a2a76ce71b
* cpphash.c: Fix formatting, update commentary. (dump_definition): Take three separate arguments instead of a MACRODEF structure argument. * cpphash.h: Update prototype of dump_definition. * cppinit.c (cpp_finish): Update call of dump_definition. * cpplib.c (do_define): Always create new hash entry with T_MACRO type. Remove redundant check for redefinition of poisoned identifier. Update call of dump_definition. (do_undef): Don't call check_macro_name. Rename sym_length to len. (do_error, do_warning): Don't use copy_rest_of_line or SKIP_WHITE_SPACE. (do_warning): Don't use pedwarn for the actual warning, only the notice about its not being in the standard. (Fixes bug with #warning in system headers.) (do_ident): Stricter argument checking - accept only a single string after #ident. Also, macro-expand the line. (do_xifdef): Use cpp_defined. De-obfuscate. (do_pragma): Split out specific pragma handling to separate functions. Use get_directive_token. Update commentary. Do not pass on #pragma once or #pragma poison to the front end. (do_pragma_once, do_pragma_implementation, do_pragma_poison, do_pragma_default): New. From-SVN: r31931
114 lines
4.4 KiB
C
114 lines
4.4 KiB
C
/* Part of CPP library. (Macro hash table support.)
|
|
Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
|
|
|
|
This program is free software; you can redistribute it and/or modify it
|
|
under the terms of the GNU General Public License as published by the
|
|
Free Software Foundation; either version 2, or (at your option) any
|
|
later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
|
|
|
#ifndef __GCC_CPPHASH__
|
|
#define __GCC_CPPHASH__
|
|
|
|
/* Structure returned by create_definition */
|
|
typedef struct macrodef MACRODEF;
|
|
struct macrodef
|
|
{
|
|
struct definition *defn;
|
|
const U_CHAR *symnam;
|
|
int symlen;
|
|
};
|
|
|
|
/* Structure allocated for every #define. For a simple replacement
|
|
such as
|
|
#define foo bar ,
|
|
nargs = -1, the `pattern' list is null, and the expansion is just
|
|
the replacement text. Nargs = 0 means a functionlike macro with no args,
|
|
e.g.,
|
|
#define getchar() getc (stdin) .
|
|
When there are args, the expansion is the replacement text with the
|
|
args squashed out, and the reflist is a list describing how to
|
|
build the output from the input: e.g., "3 chars, then the 1st arg,
|
|
then 9 chars, then the 3rd arg, then 0 chars, then the 2nd arg".
|
|
The chars here come from the expansion. Whatever is left of the
|
|
expansion after the last arg-occurrence is copied after that arg.
|
|
Note that the reflist can be arbitrarily long---
|
|
its length depends on the number of times the arguments appear in
|
|
the replacement text, not how many args there are. Example:
|
|
#define f(x) x+x+x+x+x+x+x would have replacement text "++++++" and
|
|
pattern list
|
|
{ (0, 1), (1, 1), (1, 1), ..., (1, 1), NULL }
|
|
where (x, y) means (nchars, argno). */
|
|
|
|
typedef struct definition DEFINITION;
|
|
struct definition {
|
|
int nargs;
|
|
int length; /* length of expansion string */
|
|
unsigned char *expansion;
|
|
int line; /* Line number of definition */
|
|
const char *file; /* File of definition */
|
|
char rest_args; /* Nonzero if last arg. absorbs the rest */
|
|
struct reflist {
|
|
struct reflist *next;
|
|
char stringify; /* nonzero if this arg was preceded by a
|
|
# operator. */
|
|
char raw_before; /* Nonzero if a ## operator before arg. */
|
|
char raw_after; /* Nonzero if a ## operator after arg. */
|
|
char rest_args; /* Nonzero if this arg. absorbs the rest */
|
|
int nchars; /* Number of literal chars to copy before
|
|
this arg occurrence. */
|
|
int argno; /* Number of arg to substitute (origin-0) */
|
|
} *pattern;
|
|
/* Names of macro args, concatenated in reverse order
|
|
with comma-space between them.
|
|
The only use of this is that we warn on redefinition
|
|
if this differs between the old and new definitions. */
|
|
unsigned char *argnames;
|
|
};
|
|
|
|
/* different kinds of things that can appear in the value field
|
|
of a hash node. */
|
|
union hashval
|
|
{
|
|
const char *cpval; /* some predefined macros */
|
|
DEFINITION *defn; /* #define */
|
|
struct hashnode *aschain; /* #assert */
|
|
};
|
|
|
|
typedef struct hashnode HASHNODE;
|
|
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 */
|
|
};
|
|
|
|
extern HASHNODE *cpp_install PARAMS ((cpp_reader *, const U_CHAR *, int,
|
|
enum node_type, const char *));
|
|
extern HASHNODE *cpp_lookup PARAMS ((cpp_reader *, const U_CHAR *, int));
|
|
extern void free_definition PARAMS ((DEFINITION *));
|
|
extern void delete_macro PARAMS ((HASHNODE *));
|
|
|
|
extern MACRODEF create_definition PARAMS ((U_CHAR *, U_CHAR *,
|
|
cpp_reader *));
|
|
extern int compare_defs PARAMS ((cpp_reader *, DEFINITION *,
|
|
DEFINITION *));
|
|
extern void macroexpand PARAMS ((cpp_reader *, HASHNODE *));
|
|
extern void dump_definition PARAMS ((cpp_reader *, const U_CHAR *, long,
|
|
DEFINITION *));
|
|
|
|
#endif
|