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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 ZW |
40 | int main PARAMS ((int, char **)); |
41 | ||
93c80368 NB |
42 | /* General output routines. */ |
43 | static void scan_buffer PARAMS ((cpp_reader *)); | |
44 | static int printer_init PARAMS ((cpp_reader *)); | |
926c5678 | 45 | static int dump_macro PARAMS ((cpp_reader *, cpp_hashnode *, void *)); |
93c80368 NB |
46 | |
47 | static void print_line PARAMS ((const char *)); | |
48 | static void maybe_print_line PARAMS ((unsigned int)); | |
49 | static void move_printer PARAMS ((cpp_reader *, unsigned int, const char *)); | |
50 | ||
58fea6af ZW |
51 | /* Callback routines for the parser. Most of these are active only |
52 | in specific modes. */ | |
53 | static void cb_define PARAMS ((cpp_reader *, cpp_hashnode *)); | |
54 | static void cb_undef PARAMS ((cpp_reader *, cpp_hashnode *)); | |
55 | static void cb_include PARAMS ((cpp_reader *, const unsigned char *, | |
93c80368 NB |
56 | const cpp_token *)); |
57 | static void cb_ident PARAMS ((cpp_reader *, const cpp_string *)); | |
58fea6af ZW |
58 | static void cb_enter_file PARAMS ((cpp_reader *)); |
59 | static void cb_leave_file PARAMS ((cpp_reader *)); | |
9ec7291f | 60 | static void cb_rename_file PARAMS ((cpp_reader *)); |
58fea6af | 61 | static void cb_def_pragma PARAMS ((cpp_reader *)); |
58fea6af | 62 | static void do_pragma_implementation PARAMS ((cpp_reader *)); |
93c80368 NB |
63 | |
64 | const char *progname; | |
926c5678 GK |
65 | static cpp_reader parse_in; |
66 | static struct printer print; | |
58fea6af | 67 | |
7f2935c7 PB |
68 | int |
69 | main (argc, argv) | |
70 | int argc; | |
71 | char **argv; | |
72 | { | |
73 | char *p; | |
ae79697b | 74 | cpp_reader *pfile = &parse_in; |
0f41302f | 75 | int argi = 1; /* Next argument to handle. */ |
7f2935c7 PB |
76 | |
77 | p = argv[0] + strlen (argv[0]); | |
38b8de2f | 78 | while (p != argv[0] && ! IS_DIR_SEPARATOR (p[-1])) --p; |
7f2935c7 PB |
79 | progname = p; |
80 | ||
f95e46b9 ZW |
81 | xmalloc_set_program_name (progname); |
82 | ||
d9b53430 | 83 | #ifdef HAVE_LC_MESSAGES |
ab87f8c8 | 84 | setlocale (LC_MESSAGES, ""); |
d9b53430 | 85 | #endif |
735396d9 KG |
86 | (void) bindtextdomain (PACKAGE, localedir); |
87 | (void) textdomain (PACKAGE); | |
ab87f8c8 | 88 | |
c154ba66 | 89 | cpp_init (); |
ae79697b | 90 | cpp_reader_init (pfile); |
7f2935c7 | 91 | |
ae79697b ZW |
92 | argi += cpp_handle_options (pfile, argc - argi , argv + argi); |
93 | if (argi < argc && ! CPP_FATAL_ERRORS (pfile)) | |
94 | cpp_fatal (pfile, "Invalid option %s", argv[argi]); | |
95 | if (CPP_FATAL_ERRORS (pfile)) | |
bcc5cac9 | 96 | return (FATAL_EXIT_CODE); |
7f2935c7 | 97 | |
f2d5f0cc ZW |
98 | /* Open the output now. We must do so even if no_output is on, |
99 | because there may be other output than from the actual | |
100 | preprocessing (e.g. from -dM). */ | |
93c80368 | 101 | if (printer_init (pfile)) |
bcc5cac9 | 102 | return (FATAL_EXIT_CODE); |
58fea6af ZW |
103 | |
104 | /* Set callbacks. */ | |
d8090680 | 105 | if (! CPP_OPTION (pfile, no_output)) |
58fea6af | 106 | { |
d8090680 NB |
107 | pfile->cb.ident = cb_ident; |
108 | pfile->cb.def_pragma = cb_def_pragma; | |
109 | if (! CPP_OPTION (pfile, no_line_commands)) | |
110 | { | |
111 | pfile->cb.enter_file = cb_enter_file; | |
112 | pfile->cb.leave_file = cb_leave_file; | |
113 | pfile->cb.rename_file = cb_rename_file; | |
114 | } | |
58fea6af | 115 | } |
d8090680 | 116 | |
58fea6af ZW |
117 | if (CPP_OPTION (pfile, dump_includes)) |
118 | pfile->cb.include = cb_include; | |
d8090680 | 119 | |
58fea6af ZW |
120 | if (CPP_OPTION (pfile, debug_output) |
121 | || CPP_OPTION (pfile, dump_macros) == dump_names | |
122 | || CPP_OPTION (pfile, dump_macros) == dump_definitions) | |
123 | { | |
124 | pfile->cb.define = cb_define; | |
125 | pfile->cb.undef = cb_undef; | |
126 | pfile->cb.poison = cb_def_pragma; | |
127 | } | |
58fea6af ZW |
128 | |
129 | /* Register one #pragma which needs special handling. */ | |
130 | cpp_register_pragma(pfile, 0, "implementation", do_pragma_implementation); | |
131 | cpp_register_pragma(pfile, "GCC", "implementation", do_pragma_implementation); | |
7f2935c7 | 132 | |
93c80368 | 133 | if (! cpp_start_read (pfile, CPP_OPTION (pfile, in_fname))) |
f2d5f0cc ZW |
134 | return (FATAL_EXIT_CODE); |
135 | ||
93c80368 NB |
136 | if (CPP_BUFFER (pfile)) |
137 | { | |
138 | if (CPP_OPTION (pfile, no_output)) | |
139 | cpp_scan_buffer_nooutput (pfile); | |
140 | else | |
141 | scan_buffer (pfile); | |
142 | } | |
7f2935c7 | 143 | |
93c80368 | 144 | /* -dM command line option. */ |
58fea6af | 145 | if (CPP_OPTION (pfile, dump_macros) == dump_only) |
926c5678 | 146 | cpp_forall_identifiers (pfile, dump_macro, NULL); |
93c80368 NB |
147 | |
148 | cpp_finish (pfile); | |
ae79697b | 149 | cpp_cleanup (pfile); |
a9ae4483 | 150 | |
93c80368 NB |
151 | /* Flush any pending output. */ |
152 | if (print.printed) | |
153 | putc ('\n', print.outf); | |
154 | if (ferror (print.outf) || fclose (print.outf)) | |
155 | cpp_notice_from_errno (pfile, CPP_OPTION (pfile, out_fname)); | |
156 | ||
7f2935c7 | 157 | if (parse_in.errors) |
bcc5cac9 KG |
158 | return (FATAL_EXIT_CODE); |
159 | return (SUCCESS_EXIT_CODE); | |
7f2935c7 | 160 | } |
58fea6af | 161 | |
93c80368 NB |
162 | /* Writes out the preprocessed file. Alternates between two tokens, |
163 | so that we can avoid accidental token pasting. */ | |
164 | static void | |
165 | scan_buffer (pfile) | |
166 | cpp_reader *pfile; | |
167 | { | |
168 | unsigned int index, line; | |
169 | cpp_token tokens[2], *token; | |
58fea6af | 170 | |
93c80368 NB |
171 | do |
172 | { | |
173 | for (index = 0;; index = 1 - index) | |
174 | { | |
175 | token = &tokens[index]; | |
176 | cpp_get_token (pfile, token); | |
177 | ||
178 | if (token->type == CPP_EOF) | |
179 | break; | |
180 | ||
181 | line = cpp_get_line (pfile)->output_line; | |
182 | if (print.lineno != line) | |
183 | { | |
184 | unsigned int col = cpp_get_line (pfile)->col; | |
185 | ||
186 | /* Supply enough whitespace to put this token in its original | |
187 | column. Don't bother trying to reconstruct tabs; we can't | |
188 | get it right in general, and nothing ought to care. (Yes, | |
189 | some things do care; the fault lies with them.) */ | |
190 | maybe_print_line (line); | |
191 | if (col > 1) | |
192 | { | |
193 | if (token->flags & PREV_WHITE) | |
194 | col--; | |
195 | while (--col) | |
196 | putc (' ', print.outf); | |
197 | } | |
198 | } | |
3a59c77c RH |
199 | else if (print.printed |
200 | && ! (token->flags & PREV_WHITE) | |
201 | && ! CPP_OPTION (pfile, lang_asm) | |
93c80368 NB |
202 | && cpp_avoid_paste (pfile, &tokens[1 - index], token)) |
203 | token->flags |= PREV_WHITE; | |
204 | ||
205 | cpp_output_token (token, print.outf); | |
206 | print.printed = 1; | |
207 | } | |
208 | } | |
209 | while (cpp_pop_buffer (pfile) != 0); | |
210 | } | |
211 | ||
212 | /* Initialize a cpp_printer structure. As a side effect, open the | |
213 | output file. */ | |
214 | static int | |
215 | printer_init (pfile) | |
216 | cpp_reader *pfile; | |
217 | { | |
218 | print.last_fname = 0; | |
219 | print.lineno = 0; | |
220 | print.printed = 0; | |
221 | print.no_line_dirs = CPP_OPTION (pfile, no_line_commands); | |
222 | ||
223 | if (CPP_OPTION (pfile, out_fname) == NULL) | |
224 | CPP_OPTION (pfile, out_fname) = ""; | |
225 | ||
226 | if (CPP_OPTION (pfile, out_fname)[0] == '\0') | |
227 | print.outf = stdout; | |
228 | else | |
229 | { | |
230 | print.outf = fopen (CPP_OPTION (pfile, out_fname), "w"); | |
231 | if (! print.outf) | |
232 | { | |
233 | cpp_notice_from_errno (pfile, CPP_OPTION (pfile, out_fname)); | |
234 | return 1; | |
235 | } | |
236 | } | |
237 | return 0; | |
238 | } | |
239 | ||
240 | /* Newline-terminate any output line currently in progress. If | |
241 | appropriate, write the current line number to the output, or pad | |
242 | with newlines so the output line matches the current line. */ | |
58fea6af | 243 | static void |
93c80368 NB |
244 | maybe_print_line (line) |
245 | unsigned int line; | |
246 | { | |
247 | /* End the previous line of text (probably only needed until we get | |
248 | multi-line tokens fixed). */ | |
249 | if (print.printed) | |
250 | { | |
251 | putc ('\n', print.outf); | |
252 | print.lineno++; | |
253 | print.printed = 0; | |
254 | } | |
255 | ||
256 | if (print.no_line_dirs) | |
257 | return; | |
258 | ||
259 | if (line >= print.lineno && line < print.lineno + 8) | |
260 | { | |
261 | while (line > print.lineno) | |
262 | { | |
263 | putc ('\n', print.outf); | |
264 | print.lineno++; | |
265 | } | |
266 | } | |
267 | else | |
268 | { | |
269 | print.lineno = line; | |
270 | print_line (""); | |
271 | } | |
272 | } | |
273 | ||
274 | static void | |
275 | print_line (special_flags) | |
276 | const char *special_flags; | |
277 | { | |
278 | /* End any previous line of text. */ | |
279 | if (print.printed) | |
280 | putc ('\n', print.outf); | |
281 | print.printed = 0; | |
282 | ||
283 | fprintf (print.outf, "# %u \"%s\"%s%s\n", | |
284 | print.lineno, print.last_fname, special_flags, print.syshdr_flags); | |
285 | } | |
286 | ||
287 | static void | |
288 | move_printer (pfile, line, special_flags) | |
58fea6af | 289 | cpp_reader *pfile; |
93c80368 NB |
290 | unsigned int line; |
291 | const char *special_flags; | |
292 | { | |
293 | print.lineno = line; | |
294 | print.last_fname = pfile->buffer->nominal_fname; | |
295 | print.syshdr_flags = cpp_syshdr_flags (pfile, pfile->buffer); | |
296 | print_line (special_flags); | |
297 | } | |
298 | ||
299 | /* Callbacks */ | |
300 | ||
301 | static void | |
302 | cb_ident (pfile, str) | |
303 | cpp_reader *pfile ATTRIBUTE_UNUSED; | |
304 | const cpp_string * str; | |
58fea6af | 305 | { |
93c80368 NB |
306 | maybe_print_line (cpp_get_line (pfile)->output_line); |
307 | fprintf (print.outf, "#ident \"%.*s\"\n", (int) str->len, str->text); | |
308 | print.lineno++; | |
58fea6af ZW |
309 | } |
310 | ||
311 | static void | |
93c80368 | 312 | cb_define (pfile, node) |
58fea6af | 313 | cpp_reader *pfile; |
93c80368 | 314 | cpp_hashnode *node; |
58fea6af | 315 | { |
5ef865d5 ZW |
316 | if (pfile->done_initializing) |
317 | { | |
93c80368 NB |
318 | maybe_print_line (cpp_get_line (pfile)->output_line); |
319 | fprintf (print.outf, "#define %s", node->name); | |
320 | ||
321 | /* -dD or -g3 command line options. */ | |
5ef865d5 ZW |
322 | if (CPP_OPTION (pfile, debug_output) |
323 | || CPP_OPTION (pfile, dump_macros) == dump_definitions) | |
93c80368 NB |
324 | fputs ((const char *) cpp_macro_definition (pfile, node), print.outf); |
325 | ||
326 | putc ('\n', print.outf); | |
327 | print.lineno++; | |
5ef865d5 | 328 | } |
58fea6af ZW |
329 | } |
330 | ||
331 | static void | |
93c80368 | 332 | cb_undef (pfile, node) |
58fea6af | 333 | cpp_reader *pfile; |
93c80368 | 334 | cpp_hashnode *node; |
58fea6af | 335 | { |
5ef865d5 | 336 | if (pfile->done_initializing) |
3cb553b4 | 337 | { |
93c80368 NB |
338 | maybe_print_line (cpp_get_line (pfile)->output_line); |
339 | fprintf (print.outf, "#undef %s\n", node->name); | |
340 | print.lineno++; | |
3cb553b4 | 341 | } |
58fea6af ZW |
342 | } |
343 | ||
344 | static void | |
93c80368 NB |
345 | cb_include (pfile, dir, header) |
346 | cpp_reader *pfile ATTRIBUTE_UNUSED; | |
58fea6af | 347 | const unsigned char *dir; |
93c80368 | 348 | const cpp_token *header; |
58fea6af | 349 | { |
93c80368 NB |
350 | maybe_print_line (cpp_get_line (pfile)->output_line); |
351 | fprintf (print.outf, "#%s %s\n", dir, cpp_token_as_text (pfile, header)); | |
352 | print.lineno++; | |
58fea6af ZW |
353 | } |
354 | ||
355 | static void | |
356 | cb_enter_file (pfile) | |
357 | cpp_reader *pfile; | |
358 | { | |
93c80368 NB |
359 | /* Bring current file to correct line (except main file). FIXME: we |
360 | may be using the same buffer via a # NUMBER "file" 1 directive. */ | |
361 | if (pfile->done_initializing && pfile->buffer->prev) | |
362 | maybe_print_line (pfile->buffer->prev->lineno); | |
58fea6af | 363 | |
93c80368 | 364 | move_printer (pfile, 1, pfile->done_initializing ? " 1": ""); |
58fea6af ZW |
365 | } |
366 | ||
367 | static void | |
368 | cb_leave_file (pfile) | |
369 | cpp_reader *pfile; | |
370 | { | |
93c80368 | 371 | move_printer (pfile, pfile->buffer->lineno + 1, " 2"); |
58fea6af ZW |
372 | } |
373 | ||
9ec7291f ZW |
374 | static void |
375 | cb_rename_file (pfile) | |
376 | cpp_reader *pfile; | |
377 | { | |
93c80368 | 378 | move_printer (pfile, pfile->buffer->lineno + 1, ""); |
9ec7291f ZW |
379 | } |
380 | ||
58fea6af ZW |
381 | static void |
382 | cb_def_pragma (pfile) | |
383 | cpp_reader *pfile; | |
384 | { | |
93c80368 NB |
385 | maybe_print_line (cpp_get_line (pfile)->output_line); |
386 | fputs ("#pragma ", print.outf); | |
387 | cpp_output_line (pfile, print.outf); | |
388 | print.lineno++; | |
58fea6af ZW |
389 | } |
390 | ||
391 | static void | |
392 | do_pragma_implementation (pfile) | |
393 | cpp_reader *pfile; | |
394 | { | |
395 | /* Be quiet about `#pragma implementation' for a file only if it hasn't | |
396 | been included yet. */ | |
93c80368 | 397 | cpp_token token; |
58fea6af | 398 | |
93c80368 NB |
399 | cpp_start_lookahead (pfile); |
400 | cpp_get_token (pfile, &token); | |
401 | cpp_stop_lookahead (pfile, 0); | |
58fea6af | 402 | |
93c80368 NB |
403 | /* If it's not a string, pass it through and let the front end complain. */ |
404 | if (token.type == CPP_STRING) | |
405 | { | |
406 | /* Make a NUL-terminated copy of the string. */ | |
407 | char *filename = alloca (token.val.str.len + 1); | |
408 | memcpy (filename, token.val.str.text, token.val.str.len); | |
409 | filename[token.val.str.len] = '\0'; | |
410 | if (cpp_included (pfile, filename)) | |
58fea6af | 411 | cpp_warning (pfile, |
93c80368 NB |
412 | "#pragma GCC implementation for \"%s\" appears after file is included", |
413 | filename); | |
414 | } | |
415 | else if (token.type != CPP_EOF) | |
416 | { | |
417 | cpp_error (pfile, "malformed #pragma GCC implementation"); | |
418 | return; | |
58fea6af ZW |
419 | } |
420 | ||
93c80368 NB |
421 | /* Output? This is nasty, but we don't have [GCC] implementation in |
422 | the buffer. */ | |
d8090680 | 423 | if (pfile->cb.def_pragma) |
93c80368 NB |
424 | { |
425 | maybe_print_line (cpp_get_line (pfile)->output_line); | |
426 | fputs ("#pragma GCC implementation ", print.outf); | |
427 | cpp_output_line (pfile, print.outf); | |
428 | print.lineno++; | |
429 | } | |
58fea6af ZW |
430 | } |
431 | ||
432 | /* Dump out the hash table. */ | |
433 | static int | |
926c5678 | 434 | dump_macro (pfile, node, v) |
58fea6af | 435 | cpp_reader *pfile; |
93c80368 | 436 | cpp_hashnode *node; |
926c5678 | 437 | void *v ATTRIBUTE_UNUSED; |
58fea6af | 438 | { |
93c80368 | 439 | if (node->type == NT_MACRO && !(node->flags & NODE_BUILTIN)) |
58fea6af | 440 | { |
93c80368 NB |
441 | fprintf (print.outf, "#define %s", node->name); |
442 | fputs ((const char *) cpp_macro_definition (pfile, node), print.outf); | |
443 | putc ('\n', print.outf); | |
444 | print.lineno++; | |
58fea6af ZW |
445 | } |
446 | ||
447 | return 1; | |
448 | } |