tools/protoparse.h

   1
   2 struct parsed_proto;
   3
   4 struct parsed_type {
   5         char *name;
   6         unsigned int is_array:1;
   7         unsigned int is_ptr:1;
   8         unsigned int is_struct:1; // split for args
   9 };
  10
  11 struct parsed_proto_arg {
  12         char *reg;
  13         struct parsed_type type;
  14         struct parsed_proto *fptr;
  15         void *datap;
  16 };
  17
  18 struct parsed_proto {
  19         char name[256];
  20         union {
  21                 struct parsed_type ret_type;
  22                 struct parsed_type type;
  23         };
  24         struct parsed_proto_arg arg[16];
  25         int argc;
  26         int argc_stack;
  27         int argc_reg;
  28         unsigned int is_func:1;
  29         unsigned int is_stdcall:1;
  30         unsigned int is_fastcall:1;
  31         unsigned int is_vararg:1;     // vararg func
  32         unsigned int is_fptr:1;
  33         unsigned int is_noreturn:1;
  34         unsigned int is_unresolved:1;
  35         unsigned int is_arg:1;        // decl in func arg
  36         unsigned int has_structarg:1;
  37 };
  38
  39 static const char *hdrfn;
  40 static int hdrfline = 0;
  41
  42 static void pp_copy_arg(struct parsed_proto_arg *d,
  43         const struct parsed_proto_arg *s);
  44
  45 static int b_pp_c_handler(char *proto, const char *fname);
  46
  47 static int do_protostrs(FILE *fhdr, const char *fname)
  48 {
  49         const char *finc_name;
  50         const char *hdrfn_saved;
  51         char protostr[256];
  52         char path[256];
  53         char fname_inc[256];
  54         FILE *finc;
  55         int line = 0;
  56         int ret;
  57         char *p;
  58
  59         hdrfn_saved = hdrfn;
  60         hdrfn = fname;
  61
  62         while (fgets(protostr, sizeof(protostr), fhdr))
  63         {
  64                 line++;
  65                 if (strncmp(protostr, "//#include ", 11) == 0) {
  66                         finc_name = protostr + 11;
  67                         p = strpbrk(finc_name, "\r\n ");
  68                         if (p != NULL)
  69                                 *p = 0;
  70
  71                         path[0] = 0;
  72                         p = strrchr(hdrfn_saved, '/');
  73                         if (p) {
  74                                 memcpy(path, hdrfn_saved,
  75                                         p - hdrfn_saved + 1);
  76                                 path[p - hdrfn_saved + 1] = 0;
  77                         }
  78                         snprintf(fname_inc, sizeof(fname_inc), "%s%s",
  79                                 path, finc_name);
  80                         finc = fopen(fname_inc, "r");
  81                         if (finc == NULL) {
  82                                 printf("%s:%d: can't open '%s'\n",
  83                                         fname_inc, line, finc_name);
  84                                 continue;
  85                         }
  86                         ret = do_protostrs(finc, finc_name);
  87                         fclose(finc);
  88                         if (ret < 0)
  89                                 break;
  90                         continue;
  91                 }
  92                 if (strncmp(sskip(protostr), "//", 2) == 0)
  93                         continue;
  94
  95                 p = protostr + strlen(protostr);
  96                 for (p--; p >= protostr && my_isblank(*p); --p)
  97                         *p = 0;
  98                 if (p < protostr)
  99                         continue;
 100
 101                 hdrfline = line;
 102
 103                 ret = b_pp_c_handler(protostr, hdrfn);
 104                 if (ret < 0)
 105                         break;
 106         }
 107
 108         hdrfn = hdrfn_saved;
 109
 110         if (feof(fhdr))
 111                 return 0;
 112
 113         return -1;
 114 }
 115
 116 static int get_regparm(char *dst, size_t dlen, char *p)
 117 {
 118         int i, o;
 119
 120         if (*p != '<')
 121                 return 0;
 122
 123         for (o = 0, i = 1; o < dlen; i++) {
 124                 if (p[i] == 0)
 125                         return 0;
 126                 if (p[i] == '>')
 127                         break;
 128                 dst[o++] = p[i];
 129         }
 130         dst[o] = 0;
 131         return i + 1;
 132 }
 133
 134 // hmh..
 135 static const char *known_type_mod[] = {
 136         "const",
 137         "signed",
 138         "unsigned",
 139         "struct",
 140         "enum",
 141         "CONST",
 142         "volatile",
 143 };
 144
 145 static const char *known_ptr_types[] = {
 146         "FARPROC",
 147         "WNDPROC",
 148         "HACCEL",
 149         "HANDLE",
 150         "HBITMAP",
 151         "HCURSOR",
 152         "HDC",
 153         "HFONT",
 154         "HGDIOBJ",
 155         "HGLOBAL",
 156         "HICON",
 157         "HINSTANCE",
 158         //"HIMC", // DWORD
 159         "HMODULE",
 160         "HPALETTE",
 161         "HRGN",
 162         "HRSRC",
 163         "HKEY",
 164         "HMENU",
 165         "HWND",
 166         "PBYTE",
 167         "PCRITICAL_SECTION",
 168         "PDWORD",
 169         "PFILETIME",
 170         "PHKEY",
 171         "PLONG",
 172         "PMEMORY_BASIC_INFORMATION",
 173         "PUINT",
 174         "PVOID",
 175         "PCVOID",
 176         "PWORD",
 177         "DLGPROC",
 178         "TIMERPROC",
 179         "WNDENUMPROC",
 180         "va_list",
 181         "__VALIST",
 182 };
 183
 184 static const char *ignored_keywords[] = {
 185         "extern",
 186         "WINBASEAPI",
 187         "WINUSERAPI",
 188         "WINGDIAPI",
 189         "WINADVAPI",
 190 };
 191
 192 // returns ptr to char after type ends
 193 static int typecmp(const char *n, const char *t)
 194 {
 195         for (; *t != 0; n++, t++) {
 196                 while (n[0] == ' ' && (n[1] == ' ' || n[1] == '*'))
 197                         n++;
 198                 while (t[0] == ' ' && (t[1] == ' ' || t[1] == '*'))
 199                         t++;
 200                 if (*n != *t)
 201                         return *n - *t;
 202         }
 203
 204         return 0;
 205 }
 206
 207 static const char *skip_type_mod(const char *n)
 208 {
 209         int len;
 210         int i;
 211
 212         for (i = 0; i < ARRAY_SIZE(known_type_mod); i++) {
 213                 len = strlen(known_type_mod[i]);
 214                 if (strncmp(n, known_type_mod[i], len) != 0)
 215                         continue;
 216                 if (!my_isblank(n[len]))
 217                         continue;
 218
 219                 n += len;
 220                 while (my_isblank(*n))
 221                         n++;
 222                 i = 0;
 223         }
 224
 225         return n;
 226 }
 227
 228 static int check_type(const char *name, struct parsed_type *type)
 229 {
 230         const char *n, *n1;
 231         int ret = -1;
 232         int i;
 233
 234         n = skip_type_mod(name);
 235
 236         for (i = 0; i < ARRAY_SIZE(known_ptr_types); i++) {
 237                 if (typecmp(n, known_ptr_types[i]))
 238                         continue;
 239
 240                 type->is_ptr = 1;
 241                 break;
 242         }
 243
 244         if (n[0] == 'L' && n[1] == 'P' && strncmp(n, "LPARAM", 6))
 245                 type->is_ptr = 1;
 246
 247         // assume single word
 248         while (!my_isblank(*n) && !my_issep(*n))
 249                 n++;
 250
 251         while (1) {
 252                 n1 = n;
 253                 while (my_isblank(*n))
 254                         n++;
 255                 if (*n == '*') {
 256                         type->is_ptr = 1;
 257                         n++;
 258                         continue;
 259                 }
 260                 break;
 261         }
 262
 263         ret = n1 - name;
 264         type->name = strndup(name, ret);
 265         if (IS(type->name, "VOID"))
 266                 memcpy(type->name, "void", 4);
 267
 268         return ret;
 269 }
 270
 271 /* args are always expanded to 32bit */
 272 static const char *map_reg(const char *reg)
 273 {
 274         const char *regs_f[] = { "eax", "ebx", "ecx", "edx", "esi", "edi" };
 275         const char *regs_w[] = { "ax",  "bx",  "cx",  "dx",  "si",  "di" };
 276         const char *regs_b[] = { "al",  "bl",  "cl",  "dl" };
 277         int i;
 278
 279         for (i = 0; i < ARRAY_SIZE(regs_w); i++)
 280                 if (IS(reg, regs_w[i]))
 281                         return regs_f[i];
 282
 283         for (i = 0; i < ARRAY_SIZE(regs_b); i++)
 284                 if (IS(reg, regs_b[i]))
 285                         return regs_f[i];
 286
 287         return reg;
 288 }
 289
 290 static int check_struct_arg(struct parsed_proto_arg *arg)
 291 {
 292         if (IS(arg->type.name, "POINT"))
 293                 return 2 - 1;
 294
 295         return 0;
 296 }
 297
 298 static int parse_protostr(char *protostr, struct parsed_proto *pp)
 299 {
 300         struct parsed_proto_arg *arg;
 301         char regparm[16];
 302         char buf[256];
 303         char cconv[32];
 304         int xarg = 0;
 305         char *p, *p1;
 306         int i, l;
 307         int ret;
 308
 309         p = sskip(protostr);
 310         if (p[0] == '/' && p[1] == '/') {
 311                 printf("%s:%d: commented out?\n", hdrfn, hdrfline);
 312                 p = sskip(p + 2);
 313         }
 314
 315         // strip unneeded stuff
 316         for (p1 = p; p1[0] != 0 && p1[1] != 0; p1++) {
 317                 if ((p1[0] == '/' && p1[1] == '*')
 318                  || (p1[0] == '*' && p1[1] == '/'))
 319                         p1[0] = p1[1] = ' ';
 320         }
 321
 322         if (!strncmp(p, "DECLSPEC_NORETURN ", 18)) {
 323                 pp->is_noreturn = 1;
 324                 p = sskip(p + 18);
 325         }
 326
 327         for (i = 0; i < ARRAY_SIZE(ignored_keywords); i++) {
 328                 l = strlen(ignored_keywords[i]);
 329                 if (!strncmp(p, ignored_keywords[i], l) && my_isblank(p[l]))
 330                         p = sskip(p + l + 1);
 331         }
 332
 333         ret = check_type(p, &pp->ret_type);
 334         if (ret <= 0) {
 335                 printf("%s:%d:%zd: unhandled return in '%s'\n",
 336                         hdrfn, hdrfline, (p - protostr) + 1, protostr);
 337                 return -1;
 338         }
 339         p = sskip(p + ret);
 340
 341         if (!strncmp(p, "noreturn ", 9)) {
 342                 pp->is_noreturn = 1;
 343                 p = sskip(p + 9);
 344         }
 345
 346         if (!strchr(p, ')')) {
 347                 p = next_idt(buf, sizeof(buf), p);
 348                 p = sskip(p);
 349                 if (buf[0] == 0) {
 350                         printf("%s:%d:%zd: var name missing\n",
 351                                 hdrfn, hdrfline, (p - protostr) + 1);
 352                         return -1;
 353                 }
 354                 strcpy(pp->name, buf);
 355
 356                 p1 = strchr(p, ']');
 357                 if (p1 != NULL) {
 358                         p = p1 + 1;
 359                         pp->ret_type.is_array = 1;
 360                 }
 361                 return p - protostr;
 362         }
 363
 364         pp->is_func = 1;
 365
 366         if (*p == '(') {
 367                 pp->is_fptr = 1;
 368                 p = sskip(p + 1);
 369         }
 370
 371         p = next_word(cconv, sizeof(cconv), p);
 372         p = sskip(p);
 373         if (cconv[0] == 0) {
 374                 printf("%s:%d:%zd: cconv missing\n",
 375                         hdrfn, hdrfline, (p - protostr) + 1);
 376                 return -1;
 377         }
 378         if      (IS(cconv, "__cdecl"))
 379                 pp->is_stdcall = 0;
 380         else if (IS(cconv, "__stdcall"))
 381                 pp->is_stdcall = 1;
 382         else if (IS(cconv, "__fastcall")) {
 383                 pp->is_fastcall = 1;
 384                 pp->is_stdcall = 1; // sort of..
 385         }
 386         else if (IS(cconv, "__thiscall"))
 387                 pp->is_stdcall = 1;
 388         else if (IS(cconv, "__userpurge"))
 389                 pp->is_stdcall = 1; // IDA
 390         else if (IS(cconv, "__usercall"))
 391                 pp->is_stdcall = 0; // IDA
 392         else if (IS(cconv, "WINAPI"))
 393                 pp->is_stdcall = 1;
 394         else {
 395                 printf("%s:%d:%zd: unhandled cconv: '%s'\n",
 396                         hdrfn, hdrfline, (p - protostr) + 1, cconv);
 397                 return -1;
 398         }
 399
 400         if (pp->is_fptr) {
 401                 if (*p != '*') {
 402                         printf("%s:%d:%zd: '*' expected\n",
 403                                 hdrfn, hdrfline, (p - protostr) + 1);
 404                         return -1;
 405                 }
 406                 p++;
 407                 // XXX: skipping extra asterisks, for now
 408                 while (*p == '*')
 409                         p++;
 410                 p = sskip(p);
 411         }
 412
 413         p = next_idt(buf, sizeof(buf), p);
 414         p = sskip(p);
 415         if (buf[0] == 0) {
 416                 //printf("%s:%d:%zd: func name missing\n",
 417                 //      hdrfn, hdrfline, (p - protostr) + 1);
 418                 //return -1;
 419         }
 420         strcpy(pp->name, buf);
 421
 422         ret = get_regparm(regparm, sizeof(regparm), p);
 423         if (ret > 0) {
 424                 if (!IS(regparm, "eax") && !IS(regparm, "ax")
 425                  && !IS(regparm, "al") && !IS(regparm, "edx:eax"))
 426                 {
 427                         printf("%s:%d:%zd: bad regparm: %s\n",
 428                                 hdrfn, hdrfline, (p - protostr) + 1, regparm);
 429                         return -1;
 430                 }
 431                 p += ret;
 432                 p = sskip(p);
 433         }
 434
 435         if (pp->is_fptr) {
 436                 if (*p == '[') {
 437                         // not really ret_type is array, but ohwell
 438                         pp->ret_type.is_array = 1;
 439                         p = strchr(p + 1, ']');
 440                         if (p == NULL) {
 441                                 printf("%s:%d:%zd: ']' expected\n",
 442                                  hdrfn, hdrfline, (p - protostr) + 1);
 443                                 return -1;
 444                         }
 445                         p = sskip(p + 1);
 446                 }
 447                 if (*p != ')') {
 448                         printf("%s:%d:%zd: ')' expected\n",
 449                                 hdrfn, hdrfline, (p - protostr) + 1);
 450                         return -1;
 451                 }
 452                 p = sskip(p + 1);
 453         }
 454
 455         if (*p != '(') {
 456                 printf("%s:%d:%zd: '(' expected, got '%c'\n",
 457                                 hdrfn, hdrfline, (p - protostr) + 1, *p);
 458                 return -1;
 459         }
 460         p++;
 461
 462         // check for x(void)
 463         p = sskip(p);
 464         if ((!strncmp(p, "void", 4) || !strncmp(p, "VOID", 4))
 465            && *sskip(p + 4) == ')')
 466                 p += 4;
 467
 468         while (1) {
 469                 p = sskip(p);
 470                 if (*p == ')') {
 471                         p++;
 472                         break;
 473                 }
 474                 if (xarg > 0) {
 475                         if (*p != ',') {
 476                                 printf("%s:%d:%zd: ',' expected\n",
 477                                  hdrfn, hdrfline, (p - protostr) + 1);
 478                                 return -1;
 479                         }
 480                         p = sskip(p + 1);
 481                 }
 482
 483                 if (!strncmp(p, "...", 3)) {
 484                         pp->is_vararg = 1;
 485                         p = sskip(p + 3);
 486                         if (*p == ')') {
 487                                 p++;
 488                                 break;
 489                         }
 490                         printf("%s:%d:%zd: ')' expected\n",
 491                                 hdrfn, hdrfline, (p - protostr) + 1);
 492                         return -1;
 493                 }
 494
 495                 arg = &pp->arg[xarg];
 496                 xarg++;
 497
 498                 p1 = p;
 499                 ret = check_type(p, &arg->type);
 500                 if (ret <= 0) {
 501                         printf("%s:%d:%zd: unhandled type for arg%d\n",
 502                                 hdrfn, hdrfline, (p - protostr) + 1, xarg);
 503                         return -1;
 504                 }
 505                 p = sskip(p + ret);
 506
 507                 if (*p == '(') {
 508                         // func ptr
 509                         arg->fptr = calloc(1, sizeof(*arg->fptr));
 510                         ret = parse_protostr(p1, arg->fptr);
 511                         if (ret < 0) {
 512                                 printf("%s:%d:%zd: funcarg parse failed\n",
 513                                         hdrfn, hdrfline, p1 - protostr);
 514                                 return -1;
 515                         }
 516                         arg->fptr->is_arg = 1;
 517                         // we don't use actual names right now..
 518                         snprintf(arg->fptr->name,
 519                                 sizeof(arg->fptr->name), "a%d", xarg);
 520                         // we'll treat it as void * for non-calls
 521                         arg->type.name = strdup("void *");
 522                         arg->type.is_ptr = 1;
 523
 524                         p = p1 + ret;
 525                 }
 526
 527                 p = next_idt(buf, sizeof(buf), p);
 528                 p = sskip(p);
 529 #if 0
 530                 if (buf[0] == 0) {
 531                         printf("%s:%d:%zd: idt missing for arg%d\n",
 532                                 hdrfn, hdrfline, (p - protostr) + 1, xarg);
 533                         return -1;
 534                 }
 535 #endif
 536                 arg->reg = NULL;
 537
 538                 ret = get_regparm(regparm, sizeof(regparm), p);
 539                 if (ret > 0) {
 540                         p += ret;
 541                         p = sskip(p);
 542
 543                         arg->reg = strdup(map_reg(regparm));
 544                 }
 545
 546                 if (strstr(arg->type.name, "int64")
 547                     || IS(arg->type.name, "double"))
 548                 {
 549                         // hack..
 550                         free(arg->type.name);
 551                         arg->type.name = strdup("int");
 552                         pp_copy_arg(&pp->arg[xarg], arg);
 553                         xarg++;
 554                 }
 555
 556                 ret = check_struct_arg(arg);
 557                 if (ret > 0) {
 558                         pp->has_structarg = 1;
 559                         arg->type.is_struct = 1;
 560                         free(arg->type.name);
 561                         arg->type.name = strdup("int");
 562                         for (l = 0; l < ret; l++) {
 563                                 pp_copy_arg(&pp->arg[xarg], arg);
 564                                 xarg++;
 565                         }
 566                 }
 567         }
 568
 569         if (xarg > 0 && (IS(cconv, "__fastcall") || IS(cconv, "__thiscall"))) {
 570                 if (pp->arg[0].reg != NULL) {
 571                         printf("%s:%d: %s with arg1 spec %s?\n",
 572                                 hdrfn, hdrfline, cconv, pp->arg[0].reg);
 573                 }
 574                 pp->arg[0].reg = strdup("ecx");
 575         }
 576
 577         if (xarg > 1 && IS(cconv, "__fastcall")) {
 578                 if (pp->arg[1].reg != NULL) {
 579                         printf("%s:%d: %s with arg2 spec %s?\n",
 580                                 hdrfn, hdrfline, cconv, pp->arg[1].reg);
 581                 }
 582                 pp->arg[1].reg = strdup("edx");
 583         }
 584
 585         pp->argc = xarg;
 586
 587         for (i = 0; i < pp->argc; i++) {
 588                 if (pp->arg[i].reg == NULL)
 589                         pp->argc_stack++;
 590                 else
 591                         pp->argc_reg++;
 592         }
 593
 594         if (pp->argc == 1 && pp->arg[0].reg != NULL
 595             && IS(pp->arg[0].reg, "ecx"))
 596         {
 597                 pp->is_fastcall = 1;
 598         }
 599         else if (pp->argc_reg == 2
 600           && pp->arg[0].reg != NULL && IS(pp->arg[0].reg, "ecx")
 601           && pp->arg[1].reg != NULL && IS(pp->arg[1].reg, "edx"))
 602         {
 603                 pp->is_fastcall = 1;
 604         }
 605
 606         if (pp->is_vararg && (pp->is_stdcall || pp->is_fastcall)) {
 607                 printf("%s:%d: vararg %s?\n", hdrfn, hdrfline, cconv);
 608                 return -1;
 609         }
 610
 611         return p - protostr;
 612 }
 613
 614 static int pp_name_cmp(const void *p1, const void *p2)
 615 {
 616         const struct parsed_proto *pp1 = p1, *pp2 = p2;
 617         return strcmp(pp1->name, pp2->name);
 618 }
 619
 620 static struct parsed_proto *pp_cache;
 621 static int pp_cache_size;
 622 static int pp_cache_alloc;
 623
 624 static int b_pp_c_handler(char *proto, const char *fname)
 625 {
 626         int ret;
 627
 628         if (pp_cache_size >= pp_cache_alloc) {
 629                 pp_cache_alloc = pp_cache_alloc * 2 + 64;
 630                 pp_cache = realloc(pp_cache, pp_cache_alloc
 631                                 * sizeof(pp_cache[0]));
 632                 my_assert_not(pp_cache, NULL);
 633                 memset(pp_cache + pp_cache_size, 0,
 634                         (pp_cache_alloc - pp_cache_size)
 635                          * sizeof(pp_cache[0]));
 636         }
 637
 638         ret = parse_protostr(proto, &pp_cache[pp_cache_size]);
 639         if (ret < 0)
 640                 return -1;
 641
 642         pp_cache_size++;
 643         return 0;
 644 }
 645
 646 static void build_pp_cache(FILE *fhdr)
 647 {
 648         long pos;
 649         int ret;
 650
 651         pos = ftell(fhdr);
 652         rewind(fhdr);
 653
 654         ret = do_protostrs(fhdr, hdrfn);
 655         if (ret < 0)
 656                 exit(1);
 657
 658         qsort(pp_cache, pp_cache_size, sizeof(pp_cache[0]), pp_name_cmp);
 659         fseek(fhdr, pos, SEEK_SET);
 660 }
 661
 662 static const struct parsed_proto *proto_parse(FILE *fhdr, const char *sym,
 663         int quiet)
 664 {
 665         const struct parsed_proto *pp_ret;
 666         struct parsed_proto pp_search;
 667
 668         if (pp_cache == NULL)
 669                 build_pp_cache(fhdr);
 670
 671         if (sym[0] == '_') // && strncmp(fname, "stdc", 4) == 0)
 672                 sym++;
 673
 674         strcpy(pp_search.name, sym);
 675         pp_ret = bsearch(&pp_search, pp_cache, pp_cache_size,
 676                         sizeof(pp_cache[0]), pp_name_cmp);
 677         if (pp_ret == NULL && !quiet)
 678                 printf("%s: sym '%s' is missing\n", hdrfn, sym);
 679
 680         return pp_ret;
 681 }
 682
 683 static void pp_copy_arg(struct parsed_proto_arg *d,
 684         const struct parsed_proto_arg *s)
 685 {
 686         memcpy(d, s, sizeof(*d));
 687
 688         if (s->reg != NULL) {
 689                 d->reg = strdup(s->reg);
 690                 my_assert_not(d->reg, NULL);
 691         }
 692         if (s->type.name != NULL) {
 693                 d->type.name = strdup(s->type.name);
 694                 my_assert_not(d->type.name, NULL);
 695         }
 696         if (s->fptr != NULL) {
 697                 d->fptr = malloc(sizeof(*d->fptr));
 698                 my_assert_not(d->fptr, NULL);
 699                 memcpy(d->fptr, s->fptr, sizeof(*d->fptr));
 700         }
 701 }
 702
 703 struct parsed_proto *proto_clone(const struct parsed_proto *pp_c)
 704 {
 705         struct parsed_proto *pp;
 706         int i;
 707
 708         pp = malloc(sizeof(*pp));
 709         my_assert_not(pp, NULL);
 710         memcpy(pp, pp_c, sizeof(*pp)); // lazy..
 711
 712         // do the actual deep copy..
 713         for (i = 0; i < pp_c->argc; i++)
 714                 pp_copy_arg(&pp->arg[i], &pp_c->arg[i]);
 715         if (pp_c->ret_type.name != NULL)
 716                 pp->ret_type.name = strdup(pp_c->ret_type.name);
 717
 718         return pp;
 719 }
 720
 721 static inline void pp_print(char *buf, size_t buf_size,
 722   const struct parsed_proto *pp)
 723 {
 724   size_t l;
 725   int i;
 726
 727   snprintf(buf, buf_size, "%s %s(", pp->ret_type.name, pp->name);
 728   l = strlen(buf);
 729
 730   for (i = 0; i < pp->argc_reg; i++) {
 731     snprintf(buf + l, buf_size - l, "%s%s",
 732       i == 0 ? "" : ", ", pp->arg[i].reg);
 733     l = strlen(buf);
 734   }
 735   if (pp->argc_stack > 0) {
 736     snprintf(buf + l, buf_size - l, "%s{%d stack}",
 737       i == 0 ? "" : ", ", pp->argc_stack);
 738     l = strlen(buf);
 739   }
 740   snprintf(buf + l, buf_size - l, ")");
 741 }
 742
 743 static inline void proto_release(struct parsed_proto *pp)
 744 {
 745         int i;
 746
 747         for (i = 0; i < pp->argc; i++) {
 748                 if (pp->arg[i].reg != NULL)
 749                         free(pp->arg[i].reg);
 750                 if (pp->arg[i].type.name != NULL)
 751                         free(pp->arg[i].type.name);
 752                 if (pp->arg[i].fptr != NULL)
 753                         free(pp->arg[i].fptr);
 754         }
 755         if (pp->ret_type.name != NULL)
 756                 free(pp->ret_type.name);
 757         free(pp);
 758 }