aboutsummaryrefslogtreecommitdiffstats
path: root/asn1c/asn1c.c
blob: 52b909aac3c39e91c46646d7fa645b92327e2375 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
/*-
 * Copyright (c) 2003, 2004, 2005, 2006
 * 	Lev Walkin <vlm@lionet.info>. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $Id$
 */
/*
 * This is the program that connects the libasn1* libraries together.
 * It uses them in turn to parse, fix and then compile or print the ASN.1 tree.
 */
#include "sys-common.h"

#include <asn1parser.h>		/* Parse the ASN.1 file and build a tree */
#include <asn1fix.h>		/* Fix the ASN.1 tree */
#include <asn1print.h>		/* Print the ASN.1 tree */
#include <asn1compiler.h>	/* Compile the ASN.1 tree */

#include <asn1c_compat.h>	/* Portable basename(3) and dirname(3) */

#ifdef	WIN32
#include <io.h>
#include <direct.h>
#else
#include <dirent.h>
#endif

#undef  COPYRIGHT
#define COPYRIGHT       \
	"Copyright (c) 2003, 2004, 2005, 2006 Lev Walkin <vlm@lionet.info>\n"

static void usage(const char *av0);	/* Print the Usage screen and exit */
static int importStandardModules(asn1p_t *asn, const char *skeletons_dir);

int
main(int ac, char **av) {
	enum asn1p_flags     asn1_parser_flags	= A1P_NOFLAGS;
	enum asn1f_flags     asn1_fixer_flags	= A1F_NOFLAGS;
	enum asn1c_flags     asn1_compiler_flags= A1C_NO_C99;
	enum asn1print_flags asn1_printer_flags	= APF_NOFLAGS;
	int print_arg__print_out = 0;	/* Don't compile, just print parsed */
	int print_arg__fix_n_print = 0;	/* Fix and print */
	int warnings_as_errors = 0;	/* Treat warnings as errors */
	char *skeletons_dir = NULL;	/* Directory with supplementary stuff */
	asn1p_t *asn = 0;		/* An ASN.1 parsed tree */
	int ret;			/* Return value from misc functions */
	int ch;				/* Command line character */
	int i;				/* Index in some loops */

	/*
	 * Process command-line options.
	 */
	while((ch = getopt(ac, av, "EFf:g:hLPp:RS:vW:X")) != -1)
	switch(ch) {
	case 'E':
		print_arg__print_out = 1;
		break;
	case 'F':
		print_arg__fix_n_print = 1;
		break;
	case 'f':
		if(strcmp(optarg, "all-defs-global") == 0) {
			asn1_compiler_flags |= A1C_ALL_DEFS_GLOBAL;
		} else if(strcmp(optarg, "bless-SIZE") == 0) {
			asn1_fixer_flags |= A1F_EXTENDED_SizeConstraint;
		} else if(strcmp(optarg, "compound-names") == 0) {
			asn1_compiler_flags |= A1C_COMPOUND_NAMES;
		} else if(strcmp(optarg, "indirect-choice") == 0) {
			asn1_compiler_flags |= A1C_INDIRECT_CHOICE;
		} else if(strncmp(optarg, "known-extern-type=", 18) == 0) {
			char *known_type = optarg + 18;
			ret = asn1f_make_known_external_type(known_type);
			assert(ret == 0 || errno == EEXIST);
		} else if(strcmp(optarg, "native-types") == 0) {
			asn1_compiler_flags |= A1C_USE_NATIVE_TYPES;
		} else if(strcmp(optarg, "no-constraints") == 0) {
			asn1_compiler_flags |= A1C_NO_CONSTRAINTS;
		} else if(strcmp(optarg, "no-include-deps") == 0) {
			asn1_compiler_flags |= A1C_NO_INCLUDE_DEPS;
		} else if(strcmp(optarg, "unnamed-unions") == 0) {
			asn1_compiler_flags |= A1C_UNNAMED_UNIONS;
		} else if(strcmp(optarg, "skeletons-copy") == 0) {
			asn1_compiler_flags |= A1C_SKELETONS_COPY;
		} else {
			fprintf(stderr, "-f%s: Invalid argument\n", optarg);
			exit(EX_USAGE);
		}
		break;
	case 'g':
		if(strcmp(optarg, "en-PER") == 0) {
			asn1_compiler_flags |= A1C_GEN_PER;
		} else {
			fprintf(stderr, "-g%s: Invalid argument\n", optarg);
			exit(EX_USAGE);
		}
		break;
	case 'h':
		usage(av[0]);
	case 'P':
		asn1_compiler_flags |= A1C_PRINT_COMPILED;
		asn1_compiler_flags &= ~A1C_NO_C99;
		break;
	case 'p':
		if(strncmp(optarg, "du=", 3) == 0) {
			char *pduname = optarg + 3;
			if(strcmp(pduname, "auto")) {
				fprintf(stderr, "-pdu=%s: expected -pdu=auto\n",
					pduname);
				exit(EX_USAGE);
			}
			asn1_compiler_flags |= A1C_PDU_AUTO;
		} else if(strcmp(optarg, "rint-class-matrix") == 0) {
			asn1_printer_flags |= APF_PRINT_CLASS_MATRIX;
		} else if(strcmp(optarg, "rint-constraints") == 0) {
			asn1_printer_flags |= APF_PRINT_CONSTRAINTS;
		} else if(strcmp(optarg, "rint-lines") == 0) {
			asn1_printer_flags |= APF_LINE_COMMENTS;
		} else {
			fprintf(stderr, "-p%s: Invalid argument\n", optarg);
			exit(EX_USAGE);
		}
		break;
	case 'R':
		asn1_compiler_flags |= A1C_OMIT_SUPPORT_CODE;
		break;
	case 'S':
		skeletons_dir = optarg;
		break;
	case 'v':
		fprintf(stderr, "ASN.1 Compiler, v" VERSION "\n" COPYRIGHT);
		exit(0);
		break;
	case 'W':
		if(strcmp(optarg, "error") == 0) {
			warnings_as_errors = 1;
			break;
		} else if(strcmp(optarg, "debug-lexer") == 0) {
			asn1_parser_flags |= A1P_LEXER_DEBUG;
			break;
		} else if(strcmp(optarg, "debug-fixer") == 0) {
			asn1_fixer_flags |= A1F_DEBUG;
			break;
		} else if(strcmp(optarg, "debug-compiler") == 0) {
			asn1_compiler_flags |= A1C_DEBUG;
			break;
		} else {
			fprintf(stderr, "-W%s: Invalid argument\n", optarg);
			exit(EX_USAGE);
		}
		break;
	case 'X':
		print_arg__print_out = 1;	/* Implicit -E */
		print_arg__fix_n_print = 1;	/* Implicit -F */
		asn1_printer_flags |= APF_PRINT_XML_DTD;
		break;
	default:
		usage(av[0]);
	}

	/*
	 * Validate the options combination.
	 */
	if(!print_arg__print_out) {
		if(print_arg__fix_n_print) {
			fprintf(stderr, "Error: -F requires -E\n");
			exit(EX_USAGE);
		}
		if(asn1_printer_flags) {
			fprintf(stderr, "Error: "
				"-print-... arguments require -E\n");
			exit(EX_USAGE);
		}
	}

	/*
	 * Ensure that there are some input files present.
	 */
	if(ac > optind) {
		ac -= optind;
		av += optind;
	} else {
		char *bin_name = a1c_basename(av[0]);
		fprintf(stderr, "%s: No input files specified. "
			"Try '%s -h' for more information\n",
			bin_name, bin_name);
		exit(1);
	}

	/*
	 * Make sure the skeleton directory is out there.
	 */
	if(skeletons_dir == NULL) {
		struct stat sb;
		skeletons_dir = DATADIR;
		if((av[-optind][0] == '.' || av[-optind][1] == '/')
		&& stat(skeletons_dir, &sb)) {
			/*
			 * The default skeletons directory does not exist,
			 * compute it from my file name:
			 * ./asn1c/asn1c -> ./skeletons
			 */
			char *p;
			size_t len;

			p = a1c_dirname(av[-optind]);

			len = strlen(p) + sizeof("/../skeletons");
			skeletons_dir = malloc(len);
			assert(skeletons_dir);
			snprintf(skeletons_dir, len, "%s/../skeletons", p);
			if(stat(skeletons_dir, &sb)) {
				fprintf(stderr,
					"WARNING: skeletons are neither in "
					"\"%s\" nor in \"%s\"!\n",
					DATADIR, skeletons_dir);
				if(warnings_as_errors)
					exit(EX_OSFILE);
			}
		}
	}

	/*
	 * Iterate over input files and parse each.
	 * All syntax trees from all files will be bundled together.
	 */
	for(i = 0; i < ac; i++) {
		asn1p_t *new_asn;

		new_asn = asn1p_parse_file(av[i], asn1_parser_flags);
		if(new_asn == NULL) {
			fprintf(stderr, "Cannot parse \"%s\"\n", av[i]);
			exit(EX_DATAERR);
		}

		/*
		 * Bundle the parsed tree with existing one.
		 */
		if(asn) {
			asn1p_module_t *mod;
			while((mod = TQ_REMOVE(&(new_asn->modules), mod_next)))
				TQ_ADD(&(asn->modules), mod, mod_next);
			asn1p_free(new_asn);
		} else {
			asn = new_asn;
		}
	}

	/* These are mostly notes for the human readers */
	assert(asn);
	assert(skeletons_dir);

	/*
	 * Dump the parsed ASN.1 tree if -E specified and -F is NOT given.
	 */
	if(print_arg__print_out && !print_arg__fix_n_print) {
		if(asn1print(asn, asn1_printer_flags))
			exit(EX_SOFTWARE);
		return 0;
	}

	/*
	 * Read in the files from skeletons/standard-modules
	 */
	if(importStandardModules(asn, skeletons_dir)) {
		if(warnings_as_errors)
			exit(EX_DATAERR);
	}

	/*
	 * Process the ASN.1 specification: perform semantic checks,
	 * expand references, etc, etc.
	 * This function will emit necessary warnings and error messages.
	 */
	ret = asn1f_process(asn, asn1_fixer_flags,
		NULL /* default fprintf(stderr) */);
	switch(ret) {
	case 1:
		if(!warnings_as_errors)
			/* Fall through */
	case 0:
		break;			/* All clear */
	case -1:
		exit(EX_DATAERR);	/* Fatal failure */
	}

	/*
	 * Dump the parsed ASN.1 tree if -E specified and -F is given.
	 */
	if(print_arg__print_out && print_arg__fix_n_print) {
		if(asn1print(asn, asn1_printer_flags))
			exit(EX_SOFTWARE);
		return 0;
	}

	/*
	 * Compile the ASN.1 tree into a set of source files
	 * of another language.
	 */
	if(asn1_compile(asn, skeletons_dir, asn1_compiler_flags,
			ac + optind, av - optind)) {
		exit(EX_SOFTWARE);
	}

	return 0;
}

/*
 * Parse and import *.asn1 from skeletons/standard-modules
 */
static int
importStandardModules(asn1p_t *asn, const char *skeletons_dir) {
	asn1p_t *new_asn;
	asn1p_module_t *mod;
	const char *filename;
	char *target_dir;
	int target_dir_len;
	int len;
#ifdef	WIN32
	intptr_t dir;
	struct _finddata_t c_file;
	char *pattern;
#else
	struct dirent *dp;
	DIR *dir;
#endif
	int ret = 0;

	/* Notes for the human reader */
	assert(asn);
	assert(skeletons_dir);

	/*
	 * Figure out the standard-modules directory.
	 */
	target_dir_len = strlen(skeletons_dir)
				+ sizeof("/standard-modules") - 1;
	target_dir = malloc(target_dir_len + 1);
	assert(target_dir);
	snprintf(target_dir, target_dir_len + 1, "%s/standard-modules",
		skeletons_dir);

#ifdef	WIN32
	len = target_dir_len + sizeof("/*.asn1");
	pattern = malloc(len);
	assert(pattern);
	snprintf(pattern, len, "%s/*.asn1", target_dir);
	dir = _findfirst(pattern, &c_file);
	if(dir != -1L) {
#else
	dir = opendir(target_dir);
	if(!dir) {
#endif
		fprintf(stderr,
			"WARNING: Cannot find standard modules in %s\n",
			target_dir);
		return -1;
	}

#ifdef	WIN32
	do {
		filename = c_file.name;
#else
	while((dp = readdir(dir))) {
		char *fullname;
		filename = dp->d_name;
		len = strlen(filename);
		if(len <= 5 || strcmp(filename + len - 5, ".asn1"))
			continue;
		len = target_dir_len + 1 + len + 1;
		fullname = malloc(len);
		if(!fullname) continue;	/* Just skip it, no big deal */
		snprintf(fullname, len, "%s/%s", target_dir, filename);
		filename = fullname;
#endif

		new_asn = asn1p_parse_file(filename, A1P_NOFLAGS);
		if(new_asn == NULL) {
			fprintf(stderr, "WARNING: Cannot parse standard module \"%s\"\n", filename);
			ret = -1;
			continue;
		}

		/* Import these modules and mark them as "standard" */
		while((mod = TQ_REMOVE(&(new_asn->modules), mod_next))) {
			mod->_tags |= MT_STANDARD_MODULE;
			TQ_ADD(&(asn->modules), mod, mod_next);
		}
		asn1p_free(new_asn);

#ifdef	WIN32
	} while(_findnext(dir, &c_file) == 0);
	_findclose(dir);
#else
		free(fullname);
	} /* while(readdir()) */
	closedir(dir);
#endif

	return ret;
}

/*
 * Print the usage screen and exit(EX_USAGE).
 */
static void
usage(const char *av0) {
	fprintf(stderr,
"ASN.1 Compiler, v" VERSION "\n" COPYRIGHT
"Usage: %s [options] file ...\n"
"Options:\n"
"  -E                    Run only the ASN.1 parser and print out the tree\n"
"  -F                    During -E operation, also perform tree fixing\n"
"\n"
"  -P                    Concatenate and print the compiled text\n"
"  -R                    Restrict output (tables only, no support code)\n"
"  -S <dir>              Directory with support (skeleton?) files\n"
"                        (Default is \"%s\")\n"
"  -X                    Generate and print the XML DTD\n"
"\n"

"  -Werror               Treat warnings as errors; abort if any warning\n"
"  -Wdebug-lexer         Enable verbose debugging output from lexer\n"
"  -Wdebug-fixer         --//-- semantics processor\n"
"  -Wdebug-compiler      --//-- compiler\n"
"\n"

"  -fall-defs-global     Don't make the asn1_DEF_'s of structure members \"static\"\n"
"  -fbless-SIZE          Allow SIZE() constraint for INTEGER etc (non-std.)\n"
"  -fcompound-names      Disambiguate C's struct NAME's inside top-level types\n"
"  -findirect-choice     Compile members of CHOICE as indirect pointers\n"
"  -fknown-extern-type=<name>    Pretend the specified type is known\n"
"  -fnative-types        Use \"long\" instead of INTEGER_t whenever possible, etc.\n"
"  -fno-constraints      Do not generate constraint checking code\n"
"  -fno-include-deps     Do not generate courtesy #includes for dependencies\n"
"  -funnamed-unions      Enable unnamed unions in structures\n"
"  -fskeletons-copy      Force copying the support files\n"
"\n"

"  -gen-PER              Generate PER support code\n"
"  -pdu=auto             Generate PDU table (discover PDUs automatically)\n"
"\n"

"  -print-constraints    Explain subtype constraints (debug)\n"
"  -print-class-matrix   Print out the collected object class matrix (debug)\n"
"  -print-lines          Generate \"-- #line\" comments in -E output\n"

	,
	a1c_basename(av0), DATADIR
	);
	exit(EX_USAGE);
}