual name */
36 union hashval value; /* pointer to expansion, or whatever */
39 typedef struct hashnode HASHNODE;
41 /* Some definitions for the hash table. The hash function MUST be
42 computed as shown in hashf () below. That is because the rescan
43 loop computes the hash value `on the fly' for most tokens,
44 in order to avoid the overhead of a lot of procedure calls to
45 the hashf () function. Hashf () only exists for the sake of
46 politeness, for use when speed isn't so important. */
48 #define HASHSTEP(old, c) ((old << 2) + c)
49 #define MAKE_POS(v) (v & 0x7fffffff) /* make number positive */
51 extern HASHNODE *cpp_install PARAMS ((cpp_reader *, const U_CHAR *, int,
52 enum node_type, const char *, int));
53 extern int hashf PARAMS ((const U_CHAR *, int, int));
54 extern void delete_macro PARAMS ((HASHNODE *));
56 extern MACRODEF create_definition PARAMS ((U_CHAR *, U_CHAR *,
57 cpp_reader *, int));
58 extern int compare_defs PARAMS ((cpp_reader *, DEFINITION *,
59 DEFINITION *));
60 extern void macroexpand PARAMS ((cpp_reader *, HASHNODE *));
61 extern void dump_definition PARAMS ((cpp_reader *, MACRODEF));