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 typedef unsigned char U_CHAR;
27 /* The structure of a node in the hash table. The hash table
28 has entries for all tokens defined by #define commands (type T_MACRO),
29 plus some special tokens like __LINE__ (these each have their own
30 type, and the appropriate code is run when that type of node is seen.
31 It does not contain control words like "#define", which are recognized
32 by a separate piece of code. */
34 /* different flavors of hash nodes */
37 T_VOID = 0, /* no definition yet */
38 T_SPECLINE, /* `__LINE__' */
39 T_DATE, /* `__DATE__' */
40 T_FILE, /* `__FILE__' */
41 T_BASE_FILE, /* `__BASE_FILE__' */
42 T_INCLUDE_LEVEL, /* `__INCLUDE_LEVEL__' */
43 T_TIME, /* `__TIME__' */
44 T_STDC, /* `__STDC__' */
45 T_CONST, /* Constant string, used by `__SIZE_TYPE__' etc */
46 T_XCONST, /* Ditto, but the string is malloced memory */
47 T_POISON, /* poisoned identifier */
48 T_MACRO, /* object-like macro */
49 T_FMACRO, /* function-like macro */
50 T_IDENTITY, /* macro defined to itself */
51 T_EMPTY /* macro defined to nothing */
54 typedef struct hashnode HASHNODE;
57 unsigned int hash; /* cached hash value */
58 unsigned short length; /* length of name */
59 ENUM_BITFIELD(node_type) type : 8; /* node type */
60 char disabled; /* macro turned off for rescan? */
63 const char *cpval; /* some predefined macros */
64 const struct object_defn *odefn; /* #define foo bar */
65 const struct funct_defn *fdefn; /* #define foo(x) bar(x) */
66 struct hashnode *aschain; /* #assert */
72 /* List of directories to look for include files in. */
75 struct file_name_list *next;
76 struct file_name_list *alloc; /* for the cache of
77 current directory entries */
80 /* We use these to tell if the directory mentioned here is a duplicate
81 of an earlier directory on the search path. */
84 /* If the following is nonzero, it is a C-language system include
87 /* Mapping of file names for this directory.
88 Only used on MS-DOS and related platforms. */
89 struct file_name_map *name_map;
91 #define ABSOLUTE_PATH ((struct file_name_list *)-1)
93 /* This structure is used for the table of all includes. It is
94 indexed by the `short name' (the name as it appeared in the
95 #include statement) which is stored in *nshort. */
98 /* Next file with the same short name but a
99 different (partial) pathname). */
100 struct ihash *next_this_file;
102 /* Location of the file in the include search path.
103 Used for include_next */
104 struct file_name_list *foundhere;
106 unsigned int hash; /* save hash value for future reference */
107 const char *nshort; /* name of file as referenced in #include;
108 points into name[] */
109 const U_CHAR *control_macro; /* macro, if any, preventing reinclusion -
110 see redundant_include_p */
111 const char name[1]; /* (partial) pathname of file */
113 typedef struct ihash IHASH;
115 /* Character classes.
116 If the definition of `numchar' looks odd to you, please look up the
117 definition of a pp-number in the C standard [section 6.4.8 of C99] */
118 #define ISidnum 0x01 /* a-zA-Z0-9_ */
119 #define ISidstart 0x02 /* _a-zA-Z */
120 #define ISnumstart 0x04 /* 0-9 */
121 #define IShspace 0x08 /* ' ' \t \f \v */
122 #define ISspace 0x10 /* ' ' \t \f \v \n */
124 #define _dollar_ok(x) ((x) == '$' && CPP_OPTION (pfile, dollars_in_ident))
126 #define is_idchar(x) ((_cpp_IStable[x] & ISidnum) || _dollar_ok(x))
127 #define is_idstart(x) ((_cpp_IStable[x] & ISidstart) || _dollar_ok(x))
128 #define is_numchar(x) (_cpp_IStable[x] & ISidnum)
129 #define is_numstart(x) (_cpp_IStable[x] & ISnumstart)
130 #define is_hspace(x) (_cpp_IStable[x] & IShspace)
131 #define is_space(x) (_cpp_IStable[x] & ISspace)
133 /* This table is constant if it can be initialized at compile time,
134 which is the case if cpp was compiled with GCC >=2.7, or another
135 compiler that supports C99. */
136 #if (GCC_VERSION >= 2007) || (__STDC_VERSION__ >= 199901L)
137 extern const unsigned char _cpp_IStable[256];
139 extern unsigned char _cpp_IStable[256];
144 /* One character lookahead in the input buffer. Note that if this
145 returns EOF, it does *not* necessarily mean the file's end has been
147 #define CPP_BUF_PEEK(BUFFER) \
148 ((BUFFER)->cur < (BUFFER)->rlimit ? *(BUFFER)->cur : EOF)
150 /* Make sure PFILE->token_buffer has space for at least N more characters. */
151 #define CPP_RESERVE(PFILE, N) \
152 (CPP_WRITTEN (PFILE) + (size_t)(N) > (PFILE)->token_buffer_size \
153 && (_cpp_grow_token_buffer (PFILE, N), 0))
155 /* Append string STR (of length N) to PFILE's output buffer.
156 Assume there is enough space. */
157 #define CPP_PUTS_Q(PFILE, STR, N) \
158 (memcpy ((PFILE)->limit, STR, (N)), (PFILE)->limit += (N))
159 /* Append string STR (of length N) to PFILE's output buffer. Make space. */
160 #define CPP_PUTS(PFILE, STR, N) CPP_RESERVE(PFILE, N), CPP_PUTS_Q(PFILE, STR,N)
161 /* Append character CH to PFILE's output buffer. Assume sufficient space. */
162 #define CPP_PUTC_Q(PFILE, CH) (*(PFILE)->limit++ = (CH))
163 /* Append character CH to PFILE's output buffer. Make space if need be. */
164 #define CPP_PUTC(PFILE, CH) (CPP_RESERVE (PFILE, 1), CPP_PUTC_Q (PFILE, CH))
166 /* Advance the current line by one. */
167 #define CPP_BUMP_BUFFER_LINE(PBUF) ((PBUF)->lineno++,\
168 (PBUF)->line_base = (PBUF)->cur)
169 #define CPP_BUMP_LINE(PFILE) CPP_BUMP_BUFFER_LINE(CPP_BUFFER(PFILE))
170 #define CPP_BUMP_BUFFER_LINE_CUR(PBUF, CUR) ((PBUF)->lineno++,\
171 (PBUF)->line_base = CUR)
172 #define CPP_BUMP_LINE_CUR(PFILE, CUR) \
173 CPP_BUMP_BUFFER_LINE_CUR(CPP_BUFFER(PFILE), CUR)
174 #define CPP_PREV_BUFFER(BUFFER) ((BUFFER)->prev)
176 /* Are we in column 1 right now? Used mainly for -traditional handling
178 #define CPP_IN_COLUMN_1(PFILE) \
179 (CPP_BUFFER (PFILE)->cur - CPP_BUFFER (PFILE)->line_base == 1)
181 #define CPP_PRINT_DEPS(PFILE) CPP_OPTION (PFILE, print_deps)
182 #define CPP_TRADITIONAL(PFILE) CPP_OPTION (PFILE, traditional)
183 #define CPP_PEDANTIC(PFILE) \
184 (CPP_OPTION (PFILE, pedantic) && !CPP_BUFFER (PFILE)->system_header_p)
185 #define CPP_WTRADITIONAL(PF) \
186 (CPP_OPTION (PF, warn_traditional) && !CPP_BUFFER (PF)->system_header_p)
188 /* CPP_IS_MACRO_BUFFER is true if the buffer contains macro expansion.
189 (Note that it is false while we're expanding macro *arguments*.) */
190 #define CPP_IS_MACRO_BUFFER(PBUF) ((PBUF)->macro != NULL)
192 /* Remember the current position of PFILE so it may be returned to
193 after looking ahead a bit.
195 Note that when you set a mark, you _must_ return to that mark. You
196 may not forget about it and continue parsing. You may not pop a
197 buffer with an active mark. You may not call CPP_BUMP_LINE while a
199 #define CPP_SET_BUF_MARK(IP) ((IP)->mark = (IP)->cur)
200 #define CPP_GOTO_BUF_MARK(IP) ((IP)->cur = (IP)->mark, (IP)->mark = 0)
201 #define CPP_SET_MARK(PFILE) CPP_SET_BUF_MARK(CPP_BUFFER(PFILE))
202 #define CPP_GOTO_MARK(PFILE) CPP_GOTO_BUF_MARK(CPP_BUFFER(PFILE))
204 /* ACTIVE_MARK_P is true if there's a live mark in the buffer. */
205 #define ACTIVE_MARK_P(PFILE) (CPP_BUFFER (PFILE)->mark != 0)
207 /* Are mark and point adjacent characters? Used mostly to deal with
208 the somewhat annoying semantic of #define. */
209 #define ADJACENT_TO_MARK(PFILE) \
210 (CPP_BUFFER(PFILE)->cur - CPP_BUFFER(PFILE)->mark == 1)
213 extern unsigned int _cpp_calc_hash PARAMS ((const U_CHAR *, size_t));
214 extern HASHNODE *_cpp_lookup PARAMS ((cpp_reader *,
215 const U_CHAR *, int));
216 extern void _cpp_free_definition PARAMS ((HASHNODE *));
217 extern int _cpp_create_definition PARAMS ((cpp_reader *,
218 cpp_toklist *, HASHNODE *));
219 extern void _cpp_dump_definition PARAMS ((cpp_reader *, HASHNODE *));
220 extern void _cpp_quote_string PARAMS ((cpp_reader *, const char *));
221 extern void _cpp_macroexpand PARAMS ((cpp_reader *, HASHNODE *));
222 extern void _cpp_init_macro_hash PARAMS ((cpp_reader *));
223 extern void _cpp_dump_macro_hash PARAMS ((cpp_reader *));
226 extern void _cpp_simplify_pathname PARAMS ((char *));
227 extern void _cpp_execute_include PARAMS ((cpp_reader *, char *,
229 struct file_name_list *));
230 extern void _cpp_init_include_hash PARAMS ((cpp_reader *));
231 extern const char *_cpp_fake_ihash PARAMS ((cpp_reader *, const char *));
234 extern int _cpp_parse_expr PARAMS ((cpp_reader *));
237 extern void _cpp_parse_name PARAMS ((cpp_reader *, int));
238 extern void _cpp_skip_rest_of_line PARAMS ((cpp_reader *));
239 extern void _cpp_skip_hspace PARAMS ((cpp_reader *));
240 extern void _cpp_expand_to_buffer PARAMS ((cpp_reader *,
241 const unsigned char *, int));
242 extern int _cpp_parse_assertion PARAMS ((cpp_reader *));
243 extern enum cpp_ttype _cpp_lex_token PARAMS ((cpp_reader *));
244 extern long _cpp_read_and_prescan PARAMS ((cpp_reader *, cpp_buffer *,
246 extern void _cpp_init_input_buffer PARAMS ((cpp_reader *));
247 extern void _cpp_grow_token_buffer PARAMS ((cpp_reader *, long));
248 extern enum cpp_ttype _cpp_get_directive_token
249 PARAMS ((cpp_reader *));
250 extern enum cpp_ttype _cpp_get_define_token
251 PARAMS ((cpp_reader *));
252 extern void _cpp_scan_line PARAMS ((cpp_reader *, cpp_toklist *));
255 extern int _cpp_handle_directive PARAMS ((cpp_reader *));
256 extern void _cpp_unwind_if_stack PARAMS ((cpp_reader *, cpp_buffer *));
257 extern void _cpp_check_directive PARAMS((cpp_toklist *, cpp_token *));