tools/winedump/msmangle.c

   1 /*
   2  *  Demangle VC++ symbols into C function prototypes
   3  *
   4  *  Copyright 2000 Jon Griffiths
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "config.h"
  22 #include "wine/port.h"
  23
  24 #include "winedump.h"
  25
  26 /* Type for parsing mangled types */
  27 typedef struct _compound_type
  28 {
  29   char  dest_type;
  30   int   flags;
  31   int   have_qualifiers;
  32   char *expression;
  33 } compound_type;
  34
  35
  36 /* Initialise a compound type structure */
  37 #define INIT_CT(ct) do { memset (&ct, 0, sizeof (ct)); } while (0)
  38
  39 /* free the memory used by a compound structure */
  40 #define FREE_CT(ct) free (ct.expression)
  41
  42 /* Flags for data types */
  43 #define DATA_VTABLE   0x1
  44
  45 /* Internal functions */
  46 static char *demangle_datatype (char **str, compound_type *ct,
  47                                 parsed_symbol* sym);
  48
  49 static char *get_constraints_convention_1 (char **str, compound_type *ct);
  50
  51 static char *get_constraints_convention_2 (char **str, compound_type *ct);
  52
  53 static char *get_type_string (const char c, const int constraints);
  54
  55 static int   get_type_constant (const char c, const int constraints);
  56
  57 static char *get_pointer_type_string (compound_type *ct,
  58                                       const char *expression);
  59
  60
  61 /*******************************************************************
  62  *         demangle_symbol
  63  *
  64  * Demangle a C++ linker symbol into a C prototype
  65  */
  66 int symbol_demangle (parsed_symbol *sym)
  67 {
  68   compound_type ct;
  69   int is_static = 0, is_const = 0;
  70   char *function_name = NULL;
  71   char *class_name = NULL;
  72   char *name;
  73   const char *const_status;
  74   static unsigned int hash = 0; /* In case of overloaded functions */
  75   unsigned int data_flags = 0;
  76
  77   assert (globals.do_code);
  78   assert (sym && sym->symbol);
  79
  80   hash++;
  81
  82   /* MS mangled names always begin with '?' */
  83   name = sym->symbol;
  84   if (*name++ != '?')
  85     return -1;
  86
  87   if (VERBOSE)
  88     puts ("Attempting to demangle symbol");
  89
  90   /* Then function name or operator code */
  91   if (*name == '?')
  92   {
  93     /* C++ operator code (one character, or two if the first is '_') */
  94     switch (*++name)
  95     {
  96     case '0': function_name = strdup ("ctor"); break;
  97     case '1': function_name = strdup ("dtor"); break;
  98     case '2': function_name = strdup ("operator_new"); break;
  99     case '3': function_name = strdup ("operator_delete"); break;
 100     case '4': function_name = strdup ("operator_equals"); break;
 101     case '5': function_name = strdup ("operator_shiftright"); break;
 102     case '6': function_name = strdup ("operator_shiftleft"); break;
 103     case '7': function_name = strdup ("operator_not"); break;
 104     case '8': function_name = strdup ("operator_equalsequals"); break;
 105     case '9': function_name = strdup ("operator_notequals"); break;
 106     case 'A': function_name = strdup ("operator_array"); break;
 107     case 'C': function_name = strdup ("operator_dereference"); break;
 108     case 'D': function_name = strdup ("operator_multiply"); break;
 109     case 'E': function_name = strdup ("operator_plusplus"); break;
 110     case 'F': function_name = strdup ("operator_minusminus"); break;
 111     case 'G': function_name = strdup ("operator_minus"); break;
 112     case 'H': function_name = strdup ("operator_plus"); break;
 113     case 'I': function_name = strdup ("operator_address"); break;
 114     case 'J': function_name = strdup ("operator_dereferencememberptr"); break;
 115     case 'K': function_name = strdup ("operator_divide"); break;
 116     case 'L': function_name = strdup ("operator_modulo"); break;
 117     case 'M': function_name = strdup ("operator_lessthan"); break;
 118     case 'N': function_name = strdup ("operator_lessthanequal"); break;
 119     case 'O': function_name = strdup ("operator_greaterthan"); break;
 120     case 'P': function_name = strdup ("operator_greaterthanequal"); break;
 121     case 'Q': function_name = strdup ("operator_comma"); break;
 122     case 'R': function_name = strdup ("operator_functioncall"); break;
 123     case 'S': function_name = strdup ("operator_complement"); break;
 124     case 'T': function_name = strdup ("operator_xor"); break;
 125     case 'U': function_name = strdup ("operator_logicalor"); break;
 126     case 'V': function_name = strdup ("operator_logicaland"); break;
 127     case 'W': function_name = strdup ("operator_or"); break;
 128     case 'X': function_name = strdup ("operator_multiplyequals"); break;
 129     case 'Y': function_name = strdup ("operator_plusequals"); break;
 130     case 'Z': function_name = strdup ("operator_minusequals"); break;
 131     case '_':
 132       switch (*++name)
 133       {
 134       case '0': function_name = strdup ("operator_divideequals"); break;
 135       case '1': function_name = strdup ("operator_moduloequals"); break;
 136       case '2': function_name = strdup ("operator_shiftrightequals"); break;
 137       case '3': function_name = strdup ("operator_shiftleftequals"); break;
 138       case '4': function_name = strdup ("operator_andequals"); break;
 139       case '5': function_name = strdup ("operator_orequals"); break;
 140       case '6': function_name = strdup ("operator_xorequals"); break;
 141       case '7': function_name = strdup ("vftable"); data_flags = DATA_VTABLE; break;
 142       case '8': function_name = strdup ("vbtable"); data_flags = DATA_VTABLE; break;
 143       case '9': function_name = strdup ("vcall"); data_flags = DATA_VTABLE; break;
 144       case 'A': function_name = strdup ("typeof"); data_flags = DATA_VTABLE; break;
 145       case 'B': function_name = strdup ("local_static_guard"); data_flags = DATA_VTABLE; break;
 146       case 'C': function_name = strdup ("string"); data_flags = DATA_VTABLE; break;
 147       case 'D': function_name = strdup ("vbase_dtor"); data_flags = DATA_VTABLE; break;
 148       case 'E': function_name = strdup ("vector_dtor"); break;
 149       case 'G': function_name = strdup ("scalar_dtor"); break;
 150       case 'H': function_name = strdup ("vector_ctor_iter"); break;
 151       case 'I': function_name = strdup ("vector_dtor_iter"); break;
 152       case 'J': function_name = strdup ("vector_vbase_ctor_iter"); break;
 153       case 'L': function_name = strdup ("eh_vector_ctor_iter"); break;
 154       case 'M': function_name = strdup ("eh_vector_dtor_iter"); break;
 155       case 'N': function_name = strdup ("eh_vector_vbase_ctor_iter"); break;
 156       case 'O': function_name = strdup ("copy_ctor_closure"); break;
 157       case 'S': function_name = strdup ("local_vftable"); data_flags = DATA_VTABLE; break;
 158       case 'T': function_name = strdup ("local_vftable_ctor_closure"); break;
 159       case 'U': function_name = strdup ("operator_new_vector"); break;
 160       case 'V': function_name = strdup ("operator_delete_vector"); break;
 161       case 'X': function_name = strdup ("placement_new_closure"); break;
 162       case 'Y': function_name = strdup ("placement_delete_closure"); break;
 163       default:
 164         return -1;
 165       }
 166       break;
 167     default:
 168       /* FIXME: Other operators */
 169       return -1;
 170     }
 171     name++;
 172   }
 173   else
 174   {
 175     /* Type or function name terminated by '@' */
 176     function_name = name;
 177     while (*name && *name++ != '@') ;
 178     if (!*name)
 179       return -1;
 180     function_name = str_substring (function_name, name - 1);
 181   }
 182
 183   /* Either a class name, or '@' if the symbol is not a class member */
 184   if (*name == '@')
 185   {
 186     class_name = strdup ("global"); /* Non member function (or a datatype) */
 187     name++;
 188   }
 189   else
 190   {
 191     /* Class the function is associated with, terminated by '@@' */
 192     class_name = name;
 193     while (*name && *name++ != '@') ;
 194     if (*name++ != '@') {
 195       free (function_name);
 196       return -1;
 197     }
 198     class_name = str_substring (class_name, name - 2); /* Allocates a new string */
 199   }
 200
 201   /* Function/Data type and access level */
 202   /* FIXME: why 2 possible letters for each option? */
 203   switch(*name++)
 204   {
 205   /* Data */
 206
 207   case '0' : /* private static */
 208   case '1' : /* protected static */
 209   case '2' : /* public static */
 210     is_static = 1;
 211     /* Fall through */
 212   case '3' : /* non static */
 213   case '4' : /* non static */
 214     /* Data members need to be implemented: report */
 215     INIT_CT (ct);
 216     if (!demangle_datatype (&name, &ct, sym))
 217     {
 218       if (VERBOSE)
 219         printf ("/*FIXME: %s: unknown data*/\n", sym->symbol);
 220       free (function_name);
 221       free (class_name);
 222       return -1;
 223     }
 224     sym->flags |= SYM_DATA;
 225     sym->argc = 1;
 226     sym->arg_name[0] = str_create (5, OUTPUT_UC_DLL_NAME, "_", class_name,
 227                                   is_static ? "static_" : "_", function_name);
 228     sym->arg_text[0] = str_create (3, ct.expression, " ", sym->arg_name[0]);
 229     FREE_CT (ct);
 230     free (function_name);
 231     free (class_name);
 232     return 0;
 233
 234   case '6' : /* compiler generated static */
 235   case '7' : /* compiler generated static */
 236     if (data_flags & DATA_VTABLE)
 237     {
 238       sym->flags |= SYM_DATA;
 239       sym->argc = 1;
 240       sym->arg_name[0] = str_create (5, OUTPUT_UC_DLL_NAME, "_", class_name,
 241                                      "_", function_name);
 242       sym->arg_text[0] = str_create (2, "void *", sym->arg_name[0]);
 243
 244       if (VERBOSE)
 245         puts ("Demangled symbol OK [vtable]");
 246       free (function_name);
 247       free (class_name);
 248       return 0;
 249     }
 250     free (function_name);
 251     free (class_name);
 252     return -1;
 253
 254   /* Functions */
 255
 256   case 'E' : /* private virtual */
 257   case 'F' : /* private virtual */
 258   case 'M' : /* protected virtual */
 259   case 'N' : /* protected virtual */
 260   case 'U' : /* public virtual */
 261   case 'V' : /* public virtual */
 262     /* Virtual functions need to be added to the exported vtable: report */
 263     if (VERBOSE)
 264       printf ("/*FIXME %s: %s::%s is virtual-add to vftable*/\n", sym->symbol,
 265               class_name, function_name);
 266     /* Fall through */
 267   case 'A' : /* private */
 268   case 'B' : /* private */
 269   case 'I' : /* protected */
 270   case 'J' : /* protected */
 271   case 'Q' : /* public */
 272   case 'R' : /* public */
 273     /* Implicit 'this' pointer */
 274     sym->arg_text [sym->argc] = str_create (3, "struct ", class_name, " *");
 275     sym->arg_type [sym->argc] = ARG_POINTER;
 276     sym->arg_flag [sym->argc] = 0;
 277     sym->arg_name [sym->argc++] = strdup ("_this");
 278     /* New struct definitions can be 'grep'ed out for making a fixup header */
 279     if (VERBOSE)
 280       printf ("struct %s { void **vtable; /*FIXME: class definition */ };\n", class_name);
 281     break;
 282   case 'C' : /* private: static */
 283   case 'D' : /* private: static */
 284   case 'K' : /* protected: static */
 285   case 'L' : /* protected: static */
 286   case 'S' : /* public: static */
 287   case 'T' : /* public: static */
 288     is_static = 1; /* No implicit this pointer */
 289     break;
 290   case 'Y' :
 291   case 'Z' :
 292     break;
 293   /* FIXME: G,H / O,P / W,X are private / protected / public thunks */
 294   default:
 295     free (function_name);
 296     free (class_name);
 297     return -1;
 298   }
 299
 300   /* If there is an implicit this pointer, const status follows */
 301   if (sym->argc)
 302   {
 303    switch (*name++)
 304    {
 305    case 'A': break; /* non-const */
 306    case 'B': is_const = CT_CONST; break;
 307    case 'C': is_const = CT_VOLATILE; break;
 308    case 'D': is_const = (CT_CONST | CT_VOLATILE); break;
 309    default:
 310     free (function_name);
 311     free (class_name);
 312      return -1;
 313    }
 314   }
 315
 316   /* Next is the calling convention */
 317   switch (*name++)
 318   {
 319   case 'A': /* __cdecl */
 320   case 'B': /* __cdecl __declspec(dllexport) */
 321     if (!sym->argc)
 322     {
 323       sym->flags |= SYM_CDECL;
 324       break;
 325     }
 326     /* Else fall through */
 327   case 'C': /* __pascal */
 328   case 'D': /* __pascal __declspec(dllexport) */
 329   case 'E': /* __thiscall */
 330   case 'F': /* __thiscall __declspec(dllexport) */
 331   case 'G': /* __stdcall */
 332   case 'H': /* __stdcall __declspec(dllexport) */
 333   case 'I': /* __fastcall */
 334   case 'J': /* __fastcall __declspec(dllexport)*/
 335   case 'K': /* default (none given) */
 336     if (sym->argc)
 337       sym->flags |= SYM_THISCALL;
 338     else
 339       sym->flags |= SYM_STDCALL;
 340     break;
 341   default:
 342     free (function_name);
 343     free (class_name);
 344     return -1;
 345   }
 346
 347   /* Return type, or @ if 'void' */
 348   if (*name == '@')
 349   {
 350     sym->return_text = strdup ("void");
 351     sym->return_type = ARG_VOID;
 352     name++;
 353   }
 354   else
 355   {
 356     INIT_CT (ct);
 357     if (!demangle_datatype (&name, &ct, sym)) {
 358       free (function_name);
 359       free (class_name);
 360       return -1;
 361     }
 362     sym->return_text = ct.expression;
 363     sym->return_type = get_type_constant(ct.dest_type, ct.flags);
 364     ct.expression = NULL;
 365     FREE_CT (ct);
 366   }
 367
 368   /* Now come the function arguments */
 369   while (*name && *name != 'Z')
 370   {
 371     /* Decode each data type and append it to the argument list */
 372     if (*name != '@')
 373     {
 374       INIT_CT (ct);
 375       if (!demangle_datatype(&name, &ct, sym)) {
 376         free (function_name);
 377         free (class_name);
 378         return -1;
 379       }
 380
 381       if (strcmp (ct.expression, "void"))
 382       {
 383         sym->arg_text [sym->argc] = ct.expression;
 384         ct.expression = NULL;
 385         sym->arg_type [sym->argc] = get_type_constant (ct.dest_type, ct.flags);
 386         sym->arg_flag [sym->argc] = ct.flags;
 387         sym->arg_name[sym->argc] = str_create_num (1, sym->argc, "arg");
 388         sym->argc++;
 389       }
 390       else
 391         break; /* 'void' terminates an argument list */
 392       FREE_CT (ct);
 393     }
 394     else
 395       name++;
 396   }
 397
 398   while (*name == '@')
 399     name++;
 400
 401   /* Functions are always terminated by 'Z'. If we made it this far and
 402    * Don't find it, we have incorrectly identified a data type.
 403    */
 404   if (*name != 'Z') {
 405     free (function_name);
 406     free (class_name);
 407     return -1;
 408   }
 409
 410   /* Note: '()' after 'Z' means 'throws', but we don't care here */
 411
 412   /* Create the function name. Include a unique number because otherwise
 413    * overloaded functions could have the same c signature.
 414    */
 415   switch (is_const)
 416   {
 417   case (CT_CONST | CT_VOLATILE): const_status = "_const_volatile"; break;
 418   case CT_CONST: const_status = "_const"; break;
 419   case CT_VOLATILE: const_status = "_volatile"; break;
 420   default: const_status = "_"; break;
 421   }
 422   sym->function_name = str_create_num (4, hash, class_name, "_",
 423        function_name, is_static ? "_static" : const_status);
 424
 425   assert (sym->return_text);
 426   assert (sym->flags);
 427   assert (sym->function_name);
 428
 429   free (class_name);
 430   free (function_name);
 431
 432   if (VERBOSE)
 433     puts ("Demangled symbol OK");
 434
 435   return 0;
 436 }
 437
 438
 439 /*******************************************************************
 440  *         demangle_datatype
 441  *
 442  * Attempt to demangle a C++ data type, which may be compound.
 443  * a compound type is made up of a number of simple types. e.g:
 444  * char** = (pointer to (pointer to (char)))
 445  *
 446  * Uses a simple recursive descent algorithm that is broken
 447  * and/or incomplete, without a doubt ;-)
 448  */
 449 static char *demangle_datatype (char **str, compound_type *ct,
 450                                 parsed_symbol* sym)
 451 {
 452   char *iter;
 453
 454   assert (str && *str);
 455   assert (ct);
 456
 457   iter = *str;
 458
 459   if (!get_constraints_convention_1 (&iter, ct))
 460     return NULL;
 461
 462   if (*iter == '_')
 463   {
 464     /* MS type: __int8,__int16 etc */
 465     ct->flags |= CT_EXTENDED;
 466     iter++;
 467   }
 468
 469   switch (*iter)
 470   {
 471     case 'C': case 'D': case 'E': case 'F': case 'G':
 472     case 'H': case 'I': case 'J': case 'K': case 'M':
 473     case 'N': case 'O': case 'X': case 'Z':
 474       /* Simple data types */
 475       ct->dest_type = *iter++;
 476       if (!get_constraints_convention_2 (&iter, ct))
 477         return NULL;
 478       ct->expression = get_type_string (ct->dest_type, ct->flags);
 479       break;
 480     case 'U':
 481     case 'V':
 482       /* Class/struct/union */
 483       ct->dest_type = *iter++;
 484       if (*iter == '0' || *iter == '1')
 485       {
 486         /* Referring to class type (implicit 'this') */
 487         char *stripped;
 488         if (!sym->argc)
 489           return NULL;
 490
 491         iter++;
 492         /* Apply our constraints to the base type (struct xxx *) */
 493         stripped = strdup (sym->arg_text [0]);
 494         if (!stripped)
 495           fatal ("Out of Memory");
 496
 497         /* If we're a reference, re-use the pointer already in the type */
 498         if (!(ct->flags & CT_BY_REFERENCE))
 499           stripped[ strlen (stripped) - 2] = '\0'; /* otherwise, strip it */
 500
 501         ct->expression = str_create (2, ct->flags & CT_CONST ? "const " :
 502                          ct->flags & CT_VOLATILE ? "volatile " : "", stripped);
 503         free (stripped);
 504       }
 505       else if (*iter != '@')
 506       {
 507         /* The name of the class/struct, followed by '@@' */
 508         char *struct_name = iter;
 509         while (*iter && *iter++ != '@') ;
 510         if (*iter++ != '@')
 511           return NULL;
 512         struct_name = str_substring (struct_name, iter - 2);
 513         ct->expression = str_create (4, ct->flags & CT_CONST ? "const " :
 514                          ct->flags & CT_VOLATILE ? "volatile " : "", "struct ",
 515                          struct_name, ct->flags & CT_BY_REFERENCE ? " *" : "");
 516         free (struct_name);
 517       }
 518       break;
 519     case 'Q': /* FIXME: Array Just treated as pointer currently  */
 520     case 'P': /* Pointer */
 521       {
 522         compound_type sub_ct;
 523         INIT_CT (sub_ct);
 524
 525         ct->dest_type = *iter++;
 526         if (!get_constraints_convention_2 (&iter, ct))
 527           return NULL;
 528
 529         /* FIXME: P6 = Function pointer, others who knows.. */
 530         if (isdigit (*iter))
 531         {
 532           if (*iter == '6')
 533           {
 534               int sub_expressions = 0;
 535               /* FIXME: there are a tons of memory leaks here */
 536               /* FIXME: this is still broken in some cases and it has to be
 537                * merged with the function prototype parsing above...
 538                */
 539               iter += iter[1] == 'A' ? 2 : 3; /* FIXME */
 540               if (!demangle_datatype (&iter, &sub_ct, sym))
 541                   return NULL;
 542               ct->expression = str_create(2, sub_ct.expression, " (*)(");
 543               if (*iter != '@')
 544               {
 545                   while (*iter != 'Z')
 546                   {
 547                       FREE_CT (sub_ct);
 548                       INIT_CT (sub_ct);
 549                       if (!demangle_datatype (&iter, &sub_ct, sym))
 550                           return NULL;
 551                       if (sub_expressions)
 552                               ct->expression = str_create(3, ct->expression, ", ", sub_ct.expression);
 553                       else
 554                               ct->expression = str_create(2, ct->expression, sub_ct.expression);
 555                       while (*iter == '@') iter++;
 556                       sub_expressions++;
 557                   }
 558               } else while (*iter == '@') iter++;
 559               iter++;
 560               ct->expression = str_create(2, ct->expression, ")");
 561           }
 562           else
 563               return NULL;
 564         }
 565         else
 566         {
 567             /* Recurse to get the pointed-to type */
 568             if (!demangle_datatype (&iter, &sub_ct, sym))
 569                 return NULL;
 570
 571             ct->expression = get_pointer_type_string (ct, sub_ct.expression);
 572         }
 573
 574         FREE_CT (sub_ct);
 575       }
 576       break;
 577     case '0': case '1': case '2': case '3': case '4':
 578     case '5': case '6': case '7': case '8': case '9':
 579       /* Referring back to previously parsed type */
 580       if (sym->argc >= (size_t)('0' - *iter))
 581         return NULL;
 582       ct->dest_type = sym->arg_type ['0' - *iter];
 583       ct->expression = strdup (sym->arg_text ['0' - *iter]);
 584       iter++;
 585       break;
 586     default :
 587       return NULL;
 588   }
 589   if (!ct->expression)
 590     return NULL;
 591
 592   return (char *)(*str = iter);
 593 }
 594
 595
 596 /* Constraints:
 597  * There are two conventions for specifying data type constants. I
 598  * don't know how the compiler chooses between them, but I suspect it
 599  * is based on ensuring that linker names are unique.
 600  * Convention 1. The data type modifier is given first, followed
 601  *   by the data type it operates on. '?' means passed by value,
 602  *   'A' means passed by reference. Note neither of these characters
 603  *   is a valid base data type. This is then followed by a character
 604  *   specifying constness or volatility.
 605  * Convention 2. The base data type (which is never '?' or 'A') is
 606  *   given first. The character modifier is optionally given after
 607  *   the base type character. If a valid character modifier is present,
 608  *   then it only applies to the current data type if the character
 609  *   after that is not 'A' 'B' or 'C' (Because this makes a convention 1
 610  *   constraint for the next data type).
 611  *
 612  * The conventions are usually mixed within the same symbol.
 613  * Since 'C' is both a qualifier and a data type, I suspect that
 614  * convention 1 allows specifying e.g. 'volatile signed char*'. In
 615  * convention 2 this would be 'CC' which is ambiguous (i.e. Is it two
 616  * pointers, or a single pointer + modifier?). In convention 1 it
 617  * is encoded as '?CC' which is not ambiguous. This probably
 618  * holds true for some other types as well.
 619  */
 620
 621 /*******************************************************************
 622  *         get_constraints_convention_1
 623  *
 624  * Get type constraint information for a data type
 625  */
 626 static char *get_constraints_convention_1 (char **str, compound_type *ct)
 627 {
 628   char *iter = *str, **retval = str;
 629
 630   if (ct->have_qualifiers)
 631     return (char *)*str; /* Previously got constraints for this type */
 632
 633   if (*iter == '?' || *iter == 'A')
 634   {
 635     ct->have_qualifiers = 1;
 636     ct->flags |= (*iter++ == '?' ? 0 : CT_BY_REFERENCE);
 637
 638     switch (*iter++)
 639     {
 640     case 'A' :
 641       break; /* non-const, non-volatile */
 642     case 'B' :
 643       ct->flags |= CT_CONST;
 644       break;
 645     case 'C' :
 646       ct->flags |= CT_VOLATILE;
 647       break;
 648     default  :
 649       return NULL;
 650     }
 651   }
 652
 653   return (char *)(*retval = iter);
 654 }
 655
 656
 657 /*******************************************************************
 658  *         get_constraints_convention_2
 659  *
 660  * Get type constraint information for a data type
 661  */
 662 static char *get_constraints_convention_2 (char **str, compound_type *ct)
 663 {
 664   char *iter = *str, **retval = str;
 665
 666   /* FIXME: Why do arrays have both convention 1 & 2 constraints? */
 667   if (ct->have_qualifiers && ct->dest_type != 'Q')
 668     return (char *)*str; /* Previously got constraints for this type */
 669
 670   ct->have_qualifiers = 1; /* Even if none, we've got all we're getting */
 671
 672   switch (*iter)
 673   {
 674   case 'A' :
 675     if (iter[1] != 'A' && iter[1] != 'B' && iter[1] != 'C')
 676       iter++;
 677     break;
 678   case 'B' :
 679     ct->flags |= CT_CONST;
 680     iter++;
 681     break;
 682   case 'C' :
 683     /* See note above, if we find 'C' it is _not_ a signed char */
 684     ct->flags |= CT_VOLATILE;
 685     iter++;
 686     break;
 687   }
 688
 689   return (char *)(*retval = iter);
 690 }
 691
 692
 693 /*******************************************************************
 694  *         get_type_string
 695  *
 696  * Return a string containing the name of a data type
 697  */
 698 static char *get_type_string (const char c, const int constraints)
 699 {
 700   const char *type_string;
 701
 702   if (constraints & CT_EXTENDED)
 703   {
 704     switch (c)
 705     {
 706     case 'D': type_string = "__int8"; break;
 707     case 'E': type_string = "unsigned __int8"; break;
 708     case 'F': type_string = "__int16"; break;
 709     case 'G': type_string = "unsigned __int16"; break;
 710     case 'H': type_string = "__int32"; break;
 711     case 'I': type_string = "unsigned __int32"; break;
 712     case 'J': type_string = "__int64"; break;
 713     case 'K': type_string = "unsigned __int64"; break;
 714     case 'L': type_string = "__int128"; break;
 715     case 'M': type_string = "unsigned __int128"; break;
 716     case 'N': type_string = "int"; break; /* bool */
 717     case 'W': type_string = "WCHAR"; break; /* wchar_t */
 718     default:
 719       return NULL;
 720    }
 721   }
 722   else
 723   {
 724     switch (c)
 725     {
 726     case 'C': /* Signed char, fall through */
 727     case 'D': type_string = "char"; break;
 728     case 'E': type_string = "unsigned char"; break;
 729     case 'F': type_string = "short int"; break;
 730     case 'G': type_string = "unsigned short int"; break;
 731     case 'H': type_string = "int"; break;
 732     case 'I': type_string = "unsigned int"; break;
 733     case 'J': type_string = "long"; break;
 734     case 'K': type_string = "unsigned long"; break;
 735     case 'M': type_string = "float"; break;
 736     case 'N': type_string = "double"; break;
 737     case 'O': type_string = "long double"; break;
 738     /* FIXME: T = union */
 739     case 'U':
 740     case 'V': type_string = "struct"; break;
 741     case 'X': return strdup ("void");
 742     case 'Z': return strdup ("...");
 743     default:
 744       return NULL;
 745    }
 746   }
 747
 748   return str_create (3, constraints & CT_CONST ? "const " :
 749                      constraints & CT_VOLATILE ? "volatile " : "", type_string,
 750                      constraints & CT_BY_REFERENCE ? " *" : "");
 751 }
 752
 753
 754 /*******************************************************************
 755  *         get_type_constant
 756  *
 757  * Get the ARG_* constant for this data type
 758  */
 759 static int get_type_constant (const char c, const int constraints)
 760 {
 761   /* Any reference type is really a pointer */
 762   if (constraints & CT_BY_REFERENCE)
 763      return ARG_POINTER;
 764
 765   switch (c)
 766   {
 767   case 'C': case 'D': case 'E': case 'F': case 'G': case 'H': case 'I':
 768   case 'J': case 'K':
 769     return ARG_LONG;
 770   case 'M':
 771     return ARG_FLOAT;
 772   case 'N': case 'O':
 773     return ARG_DOUBLE;
 774   case 'P': case 'Q':
 775     return ARG_POINTER;
 776   case 'U': case 'V':
 777     return ARG_STRUCT;
 778   case 'X':
 779     return ARG_VOID;
 780   case 'Z':
 781   default:
 782     return -1;
 783   }
 784 }
 785
 786
 787 /*******************************************************************
 788  *         get_pointer_type_string
 789  *
 790  * Return a string containing 'pointer to expression'
 791  */
 792 static char *get_pointer_type_string (compound_type *ct,
 793                                       const char *expression)
 794 {
 795   /* FIXME: set a compound flag for bracketing expression if needed */
 796   return str_create (3, ct->flags & CT_CONST ? "const " :
 797                      ct->flags & CT_VOLATILE ? "volatile " : "", expression,
 798                      ct->flags & CT_BY_REFERENCE ? " **" : " *");
 799
 800 }