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Commit | Line | Data |
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7f2935c7 | 1 | /* CPP main program, using CPP Library. |
5e7b4e25 | 2 | Copyright (C) 1995, 1997, 1998, 1999, 2000 Free Software Foundation, Inc. |
7f2935c7 PB |
3 | Written by Per Bothner, 1994-95. |
4 | ||
5 | This program is free software; you can redistribute it and/or modify it | |
6 | under the terms of the GNU General Public License as published by the | |
7 | Free Software Foundation; either version 2, or (at your option) any | |
8 | later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program; if not, write to the Free Software | |
940d9d63 | 17 | Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
7f2935c7 PB |
18 | |
19 | In other words, you are welcome to use, share and improve this program. | |
20 | You are forbidden to forbid anyone else to use, share and improve | |
21 | what you give them. Help stamp out software-hoarding! */ | |
22 | ||
84ee6fd4 | 23 | #include "config.h" |
b04cd507 | 24 | #include "system.h" |
b04cd507 | 25 | #include "cpplib.h" |
ab87f8c8 | 26 | #include "intl.h" |
7f2935c7 | 27 | |
93c80368 NB |
28 | /* Encapsulates state used to convert the stream of tokens coming from |
29 | cpp_get_token back into a text file. */ | |
30 | struct printer | |
31 | { | |
32 | FILE *outf; /* stream to write to. */ | |
33 | const char *last_fname; /* previous file name. */ | |
34 | const char *syshdr_flags; /* system header flags, if any. */ | |
35 | unsigned int lineno; /* line currently being written. */ | |
36 | unsigned char printed; /* nonzero if something output at lineno. */ | |
37 | unsigned char no_line_dirs; /* nonzero to output no line directives. */ | |
38 | }; | |
7f2935c7 | 39 | |
58fea6af | 40 | int main PARAMS ((int, char **)); |
cf44ea52 NB |
41 | static void general_init PARAMS ((const char *)); |
42 | static void setup_callbacks PARAMS ((void)); | |
58fea6af | 43 | |
93c80368 NB |
44 | /* General output routines. */ |
45 | static void scan_buffer PARAMS ((cpp_reader *)); | |
dfbf62ec | 46 | static void check_multiline_token PARAMS ((cpp_string *)); |
93c80368 | 47 | static int printer_init PARAMS ((cpp_reader *)); |
926c5678 | 48 | static int dump_macro PARAMS ((cpp_reader *, cpp_hashnode *, void *)); |
93c80368 NB |
49 | |
50 | static void print_line PARAMS ((const char *)); | |
51 | static void maybe_print_line PARAMS ((unsigned int)); | |
93c80368 | 52 | |
58fea6af ZW |
53 | /* Callback routines for the parser. Most of these are active only |
54 | in specific modes. */ | |
55 | static void cb_define PARAMS ((cpp_reader *, cpp_hashnode *)); | |
56 | static void cb_undef PARAMS ((cpp_reader *, cpp_hashnode *)); | |
57 | static void cb_include PARAMS ((cpp_reader *, const unsigned char *, | |
93c80368 NB |
58 | const cpp_token *)); |
59 | static void cb_ident PARAMS ((cpp_reader *, const cpp_string *)); | |
eb1f4d9d | 60 | static void cb_file_change PARAMS ((cpp_reader *, const cpp_file_change *)); |
58fea6af | 61 | static void cb_def_pragma PARAMS ((cpp_reader *)); |
58fea6af | 62 | static void do_pragma_implementation PARAMS ((cpp_reader *)); |
93c80368 | 63 | |
cf44ea52 NB |
64 | const char *progname; /* Needs to be global. */ |
65 | static cpp_reader *pfile; | |
926c5678 | 66 | static struct printer print; |
58fea6af | 67 | |
7f2935c7 PB |
68 | int |
69 | main (argc, argv) | |
70 | int argc; | |
71 | char **argv; | |
72 | { | |
0f41302f | 73 | int argi = 1; /* Next argument to handle. */ |
7f2935c7 | 74 | |
cf44ea52 | 75 | general_init (argv[0]); |
dd07b884 | 76 | /* Default language is GNU C89. */ |
cf44ea52 | 77 | pfile = cpp_create_reader (CLK_GNUC89); |
7f2935c7 | 78 | |
ae79697b ZW |
79 | argi += cpp_handle_options (pfile, argc - argi , argv + argi); |
80 | if (argi < argc && ! CPP_FATAL_ERRORS (pfile)) | |
81 | cpp_fatal (pfile, "Invalid option %s", argv[argi]); | |
96302433 | 82 | cpp_post_options (pfile); |
ae79697b | 83 | if (CPP_FATAL_ERRORS (pfile)) |
bcc5cac9 | 84 | return (FATAL_EXIT_CODE); |
7f2935c7 | 85 | |
f4cdc368 ZW |
86 | /* If cpp_handle_options saw --help or --version on the command |
87 | line, it will have set pfile->help_only to indicate this. Exit | |
88 | successfully. [The library does not exit itself, because | |
89 | e.g. cc1 needs to print its own --help message at this point.] */ | |
90 | if (pfile->help_only) | |
91 | return (SUCCESS_EXIT_CODE); | |
92 | ||
f2d5f0cc ZW |
93 | /* Open the output now. We must do so even if no_output is on, |
94 | because there may be other output than from the actual | |
95 | preprocessing (e.g. from -dM). */ | |
93c80368 | 96 | if (printer_init (pfile)) |
bcc5cac9 | 97 | return (FATAL_EXIT_CODE); |
58fea6af | 98 | |
cf44ea52 | 99 | setup_callbacks (); |
7f2935c7 | 100 | |
93c80368 | 101 | if (! cpp_start_read (pfile, CPP_OPTION (pfile, in_fname))) |
f2d5f0cc ZW |
102 | return (FATAL_EXIT_CODE); |
103 | ||
93c80368 NB |
104 | if (CPP_BUFFER (pfile)) |
105 | { | |
106 | if (CPP_OPTION (pfile, no_output)) | |
8dc4676d | 107 | cpp_scan_buffer_nooutput (pfile, 1); |
93c80368 NB |
108 | else |
109 | scan_buffer (pfile); | |
110 | } | |
7f2935c7 | 111 | |
93c80368 | 112 | /* -dM command line option. */ |
58fea6af | 113 | if (CPP_OPTION (pfile, dump_macros) == dump_only) |
926c5678 | 114 | cpp_forall_identifiers (pfile, dump_macro, NULL); |
93c80368 NB |
115 | |
116 | cpp_finish (pfile); | |
ae79697b | 117 | cpp_cleanup (pfile); |
a9ae4483 | 118 | |
93c80368 NB |
119 | /* Flush any pending output. */ |
120 | if (print.printed) | |
121 | putc ('\n', print.outf); | |
122 | if (ferror (print.outf) || fclose (print.outf)) | |
123 | cpp_notice_from_errno (pfile, CPP_OPTION (pfile, out_fname)); | |
124 | ||
cf44ea52 | 125 | if (pfile->errors) |
bcc5cac9 KG |
126 | return (FATAL_EXIT_CODE); |
127 | return (SUCCESS_EXIT_CODE); | |
7f2935c7 | 128 | } |
58fea6af | 129 | |
cf44ea52 NB |
130 | /* Store the program name, and set the locale. */ |
131 | static void | |
132 | general_init (const char *argv0) | |
133 | { | |
134 | progname = argv0 + strlen (argv0); | |
135 | ||
136 | while (progname != argv0 && ! IS_DIR_SEPARATOR (progname[-1])) | |
137 | --progname; | |
138 | ||
139 | xmalloc_set_program_name (progname); | |
140 | ||
04650349 PT |
141 | /* LC_CTYPE determines the character set used by the terminal so it has be set |
142 | to output messages correctly. */ | |
143 | ||
cf44ea52 | 144 | #ifdef HAVE_LC_MESSAGES |
04650349 | 145 | setlocale (LC_CTYPE, ""); |
cf44ea52 | 146 | setlocale (LC_MESSAGES, ""); |
04650349 PT |
147 | #else |
148 | setlocale (LC_ALL, ""); | |
cf44ea52 | 149 | #endif |
04650349 | 150 | |
cf44ea52 NB |
151 | (void) bindtextdomain (PACKAGE, localedir); |
152 | (void) textdomain (PACKAGE); | |
153 | } | |
154 | ||
155 | /* Set up the callbacks and register the pragmas we handle. */ | |
156 | static void | |
157 | setup_callbacks () | |
158 | { | |
159 | /* Set callbacks. */ | |
160 | if (! CPP_OPTION (pfile, no_output)) | |
161 | { | |
162 | pfile->cb.ident = cb_ident; | |
163 | pfile->cb.def_pragma = cb_def_pragma; | |
164 | if (! CPP_OPTION (pfile, no_line_commands)) | |
eb1f4d9d | 165 | pfile->cb.file_change = cb_file_change; |
cf44ea52 NB |
166 | } |
167 | ||
168 | if (CPP_OPTION (pfile, dump_includes)) | |
169 | pfile->cb.include = cb_include; | |
170 | ||
5c5d1ea0 | 171 | if (CPP_OPTION (pfile, dump_macros) == dump_names |
cf44ea52 NB |
172 | || CPP_OPTION (pfile, dump_macros) == dump_definitions) |
173 | { | |
174 | pfile->cb.define = cb_define; | |
175 | pfile->cb.undef = cb_undef; | |
176 | pfile->cb.poison = cb_def_pragma; | |
177 | } | |
178 | ||
179 | /* Register one #pragma which needs special handling. */ | |
180 | cpp_register_pragma(pfile, 0, "implementation", do_pragma_implementation); | |
181 | cpp_register_pragma(pfile, "GCC", "implementation", do_pragma_implementation); | |
182 | } | |
183 | ||
93c80368 NB |
184 | /* Writes out the preprocessed file. Alternates between two tokens, |
185 | so that we can avoid accidental token pasting. */ | |
186 | static void | |
187 | scan_buffer (pfile) | |
188 | cpp_reader *pfile; | |
189 | { | |
190 | unsigned int index, line; | |
191 | cpp_token tokens[2], *token; | |
58fea6af | 192 | |
93c80368 NB |
193 | do |
194 | { | |
195 | for (index = 0;; index = 1 - index) | |
196 | { | |
197 | token = &tokens[index]; | |
198 | cpp_get_token (pfile, token); | |
199 | ||
200 | if (token->type == CPP_EOF) | |
201 | break; | |
202 | ||
203 | line = cpp_get_line (pfile)->output_line; | |
204 | if (print.lineno != line) | |
205 | { | |
206 | unsigned int col = cpp_get_line (pfile)->col; | |
207 | ||
208 | /* Supply enough whitespace to put this token in its original | |
209 | column. Don't bother trying to reconstruct tabs; we can't | |
210 | get it right in general, and nothing ought to care. (Yes, | |
211 | some things do care; the fault lies with them.) */ | |
212 | maybe_print_line (line); | |
213 | if (col > 1) | |
214 | { | |
215 | if (token->flags & PREV_WHITE) | |
216 | col--; | |
217 | while (--col) | |
218 | putc (' ', print.outf); | |
219 | } | |
220 | } | |
3a59c77c RH |
221 | else if (print.printed |
222 | && ! (token->flags & PREV_WHITE) | |
bdb05a7b | 223 | && CPP_OPTION (pfile, lang) != CLK_ASM |
93c80368 NB |
224 | && cpp_avoid_paste (pfile, &tokens[1 - index], token)) |
225 | token->flags |= PREV_WHITE; | |
226 | ||
227 | cpp_output_token (token, print.outf); | |
228 | print.printed = 1; | |
dfbf62ec NB |
229 | if (token->type == CPP_STRING || token->type == CPP_WSTRING |
230 | || token->type == CPP_COMMENT) | |
231 | check_multiline_token (&token->val.str); | |
93c80368 NB |
232 | } |
233 | } | |
234 | while (cpp_pop_buffer (pfile) != 0); | |
235 | } | |
236 | ||
dfbf62ec NB |
237 | /* Adjust print.lineno for newlines embedded in tokens. */ |
238 | static void | |
239 | check_multiline_token (str) | |
240 | cpp_string *str; | |
241 | { | |
242 | unsigned int i; | |
243 | ||
244 | for (i = 0; i < str->len; i++) | |
245 | if (str->text[i] == '\n') | |
246 | print.lineno++; | |
247 | } | |
248 | ||
93c80368 NB |
249 | /* Initialize a cpp_printer structure. As a side effect, open the |
250 | output file. */ | |
251 | static int | |
252 | printer_init (pfile) | |
253 | cpp_reader *pfile; | |
254 | { | |
255 | print.last_fname = 0; | |
256 | print.lineno = 0; | |
257 | print.printed = 0; | |
258 | print.no_line_dirs = CPP_OPTION (pfile, no_line_commands); | |
259 | ||
260 | if (CPP_OPTION (pfile, out_fname) == NULL) | |
261 | CPP_OPTION (pfile, out_fname) = ""; | |
262 | ||
263 | if (CPP_OPTION (pfile, out_fname)[0] == '\0') | |
264 | print.outf = stdout; | |
265 | else | |
266 | { | |
267 | print.outf = fopen (CPP_OPTION (pfile, out_fname), "w"); | |
268 | if (! print.outf) | |
269 | { | |
270 | cpp_notice_from_errno (pfile, CPP_OPTION (pfile, out_fname)); | |
271 | return 1; | |
272 | } | |
273 | } | |
274 | return 0; | |
275 | } | |
276 | ||
277 | /* Newline-terminate any output line currently in progress. If | |
278 | appropriate, write the current line number to the output, or pad | |
279 | with newlines so the output line matches the current line. */ | |
58fea6af | 280 | static void |
93c80368 NB |
281 | maybe_print_line (line) |
282 | unsigned int line; | |
283 | { | |
284 | /* End the previous line of text (probably only needed until we get | |
285 | multi-line tokens fixed). */ | |
286 | if (print.printed) | |
287 | { | |
288 | putc ('\n', print.outf); | |
289 | print.lineno++; | |
290 | print.printed = 0; | |
291 | } | |
292 | ||
293 | if (print.no_line_dirs) | |
3cab4133 NB |
294 | { |
295 | print.lineno = line; | |
296 | return; | |
297 | } | |
93c80368 | 298 | |
ad2a084d NB |
299 | /* print.lineno is zero if this is the first token of the file. We |
300 | handle this specially, so that a first line of "# 1 "foo.c" in | |
301 | file foo.i outputs just the foo.c line, and not a foo.i line. */ | |
302 | if (line >= print.lineno && line < print.lineno + 8 && print.lineno) | |
93c80368 NB |
303 | { |
304 | while (line > print.lineno) | |
305 | { | |
306 | putc ('\n', print.outf); | |
307 | print.lineno++; | |
308 | } | |
309 | } | |
310 | else | |
311 | { | |
312 | print.lineno = line; | |
313 | print_line (""); | |
314 | } | |
315 | } | |
316 | ||
317 | static void | |
318 | print_line (special_flags) | |
319 | const char *special_flags; | |
320 | { | |
321 | /* End any previous line of text. */ | |
322 | if (print.printed) | |
323 | putc ('\n', print.outf); | |
324 | print.printed = 0; | |
325 | ||
326 | fprintf (print.outf, "# %u \"%s\"%s%s\n", | |
327 | print.lineno, print.last_fname, special_flags, print.syshdr_flags); | |
328 | } | |
329 | ||
93c80368 NB |
330 | /* Callbacks */ |
331 | ||
332 | static void | |
333 | cb_ident (pfile, str) | |
334 | cpp_reader *pfile ATTRIBUTE_UNUSED; | |
335 | const cpp_string * str; | |
58fea6af | 336 | { |
93c80368 NB |
337 | maybe_print_line (cpp_get_line (pfile)->output_line); |
338 | fprintf (print.outf, "#ident \"%.*s\"\n", (int) str->len, str->text); | |
339 | print.lineno++; | |
58fea6af ZW |
340 | } |
341 | ||
342 | static void | |
93c80368 | 343 | cb_define (pfile, node) |
58fea6af | 344 | cpp_reader *pfile; |
93c80368 | 345 | cpp_hashnode *node; |
58fea6af | 346 | { |
5ef865d5 ZW |
347 | if (pfile->done_initializing) |
348 | { | |
93c80368 NB |
349 | maybe_print_line (cpp_get_line (pfile)->output_line); |
350 | fprintf (print.outf, "#define %s", node->name); | |
351 | ||
5c5d1ea0 NB |
352 | /* -dD command line option. */ |
353 | if (CPP_OPTION (pfile, dump_macros) == dump_definitions) | |
93c80368 NB |
354 | fputs ((const char *) cpp_macro_definition (pfile, node), print.outf); |
355 | ||
356 | putc ('\n', print.outf); | |
357 | print.lineno++; | |
5ef865d5 | 358 | } |
58fea6af ZW |
359 | } |
360 | ||
361 | static void | |
93c80368 | 362 | cb_undef (pfile, node) |
58fea6af | 363 | cpp_reader *pfile; |
93c80368 | 364 | cpp_hashnode *node; |
58fea6af | 365 | { |
5ef865d5 | 366 | if (pfile->done_initializing) |
3cb553b4 | 367 | { |
93c80368 NB |
368 | maybe_print_line (cpp_get_line (pfile)->output_line); |
369 | fprintf (print.outf, "#undef %s\n", node->name); | |
370 | print.lineno++; | |
3cb553b4 | 371 | } |
58fea6af ZW |
372 | } |
373 | ||
374 | static void | |
93c80368 NB |
375 | cb_include (pfile, dir, header) |
376 | cpp_reader *pfile ATTRIBUTE_UNUSED; | |
58fea6af | 377 | const unsigned char *dir; |
93c80368 | 378 | const cpp_token *header; |
58fea6af | 379 | { |
93c80368 NB |
380 | maybe_print_line (cpp_get_line (pfile)->output_line); |
381 | fprintf (print.outf, "#%s %s\n", dir, cpp_token_as_text (pfile, header)); | |
382 | print.lineno++; | |
58fea6af ZW |
383 | } |
384 | ||
385 | static void | |
eb1f4d9d | 386 | cb_file_change (pfile, fc) |
27e2564a NB |
387 | cpp_reader *pfile ATTRIBUTE_UNUSED; |
388 | const cpp_file_change *fc; | |
58fea6af | 389 | { |
27e2564a NB |
390 | /* Bring current file to correct line (except first file). */ |
391 | if (fc->reason == FC_ENTER && fc->from.filename) | |
392 | maybe_print_line (fc->from.lineno); | |
393 | ||
27e2564a NB |
394 | print.last_fname = fc->to.filename; |
395 | if (fc->externc) | |
396 | print.syshdr_flags = " 3 4"; | |
397 | else if (fc->sysp) | |
398 | print.syshdr_flags = " 3"; | |
399 | else | |
400 | print.syshdr_flags = ""; | |
58fea6af | 401 | |
ad2a084d | 402 | if (print.lineno) |
27e2564a | 403 | { |
dfbf62ec | 404 | const char *flags = ""; |
58fea6af | 405 | |
dfbf62ec NB |
406 | print.lineno = fc->to.lineno; |
407 | if (fc->reason == FC_ENTER) | |
408 | flags = " 1"; | |
409 | else if (fc->reason == FC_LEAVE) | |
410 | flags = " 2"; | |
ad2a084d NB |
411 | print_line (flags); |
412 | } | |
9ec7291f ZW |
413 | } |
414 | ||
58fea6af ZW |
415 | static void |
416 | cb_def_pragma (pfile) | |
417 | cpp_reader *pfile; | |
418 | { | |
93c80368 NB |
419 | maybe_print_line (cpp_get_line (pfile)->output_line); |
420 | fputs ("#pragma ", print.outf); | |
421 | cpp_output_line (pfile, print.outf); | |
422 | print.lineno++; | |
58fea6af ZW |
423 | } |
424 | ||
425 | static void | |
426 | do_pragma_implementation (pfile) | |
427 | cpp_reader *pfile; | |
428 | { | |
429 | /* Be quiet about `#pragma implementation' for a file only if it hasn't | |
430 | been included yet. */ | |
93c80368 | 431 | cpp_token token; |
58fea6af | 432 | |
93c80368 NB |
433 | cpp_start_lookahead (pfile); |
434 | cpp_get_token (pfile, &token); | |
435 | cpp_stop_lookahead (pfile, 0); | |
58fea6af | 436 | |
93c80368 NB |
437 | /* If it's not a string, pass it through and let the front end complain. */ |
438 | if (token.type == CPP_STRING) | |
439 | { | |
440 | /* Make a NUL-terminated copy of the string. */ | |
441 | char *filename = alloca (token.val.str.len + 1); | |
442 | memcpy (filename, token.val.str.text, token.val.str.len); | |
443 | filename[token.val.str.len] = '\0'; | |
444 | if (cpp_included (pfile, filename)) | |
58fea6af | 445 | cpp_warning (pfile, |
93c80368 NB |
446 | "#pragma GCC implementation for \"%s\" appears after file is included", |
447 | filename); | |
448 | } | |
449 | else if (token.type != CPP_EOF) | |
450 | { | |
451 | cpp_error (pfile, "malformed #pragma GCC implementation"); | |
452 | return; | |
58fea6af ZW |
453 | } |
454 | ||
93c80368 NB |
455 | /* Output? This is nasty, but we don't have [GCC] implementation in |
456 | the buffer. */ | |
d8090680 | 457 | if (pfile->cb.def_pragma) |
93c80368 NB |
458 | { |
459 | maybe_print_line (cpp_get_line (pfile)->output_line); | |
460 | fputs ("#pragma GCC implementation ", print.outf); | |
461 | cpp_output_line (pfile, print.outf); | |
462 | print.lineno++; | |
463 | } | |
58fea6af ZW |
464 | } |
465 | ||
466 | /* Dump out the hash table. */ | |
467 | static int | |
926c5678 | 468 | dump_macro (pfile, node, v) |
58fea6af | 469 | cpp_reader *pfile; |
93c80368 | 470 | cpp_hashnode *node; |
926c5678 | 471 | void *v ATTRIBUTE_UNUSED; |
58fea6af | 472 | { |
93c80368 | 473 | if (node->type == NT_MACRO && !(node->flags & NODE_BUILTIN)) |
58fea6af | 474 | { |
93c80368 NB |
475 | fprintf (print.outf, "#define %s", node->name); |
476 | fputs ((const char *) cpp_macro_definition (pfile, node), print.outf); | |
477 | putc ('\n', print.outf); | |
478 | print.lineno++; | |
58fea6af ZW |
479 | } |
480 | ||
481 | return 1; | |
482 | } |