1 /* Part of CPP library.
2 Copyright (C) 1997, 1998, 1999, 2000 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
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 /* This header defines all the internal data structures and functions
19 that need to be visible across files. It's called cpphash.h for
20 historical reasons. */
22 #ifndef __GCC_CPPHASH__
23 #define __GCC_CPPHASH__
25 /* Test if a sign is valid within a preprocessing number. */
26 #define VALID_SIGN(c, prevc) \
27 (((c) == '+' || (c) == '-') && \
28 ((prevc) == 'e' || (prevc) == 'E' \
29 || (((prevc) == 'p' || (prevc) == 'P') \
30 && CPP_OPTION (pfile, extended_numbers))))
33 #define ALIGN(size, align) (((size) + ((align) - 1)) & ~((align) - 1))
34 #define POOL_FRONT(p) ((p)->cur->front)
35 #define POOL_LIMIT(p) ((p)->cur->limit)
36 #define POOL_BASE(p) ((p)->cur->base)
37 #define POOL_SIZE(p) ((p)->cur->limit - (p)->cur->base)
38 #define POOL_ROOM(p) ((p)->cur->limit - (p)->cur->front)
39 #define POOL_USED(p) ((p)->cur->front - (p)->cur->base)
40 #define POOL_COMMIT(p, len) do {((p)->cur->front += ALIGN (len, (p)->align));\
41 if ((p)->cur->front > (p)->cur->limit) abort ();} while (0)
43 typedef struct cpp_chunk cpp_chunk
;
52 /* List of directories to look for include files in. */
55 struct file_name_list
*next
;
56 struct file_name_list
*alloc
; /* for the cache of
57 current directory entries */
60 /* We use these to tell if the directory mentioned here is a duplicate
61 of an earlier directory on the search path. */
64 /* If the following is nonzero, it is a C-language system include
67 /* Mapping of file names for this directory.
68 Only used on MS-DOS and related platforms. */
69 struct file_name_map
*name_map
;
74 const unsigned char *cur
; /* current position */
75 const unsigned char *rlimit
; /* end of valid data */
76 const unsigned char *line_base
; /* start of current line */
77 cppchar_t read_ahead
; /* read ahead character */
78 cppchar_t extra_char
; /* extra read-ahead for long tokens. */
80 struct cpp_reader
*pfile
; /* Owns this buffer. */
81 struct cpp_buffer
*prev
;
83 const unsigned char *buf
; /* entire buffer */
85 /* Filename specified with #line command. */
86 const char *nominal_fname
;
88 /* Actual directory of this file, used only for "" includes */
89 struct file_name_list
*actual_dir
;
91 /* Pointer into the include table. Used for include_next and
92 to record control macros. */
93 struct include_file
*inc
;
95 /* Value of if_stack at start of this file.
96 Used to prohibit unmatched #endif (etc) in an include file. */
97 struct if_stack
*if_stack
;
99 /* Token column position adjustment owing to tabs in whitespace. */
100 unsigned int col_adjust
;
102 /* Line number at line_base (above). */
105 /* Because of the way the lexer works, -Wtrigraphs can sometimes
106 warn twice for the same trigraph. This helps prevent that. */
107 const unsigned char *last_Wtrigraphs
;
109 /* True if we have already warned about C++ comments in this file.
110 The warning happens only for C89 extended mode with -pedantic on,
111 or for -Wtraditional, and only once per file (otherwise it would
112 be far too noisy). */
113 unsigned char warned_cplusplus_comments
;
115 /* True if we don't process trigraphs and escaped newlines. True
116 for preprocessed input, command line directives, and _Pragma
118 unsigned char from_stage3
;
120 /* Temporary storage for pfile->skipping whilst in a directive. */
121 unsigned char was_skipping
;
123 /* 1 = system header file, 2 = C system header file used for C++. */
126 /* Nonzero means we have printed (while error reporting) a list of
127 containing files that matches the current status. */
128 unsigned char include_stack_listed
;
131 ENUM_BITFIELD (cpp_buffer_type
) type
: 8;
134 /* Character classes. Based on the more primitive macros in safe-ctype.h.
135 If the definition of `numchar' looks odd to you, please look up the
136 definition of a pp-number in the C standard [section 6.4.8 of C99].
138 In the unlikely event that characters other than \r and \n enter
139 the set is_vspace, the macro handle_newline() in cpplex.c must be
141 #define _dollar_ok(x) ((x) == '$' && CPP_OPTION (pfile, dollars_in_ident))
143 #define is_idchar(x) (ISIDNUM(x) || _dollar_ok(x))
144 #define is_numchar(x) ISIDNUM(x)
145 #define is_idstart(x) (ISIDST(x) || _dollar_ok(x))
146 #define is_numstart(x) ISDIGIT(x)
147 #define is_hspace(x) ISBLANK(x)
148 #define is_vspace(x) IS_VSPACE(x)
149 #define is_nvspace(x) IS_NVSPACE(x)
150 #define is_space(x) IS_SPACE_OR_NUL(x)
152 /* This table is constant if it can be initialized at compile time,
153 which is the case if cpp was compiled with GCC >=2.7, or another
154 compiler that supports C99. */
155 #if HAVE_DESIGNATED_INITIALIZERS
156 extern const unsigned char _cpp_trigraph_map
[UCHAR_MAX
+ 1];
158 extern unsigned char _cpp_trigraph_map
[UCHAR_MAX
+ 1];
163 #define CPP_PREV_BUFFER(BUFFER) ((BUFFER)->prev)
164 #define CPP_PRINT_DEPS(PFILE) CPP_OPTION (PFILE, print_deps)
165 #define CPP_IN_SYSTEM_HEADER(PFILE) \
166 (CPP_BUFFER (PFILE) && CPP_BUFFER (PFILE)->sysp)
167 #define CPP_PEDANTIC(PF) CPP_OPTION (PF, pedantic)
168 #define CPP_WTRADITIONAL(PF) CPP_OPTION (PF, warn_traditional)
170 /* Hash step. The hash calculation is duplicated in cpp_lookup and
172 #define HASHSTEP(r, c) ((r) * 67 + (c - 113));
175 enum error_type
{ WARNING
= 0, PEDWARN
, ERROR
, FATAL
, ICE
};
176 extern int _cpp_begin_message
PARAMS ((cpp_reader
*, enum error_type
,
177 const char *, const cpp_lexer_pos
*));
180 extern void _cpp_free_definition
PARAMS ((cpp_hashnode
*));
181 extern int _cpp_create_definition
PARAMS ((cpp_reader
*, cpp_hashnode
*));
182 extern void _cpp_pop_context
PARAMS ((cpp_reader
*));
183 extern void _cpp_free_lookaheads
PARAMS ((cpp_reader
*));
184 extern void _cpp_release_lookahead
PARAMS ((cpp_reader
*));
185 extern void _cpp_push_token
PARAMS ((cpp_reader
*, const cpp_token
*,
186 const cpp_lexer_pos
*));
189 extern void _cpp_init_hashtable
PARAMS ((cpp_reader
*));
190 extern void _cpp_cleanup_hashtable
PARAMS ((cpp_reader
*));
191 extern cpp_hashnode
*_cpp_lookup_with_hash
PARAMS ((cpp_reader
*, size_t,
195 extern void _cpp_never_reread
PARAMS ((struct include_file
*));
196 extern void _cpp_simplify_pathname
PARAMS ((char *));
197 extern int _cpp_read_file
PARAMS ((cpp_reader
*, const char *));
198 extern void _cpp_execute_include
PARAMS ((cpp_reader
*,
199 const cpp_token
*, int, int));
200 extern int _cpp_compare_file_date
PARAMS ((cpp_reader
*,
202 extern void _cpp_report_missing_guards
PARAMS ((cpp_reader
*));
203 extern void _cpp_init_includes
PARAMS ((cpp_reader
*));
204 extern void _cpp_cleanup_includes
PARAMS ((cpp_reader
*));
205 extern void _cpp_pop_file_buffer
PARAMS ((cpp_reader
*, cpp_buffer
*));
208 extern int _cpp_parse_expr
PARAMS ((cpp_reader
*));
211 extern void _cpp_lex_token
PARAMS ((cpp_reader
*, cpp_token
*));
212 extern int _cpp_equiv_tokens
PARAMS ((const cpp_token
*,
214 extern void _cpp_init_pool
PARAMS ((cpp_pool
*, unsigned int,
215 unsigned int, unsigned int));
216 extern void _cpp_free_pool
PARAMS ((cpp_pool
*));
217 extern unsigned char *_cpp_pool_reserve
PARAMS ((cpp_pool
*, unsigned int));
218 extern unsigned char *_cpp_pool_alloc
PARAMS ((cpp_pool
*, unsigned int));
219 extern unsigned char *_cpp_next_chunk
PARAMS ((cpp_pool
*, unsigned int,
221 extern void _cpp_lock_pool
PARAMS ((cpp_pool
*));
222 extern void _cpp_unlock_pool
PARAMS ((cpp_pool
*));
225 extern int _cpp_test_assertion
PARAMS ((cpp_reader
*, int *));
226 extern int _cpp_handle_directive
PARAMS ((cpp_reader
*, int));
227 extern void _cpp_define_builtin
PARAMS ((cpp_reader
*, const char *));
228 extern void _cpp_do__Pragma
PARAMS ((cpp_reader
*));
229 extern void _cpp_init_stacks
PARAMS ((cpp_reader
*));
230 extern void _cpp_cleanup_stacks
PARAMS ((cpp_reader
*));
231 extern void _cpp_init_internal_pragmas
PARAMS ((cpp_reader
*));
232 extern void _cpp_do_file_change
PARAMS ((cpp_reader
*, enum cpp_fc_reason
,
233 const char *, unsigned int));
235 /* Utility routines and macros. */
236 #define DSC(str) (const U_CHAR *)str, sizeof str - 1
237 #define xnew(T) (T *) xmalloc (sizeof(T))
238 #define xcnew(T) (T *) xcalloc (1, sizeof(T))
239 #define xnewvec(T, N) (T *) xmalloc (sizeof(T) * (N))
240 #define xcnewvec(T, N) (T *) xcalloc (N, sizeof(T))
241 #define xobnew(O, T) (T *) obstack_alloc (O, sizeof(T))