]>
Commit | Line | Data |
---|---|---|
79bd622b | 1 | /* Part of CPP library. (Macro and #define handling.) |
806a3d45 | 2 | Copyright (C) 1986-2014 Free Software Foundation, Inc. |
69461e0d | 3 | Written by Per Bothner, 1994. |
4 | Based on CCCP program by Paul Rubin, June 1986 | |
5 | Adapted to ANSI C, Richard Stallman, Jan 1987 | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify it | |
8 | under the terms of the GNU General Public License as published by the | |
6bc9506f | 9 | Free Software Foundation; either version 3, or (at your option) any |
69461e0d | 10 | later version. |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
6bc9506f | 18 | along with this program; see the file COPYING3. If not see |
19 | <http://www.gnu.org/licenses/>. | |
69461e0d | 20 | |
21 | In other words, you are welcome to use, share and improve this program. | |
22 | You are forbidden to forbid anyone else to use, share and improve | |
23 | what you give them. Help stamp out software-hoarding! */ | |
24 | ||
25 | #include "config.h" | |
26 | #include "system.h" | |
27 | #include "cpplib.h" | |
d856c8a6 | 28 | #include "internal.h" |
69461e0d | 29 | |
79bd622b | 30 | typedef struct macro_arg macro_arg; |
ce70f433 | 31 | /* This structure represents the tokens of a macro argument. These |
32 | tokens can be macro themselves, in which case they can be either | |
33 | expanded or unexpanded. When they are expanded, this data | |
34 | structure keeps both the expanded and unexpanded forms. */ | |
79bd622b | 35 | struct macro_arg |
36 | { | |
f9b5f742 | 37 | const cpp_token **first; /* First token in unexpanded argument. */ |
1e625a2e | 38 | const cpp_token **expanded; /* Macro-expanded argument. */ |
f9b5f742 | 39 | const cpp_token *stringified; /* Stringified argument. */ |
79bd622b | 40 | unsigned int count; /* # of tokens in argument. */ |
41 | unsigned int expanded_count; /* # of tokens in expanded argument. */ | |
ce70f433 | 42 | source_location *virt_locs; /* Where virtual locations for |
43 | unexpanded tokens are stored. */ | |
44 | source_location *expanded_virt_locs; /* Where virtual locations for | |
45 | expanded tokens are | |
46 | stored. */ | |
47 | }; | |
48 | ||
49 | /* The kind of macro tokens which the instance of | |
50 | macro_arg_token_iter is supposed to iterate over. */ | |
51 | enum macro_arg_token_kind { | |
52 | MACRO_ARG_TOKEN_NORMAL, | |
53 | /* This is a macro argument token that got transformed into a string | |
54 | litteral, e.g. #foo. */ | |
55 | MACRO_ARG_TOKEN_STRINGIFIED, | |
56 | /* This is a token resulting from the expansion of a macro | |
57 | argument that was itself a macro. */ | |
58 | MACRO_ARG_TOKEN_EXPANDED | |
59 | }; | |
60 | ||
61 | /* An iterator over tokens coming from a function-like macro | |
62 | argument. */ | |
63 | typedef struct macro_arg_token_iter macro_arg_token_iter; | |
64 | struct macro_arg_token_iter | |
65 | { | |
66 | /* Whether or not -ftrack-macro-expansion is used. */ | |
67 | bool track_macro_exp_p; | |
68 | /* The kind of token over which we are supposed to iterate. */ | |
69 | enum macro_arg_token_kind kind; | |
70 | /* A pointer to the current token pointed to by the iterator. */ | |
71 | const cpp_token **token_ptr; | |
72 | /* A pointer to the "full" location of the current token. If | |
e8aa7eaf | 73 | -ftrack-macro-expansion is used this location tracks loci across |
ce70f433 | 74 | macro expansion. */ |
75 | const source_location *location_ptr; | |
76 | #ifdef ENABLE_CHECKING | |
77 | /* The number of times the iterator went forward. This useful only | |
78 | when checking is enabled. */ | |
79 | size_t num_forwards; | |
80 | #endif | |
69461e0d | 81 | }; |
82 | ||
79bd622b | 83 | /* Macro expansion. */ |
84 | ||
45f9f140 | 85 | static int enter_macro_context (cpp_reader *, cpp_hashnode *, |
ce70f433 | 86 | const cpp_token *, source_location); |
2e82cf2c | 87 | static int builtin_macro (cpp_reader *, cpp_hashnode *, source_location); |
f7fdd7a1 | 88 | static void push_ptoken_context (cpp_reader *, cpp_hashnode *, _cpp_buff *, |
89 | const cpp_token **, unsigned int); | |
ce70f433 | 90 | static void push_extended_tokens_context (cpp_reader *, cpp_hashnode *, |
91 | _cpp_buff *, source_location *, | |
92 | const cpp_token **, unsigned int); | |
45f9f140 | 93 | static _cpp_buff *collect_args (cpp_reader *, const cpp_hashnode *, |
ce70f433 | 94 | _cpp_buff **, unsigned *); |
f7fdd7a1 | 95 | static cpp_context *next_context (cpp_reader *); |
96 | static const cpp_token *padding_token (cpp_reader *, const cpp_token *); | |
97 | static void expand_arg (cpp_reader *, macro_arg *); | |
98 | static const cpp_token *new_string_token (cpp_reader *, uchar *, unsigned int); | |
99 | static const cpp_token *stringify_arg (cpp_reader *, macro_arg *); | |
100 | static void paste_all_tokens (cpp_reader *, const cpp_token *); | |
8c6425eb | 101 | static bool paste_tokens (cpp_reader *, source_location, |
102 | const cpp_token **, const cpp_token *); | |
ce70f433 | 103 | static void alloc_expanded_arg_mem (cpp_reader *, macro_arg *, size_t); |
104 | static void ensure_expanded_arg_room (cpp_reader *, macro_arg *, size_t, size_t *); | |
105 | static void delete_macro_args (_cpp_buff*, unsigned num_args); | |
106 | static void set_arg_token (macro_arg *, const cpp_token *, | |
107 | source_location, size_t, | |
108 | enum macro_arg_token_kind, | |
109 | bool); | |
110 | static const source_location *get_arg_token_location (const macro_arg *, | |
111 | enum macro_arg_token_kind); | |
112 | static const cpp_token **arg_token_ptr_at (const macro_arg *, | |
113 | size_t, | |
114 | enum macro_arg_token_kind, | |
115 | source_location **virt_location); | |
116 | ||
117 | static void macro_arg_token_iter_init (macro_arg_token_iter *, bool, | |
118 | enum macro_arg_token_kind, | |
119 | const macro_arg *, | |
120 | const cpp_token **); | |
121 | static const cpp_token *macro_arg_token_iter_get_token | |
122 | (const macro_arg_token_iter *it); | |
123 | static source_location macro_arg_token_iter_get_location | |
124 | (const macro_arg_token_iter *); | |
125 | static void macro_arg_token_iter_forward (macro_arg_token_iter *); | |
126 | static _cpp_buff *tokens_buff_new (cpp_reader *, size_t, | |
127 | source_location **); | |
128 | static size_t tokens_buff_count (_cpp_buff *); | |
129 | static const cpp_token **tokens_buff_last_token_ptr (_cpp_buff *); | |
80e34234 | 130 | static inline const cpp_token **tokens_buff_put_token_to (const cpp_token **, |
131 | source_location *, | |
132 | const cpp_token *, | |
133 | source_location, | |
134 | source_location, | |
135 | const struct line_map *, | |
136 | unsigned int); | |
ce70f433 | 137 | |
138 | static const cpp_token **tokens_buff_add_token (_cpp_buff *, | |
139 | source_location *, | |
140 | const cpp_token *, | |
141 | source_location, | |
142 | source_location, | |
143 | const struct line_map *, | |
144 | unsigned int); | |
80e34234 | 145 | static inline void tokens_buff_remove_last_token (_cpp_buff *); |
f7fdd7a1 | 146 | static void replace_args (cpp_reader *, cpp_hashnode *, cpp_macro *, |
ce70f433 | 147 | macro_arg *, source_location); |
45f9f140 | 148 | static _cpp_buff *funlike_invocation_p (cpp_reader *, cpp_hashnode *, |
ce70f433 | 149 | _cpp_buff **, unsigned *); |
f7fdd7a1 | 150 | static bool create_iso_definition (cpp_reader *, cpp_macro *); |
79bd622b | 151 | |
79bd622b | 152 | /* #define directive parsing and handling. */ |
153 | ||
f7fdd7a1 | 154 | static cpp_token *alloc_expansion_token (cpp_reader *, cpp_macro *); |
155 | static cpp_token *lex_expansion_token (cpp_reader *, cpp_macro *); | |
25692381 | 156 | static bool warn_of_redefinition (cpp_reader *, cpp_hashnode *, |
f7fdd7a1 | 157 | const cpp_macro *); |
158 | static bool parse_params (cpp_reader *, cpp_macro *); | |
159 | static void check_trad_stringification (cpp_reader *, const cpp_macro *, | |
160 | const cpp_string *); | |
ce70f433 | 161 | static bool reached_end_of_context (cpp_context *); |
162 | static void consume_next_token_from_context (cpp_reader *pfile, | |
163 | const cpp_token **, | |
164 | source_location *); | |
165 | static const cpp_token* cpp_get_token_1 (cpp_reader *, source_location *); | |
69461e0d | 166 | |
00abfdc0 | 167 | static cpp_hashnode* macro_of_context (cpp_context *context); |
168 | ||
8c6425eb | 169 | static bool in_macro_expansion_p (cpp_reader *pfile); |
170 | ||
e77b8253 | 171 | /* Statistical counter tracking the number of macros that got |
172 | expanded. */ | |
173 | unsigned num_expanded_macros_counter = 0; | |
174 | /* Statistical counter tracking the total number tokens resulting | |
175 | from macro expansion. */ | |
176 | unsigned num_macro_tokens_counter = 0; | |
177 | ||
71a7c282 | 178 | /* Emits a warning if NODE is a macro defined in the main file that |
179 | has not been used. */ | |
180 | int | |
f7fdd7a1 | 181 | _cpp_warn_if_unused_macro (cpp_reader *pfile, cpp_hashnode *node, |
182 | void *v ATTRIBUTE_UNUSED) | |
71a7c282 | 183 | { |
184 | if (node->type == NT_MACRO && !(node->flags & NODE_BUILTIN)) | |
185 | { | |
186 | cpp_macro *macro = node->value.macro; | |
187 | ||
188 | if (!macro->used | |
ceec9c13 | 189 | && MAIN_FILE_P (linemap_lookup (pfile->line_table, macro->line))) |
3a79f5da | 190 | cpp_warning_with_line (pfile, CPP_W_UNUSED_MACROS, macro->line, 0, |
191 | "macro \"%s\" is not used", NODE_NAME (node)); | |
71a7c282 | 192 | } |
193 | ||
194 | return 1; | |
195 | } | |
196 | ||
f9b5f742 | 197 | /* Allocates and returns a CPP_STRING token, containing TEXT of length |
198 | LEN, after null-terminating it. TEXT must be in permanent storage. */ | |
199 | static const cpp_token * | |
f7fdd7a1 | 200 | new_string_token (cpp_reader *pfile, unsigned char *text, unsigned int len) |
79bd622b | 201 | { |
f9b5f742 | 202 | cpp_token *token = _cpp_temp_token (pfile); |
79bd622b | 203 | |
f9b5f742 | 204 | text[len] = '\0'; |
79bd622b | 205 | token->type = CPP_STRING; |
f9b5f742 | 206 | token->val.str.len = len; |
207 | token->val.str.text = text; | |
79bd622b | 208 | token->flags = 0; |
f9b5f742 | 209 | return token; |
79bd622b | 210 | } |
211 | ||
79bd622b | 212 | static const char * const monthnames[] = |
213 | { | |
214 | "Jan", "Feb", "Mar", "Apr", "May", "Jun", | |
215 | "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" | |
216 | }; | |
217 | ||
d6d3c909 | 218 | /* Helper function for builtin_macro. Returns the text generated by |
219 | a builtin macro. */ | |
9c343313 | 220 | const uchar * |
f7fdd7a1 | 221 | _cpp_builtin_macro_text (cpp_reader *pfile, cpp_hashnode *node) |
79bd622b | 222 | { |
9c343313 | 223 | const uchar *result = NULL; |
4999c35b | 224 | linenum_type number = 1; |
c7e5d924 | 225 | |
79bd622b | 226 | switch (node->value.builtin) |
227 | { | |
f9b5f742 | 228 | default: |
d80d2074 | 229 | cpp_error (pfile, CPP_DL_ICE, "invalid built-in macro \"%s\"", |
73328dce | 230 | NODE_NAME (node)); |
9c343313 | 231 | break; |
f9b5f742 | 232 | |
cca5dddc | 233 | case BT_TIMESTAMP: |
234 | { | |
9148bda3 | 235 | if (CPP_OPTION (pfile, warn_date_time)) |
5b1a0622 | 236 | cpp_warning (pfile, CPP_W_DATE_TIME, "macro \"%s\" might prevent " |
237 | "reproducible builds", NODE_NAME (node)); | |
9148bda3 | 238 | |
cca5dddc | 239 | cpp_buffer *pbuffer = cpp_get_buffer (pfile); |
240 | if (pbuffer->timestamp == NULL) | |
241 | { | |
242 | /* Initialize timestamp value of the assotiated file. */ | |
243 | struct _cpp_file *file = cpp_get_file (pbuffer); | |
244 | if (file) | |
245 | { | |
246 | /* Generate __TIMESTAMP__ string, that represents | |
247 | the date and time of the last modification | |
248 | of the current source file. The string constant | |
249 | looks like "Sun Sep 16 01:03:52 1973". */ | |
250 | struct tm *tb = NULL; | |
251 | struct stat *st = _cpp_get_file_stat (file); | |
252 | if (st) | |
253 | tb = localtime (&st->st_mtime); | |
254 | if (tb) | |
255 | { | |
256 | char *str = asctime (tb); | |
257 | size_t len = strlen (str); | |
258 | unsigned char *buf = _cpp_unaligned_alloc (pfile, len + 2); | |
259 | buf[0] = '"'; | |
260 | strcpy ((char *) buf + 1, str); | |
261 | buf[len] = '"'; | |
262 | pbuffer->timestamp = buf; | |
263 | } | |
264 | else | |
265 | { | |
266 | cpp_errno (pfile, CPP_DL_WARNING, | |
267 | "could not determine file timestamp"); | |
924bbf02 | 268 | pbuffer->timestamp = UC"\"??? ??? ?? ??:??:?? ????\""; |
cca5dddc | 269 | } |
270 | } | |
271 | } | |
272 | result = pbuffer->timestamp; | |
273 | } | |
274 | break; | |
79bd622b | 275 | case BT_FILE: |
276 | case BT_BASE_FILE: | |
69461e0d | 277 | { |
f9b5f742 | 278 | unsigned int len; |
6cee4464 | 279 | const char *name; |
b6d18b0a | 280 | uchar *buf; |
97bfb9ef | 281 | |
282 | if (node->value.builtin == BT_FILE) | |
283 | name = linemap_get_expansion_filename (pfile->line_table, | |
284 | pfile->line_table->highest_line); | |
285 | else | |
286 | { | |
5e791406 | 287 | name = _cpp_get_file_name (pfile->main_file); |
288 | if (!name) | |
289 | abort (); | |
97bfb9ef | 290 | } |
f9b5f742 | 291 | len = strlen (name); |
cc9012f7 | 292 | buf = _cpp_unaligned_alloc (pfile, len * 2 + 3); |
9c343313 | 293 | result = buf; |
294 | *buf = '"'; | |
295 | buf = cpp_quote_string (buf + 1, (const unsigned char *) name, len); | |
296 | *buf++ = '"'; | |
297 | *buf = '\0'; | |
69461e0d | 298 | } |
c7e5d924 | 299 | break; |
300 | ||
79bd622b | 301 | case BT_INCLUDE_LEVEL: |
4087823d | 302 | /* The line map depth counts the primary source as level 1, but |
303 | historically __INCLUDE_DEPTH__ has called the primary source | |
304 | level 0. */ | |
ceec9c13 | 305 | number = pfile->line_table->depth - 1; |
c7e5d924 | 306 | break; |
79bd622b | 307 | |
308 | case BT_SPECLINE: | |
309 | /* If __LINE__ is embedded in a macro, it must expand to the | |
310 | line of the macro's invocation, not its definition. | |
311 | Otherwise things like assert() will not work properly. */ | |
97bfb9ef | 312 | number = linemap_get_expansion_line (pfile->line_table, |
313 | CPP_OPTION (pfile, traditional) | |
314 | ? pfile->line_table->highest_line | |
315 | : pfile->cur_token[-1].src_loc); | |
c7e5d924 | 316 | break; |
79bd622b | 317 | |
63994318 | 318 | /* __STDC__ has the value 1 under normal circumstances. |
319 | However, if (a) we are in a system header, (b) the option | |
965e9876 | 320 | stdc_0_in_system_headers is true (set by target config), and |
321 | (c) we are not in strictly conforming mode, then it has the | |
31614f7c | 322 | value 0. (b) and (c) are already checked in cpp_init_builtins. */ |
79bd622b | 323 | case BT_STDC: |
31614f7c | 324 | if (cpp_in_system_header (pfile)) |
325 | number = 0; | |
326 | else | |
327 | number = 1; | |
c7e5d924 | 328 | break; |
69461e0d | 329 | |
79bd622b | 330 | case BT_DATE: |
331 | case BT_TIME: | |
9148bda3 | 332 | if (CPP_OPTION (pfile, warn_date_time)) |
5b1a0622 | 333 | cpp_warning (pfile, CPP_W_DATE_TIME, "macro \"%s\" might prevent " |
334 | "reproducible builds", NODE_NAME (node)); | |
9c343313 | 335 | if (pfile->date == NULL) |
79bd622b | 336 | { |
f9b5f742 | 337 | /* Allocate __DATE__ and __TIME__ strings from permanent |
338 | storage. We only do this once, and don't generate them | |
339 | at init time, because time() and localtime() are very | |
340 | slow on some systems. */ | |
3385506f | 341 | time_t tt; |
342 | struct tm *tb = NULL; | |
343 | ||
344 | /* (time_t) -1 is a legitimate value for "number of seconds | |
345 | since the Epoch", so we have to do a little dance to | |
346 | distinguish that from a genuine error. */ | |
347 | errno = 0; | |
348 | tt = time(NULL); | |
349 | if (tt != (time_t)-1 || errno == 0) | |
350 | tb = localtime (&tt); | |
351 | ||
352 | if (tb) | |
353 | { | |
354 | pfile->date = _cpp_unaligned_alloc (pfile, | |
355 | sizeof ("\"Oct 11 1347\"")); | |
356 | sprintf ((char *) pfile->date, "\"%s %2d %4d\"", | |
f7fdd7a1 | 357 | monthnames[tb->tm_mon], tb->tm_mday, |
358 | tb->tm_year + 1900); | |
3385506f | 359 | |
360 | pfile->time = _cpp_unaligned_alloc (pfile, | |
361 | sizeof ("\"12:34:56\"")); | |
362 | sprintf ((char *) pfile->time, "\"%02d:%02d:%02d\"", | |
363 | tb->tm_hour, tb->tm_min, tb->tm_sec); | |
364 | } | |
365 | else | |
366 | { | |
d80d2074 | 367 | cpp_errno (pfile, CPP_DL_WARNING, |
3385506f | 368 | "could not determine date and time"); |
369 | ||
924bbf02 | 370 | pfile->date = UC"\"??? ?? ????\""; |
371 | pfile->time = UC"\"??:??:??\""; | |
3385506f | 372 | } |
79bd622b | 373 | } |
79bd622b | 374 | |
c7e5d924 | 375 | if (node->value.builtin == BT_DATE) |
9c343313 | 376 | result = pfile->date; |
c7e5d924 | 377 | else |
9c343313 | 378 | result = pfile->time; |
c7e5d924 | 379 | break; |
ce079f70 | 380 | |
381 | case BT_COUNTER: | |
fcde64dc | 382 | if (CPP_OPTION (pfile, directives_only) && pfile->state.in_directive) |
383 | cpp_error (pfile, CPP_DL_ERROR, | |
384 | "__COUNTER__ expanded inside directive with -fdirectives-only"); | |
ce079f70 | 385 | number = pfile->counter++; |
386 | break; | |
9c343313 | 387 | } |
388 | ||
389 | if (result == NULL) | |
390 | { | |
391 | /* 21 bytes holds all NUL-terminated unsigned 64-bit numbers. */ | |
392 | result = _cpp_unaligned_alloc (pfile, 21); | |
393 | sprintf ((char *) result, "%u", number); | |
394 | } | |
395 | ||
396 | return result; | |
397 | } | |
398 | ||
399 | /* Convert builtin macros like __FILE__ to a token and push it on the | |
d6d3c909 | 400 | context stack. Also handles _Pragma, for which a new token may not |
401 | be created. Returns 1 if it generates a new token context, 0 to | |
2e82cf2c | 402 | return the token to the caller. LOC is the location of the expansion |
403 | point of the macro. */ | |
9c343313 | 404 | static int |
2e82cf2c | 405 | builtin_macro (cpp_reader *pfile, cpp_hashnode *node, source_location loc) |
9c343313 | 406 | { |
407 | const uchar *buf; | |
a54e0bf8 | 408 | size_t len; |
409 | char *nbuf; | |
c7e5d924 | 410 | |
9c343313 | 411 | if (node->value.builtin == BT_PRAGMA) |
412 | { | |
c7e5d924 | 413 | /* Don't interpret _Pragma within directives. The standard is |
414 | not clear on this, but to me this makes most sense. */ | |
415 | if (pfile->state.in_directive) | |
416 | return 0; | |
417 | ||
2d507e67 | 418 | return _cpp_do__Pragma (pfile); |
79bd622b | 419 | } |
c7e5d924 | 420 | |
9c343313 | 421 | buf = _cpp_builtin_macro_text (pfile, node); |
a54e0bf8 | 422 | len = ustrlen (buf); |
720aca92 | 423 | nbuf = (char *) alloca (len + 1); |
a54e0bf8 | 424 | memcpy (nbuf, buf, len); |
425 | nbuf[len]='\n'; | |
9c343313 | 426 | |
9eb74666 | 427 | cpp_push_buffer (pfile, (uchar *) nbuf, len, /* from_stage3 */ true); |
a54e0bf8 | 428 | _cpp_clean_line (pfile); |
9c343313 | 429 | |
430 | /* Set pfile->cur_token as required by _cpp_lex_direct. */ | |
431 | pfile->cur_token = _cpp_temp_token (pfile); | |
a4cfdfed | 432 | cpp_token *token = _cpp_lex_direct (pfile); |
2e82cf2c | 433 | /* We should point to the expansion point of the builtin macro. */ |
434 | token->src_loc = loc; | |
a4cfdfed | 435 | if (pfile->context->tokens_kind == TOKENS_KIND_EXTENDED) |
436 | { | |
437 | /* We are tracking tokens resulting from macro expansion. | |
438 | Create a macro line map and generate a virtual location for | |
439 | the token resulting from the expansion of the built-in | |
440 | macro. */ | |
441 | source_location *virt_locs = NULL; | |
442 | _cpp_buff *token_buf = tokens_buff_new (pfile, 1, &virt_locs); | |
443 | const line_map * map = | |
444 | linemap_enter_macro (pfile->line_table, node, | |
445 | token->src_loc, 1); | |
446 | tokens_buff_add_token (token_buf, virt_locs, token, | |
447 | pfile->line_table->builtin_location, | |
448 | pfile->line_table->builtin_location, | |
449 | map, /*macro_token_index=*/0); | |
450 | push_extended_tokens_context (pfile, node, token_buf, virt_locs, | |
451 | (const cpp_token **)token_buf->base, | |
452 | 1); | |
453 | } | |
454 | else | |
455 | _cpp_push_token_context (pfile, NULL, token, 1); | |
9c343313 | 456 | if (pfile->buffer->cur != pfile->buffer->rlimit) |
d80d2074 | 457 | cpp_error (pfile, CPP_DL_ICE, "invalid built-in macro \"%s\"", |
9c343313 | 458 | NODE_NAME (node)); |
459 | _cpp_pop_buffer (pfile); | |
460 | ||
c7e5d924 | 461 | return 1; |
69461e0d | 462 | } |
463 | ||
88cf66fa | 464 | /* Copies SRC, of length LEN, to DEST, adding backslashes before all |
cc9012f7 | 465 | backslashes and double quotes. DEST must be of sufficient size. |
466 | Returns a pointer to the end of the string. */ | |
b6d18b0a | 467 | uchar * |
f7fdd7a1 | 468 | cpp_quote_string (uchar *dest, const uchar *src, unsigned int len) |
79bd622b | 469 | { |
470 | while (len--) | |
471 | { | |
b6d18b0a | 472 | uchar c = *src++; |
69461e0d | 473 | |
79bd622b | 474 | if (c == '\\' || c == '"') |
475 | { | |
476 | *dest++ = '\\'; | |
477 | *dest++ = c; | |
478 | } | |
479 | else | |
cc9012f7 | 480 | *dest++ = c; |
79bd622b | 481 | } |
69461e0d | 482 | |
79bd622b | 483 | return dest; |
484 | } | |
69461e0d | 485 | |
88cf66fa | 486 | /* Convert a token sequence ARG to a single string token according to |
487 | the rules of the ISO C #-operator. */ | |
f9b5f742 | 488 | static const cpp_token * |
f7fdd7a1 | 489 | stringify_arg (cpp_reader *pfile, macro_arg *arg) |
79bd622b | 490 | { |
4970d4c2 | 491 | unsigned char *dest; |
1fdf6039 | 492 | unsigned int i, escape_it, backslash_count = 0; |
f9b5f742 | 493 | const cpp_token *source = NULL; |
1fdf6039 | 494 | size_t len; |
69461e0d | 495 | |
4970d4c2 | 496 | if (BUFF_ROOM (pfile->u_buff) < 3) |
497 | _cpp_extend_buff (pfile, &pfile->u_buff, 3); | |
498 | dest = BUFF_FRONT (pfile->u_buff); | |
499 | *dest++ = '"'; | |
500 | ||
79bd622b | 501 | /* Loop, reading in the argument's tokens. */ |
502 | for (i = 0; i < arg->count; i++) | |
503 | { | |
f9b5f742 | 504 | const cpp_token *token = arg->first[i]; |
f9b5f742 | 505 | |
506 | if (token->type == CPP_PADDING) | |
507 | { | |
e21164ef | 508 | if (source == NULL |
509 | || (!(source->flags & PREV_WHITE) | |
510 | && token->val.source == NULL)) | |
f9b5f742 | 511 | source = token->val.source; |
512 | continue; | |
513 | } | |
69461e0d | 514 | |
924bbf02 | 515 | escape_it = (token->type == CPP_STRING || token->type == CPP_CHAR |
2a50bfcf | 516 | || token->type == CPP_WSTRING || token->type == CPP_WCHAR |
924bbf02 | 517 | || token->type == CPP_STRING32 || token->type == CPP_CHAR32 |
538ba11a | 518 | || token->type == CPP_STRING16 || token->type == CPP_CHAR16 |
1608bb4b | 519 | || token->type == CPP_UTF8STRING |
520 | || cpp_userdef_string_p (token->type) | |
521 | || cpp_userdef_char_p (token->type)); | |
df271348 | 522 | |
1fdf6039 | 523 | /* Room for each char being written in octal, initial space and |
4970d4c2 | 524 | final quote and NUL. */ |
f9b5f742 | 525 | len = cpp_token_len (token); |
79bd622b | 526 | if (escape_it) |
79bd622b | 527 | len *= 4; |
4970d4c2 | 528 | len += 3; |
69461e0d | 529 | |
1fdf6039 | 530 | if ((size_t) (BUFF_LIMIT (pfile->u_buff) - dest) < len) |
79bd622b | 531 | { |
1fdf6039 | 532 | size_t len_so_far = dest - BUFF_FRONT (pfile->u_buff); |
e6a5f963 | 533 | _cpp_extend_buff (pfile, &pfile->u_buff, len); |
1fdf6039 | 534 | dest = BUFF_FRONT (pfile->u_buff) + len_so_far; |
79bd622b | 535 | } |
69461e0d | 536 | |
f9b5f742 | 537 | /* Leading white space? */ |
4970d4c2 | 538 | if (dest - 1 != BUFF_FRONT (pfile->u_buff)) |
f9b5f742 | 539 | { |
540 | if (source == NULL) | |
541 | source = token; | |
542 | if (source->flags & PREV_WHITE) | |
543 | *dest++ = ' '; | |
544 | } | |
545 | source = NULL; | |
69461e0d | 546 | |
79bd622b | 547 | if (escape_it) |
548 | { | |
1fdf6039 | 549 | _cpp_buff *buff = _cpp_get_buff (pfile, len); |
550 | unsigned char *buf = BUFF_FRONT (buff); | |
bb1fa6bb | 551 | len = cpp_spell_token (pfile, token, buf, true) - buf; |
25266990 | 552 | dest = cpp_quote_string (dest, buf, len); |
1fdf6039 | 553 | _cpp_release_buff (pfile, buff); |
79bd622b | 554 | } |
555 | else | |
bb1fa6bb | 556 | dest = cpp_spell_token (pfile, token, dest, true); |
79bd622b | 557 | |
bc205914 | 558 | if (token->type == CPP_OTHER && token->val.str.text[0] == '\\') |
79bd622b | 559 | backslash_count++; |
560 | else | |
561 | backslash_count = 0; | |
562 | } | |
563 | ||
564 | /* Ignore the final \ of invalid string literals. */ | |
565 | if (backslash_count & 1) | |
566 | { | |
d80d2074 | 567 | cpp_error (pfile, CPP_DL_WARNING, |
73328dce | 568 | "invalid string literal, ignoring final '\\'"); |
1fdf6039 | 569 | dest--; |
79bd622b | 570 | } |
571 | ||
f9b5f742 | 572 | /* Commit the memory, including NUL, and return the token. */ |
4970d4c2 | 573 | *dest++ = '"'; |
1fdf6039 | 574 | len = dest - BUFF_FRONT (pfile->u_buff); |
575 | BUFF_FRONT (pfile->u_buff) = dest + 1; | |
576 | return new_string_token (pfile, dest - len, len); | |
79bd622b | 577 | } |
578 | ||
d10cfa8d | 579 | /* Try to paste two tokens. On success, return nonzero. In any |
1785b647 | 580 | case, PLHS is updated to point to the pasted token, which is |
8c6425eb | 581 | guaranteed to not have the PASTE_LEFT flag set. LOCATION is |
582 | the virtual location used for error reporting. */ | |
1785b647 | 583 | static bool |
8c6425eb | 584 | paste_tokens (cpp_reader *pfile, source_location location, |
585 | const cpp_token **plhs, const cpp_token *rhs) | |
08138c65 | 586 | { |
46139d3f | 587 | unsigned char *buf, *end, *lhsend; |
3127c357 | 588 | cpp_token *lhs; |
1785b647 | 589 | unsigned int len; |
1785b647 | 590 | |
3127c357 | 591 | len = cpp_token_len (*plhs) + cpp_token_len (rhs) + 1; |
720aca92 | 592 | buf = (unsigned char *) alloca (len); |
3127c357 | 593 | end = lhsend = cpp_spell_token (pfile, *plhs, buf, false); |
1785b647 | 594 | |
595 | /* Avoid comment headers, since they are still processed in stage 3. | |
596 | It is simpler to insert a space here, rather than modifying the | |
597 | lexer to ignore comments in some circumstances. Simply returning | |
598 | false doesn't work, since we want to clear the PASTE_LEFT flag. */ | |
3127c357 | 599 | if ((*plhs)->type == CPP_DIV && rhs->type != CPP_EQ) |
1785b647 | 600 | *end++ = ' '; |
1991d8eb | 601 | /* In one obscure case we might see padding here. */ |
602 | if (rhs->type != CPP_PADDING) | |
603 | end = cpp_spell_token (pfile, rhs, end, false); | |
a54e0bf8 | 604 | *end = '\n'; |
1785b647 | 605 | |
9eb74666 | 606 | cpp_push_buffer (pfile, buf, end - buf, /* from_stage3 */ true); |
a54e0bf8 | 607 | _cpp_clean_line (pfile); |
1785b647 | 608 | |
609 | /* Set pfile->cur_token as required by _cpp_lex_direct. */ | |
610 | pfile->cur_token = _cpp_temp_token (pfile); | |
3127c357 | 611 | lhs = _cpp_lex_direct (pfile); |
46139d3f | 612 | if (pfile->buffer->cur != pfile->buffer->rlimit) |
613 | { | |
3127c357 | 614 | source_location saved_loc = lhs->src_loc; |
615 | ||
46139d3f | 616 | _cpp_pop_buffer (pfile); |
617 | _cpp_backup_tokens (pfile, 1); | |
618 | *lhsend = '\0'; | |
619 | ||
3127c357 | 620 | /* We have to remove the PASTE_LEFT flag from the old lhs, but |
621 | we want to keep the new location. */ | |
622 | *lhs = **plhs; | |
623 | *plhs = lhs; | |
624 | lhs->src_loc = saved_loc; | |
625 | lhs->flags &= ~PASTE_LEFT; | |
626 | ||
46139d3f | 627 | /* Mandatory error for all apart from assembler. */ |
628 | if (CPP_OPTION (pfile, lang) != CLK_ASM) | |
8c6425eb | 629 | cpp_error_with_line (pfile, CPP_DL_ERROR, location, 0, |
46139d3f | 630 | "pasting \"%s\" and \"%s\" does not give a valid preprocessing token", |
631 | buf, cpp_token_as_text (pfile, rhs)); | |
632 | return false; | |
633 | } | |
1785b647 | 634 | |
3127c357 | 635 | *plhs = lhs; |
46139d3f | 636 | _cpp_pop_buffer (pfile); |
637 | return true; | |
08138c65 | 638 | } |
639 | ||
88cf66fa | 640 | /* Handles an arbitrarily long sequence of ## operators, with initial |
641 | operand LHS. This implementation is left-associative, | |
642 | non-recursive, and finishes a paste before handling succeeding | |
643 | ones. If a paste fails, we back up to the RHS of the failing ## | |
644 | operator before pushing the context containing the result of prior | |
645 | successful pastes, with the effect that the RHS appears in the | |
646 | output stream after the pasted LHS normally. */ | |
79bd622b | 647 | static void |
f7fdd7a1 | 648 | paste_all_tokens (cpp_reader *pfile, const cpp_token *lhs) |
79bd622b | 649 | { |
ce70f433 | 650 | const cpp_token *rhs = NULL; |
f9b5f742 | 651 | cpp_context *context = pfile->context; |
c55700de | 652 | source_location virt_loc = 0; |
653 | ||
8c6425eb | 654 | /* We are expanding a macro and we must have been called on a token |
655 | that appears at the left hand side of a ## operator. */ | |
656 | if (macro_of_context (pfile->context) == NULL | |
657 | || (!(lhs->flags & PASTE_LEFT))) | |
c55700de | 658 | abort (); |
659 | ||
660 | if (context->tokens_kind == TOKENS_KIND_EXTENDED) | |
661 | /* The caller must have called consume_next_token_from_context | |
662 | right before calling us. That has incremented the pointer to | |
663 | the current virtual location. So it now points to the location | |
664 | of the token that comes right after *LHS. We want the | |
665 | resulting pasted token to have the location of the current | |
666 | *LHS, though. */ | |
667 | virt_loc = context->c.mc->cur_virt_loc[-1]; | |
8c6425eb | 668 | else |
669 | /* We are not tracking macro expansion. So the best virtual | |
670 | location we can get here is the expansion point of the macro we | |
671 | are currently expanding. */ | |
672 | virt_loc = pfile->invocation_location; | |
f9b5f742 | 673 | |
79bd622b | 674 | do |
675 | { | |
676 | /* Take the token directly from the current context. We can do | |
677 | this, because we are in the replacement list of either an | |
678 | object-like macro, or a function-like macro with arguments | |
679 | inserted. In either case, the constraints to #define | |
08138c65 | 680 | guarantee we have at least one more token. */ |
ce70f433 | 681 | if (context->tokens_kind == TOKENS_KIND_DIRECT) |
a854276a | 682 | rhs = FIRST (context).token++; |
ce70f433 | 683 | else if (context->tokens_kind == TOKENS_KIND_INDIRECT) |
a854276a | 684 | rhs = *FIRST (context).ptoken++; |
ce70f433 | 685 | else if (context->tokens_kind == TOKENS_KIND_EXTENDED) |
686 | { | |
687 | /* So we are in presence of an extended token context, which | |
688 | means that each token in this context has a virtual | |
689 | location attached to it. So let's not forget to update | |
690 | the pointer to the current virtual location of the | |
691 | current token when we update the pointer to the current | |
692 | token */ | |
693 | ||
694 | rhs = *FIRST (context).ptoken++; | |
695 | /* context->c.mc must be non-null, as if we were not in a | |
696 | macro context, context->tokens_kind could not be equal to | |
697 | TOKENS_KIND_EXTENDED. */ | |
698 | context->c.mc->cur_virt_loc++; | |
699 | } | |
f9b5f742 | 700 | |
701 | if (rhs->type == CPP_PADDING) | |
1991d8eb | 702 | { |
703 | if (rhs->flags & PASTE_LEFT) | |
704 | abort (); | |
705 | } | |
8c6425eb | 706 | if (!paste_tokens (pfile, virt_loc, &lhs, rhs)) |
46139d3f | 707 | break; |
79bd622b | 708 | } |
709 | while (rhs->flags & PASTE_LEFT); | |
710 | ||
1785b647 | 711 | /* Put the resulting token in its own context. */ |
c55700de | 712 | if (context->tokens_kind == TOKENS_KIND_EXTENDED) |
713 | { | |
714 | source_location *virt_locs = NULL; | |
715 | _cpp_buff *token_buf = tokens_buff_new (pfile, 1, &virt_locs); | |
716 | tokens_buff_add_token (token_buf, virt_locs, lhs, | |
717 | virt_loc, 0, NULL, 0); | |
718 | push_extended_tokens_context (pfile, context->c.mc->macro_node, | |
719 | token_buf, virt_locs, | |
720 | (const cpp_token **)token_buf->base, 1); | |
721 | } | |
722 | else | |
723 | _cpp_push_token_context (pfile, NULL, lhs, 1); | |
79bd622b | 724 | } |
725 | ||
06025647 | 726 | /* Returns TRUE if the number of arguments ARGC supplied in an |
727 | invocation of the MACRO referenced by NODE is valid. An empty | |
728 | invocation to a macro with no parameters should pass ARGC as zero. | |
729 | ||
730 | Note that MACRO cannot necessarily be deduced from NODE, in case | |
731 | NODE was redefined whilst collecting arguments. */ | |
732 | bool | |
f7fdd7a1 | 733 | _cpp_arguments_ok (cpp_reader *pfile, cpp_macro *macro, const cpp_hashnode *node, unsigned int argc) |
06025647 | 734 | { |
735 | if (argc == macro->paramc) | |
736 | return true; | |
737 | ||
738 | if (argc < macro->paramc) | |
739 | { | |
49f161b6 | 740 | /* As an extension, variadic arguments are allowed to not appear in |
06025647 | 741 | the invocation at all. |
742 | e.g. #define debug(format, args...) something | |
743 | debug("string"); | |
744 | ||
49f161b6 | 745 | This is exactly the same as if an empty variadic list had been |
746 | supplied - debug("string", ). */ | |
06025647 | 747 | |
748 | if (argc + 1 == macro->paramc && macro->variadic) | |
749 | { | |
750 | if (CPP_PEDANTIC (pfile) && ! macro->syshdr) | |
49f161b6 | 751 | { |
752 | if (CPP_OPTION (pfile, cplusplus)) | |
753 | cpp_error (pfile, CPP_DL_PEDWARN, | |
754 | "ISO C++11 requires at least one argument " | |
755 | "for the \"...\" in a variadic macro"); | |
756 | else | |
757 | cpp_error (pfile, CPP_DL_PEDWARN, | |
758 | "ISO C99 requires at least one argument " | |
759 | "for the \"...\" in a variadic macro"); | |
760 | } | |
06025647 | 761 | return true; |
762 | } | |
763 | ||
d80d2074 | 764 | cpp_error (pfile, CPP_DL_ERROR, |
06025647 | 765 | "macro \"%s\" requires %u arguments, but only %u given", |
766 | NODE_NAME (node), macro->paramc, argc); | |
767 | } | |
768 | else | |
d80d2074 | 769 | cpp_error (pfile, CPP_DL_ERROR, |
06025647 | 770 | "macro \"%s\" passed %u arguments, but takes just %u", |
771 | NODE_NAME (node), argc, macro->paramc); | |
772 | ||
773 | return false; | |
774 | } | |
775 | ||
88cf66fa | 776 | /* Reads and returns the arguments to a function-like macro |
777 | invocation. Assumes the opening parenthesis has been processed. | |
778 | If there is an error, emits an appropriate diagnostic and returns | |
779 | NULL. Each argument is terminated by a CPP_EOF token, for the | |
45f9f140 | 780 | future benefit of expand_arg(). If there are any deferred |
781 | #pragma directives among macro arguments, store pointers to the | |
ce70f433 | 782 | CPP_PRAGMA ... CPP_PRAGMA_EOL tokens into *PRAGMA_BUFF buffer. |
783 | ||
784 | What is returned is the buffer that contains the memory allocated | |
785 | to hold the macro arguments. NODE is the name of the macro this | |
786 | function is dealing with. If NUM_ARGS is non-NULL, *NUM_ARGS is | |
787 | set to the actual number of macro arguments allocated in the | |
788 | returned buffer. */ | |
06c92cbc | 789 | static _cpp_buff * |
45f9f140 | 790 | collect_args (cpp_reader *pfile, const cpp_hashnode *node, |
ce70f433 | 791 | _cpp_buff **pragma_buff, unsigned *num_args) |
79bd622b | 792 | { |
06c92cbc | 793 | _cpp_buff *buff, *base_buff; |
794 | cpp_macro *macro; | |
795 | macro_arg *args, *arg; | |
796 | const cpp_token *token; | |
797 | unsigned int argc; | |
ce70f433 | 798 | source_location virt_loc; |
799 | bool track_macro_expansion_p = CPP_OPTION (pfile, track_macro_expansion); | |
800 | unsigned num_args_alloced = 0; | |
06c92cbc | 801 | |
802 | macro = node->value.macro; | |
803 | if (macro->paramc) | |
804 | argc = macro->paramc; | |
805 | else | |
806 | argc = 1; | |
ce70f433 | 807 | |
808 | #define DEFAULT_NUM_TOKENS_PER_MACRO_ARG 50 | |
809 | #define ARG_TOKENS_EXTENT 1000 | |
810 | ||
811 | buff = _cpp_get_buff (pfile, argc * (DEFAULT_NUM_TOKENS_PER_MACRO_ARG | |
812 | * sizeof (cpp_token *) | |
06c92cbc | 813 | + sizeof (macro_arg))); |
814 | base_buff = buff; | |
815 | args = (macro_arg *) buff->base; | |
816 | memset (args, 0, argc * sizeof (macro_arg)); | |
1fdf6039 | 817 | buff->cur = (unsigned char *) &args[argc]; |
06c92cbc | 818 | arg = args, argc = 0; |
819 | ||
820 | /* Collect the tokens making up each argument. We don't yet know | |
821 | how many arguments have been supplied, whether too many or too | |
822 | few. Hence the slightly bizarre usage of "argc" and "arg". */ | |
823 | do | |
79bd622b | 824 | { |
06c92cbc | 825 | unsigned int paren_depth = 0; |
826 | unsigned int ntokens = 0; | |
ce70f433 | 827 | unsigned virt_locs_capacity = DEFAULT_NUM_TOKENS_PER_MACRO_ARG; |
828 | num_args_alloced++; | |
79bd622b | 829 | |
06c92cbc | 830 | argc++; |
831 | arg->first = (const cpp_token **) buff->cur; | |
ce70f433 | 832 | if (track_macro_expansion_p) |
833 | { | |
834 | virt_locs_capacity = DEFAULT_NUM_TOKENS_PER_MACRO_ARG; | |
835 | arg->virt_locs = XNEWVEC (source_location, | |
836 | virt_locs_capacity); | |
837 | } | |
69461e0d | 838 | |
06c92cbc | 839 | for (;;) |
840 | { | |
841 | /* Require space for 2 new tokens (including a CPP_EOF). */ | |
1fdf6039 | 842 | if ((unsigned char *) &arg->first[ntokens + 2] > buff->limit) |
06c92cbc | 843 | { |
e6a5f963 | 844 | buff = _cpp_append_extend_buff (pfile, buff, |
ce70f433 | 845 | ARG_TOKENS_EXTENT |
846 | * sizeof (cpp_token *)); | |
06c92cbc | 847 | arg->first = (const cpp_token **) buff->cur; |
848 | } | |
ce70f433 | 849 | if (track_macro_expansion_p |
850 | && (ntokens + 2 > virt_locs_capacity)) | |
851 | { | |
852 | virt_locs_capacity += ARG_TOKENS_EXTENT; | |
853 | arg->virt_locs = XRESIZEVEC (source_location, | |
854 | arg->virt_locs, | |
855 | virt_locs_capacity); | |
856 | } | |
f9b5f742 | 857 | |
ce70f433 | 858 | token = cpp_get_token_1 (pfile, &virt_loc); |
69461e0d | 859 | |
06c92cbc | 860 | if (token->type == CPP_PADDING) |
861 | { | |
862 | /* Drop leading padding. */ | |
863 | if (ntokens == 0) | |
864 | continue; | |
865 | } | |
866 | else if (token->type == CPP_OPEN_PAREN) | |
867 | paren_depth++; | |
868 | else if (token->type == CPP_CLOSE_PAREN) | |
869 | { | |
870 | if (paren_depth-- == 0) | |
871 | break; | |
872 | } | |
873 | else if (token->type == CPP_COMMA) | |
874 | { | |
875 | /* A comma does not terminate an argument within | |
876 | parentheses or as part of a variable argument. */ | |
877 | if (paren_depth == 0 | |
878 | && ! (macro->variadic && argc == macro->paramc)) | |
879 | break; | |
880 | } | |
881 | else if (token->type == CPP_EOF | |
882 | || (token->type == CPP_HASH && token->flags & BOL)) | |
883 | break; | |
45f9f140 | 884 | else if (token->type == CPP_PRAGMA) |
885 | { | |
886 | cpp_token *newtok = _cpp_temp_token (pfile); | |
887 | ||
888 | /* CPP_PRAGMA token lives in directive_result, which will | |
889 | be overwritten on the next directive. */ | |
890 | *newtok = *token; | |
891 | token = newtok; | |
892 | do | |
893 | { | |
894 | if (*pragma_buff == NULL | |
895 | || BUFF_ROOM (*pragma_buff) < sizeof (cpp_token *)) | |
896 | { | |
897 | _cpp_buff *next; | |
898 | if (*pragma_buff == NULL) | |
899 | *pragma_buff | |
900 | = _cpp_get_buff (pfile, 32 * sizeof (cpp_token *)); | |
901 | else | |
902 | { | |
903 | next = *pragma_buff; | |
904 | *pragma_buff | |
905 | = _cpp_get_buff (pfile, | |
906 | (BUFF_FRONT (*pragma_buff) | |
907 | - (*pragma_buff)->base) * 2); | |
908 | (*pragma_buff)->next = next; | |
909 | } | |
910 | } | |
911 | *(const cpp_token **) BUFF_FRONT (*pragma_buff) = token; | |
912 | BUFF_FRONT (*pragma_buff) += sizeof (cpp_token *); | |
913 | if (token->type == CPP_PRAGMA_EOL) | |
914 | break; | |
ce70f433 | 915 | token = cpp_get_token_1 (pfile, &virt_loc); |
45f9f140 | 916 | } |
917 | while (token->type != CPP_EOF); | |
918 | ||
919 | /* In deferred pragmas parsing_args and prevent_expansion | |
920 | had been changed, reset it. */ | |
921 | pfile->state.parsing_args = 2; | |
922 | pfile->state.prevent_expansion = 1; | |
923 | ||
924 | if (token->type == CPP_EOF) | |
925 | break; | |
926 | else | |
927 | continue; | |
928 | } | |
ce70f433 | 929 | set_arg_token (arg, token, virt_loc, |
930 | ntokens, MACRO_ARG_TOKEN_NORMAL, | |
931 | CPP_OPTION (pfile, track_macro_expansion)); | |
932 | ntokens++; | |
06c92cbc | 933 | } |
79bd622b | 934 | |
06c92cbc | 935 | /* Drop trailing padding. */ |
936 | while (ntokens > 0 && arg->first[ntokens - 1]->type == CPP_PADDING) | |
937 | ntokens--; | |
79bd622b | 938 | |
06c92cbc | 939 | arg->count = ntokens; |
ce70f433 | 940 | set_arg_token (arg, &pfile->eof, pfile->eof.src_loc, |
941 | ntokens, MACRO_ARG_TOKEN_NORMAL, | |
942 | CPP_OPTION (pfile, track_macro_expansion)); | |
79bd622b | 943 | |
06c92cbc | 944 | /* Terminate the argument. Excess arguments loop back and |
945 | overwrite the final legitimate argument, before failing. */ | |
946 | if (argc <= macro->paramc) | |
947 | { | |
1fdf6039 | 948 | buff->cur = (unsigned char *) &arg->first[ntokens + 1]; |
06c92cbc | 949 | if (argc != macro->paramc) |
950 | arg++; | |
951 | } | |
79bd622b | 952 | } |
d6af0368 | 953 | while (token->type != CPP_CLOSE_PAREN && token->type != CPP_EOF); |
79bd622b | 954 | |
d6af0368 | 955 | if (token->type == CPP_EOF) |
79bd622b | 956 | { |
1fdf6039 | 957 | /* We still need the CPP_EOF to end directives, and to end |
958 | pre-expansion of a macro argument. Step back is not | |
959 | unconditional, since we don't want to return a CPP_EOF to our | |
960 | callers at the end of an -include-d file. */ | |
d6af0368 | 961 | if (pfile->context->prev || pfile->state.in_directive) |
06c92cbc | 962 | _cpp_backup_tokens (pfile, 1); |
d80d2074 | 963 | cpp_error (pfile, CPP_DL_ERROR, |
73328dce | 964 | "unterminated argument list invoking macro \"%s\"", |
c86dbc5b | 965 | NODE_NAME (node)); |
79bd622b | 966 | } |
06025647 | 967 | else |
79bd622b | 968 | { |
06025647 | 969 | /* A single empty argument is counted as no argument. */ |
970 | if (argc == 1 && macro->paramc == 0 && args[0].count == 0) | |
971 | argc = 0; | |
972 | if (_cpp_arguments_ok (pfile, macro, node, argc)) | |
ed909a09 | 973 | { |
974 | /* GCC has special semantics for , ## b where b is a varargs | |
975 | parameter: we remove the comma if b was omitted entirely. | |
976 | If b was merely an empty argument, the comma is retained. | |
977 | If the macro takes just one (varargs) parameter, then we | |
978 | retain the comma only if we are standards conforming. | |
979 | ||
980 | If FIRST is NULL replace_args () swallows the comma. */ | |
981 | if (macro->variadic && (argc < macro->paramc | |
982 | || (argc == 1 && args[0].count == 0 | |
983 | && !CPP_OPTION (pfile, std)))) | |
984 | args[macro->paramc - 1].first = NULL; | |
ce70f433 | 985 | if (num_args) |
986 | *num_args = num_args_alloced; | |
ed909a09 | 987 | return base_buff; |
988 | } | |
79bd622b | 989 | } |
990 | ||
06025647 | 991 | /* An error occurred. */ |
06c92cbc | 992 | _cpp_release_buff (pfile, base_buff); |
993 | return NULL; | |
79bd622b | 994 | } |
995 | ||
2b0e25fe | 996 | /* Search for an opening parenthesis to the macro of NODE, in such a |
997 | way that, if none is found, we don't lose the information in any | |
998 | intervening padding tokens. If we find the parenthesis, collect | |
45f9f140 | 999 | the arguments and return the buffer containing them. PRAGMA_BUFF |
ce70f433 | 1000 | argument is the same as in collect_args. If NUM_ARGS is non-NULL, |
1001 | *NUM_ARGS is set to the number of arguments contained in the | |
1002 | returned buffer. */ | |
2b0e25fe | 1003 | static _cpp_buff * |
45f9f140 | 1004 | funlike_invocation_p (cpp_reader *pfile, cpp_hashnode *node, |
ce70f433 | 1005 | _cpp_buff **pragma_buff, unsigned *num_args) |
79bd622b | 1006 | { |
2b0e25fe | 1007 | const cpp_token *token, *padding = NULL; |
f9b5f742 | 1008 | |
2b0e25fe | 1009 | for (;;) |
fb5ab82c | 1010 | { |
2b0e25fe | 1011 | token = cpp_get_token (pfile); |
1012 | if (token->type != CPP_PADDING) | |
1013 | break; | |
1014 | if (padding == NULL | |
1015 | || (!(padding->flags & PREV_WHITE) && token->val.source == NULL)) | |
1016 | padding = token; | |
fb5ab82c | 1017 | } |
79bd622b | 1018 | |
2b0e25fe | 1019 | if (token->type == CPP_OPEN_PAREN) |
79bd622b | 1020 | { |
2b0e25fe | 1021 | pfile->state.parsing_args = 2; |
ce70f433 | 1022 | return collect_args (pfile, node, pragma_buff, num_args); |
79bd622b | 1023 | } |
1024 | ||
7e2fc40e | 1025 | /* CPP_EOF can be the end of macro arguments, or the end of the |
1026 | file. We mustn't back up over the latter. Ugh. */ | |
1027 | if (token->type != CPP_EOF || token == &pfile->eof) | |
1028 | { | |
1029 | /* Back up. We may have skipped padding, in which case backing | |
1030 | up more than one token when expanding macros is in general | |
1031 | too difficult. We re-insert it in its own context. */ | |
1032 | _cpp_backup_tokens (pfile, 1); | |
1033 | if (padding) | |
b75b98aa | 1034 | _cpp_push_token_context (pfile, NULL, padding, 1); |
7e2fc40e | 1035 | } |
2b0e25fe | 1036 | |
1037 | return NULL; | |
79bd622b | 1038 | } |
1039 | ||
941f2388 | 1040 | /* Return the real number of tokens in the expansion of MACRO. */ |
1041 | static inline unsigned int | |
1042 | macro_real_token_count (const cpp_macro *macro) | |
1043 | { | |
1044 | unsigned int i; | |
1045 | if (__builtin_expect (!macro->extra_tokens, true)) | |
1046 | return macro->count; | |
1047 | for (i = 0; i < macro->count; i++) | |
1048 | if (macro->exp.tokens[i].type == CPP_PASTE) | |
1049 | return i; | |
1050 | abort (); | |
1051 | } | |
1052 | ||
88cf66fa | 1053 | /* Push the context of a macro with hash entry NODE onto the context |
1054 | stack. If we can successfully expand the macro, we push a context | |
1055 | containing its yet-to-be-rescanned replacement list and return one. | |
ce70f433 | 1056 | If there were additionally any unexpanded deferred #pragma |
1057 | directives among macro arguments, push another context containing | |
1058 | the pragma tokens before the yet-to-be-rescanned replacement list | |
1059 | and return two. Otherwise, we don't push a context and return | |
1060 | zero. LOCATION is the location of the expansion point of the | |
1061 | macro. */ | |
69461e0d | 1062 | static int |
45f9f140 | 1063 | enter_macro_context (cpp_reader *pfile, cpp_hashnode *node, |
ce70f433 | 1064 | const cpp_token *result, source_location location) |
69461e0d | 1065 | { |
88cf66fa | 1066 | /* The presence of a macro invalidates a file's controlling macro. */ |
c7e5d924 | 1067 | pfile->mi_valid = false; |
1068 | ||
606942e3 | 1069 | pfile->state.angled_headers = false; |
1070 | ||
8c6425eb | 1071 | /* From here to when we push the context for the macro later down |
1072 | this function, we need to flag the fact that we are about to | |
1073 | expand a macro. This is useful when -ftrack-macro-expansion is | |
1074 | turned off. In that case, we need to record the location of the | |
1075 | expansion point of the top-most macro we are about to to expand, | |
1076 | into pfile->invocation_location. But we must not record any such | |
1077 | location once the process of expanding the macro starts; that is, | |
1078 | we must not do that recording between now and later down this | |
1079 | function where set this flag to FALSE. */ | |
1080 | pfile->about_to_expand_macro_p = true; | |
1081 | ||
34c3de48 | 1082 | if ((node->flags & NODE_BUILTIN) && !(node->flags & NODE_USED)) |
1083 | { | |
1084 | node->flags |= NODE_USED; | |
25692381 | 1085 | if ((!pfile->cb.user_builtin_macro |
1086 | || !pfile->cb.user_builtin_macro (pfile, node)) | |
1087 | && pfile->cb.used_define) | |
34c3de48 | 1088 | pfile->cb.used_define (pfile, pfile->directive_line, node); |
1089 | } | |
1090 | ||
88cf66fa | 1091 | /* Handle standard macros. */ |
c7e5d924 | 1092 | if (! (node->flags & NODE_BUILTIN)) |
69461e0d | 1093 | { |
f9b5f742 | 1094 | cpp_macro *macro = node->value.macro; |
45f9f140 | 1095 | _cpp_buff *pragma_buff = NULL; |
3c7df4d3 | 1096 | |
2b0e25fe | 1097 | if (macro->fun_like) |
1098 | { | |
1099 | _cpp_buff *buff; | |
ce70f433 | 1100 | unsigned num_args = 0; |
2b0e25fe | 1101 | |
1102 | pfile->state.prevent_expansion++; | |
1103 | pfile->keep_tokens++; | |
1104 | pfile->state.parsing_args = 1; | |
ce70f433 | 1105 | buff = funlike_invocation_p (pfile, node, &pragma_buff, |
1106 | &num_args); | |
2b0e25fe | 1107 | pfile->state.parsing_args = 0; |
1108 | pfile->keep_tokens--; | |
1109 | pfile->state.prevent_expansion--; | |
1110 | ||
1111 | if (buff == NULL) | |
1112 | { | |
1113 | if (CPP_WTRADITIONAL (pfile) && ! node->value.macro->syshdr) | |
3a79f5da | 1114 | cpp_warning (pfile, CPP_W_TRADITIONAL, |
2b0e25fe | 1115 | "function-like macro \"%s\" must be used with arguments in traditional C", |
3a79f5da | 1116 | NODE_NAME (node)); |
2b0e25fe | 1117 | |
45f9f140 | 1118 | if (pragma_buff) |
1119 | _cpp_release_buff (pfile, pragma_buff); | |
1120 | ||
8c6425eb | 1121 | pfile->about_to_expand_macro_p = false; |
2b0e25fe | 1122 | return 0; |
1123 | } | |
1124 | ||
d6af0368 | 1125 | if (macro->paramc > 0) |
ce70f433 | 1126 | replace_args (pfile, node, macro, |
1127 | (macro_arg *) buff->base, | |
1128 | location); | |
1129 | /* Free the memory used by the arguments of this | |
1130 | function-like macro. This memory has been allocated by | |
1131 | funlike_invocation_p and by replace_args. */ | |
1132 | delete_macro_args (buff, num_args); | |
2b0e25fe | 1133 | } |
79bd622b | 1134 | |
f9b5f742 | 1135 | /* Disable the macro within its expansion. */ |
c7e5d924 | 1136 | node->flags |= NODE_DISABLED; |
79bd622b | 1137 | |
34c3de48 | 1138 | if (!(node->flags & NODE_USED)) |
1139 | { | |
1140 | node->flags |= NODE_USED; | |
1141 | if (pfile->cb.used_define) | |
1142 | pfile->cb.used_define (pfile, pfile->directive_line, node); | |
1143 | } | |
1144 | ||
116f0a5f | 1145 | if (pfile->cb.used) |
ce70f433 | 1146 | pfile->cb.used (pfile, location, node); |
116f0a5f | 1147 | |
71a7c282 | 1148 | macro->used = 1; |
1149 | ||
f9b5f742 | 1150 | if (macro->paramc == 0) |
ce70f433 | 1151 | { |
9b48364f | 1152 | unsigned tokens_count = macro_real_token_count (macro); |
ce70f433 | 1153 | if (CPP_OPTION (pfile, track_macro_expansion)) |
1154 | { | |
9b48364f | 1155 | unsigned int i; |
ce70f433 | 1156 | const cpp_token *src = macro->exp.tokens; |
1157 | const struct line_map *map; | |
1158 | source_location *virt_locs = NULL; | |
9b48364f | 1159 | _cpp_buff *macro_tokens |
1160 | = tokens_buff_new (pfile, tokens_count, &virt_locs); | |
ce70f433 | 1161 | |
1162 | /* Create a macro map to record the locations of the | |
1163 | tokens that are involved in the expansion. LOCATION | |
1164 | is the location of the macro expansion point. */ | |
9b48364f | 1165 | map = linemap_enter_macro (pfile->line_table, |
1166 | node, location, tokens_count); | |
1167 | for (i = 0; i < tokens_count; ++i) | |
ce70f433 | 1168 | { |
1169 | tokens_buff_add_token (macro_tokens, virt_locs, | |
1170 | src, src->src_loc, | |
1171 | src->src_loc, map, i); | |
1172 | ++src; | |
1173 | } | |
1174 | push_extended_tokens_context (pfile, node, | |
1175 | macro_tokens, | |
1176 | virt_locs, | |
1177 | (const cpp_token **) | |
1178 | macro_tokens->base, | |
9b48364f | 1179 | tokens_count); |
ce70f433 | 1180 | } |
1181 | else | |
9b48364f | 1182 | _cpp_push_token_context (pfile, node, macro->exp.tokens, |
1183 | tokens_count); | |
1184 | num_macro_tokens_counter += tokens_count; | |
ce70f433 | 1185 | } |
c7e5d924 | 1186 | |
45f9f140 | 1187 | if (pragma_buff) |
1188 | { | |
1189 | if (!pfile->state.in_directive) | |
1190 | _cpp_push_token_context (pfile, NULL, | |
1191 | padding_token (pfile, result), 1); | |
1192 | do | |
1193 | { | |
e77b8253 | 1194 | unsigned tokens_count; |
45f9f140 | 1195 | _cpp_buff *tail = pragma_buff->next; |
1196 | pragma_buff->next = NULL; | |
e77b8253 | 1197 | tokens_count = ((const cpp_token **) BUFF_FRONT (pragma_buff) |
1198 | - (const cpp_token **) pragma_buff->base); | |
45f9f140 | 1199 | push_ptoken_context (pfile, NULL, pragma_buff, |
1200 | (const cpp_token **) pragma_buff->base, | |
e77b8253 | 1201 | tokens_count); |
45f9f140 | 1202 | pragma_buff = tail; |
e77b8253 | 1203 | if (!CPP_OPTION (pfile, track_macro_expansion)) |
1204 | num_macro_tokens_counter += tokens_count; | |
1205 | ||
45f9f140 | 1206 | } |
1207 | while (pragma_buff != NULL); | |
8c6425eb | 1208 | pfile->about_to_expand_macro_p = false; |
45f9f140 | 1209 | return 2; |
1210 | } | |
1211 | ||
8c6425eb | 1212 | pfile->about_to_expand_macro_p = false; |
c7e5d924 | 1213 | return 1; |
69461e0d | 1214 | } |
c7e5d924 | 1215 | |
8c6425eb | 1216 | pfile->about_to_expand_macro_p = false; |
88cf66fa | 1217 | /* Handle built-in macros and the _Pragma operator. */ |
2e82cf2c | 1218 | return builtin_macro (pfile, node, location); |
79bd622b | 1219 | } |
1220 | ||
ce70f433 | 1221 | /* De-allocate the memory used by BUFF which is an array of instances |
1222 | of macro_arg. NUM_ARGS is the number of instances of macro_arg | |
1223 | present in BUFF. */ | |
1224 | static void | |
1225 | delete_macro_args (_cpp_buff *buff, unsigned num_args) | |
1226 | { | |
1227 | macro_arg *macro_args; | |
1228 | unsigned i; | |
1229 | ||
1230 | if (buff == NULL) | |
1231 | return; | |
1232 | ||
1233 | macro_args = (macro_arg *) buff->base; | |
1234 | ||
1235 | /* Walk instances of macro_arg to free their expanded tokens as well | |
1236 | as their macro_arg::virt_locs members. */ | |
1237 | for (i = 0; i < num_args; ++i) | |
1238 | { | |
1239 | if (macro_args[i].expanded) | |
1240 | { | |
1241 | free (macro_args[i].expanded); | |
1242 | macro_args[i].expanded = NULL; | |
1243 | } | |
1244 | if (macro_args[i].virt_locs) | |
1245 | { | |
1246 | free (macro_args[i].virt_locs); | |
1247 | macro_args[i].virt_locs = NULL; | |
1248 | } | |
1249 | if (macro_args[i].expanded_virt_locs) | |
1250 | { | |
1251 | free (macro_args[i].expanded_virt_locs); | |
1252 | macro_args[i].expanded_virt_locs = NULL; | |
1253 | } | |
1254 | } | |
1255 | _cpp_free_buff (buff); | |
1256 | } | |
1257 | ||
1258 | /* Set the INDEXth token of the macro argument ARG. TOKEN is the token | |
1259 | to set, LOCATION is its virtual location. "Virtual" location means | |
e8aa7eaf | 1260 | the location that encodes loci across macro expansion. Otherwise |
ce70f433 | 1261 | it has to be TOKEN->SRC_LOC. KIND is the kind of tokens the |
1262 | argument ARG is supposed to contain. Note that ARG must be | |
1263 | tailored so that it has enough room to contain INDEX + 1 numbers of | |
1264 | tokens, at least. */ | |
1265 | static void | |
1266 | set_arg_token (macro_arg *arg, const cpp_token *token, | |
1267 | source_location location, size_t index, | |
1268 | enum macro_arg_token_kind kind, | |
1269 | bool track_macro_exp_p) | |
1270 | { | |
1271 | const cpp_token **token_ptr; | |
1272 | source_location *loc = NULL; | |
1273 | ||
1274 | token_ptr = | |
1275 | arg_token_ptr_at (arg, index, kind, | |
1276 | track_macro_exp_p ? &loc : NULL); | |
1277 | *token_ptr = token; | |
1278 | ||
1279 | if (loc != NULL) | |
1280 | { | |
1281 | #ifdef ENABLE_CHECKING | |
1282 | if (kind == MACRO_ARG_TOKEN_STRINGIFIED | |
1283 | || !track_macro_exp_p) | |
1284 | /* We can't set the location of a stringified argument | |
1285 | token and we can't set any location if we aren't tracking | |
1286 | macro expansion locations. */ | |
1287 | abort (); | |
1288 | #endif | |
1289 | *loc = location; | |
1290 | } | |
1291 | } | |
1292 | ||
1293 | /* Get the pointer to the location of the argument token of the | |
1294 | function-like macro argument ARG. This function must be called | |
1295 | only when we -ftrack-macro-expansion is on. */ | |
1296 | static const source_location * | |
1297 | get_arg_token_location (const macro_arg *arg, | |
1298 | enum macro_arg_token_kind kind) | |
1299 | { | |
1300 | const source_location *loc = NULL; | |
1301 | const cpp_token **token_ptr = | |
1302 | arg_token_ptr_at (arg, 0, kind, (source_location **) &loc); | |
1303 | ||
1304 | if (token_ptr == NULL) | |
1305 | return NULL; | |
1306 | ||
1307 | return loc; | |
1308 | } | |
1309 | ||
1310 | /* Return the pointer to the INDEXth token of the macro argument ARG. | |
1311 | KIND specifies the kind of token the macro argument ARG contains. | |
1312 | If VIRT_LOCATION is non NULL, *VIRT_LOCATION is set to the address | |
1313 | of the virtual location of the returned token if the | |
1314 | -ftrack-macro-expansion flag is on; otherwise, it's set to the | |
1315 | spelling location of the returned token. */ | |
1316 | static const cpp_token ** | |
1317 | arg_token_ptr_at (const macro_arg *arg, size_t index, | |
1318 | enum macro_arg_token_kind kind, | |
1319 | source_location **virt_location) | |
1320 | { | |
1321 | const cpp_token **tokens_ptr = NULL; | |
1322 | ||
1323 | switch (kind) | |
1324 | { | |
1325 | case MACRO_ARG_TOKEN_NORMAL: | |
1326 | tokens_ptr = arg->first; | |
1327 | break; | |
1328 | case MACRO_ARG_TOKEN_STRINGIFIED: | |
1329 | tokens_ptr = (const cpp_token **) &arg->stringified; | |
1330 | break; | |
1331 | case MACRO_ARG_TOKEN_EXPANDED: | |
1332 | tokens_ptr = arg->expanded; | |
1333 | break; | |
1334 | } | |
1335 | ||
1336 | if (tokens_ptr == NULL) | |
1337 | /* This can happen for e.g, an empty token argument to a | |
1338 | funtion-like macro. */ | |
1339 | return tokens_ptr; | |
1340 | ||
1341 | if (virt_location) | |
1342 | { | |
1343 | if (kind == MACRO_ARG_TOKEN_NORMAL) | |
1344 | *virt_location = &arg->virt_locs[index]; | |
1345 | else if (kind == MACRO_ARG_TOKEN_EXPANDED) | |
1346 | *virt_location = &arg->expanded_virt_locs[index]; | |
1347 | else if (kind == MACRO_ARG_TOKEN_STRINGIFIED) | |
1348 | *virt_location = | |
1349 | (source_location *) &tokens_ptr[index]->src_loc; | |
1350 | } | |
1351 | return &tokens_ptr[index]; | |
1352 | } | |
1353 | ||
1354 | /* Initialize an iterator so that it iterates over the tokens of a | |
1355 | function-like macro argument. KIND is the kind of tokens we want | |
1356 | ITER to iterate over. TOKEN_PTR points the first token ITER will | |
1357 | iterate over. */ | |
1358 | static void | |
1359 | macro_arg_token_iter_init (macro_arg_token_iter *iter, | |
1360 | bool track_macro_exp_p, | |
1361 | enum macro_arg_token_kind kind, | |
1362 | const macro_arg *arg, | |
1363 | const cpp_token **token_ptr) | |
1364 | { | |
1365 | iter->track_macro_exp_p = track_macro_exp_p; | |
1366 | iter->kind = kind; | |
1367 | iter->token_ptr = token_ptr; | |
2a688977 | 1368 | /* Unconditionally initialize this so that the compiler doesn't warn |
1369 | about iter->location_ptr being possibly uninitialized later after | |
1370 | this code has been inlined somewhere. */ | |
1371 | iter->location_ptr = NULL; | |
ce70f433 | 1372 | if (track_macro_exp_p) |
1373 | iter->location_ptr = get_arg_token_location (arg, kind); | |
1374 | #ifdef ENABLE_CHECKING | |
1375 | iter->num_forwards = 0; | |
1376 | if (track_macro_exp_p | |
1377 | && token_ptr != NULL | |
1378 | && iter->location_ptr == NULL) | |
1379 | abort (); | |
1380 | #endif | |
1381 | } | |
1382 | ||
1383 | /* Move the iterator one token forward. Note that if IT was | |
1384 | initialized on an argument that has a stringified token, moving it | |
e8aa7eaf | 1385 | forward doesn't make sense as a stringified token is essentially one |
ce70f433 | 1386 | string. */ |
1387 | static void | |
1388 | macro_arg_token_iter_forward (macro_arg_token_iter *it) | |
1389 | { | |
1390 | switch (it->kind) | |
1391 | { | |
1392 | case MACRO_ARG_TOKEN_NORMAL: | |
1393 | case MACRO_ARG_TOKEN_EXPANDED: | |
1394 | it->token_ptr++; | |
1395 | if (it->track_macro_exp_p) | |
1396 | it->location_ptr++; | |
1397 | break; | |
1398 | case MACRO_ARG_TOKEN_STRINGIFIED: | |
1399 | #ifdef ENABLE_CHECKING | |
1400 | if (it->num_forwards > 0) | |
1401 | abort (); | |
1402 | #endif | |
1403 | break; | |
1404 | } | |
1405 | ||
1406 | #ifdef ENABLE_CHECKING | |
1407 | it->num_forwards++; | |
1408 | #endif | |
1409 | } | |
1410 | ||
1411 | /* Return the token pointed to by the iterator. */ | |
1412 | static const cpp_token * | |
1413 | macro_arg_token_iter_get_token (const macro_arg_token_iter *it) | |
1414 | { | |
1415 | #ifdef ENABLE_CHECKING | |
1416 | if (it->kind == MACRO_ARG_TOKEN_STRINGIFIED | |
1417 | && it->num_forwards > 0) | |
1418 | abort (); | |
1419 | #endif | |
1420 | if (it->token_ptr == NULL) | |
1421 | return NULL; | |
1422 | return *it->token_ptr; | |
1423 | } | |
1424 | ||
1425 | /* Return the location of the token pointed to by the iterator.*/ | |
1426 | static source_location | |
1427 | macro_arg_token_iter_get_location (const macro_arg_token_iter *it) | |
1428 | { | |
1429 | #ifdef ENABLE_CHECKING | |
1430 | if (it->kind == MACRO_ARG_TOKEN_STRINGIFIED | |
1431 | && it->num_forwards > 0) | |
1432 | abort (); | |
1433 | #endif | |
1434 | if (it->track_macro_exp_p) | |
1435 | return *it->location_ptr; | |
1436 | else | |
1437 | return (*it->token_ptr)->src_loc; | |
1438 | } | |
1439 | ||
1440 | /* Return the index of a token [resulting from macro expansion] inside | |
1441 | the total list of tokens resulting from a given macro | |
1442 | expansion. The index can be different depending on whether if we | |
1443 | want each tokens resulting from function-like macro arguments | |
1444 | expansion to have a different location or not. | |
1445 | ||
1446 | E.g, consider this function-like macro: | |
1447 | ||
1448 | #define M(x) x - 3 | |
1449 | ||
1450 | Then consider us "calling" it (and thus expanding it) like: | |
1451 | ||
1452 | M(1+4) | |
1453 | ||
1454 | It will be expanded into: | |
1455 | ||
1456 | 1+4-3 | |
1457 | ||
1458 | Let's consider the case of the token '4'. | |
1459 | ||
1460 | Its index can be 2 (it's the third token of the set of tokens | |
1461 | resulting from the expansion) or it can be 0 if we consider that | |
1462 | all tokens resulting from the expansion of the argument "1+2" have | |
1463 | the same index, which is 0. In this later case, the index of token | |
1464 | '-' would then be 1 and the index of token '3' would be 2. | |
1465 | ||
1466 | The later case is useful to use less memory e.g, for the case of | |
1467 | the user using the option -ftrack-macro-expansion=1. | |
1468 | ||
1469 | ABSOLUTE_TOKEN_INDEX is the index of the macro argument token we | |
1470 | are interested in. CUR_REPLACEMENT_TOKEN is the token of the macro | |
1471 | parameter (inside the macro replacement list) that corresponds to | |
1472 | the macro argument for which ABSOLUTE_TOKEN_INDEX is a token index | |
1473 | of. | |
1474 | ||
1475 | If we refer to the example above, for the '4' argument token, | |
1476 | ABSOLUTE_TOKEN_INDEX would be set to 2, and CUR_REPLACEMENT_TOKEN | |
1477 | would be set to the token 'x', in the replacement list "x - 3" of | |
1478 | macro M. | |
1479 | ||
1480 | This is a subroutine of replace_args. */ | |
1481 | inline static unsigned | |
1482 | expanded_token_index (cpp_reader *pfile, cpp_macro *macro, | |
1483 | const cpp_token *cur_replacement_token, | |
1484 | unsigned absolute_token_index) | |
1485 | { | |
1486 | if (CPP_OPTION (pfile, track_macro_expansion) > 1) | |
1487 | return absolute_token_index; | |
1488 | return cur_replacement_token - macro->exp.tokens; | |
1489 | } | |
1490 | ||
88cf66fa | 1491 | /* Replace the parameters in a function-like macro of NODE with the |
1492 | actual ARGS, and place the result in a newly pushed token context. | |
1493 | Expand each argument before replacing, unless it is operated upon | |
ce70f433 | 1494 | by the # or ## operators. EXPANSION_POINT_LOC is the location of |
1495 | the expansion point of the macro. E.g, the location of the | |
1496 | function-like macro invocation. */ | |
79bd622b | 1497 | static void |
ce70f433 | 1498 | replace_args (cpp_reader *pfile, cpp_hashnode *node, cpp_macro *macro, |
1499 | macro_arg *args, source_location expansion_point_loc) | |
79bd622b | 1500 | { |
1501 | unsigned int i, total; | |
1502 | const cpp_token *src, *limit; | |
ce70f433 | 1503 | const cpp_token **first = NULL; |
79bd622b | 1504 | macro_arg *arg; |
ce70f433 | 1505 | _cpp_buff *buff = NULL; |
1506 | source_location *virt_locs = NULL; | |
1507 | unsigned int exp_count; | |
1508 | const struct line_map *map = NULL; | |
1509 | int track_macro_exp; | |
79bd622b | 1510 | |
79bd622b | 1511 | /* First, fully macro-expand arguments, calculating the number of |
084163dc | 1512 | tokens in the final expansion as we go. The ordering of the if |
1513 | statements below is subtle; we must handle stringification before | |
1514 | pasting. */ | |
ce70f433 | 1515 | |
1516 | /* EXP_COUNT is the number of tokens in the macro replacement | |
1517 | list. TOTAL is the number of tokens /after/ macro parameters | |
1518 | have been replaced by their arguments. */ | |
1519 | exp_count = macro_real_token_count (macro); | |
1520 | total = exp_count; | |
1521 | limit = macro->exp.tokens + exp_count; | |
f9b5f742 | 1522 | |
672f38da | 1523 | for (src = macro->exp.tokens; src < limit; src++) |
79bd622b | 1524 | if (src->type == CPP_MACRO_ARG) |
1525 | { | |
f9b5f742 | 1526 | /* Leading and trailing padding tokens. */ |
1527 | total += 2; | |
ce70f433 | 1528 | /* Account for leading and padding tokens in exp_count too. |
1529 | This is going to be important later down this function, | |
1530 | when we want to handle the case of (track_macro_exp < | |
1531 | 2). */ | |
1532 | exp_count += 2; | |
f9b5f742 | 1533 | |
79bd622b | 1534 | /* We have an argument. If it is not being stringified or |
1535 | pasted it is macro-replaced before insertion. */ | |
2ee04baa | 1536 | arg = &args[src->val.macro_arg.arg_no - 1]; |
3c7df4d3 | 1537 | |
79bd622b | 1538 | if (src->flags & STRINGIFY_ARG) |
1539 | { | |
1540 | if (!arg->stringified) | |
f9b5f742 | 1541 | arg->stringified = stringify_arg (pfile, arg); |
79bd622b | 1542 | } |
1543 | else if ((src->flags & PASTE_LEFT) | |
672f38da | 1544 | || (src > macro->exp.tokens && (src[-1].flags & PASTE_LEFT))) |
79bd622b | 1545 | total += arg->count - 1; |
1546 | else | |
1547 | { | |
1548 | if (!arg->expanded) | |
f9b5f742 | 1549 | expand_arg (pfile, arg); |
79bd622b | 1550 | total += arg->expanded_count - 1; |
1551 | } | |
1552 | } | |
1553 | ||
ce70f433 | 1554 | /* When the compiler is called with the -ftrack-macro-expansion |
1555 | flag, we need to keep track of the location of each token that | |
1556 | results from macro expansion. | |
1557 | ||
1558 | A token resulting from macro expansion is not a new token. It is | |
1559 | simply the same token as the token coming from the macro | |
1560 | definition. The new things that are allocated are the buffer | |
1561 | that holds the tokens resulting from macro expansion and a new | |
1562 | location that records many things like the locus of the expansion | |
1563 | point as well as the original locus inside the definition of the | |
1564 | macro. This location is called a virtual location. | |
1565 | ||
1566 | So the buffer BUFF holds a set of cpp_token*, and the buffer | |
1567 | VIRT_LOCS holds the virtual locations of the tokens held by BUFF. | |
1568 | ||
1569 | Both of these two buffers are going to be hung off of the macro | |
1570 | context, when the latter is pushed. The memory allocated to | |
1571 | store the tokens and their locations is going to be freed once | |
1572 | the context of macro expansion is popped. | |
1573 | ||
1574 | As far as tokens are concerned, the memory overhead of | |
1575 | -ftrack-macro-expansion is proportional to the number of | |
1576 | macros that get expanded multiplied by sizeof (source_location). | |
1577 | The good news is that extra memory gets freed when the macro | |
1578 | context is freed, i.e shortly after the macro got expanded. */ | |
1579 | ||
1580 | /* Is the -ftrack-macro-expansion flag in effect? */ | |
1581 | track_macro_exp = CPP_OPTION (pfile, track_macro_expansion); | |
1582 | ||
1583 | /* Now allocate memory space for tokens and locations resulting from | |
1584 | the macro expansion, copy the tokens and replace the arguments. | |
1585 | This memory must be freed when the context of the macro MACRO is | |
1586 | popped. */ | |
1587 | buff = tokens_buff_new (pfile, total, track_macro_exp ? &virt_locs : NULL); | |
1588 | ||
084163dc | 1589 | first = (const cpp_token **) buff->base; |
79bd622b | 1590 | |
ce70f433 | 1591 | /* Create a macro map to record the locations of the tokens that are |
1592 | involved in the expansion. Note that the expansion point is set | |
1593 | to the location of the closing parenthesis. Otherwise, the | |
1594 | subsequent map created for the first token that comes after the | |
1595 | macro map might have a wrong line number. That would lead to | |
1596 | tokens with wrong line numbers after the macro expansion. This | |
1597 | adds up to the memory overhead of the -ftrack-macro-expansion | |
1598 | flag; for every macro that is expanded, a "macro map" is | |
1599 | created. */ | |
1600 | if (track_macro_exp) | |
1601 | { | |
1602 | int num_macro_tokens = total; | |
1603 | if (track_macro_exp < 2) | |
1604 | /* Then the number of macro tokens won't take in account the | |
1605 | fact that function-like macro arguments can expand to | |
1606 | multiple tokens. This is to save memory at the expense of | |
1607 | accuracy. | |
1608 | ||
1609 | Suppose we have #define SQARE(A) A * A | |
1610 | ||
1611 | And then we do SQARE(2+3) | |
1612 | ||
1613 | Then the tokens 2, +, 3, will have the same location, | |
1614 | saying they come from the expansion of the argument A. */ | |
1615 | num_macro_tokens = exp_count; | |
1616 | map = linemap_enter_macro (pfile->line_table, node, | |
1617 | expansion_point_loc, | |
1618 | num_macro_tokens); | |
1619 | } | |
1620 | i = 0; | |
672f38da | 1621 | for (src = macro->exp.tokens; src < limit; src++) |
f9b5f742 | 1622 | { |
ce70f433 | 1623 | unsigned int arg_tokens_count; |
1624 | macro_arg_token_iter from; | |
1625 | const cpp_token **paste_flag = NULL; | |
1626 | const cpp_token **tmp_token_ptr; | |
79bd622b | 1627 | |
f9b5f742 | 1628 | if (src->type != CPP_MACRO_ARG) |
1629 | { | |
ce70f433 | 1630 | /* Allocate a virtual location for token SRC, and add that |
1631 | token and its virtual location into the buffers BUFF and | |
1632 | VIRT_LOCS. */ | |
1633 | unsigned index = expanded_token_index (pfile, macro, src, i); | |
1634 | tokens_buff_add_token (buff, virt_locs, src, | |
1635 | src->src_loc, src->src_loc, | |
1636 | map, index); | |
1637 | i += 1; | |
f9b5f742 | 1638 | continue; |
1639 | } | |
79bd622b | 1640 | |
f9b5f742 | 1641 | paste_flag = 0; |
2ee04baa | 1642 | arg = &args[src->val.macro_arg.arg_no - 1]; |
ce70f433 | 1643 | /* SRC is a macro parameter that we need to replace with its |
1644 | corresponding argument. So at some point we'll need to | |
1645 | iterate over the tokens of the macro argument and copy them | |
1646 | into the "place" now holding the correspondig macro | |
1647 | parameter. We are going to use the iterator type | |
1648 | macro_argo_token_iter to handle that iterating. The 'if' | |
1649 | below is to initialize the iterator depending on the type of | |
1650 | tokens the macro argument has. It also does some adjustment | |
1651 | related to padding tokens and some pasting corner cases. */ | |
f9b5f742 | 1652 | if (src->flags & STRINGIFY_ARG) |
ce70f433 | 1653 | { |
1654 | arg_tokens_count = 1; | |
1655 | macro_arg_token_iter_init (&from, | |
1656 | CPP_OPTION (pfile, | |
1657 | track_macro_expansion), | |
1658 | MACRO_ARG_TOKEN_STRINGIFIED, | |
1659 | arg, &arg->stringified); | |
1660 | } | |
f9b5f742 | 1661 | else if (src->flags & PASTE_LEFT) |
ce70f433 | 1662 | { |
1663 | arg_tokens_count = arg->count; | |
1664 | macro_arg_token_iter_init (&from, | |
1665 | CPP_OPTION (pfile, | |
1666 | track_macro_expansion), | |
1667 | MACRO_ARG_TOKEN_NORMAL, | |
1668 | arg, arg->first); | |
1669 | } | |
672f38da | 1670 | else if (src != macro->exp.tokens && (src[-1].flags & PASTE_LEFT)) |
f9b5f742 | 1671 | { |
ce70f433 | 1672 | int num_toks; |
1673 | arg_tokens_count = arg->count; | |
1674 | macro_arg_token_iter_init (&from, | |
1675 | CPP_OPTION (pfile, | |
1676 | track_macro_expansion), | |
1677 | MACRO_ARG_TOKEN_NORMAL, | |
1678 | arg, arg->first); | |
1679 | ||
1680 | num_toks = tokens_buff_count (buff); | |
1681 | ||
1682 | if (num_toks != 0) | |
f9b5f742 | 1683 | { |
ce70f433 | 1684 | /* So the current parameter token is pasted to the previous |
1685 | token in the replacement list. Let's look at what | |
1686 | we have as previous and current arguments. */ | |
1687 | ||
1688 | /* This is the previous argument's token ... */ | |
1689 | tmp_token_ptr = tokens_buff_last_token_ptr (buff); | |
1690 | ||
1691 | if ((*tmp_token_ptr)->type == CPP_COMMA | |
f9b5f742 | 1692 | && macro->variadic |
2ee04baa | 1693 | && src->val.macro_arg.arg_no == macro->paramc) |
f9b5f742 | 1694 | { |
ce70f433 | 1695 | /* ... which is a comma; and the current parameter |
1696 | is the last parameter of a variadic function-like | |
1697 | macro. If the argument to the current last | |
1698 | parameter is NULL, then swallow the comma, | |
1699 | otherwise drop the paste flag. */ | |
1700 | if (macro_arg_token_iter_get_token (&from) == NULL) | |
1701 | tokens_buff_remove_last_token (buff); | |
f9b5f742 | 1702 | else |
ce70f433 | 1703 | paste_flag = tmp_token_ptr; |
f9b5f742 | 1704 | } |
1705 | /* Remove the paste flag if the RHS is a placemarker. */ | |
ce70f433 | 1706 | else if (arg_tokens_count == 0) |
1707 | paste_flag = tmp_token_ptr; | |
f9b5f742 | 1708 | } |
1709 | } | |
1710 | else | |
ce70f433 | 1711 | { |
1712 | arg_tokens_count = arg->expanded_count; | |
1713 | macro_arg_token_iter_init (&from, | |
1714 | CPP_OPTION (pfile, | |
1715 | track_macro_expansion), | |
1716 | MACRO_ARG_TOKEN_EXPANDED, | |
1717 | arg, arg->expanded); | |
1718 | } | |
3c7df4d3 | 1719 | |
f9b5f742 | 1720 | /* Padding on the left of an argument (unless RHS of ##). */ |
7825551f | 1721 | if ((!pfile->state.in_directive || pfile->state.directive_wants_padding) |
672f38da | 1722 | && src != macro->exp.tokens && !(src[-1].flags & PASTE_LEFT)) |
ce70f433 | 1723 | { |
1724 | const cpp_token *t = padding_token (pfile, src); | |
1725 | unsigned index = expanded_token_index (pfile, macro, src, i); | |
1726 | /* Allocate a virtual location for the padding token and | |
1727 | append the token and its location to BUFF and | |
1728 | VIRT_LOCS. */ | |
1729 | tokens_buff_add_token (buff, virt_locs, t, | |
1730 | t->src_loc, t->src_loc, | |
1731 | map, index); | |
1732 | } | |
79bd622b | 1733 | |
ce70f433 | 1734 | if (arg_tokens_count) |
f9b5f742 | 1735 | { |
ce70f433 | 1736 | /* So now we've got the number of tokens that make up the |
1737 | argument that is going to replace the current parameter | |
1738 | in the macro's replacement list. */ | |
1739 | unsigned int j; | |
1740 | for (j = 0; j < arg_tokens_count; ++j) | |
1741 | { | |
1742 | /* So if track_macro_exp is < 2, the user wants to | |
1743 | save extra memory while tracking macro expansion | |
1744 | locations. So in that case here is what we do: | |
1745 | ||
1746 | Suppose we have #define SQARE(A) A * A | |
1747 | ||
1748 | And then we do SQARE(2+3) | |
1749 | ||
1750 | Then the tokens 2, +, 3, will have the same location, | |
1751 | saying they come from the expansion of the argument | |
1752 | A. | |
1753 | ||
1754 | So that means we are going to ignore the COUNT tokens | |
1755 | resulting from the expansion of the current macro | |
1756 | arugment. In other words all the ARG_TOKENS_COUNT tokens | |
1757 | resulting from the expansion of the macro argument will | |
1758 | have the index I. Normally, each of those token should | |
1759 | have index I+J. */ | |
1760 | unsigned token_index = i; | |
1761 | unsigned index; | |
1762 | if (track_macro_exp > 1) | |
1763 | token_index += j; | |
1764 | ||
1765 | index = expanded_token_index (pfile, macro, src, token_index); | |
1766 | tokens_buff_add_token (buff, virt_locs, | |
1767 | macro_arg_token_iter_get_token (&from), | |
1768 | macro_arg_token_iter_get_location (&from), | |
1769 | src->src_loc, map, index); | |
1770 | macro_arg_token_iter_forward (&from); | |
1771 | } | |
79bd622b | 1772 | |
f9b5f742 | 1773 | /* With a non-empty argument on the LHS of ##, the last |
1774 | token should be flagged PASTE_LEFT. */ | |
1775 | if (src->flags & PASTE_LEFT) | |
ce70f433 | 1776 | paste_flag = |
1777 | (const cpp_token **) tokens_buff_last_token_ptr (buff); | |
f9b5f742 | 1778 | } |
403c2b12 | 1779 | else if (CPP_PEDANTIC (pfile) && ! macro->syshdr |
1780 | && ! CPP_OPTION (pfile, c99) | |
1781 | && ! cpp_in_system_header (pfile)) | |
1782 | { | |
49f161b6 | 1783 | if (CPP_OPTION (pfile, cplusplus)) |
1784 | cpp_error (pfile, CPP_DL_PEDWARN, | |
1785 | "invoking macro %s argument %d: " | |
1786 | "empty macro arguments are undefined" | |
1787 | " in ISO C++98", | |
1788 | NODE_NAME (node), | |
1789 | src->val.macro_arg.arg_no); | |
806fe15e | 1790 | else if (CPP_OPTION (pfile, cpp_warn_c90_c99_compat)) |
49f161b6 | 1791 | cpp_error (pfile, CPP_DL_PEDWARN, |
1792 | "invoking macro %s argument %d: " | |
1793 | "empty macro arguments are undefined" | |
1794 | " in ISO C90", | |
1795 | NODE_NAME (node), | |
1796 | src->val.macro_arg.arg_no); | |
403c2b12 | 1797 | } |
806fe15e | 1798 | else if (CPP_OPTION (pfile, cpp_warn_c90_c99_compat) > 0 |
890c2e2f | 1799 | && ! macro->syshdr |
1800 | && ! cpp_in_system_header (pfile) | |
1801 | && ! CPP_OPTION (pfile, cplusplus)) | |
1802 | cpp_error (pfile, CPP_DL_WARNING, | |
1803 | "invoking macro %s argument %d: " | |
1804 | "empty macro arguments are undefined" | |
1805 | " in ISO C90", | |
1806 | NODE_NAME (node), | |
1807 | src->val.macro_arg.arg_no); | |
efdcc728 | 1808 | |
f9b5f742 | 1809 | /* Avoid paste on RHS (even case count == 0). */ |
1810 | if (!pfile->state.in_directive && !(src->flags & PASTE_LEFT)) | |
ce70f433 | 1811 | { |
1812 | const cpp_token *t = &pfile->avoid_paste; | |
1813 | tokens_buff_add_token (buff, virt_locs, | |
1814 | t, t->src_loc, t->src_loc, | |
1815 | NULL, 0); | |
1816 | } | |
79bd622b | 1817 | |
f9b5f742 | 1818 | /* Add a new paste flag, or remove an unwanted one. */ |
1819 | if (paste_flag) | |
1820 | { | |
1821 | cpp_token *token = _cpp_temp_token (pfile); | |
1822 | token->type = (*paste_flag)->type; | |
960391da | 1823 | token->val = (*paste_flag)->val; |
f9b5f742 | 1824 | if (src->flags & PASTE_LEFT) |
1825 | token->flags = (*paste_flag)->flags | PASTE_LEFT; | |
1826 | else | |
1827 | token->flags = (*paste_flag)->flags & ~PASTE_LEFT; | |
1828 | *paste_flag = token; | |
1829 | } | |
3c7df4d3 | 1830 | |
ce70f433 | 1831 | i += arg_tokens_count; |
1832 | } | |
f9b5f742 | 1833 | |
ce70f433 | 1834 | if (track_macro_exp) |
1835 | push_extended_tokens_context (pfile, node, buff, virt_locs, first, | |
1836 | tokens_buff_count (buff)); | |
1837 | else | |
1838 | push_ptoken_context (pfile, node, buff, first, | |
1839 | tokens_buff_count (buff)); | |
e77b8253 | 1840 | |
1841 | num_macro_tokens_counter += tokens_buff_count (buff); | |
f9b5f742 | 1842 | } |
1843 | ||
1844 | /* Return a special padding token, with padding inherited from SOURCE. */ | |
1845 | static const cpp_token * | |
f7fdd7a1 | 1846 | padding_token (cpp_reader *pfile, const cpp_token *source) |
f9b5f742 | 1847 | { |
1848 | cpp_token *result = _cpp_temp_token (pfile); | |
1849 | ||
1850 | result->type = CPP_PADDING; | |
bb30d1f4 | 1851 | |
1852 | /* Data in GCed data structures cannot be made const so far, so we | |
1853 | need a cast here. */ | |
1854 | result->val.source = (cpp_token *) source; | |
f9b5f742 | 1855 | result->flags = 0; |
1856 | return result; | |
1857 | } | |
1858 | ||
88cf66fa | 1859 | /* Get a new uninitialized context. Create a new one if we cannot |
1860 | re-use an old one. */ | |
f9b5f742 | 1861 | static cpp_context * |
f7fdd7a1 | 1862 | next_context (cpp_reader *pfile) |
f9b5f742 | 1863 | { |
1864 | cpp_context *result = pfile->context->next; | |
1865 | ||
1866 | if (result == 0) | |
69461e0d | 1867 | { |
3b298764 | 1868 | result = XNEW (cpp_context); |
ce70f433 | 1869 | memset (result, 0, sizeof (cpp_context)); |
f9b5f742 | 1870 | result->prev = pfile->context; |
1871 | result->next = 0; | |
1872 | pfile->context->next = result; | |
79bd622b | 1873 | } |
f9b5f742 | 1874 | |
1875 | pfile->context = result; | |
1876 | return result; | |
79bd622b | 1877 | } |
1878 | ||
f9b5f742 | 1879 | /* Push a list of pointers to tokens. */ |
1880 | static void | |
f7fdd7a1 | 1881 | push_ptoken_context (cpp_reader *pfile, cpp_hashnode *macro, _cpp_buff *buff, |
1882 | const cpp_token **first, unsigned int count) | |
79bd622b | 1883 | { |
1884 | cpp_context *context = next_context (pfile); | |
79bd622b | 1885 | |
ce70f433 | 1886 | context->tokens_kind = TOKENS_KIND_INDIRECT; |
1887 | context->c.macro = macro; | |
084163dc | 1888 | context->buff = buff; |
a854276a | 1889 | FIRST (context).ptoken = first; |
1890 | LAST (context).ptoken = first + count; | |
f9b5f742 | 1891 | } |
1892 | ||
00abfdc0 | 1893 | /* Push a list of tokens. |
1894 | ||
1895 | A NULL macro means that we should continue the current macro | |
1896 | expansion, in essence. That means that if we are currently in a | |
1897 | macro expansion context, we'll make the new pfile->context refer to | |
1898 | the current macro. */ | |
b75b98aa | 1899 | void |
1900 | _cpp_push_token_context (cpp_reader *pfile, cpp_hashnode *macro, | |
1901 | const cpp_token *first, unsigned int count) | |
f9b5f742 | 1902 | { |
00abfdc0 | 1903 | cpp_context *context; |
1904 | ||
1905 | if (macro == NULL) | |
1906 | macro = macro_of_context (pfile->context); | |
1907 | ||
1908 | context = next_context (pfile); | |
ce70f433 | 1909 | context->tokens_kind = TOKENS_KIND_DIRECT; |
1910 | context->c.macro = macro; | |
1911 | context->buff = NULL; | |
00abfdc0 | 1912 | FIRST (context).token = first; |
1913 | LAST (context).token = first + count; | |
79bd622b | 1914 | } |
1915 | ||
ce70f433 | 1916 | /* Build a context containing a list of tokens as well as their |
1917 | virtual locations and push it. TOKENS_BUFF is the buffer that | |
1918 | contains the tokens pointed to by FIRST. If TOKENS_BUFF is | |
1919 | non-NULL, it means that the context owns it, meaning that | |
1920 | _cpp_pop_context will free it as well as VIRT_LOCS_BUFF that | |
00abfdc0 | 1921 | contains the virtual locations. |
1922 | ||
1923 | A NULL macro means that we should continue the current macro | |
1924 | expansion, in essence. That means that if we are currently in a | |
1925 | macro expansion context, we'll make the new pfile->context refer to | |
1926 | the current macro. */ | |
ce70f433 | 1927 | static void |
1928 | push_extended_tokens_context (cpp_reader *pfile, | |
1929 | cpp_hashnode *macro, | |
1930 | _cpp_buff *token_buff, | |
1931 | source_location *virt_locs, | |
1932 | const cpp_token **first, | |
1933 | unsigned int count) | |
1934 | { | |
00abfdc0 | 1935 | cpp_context *context; |
ce70f433 | 1936 | macro_context *m; |
1937 | ||
00abfdc0 | 1938 | if (macro == NULL) |
1939 | macro = macro_of_context (pfile->context); | |
1940 | ||
1941 | context = next_context (pfile); | |
ce70f433 | 1942 | context->tokens_kind = TOKENS_KIND_EXTENDED; |
1943 | context->buff = token_buff; | |
1944 | ||
1945 | m = XNEW (macro_context); | |
1946 | m->macro_node = macro; | |
1947 | m->virt_locs = virt_locs; | |
1948 | m->cur_virt_loc = virt_locs; | |
1949 | context->c.mc = m; | |
1950 | FIRST (context).ptoken = first; | |
1951 | LAST (context).ptoken = first + count; | |
1952 | } | |
1953 | ||
f15f6c8d | 1954 | /* Push a traditional macro's replacement text. */ |
1955 | void | |
f7fdd7a1 | 1956 | _cpp_push_text_context (cpp_reader *pfile, cpp_hashnode *macro, |
1957 | const uchar *start, size_t len) | |
f15f6c8d | 1958 | { |
1959 | cpp_context *context = next_context (pfile); | |
1960 | ||
ce70f433 | 1961 | context->tokens_kind = TOKENS_KIND_DIRECT; |
1962 | context->c.macro = macro; | |
f15f6c8d | 1963 | context->buff = NULL; |
1964 | CUR (context) = start; | |
06025647 | 1965 | RLIMIT (context) = start + len; |
01628c3c | 1966 | macro->flags |= NODE_DISABLED; |
f15f6c8d | 1967 | } |
1968 | ||
ce70f433 | 1969 | /* Creates a buffer that holds tokens a.k.a "token buffer", usually |
1970 | for the purpose of storing them on a cpp_context. If VIRT_LOCS is | |
1971 | non-null (which means that -ftrack-macro-expansion is on), | |
1972 | *VIRT_LOCS is set to a newly allocated buffer that is supposed to | |
1973 | hold the virtual locations of the tokens resulting from macro | |
1974 | expansion. */ | |
1975 | static _cpp_buff* | |
1976 | tokens_buff_new (cpp_reader *pfile, size_t len, | |
1977 | source_location **virt_locs) | |
1978 | { | |
1979 | size_t tokens_size = len * sizeof (cpp_token *); | |
1980 | size_t locs_size = len * sizeof (source_location); | |
1981 | ||
1982 | if (virt_locs != NULL) | |
1983 | *virt_locs = XNEWVEC (source_location, locs_size); | |
1984 | return _cpp_get_buff (pfile, tokens_size); | |
1985 | } | |
1986 | ||
1987 | /* Returns the number of tokens contained in a token buffer. The | |
1988 | buffer holds a set of cpp_token*. */ | |
1989 | static size_t | |
1990 | tokens_buff_count (_cpp_buff *buff) | |
1991 | { | |
1992 | return (BUFF_FRONT (buff) - buff->base) / sizeof (cpp_token *); | |
1993 | } | |
1994 | ||
1995 | /* Return a pointer to the last token contained in the token buffer | |
1996 | BUFF. */ | |
1997 | static const cpp_token ** | |
1998 | tokens_buff_last_token_ptr (_cpp_buff *buff) | |
1999 | { | |
2000 | return &((const cpp_token **) BUFF_FRONT (buff))[-1]; | |
2001 | } | |
2002 | ||
2003 | /* Remove the last token contained in the token buffer TOKENS_BUFF. | |
2004 | If VIRT_LOCS_BUFF is non-NULL, it should point at the buffer | |
2005 | containing the virtual locations of the tokens in TOKENS_BUFF; in | |
2006 | which case the function updates that buffer as well. */ | |
2007 | static inline void | |
2008 | tokens_buff_remove_last_token (_cpp_buff *tokens_buff) | |
2009 | ||
2010 | { | |
2011 | if (BUFF_FRONT (tokens_buff) > tokens_buff->base) | |
2012 | BUFF_FRONT (tokens_buff) = | |
2013 | (unsigned char *) &((cpp_token **) BUFF_FRONT (tokens_buff))[-1]; | |
2014 | } | |
2015 | ||
2016 | /* Insert a token into the token buffer at the position pointed to by | |
2017 | DEST. Note that the buffer is not enlarged so the previous token | |
2018 | that was at *DEST is overwritten. VIRT_LOC_DEST, if non-null, | |
2019 | means -ftrack-macro-expansion is effect; it then points to where to | |
2020 | insert the virtual location of TOKEN. TOKEN is the token to | |
2021 | insert. VIRT_LOC is the virtual location of the token, i.e, the | |
e8aa7eaf | 2022 | location possibly encoding its locus across macro expansion. If |
ce70f433 | 2023 | TOKEN is an argument of a function-like macro (inside a macro |
2024 | replacement list), PARM_DEF_LOC is the spelling location of the | |
2025 | macro parameter that TOKEN is replacing, in the replacement list of | |
2026 | the macro. If TOKEN is not an argument of a function-like macro or | |
2027 | if it doesn't come from a macro expansion, then VIRT_LOC can just | |
2028 | be set to the same value as PARM_DEF_LOC. If MAP is non null, it | |
2029 | means TOKEN comes from a macro expansion and MAP is the macro map | |
2030 | associated to the macro. MACRO_TOKEN_INDEX points to the index of | |
2031 | the token in the macro map; it is not considered if MAP is NULL. | |
2032 | ||
2033 | Upon successful completion this function returns the a pointer to | |
2034 | the position of the token coming right after the insertion | |
2035 | point. */ | |
2036 | static inline const cpp_token ** | |
2037 | tokens_buff_put_token_to (const cpp_token **dest, | |
2038 | source_location *virt_loc_dest, | |
2039 | const cpp_token *token, | |
2040 | source_location virt_loc, | |
2041 | source_location parm_def_loc, | |
2042 | const struct line_map *map, | |
2043 | unsigned int macro_token_index) | |
2044 | { | |
2045 | source_location macro_loc = virt_loc; | |
2046 | const cpp_token **result; | |
2047 | ||
2048 | if (virt_loc_dest) | |
2049 | { | |
2050 | /* -ftrack-macro-expansion is on. */ | |
2051 | if (map) | |
2052 | macro_loc = linemap_add_macro_token (map, macro_token_index, | |
2053 | virt_loc, parm_def_loc); | |
2054 | *virt_loc_dest = macro_loc; | |
2055 | } | |
2056 | *dest = token; | |
2057 | result = &dest[1]; | |
2058 | ||
2059 | return result; | |
2060 | } | |
2061 | ||
2062 | /* Adds a token at the end of the tokens contained in BUFFER. Note | |
2063 | that this function doesn't enlarge BUFFER when the number of tokens | |
2064 | reaches BUFFER's size; it aborts in that situation. | |
2065 | ||
2066 | TOKEN is the token to append. VIRT_LOC is the virtual location of | |
e8aa7eaf | 2067 | the token, i.e, the location possibly encoding its locus across |
ce70f433 | 2068 | macro expansion. If TOKEN is an argument of a function-like macro |
2069 | (inside a macro replacement list), PARM_DEF_LOC is the location of | |
2070 | the macro parameter that TOKEN is replacing. If TOKEN doesn't come | |
2071 | from a macro expansion, then VIRT_LOC can just be set to the same | |
2072 | value as PARM_DEF_LOC. If MAP is non null, it means TOKEN comes | |
2073 | from a macro expansion and MAP is the macro map associated to the | |
2074 | macro. MACRO_TOKEN_INDEX points to the index of the token in the | |
2075 | macro map; It is not considered if MAP is NULL. If VIRT_LOCS is | |
2076 | non-null, it means -ftrack-macro-expansion is on; in which case | |
2077 | this function adds the virtual location DEF_LOC to the VIRT_LOCS | |
2078 | array, at the same index as the one of TOKEN in BUFFER. Upon | |
2079 | successful completion this function returns the a pointer to the | |
2080 | position of the token coming right after the insertion point. */ | |
2081 | static const cpp_token ** | |
2082 | tokens_buff_add_token (_cpp_buff *buffer, | |
2083 | source_location *virt_locs, | |
2084 | const cpp_token *token, | |
2085 | source_location virt_loc, | |
2086 | source_location parm_def_loc, | |
2087 | const struct line_map *map, | |
2088 | unsigned int macro_token_index) | |
2089 | { | |
2090 | const cpp_token **result; | |
2091 | source_location *virt_loc_dest = NULL; | |
2092 | unsigned token_index = | |
2093 | (BUFF_FRONT (buffer) - buffer->base) / sizeof (cpp_token *); | |
2094 | ||
2095 | /* Abort if we pass the end the buffer. */ | |
2096 | if (BUFF_FRONT (buffer) > BUFF_LIMIT (buffer)) | |
2097 | abort (); | |
2098 | ||
2099 | if (virt_locs != NULL) | |
2100 | virt_loc_dest = &virt_locs[token_index]; | |
2101 | ||
2102 | result = | |
2103 | tokens_buff_put_token_to ((const cpp_token **) BUFF_FRONT (buffer), | |
2104 | virt_loc_dest, token, virt_loc, parm_def_loc, | |
2105 | map, macro_token_index); | |
2106 | ||
2107 | BUFF_FRONT (buffer) = (unsigned char *) result; | |
2108 | return result; | |
2109 | } | |
2110 | ||
2111 | /* Allocate space for the function-like macro argument ARG to store | |
2112 | the tokens resulting from the macro-expansion of the tokens that | |
2113 | make up ARG itself. That space is allocated in ARG->expanded and | |
2114 | needs to be freed using free. */ | |
2115 | static void | |
2116 | alloc_expanded_arg_mem (cpp_reader *pfile, macro_arg *arg, size_t capacity) | |
2117 | { | |
2118 | #ifdef ENABLE_CHECKING | |
2119 | if (arg->expanded != NULL | |
2120 | || arg->expanded_virt_locs != NULL) | |
2121 | abort (); | |
2122 | #endif | |
2123 | arg->expanded = XNEWVEC (const cpp_token *, capacity); | |
2124 | if (CPP_OPTION (pfile, track_macro_expansion)) | |
2125 | arg->expanded_virt_locs = XNEWVEC (source_location, capacity); | |
2126 | ||
2127 | } | |
2128 | ||
2129 | /* If necessary, enlarge ARG->expanded to so that it can contain SIZE | |
2130 | tokens. */ | |
2131 | static void | |
2132 | ensure_expanded_arg_room (cpp_reader *pfile, macro_arg *arg, | |
2133 | size_t size, size_t *expanded_capacity) | |
2134 | { | |
2135 | if (size <= *expanded_capacity) | |
2136 | return; | |
2137 | ||
2138 | size *= 2; | |
2139 | ||
2140 | arg->expanded = | |
2141 | XRESIZEVEC (const cpp_token *, arg->expanded, size); | |
2142 | *expanded_capacity = size; | |
2143 | ||
2144 | if (CPP_OPTION (pfile, track_macro_expansion)) | |
2145 | { | |
2146 | if (arg->expanded_virt_locs == NULL) | |
2147 | arg->expanded_virt_locs = XNEWVEC (source_location, size); | |
2148 | else | |
2149 | arg->expanded_virt_locs = XRESIZEVEC (source_location, | |
2150 | arg->expanded_virt_locs, | |
2151 | size); | |
2152 | } | |
2153 | } | |
2154 | ||
88cf66fa | 2155 | /* Expand an argument ARG before replacing parameters in a |
2156 | function-like macro. This works by pushing a context with the | |
2157 | argument's tokens, and then expanding that into a temporary buffer | |
2158 | as if it were a normal part of the token stream. collect_args() | |
2159 | has terminated the argument's tokens with a CPP_EOF so that we know | |
2160 | when we have fully expanded the argument. */ | |
79bd622b | 2161 | static void |
f7fdd7a1 | 2162 | expand_arg (cpp_reader *pfile, macro_arg *arg) |
79bd622b | 2163 | { |
ce70f433 | 2164 | size_t capacity; |
dbb7d6f7 | 2165 | bool saved_warn_trad; |
ce70f433 | 2166 | bool track_macro_exp_p = CPP_OPTION (pfile, track_macro_expansion); |
f9b5f742 | 2167 | |
ce70f433 | 2168 | if (arg->count == 0 |
2169 | || arg->expanded != NULL) | |
f9b5f742 | 2170 | return; |
79bd622b | 2171 | |
dbb7d6f7 | 2172 | /* Don't warn about funlike macros when pre-expanding. */ |
2173 | saved_warn_trad = CPP_WTRADITIONAL (pfile); | |
2174 | CPP_WTRADITIONAL (pfile) = 0; | |
2175 | ||
ce70f433 | 2176 | /* Loop, reading in the tokens of the argument. */ |
f9b5f742 | 2177 | capacity = 256; |
ce70f433 | 2178 | alloc_expanded_arg_mem (pfile, arg, capacity); |
2179 | ||
2180 | if (track_macro_exp_p) | |
2181 | push_extended_tokens_context (pfile, NULL, NULL, | |
2182 | arg->virt_locs, | |
2183 | arg->first, | |
2184 | arg->count + 1); | |
2185 | else | |
2186 | push_ptoken_context (pfile, NULL, NULL, | |
2187 | arg->first, arg->count + 1); | |
79bd622b | 2188 | |
f9b5f742 | 2189 | for (;;) |
79bd622b | 2190 | { |
f9b5f742 | 2191 | const cpp_token *token; |
ce70f433 | 2192 | source_location location; |
f9b5f742 | 2193 | |
ce70f433 | 2194 | ensure_expanded_arg_room (pfile, arg, arg->expanded_count + 1, |
2195 | &capacity); | |
79bd622b | 2196 | |
ce70f433 | 2197 | token = cpp_get_token_1 (pfile, &location); |
79bd622b | 2198 | |
f9b5f742 | 2199 | if (token->type == CPP_EOF) |
2200 | break; | |
2201 | ||
ce70f433 | 2202 | set_arg_token (arg, token, location, |
2203 | arg->expanded_count, MACRO_ARG_TOKEN_EXPANDED, | |
2204 | CPP_OPTION (pfile, track_macro_expansion)); | |
2205 | arg->expanded_count++; | |
f9b5f742 | 2206 | } |
2207 | ||
084163dc | 2208 | _cpp_pop_context (pfile); |
dbb7d6f7 | 2209 | |
2210 | CPP_WTRADITIONAL (pfile) = saved_warn_trad; | |
79bd622b | 2211 | } |
2212 | ||
00abfdc0 | 2213 | /* Returns the macro associated to the current context if we are in |
2214 | the context a macro expansion, NULL otherwise. */ | |
2215 | static cpp_hashnode* | |
2216 | macro_of_context (cpp_context *context) | |
2217 | { | |
2218 | if (context == NULL) | |
2219 | return NULL; | |
2220 | ||
2221 | return (context->tokens_kind == TOKENS_KIND_EXTENDED) | |
2222 | ? context->c.mc->macro_node | |
2223 | : context->c.macro; | |
2224 | } | |
2225 | ||
8c6425eb | 2226 | /* Return TRUE iff we are expanding a macro or are about to start |
2227 | expanding one. If we are effectively expanding a macro, the | |
2228 | function macro_of_context returns a pointer to the macro being | |
2229 | expanded. */ | |
2230 | static bool | |
2231 | in_macro_expansion_p (cpp_reader *pfile) | |
2232 | { | |
2233 | if (pfile == NULL) | |
2234 | return false; | |
2235 | ||
2236 | return (pfile->about_to_expand_macro_p | |
2237 | || macro_of_context (pfile->context)); | |
2238 | } | |
2239 | ||
88cf66fa | 2240 | /* Pop the current context off the stack, re-enabling the macro if the |
ce70f433 | 2241 | context represented a macro's replacement list. Initially the |
2242 | context structure was not freed so that we can re-use it later, but | |
2243 | now we do free it to reduce peak memory consumption. */ | |
79bd622b | 2244 | void |
f7fdd7a1 | 2245 | _cpp_pop_context (cpp_reader *pfile) |
79bd622b | 2246 | { |
084163dc | 2247 | cpp_context *context = pfile->context; |
2248 | ||
6cfa7465 | 2249 | /* We should not be popping the base context. */ |
2250 | if (context == &pfile->base_context) | |
2251 | abort (); | |
2252 | ||
ce70f433 | 2253 | if (context->c.macro) |
2254 | { | |
2255 | cpp_hashnode *macro; | |
2256 | if (context->tokens_kind == TOKENS_KIND_EXTENDED) | |
2257 | { | |
2258 | macro_context *mc = context->c.mc; | |
2259 | macro = mc->macro_node; | |
2260 | /* If context->buff is set, it means the life time of tokens | |
2261 | is bound to the life time of this context; so we must | |
2262 | free the tokens; that means we must free the virtual | |
2263 | locations of these tokens too. */ | |
2264 | if (context->buff && mc->virt_locs) | |
2265 | { | |
2266 | free (mc->virt_locs); | |
2267 | mc->virt_locs = NULL; | |
2268 | } | |
2269 | free (mc); | |
2270 | context->c.mc = NULL; | |
2271 | } | |
2272 | else | |
2273 | macro = context->c.macro; | |
2274 | ||
2275 | /* Beware that MACRO can be NULL in cases like when we are | |
2276 | called from expand_arg. In those cases, a dummy context with | |
2277 | tokens is pushed just for the purpose of walking them using | |
2278 | cpp_get_token_1. In that case, no 'macro' field is set into | |
2279 | the dummy context. */ | |
00abfdc0 | 2280 | if (macro != NULL |
2281 | /* Several contiguous macro expansion contexts can be | |
2282 | associated to the same macro; that means it's the same | |
e8aa7eaf | 2283 | macro expansion that spans across all these (sub) |
00abfdc0 | 2284 | contexts. So we should re-enable an expansion-disabled |
2285 | macro only when we are sure we are really out of that | |
2286 | macro expansion. */ | |
2287 | && macro_of_context (context->prev) != macro) | |
ce70f433 | 2288 | macro->flags &= ~NODE_DISABLED; |
2289 | } | |
084163dc | 2290 | |
2291 | if (context->buff) | |
ce70f433 | 2292 | { |
2293 | /* Decrease memory peak consumption by freeing the memory used | |
2294 | by the context. */ | |
2295 | _cpp_free_buff (context->buff); | |
2296 | } | |
79bd622b | 2297 | |
084163dc | 2298 | pfile->context = context->prev; |
ce70f433 | 2299 | /* decrease peak memory consumption by feeing the context. */ |
2300 | pfile->context->next = NULL; | |
2301 | free (context); | |
79bd622b | 2302 | } |
2303 | ||
ce70f433 | 2304 | /* Return TRUE if we reached the end of the set of tokens stored in |
2305 | CONTEXT, FALSE otherwise. */ | |
2306 | static inline bool | |
2307 | reached_end_of_context (cpp_context *context) | |
2308 | { | |
2309 | if (context->tokens_kind == TOKENS_KIND_DIRECT) | |
2310 | return FIRST (context).token == LAST (context).token; | |
2311 | else if (context->tokens_kind == TOKENS_KIND_INDIRECT | |
2312 | || context->tokens_kind == TOKENS_KIND_EXTENDED) | |
2313 | return FIRST (context).ptoken == LAST (context).ptoken; | |
2314 | else | |
2315 | abort (); | |
2316 | } | |
2317 | ||
2318 | /* Consume the next token contained in the current context of PFILE, | |
2319 | and return it in *TOKEN. It's "full location" is returned in | |
2320 | *LOCATION. If -ftrack-macro-location is in effeect, fFull location" | |
e8aa7eaf | 2321 | means the location encoding the locus of the token across macro |
ce70f433 | 2322 | expansion; otherwise it's just is the "normal" location of the |
2323 | token which (*TOKEN)->src_loc. */ | |
2324 | static inline void | |
2325 | consume_next_token_from_context (cpp_reader *pfile, | |
2326 | const cpp_token ** token, | |
2327 | source_location *location) | |
2328 | { | |
2329 | cpp_context *c = pfile->context; | |
2330 | ||
2331 | if ((c)->tokens_kind == TOKENS_KIND_DIRECT) | |
2332 | { | |
2333 | *token = FIRST (c).token; | |
2334 | *location = (*token)->src_loc; | |
2335 | FIRST (c).token++; | |
2336 | } | |
2337 | else if ((c)->tokens_kind == TOKENS_KIND_INDIRECT) | |
2338 | { | |
2339 | *token = *FIRST (c).ptoken; | |
2340 | *location = (*token)->src_loc; | |
2341 | FIRST (c).ptoken++; | |
2342 | } | |
2343 | else if ((c)->tokens_kind == TOKENS_KIND_EXTENDED) | |
2344 | { | |
2345 | macro_context *m = c->c.mc; | |
2346 | *token = *FIRST (c).ptoken; | |
2347 | if (m->virt_locs) | |
2348 | { | |
2349 | *location = *m->cur_virt_loc; | |
2350 | m->cur_virt_loc++; | |
2351 | } | |
2352 | else | |
2353 | *location = (*token)->src_loc; | |
2354 | FIRST (c).ptoken++; | |
2355 | } | |
2356 | else | |
2357 | abort (); | |
2358 | } | |
2359 | ||
2360 | /* In the traditional mode of the preprocessor, if we are currently in | |
2361 | a directive, the location of a token must be the location of the | |
2362 | start of the directive line. This function returns the proper | |
2363 | location if we are in the traditional mode, and just returns | |
2364 | LOCATION otherwise. */ | |
2365 | ||
2366 | static inline source_location | |
2367 | maybe_adjust_loc_for_trad_cpp (cpp_reader *pfile, source_location location) | |
2368 | { | |
2369 | if (CPP_OPTION (pfile, traditional)) | |
2370 | { | |
2371 | if (pfile->state.in_directive) | |
2372 | return pfile->directive_line; | |
2373 | } | |
2374 | return location; | |
2375 | } | |
2376 | ||
2377 | /* Routine to get a token as well as its location. | |
343fd982 | 2378 | |
2379 | Macro expansions and directives are transparently handled, | |
2380 | including entering included files. Thus tokens are post-macro | |
2381 | expansion, and after any intervening directives. External callers | |
2382 | see CPP_EOF only at EOF. Internal callers also see it when meeting | |
2383 | a directive inside a macro call, when at the end of a directive and | |
2384 | state.in_directive is still 1, and at the end of argument | |
ce70f433 | 2385 | pre-expansion. |
2386 | ||
2387 | LOC is an out parameter; *LOC is set to the location "as expected | |
2388 | by the user". Please read the comment of | |
2389 | cpp_get_token_with_location to learn more about the meaning of this | |
2390 | location. */ | |
2391 | static const cpp_token* | |
2392 | cpp_get_token_1 (cpp_reader *pfile, source_location *location) | |
79bd622b | 2393 | { |
f9b5f742 | 2394 | const cpp_token *result; |
ce70f433 | 2395 | /* This token is a virtual token that either encodes a location |
2396 | related to macro expansion or a spelling location. */ | |
2397 | source_location virt_loc = 0; | |
8c6425eb | 2398 | /* pfile->about_to_expand_macro_p can be overriden by indirect calls |
2399 | to functions that push macro contexts. So let's save it so that | |
2400 | we can restore it when we are about to leave this routine. */ | |
2401 | bool saved_about_to_expand_macro = pfile->about_to_expand_macro_p; | |
f9b5f742 | 2402 | |
def71b06 | 2403 | for (;;) |
79bd622b | 2404 | { |
f9b5f742 | 2405 | cpp_hashnode *node; |
79bd622b | 2406 | cpp_context *context = pfile->context; |
2407 | ||
79bd622b | 2408 | /* Context->prev == 0 <=> base context. */ |
fb5ab82c | 2409 | if (!context->prev) |
def71b06 | 2410 | { |
ce70f433 | 2411 | result = _cpp_lex_token (pfile); |
2412 | virt_loc = result->src_loc; | |
2413 | } | |
2414 | else if (!reached_end_of_context (context)) | |
2415 | { | |
2416 | consume_next_token_from_context (pfile, &result, | |
2417 | &virt_loc); | |
f9b5f742 | 2418 | if (result->flags & PASTE_LEFT) |
e55de93e | 2419 | { |
f9b5f742 | 2420 | paste_all_tokens (pfile, result); |
2421 | if (pfile->state.in_directive) | |
2422 | continue; | |
ce70f433 | 2423 | result = padding_token (pfile, result); |
2424 | goto out; | |
e55de93e | 2425 | } |
def71b06 | 2426 | } |
79bd622b | 2427 | else |
2428 | { | |
e77b8253 | 2429 | if (pfile->context->c.macro) |
2430 | ++num_expanded_macros_counter; | |
fb5ab82c | 2431 | _cpp_pop_context (pfile); |
f9b5f742 | 2432 | if (pfile->state.in_directive) |
2433 | continue; | |
ce70f433 | 2434 | result = &pfile->avoid_paste; |
2435 | goto out; | |
79bd622b | 2436 | } |
79bd622b | 2437 | |
d3f7919d | 2438 | if (pfile->state.in_directive && result->type == CPP_COMMENT) |
2439 | continue; | |
2440 | ||
f9b5f742 | 2441 | if (result->type != CPP_NAME) |
79bd622b | 2442 | break; |
2443 | ||
2ee04baa | 2444 | node = result->val.node.node; |
f9b5f742 | 2445 | |
c7e5d924 | 2446 | if (node->type != NT_MACRO || (result->flags & NO_EXPAND)) |
2447 | break; | |
b1a9ff83 | 2448 | |
c7e5d924 | 2449 | if (!(node->flags & NODE_DISABLED)) |
79bd622b | 2450 | { |
89768577 | 2451 | int ret = 0; |
931b0a0f | 2452 | /* If not in a macro context, and we're going to start an |
2453 | expansion, record the location. */ | |
8c6425eb | 2454 | if (!in_macro_expansion_p (pfile)) |
931b0a0f | 2455 | pfile->invocation_location = result->src_loc; |
45f9f140 | 2456 | if (pfile->state.prevent_expansion) |
2457 | break; | |
89768577 | 2458 | |
2459 | /* Conditional macros require that a predicate be evaluated | |
2460 | first. */ | |
4514949a | 2461 | if ((node->flags & NODE_CONDITIONAL) != 0) |
2462 | { | |
2463 | if (pfile->cb.macro_to_expand) | |
2464 | { | |
2465 | bool whitespace_after; | |
2466 | const cpp_token *peek_tok = cpp_peek_token (pfile, 0); | |
2467 | ||
2468 | whitespace_after = (peek_tok->type == CPP_PADDING | |
2469 | || (peek_tok->flags & PREV_WHITE)); | |
2470 | node = pfile->cb.macro_to_expand (pfile, result); | |
2471 | if (node) | |
ce70f433 | 2472 | ret = enter_macro_context (pfile, node, result, |
2473 | virt_loc); | |
4514949a | 2474 | else if (whitespace_after) |
2475 | { | |
2476 | /* If macro_to_expand hook returned NULL and it | |
2477 | ate some tokens, see if we don't need to add | |
2478 | a padding token in between this and the | |
2479 | next token. */ | |
2480 | peek_tok = cpp_peek_token (pfile, 0); | |
2481 | if (peek_tok->type != CPP_PADDING | |
2482 | && (peek_tok->flags & PREV_WHITE) == 0) | |
2483 | _cpp_push_token_context (pfile, NULL, | |
2484 | padding_token (pfile, | |
2485 | peek_tok), 1); | |
2486 | } | |
2487 | } | |
2488 | } | |
2489 | else | |
ce70f433 | 2490 | ret = enter_macro_context (pfile, node, result, |
2491 | virt_loc); | |
4514949a | 2492 | if (ret) |
89768577 | 2493 | { |
45f9f140 | 2494 | if (pfile->state.in_directive || ret == 2) |
f9b5f742 | 2495 | continue; |
ce70f433 | 2496 | result = padding_token (pfile, result); |
2497 | goto out; | |
8c2e2fc5 | 2498 | } |
79bd622b | 2499 | } |
c7e5d924 | 2500 | else |
2501 | { | |
88cf66fa | 2502 | /* Flag this token as always unexpandable. FIXME: move this |
2503 | to collect_args()?. */ | |
c7e5d924 | 2504 | cpp_token *t = _cpp_temp_token (pfile); |
2505 | t->type = result->type; | |
2506 | t->flags = result->flags | NO_EXPAND; | |
960391da | 2507 | t->val = result->val; |
c7e5d924 | 2508 | result = t; |
2509 | } | |
396ffa86 | 2510 | |
c7e5d924 | 2511 | break; |
79bd622b | 2512 | } |
f9b5f742 | 2513 | |
ce70f433 | 2514 | out: |
2515 | if (location != NULL) | |
2516 | { | |
2517 | if (virt_loc == 0) | |
2518 | virt_loc = result->src_loc; | |
2519 | *location = virt_loc; | |
2520 | ||
2521 | if (!CPP_OPTION (pfile, track_macro_expansion) | |
8c6425eb | 2522 | && macro_of_context (pfile->context) != NULL) |
ce70f433 | 2523 | /* We are in a macro expansion context, are not tracking |
2524 | virtual location, but were asked to report the location | |
2525 | of the expansion point of the macro being expanded. */ | |
2526 | *location = pfile->invocation_location; | |
2527 | ||
2528 | *location = maybe_adjust_loc_for_trad_cpp (pfile, *location); | |
2529 | } | |
8c6425eb | 2530 | |
2531 | pfile->about_to_expand_macro_p = saved_about_to_expand_macro; | |
f9b5f742 | 2532 | return result; |
79bd622b | 2533 | } |
2534 | ||
ce70f433 | 2535 | /* External routine to get a token. Also used nearly everywhere |
2536 | internally, except for places where we know we can safely call | |
2537 | _cpp_lex_token directly, such as lexing a directive name. | |
2538 | ||
2539 | Macro expansions and directives are transparently handled, | |
2540 | including entering included files. Thus tokens are post-macro | |
2541 | expansion, and after any intervening directives. External callers | |
2542 | see CPP_EOF only at EOF. Internal callers also see it when meeting | |
2543 | a directive inside a macro call, when at the end of a directive and | |
2544 | state.in_directive is still 1, and at the end of argument | |
2545 | pre-expansion. */ | |
2546 | const cpp_token * | |
2547 | cpp_get_token (cpp_reader *pfile) | |
2548 | { | |
2549 | return cpp_get_token_1 (pfile, NULL); | |
2550 | } | |
2551 | ||
2552 | /* Like cpp_get_token, but also returns a virtual token location | |
2553 | separate from the spelling location carried by the returned token. | |
2554 | ||
2555 | LOC is an out parameter; *LOC is set to the location "as expected | |
2556 | by the user". This matters when a token results from macro | |
2557 | expansion; in that case the token's spelling location indicates the | |
2558 | locus of the token in the definition of the macro but *LOC | |
2559 | virtually encodes all the other meaningful locuses associated to | |
2560 | the token. | |
2561 | ||
2562 | What? virtual location? Yes, virtual location. | |
2563 | ||
2564 | If the token results from macro expansion and if macro expansion | |
2565 | location tracking is enabled its virtual location encodes (at the | |
2566 | same time): | |
2567 | ||
2568 | - the spelling location of the token | |
2569 | ||
2570 | - the locus of the macro expansion point | |
2571 | ||
2572 | - the locus of the point where the token got instantiated as part | |
2573 | of the macro expansion process. | |
2574 | ||
2575 | You have to use the linemap API to get the locus you are interested | |
2576 | in from a given virtual location. | |
2577 | ||
2578 | Note however that virtual locations are not necessarily ordered for | |
2579 | relations '<' and '>'. One must use the function | |
2580 | linemap_location_before_p instead of using the relational operator | |
2581 | '<'. | |
2582 | ||
2583 | If macro expansion tracking is off and if the token results from | |
2584 | macro expansion the virtual location is the expansion point of the | |
2585 | macro that got expanded. | |
2586 | ||
2587 | When the token doesn't result from macro expansion, the virtual | |
2588 | location is just the same thing as its spelling location. */ | |
2589 | ||
931b0a0f | 2590 | const cpp_token * |
2591 | cpp_get_token_with_location (cpp_reader *pfile, source_location *loc) | |
2592 | { | |
8c6425eb | 2593 | return cpp_get_token_1 (pfile, loc); |
931b0a0f | 2594 | } |
2595 | ||
ae2348f6 | 2596 | /* Returns true if we're expanding an object-like macro that was |
2597 | defined in a system header. Just checks the macro at the top of | |
2598 | the stack. Used for diagnostic suppression. */ | |
2599 | int | |
f7fdd7a1 | 2600 | cpp_sys_macro_p (cpp_reader *pfile) |
ae2348f6 | 2601 | { |
d16f4f47 | 2602 | cpp_hashnode *node = NULL; |
2603 | ||
2604 | if (pfile->context->tokens_kind == TOKENS_KIND_EXTENDED) | |
2605 | node = pfile->context->c.mc->macro_node; | |
2606 | else | |
2607 | node = pfile->context->c.macro; | |
ae2348f6 | 2608 | |
c7e5d924 | 2609 | return node && node->value.macro && node->value.macro->syshdr; |
ae2348f6 | 2610 | } |
2611 | ||
02516fb9 | 2612 | /* Read each token in, until end of the current file. Directives are |
2613 | transparently processed. */ | |
79bd622b | 2614 | void |
f7fdd7a1 | 2615 | cpp_scan_nooutput (cpp_reader *pfile) |
79bd622b | 2616 | { |
6e04daf1 | 2617 | /* Request a CPP_EOF token at the end of this file, rather than |
2618 | transparently continuing with the including file. */ | |
2619 | pfile->buffer->return_at_eof = true; | |
2620 | ||
3eb3f293 | 2621 | pfile->state.discarding_output++; |
2622 | pfile->state.prevent_expansion++; | |
2623 | ||
7951771a | 2624 | if (CPP_OPTION (pfile, traditional)) |
2625 | while (_cpp_read_logical_line_trad (pfile)) | |
2626 | ; | |
2627 | else | |
2628 | while (cpp_get_token (pfile)->type != CPP_EOF) | |
2629 | ; | |
3eb3f293 | 2630 | |
2631 | pfile->state.discarding_output--; | |
2632 | pfile->state.prevent_expansion--; | |
79bd622b | 2633 | } |
2634 | ||
89768577 | 2635 | /* Step back one or more tokens obtained from the lexer. */ |
2636 | void | |
2637 | _cpp_backup_tokens_direct (cpp_reader *pfile, unsigned int count) | |
2638 | { | |
2639 | pfile->lookaheads += count; | |
2640 | while (count--) | |
2641 | { | |
2642 | pfile->cur_token--; | |
2643 | if (pfile->cur_token == pfile->cur_run->base | |
2644 | /* Possible with -fpreprocessed and no leading #line. */ | |
2645 | && pfile->cur_run->prev != NULL) | |
2646 | { | |
2647 | pfile->cur_run = pfile->cur_run->prev; | |
2648 | pfile->cur_token = pfile->cur_run->limit; | |
2649 | } | |
2650 | } | |
2651 | } | |
2652 | ||
add258d7 | 2653 | /* Step back one (or more) tokens. Can only step back more than 1 if |
fb5ab82c | 2654 | they are from the lexer, and not from macro expansion. */ |
920b5d41 | 2655 | void |
f7fdd7a1 | 2656 | _cpp_backup_tokens (cpp_reader *pfile, unsigned int count) |
79bd622b | 2657 | { |
fb5ab82c | 2658 | if (pfile->context->prev == NULL) |
89768577 | 2659 | _cpp_backup_tokens_direct (pfile, count); |
fb5ab82c | 2660 | else |
79bd622b | 2661 | { |
fb5ab82c | 2662 | if (count != 1) |
2663 | abort (); | |
ce70f433 | 2664 | if (pfile->context->tokens_kind == TOKENS_KIND_DIRECT) |
a854276a | 2665 | FIRST (pfile->context).token--; |
ce70f433 | 2666 | else if (pfile->context->tokens_kind == TOKENS_KIND_INDIRECT) |
a854276a | 2667 | FIRST (pfile->context).ptoken--; |
ce70f433 | 2668 | else if (pfile->context->tokens_kind == TOKENS_KIND_EXTENDED) |
2669 | { | |
2670 | FIRST (pfile->context).ptoken--; | |
2671 | if (pfile->context->c.macro) | |
2672 | { | |
2673 | macro_context *m = pfile->context->c.mc; | |
2674 | m->cur_virt_loc--; | |
2675 | #ifdef ENABLE_CHECKING | |
2676 | if (m->cur_virt_loc < m->virt_locs) | |
2677 | abort (); | |
2678 | #endif | |
2679 | } | |
2680 | else | |
2681 | abort (); | |
2682 | } | |
2683 | else | |
2684 | abort (); | |
79bd622b | 2685 | } |
2686 | } | |
69461e0d | 2687 | |
79bd622b | 2688 | /* #define directive parsing and handling. */ |
2689 | ||
d10cfa8d | 2690 | /* Returns nonzero if a macro redefinition warning is required. */ |
f15f6c8d | 2691 | static bool |
25692381 | 2692 | warn_of_redefinition (cpp_reader *pfile, cpp_hashnode *node, |
f7fdd7a1 | 2693 | const cpp_macro *macro2) |
79bd622b | 2694 | { |
2695 | const cpp_macro *macro1; | |
2696 | unsigned int i; | |
2697 | ||
31ca26b1 | 2698 | /* Some redefinitions need to be warned about regardless. */ |
2699 | if (node->flags & NODE_WARN) | |
f15f6c8d | 2700 | return true; |
79bd622b | 2701 | |
2ad0b097 | 2702 | /* Suppress warnings for builtins that lack the NODE_WARN flag. */ |
2703 | if (node->flags & NODE_BUILTIN) | |
25692381 | 2704 | { |
2705 | if (!pfile->cb.user_builtin_macro | |
2706 | || !pfile->cb.user_builtin_macro (pfile, node)) | |
2707 | return false; | |
2708 | } | |
2ad0b097 | 2709 | |
89768577 | 2710 | /* Redefinitions of conditional (context-sensitive) macros, on |
2711 | the other hand, must be allowed silently. */ | |
2712 | if (node->flags & NODE_CONDITIONAL) | |
2713 | return false; | |
2714 | ||
31ca26b1 | 2715 | /* Redefinition of a macro is allowed if and only if the old and new |
2c0e001b | 2716 | definitions are the same. (6.10.3 paragraph 2). */ |
79bd622b | 2717 | macro1 = node->value.macro; |
2718 | ||
3396dc80 | 2719 | /* Don't check count here as it can be different in valid |
2720 | traditional redefinitions with just whitespace differences. */ | |
2721 | if (macro1->paramc != macro2->paramc | |
79bd622b | 2722 | || macro1->fun_like != macro2->fun_like |
53c052ca | 2723 | || macro1->variadic != macro2->variadic) |
f15f6c8d | 2724 | return true; |
79bd622b | 2725 | |
2726 | /* Check parameter spellings. */ | |
2727 | for (i = 0; i < macro1->paramc; i++) | |
2728 | if (macro1->params[i] != macro2->params[i]) | |
f15f6c8d | 2729 | return true; |
79bd622b | 2730 | |
f15f6c8d | 2731 | /* Check the replacement text or tokens. */ |
2732 | if (CPP_OPTION (pfile, traditional)) | |
3396dc80 | 2733 | return _cpp_expansions_different_trad (macro1, macro2); |
f15f6c8d | 2734 | |
9c7ff5cc | 2735 | if (macro1->count != macro2->count) |
2736 | return true; | |
2737 | ||
2738 | for (i = 0; i < macro1->count; i++) | |
2739 | if (!_cpp_equiv_tokens (¯o1->exp.tokens[i], ¯o2->exp.tokens[i])) | |
2740 | return true; | |
f15f6c8d | 2741 | |
2742 | return false; | |
79bd622b | 2743 | } |
2744 | ||
2745 | /* Free the definition of hashnode H. */ | |
69461e0d | 2746 | void |
f7fdd7a1 | 2747 | _cpp_free_definition (cpp_hashnode *h) |
69461e0d | 2748 | { |
79bd622b | 2749 | /* Macros and assertions no longer have anything to free. */ |
2750 | h->type = NT_VOID; | |
2751 | /* Clear builtin flag in case of redefinition. */ | |
34c3de48 | 2752 | h->flags &= ~(NODE_BUILTIN | NODE_DISABLED | NODE_USED); |
79bd622b | 2753 | } |
2754 | ||
10b4496a | 2755 | /* Save parameter NODE to the parameter list of macro MACRO. Returns |
d10cfa8d | 2756 | zero on success, nonzero if the parameter is a duplicate. */ |
198b48a0 | 2757 | bool |
f7fdd7a1 | 2758 | _cpp_save_parameter (cpp_reader *pfile, cpp_macro *macro, cpp_hashnode *node) |
79bd622b | 2759 | { |
805e22b2 | 2760 | unsigned int len; |
79bd622b | 2761 | /* Constraint 6.10.3.6 - duplicate parameter names. */ |
805e22b2 | 2762 | if (node->flags & NODE_MACRO_ARG) |
11d10d3f | 2763 | { |
d80d2074 | 2764 | cpp_error (pfile, CPP_DL_ERROR, "duplicate macro parameter \"%s\"", |
73328dce | 2765 | NODE_NAME (node)); |
1ae6ed16 | 2766 | return true; |
79bd622b | 2767 | } |
11d10d3f | 2768 | |
e6a5f963 | 2769 | if (BUFF_ROOM (pfile->a_buff) |
2770 | < (macro->paramc + 1) * sizeof (cpp_hashnode *)) | |
2771 | _cpp_extend_buff (pfile, &pfile->a_buff, sizeof (cpp_hashnode *)); | |
11d10d3f | 2772 | |
e6a5f963 | 2773 | ((cpp_hashnode **) BUFF_FRONT (pfile->a_buff))[macro->paramc++] = node; |
805e22b2 | 2774 | node->flags |= NODE_MACRO_ARG; |
2775 | len = macro->paramc * sizeof (union _cpp_hashnode_value); | |
2776 | if (len > pfile->macro_buffer_len) | |
2777 | { | |
720aca92 | 2778 | pfile->macro_buffer = XRESIZEVEC (unsigned char, pfile->macro_buffer, |
2779 | len); | |
805e22b2 | 2780 | pfile->macro_buffer_len = len; |
2781 | } | |
2782 | ((union _cpp_hashnode_value *) pfile->macro_buffer)[macro->paramc - 1] | |
2783 | = node->value; | |
2784 | ||
2785 | node->value.arg_index = macro->paramc; | |
1ae6ed16 | 2786 | return false; |
69461e0d | 2787 | } |
2788 | ||
1ae6ed16 | 2789 | /* Check the syntax of the parameters in a MACRO definition. Returns |
2790 | false if an error occurs. */ | |
2791 | static bool | |
f7fdd7a1 | 2792 | parse_params (cpp_reader *pfile, cpp_macro *macro) |
69461e0d | 2793 | { |
79bd622b | 2794 | unsigned int prev_ident = 0; |
69461e0d | 2795 | |
79bd622b | 2796 | for (;;) |
69461e0d | 2797 | { |
c00e481c | 2798 | const cpp_token *token = _cpp_lex_token (pfile); |
69461e0d | 2799 | |
c00e481c | 2800 | switch (token->type) |
69461e0d | 2801 | { |
79bd622b | 2802 | default: |
d3f7919d | 2803 | /* Allow/ignore comments in parameter lists if we are |
2804 | preserving comments in macro expansions. */ | |
2805 | if (token->type == CPP_COMMENT | |
2806 | && ! CPP_OPTION (pfile, discard_comments_in_macro_exp)) | |
2807 | continue; | |
2808 | ||
d80d2074 | 2809 | cpp_error (pfile, CPP_DL_ERROR, |
73328dce | 2810 | "\"%s\" may not appear in macro parameter list", |
c00e481c | 2811 | cpp_token_as_text (pfile, token)); |
1ae6ed16 | 2812 | return false; |
79bd622b | 2813 | |
69461e0d | 2814 | case CPP_NAME: |
79bd622b | 2815 | if (prev_ident) |
2816 | { | |
d80d2074 | 2817 | cpp_error (pfile, CPP_DL_ERROR, |
73328dce | 2818 | "macro parameters must be comma-separated"); |
1ae6ed16 | 2819 | return false; |
79bd622b | 2820 | } |
2821 | prev_ident = 1; | |
2822 | ||
2ee04baa | 2823 | if (_cpp_save_parameter (pfile, macro, token->val.node.node)) |
1ae6ed16 | 2824 | return false; |
79bd622b | 2825 | continue; |
69461e0d | 2826 | |
79bd622b | 2827 | case CPP_CLOSE_PAREN: |
2828 | if (prev_ident || macro->paramc == 0) | |
1ae6ed16 | 2829 | return true; |
69461e0d | 2830 | |
79bd622b | 2831 | /* Fall through to pick up the error. */ |
2832 | case CPP_COMMA: | |
2833 | if (!prev_ident) | |
2834 | { | |
d80d2074 | 2835 | cpp_error (pfile, CPP_DL_ERROR, "parameter name missing"); |
1ae6ed16 | 2836 | return false; |
79bd622b | 2837 | } |
2838 | prev_ident = 0; | |
69461e0d | 2839 | continue; |
2840 | ||
79bd622b | 2841 | case CPP_ELLIPSIS: |
53c052ca | 2842 | macro->variadic = 1; |
79bd622b | 2843 | if (!prev_ident) |
2844 | { | |
198b48a0 | 2845 | _cpp_save_parameter (pfile, macro, |
2846 | pfile->spec_nodes.n__VA_ARGS__); | |
79bd622b | 2847 | pfile->state.va_args_ok = 1; |
05d51900 | 2848 | if (! CPP_OPTION (pfile, c99) |
5ae82d58 | 2849 | && CPP_OPTION (pfile, cpp_pedantic) |
05d51900 | 2850 | && CPP_OPTION (pfile, warn_variadic_macros)) |
49f161b6 | 2851 | { |
2852 | if (CPP_OPTION (pfile, cplusplus)) | |
2853 | cpp_pedwarning | |
2854 | (pfile, CPP_W_VARIADIC_MACROS, | |
2855 | "anonymous variadic macros were introduced in C++11"); | |
2856 | else | |
2857 | cpp_pedwarning | |
2858 | (pfile, CPP_W_VARIADIC_MACROS, | |
2859 | "anonymous variadic macros were introduced in C99"); | |
2860 | } | |
806fe15e | 2861 | else if (CPP_OPTION (pfile, cpp_warn_c90_c99_compat) > 0 |
890c2e2f | 2862 | && ! CPP_OPTION (pfile, cplusplus)) |
2863 | cpp_error (pfile, CPP_DL_WARNING, | |
2864 | "anonymous variadic macros were introduced in C99"); | |
79bd622b | 2865 | } |
5ae82d58 | 2866 | else if (CPP_OPTION (pfile, cpp_pedantic) |
05d51900 | 2867 | && CPP_OPTION (pfile, warn_variadic_macros)) |
49f161b6 | 2868 | { |
2869 | if (CPP_OPTION (pfile, cplusplus)) | |
2870 | cpp_pedwarning (pfile, CPP_W_VARIADIC_MACROS, | |
2871 | "ISO C++ does not permit named variadic macros"); | |
2872 | else | |
2873 | cpp_pedwarning (pfile, CPP_W_VARIADIC_MACROS, | |
3a79f5da | 2874 | "ISO C does not permit named variadic macros"); |
49f161b6 | 2875 | } |
69461e0d | 2876 | |
79bd622b | 2877 | /* We're at the end, and just expect a closing parenthesis. */ |
c00e481c | 2878 | token = _cpp_lex_token (pfile); |
2879 | if (token->type == CPP_CLOSE_PAREN) | |
1ae6ed16 | 2880 | return true; |
79bd622b | 2881 | /* Fall through. */ |
69461e0d | 2882 | |
79bd622b | 2883 | case CPP_EOF: |
d80d2074 | 2884 | cpp_error (pfile, CPP_DL_ERROR, "missing ')' in macro parameter list"); |
1ae6ed16 | 2885 | return false; |
69461e0d | 2886 | } |
69461e0d | 2887 | } |
79bd622b | 2888 | } |
2889 | ||
10b4496a | 2890 | /* Allocate room for a token from a macro's replacement list. */ |
79bd622b | 2891 | static cpp_token * |
f7fdd7a1 | 2892 | alloc_expansion_token (cpp_reader *pfile, cpp_macro *macro) |
79bd622b | 2893 | { |
e6a5f963 | 2894 | if (BUFF_ROOM (pfile->a_buff) < (macro->count + 1) * sizeof (cpp_token)) |
2895 | _cpp_extend_buff (pfile, &pfile->a_buff, sizeof (cpp_token)); | |
69461e0d | 2896 | |
e6a5f963 | 2897 | return &((cpp_token *) BUFF_FRONT (pfile->a_buff))[macro->count++]; |
10b4496a | 2898 | } |
2899 | ||
88cf66fa | 2900 | /* Lex a token from the expansion of MACRO, but mark parameters as we |
2901 | find them and warn of traditional stringification. */ | |
10b4496a | 2902 | static cpp_token * |
f7fdd7a1 | 2903 | lex_expansion_token (cpp_reader *pfile, cpp_macro *macro) |
10b4496a | 2904 | { |
e0ff7935 | 2905 | cpp_token *token, *saved_cur_token; |
10b4496a | 2906 | |
e0ff7935 | 2907 | saved_cur_token = pfile->cur_token; |
10b4496a | 2908 | pfile->cur_token = alloc_expansion_token (pfile, macro); |
2909 | token = _cpp_lex_direct (pfile); | |
e0ff7935 | 2910 | pfile->cur_token = saved_cur_token; |
79bd622b | 2911 | |
88cf66fa | 2912 | /* Is this a parameter? */ |
805e22b2 | 2913 | if (token->type == CPP_NAME |
2ee04baa | 2914 | && (token->val.node.node->flags & NODE_MACRO_ARG) != 0) |
79bd622b | 2915 | { |
2916 | token->type = CPP_MACRO_ARG; | |
2ee04baa | 2917 | token->val.macro_arg.arg_no = token->val.node.node->value.arg_index; |
79bd622b | 2918 | } |
2919 | else if (CPP_WTRADITIONAL (pfile) && macro->paramc > 0 | |
2920 | && (token->type == CPP_STRING || token->type == CPP_CHAR)) | |
2921 | check_trad_stringification (pfile, macro, &token->val.str); | |
2922 | ||
2923 | return token; | |
69461e0d | 2924 | } |
2925 | ||
f15f6c8d | 2926 | static bool |
f7fdd7a1 | 2927 | create_iso_definition (cpp_reader *pfile, cpp_macro *macro) |
69461e0d | 2928 | { |
f15f6c8d | 2929 | cpp_token *token; |
10b4496a | 2930 | const cpp_token *ctoken; |
3b6c638e | 2931 | bool following_paste_op = false; |
2932 | const char *paste_op_error_msg = | |
2933 | N_("'##' cannot appear at either end of a macro expansion"); | |
941f2388 | 2934 | unsigned int num_extra_tokens = 0; |
79bd622b | 2935 | |
2936 | /* Get the first token of the expansion (or the '(' of a | |
2937 | function-like macro). */ | |
10b4496a | 2938 | ctoken = _cpp_lex_token (pfile); |
2939 | ||
2940 | if (ctoken->type == CPP_OPEN_PAREN && !(ctoken->flags & PREV_WHITE)) | |
79bd622b | 2941 | { |
f15f6c8d | 2942 | bool ok = parse_params (pfile, macro); |
e6a5f963 | 2943 | macro->params = (cpp_hashnode **) BUFF_FRONT (pfile->a_buff); |
2944 | if (!ok) | |
f15f6c8d | 2945 | return false; |
e6a5f963 | 2946 | |
c39ed964 | 2947 | /* Success. Commit or allocate the parameter array. */ |
2948 | if (pfile->hash_table->alloc_subobject) | |
2949 | { | |
720aca92 | 2950 | cpp_hashnode **params = |
2951 | (cpp_hashnode **) pfile->hash_table->alloc_subobject | |
2952 | (sizeof (cpp_hashnode *) * macro->paramc); | |
bb30d1f4 | 2953 | memcpy (params, macro->params, |
2954 | sizeof (cpp_hashnode *) * macro->paramc); | |
2955 | macro->params = params; | |
c39ed964 | 2956 | } |
2957 | else | |
2958 | BUFF_FRONT (pfile->a_buff) = (uchar *) ¯o->params[macro->paramc]; | |
79bd622b | 2959 | macro->fun_like = 1; |
79bd622b | 2960 | } |
10b4496a | 2961 | else if (ctoken->type != CPP_EOF && !(ctoken->flags & PREV_WHITE)) |
99617355 | 2962 | { |
2963 | /* While ISO C99 requires whitespace before replacement text | |
49f161b6 | 2964 | in a macro definition, ISO C90 with TC1 allows characters |
2965 | from the basic source character set there. */ | |
99617355 | 2966 | if (CPP_OPTION (pfile, c99)) |
49f161b6 | 2967 | { |
2968 | if (CPP_OPTION (pfile, cplusplus)) | |
2969 | cpp_error (pfile, CPP_DL_PEDWARN, | |
2970 | "ISO C++11 requires whitespace after the macro name"); | |
2971 | else | |
2972 | cpp_error (pfile, CPP_DL_PEDWARN, | |
2973 | "ISO C99 requires whitespace after the macro name"); | |
2974 | } | |
99617355 | 2975 | else |
2976 | { | |
2977 | int warntype = CPP_DL_WARNING; | |
2978 | switch (ctoken->type) | |
2979 | { | |
2980 | case CPP_ATSIGN: | |
2981 | case CPP_AT_NAME: | |
2982 | case CPP_OBJC_STRING: | |
2983 | /* '@' is not in basic character set. */ | |
2984 | warntype = CPP_DL_PEDWARN; | |
2985 | break; | |
2986 | case CPP_OTHER: | |
2987 | /* Basic character set sans letters, digits and _. */ | |
2988 | if (strchr ("!\"#%&'()*+,-./:;<=>?[\\]^{|}~", | |
2989 | ctoken->val.str.text[0]) == NULL) | |
2990 | warntype = CPP_DL_PEDWARN; | |
2991 | break; | |
2992 | default: | |
2993 | /* All other tokens start with a character from basic | |
2994 | character set. */ | |
2995 | break; | |
2996 | } | |
2997 | cpp_error (pfile, warntype, | |
2998 | "missing whitespace after the macro name"); | |
2999 | } | |
3000 | } | |
69461e0d | 3001 | |
10b4496a | 3002 | if (macro->fun_like) |
3003 | token = lex_expansion_token (pfile, macro); | |
3004 | else | |
3005 | { | |
3006 | token = alloc_expansion_token (pfile, macro); | |
3007 | *token = *ctoken; | |
3008 | } | |
69461e0d | 3009 | |
79bd622b | 3010 | for (;;) |
3011 | { | |
3012 | /* Check the stringifying # constraint 6.10.3.2.1 of | |
3013 | function-like macros when lexing the subsequent token. */ | |
3014 | if (macro->count > 1 && token[-1].type == CPP_HASH && macro->fun_like) | |
3015 | { | |
3016 | if (token->type == CPP_MACRO_ARG) | |
3017 | { | |
941f2388 | 3018 | if (token->flags & PREV_WHITE) |
3019 | token->flags |= SP_PREV_WHITE; | |
3020 | if (token[-1].flags & DIGRAPH) | |
3021 | token->flags |= SP_DIGRAPH; | |
79bd622b | 3022 | token->flags &= ~PREV_WHITE; |
3023 | token->flags |= STRINGIFY_ARG; | |
3024 | token->flags |= token[-1].flags & PREV_WHITE; | |
3025 | token[-1] = token[0]; | |
3026 | macro->count--; | |
3027 | } | |
3028 | /* Let assembler get away with murder. */ | |
5db5d057 | 3029 | else if (CPP_OPTION (pfile, lang) != CLK_ASM) |
79bd622b | 3030 | { |
d80d2074 | 3031 | cpp_error (pfile, CPP_DL_ERROR, |
73328dce | 3032 | "'#' is not followed by a macro parameter"); |
f15f6c8d | 3033 | return false; |
79bd622b | 3034 | } |
3035 | } | |
3036 | ||
3037 | if (token->type == CPP_EOF) | |
3b6c638e | 3038 | { |
3039 | /* Paste operator constraint 6.10.3.3.1: | |
3040 | Token-paste ##, can appear in both object-like and | |
3041 | function-like macros, but not at the end. */ | |
3042 | if (following_paste_op) | |
3043 | { | |
3044 | cpp_error (pfile, CPP_DL_ERROR, paste_op_error_msg); | |
3045 | return false; | |
3046 | } | |
3047 | break; | |
3048 | } | |
79bd622b | 3049 | |
3050 | /* Paste operator constraint 6.10.3.3.1. */ | |
3051 | if (token->type == CPP_PASTE) | |
3052 | { | |
3053 | /* Token-paste ##, can appear in both object-like and | |
3b6c638e | 3054 | function-like macros, but not at the beginning. */ |
3055 | if (macro->count == 1) | |
79bd622b | 3056 | { |
3b6c638e | 3057 | cpp_error (pfile, CPP_DL_ERROR, paste_op_error_msg); |
f15f6c8d | 3058 | return false; |
79bd622b | 3059 | } |
69461e0d | 3060 | |
941f2388 | 3061 | if (token[-1].flags & PASTE_LEFT) |
3062 | { | |
3063 | macro->extra_tokens = 1; | |
3064 | num_extra_tokens++; | |
2ee04baa | 3065 | token->val.token_no = macro->count - 1; |
941f2388 | 3066 | } |
3067 | else | |
3068 | { | |
3069 | --macro->count; | |
3070 | token[-1].flags |= PASTE_LEFT; | |
3071 | if (token->flags & DIGRAPH) | |
3072 | token[-1].flags |= SP_DIGRAPH; | |
3073 | if (token->flags & PREV_WHITE) | |
3074 | token[-1].flags |= SP_PREV_WHITE; | |
3075 | } | |
79bd622b | 3076 | } |
3077 | ||
3b6c638e | 3078 | following_paste_op = (token->type == CPP_PASTE); |
79bd622b | 3079 | token = lex_expansion_token (pfile, macro); |
3080 | } | |
3081 | ||
672f38da | 3082 | macro->exp.tokens = (cpp_token *) BUFF_FRONT (pfile->a_buff); |
c39ed964 | 3083 | macro->traditional = 0; |
e6a5f963 | 3084 | |
3c7df4d3 | 3085 | /* Don't count the CPP_EOF. */ |
3086 | macro->count--; | |
79bd622b | 3087 | |
88cf66fa | 3088 | /* Clear whitespace on first token for warn_of_redefinition(). */ |
e6a5f963 | 3089 | if (macro->count) |
672f38da | 3090 | macro->exp.tokens[0].flags &= ~PREV_WHITE; |
e6a5f963 | 3091 | |
c39ed964 | 3092 | /* Commit or allocate the memory. */ |
3093 | if (pfile->hash_table->alloc_subobject) | |
3094 | { | |
720aca92 | 3095 | cpp_token *tokns = |
3096 | (cpp_token *) pfile->hash_table->alloc_subobject (sizeof (cpp_token) | |
3097 | * macro->count); | |
941f2388 | 3098 | if (num_extra_tokens) |
3099 | { | |
3100 | /* Place second and subsequent ## or %:%: tokens in | |
3101 | sequences of consecutive such tokens at the end of the | |
3102 | list to preserve information about where they appear, how | |
3103 | they are spelt and whether they are preceded by | |
3104 | whitespace without otherwise interfering with macro | |
3105 | expansion. */ | |
3106 | cpp_token *normal_dest = tokns; | |
3107 | cpp_token *extra_dest = tokns + macro->count - num_extra_tokens; | |
3108 | unsigned int i; | |
3109 | for (i = 0; i < macro->count; i++) | |
3110 | { | |
3111 | if (macro->exp.tokens[i].type == CPP_PASTE) | |
3112 | *extra_dest++ = macro->exp.tokens[i]; | |
3113 | else | |
3114 | *normal_dest++ = macro->exp.tokens[i]; | |
3115 | } | |
3116 | } | |
3117 | else | |
3118 | memcpy (tokns, macro->exp.tokens, sizeof (cpp_token) * macro->count); | |
c39ed964 | 3119 | macro->exp.tokens = tokns; |
3120 | } | |
3121 | else | |
3122 | BUFF_FRONT (pfile->a_buff) = (uchar *) ¯o->exp.tokens[macro->count]; | |
e6a5f963 | 3123 | |
f15f6c8d | 3124 | return true; |
3125 | } | |
3126 | ||
d10cfa8d | 3127 | /* Parse a macro and save its expansion. Returns nonzero on success. */ |
f15f6c8d | 3128 | bool |
f7fdd7a1 | 3129 | _cpp_create_definition (cpp_reader *pfile, cpp_hashnode *node) |
f15f6c8d | 3130 | { |
3131 | cpp_macro *macro; | |
3132 | unsigned int i; | |
3133 | bool ok; | |
4dab9f9f | 3134 | |
c39ed964 | 3135 | if (pfile->hash_table->alloc_subobject) |
720aca92 | 3136 | macro = (cpp_macro *) pfile->hash_table->alloc_subobject |
3137 | (sizeof (cpp_macro)); | |
c39ed964 | 3138 | else |
3139 | macro = (cpp_macro *) _cpp_aligned_alloc (pfile, sizeof (cpp_macro)); | |
f15f6c8d | 3140 | macro->line = pfile->directive_line; |
3141 | macro->params = 0; | |
3142 | macro->paramc = 0; | |
3143 | macro->variadic = 0; | |
b717e161 | 3144 | macro->used = !CPP_OPTION (pfile, warn_unused_macros); |
f15f6c8d | 3145 | macro->count = 0; |
3146 | macro->fun_like = 0; | |
941f2388 | 3147 | macro->extra_tokens = 0; |
ae2348f6 | 3148 | /* To suppress some diagnostics. */ |
610625e3 | 3149 | macro->syshdr = pfile->buffer && pfile->buffer->sysp != 0; |
ae2348f6 | 3150 | |
f15f6c8d | 3151 | if (CPP_OPTION (pfile, traditional)) |
3152 | ok = _cpp_create_trad_definition (pfile, macro); | |
3153 | else | |
3154 | { | |
f15f6c8d | 3155 | ok = create_iso_definition (pfile, macro); |
3156 | ||
e0ff7935 | 3157 | /* We set the type for SEEN_EOL() in directives.c. |
f15f6c8d | 3158 | |
3159 | Longer term we should lex the whole line before coming here, | |
3160 | and just copy the expansion. */ | |
f15f6c8d | 3161 | |
3162 | /* Stop the lexer accepting __VA_ARGS__. */ | |
3163 | pfile->state.va_args_ok = 0; | |
3164 | } | |
3165 | ||
3166 | /* Clear the fast argument lookup indices. */ | |
3167 | for (i = macro->paramc; i-- > 0; ) | |
805e22b2 | 3168 | { |
3169 | struct cpp_hashnode *node = macro->params[i]; | |
3170 | node->flags &= ~ NODE_MACRO_ARG; | |
3171 | node->value = ((union _cpp_hashnode_value *) pfile->macro_buffer)[i]; | |
3172 | } | |
f15f6c8d | 3173 | |
3174 | if (!ok) | |
3175 | return ok; | |
3176 | ||
70145d81 | 3177 | if (node->type == NT_MACRO) |
69461e0d | 3178 | { |
71a7c282 | 3179 | if (CPP_OPTION (pfile, warn_unused_macros)) |
3180 | _cpp_warn_if_unused_macro (pfile, node, NULL); | |
3181 | ||
f15f6c8d | 3182 | if (warn_of_redefinition (pfile, node, macro)) |
69461e0d | 3183 | { |
3a79f5da | 3184 | const int reason = (node->flags & NODE_BUILTIN) |
3185 | ? CPP_W_BUILTIN_MACRO_REDEFINED : CPP_W_NONE; | |
7f5f3953 | 3186 | bool warned; |
3a79f5da | 3187 | |
3188 | warned = cpp_pedwarning_with_line (pfile, reason, | |
3189 | pfile->directive_line, 0, | |
3190 | "\"%s\" redefined", | |
3191 | NODE_NAME (node)); | |
79bd622b | 3192 | |
7f5f3953 | 3193 | if (warned && node->type == NT_MACRO && !(node->flags & NODE_BUILTIN)) |
3194 | cpp_error_with_line (pfile, CPP_DL_NOTE, | |
f15f6c8d | 3195 | node->value.macro->line, 0, |
3196 | "this is the location of the previous definition"); | |
69461e0d | 3197 | } |
69461e0d | 3198 | } |
3199 | ||
70145d81 | 3200 | if (node->type != NT_VOID) |
3201 | _cpp_free_definition (node); | |
3202 | ||
69461e0d | 3203 | /* Enter definition in hash table. */ |
79bd622b | 3204 | node->type = NT_MACRO; |
3205 | node->value.macro = macro; | |
5eb3761c | 3206 | if (! ustrncmp (NODE_NAME (node), DSC ("__STDC_")) |
a56d0856 | 3207 | && ustrcmp (NODE_NAME (node), (const uchar *) "__STDC_FORMAT_MACROS") |
3208 | /* __STDC_LIMIT_MACROS and __STDC_CONSTANT_MACROS are mentioned | |
3209 | in the C standard, as something that one must use in C++. | |
49f161b6 | 3210 | However DR#593 and C++11 indicate that they play no role in C++. |
3211 | We special-case them anyway. */ | |
a56d0856 | 3212 | && ustrcmp (NODE_NAME (node), (const uchar *) "__STDC_LIMIT_MACROS") |
3213 | && ustrcmp (NODE_NAME (node), (const uchar *) "__STDC_CONSTANT_MACROS")) | |
31ca26b1 | 3214 | node->flags |= NODE_WARN; |
69461e0d | 3215 | |
89768577 | 3216 | /* If user defines one of the conditional macros, remove the |
3217 | conditional flag */ | |
3218 | node->flags &= ~NODE_CONDITIONAL; | |
3219 | ||
79bd622b | 3220 | return ok; |
69461e0d | 3221 | } |
3222 | ||
88cf66fa | 3223 | /* Warn if a token in STRING matches one of a function-like MACRO's |
3224 | parameters. */ | |
bceb9193 | 3225 | static void |
f7fdd7a1 | 3226 | check_trad_stringification (cpp_reader *pfile, const cpp_macro *macro, |
3227 | const cpp_string *string) | |
bceb9193 | 3228 | { |
79bd622b | 3229 | unsigned int i, len; |
4970d4c2 | 3230 | const uchar *p, *q, *limit; |
b1a9ff83 | 3231 | |
bceb9193 | 3232 | /* Loop over the string. */ |
4970d4c2 | 3233 | limit = string->text + string->len - 1; |
3234 | for (p = string->text + 1; p < limit; p = q) | |
bceb9193 | 3235 | { |
bceb9193 | 3236 | /* Find the start of an identifier. */ |
7e118154 | 3237 | while (p < limit && !is_idstart (*p)) |
3238 | p++; | |
bceb9193 | 3239 | |
3240 | /* Find the end of the identifier. */ | |
3241 | q = p; | |
7e118154 | 3242 | while (q < limit && is_idchar (*q)) |
3243 | q++; | |
79bd622b | 3244 | |
3245 | len = q - p; | |
3246 | ||
bceb9193 | 3247 | /* Loop over the function macro arguments to see if the |
3248 | identifier inside the string matches one of them. */ | |
79bd622b | 3249 | for (i = 0; i < macro->paramc; i++) |
3250 | { | |
3251 | const cpp_hashnode *node = macro->params[i]; | |
bceb9193 | 3252 | |
0d086e18 | 3253 | if (NODE_LEN (node) == len |
3254 | && !memcmp (p, NODE_NAME (node), len)) | |
bceb9193 | 3255 | { |
d80d2074 | 3256 | cpp_error (pfile, CPP_DL_WARNING, |
455730ef | 3257 | "macro argument \"%s\" would be stringified in traditional C", |
73328dce | 3258 | NODE_NAME (node)); |
bceb9193 | 3259 | break; |
3260 | } | |
3261 | } | |
3262 | } | |
3263 | } | |
79bd622b | 3264 | |
4d9e9a28 | 3265 | /* Returns the name, arguments and expansion of a macro, in a format |
3266 | suitable to be read back in again, and therefore also for DWARF 2 | |
3267 | debugging info. e.g. "PASTE(X, Y) X ## Y", or "MACNAME EXPANSION". | |
3268 | Caller is expected to generate the "#define" bit if needed. The | |
79bd622b | 3269 | returned text is temporary, and automatically freed later. */ |
79bd622b | 3270 | const unsigned char * |
25692381 | 3271 | cpp_macro_definition (cpp_reader *pfile, cpp_hashnode *node) |
79bd622b | 3272 | { |
3273 | unsigned int i, len; | |
25692381 | 3274 | const cpp_macro *macro; |
79bd622b | 3275 | unsigned char *buffer; |
3276 | ||
3277 | if (node->type != NT_MACRO || (node->flags & NODE_BUILTIN)) | |
3278 | { | |
25692381 | 3279 | if (node->type != NT_MACRO |
3280 | || !pfile->cb.user_builtin_macro | |
3281 | || !pfile->cb.user_builtin_macro (pfile, node)) | |
3282 | { | |
3283 | cpp_error (pfile, CPP_DL_ICE, | |
3284 | "invalid hash type %d in cpp_macro_definition", | |
3285 | node->type); | |
3286 | return 0; | |
3287 | } | |
79bd622b | 3288 | } |
3289 | ||
25692381 | 3290 | macro = node->value.macro; |
79bd622b | 3291 | /* Calculate length. */ |
f6bf950b | 3292 | len = NODE_LEN (node) + 2; /* ' ' and NUL. */ |
79bd622b | 3293 | if (macro->fun_like) |
3294 | { | |
3a68fd94 | 3295 | len += 4; /* "()" plus possible final ".." of named |
3296 | varargs (we have + 1 below). */ | |
79bd622b | 3297 | for (i = 0; i < macro->paramc; i++) |
3a68fd94 | 3298 | len += NODE_LEN (macro->params[i]) + 1; /* "," */ |
79bd622b | 3299 | } |
3300 | ||
9936e07d | 3301 | /* This should match below where we fill in the buffer. */ |
9c343313 | 3302 | if (CPP_OPTION (pfile, traditional)) |
3303 | len += _cpp_replacement_text_len (macro); | |
3304 | else | |
79bd622b | 3305 | { |
941f2388 | 3306 | unsigned int count = macro_real_token_count (macro); |
3307 | for (i = 0; i < count; i++) | |
9c343313 | 3308 | { |
3309 | cpp_token *token = ¯o->exp.tokens[i]; | |
79bd622b | 3310 | |
9c343313 | 3311 | if (token->type == CPP_MACRO_ARG) |
2ee04baa | 3312 | len += NODE_LEN (macro->params[token->val.macro_arg.arg_no - 1]); |
9c343313 | 3313 | else |
9936e07d | 3314 | len += cpp_token_len (token); |
3315 | ||
9c343313 | 3316 | if (token->flags & STRINGIFY_ARG) |
3317 | len++; /* "#" */ | |
3318 | if (token->flags & PASTE_LEFT) | |
3319 | len += 3; /* " ##" */ | |
9936e07d | 3320 | if (token->flags & PREV_WHITE) |
3321 | len++; /* " " */ | |
9c343313 | 3322 | } |
79bd622b | 3323 | } |
3324 | ||
3325 | if (len > pfile->macro_buffer_len) | |
8744fb7e | 3326 | { |
720aca92 | 3327 | pfile->macro_buffer = XRESIZEVEC (unsigned char, |
3328 | pfile->macro_buffer, len); | |
8744fb7e | 3329 | pfile->macro_buffer_len = len; |
3330 | } | |
4d9e9a28 | 3331 | |
3332 | /* Fill in the buffer. Start with the macro name. */ | |
79bd622b | 3333 | buffer = pfile->macro_buffer; |
4d9e9a28 | 3334 | memcpy (buffer, NODE_NAME (node), NODE_LEN (node)); |
3335 | buffer += NODE_LEN (node); | |
79bd622b | 3336 | |
3337 | /* Parameter names. */ | |
3338 | if (macro->fun_like) | |
3339 | { | |
3340 | *buffer++ = '('; | |
3341 | for (i = 0; i < macro->paramc; i++) | |
3342 | { | |
3343 | cpp_hashnode *param = macro->params[i]; | |
3344 | ||
3345 | if (param != pfile->spec_nodes.n__VA_ARGS__) | |
3346 | { | |
c86dbc5b | 3347 | memcpy (buffer, NODE_NAME (param), NODE_LEN (param)); |
3348 | buffer += NODE_LEN (param); | |
79bd622b | 3349 | } |
3350 | ||
3351 | if (i + 1 < macro->paramc) | |
b1a9ff83 | 3352 | /* Don't emit a space after the comma here; we're trying |
3353 | to emit a Dwarf-friendly definition, and the Dwarf spec | |
3354 | forbids spaces in the argument list. */ | |
3a68fd94 | 3355 | *buffer++ = ','; |
53c052ca | 3356 | else if (macro->variadic) |
79bd622b | 3357 | *buffer++ = '.', *buffer++ = '.', *buffer++ = '.'; |
3358 | } | |
3359 | *buffer++ = ')'; | |
3360 | } | |
3361 | ||
920e5093 | 3362 | /* The Dwarf spec requires a space after the macro name, even if the |
3363 | definition is the empty string. */ | |
3364 | *buffer++ = ' '; | |
3365 | ||
9c343313 | 3366 | if (CPP_OPTION (pfile, traditional)) |
3367 | buffer = _cpp_copy_replacement_text (macro, buffer); | |
3368 | else if (macro->count) | |
79bd622b | 3369 | /* Expansion tokens. */ |
79bd622b | 3370 | { |
941f2388 | 3371 | unsigned int count = macro_real_token_count (macro); |
3372 | for (i = 0; i < count; i++) | |
79bd622b | 3373 | { |
672f38da | 3374 | cpp_token *token = ¯o->exp.tokens[i]; |
79bd622b | 3375 | |
3376 | if (token->flags & PREV_WHITE) | |
3377 | *buffer++ = ' '; | |
3378 | if (token->flags & STRINGIFY_ARG) | |
3379 | *buffer++ = '#'; | |
3380 | ||
3381 | if (token->type == CPP_MACRO_ARG) | |
3382 | { | |
c86dbc5b | 3383 | memcpy (buffer, |
2ee04baa | 3384 | NODE_NAME (macro->params[token->val.macro_arg.arg_no - 1]), |
3385 | NODE_LEN (macro->params[token->val.macro_arg.arg_no - 1])); | |
3386 | buffer += NODE_LEN (macro->params[token->val.macro_arg.arg_no - 1]); | |
79bd622b | 3387 | } |
3388 | else | |
bb1fa6bb | 3389 | buffer = cpp_spell_token (pfile, token, buffer, false); |
79bd622b | 3390 | |
3391 | if (token->flags & PASTE_LEFT) | |
3392 | { | |
3393 | *buffer++ = ' '; | |
3394 | *buffer++ = '#'; | |
3395 | *buffer++ = '#'; | |
3396 | /* Next has PREV_WHITE; see _cpp_create_definition. */ | |
3397 | } | |
3398 | } | |
3399 | } | |
3400 | ||
3401 | *buffer = '\0'; | |
3402 | return pfile->macro_buffer; | |
3403 | } |