xref: /freebsd/sys/tools/makeobjops.awk (revision 42249ef2) 
1#!/usr/bin/awk -f
2
3#-
4# SPDX-License-Identifier: BSD-3-Clause
5#
6# Copyright (c) 1992, 1993
7#        The Regents of the University of California.  All rights reserved.
8#
9# Redistribution and use in source and binary forms, with or without
10# modification, are permitted provided that the following conditions
11# are met:
12# 1. Redistributions of source code must retain the above copyright
13#    notice, this list of conditions and the following disclaimer.
14# 2. Redistributions in binary form must reproduce the above copyright
15#    notice, this list of conditions and the following disclaimer in the
16#    documentation and/or other materials provided with the distribution.
17# 3. Neither the name of the University nor the names of its contributors
18#    may be used to endorse or promote products derived from this software
19#    without specific prior written permission.
20#
21# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31# SUCH DAMAGE.
32#
33# From @(#)vnode_if.sh        8.1 (Berkeley) 6/10/93
34# From @(#)makedevops.sh 1.1 1998/06/14 13:53:12 dfr Exp $
35# From @(#)makedevops.sh ?.? 1998/10/05
36# From src/sys/kern/makedevops.pl,v 1.12 1999/11/22 14:40:04 n_hibma Exp
37# From src/sys/kern/makeobjops.pl,v 1.8 2001/11/16 02:02:42 joe Exp
38#
39# $FreeBSD$
40
41#
42#   Script to produce kobj front-end sugar.
43#
44
45function usage ()
46{
47	print "usage: makeobjops.awk <srcfile.m> [-d] [-p] [-l <nr>] [-c|-h]";
48	print "where -c   produce only .c files";
49	print "      -h   produce only .h files";
50	print "      -p   use the path component in the source file for destination dir";
51	print "      -l   set line width for output files [80]";
52	print "      -d   switch on debugging";
53	exit 1;
54}
55
56function warn (msg)
57{
58	print "makeobjops.awk:", msg > "/dev/stderr";
59}
60
61function warnsrc (msg)
62{
63	warn(src ":" lineno ": " msg);
64}
65
66function debug (msg)
67{
68	if (opt_d)
69		warn(msg);
70}
71
72function die (msg)
73{
74	warn(msg);
75	exit 1;
76}
77
78#   These are just for convenience ...
79function printc(s) {if (opt_c) print s > ctmpfilename;}
80function printh(s) {if (opt_h) print s > htmpfilename;}
81
82#
83#   If a line exceeds maxlength, split it into multiple
84#   lines at commas.  Subsequent lines are indented by
85#   the specified number of spaces.
86#
87#   In other words:  Lines are split by replacing ", "
88#   by ",\n" plus indent spaces.
89#
90
91function format_line (line, maxlength, indent)
92{
93	rline = "";
94
95	while (length(line) > maxlength) {
96		#
97		#   Find the rightmost ", " so that the part
98		#   to the left of it is just within maxlength.
99		#   If there is none, give up and leave it as-is.
100		#
101		if (!match(substr(line, 1, maxlength + 1), /^.*, /))
102			break;
103		rline = rline substr(line, 1, RLENGTH - 1) "\n";
104		line = sprintf("%*s", indent, "") substr(line, RLENGTH + 1);
105	}
106	return rline line;
107}
108
109#
110#   Join an array into a string.
111#
112
113function join (separator, array, num)
114{
115	_result = ""
116	if (num) {
117		while (num > 1)
118			_result = separator array[num--] _result;
119		_result = array[1] _result;
120	}
121	return _result;
122}
123
124#
125#   Execute a system command and report if it failed.
126#
127
128function system_check (cmd)
129{
130	if ((rc = system(cmd)))
131		warn(cmd " failed (" rc ")");
132}
133
134#
135#   Handle "INTERFACE" line.
136#
137
138function handle_interface ()
139{
140	intname = $2;
141	sub(/;$/, "", intname);
142	if (intname !~ /^[a-z_][a-z0-9_]*$/) {
143		debug($0);
144		warnsrc("Invalid interface name '" intname "', use [a-z_][a-z0-9_]*");
145		error = 1;
146		return;
147	}
148	if (!/;[ 	]*$/)
149		warnsrc("Semicolon missing at end of line, no problem");
150
151	debug("Interface " intname);
152
153	printh("#ifndef _" intname "_if_h_");
154	printh("#define _" intname "_if_h_\n");
155	printc("#include \"" intname "_if.h\"\n");
156}
157
158#
159# Pass doc comments through to the C file
160#
161function handle_doc ()
162{
163	doc = ""
164	while (!/\*\//) {
165		doc = doc $0 "\n";
166		getline < src;
167		lineno++;
168	}
169	doc = doc $0 "\n";
170	return doc;
171}
172
173#
174#   Handle "CODE" and "HEADER" sections.
175#   Returns the code as-is.
176#
177
178function handle_code ()
179{
180	code = "\n";
181	getline < src;
182	indent = $0;
183	sub(/[^	 ].*$/, "", indent);	# find the indent used
184	while (!/^}/) {
185		sub("^" indent, "");	# remove the indent
186		code = code $0 "\n";
187		getline < src;
188		lineno++;;
189	}
190	return code;
191}
192
193#
194#   Handle "METHOD" and "STATICMETHOD" sections.
195#
196
197function handle_method (static, doc)
198{
199	#
200	#   Get the return type and function name and delete that from
201	#   the line. What is left is the possibly first function argument
202	#   if it is on the same line.
203	#
204	if (!intname) {
205		warnsrc("No interface name defined");
206		error = 1;
207		return;
208	}
209	sub(/^[^ 	]+[ 	]+/, "");
210	ret = $0;
211	sub(/[ 	]*\{.*$/, "", ret);
212	name = ret;
213	sub(/^.*[ 	]/, "", name);	# last element is name of method
214	sub(/[ 	]+[^ 	]+$/, "", ret);	# return type
215	debug("Method: name=" name " return type=" ret);
216
217	sub(/^[^\{]*\{[	 ]*/, "");
218
219	if (!name || !ret) {
220		debug($0);
221		warnsrc("Invalid method specification");
222		error = 1;
223		return;
224	}
225
226	if (name !~ /^[a-z_][a-z_0-9]*$/) {
227		warnsrc("Invalid method name '" name "', use [a-z_][a-z0-9_]*");
228		error = 1;
229		return;
230	}
231
232	if (methods[name]) {
233		warnsrc("Duplicate method name");
234		error = 1;
235		return;
236	}
237	methods[name] = name;
238
239	line = $0;
240	while (line !~ /\}/ && (getline < src) > 0) {
241		line = line " " $0;
242		lineno++
243	}
244
245	default_function = "";
246	if (!match(line, /\};?/)) {
247		warnsrc("Premature end of file");
248		error = 1;
249		return;
250	}
251	extra = substr(line, RSTART + RLENGTH);
252	if (extra ~ /[	 ]*DEFAULT[ 	]*[a-zA-Z_][a-zA-Z_0-9]*[ 	]*;/) {
253		default_function = extra;
254		sub(/.*DEFAULT[	 ]*/, "", default_function);
255		sub(/[; 	]+.*$/, "", default_function);
256	}
257	else if (extra && opt_d) {
258		#   Warn about garbage at end of line.
259		warnsrc("Ignored '" extra "'");
260	}
261	sub(/\};?.*$/, "", line);
262
263	#
264	#   Create a list of variables without the types prepended.
265	#
266	sub(/^[	 ]+/, "", line);	# remove leading ...
267	sub(/[ 	]+$/, "", line);	# ... and trailing whitespace
268	gsub(/[	 ]+/, " ", line);	# remove double spaces
269
270	num_arguments = split(line, arguments, / *; */) - 1;
271	delete varnames;		# list of varnames
272	num_varnames = 0;
273	for (i = 1; i <= num_arguments; i++) {
274		if (!arguments[i])
275			continue;	# skip argument if argument is empty
276		num_ar = split(arguments[i], ar, /[* 	]+/);
277		if (num_ar < 2) {	# only 1 word in argument?
278			warnsrc("no type for '" arguments[i] "'");
279			error = 1;
280			return;
281		}
282		#   Last element is name of variable.
283		varnames[++num_varnames] = ar[num_ar];
284	}
285
286	argument_list = join(", ", arguments, num_arguments);
287	varname_list = join(", ", varnames, num_varnames);
288
289	if (opt_d) {
290		warn("Arguments: " argument_list);
291		warn("Varnames: " varname_list);
292	}
293
294	mname = intname "_" name;	# method name
295	umname = toupper(mname);	# uppercase method name
296
297	firstvar = varnames[1];
298
299	if (default_function == "")
300		default_function = "kobj_error_method";
301
302	# the method description
303	printh("/** @brief Unique descriptor for the " umname "() method */");
304	printh("extern struct kobjop_desc " mname "_desc;");
305	# the method typedef
306	printh("/** @brief A function implementing the " umname "() method */");
307	prototype = "typedef " ret " " mname "_t(";
308	printh(format_line(prototype argument_list ");",
309	    line_width, length(prototype)));
310
311	# Print out the method desc
312	printc("struct kobjop_desc " mname "_desc = {");
313	printc("\t0, { &" mname "_desc, (kobjop_t)" default_function " }");
314	printc("};\n");
315
316	# Print out the method itself
317	printh(doc);
318	if (0) {		# haven't chosen the format yet
319		printh("static __inline " ret " " umname "(" varname_list ")");
320		printh("\t" join(";\n\t", arguments, num_arguments) ";");
321	}
322	else {
323		prototype = "static __inline " ret " " umname "(";
324		printh(format_line(prototype argument_list ")",
325		    line_width, length(prototype)));
326	}
327	printh("{");
328	printh("\tkobjop_t _m;");
329	if (ret != "void")
330		printh("\t" ret " rc;");
331	if (!static)
332		firstvar = "((kobj_t)" firstvar ")";
333	if (prolog != "")
334		printh(prolog);
335	printh("\tKOBJOPLOOKUP(" firstvar "->ops," mname ");");
336	rceq = (ret != "void") ? "rc = " : "";
337	printh("\t" rceq "((" mname "_t *) _m)(" varname_list ");");
338	if (epilog != "")
339		printh(epilog);
340	if (ret != "void")
341		printh("\treturn (rc);");
342	printh("}\n");
343}
344
345#
346#   Begin of the main program.
347#
348
349BEGIN {
350
351line_width = 80;
352gerror = 0;
353
354#
355#   Process the command line.
356#
357
358num_files = 0;
359
360for (i = 1; i < ARGC; i++) {
361	if (ARGV[i] ~ /^-/) {
362		#
363		#   awk doesn't have getopt(), so we have to do it ourselves.
364		#   This is a bit clumsy, but it works.
365		#
366		for (j = 2; j <= length(ARGV[i]); j++) {
367			o = substr(ARGV[i], j, 1);
368			if	(o == "c")	opt_c = 1;
369			else if	(o == "h")	opt_h = 1;
370			else if	(o == "p")	opt_p = 1;
371			else if	(o == "d")	opt_d = 1;
372			else if	(o == "l") {
373				if (length(ARGV[i]) > j) {
374					opt_l = substr(ARGV[i], j + 1);
375					break;
376				}
377				else {
378					if (++i < ARGC)
379						opt_l = ARGV[i];
380					else
381						usage();
382				}
383			}
384			else
385				usage();
386		}
387	}
388	else if (ARGV[i] ~ /\.m$/)
389		filenames[num_files++] = ARGV[i];
390	else
391		usage();
392}
393
394if (!num_files || !(opt_c || opt_h))
395	usage();
396
397if (opt_p)
398	debug("Will produce files in original not in current directory");
399
400if (opt_l) {
401	if (opt_l !~ /^[0-9]+$/ || opt_l < 1)
402		die("Invalid line width '" opt_l "'");
403	line_width = opt_l;
404	debug("Line width set to " line_width);
405}
406
407for (i = 0; i < num_files; i++)
408	debug("Filename: " filenames[i]);
409
410for (file_i = 0; file_i < num_files; file_i++) {
411	src = filenames[file_i];
412	cfilename = hfilename = src;
413	sub(/\.m$/, ".c", cfilename);
414	sub(/\.m$/, ".h", hfilename);
415	if (!opt_p) {
416		sub(/^.*\//, "", cfilename);
417		sub(/^.*\//, "", hfilename);
418	}
419
420	debug("Processing from " src " to " cfilename " / " hfilename);
421
422	ctmpfilename = cfilename ".tmp";
423	htmpfilename = hfilename ".tmp";
424
425	# Avoid a literal generated file tag here.
426	generated = "@" "generated";
427
428	common_head = \
429	    "/*\n" \
430	    " * This file is " generated " automatically.\n" \
431	    " * Do not modify anything in here by hand.\n" \
432	    " *\n" \
433	    " * Created from source file\n" \
434	    " *   " src "\n" \
435	    " * with\n" \
436	    " *   makeobjops.awk\n" \
437	    " *\n" \
438	    " * See the source file for legal information\n" \
439	    " */\n";
440
441	printc(common_head "\n" \
442	    "#include <sys/param.h>\n" \
443	    "#include <sys/queue.h>\n" \
444	    "#include <sys/kernel.h>\n" \
445	    "#include <sys/kobj.h>");
446
447	printh(common_head);
448
449	delete methods;		# clear list of methods
450	intname = "";
451	lineno = 0;
452	error = 0;		# to signal clean up and gerror setting
453	lastdoc = "";
454	prolog = "";
455	epilog = "";
456
457	while (!error && (getline < src) > 0) {
458		lineno++;
459
460		#
461		#   Take special notice of include directives.
462		#
463		if (/^#[ 	]*include[ 	]+["<][^">]+[">]/) {
464			incld = $0;
465			sub(/^#[ 	]*include[ 	]+/, "", incld);
466			debug("Included file: " incld);
467			printc("#include " incld);
468		}
469
470		sub(/#.*/, "");		# remove comments
471		sub(/^[	 ]+/, "");	# remove leading ...
472		sub(/[ 	]+$/, "");	# ... and trailing whitespace
473
474		if (/^$/) {		# skip empty lines
475		}
476		else if (/^\/\*\*/)
477			lastdoc = handle_doc();
478		else if (/^INTERFACE[ 	]+[^ 	;]*[ 	]*;?[ 	]*$/) {
479			printh(lastdoc);
480			lastdoc = "";
481			handle_interface();
482		} else if (/^CODE[ 	]*{$/)
483			printc(handle_code());
484		else if (/^HEADER[	 ]*{$/)
485			printh(handle_code());
486		else if (/^METHOD/) {
487			handle_method(0, lastdoc);
488			lastdoc = "";
489			prolog = "";
490			epilog = "";
491		} else if (/^STATICMETHOD/) {
492			handle_method(1, lastdoc);
493			lastdoc = "";
494			prolog = "";
495			epilog = "";
496		} else if (/^PROLOG[ 	]*{$/)
497			prolog = handle_code();
498		else if (/^EPILOG[ 	]*{$/)
499			epilog = handle_code();
500		else {
501			debug($0);
502			warnsrc("Invalid line encountered");
503			error = 1;
504		}
505	}
506
507	#
508	#   Print the final '#endif' in the header file.
509	#
510	printh("#endif /* _" intname "_if_h_ */");
511
512	close (ctmpfilename);
513	close (htmpfilename);
514
515	if (error) {
516		warn("Output skipped");
517		system_check("rm -f " ctmpfilename " " htmpfilename);
518		gerror = 1;
519	}
520	else {
521		if (opt_c)
522			system_check("mv -f " ctmpfilename " " cfilename);
523		if (opt_h)
524			system_check("mv -f " htmpfilename " " hfilename);
525	}
526}
527
528exit gerror;
529
530}
531