lib/asn1/gen_template.c

   1 /*
   2  * Copyright (c) 1997 - 2005 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Portions Copyright (c) 2009 Apple Inc. All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * 3. Neither the name of the Institute nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include "gen_locl.h"
  37
  38 static const char *symbol_name(const char *, const Type *);
  39 static void generate_template_type(const char *, const char **, const char *, const char *, const char *,
  40                                    Type *, int, int, int);
  41
  42 static const char *
  43 ttype_symbol(const char *basename, const Type *t)
  44 {
  45     return t->symbol->gen_name;
  46 }
  47
  48 static const char *
  49 integer_symbol(const char *basename, const Type *t)
  50 {
  51     if (t->members)
  52         return "int"; /* XXX enum foo */
  53     else if (t->range == NULL)
  54         return "heim_integer";
  55     else if (t->range->min == INT_MIN && t->range->max == INT_MAX)
  56         return "int";
  57     else if (t->range->min == 0 && t->range->max == UINT_MAX)
  58         return "unsigned";
  59     else if (t->range->min == 0 && t->range->max == INT_MAX)
  60         return "unsigned";
  61     else {
  62         abort();
  63         UNREACHABLE(return NULL);
  64     }
  65 }
  66
  67 static const char *
  68 boolean_symbol(const char *basename, const Type *t)
  69 {
  70     return "int";
  71 }
  72
  73
  74 static const char *
  75 octetstring_symbol(const char *basename, const Type *t)
  76 {
  77     return "heim_octet_string";
  78 }
  79
  80 static const char *
  81 sequence_symbol(const char *basename, const Type *t)
  82 {
  83     return basename;
  84 }
  85
  86 static const char *
  87 time_symbol(const char *basename, const Type *t)
  88 {
  89     return "time_t";
  90 }
  91
  92 static const char *
  93 tag_symbol(const char *basename, const Type *t)
  94 {
  95     return symbol_name(basename, t->subtype);
  96 }
  97
  98 static const char *
  99 generalstring_symbol(const char *basename, const Type *t)
 100 {
 101     return "heim_general_string";
 102 }
 103
 104 static const char *
 105 printablestring_symbol(const char *basename, const Type *t)
 106 {
 107     return "heim_printable_string";
 108 }
 109
 110 static const char *
 111 ia5string_symbol(const char *basename, const Type *t)
 112 {
 113     return "heim_ia5_string";
 114 }
 115
 116 static const char *
 117 visiblestring_symbol(const char *basename, const Type *t)
 118 {
 119     return "heim_visible_string";
 120 }
 121
 122 static const char *
 123 utf8string_symbol(const char *basename, const Type *t)
 124 {
 125     return "heim_utf8_string";
 126 }
 127
 128 static const char *
 129 bmpstring_symbol(const char *basename, const Type *t)
 130 {
 131     return "heim_bmp_string";
 132 }
 133
 134 static const char *
 135 universalstring_symbol(const char *basename, const Type *t)
 136 {
 137     return "heim_universal_string";
 138 }
 139
 140 static const char *
 141 oid_symbol(const char *basename, const Type *t)
 142 {
 143     return "heim_oid";
 144 }
 145
 146 static const char *
 147 bitstring_symbol(const char *basename, const Type *t)
 148 {
 149     if (t->members)
 150         return basename;
 151     return "heim_bit_string";
 152 }
 153
 154
 155
 156 struct {
 157     enum typetype type;
 158     const char *(*symbol_name)(const char *, const Type *);
 159     int is_struct;
 160 } types[] =  {
 161     { TBMPString, bmpstring_symbol, 0 },
 162     { TBitString, bitstring_symbol, 0 },
 163     { TBoolean, boolean_symbol, 0 },
 164     { TGeneralString, generalstring_symbol, 0 },
 165     { TGeneralizedTime, time_symbol, 0 },
 166     { TIA5String, ia5string_symbol, 0 },
 167     { TInteger, integer_symbol, 0 },
 168     { TOID, oid_symbol, 0 },
 169     { TOctetString, octetstring_symbol, 0 },
 170     { TPrintableString, printablestring_symbol, 0 },
 171     { TSequence, sequence_symbol, 1 },
 172     { TSequenceOf, tag_symbol, 1 },
 173     { TSetOf, tag_symbol, 1 },
 174     { TTag, tag_symbol, 1 },
 175     { TType, ttype_symbol, 1 },
 176     { TUTCTime, time_symbol, 0 },
 177     { TUniversalString, universalstring_symbol, 0 },
 178     { TVisibleString,  visiblestring_symbol, 0 },
 179     { TUTF8String, utf8string_symbol, 0 },
 180     { TChoice, sequence_symbol, 1 },
 181     { TNull, integer_symbol, 1 }
 182 };
 183
 184 static FILE *
 185 get_code_file(void)
 186 {
 187     if (!one_code_file)
 188         return templatefile;
 189     return codefile;
 190 }
 191
 192
 193 static int
 194 is_supported_type_p(const Type *t)
 195 {
 196     size_t i;
 197
 198     for (i = 0; i < sizeof(types)/sizeof(types[0]); i++)
 199         if (t->type == types[i].type)
 200             return 1;
 201     return 0;
 202 }
 203
 204 int
 205 is_template_compat (const Symbol *s)
 206 {
 207     return is_supported_type_p(s->type);
 208 }
 209
 210 static const char *
 211 symbol_name(const char *basename, const Type *t)
 212 {
 213     size_t i;
 214
 215     for (i = 0; i < sizeof(types)/sizeof(types[0]); i++)
 216         if (t->type == types[i].type)
 217             return (types[i].symbol_name)(basename, t);
 218     printf("unknown der type: %d\n", t->type);
 219     exit(1);
 220 }
 221
 222
 223 static char *
 224 partial_offset(const char *basetype, const char *name, int need_offset)
 225 {
 226     char *str;
 227     if (name == NULL || need_offset == 0)
 228         return strdup("0");
 229     if (asprintf(&str, "offsetof(struct %s, %s)", basetype, name) < 0 || str == NULL)
 230         errx(1, "malloc");
 231     return str;
 232 }
 233
 234 struct template {
 235     char *line;
 236     char *tt;
 237     char *offset;
 238     char *ptr;
 239     ASN1_TAILQ_ENTRY(template) members;
 240 };
 241
 242 ASN1_TAILQ_HEAD(templatehead, template);
 243
 244 struct tlist {
 245     char *name;
 246     char *header;
 247     struct templatehead template;
 248     ASN1_TAILQ_ENTRY(tlist) tmembers;
 249 };
 250
 251 ASN1_TAILQ_HEAD(tlisthead, tlist);
 252
 253 static void tlist_header(struct tlist *, const char *, ...) __attribute__((__format__(__printf__, 2, 3)));
 254 static struct template *
 255     add_line(struct templatehead *, const char *, ...) __attribute__((__format__(__printf__, 2, 3)));
 256 static int tlist_cmp(const struct tlist *, const struct tlist *);
 257
 258 static void add_line_pointer(struct templatehead *, const char *, const char *, const char *, ...)
 259     __attribute__((__format__(__printf__, 4, 5)));
 260
 261
 262 static struct tlisthead tlistmaster = ASN1_TAILQ_HEAD_INITIALIZER(tlistmaster);
 263 static unsigned long numdups = 0;
 264
 265 static struct tlist *
 266 tlist_new(const char *name)
 267 {
 268     struct tlist *tl = calloc(1, sizeof(*tl));
 269     tl->name = strdup(name);
 270     ASN1_TAILQ_INIT(&tl->template);
 271     return tl;
 272 }
 273
 274 static void
 275 tlist_header(struct tlist *t, const char *fmt, ...)
 276 {
 277     va_list ap;
 278     va_start(ap, fmt);
 279     if (vasprintf(&t->header, fmt, ap) < 0 || t->header == NULL)
 280         errx(1, "malloc");
 281     va_end(ap);
 282 }
 283
 284 static unsigned long
 285 tlist_count(struct tlist *tl)
 286 {
 287     unsigned int count = 0;
 288     struct template *q;
 289
 290     ASN1_TAILQ_FOREACH(q, &tl->template, members) {
 291         count++;
 292     }
 293     return count;
 294 }
 295
 296 static void
 297 tlist_add(struct tlist *tl)
 298 {
 299     ASN1_TAILQ_INSERT_TAIL(&tlistmaster, tl, tmembers);
 300 }
 301
 302 static void
 303 tlist_print(struct tlist *tl)
 304 {
 305     struct template *q;
 306     unsigned int i = 1;
 307     FILE *f = get_code_file();
 308
 309     fprintf(f, "static const struct asn1_template asn1_%s[] = {\n", tl->name);
 310     fprintf(f, "/* 0 */ %s,\n", tl->header);
 311     ASN1_TAILQ_FOREACH(q, &tl->template, members) {
 312         int last = (ASN1_TAILQ_LAST(&tl->template, templatehead) == q);
 313         fprintf(f, "/* %lu */ %s%s\n", (unsigned long)i++, q->line, last ? "" : ",");
 314     }
 315     fprintf(f, "};\n");
 316 }
 317
 318 static struct tlist *
 319 tlist_find_by_name(const char *name)
 320 {
 321     struct tlist *ql;
 322     ASN1_TAILQ_FOREACH(ql, &tlistmaster, tmembers) {
 323         if (strcmp(ql->name, name) == 0)
 324             return ql;
 325     }
 326     return NULL;
 327 }
 328
 329 static int
 330 tlist_cmp_name(const char *tname, const char *qname)
 331 {
 332     struct tlist *tl = tlist_find_by_name(tname);
 333     struct tlist *ql = tlist_find_by_name(qname);
 334     return tlist_cmp(tl, ql);
 335 }
 336
 337 static int
 338 tlist_cmp(const struct tlist *tl, const struct tlist *ql)
 339 {
 340     int ret;
 341     struct template *t, *q;
 342
 343     ret = strcmp(tl->header, ql->header);
 344     if (ret) return ret;
 345
 346     q = ASN1_TAILQ_FIRST(&ql->template);
 347     ASN1_TAILQ_FOREACH(t, &tl->template, members) {
 348         if (q == NULL) return 1;
 349
 350         if (t->ptr == NULL || q->ptr == NULL) {
 351             ret = strcmp(t->line, q->line);
 352             if (ret) return ret;
 353         } else {
 354             ret = strcmp(t->tt, q->tt);
 355             if (ret) return ret;
 356
 357             ret = strcmp(t->offset, q->offset);
 358             if (ret) return ret;
 359
 360             if ((ret = strcmp(t->ptr, q->ptr)) != 0 ||
 361                 (ret = tlist_cmp_name(t->ptr, q->ptr)) != 0)
 362                 return ret;
 363         }
 364         q = ASN1_TAILQ_NEXT(q, members);
 365     }
 366     if (q != NULL) return -1;
 367     return 0;
 368 }
 369
 370
 371 static const char *
 372 tlist_find_dup(const struct tlist *tl)
 373 {
 374     struct tlist *ql;
 375
 376     ASN1_TAILQ_FOREACH(ql, &tlistmaster, tmembers) {
 377         if (tlist_cmp(ql, tl) == 0) {
 378             numdups++;
 379             return ql->name;
 380         }
 381     }
 382     return NULL;
 383 }
 384
 385
 386 /*
 387  *
 388  */
 389
 390 static struct template *
 391 add_line(struct templatehead *t, const char *fmt, ...)
 392 {
 393     struct template *q = calloc(1, sizeof(*q));
 394     va_list ap;
 395     va_start(ap, fmt);
 396     if (vasprintf(&q->line, fmt, ap) < 0 || q->line == NULL)
 397         errx(1, "malloc");
 398     va_end(ap);
 399     ASN1_TAILQ_INSERT_TAIL(t, q, members);
 400     return q;
 401 }
 402
 403 static void
 404 add_line_pointer(struct templatehead *t,
 405                  const char *ptr,
 406                  const char *offset,
 407                  const char *ttfmt,
 408                  ...)
 409 {
 410     struct template *q;
 411     va_list ap;
 412     char *tt = NULL;
 413
 414     va_start(ap, ttfmt);
 415     if (vasprintf(&tt, ttfmt, ap) < 0 || tt == NULL)
 416         errx(1, "malloc");
 417     va_end(ap);
 418
 419     q = add_line(t, "{ %s, %s, asn1_%s }", tt, offset, ptr);
 420     q->tt = tt;
 421     q->offset = strdup(offset);
 422     q->ptr = strdup(ptr);
 423 }
 424
 425 static int
 426 use_extern(const Symbol *s)
 427 {
 428     if (s->type == NULL)
 429         return 1;
 430     return 0;
 431 }
 432
 433 static int
 434 is_struct(Type *t, int isstruct)
 435 {
 436     size_t i;
 437
 438     if (t->type == TType)
 439         return 0;
 440     if (t->type == TSequence || t->type == TSet || t->type == TChoice)
 441         return 1;
 442     if (t->type == TTag)
 443         return is_struct(t->subtype, isstruct);
 444
 445     for (i = 0; i < sizeof(types)/sizeof(types[0]); i++) {
 446         if (t->type == types[i].type) {
 447             if (types[i].is_struct == 0)
 448                 return 0;
 449             else
 450                 break;
 451         }
 452     }
 453
 454     return isstruct;
 455 }
 456
 457 static const Type *
 458 compact_tag(const Type *t)
 459 {
 460     while (t->type == TTag)
 461         t = t->subtype;
 462     return t;
 463 }
 464
 465 static void
 466 template_members(struct templatehead *temp, const char *basetype, const char *name, const Type *t, int optional, int isstruct, int need_offset)
 467 {
 468     char *poffset = NULL;
 469
 470     if (optional && t->type != TTag && t->type != TType)
 471         errx(1, "%s...%s is optional and not a (TTag or TType)", basetype, name);
 472
 473     poffset = partial_offset(basetype, name, need_offset);
 474
 475     switch (t->type) {
 476     case TType:
 477         if (use_extern(t->symbol)) {
 478             add_line(temp, "{ A1_OP_TYPE_EXTERN %s, %s, &asn1_extern_%s}",
 479                      optional ? "|A1_FLAG_OPTIONAL" : "",
 480                      poffset, t->symbol->gen_name);
 481         } else {
 482             add_line_pointer(temp, t->symbol->gen_name, poffset,
 483                              "A1_OP_TYPE %s", optional ? "|A1_FLAG_OPTIONAL" : "");
 484         }
 485         break;
 486     case TInteger: {
 487         char *itype = NULL;
 488
 489         if (t->members)
 490             itype = "IMEMBER";
 491         else if (t->range == NULL)
 492             itype = "HEIM_INTEGER";
 493         else if (t->range->min == INT_MIN && t->range->max == INT_MAX)
 494             itype = "INTEGER";
 495         else if (t->range->min == 0 && t->range->max == UINT_MAX)
 496             itype = "UNSIGNED";
 497         else if (t->range->min == 0 && t->range->max == INT_MAX)
 498             itype = "UNSIGNED";
 499         else
 500             errx(1, "%s: unsupported range %d -> %d",
 501                  name, t->range->min, t->range->max);
 502
 503         add_line(temp, "{ A1_PARSE_T(A1T_%s), %s, NULL }", itype, poffset);
 504         break;
 505     }
 506     case TGeneralString:
 507         add_line(temp, "{ A1_PARSE_T(A1T_GENERAL_STRING), %s, NULL }", poffset);
 508         break;
 509     case TTeletexString:
 510         add_line(temp, "{ A1_PARSE_T(A1T_TELETEX_STRING), %s, NULL }", poffset);
 511         break;
 512     case TPrintableString:
 513         add_line(temp, "{ A1_PARSE_T(A1T_PRINTABLE_STRING), %s, NULL }", poffset);
 514         break;
 515     case TOctetString:
 516         add_line(temp, "{ A1_PARSE_T(A1T_OCTET_STRING), %s, NULL }", poffset);
 517         break;
 518     case TIA5String:
 519         add_line(temp, "{ A1_PARSE_T(A1T_IA5_STRING), %s, NULL }", poffset);
 520         break;
 521     case TBMPString:
 522         add_line(temp, "{ A1_PARSE_T(A1T_BMP_STRING), %s, NULL }", poffset);
 523         break;
 524     case TUniversalString:
 525         add_line(temp, "{ A1_PARSE_T(A1T_UNIVERSAL_STRING), %s, NULL }", poffset);
 526         break;
 527     case TVisibleString:
 528         add_line(temp, "{ A1_PARSE_T(A1T_VISIBLE_STRING), %s, NULL }", poffset);
 529         break;
 530     case TUTF8String:
 531         add_line(temp, "{ A1_PARSE_T(A1T_UTF8_STRING), %s, NULL }", poffset);
 532         break;
 533     case TGeneralizedTime:
 534         add_line(temp, "{ A1_PARSE_T(A1T_GENERALIZED_TIME), %s, NULL }", poffset);
 535         break;
 536     case TUTCTime:
 537         add_line(temp, "{ A1_PARSE_T(A1T_UTC_TIME), %s, NULL }", poffset);
 538         break;
 539     case TBoolean:
 540         add_line(temp, "{ A1_PARSE_T(A1T_BOOLEAN), %s, NULL }", poffset);
 541         break;
 542     case TOID:
 543         add_line(temp, "{ A1_PARSE_T(A1T_OID), %s, NULL }", poffset);
 544         break;
 545     case TNull:
 546         break;
 547     case TBitString: {
 548         struct templatehead template = ASN1_TAILQ_HEAD_INITIALIZER(template);
 549         struct template *q;
 550         Member *m;
 551         size_t count = 0, i;
 552         char *bname = NULL;
 553         FILE *f = get_code_file();
 554
 555         if (ASN1_TAILQ_EMPTY(t->members)) {
 556             add_line(temp, "{ A1_PARSE_T(A1T_HEIM_BIT_STRING), %s, NULL }", poffset);
 557             break;
 558         }
 559
 560         if (asprintf(&bname, "bmember_%s_%p", name ? name : "", t) < 0 || bname == NULL)
 561             errx(1, "malloc");
 562         output_name(bname);
 563
 564         ASN1_TAILQ_FOREACH(m, t->members, members) {
 565             add_line(&template, "{ 0, %d, 0 } /* %s */", m->val, m->gen_name);
 566         }
 567
 568         ASN1_TAILQ_FOREACH(q, &template, members) {
 569             count++;
 570         }
 571
 572         fprintf(f, "static const struct asn1_template asn1_%s_%s[] = {\n", basetype, bname);
 573         fprintf(f, "/* 0 */ { 0%s, sizeof(%s), ((void *)%lu) },\n",
 574                 rfc1510_bitstring ? "|A1_HBF_RFC1510" : "",
 575                 basetype, (unsigned long)count);
 576         i = 1;
 577         ASN1_TAILQ_FOREACH(q, &template, members) {
 578             int last = (ASN1_TAILQ_LAST(&template, templatehead) == q);
 579             fprintf(f, "/* %lu */ %s%s\n", (unsigned long)i++, q->line, last ? "" : ",");
 580         }
 581         fprintf(f, "};\n");
 582
 583         add_line(temp, "{ A1_OP_BMEMBER, %s, asn1_%s_%s }", poffset, basetype, bname);
 584
 585         free(bname);
 586
 587         break;
 588     }
 589     case TSequence: {
 590         Member *m;
 591
 592         ASN1_TAILQ_FOREACH(m, t->members, members) {
 593             char *newbasename = NULL;
 594
 595             if (m->ellipsis)
 596                 continue;
 597
 598             if (name) {
 599                 if (asprintf(&newbasename, "%s_%s", basetype, name) < 0)
 600                     errx(1, "malloc");
 601             } else
 602                 newbasename = strdup(basetype);
 603             if (newbasename == NULL)
 604                 errx(1, "malloc");
 605
 606             template_members(temp, newbasename, m->gen_name, m->type, m->optional, isstruct, 1);
 607
 608             free(newbasename);
 609         }
 610
 611         break;
 612     }
 613     case TTag: {
 614         char *tname = NULL, *elname = NULL;
 615         const char *sename, *dupname;
 616         int subtype_is_struct = is_struct(t->subtype, isstruct);
 617
 618         if (subtype_is_struct)
 619             sename = basetype;
 620         else
 621             sename = symbol_name(basetype, t->subtype);
 622
 623         if (asprintf(&tname, "tag_%s_%p", name ? name : "", t) < 0 || tname == NULL)
 624             errx(1, "malloc");
 625         output_name(tname);
 626
 627         if (asprintf(&elname, "%s_%s", basetype, tname) < 0 || elname == NULL)
 628             errx(1, "malloc");
 629
 630         generate_template_type(elname, &dupname, NULL, sename, name,
 631                                t->subtype, 0, subtype_is_struct, 0);
 632
 633         add_line_pointer(temp, dupname, poffset,
 634                          "A1_TAG_T(%s,%s,%s)%s",
 635                          classname(t->tag.tagclass),
 636                          is_primitive_type(t->subtype->type)  ? "PRIM" : "CONS",
 637                          valuename(t->tag.tagclass, t->tag.tagvalue),
 638                          optional ? "|A1_FLAG_OPTIONAL" : "");
 639
 640         free(tname);
 641         free(elname);
 642
 643         break;
 644     }
 645     case TSetOf:
 646     case TSequenceOf: {
 647         const char *type = NULL, *tname, *dupname;
 648         char *sename = NULL, *elname = NULL;
 649         int subtype_is_struct = is_struct(t->subtype, 0);
 650
 651         if (name && subtype_is_struct) {
 652             tname = "seofTstruct";
 653             if (asprintf(&sename, "%s_%s_val", basetype, name) < 0)
 654                 errx(1, "malloc");
 655         } else if (subtype_is_struct) {
 656             tname = "seofTstruct";
 657             if (asprintf(&sename, "%s_val", symbol_name(basetype, t->subtype)) < 0)
 658                 errx(1, "malloc");
 659         } else {
 660             if (name)
 661                 tname = name;
 662             else
 663                 tname = "seofTstruct";
 664             sename = strdup(symbol_name(basetype, t->subtype));
 665         }
 666         if (sename == NULL)
 667             errx(1, "malloc");
 668
 669         if (t->type == TSetOf) type = "A1_OP_SETOF";
 670         else if (t->type == TSequenceOf) type = "A1_OP_SEQOF";
 671         else abort();
 672
 673         if (asprintf(&elname, "%s_%s_%p", basetype, tname, t) < 0 || elname == NULL)
 674             errx(1, "malloc");
 675
 676         generate_template_type(elname, &dupname, NULL, sename, NULL, t->subtype,
 677                                0, subtype_is_struct, need_offset);
 678
 679         add_line(temp, "{ %s, %s, asn1_%s }", type, poffset, dupname);
 680         free(sename);
 681         break;
 682     }
 683     case TChoice: {
 684         struct templatehead template = ASN1_TAILQ_HEAD_INITIALIZER(template);
 685         struct template *q;
 686         size_t count = 0, i;
 687         char *tname = NULL;
 688         FILE *f = get_code_file();
 689         Member *m;
 690         int ellipsis = 0;
 691         char *e;
 692
 693         if (asprintf(&tname, "asn1_choice_%s_%s%x",
 694                      basetype, name ? name : "", (unsigned int)(uintptr_t)t) < 0 || tname == NULL)
 695             errx(1, "malloc");
 696
 697         ASN1_TAILQ_FOREACH(m, t->members, members) {
 698             const char *dupname;
 699             char *elname = NULL;
 700             char *newbasename = NULL;
 701             int subtype_is_struct;
 702
 703             if (m->ellipsis) {
 704                 ellipsis = 1;
 705                 continue;
 706             }
 707
 708             subtype_is_struct = is_struct(m->type, 0);
 709
 710             if (asprintf(&elname, "%s_choice_%s", basetype, m->gen_name) < 0 || elname == NULL)
 711                 errx(1, "malloc");
 712
 713             if (subtype_is_struct) {
 714                 if (asprintf(&newbasename, "%s_%s", basetype, m->gen_name) < 0)
 715                     errx(1, "malloc");
 716             } else
 717                 newbasename = strdup(basetype);
 718
 719             if (newbasename == NULL)
 720                 errx(1, "malloc");
 721
 722
 723             generate_template_type(elname, &dupname, NULL,
 724                                    symbol_name(newbasename, m->type),
 725                                    NULL, m->type, 0, subtype_is_struct, 1);
 726
 727             add_line(&template, "{ %s, offsetof(%s%s, u.%s), asn1_%s }",
 728                      m->label, isstruct ? "struct " : "",
 729                      basetype, m->gen_name,
 730                      dupname);
 731
 732             free(elname);
 733             free(newbasename);
 734         }
 735
 736         e = NULL;
 737         if (ellipsis) {
 738             if (asprintf(&e, "offsetof(%s%s, u.asn1_ellipsis)", isstruct ? "struct " : "", basetype) < 0 || e == NULL)
 739                 errx(1, "malloc");
 740         }
 741
 742         ASN1_TAILQ_FOREACH(q, &template, members) {
 743             count++;
 744         }
 745
 746         fprintf(f, "static const struct asn1_template %s[] = {\n", tname);
 747         fprintf(f, "/* 0 */ { %s, offsetof(%s%s, element), ((void *)%lu) },\n",
 748                 e ? e : "0", isstruct ? "struct " : "", basetype, (unsigned long)count);
 749         i = 1;
 750         ASN1_TAILQ_FOREACH(q, &template, members) {
 751             int last = (ASN1_TAILQ_LAST(&template, templatehead) == q);
 752             fprintf(f, "/* %lu */ %s%s\n", (unsigned long)i++, q->line, last ? "" : ",");
 753         }
 754         fprintf(f, "};\n");
 755
 756         add_line(temp, "{ A1_OP_CHOICE, %s, %s }", poffset, tname);
 757
 758         free(e);
 759         free(tname);
 760         break;
 761     }
 762     default:
 763         abort ();
 764     }
 765     if (poffset)
 766         free(poffset);
 767 }
 768
 769 static void
 770 gen_extern_stubs(FILE *f, const char *name)
 771 {
 772     fprintf(f,
 773             "static const struct asn1_type_func asn1_extern_%s = {\n"
 774             "\t(asn1_type_encode)encode_%s,\n"
 775             "\t(asn1_type_decode)decode_%s,\n"
 776             "\t(asn1_type_length)length_%s,\n"
 777             "\t(asn1_type_copy)copy_%s,\n"
 778             "\t(asn1_type_release)free_%s,\n"
 779             "\tsizeof(%s)\n"
 780             "};\n",
 781             name, name, name, name,
 782             name, name, name);
 783 }
 784
 785 void
 786 gen_template_import(const Symbol *s)
 787 {
 788     FILE *f = get_code_file();
 789
 790     if (template_flag == 0)
 791         return;
 792
 793     gen_extern_stubs(f, s->gen_name);
 794 }
 795
 796 static void
 797 generate_template_type(const char *varname,
 798                        const char **dupname,
 799                        const char *symname,
 800                        const char *basetype,
 801                        const char *name,
 802                        Type *type,
 803                        int optional, int isstruct, int need_offset)
 804 {
 805     struct tlist *tl;
 806     const char *dup;
 807     int have_ellipsis = 0;
 808
 809     tl = tlist_new(varname);
 810
 811     template_members(&tl->template, basetype, name, type, optional, isstruct, need_offset);
 812
 813     /* if its a sequence or set type, check if there is a ellipsis */
 814     if (type->type == TSequence || type->type == TSet) {
 815         Member *m;
 816         ASN1_TAILQ_FOREACH(m, type->members, members) {
 817             if (m->ellipsis)
 818                 have_ellipsis = 1;
 819         }
 820     }
 821
 822     if (ASN1_TAILQ_EMPTY(&tl->template) && compact_tag(type)->type != TNull)
 823         errx(1, "Tag %s...%s with no content ?", basetype, name ? name : "");
 824
 825     tlist_header(tl, "{ 0%s%s, sizeof(%s%s), ((void *)%lu) }",
 826                  (symname && preserve_type(symname)) ? "|A1_HF_PRESERVE" : "",
 827                  have_ellipsis ? "|A1_HF_ELLIPSIS" : "",
 828                  isstruct ? "struct " : "", basetype, tlist_count(tl));
 829
 830     dup = tlist_find_dup(tl);
 831     if (dup) {
 832         if (strcmp(dup, tl->name) == 0)
 833             errx(1, "found dup of ourself");
 834         *dupname = dup;
 835     } else {
 836         *dupname = tl->name;
 837         tlist_print(tl);
 838         tlist_add(tl);
 839     }
 840 }
 841
 842
 843 void
 844 generate_template(const Symbol *s)
 845 {
 846     FILE *f = get_code_file();
 847     const char *dupname;
 848
 849     if (use_extern(s)) {
 850         gen_extern_stubs(f, s->gen_name);
 851         return;
 852     }
 853
 854     generate_template_type(s->gen_name, &dupname, s->name, s->gen_name, NULL, s->type, 0, 0, 1);
 855
 856     fprintf(f,
 857             "\n"
 858             "int\n"
 859             "decode_%s(const unsigned char *p, size_t len, %s *data, size_t *size)\n"
 860             "{\n"
 861             "    return _asn1_decode_top(asn1_%s, 0|%s, p, len, data, size);\n"
 862             "}\n"
 863             "\n",
 864             s->gen_name,
 865             s->gen_name,
 866             dupname,
 867             support_ber ? "A1_PF_ALLOW_BER" : "0");
 868
 869     fprintf(f,
 870             "\n"
 871             "int\n"
 872             "encode_%s(unsigned char *p, size_t len, const %s *data, size_t *size)\n"
 873             "{\n"
 874             "    return _asn1_encode(asn1_%s, p, len, data, size);\n"
 875             "}\n"
 876             "\n",
 877             s->gen_name,
 878             s->gen_name,
 879             dupname);
 880
 881     fprintf(f,
 882             "\n"
 883             "size_t\n"
 884             "length_%s(const %s *data)\n"
 885             "{\n"
 886             "    return _asn1_length(asn1_%s, data);\n"
 887             "}\n"
 888             "\n",
 889             s->gen_name,
 890             s->gen_name,
 891             dupname);
 892
 893
 894     fprintf(f,
 895             "\n"
 896             "void\n"
 897             "free_%s(%s *data)\n"
 898             "{\n"
 899             "    _asn1_free(asn1_%s, data);\n"
 900             "}\n"
 901             "\n",
 902             s->gen_name,
 903             s->gen_name,
 904             dupname);
 905
 906     fprintf(f,
 907             "\n"
 908             "int\n"
 909             "copy_%s(const %s *from, %s *to)\n"
 910             "{\n"
 911             "    return _asn1_copy_top(asn1_%s, from, to);\n"
 912             "}\n"
 913             "\n",
 914             s->gen_name,
 915             s->gen_name,
 916             s->gen_name,
 917             dupname);
 918 }