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comparison lib-src/make-msgfile.lex @ 70:131b0175ea99 r20-0b30

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date Mon, 13 Aug 2007 09:02:59 +0200
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69:804d1389bcd6 70:131b0175ea99
1 %{
2
3 /* This is a Lex file. */
4
5 /* Localizable-message snarfing.
6 Copyright (C) 1994, 1995 Amdahl Corporation.
7
8 This file is part of XEmacs.
9
10 XEmacs is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2, or (at your option)
13 any later version.
14
15 XEmacs is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License
21 along with XEmacs; see the file COPYING. If not, write to
22 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 Boston, MA 02111-1307, USA. */
24
25 /* Written by Ben Wing, November 1994. Some code based on earlier
26 make-msgfile.c. */
27
28 /* Note: there is still much work to be done on this.
29
30 1) Definition of Arg below won't handle a generalized argument
31 as might appear in a function call. This is fine for DEFUN
32 and friends, because only simple arguments appear there; but
33 it might run into problems if Arg is used for other sorts
34 of functions.
35 2) snarf() should be modified so that it doesn't output null
36 strings and non-textual strings (see the comment at the top
37 of make-msgfile.c).
38 3) parsing of (insert) should snarf all of the arguments.
39 4) need to add set-keymap-prompt and deal with gettext of that.
40 5) parsing of arguments should snarf all strings anywhere within
41 the arguments, rather than just looking for a string as the
42 argument. This allows if statements as arguments to get parsed.
43 6) begin_paren_counting() et al. should handle recursive entry.
44 7) handle set-window-buffer and other such functions that take
45 a buffer as the other-than-first argument.
46 8) there is a fair amount of work to be done on the C code.
47 Look through the code for #### comments associated with
48 '#ifdef I18N3' or with an I18N3 nearby.
49 9) Deal with `get-buffer-process' et al.
50 10) Many of the changes in the Lisp code marked
51 'rewritten for I18N3 snarfing' should be undone once (5) is
52 implemented.
53 11) Go through the Lisp code in prim and make sure that all
54 strings are gettexted as necessary. This may reveal more
55 things to implement.
56 12) Do the equivalent of (8) for the Lisp code.
57 13) Deal with parsing of menu specifications.
58
59 --ben
60
61 */
62
63 /* Long comment from jwz:
64
65 (much of this comment is outdated, and a lot of it is actually
66 implemented)
67
68
69 PROPOSAL FOR HOW THIS ALL OUGHT TO WORK
70 this isn't implemented yet, but this is the plan-in-progress
71
72
73 In general, it's accepted that the best way to internationalize is for all
74 messages to be referred to by a symbolic name (or number) and come out of a
75 table or tables, which are easy to change.
76
77 However, with Emacs, we've got the task of internationalizing a huge body
78 of existing code, which already contains messages internally.
79
80 For the C code we've got two options:
81
82 - Use a Sun-like gettext() form, which takes an "english" string which
83 appears literally in the source, and uses that as a hash key to find
84 a translated string;
85 - Rip all of the strings out and put them in a table.
86
87 In this case, it's desirable to make as few changes as possible to the C
88 code, to make it easier to merge the code with the FSF version of emacs
89 which won't ever have these changes made to it. So we should go with the
90 former option.
91
92 The way it has been done (between 19.8 and 19.9) was to use gettext(), but
93 *also* to make massive changes to the source code. The goal now is to use
94 gettext() at run-time and yet not require a textual change to every line
95 in the C code which contains a string constant. A possible way to do this
96 is described below.
97
98 (gettext() can be implemented in terms of catgets() for non-Sun systems, so
99 that in itself isn't a problem.)
100
101 For the Lisp code, we've got basically the same options: put everything in
102 a table, or translate things implicitly.
103
104 Another kink that lisp code introduces is that there are thousands of third-
105 party packages, so changing the source for all of those is simply not an
106 option.
107
108 Is it a goal that if some third party package displays a message which is
109 one we know how to translate, then we translate it? I think this is a
110 worthy goal. It remains to be seen how well it will work in practice.
111
112 So, we should endeavor to minimize the impact on the lisp code. Certain
113 primitive lisp routines (the stuff in lisp/prim/, and especially in
114 cmdloop.el and minibuf.el) may need to be changed to know about translation,
115 but that's an ideologically clean thing to do because those are considered
116 a part of the emacs substrate.
117
118 However, if we find ourselves wanting to make changes to, say, RMAIL, then
119 something has gone wrong. (Except to do things like remove assumptions
120 about the order of words within a sentence, or how pluralization works.)
121
122 There are two parts to the task of displaying translated strings to the
123 user: the first is to extract the strings which need to be translated from
124 the sources; and the second is to make some call which will translate those
125 strings before they are presented to the user.
126
127 The old way was to use the same form to do both, that is, GETTEXT() was both
128 the tag that we searched for to build a catalog, and was the form which did
129 the translation. The new plan is to separate these two things more: the
130 tags that we search for to build the catalog will be stuff that was in there
131 already, and the translation will get done in some more centralized, lower
132 level place.
133
134 This program (make-msgfile.c) addresses the first part, extracting the
135 strings.
136
137 For the emacs C code, we need to recognise the following patterns:
138
139 message ("string" ... )
140 error ("string")
141 report_file_error ("string" ... )
142 signal_simple_error ("string" ... )
143 signal_simple_error_2 ("string" ... )
144
145 build_translated_string ("string")
146 #### add this and use it instead of build_string() in some places.
147
148 yes_or_no_p ("string" ... )
149 #### add this instead of funcalling Qyes_or_no_p directly.
150
151 barf_or_query_if_file_exists #### restructure this
152 check all callers of Fsignal #### restructure these
153 signal_error (Qerror ... ) #### change all of these to error()
154
155 And we also parse out the `interactive' prompts from DEFUN() forms.
156
157 #### When we've got a string which is a candidate for translation, we
158 should ignore it if it contains only format directives, that is, if
159 there are no alphabetic characters in it that are not a part of a `%'
160 directive. (Careful not to translate either "%s%s" or "%s: ".)
161
162 For the emacs Lisp code, we need to recognise the following patterns:
163
164 (message "string" ... )
165 (error "string" ... )
166 (format "string" ... )
167 (read-from-minibuffer "string" ... )
168 (read-shell-command "string" ... )
169 (y-or-n-p "string" ... )
170 (yes-or-no-p "string" ... )
171 (read-file-name "string" ... )
172 (temp-minibuffer-message "string")
173 (query-replace-read-args "string" ... )
174
175 I expect there will be a lot like the above; basically, any function which
176 is a commonly used wrapper around an eventual call to `message' or
177 `read-from-minibuffer' needs to be recognised by this program.
178
179
180 (dgettext "domain-name" "string") #### do we still need this?
181
182 things that should probably be restructured:
183 `princ' in cmdloop.el
184 `insert' in debug.el
185 face-interactive
186 help.el, syntax.el all messed up
187
188 BPW: (format) is a tricky case. If I use format to create a string
189 that I then send to a file, I probably don't want the string translated.
190 On the other hand, If the string gets used as an argument to (y-or-n-p)
191 or some such function, I do want it translated, and it needs to be
192 translated before the %s and such are replaced. The proper solution
193 here is for (format) and other functions that call gettext but don't
194 immediately output the string to the user to add the translated (and
195 formatted) string as a string property of the object, and have
196 functions that output potentially translated strings look for a
197 "translated string" property. Of course, this will fail if someone
198 does something like
199
200 (y-or-n-p (concat (if you-p "Do you " "Does he ")
201 (format "want to delete %s? " filename))))
202
203 But you shouldn't be doing things like this anyway.
204
205 BPW: Also, to avoid excessive translating, strings should be marked
206 as translated once they get translated, and further calls to gettext
207 don't do any more translating. Otherwise, a call like
208
209 (y-or-n-p (format "Delete %s? " filename))
210
211 would cause translation on both the pre-formatted and post-formatted
212 strings, which could lead to weird results in some cases (y-or-n-p
213 has to translate its argument because someone could pass a string to
214 it directly). Note that the "translating too much" solution outlined
215 below could be implemented by just marking all strings that don't
216 come from a .el or .elc file as already translated.
217
218 Menu descriptors: one way to extract the strings in menu labels would be
219 to teach this program about "^(defvar .*menu\n" forms; that's probably
220 kind of hard, though, so perhaps a better approach would be to make this
221 program recognise lines of the form
222
223 "string" ... ;###translate
224
225 where the magic token ";###translate" on a line means that the string
226 constant on this line should go into the message catalog. This is analagous
227 to the magic ";###autoload" comments, and to the magic comments used in the
228 EPSF structuring conventions.
229
230 -----
231 So this program manages to build up a catalog of strings to be translated.
232 To address the second part of the problem, of actually looking up the
233 translations, there are hooks in a small number of low level places in
234 emacs.
235
236 Assume the existence of a C function gettext(str) which returns the
237 translation of `str' if there is one, otherwise returns `str'.
238
239 - message() takes a char* as its argument, and always filters it through
240 gettext() before displaying it.
241
242 - errors are printed by running the lisp function `display-error' which
243 doesn't call `message' directly (it princ's to streams), so it must be
244 carefully coded to translate its arguments. This is only a few lines
245 of code.
246
247 - Fread_minibuffer_internal() is the lowest level interface to all minibuf
248 interactions, so it is responsible for translating the value that will go
249 into Vminibuf_prompt.
250
251 - Fpopup_menu filters the menu titles through gettext().
252
253 The above take care of 99% of all messages the user ever sees.
254
255 - The lisp function temp-minibuffer-message translates its arg.
256
257 - query-replace-read-args is funny; it does
258 (setq from (read-from-minibuffer (format "%s: " string) ... ))
259 (setq to (read-from-minibuffer (format "%s %s with: " string from) ... ))
260
261 What should we do about this? We could hack query-replace-read-args to
262 translate its args, but might this be a more general problem? I don't
263 think we ought to translate all calls to format. We could just change
264 the calling sequence, since this is odd in that the first %s wants to be
265 translated but the second doesn't.
266
267
268 Solving the "translating too much" problem:
269 The concern has been raised that in this situation:
270 - "Help" is a string for which we know a translation;
271 - someone visits a file called Help, and someone does something
272 contrived like (error buffer-file-name)
273 then we would display the translation of Help, which would not be correct.
274 We can solve this by adding a bit to Lisp_String objects which identifies
275 them as having been read as literal constants from a .el or .elc file (as
276 opposed to having been constructed at run time as it would in the above
277 case.) To solve this:
278
279 - Fmessage() takes a lisp string as its first argument.
280 If that string is a constant, that is, was read from a source file
281 as a literal, then it calls message() with it, which translates.
282 Otherwise, it calls message_no_translate(), which does not translate.
283
284 - Ferror() (actually, Fsignal() when condition is Qerror) works similarly.
285 */
286
287 /* Some notes:
288
289 -- {Arg} below could get confused by commas inside of quotes.
290 -- {LispToken} below can match some things that are not tokens (e.g.
291 numbers) but for all practical purposes it should be fine.
292 */
293
294 #include <stdio.h>
295
296 int snarf_return_state;
297
298 %}
299
300 %p 6000
301 %e 2000
302 %n 1000
303 %a 4000
304 %s C_QUOTE C_COMMENT LQUO LCOM
305 %s CSNARF LSNARF
306 %s DO_C DO_LISP DEFUN
307 %s DEFUN2 DEFUN3 LDEF
308
309 W [ \t\n]
310 Any (.|"\n")
311 Q "\""
312 NQ [^"]
313 NT [^A-Za-z_0-9]
314 LP "("
315 RP ")"
316 BS "\\"
317 Esc ({BS}{Any})
318 Wh ({W}*)
319 LCom (";"({Esc}|.)*)
320 LWh (({W}|{Lcom})*)
321 Open ({Wh}{LP})
322 OpWQ ({Open}{Wh}{Q})
323 String ({Q}({Esc}|{NQ})*{Q})
324 Arg ([^,]*",")
325 StringArg ({Wh}{String}{Wh}",")
326 OpenString ({Open}{StringArg})
327 LispToken (({Esc}|[-A-Za-z0-9!@$%^&*_=+|{}`~,<.>/?])+)
328 %%
329
330 <DO_C>{NT}"GETTEXT"{OpWQ} { snarf (); }
331 <DO_C>{NT}"DEFER_GETTEXT"{OpWQ} { snarf (); }
332 <DO_C>{NT}"build_translated_string"{OpWQ} { snarf (); }
333 <DO_C>{NT}"insert_string"{OpWQ} { snarf (); }
334 <DO_C>{NT}"message"{OpWQ} { snarf (); }
335 <DO_C>{NT}"warn_when_safe"{OpWQ} { snarf (); }
336 <DO_C>{NT}"error"{OpWQ} { snarf (); }
337 <DO_C>{NT}"continuable_error"{OpWQ} { snarf (); }
338 <DO_C>{NT}"signal_simple_error"{OpWQ} { snarf (); }
339 <DO_C>{NT}"signal_simple_error_2"{OpWQ} { snarf (); }
340 <DO_C>{NT}"signal_simple_continuable_error"{OpWQ} { snarf (); }
341 <DO_C>{NT}"signal_simple_continuable_error_2"{OpWQ} { snarf (); }
342 <DO_C>{NT}"report_file_error"{OpWQ} { snarf (); }
343 <DO_C>{NT}"signal_file_error"{OpWQ} { snarf (); }
344 <DO_C>{NT}"signal_double_file_error"{OpWQ} { snarf (); }
345 <DO_C>{NT}"signal_double_file_error_2"{OpWQ} { snarf (); }
346 <DO_C>{NT}"syntax_error"{OpWQ} { snarf (); }
347 <DO_C>{NT}"continuable_syntax_error"{OpWQ} { snarf (); }
348 <DO_C>{NT}"CTB_ERROR"{OpWQ} { snarf (); }
349 <DO_C>{NT}"fatal"{OpWQ} { snarf (); }
350 <DO_C>{NT}"stdout_out"{OpWQ} { snarf (); }
351 <DO_C>{NT}"stderr_out"{OpWQ} { snarf (); }
352 <DO_C>{NT}"with_output_to_temp_buffer"{OpWQ} { snarf (); }
353
354 <DO_C>{NT}"DEFVAR_BOOL"{OpenString}{Arg}{Wh}{Q} { snarf (); }
355 <DO_C>{NT}"DEFVAR_LISP"{OpenString}{Arg}{Wh}{Q} { snarf (); }
356 <DO_C>{NT}"DEFVAR_SPECIFIER"{OpenString}{Arg}{Wh}{Q} { snarf (); }
357 <DO_C>{NT}"DEFVAR_INT"{OpenString}{Arg}{Wh}{Q} { snarf (); }
358 <DO_C>{NT}"DEFVAR_BUFFER_LOCAL"{OpenString}{Arg}{Wh}{Q} { snarf (); }
359 <DO_C>{NT}"DEFVAR_BUFFER_DEFAULTS"{OpenString}{Arg}{Wh}{Q} { snarf (); }
360 <DO_C>{NT}"deferror"{Open}{Arg}{StringArg}{Wh}{Q} { snarf (); }
361
362 <DO_C>{NT}"barf_or_query_if_file_exists"{Open}{Arg}{Wh}{Q} {
363 /* #### see comment above about use of Arg */
364 snarf ();
365 }
366
367 <DO_C>{NT}"DEFUN"{Open} { BEGIN DEFUN; }
368
369 <DO_C>"/*" {
370 /* This is hateful, but doc strings are sometimes put inside of comments
371 (to get around limits in cpp), so we can't ignore stuff inside of
372 comments. */
373 /* BEGIN C_COMMENT; */
374 }
375 <DO_C>{Q} { BEGIN C_QUOTE; }
376 <DO_C>{Any} { }
377
378 <DEFUN>{StringArg}{Arg}{Arg}{Arg}{Arg}{Wh} { BEGIN DEFUN2; }
379 <DEFUN>{Any} { bad_c_defun (); }
380
381 <DEFUN2>{Q} {
382 /* We found an interactive specification. */
383 snarf_return_state = DEFUN3;
384 snarf ();
385 }
386 <DEFUN2>[^,]* {
387 /* This function doesn't have an interactive specification.
388 Don't use {Arg} in the specification because DEFUN3 looks
389 for the comma. */
390 BEGIN DEFUN3;
391 }
392
393 <DEFUN3>{Wh}","{Wh}{Q} {
394 snarf_return_state = DO_C;
395 snarf ();
396 }
397 <DEFUN3>{Any} { bad_c_defun (); }
398
399 <C_QUOTE>{Esc} { }
400 <C_QUOTE>{Q} { BEGIN DO_C; }
401 <C_QUOTE>{Any} { }
402
403 <C_COMMENT>"*/" { BEGIN DO_C; }
404 <C_COMMENT>{Any} { }
405
406 <DO_LISP>{LP}{LWh}"gettext"{LWh}{Q} { inc_paren (); snarf (); }
407 <DO_LISP>{LP}{LWh}"purecopy"{LWh}{Q} { inc_paren (); snarf (); }
408 <DO_LISP>{LP}{LWh}"interactive"{LWh}{Q} { inc_paren (); snarf (); }
409 <DO_LISP>{LP}{LWh}"message"{LWh}{Q} { inc_paren (); snarf (); }
410 <DO_LISP>{LP}{LWh}"error"{LWh}{Q} { inc_paren (); snarf (); }
411 <DO_LISP>{LP}{LWh}"warn"{LWh}{Q} { inc_paren (); snarf (); }
412 <DO_LISP>{LP}{LWh}"format"{LWh}{Q} { inc_paren (); snarf (); }
413 <DO_LISP>{LP}{LWh}"substitute-command-keys"{LWh}{Q} { inc_paren (); snarf (); }
414 <DO_LISP>{LP}{LWh}"temp-minibuffer-message"{LWh}{Q} { inc_paren (); snarf (); }
415 <DO_LISP>{LP}{LWh}"momentary-string-display"{LWh}{Q} { inc_paren (); snarf (); }
416 <DO_LISP>{LP}{LWh}"princ"{LWh}{Q} { inc_paren (); snarf (); }
417 <DO_LISP>{LP}{LWh}"prin1"{LWh}{Q} { inc_paren (); snarf (); }
418 <DO_LISP>{LP}{LWh}"prin1-to-string"{LWh}{Q} { inc_paren (); snarf (); }
419 <DO_LISP>{LP}{LWh}"print"{LWh}{Q} { inc_paren (); snarf (); }
420 <DO_LISP>{LP}{LWh}"insert"{LWh}{Q} { inc_paren (); snarf (); }
421 <DO_LISP>{LP}{LWh}"insert-before-markers"{LWh}{Q} { inc_paren (); snarf (); }
422
423 <DO_LISP>{LP}{LWh}"get-buffer"{LWh}{Q} { inc_paren (); snarf (); }
424 <DO_LISP>{LP}{LWh}"get-buffer-create"{LWh}{Q} { inc_paren (); snarf (); }
425 <DO_LISP>{LP}{LWh}"generate-new-buffer-name"{LWh}{Q} { inc_paren (); snarf (); }
426 <DO_LISP>{LP}{LWh}"rename-buffer"{LWh}{Q} { inc_paren (); snarf (); }
427 <DO_LISP>{LP}{LWh}"set-buffer"{LWh}{Q} { inc_paren (); snarf (); }
428 <DO_LISP>{LP}{LWh}"switch-to-buffer"{LWh}{Q} { inc_paren (); snarf (); }
429 <DO_LISP>{LP}{LWh}"pop-to-buffer"{LWh}{Q} { inc_paren (); snarf (); }
430 <DO_LISP>{LP}{LWh}"with-output-to-temp-buffer"{LWh}{Q} { inc_paren (); snarf (); }
431 <DO_LISP>{LP}{LWh}"buffer-enable-undo"{LWh}{Q} { inc_paren (); snarf (); }
432 <DO_LISP>{LP}{LWh}"buffer-disable-undo"{LWh}{Q} { inc_paren (); snarf (); }
433 <DO_LISP>{LP}{LWh}"get-buffer-window"{LWh}{Q} { inc_paren (); snarf (); }
434 <DO_LISP>{LP}{LWh}"delete-windows-on"{LWh}{Q} { inc_paren (); snarf (); }
435 <DO_LISP>{LP}{LWh}"replace-buffer-in-windows"{LWh}{Q} { inc_paren (); snarf (); }
436 <DO_LISP>{LP}{LWh}"display-buffer"{LWh}{Q} { inc_paren (); snarf (); }
437 <DO_LISP>{LP}{LWh}"other-buffer"{LWh}{Q} { inc_paren (); snarf (); }
438
439 <DO_LISP>{LP}{LWh}"read-from-minibuffer"{LWh}{Q} { inc_paren (); snarf (); }
440 <DO_LISP>{LP}{LWh}"read-shell-command"{LWh}{Q} { inc_paren (); snarf (); }
441 <DO_LISP>{LP}{LWh}"read-file-name"{LWh}{Q} { inc_paren (); snarf (); }
442 <DO_LISP>{LP}{LWh}"read-buffer"{LWh}{Q} { inc_paren (); snarf (); }
443 <DO_LISP>{LP}{LWh}"read-variable"{LWh}{Q} { inc_paren (); snarf (); }
444 <DO_LISP>{LP}{LWh}"read-command"{LWh}{Q} { inc_paren (); snarf (); }
445 <DO_LISP>{LP}{LWh}"read-function"{LWh}{Q} { inc_paren (); snarf (); }
446 <DO_LISP>{LP}{LWh}"read-directory-name"{LWh}{Q} { inc_paren (); snarf (); }
447 <DO_LISP>{LP}{LWh}"read-string"{LWh}{Q} { inc_paren (); snarf (); }
448 <DO_LISP>{LP}{LWh}"read-number"{LWh}{Q} { inc_paren (); snarf (); }
449 <DO_LISP>{LP}{LWh}"read-minibuffer"{LWh}{Q} { inc_paren (); snarf (); }
450 <DO_LISP>{LP}{LWh}"read-quoted-char"{LWh}{Q} { inc_paren (); snarf (); }
451 <DO_LISP>{LP}{LWh}"read-face-name"{LWh}{Q} { inc_paren (); snarf (); }
452 <DO_LISP>{LP}{LWh}"read-itimer"{LWh}{Q} { inc_paren (); snarf (); }
453 <DO_LISP>{LP}{LWh}"completing-read"{LWh}{Q} { inc_paren (); snarf (); }
454 <DO_LISP>{LP}{LWh}"y-or-n-p"{LWh}{Q} { inc_paren (); snarf (); }
455 <DO_LISP>{LP}{LWh}"yes-or-no-p"{LWh}{Q} { inc_paren (); snarf (); }
456 <DO_LISP>{LP}{LWh}"query-replace-read-args"{LWh}{Q} { inc_paren (); snarf (); }
457 <DO_LISP>{LP}{LWh}"eval-minibuffer"{LWh}{Q} { inc_paren (); snarf (); }
458 <DO_LISP>{LP}{LWh}"edit-and-eval-command"{LWh}{Q} { inc_paren (); snarf (); }
459
460 <DO_LISP>{LP}{LWh}"defvar"{LWh}{LispToken}{LWh} {
461 inc_paren (); begin_paren_counting (LDEF);
462 }
463 <DO_LISP>{LP}{LWh}"defconst"{LWh}{LispToken}{LWh} {
464 inc_paren (); begin_paren_counting (LDEF);
465 }
466 <DO_LISP>{LP}{LWh}"defun"{LWh}{LispToken}{LWh} {
467 inc_paren (); begin_paren_counting (LDEF);
468 }
469 <DO_LISP>{LP}{LWh}"defmacro"{LWh}{LispToken}{LWh} {
470 inc_paren (); begin_paren_counting (LDEF);
471 }
472 <DO_LISP>{LP}{LWh}"defsubst"{LWh}{LispToken}{LWh} {
473 inc_paren (); begin_paren_counting (LDEF);
474 }
475
476 <DO_LISP>{Q} { BEGIN LQUO; }
477 <DO_LISP>";" { BEGIN LCOM; }
478 <DO_LISP>{LP} { inc_paren (); }
479 <DO_LISP>{RP} { dec_paren (); }
480 <DO_LISP>{Esc} { }
481 <DO_LISP>{W} { lisp_whitespace (); }
482 <DO_LISP>{Any} { }
483
484 <LQUO>{Esc} { }
485 <LQUO>{Q} { BEGIN DO_LISP; }
486 <LQUO>{Any} { }
487
488 <LCOM>"\n" { BEGIN DO_LISP; }
489 <LCOM>{Any} { }
490
491 <LDEF>{LWh}{Q} { snarf (); }
492 <LDEF>{Any} { BEGIN DO_LISP; }
493
494 <CSNARF>{Esc} { ECHO; }
495 <CSNARF>{Q} { ECHO; fprintf (yyout, ")\n"); BEGIN snarf_return_state; }
496 <CSNARF>{Any} { ECHO; }
497
498 <LSNARF>{Esc} { ECHO; }
499 <LSNARF>"\n" { fprintf (yyout, "\\n\\\n"); }
500 <LSNARF>{Q} { ECHO; fprintf (yyout, ")\n"); BEGIN snarf_return_state; }
501 <LSNARF>{Any} { ECHO; }
502
503 %%
504
505 enum filetype { C_FILE, LISP_FILE, INVALID_FILE };
506 /* some brain-dead headers define this ... */
507 #undef FALSE
508 #undef TRUE
509 enum boolean { FALSE, TRUE };
510
511 void scan_file (char *filename);
512 void process_C_file (void);
513 void process_Lisp_file (void);
514
515 int in_c;
516 int in_paren_counting, paren_count;
517 int paren_return_state;
518
519 snarf ()
520 {
521 fprintf (yyout, "gettext(\"");
522 if (in_c)
523 BEGIN CSNARF;
524 else
525 BEGIN LSNARF;
526 }
527
528 bad_c_defun ()
529 {
530 fprintf (stderr, "Warning: Invalid DEFUN encountered in C, line %d.\n",
531 yylineno);
532 snarf_return_state = DO_C;
533 BEGIN DO_C;
534 /* REJECT; Sun's lex is broken! Use Flex! */
535 }
536
537 bad_lisp_def ()
538 {
539 fprintf (stderr,
540 "Warning: Invalid defmumble encountered in Lisp, line %d.\n",
541 yylineno);
542 snarf_return_state = DO_LISP;
543 BEGIN DO_LISP;
544 /* REJECT; Sun's lex is broken! Use Flex! */
545 }
546
547 inc_paren ()
548 {
549 if (in_paren_counting)
550 paren_count++;
551 }
552
553 dec_paren ()
554 {
555 if (in_paren_counting)
556 {
557 /* If we find a right paren without a matching left paren, it usually
558 just indicates a statement like
559
560 (defvar foo-mumble nil)
561
562 where 'nil' is the sexp we are skipping over, and there's no
563 doc string. */
564 if (paren_count > 0)
565 paren_count--;
566 else
567 unput (')');
568 if (paren_count == 0)
569 {
570 in_paren_counting = 0;
571 BEGIN paren_return_state;
572 }
573 }
574 }
575
576 /* #### begin_paren_counting () does not handle recursive entries */
577
578 begin_paren_counting (int return_state)
579 {
580 in_paren_counting = 1;
581 paren_count = 0;
582 paren_return_state = return_state;
583 }
584
585 lisp_whitespace ()
586 {
587 if (in_paren_counting && !paren_count)
588 {
589 /* We got to the end of a token and we're not in a parenthesized
590 expression, so we're at the end of an sexp. */
591 in_paren_counting = 0;
592 BEGIN paren_return_state;
593 }
594 }
595
596 yywrap ()
597 {
598 return 1;
599 }
600
601 main (int argc, char *argv[])
602 {
603 register int i;
604
605 yyout = stdout;
606
607 /* If first two args are -o FILE, output to FILE. */
608 i = 1;
609 if (argc > i + 1 && strcmp (argv[i], "-o") == 0) {
610 yyout = fopen (argv[++i], "w");
611 ++i;
612 }
613 /* ...Or if args are -a FILE, append to FILE. */
614 if (argc > i + 1 && strcmp (argv[i], "-a") == 0) {
615 yyout = fopen (argv[++i], "a");
616 ++i;
617 }
618 if (!yyout) {
619 fprintf (stderr, "Unable to open output file %s\n", argv[--i]);
620 return;
621 }
622
623 for (; i < argc; i++)
624 scan_file (argv[i]);
625
626 return 0;
627 }
628
629
630 void scan_file (char *filename)
631 {
632 enum filetype type = INVALID_FILE;
633 register char *p = filename + strlen (filename);
634
635 if (strcmp (p - 4, ".elc") == 0) {
636 *--p = '\0'; /* Use .el file instead */
637 type = LISP_FILE;
638 } else if (strcmp (p - 3, ".el") == 0)
639 type = LISP_FILE;
640 else if (strcmp (p - 2, ".o") == 0) {
641 *--p = 'c'; /* Use .c file instead */
642 type = C_FILE;
643 } else if (strcmp (p - 2, ".c") == 0)
644 type = C_FILE;
645
646 if (type == INVALID_FILE) {
647 fprintf (stderr, "File %s being ignored\n", filename);
648 return;
649 }
650 yyin = fopen (filename, "r");
651 if (!yyin) {
652 fprintf (stderr, "Unable to open input file %s\n", filename);
653 return;
654 }
655
656 fprintf (yyout, "/* %s */\n", filename);
657 if (type == C_FILE)
658 process_C_file ();
659 else
660 process_Lisp_file ();
661 fputc ('\n', yyout);
662
663 fclose (yyin);
664 }
665
666 void process_C_file ()
667 {
668 snarf_return_state = DO_C;
669 in_c = 1;
670 BEGIN DO_C;
671 yylex ();
672 }
673
674 void process_Lisp_file ()
675 {
676 snarf_return_state = DO_LISP;
677 in_c = 0;
678 BEGIN DO_LISP;
679 yylex ();
680 }
681