nsz Git - cparser/blob - ast.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2008 Matthias Braun <matze@braunis.de>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  18  * 02111-1307, USA.
  19  */
  20 #include <config.h>
  21
  22 #include "ast_t.h"
  23 #include "symbol_t.h"
  24 #include "type_t.h"
  25 #include "parser.h"
  26 #include "lang_features.h"
  27 #include "entity_t.h"
  28
  29 #include <assert.h>
  30 #include <stdio.h>
  31 #include <stdlib.h>
  32 #include <ctype.h>
  33
  34 #ifdef __INTEL_COMPILER
  35 #include <mathimf.h>
  36 #else
  37 #include <math.h>
  38 #endif
  39
  40 #include "adt/error.h"
  41
  42 struct obstack ast_obstack;
  43
  44 static FILE *out;
  45 static int   indent;
  46
  47 /** If set, implicit casts are printed. */
  48 bool print_implicit_casts = false;
  49
  50 /** If set parenthesis are printed to indicate operator precedence. */
  51 bool print_parenthesis = false;
  52
  53 static void print_statement(const statement_t *statement);
  54 static void print_expression_prec(const expression_t *expression, unsigned prec);
  55
  56 void change_indent(int delta)
  57 {
  58         indent += delta;
  59         assert(indent >= 0);
  60 }
  61
  62 void print_indent(void)
  63 {
  64         for (int i = 0; i < indent; ++i)
  65                 fputc('\t', out);
  66 }
  67
  68 /**
  69  * Returns 1 if a given precedence level has right-to-left
  70  * associativity, else 0.
  71  *
  72  * @param precedence   the operator precedence
  73  */
  74 static int right_to_left(unsigned precedence)
  75 {
  76         switch (precedence) {
  77                 case 2*PREC_ASSIGNMENT:
  78                 case 2*PREC_CONDITIONAL:
  79                 case 2*PREC_UNARY:
  80                         return 1;
  81
  82                 default:
  83                         return 0;
  84         }
  85 }
  86
  87 /**
  88  * Return the precedence of an expression given by its kind.
  89  *
  90  * @param kind   the expression kind
  91  */
  92 static unsigned get_expression_precedence(expression_kind_t kind)
  93 {
  94         static const unsigned prec[] = {
  95                 [EXPR_UNKNOWN]                   = PREC_PRIMARY,
  96                 [EXPR_INVALID]                   = PREC_PRIMARY,
  97                 [EXPR_REFERENCE]                 = PREC_PRIMARY,
  98                 [EXPR_REFERENCE_ENUM_VALUE]      = PREC_PRIMARY,
  99                 [EXPR_CHARACTER_CONSTANT]        = PREC_PRIMARY,
 100                 [EXPR_WIDE_CHARACTER_CONSTANT]   = PREC_PRIMARY,
 101                 [EXPR_CONST]                     = PREC_PRIMARY,
 102                 [EXPR_STRING_LITERAL]            = PREC_PRIMARY,
 103                 [EXPR_WIDE_STRING_LITERAL]       = PREC_PRIMARY,
 104                 [EXPR_COMPOUND_LITERAL]          = PREC_UNARY,
 105                 [EXPR_CALL]                      = PREC_POSTFIX,
 106                 [EXPR_CONDITIONAL]               = PREC_CONDITIONAL,
 107                 [EXPR_SELECT]                    = PREC_POSTFIX,
 108                 [EXPR_ARRAY_ACCESS]              = PREC_POSTFIX,
 109                 [EXPR_SIZEOF]                    = PREC_UNARY,
 110                 [EXPR_CLASSIFY_TYPE]             = PREC_UNARY,
 111                 [EXPR_ALIGNOF]                   = PREC_UNARY,
 112
 113                 [EXPR_FUNCNAME]                  = PREC_PRIMARY,
 114                 [EXPR_BUILTIN_SYMBOL]            = PREC_PRIMARY,
 115                 [EXPR_BUILTIN_CONSTANT_P]        = PREC_PRIMARY,
 116                 [EXPR_BUILTIN_PREFETCH]          = PREC_PRIMARY,
 117                 [EXPR_OFFSETOF]                  = PREC_PRIMARY,
 118                 [EXPR_VA_START]                  = PREC_PRIMARY,
 119                 [EXPR_VA_ARG]                    = PREC_PRIMARY,
 120                 [EXPR_STATEMENT]                 = PREC_PRIMARY,
 121                 [EXPR_LABEL_ADDRESS]             = PREC_PRIMARY,
 122
 123                 [EXPR_UNARY_NEGATE]              = PREC_UNARY,
 124                 [EXPR_UNARY_PLUS]                = PREC_UNARY,
 125                 [EXPR_UNARY_BITWISE_NEGATE]      = PREC_UNARY,
 126                 [EXPR_UNARY_NOT]                 = PREC_UNARY,
 127                 [EXPR_UNARY_DEREFERENCE]         = PREC_UNARY,
 128                 [EXPR_UNARY_TAKE_ADDRESS]        = PREC_UNARY,
 129                 [EXPR_UNARY_POSTFIX_INCREMENT]   = PREC_UNARY,
 130                 [EXPR_UNARY_POSTFIX_DECREMENT]   = PREC_UNARY,
 131                 [EXPR_UNARY_PREFIX_INCREMENT]    = PREC_UNARY,
 132                 [EXPR_UNARY_PREFIX_DECREMENT]    = PREC_UNARY,
 133                 [EXPR_UNARY_CAST]                = PREC_UNARY,
 134                 [EXPR_UNARY_CAST_IMPLICIT]       = PREC_UNARY,
 135                 [EXPR_UNARY_ASSUME]              = PREC_PRIMARY,
 136                 [EXPR_UNARY_DELETE]              = PREC_UNARY,
 137                 [EXPR_UNARY_DELETE_ARRAY]        = PREC_UNARY,
 138                 [EXPR_UNARY_THROW]               = PREC_ASSIGNMENT,
 139
 140                 [EXPR_BINARY_ADD]                = PREC_ADDITIVE,
 141                 [EXPR_BINARY_SUB]                = PREC_ADDITIVE,
 142                 [EXPR_BINARY_MUL]                = PREC_MULTIPLICATIVE,
 143                 [EXPR_BINARY_DIV]                = PREC_MULTIPLICATIVE,
 144                 [EXPR_BINARY_MOD]                = PREC_MULTIPLICATIVE,
 145                 [EXPR_BINARY_EQUAL]              = PREC_EQUALITY,
 146                 [EXPR_BINARY_NOTEQUAL]           = PREC_EQUALITY,
 147                 [EXPR_BINARY_LESS]               = PREC_RELATIONAL,
 148                 [EXPR_BINARY_LESSEQUAL]          = PREC_RELATIONAL,
 149                 [EXPR_BINARY_GREATER]            = PREC_RELATIONAL,
 150                 [EXPR_BINARY_GREATEREQUAL]       = PREC_RELATIONAL,
 151                 [EXPR_BINARY_BITWISE_AND]        = PREC_AND,
 152                 [EXPR_BINARY_BITWISE_OR]         = PREC_OR,
 153                 [EXPR_BINARY_BITWISE_XOR]        = PREC_XOR,
 154                 [EXPR_BINARY_LOGICAL_AND]        = PREC_LOGICAL_AND,
 155                 [EXPR_BINARY_LOGICAL_OR]         = PREC_LOGICAL_OR,
 156                 [EXPR_BINARY_SHIFTLEFT]          = PREC_SHIFT,
 157                 [EXPR_BINARY_SHIFTRIGHT]         = PREC_SHIFT,
 158                 [EXPR_BINARY_ASSIGN]             = PREC_ASSIGNMENT,
 159                 [EXPR_BINARY_MUL_ASSIGN]         = PREC_ASSIGNMENT,
 160                 [EXPR_BINARY_DIV_ASSIGN]         = PREC_ASSIGNMENT,
 161                 [EXPR_BINARY_MOD_ASSIGN]         = PREC_ASSIGNMENT,
 162                 [EXPR_BINARY_ADD_ASSIGN]         = PREC_ASSIGNMENT,
 163                 [EXPR_BINARY_SUB_ASSIGN]         = PREC_ASSIGNMENT,
 164                 [EXPR_BINARY_SHIFTLEFT_ASSIGN]   = PREC_ASSIGNMENT,
 165                 [EXPR_BINARY_SHIFTRIGHT_ASSIGN]  = PREC_ASSIGNMENT,
 166                 [EXPR_BINARY_BITWISE_AND_ASSIGN] = PREC_ASSIGNMENT,
 167                 [EXPR_BINARY_BITWISE_XOR_ASSIGN] = PREC_ASSIGNMENT,
 168                 [EXPR_BINARY_BITWISE_OR_ASSIGN]  = PREC_ASSIGNMENT,
 169                 [EXPR_BINARY_COMMA]              = PREC_EXPRESSION,
 170
 171                 [EXPR_BINARY_BUILTIN_EXPECT]     = PREC_PRIMARY,
 172                 [EXPR_BINARY_ISGREATER]          = PREC_PRIMARY,
 173                 [EXPR_BINARY_ISGREATEREQUAL]     = PREC_PRIMARY,
 174                 [EXPR_BINARY_ISLESS]             = PREC_PRIMARY,
 175                 [EXPR_BINARY_ISLESSEQUAL]        = PREC_PRIMARY,
 176                 [EXPR_BINARY_ISLESSGREATER]      = PREC_PRIMARY,
 177                 [EXPR_BINARY_ISUNORDERED]        = PREC_PRIMARY
 178         };
 179         assert((unsigned)kind < (sizeof(prec)/sizeof(prec[0])));
 180         unsigned res = prec[kind];
 181
 182         assert(res != PREC_BOTTOM);
 183         /* we need the lowest bit for right-to-left precedence */
 184         return 2 * res;
 185 }
 186
 187 /**
 188  * Print a constant expression.
 189  *
 190  * @param cnst  the constant expression
 191  */
 192 static void print_const(const const_expression_t *cnst)
 193 {
 194         if(cnst->base.type == NULL)
 195                 return;
 196
 197         const type_t *const type = skip_typeref(cnst->base.type);
 198
 199         if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
 200                 fputs(cnst->v.int_value ? "true" : "false", out);
 201         } else if (is_type_integer(type)) {
 202                 fprintf(out, "%lld", cnst->v.int_value);
 203         } else if (is_type_float(type)) {
 204                 long double const val = cnst->v.float_value;
 205 #ifdef _WIN32
 206                 /* ARG, no way to print long double */
 207                 fprintf(out, "%.20g", (double)val);
 208 #else
 209                 fprintf(out, "%.20Lg", val);
 210 #endif
 211                 if (isfinite(val) && truncl(val) == val)
 212                         fputs(".0", out);
 213         } else {
 214                 panic("unknown constant");
 215         }
 216
 217         char const* suffix;
 218         switch (type->atomic.akind) {
 219                 case ATOMIC_TYPE_UINT:        suffix = "U";   break;
 220                 case ATOMIC_TYPE_LONG:        suffix = "L";   break;
 221                 case ATOMIC_TYPE_ULONG:       suffix = "UL";  break;
 222                 case ATOMIC_TYPE_LONGLONG:    suffix = "LL";  break;
 223                 case ATOMIC_TYPE_ULONGLONG:   suffix = "ULL"; break;
 224                 case ATOMIC_TYPE_FLOAT:       suffix = "F";   break;
 225                 case ATOMIC_TYPE_LONG_DOUBLE: suffix = "L";   break;
 226
 227                 default: suffix = NULL; break;
 228         }
 229         if (suffix != NULL)
 230                 fputs(suffix, out);
 231 }
 232
 233 /**
 234  * Print a quoted string constant.
 235  *
 236  * @param string  the string constant
 237  * @param border  the border char
 238  * @param skip    number of chars to skip at the end
 239  */
 240 static void print_quoted_string(const string_t *const string, char border, int skip)
 241 {
 242         fputc(border, out);
 243         const char *end = string->begin + string->size - skip;
 244         for (const char *c = string->begin; c != end; ++c) {
 245                 if (*c == border) {
 246                         fputc('\\', out);
 247                 }
 248                 switch (*c) {
 249                 case '\\':  fputs("\\\\", out); break;
 250                 case '\a':  fputs("\\a", out); break;
 251                 case '\b':  fputs("\\b", out); break;
 252                 case '\f':  fputs("\\f", out); break;
 253                 case '\n':  fputs("\\n", out); break;
 254                 case '\r':  fputs("\\r", out); break;
 255                 case '\t':  fputs("\\t", out); break;
 256                 case '\v':  fputs("\\v", out); break;
 257                 case '\?':  fputs("\\?", out); break;
 258                 case 27:
 259                         if (c_mode & _GNUC) {
 260                                 fputs("\\e", out); break;
 261                         }
 262                         /*fallthrough*/
 263                 default:
 264                         if(!isprint(*c)) {
 265                                 fprintf(out, "\\%03o", (unsigned)*c);
 266                                 break;
 267                         }
 268                         fputc(*c, out);
 269                         break;
 270                 }
 271         }
 272         fputc(border, out);
 273 }
 274
 275 /**
 276  * Prints a wide string literal expression.
 277  *
 278  * @param wstr    the wide string literal expression
 279  * @param border  the border char
 280  * @param skip    number of chars to skip at the end
 281  */
 282 static void print_quoted_wide_string(const wide_string_t *const wstr,
 283                                      char border, int skip)
 284 {
 285         fputc('L', out);
 286         fputc(border, out);
 287         const wchar_rep_t *end = wstr->begin + wstr->size - skip;
 288         for (const wchar_rep_t *c = wstr->begin; c != end; ++c) {
 289                 switch (*c) {
 290                         case L'\"':  fputs("\\\"", out); break;
 291                         case L'\\':  fputs("\\\\", out); break;
 292                         case L'\a':  fputs("\\a",  out); break;
 293                         case L'\b':  fputs("\\b",  out); break;
 294                         case L'\f':  fputs("\\f",  out); break;
 295                         case L'\n':  fputs("\\n",  out); break;
 296                         case L'\r':  fputs("\\r",  out); break;
 297                         case L'\t':  fputs("\\t",  out); break;
 298                         case L'\v':  fputs("\\v",  out); break;
 299                         case L'\?':  fputs("\\?",  out); break;
 300                         case 27:
 301                                 if (c_mode & _GNUC) {
 302                                         fputs("\\e", out); break;
 303                                 }
 304                                 /*fallthrough*/
 305                         default: {
 306                                 const unsigned tc = *c;
 307                                 if (tc < 0x80U) {
 308                                         if (!isprint(*c))  {
 309                                                 fprintf(out, "\\%03o", (char)*c);
 310                                         } else {
 311                                                 fputc(*c, out);
 312                                         }
 313                                 } else if (tc < 0x800) {
 314                                         fputc(0xC0 | (tc >> 6),   out);
 315                                         fputc(0x80 | (tc & 0x3F), out);
 316                                 } else if (tc < 0x10000) {
 317                                         fputc(0xE0 | ( tc >> 12),         out);
 318                                         fputc(0x80 | ((tc >>  6) & 0x3F), out);
 319                                         fputc(0x80 | ( tc        & 0x3F), out);
 320                                 } else {
 321                                         fputc(0xF0 | ( tc >> 18),         out);
 322                                         fputc(0x80 | ((tc >> 12) & 0x3F), out);
 323                                         fputc(0x80 | ((tc >>  6) & 0x3F), out);
 324                                         fputc(0x80 | ( tc        & 0x3F), out);
 325                                 }
 326                         }
 327                 }
 328         }
 329         fputc(border, out);
 330 }
 331
 332 /**
 333  * Print a constant character expression.
 334  *
 335  * @param cnst  the constant character expression
 336  */
 337 static void print_character_constant(const const_expression_t *cnst)
 338 {
 339         print_quoted_string(&cnst->v.character, '\'', 0);
 340 }
 341
 342 static void print_wide_character_constant(const const_expression_t *cnst)
 343 {
 344         print_quoted_wide_string(&cnst->v.wide_character, '\'', 0);
 345 }
 346
 347 /**
 348  * Prints a string literal expression.
 349  *
 350  * @param string_literal  the string literal expression
 351  */
 352 static void print_string_literal(
 353                 const string_literal_expression_t *string_literal)
 354 {
 355         print_quoted_string(&string_literal->value, '"', 1);
 356 }
 357
 358 /**
 359  * Prints a predefined symbol.
 360  */
 361 static void print_funcname(
 362                 const funcname_expression_t *funcname)
 363 {
 364         const char *s = "";
 365         switch (funcname->kind) {
 366         case FUNCNAME_FUNCTION:        s = (c_mode & _C99) ? "__func__" : "__FUNCTION__"; break;
 367         case FUNCNAME_PRETTY_FUNCTION: s = "__PRETTY_FUNCTION__"; break;
 368         case FUNCNAME_FUNCSIG:         s = "__FUNCSIG__"; break;
 369         case FUNCNAME_FUNCDNAME:       s = "__FUNCDNAME__"; break;
 370         }
 371         fputc('"', out);
 372         fputs(s, out);
 373         fputc('"', out);
 374 }
 375
 376 static void print_wide_string_literal(
 377         const wide_string_literal_expression_t *const wstr)
 378 {
 379         print_quoted_wide_string(&wstr->value, '"', 1);
 380 }
 381
 382 static void print_compound_literal(
 383                 const compound_literal_expression_t *expression)
 384 {
 385         fputc('(', out);
 386         print_type(expression->type);
 387         fputc(')', out);
 388         print_initializer(expression->initializer);
 389 }
 390
 391 /**
 392  * Prints a call expression.
 393  *
 394  * @param call  the call expression
 395  */
 396 static void print_call_expression(const call_expression_t *call)
 397 {
 398         unsigned prec = get_expression_precedence(call->base.kind);
 399         print_expression_prec(call->function, prec);
 400         fputc('(', out);
 401         call_argument_t *argument = call->arguments;
 402         int              first    = 1;
 403         while(argument != NULL) {
 404                 if(!first) {
 405                         fputs(", ", out);
 406                 } else {
 407                         first = 0;
 408                 }
 409                 print_expression_prec(argument->expression, 2 * PREC_ASSIGNMENT);
 410
 411                 argument = argument->next;
 412         }
 413         fputc(')', out);
 414 }
 415
 416 /**
 417  * Prints a binary expression.
 418  *
 419  * @param binexpr   the binary expression
 420  */
 421 static void print_binary_expression(const binary_expression_t *binexpr)
 422 {
 423         unsigned prec = get_expression_precedence(binexpr->base.kind);
 424         int      r2l  = right_to_left(prec);
 425
 426         if(binexpr->base.kind == EXPR_BINARY_BUILTIN_EXPECT) {
 427                 fputs("__builtin_expect(", out);
 428                 print_expression_prec(binexpr->left, prec);
 429                 fputs(", ", out);
 430                 print_expression_prec(binexpr->right, prec);
 431                 fputc(')', out);
 432                 return;
 433         }
 434
 435         print_expression_prec(binexpr->left, prec + r2l);
 436         char const* op;
 437         switch (binexpr->base.kind) {
 438         case EXPR_BINARY_COMMA:              op = ", ";    break;
 439         case EXPR_BINARY_ASSIGN:             op = " = ";   break;
 440         case EXPR_BINARY_ADD:                op = " + ";   break;
 441         case EXPR_BINARY_SUB:                op = " - ";   break;
 442         case EXPR_BINARY_MUL:                op = " * ";   break;
 443         case EXPR_BINARY_MOD:                op = " % ";   break;
 444         case EXPR_BINARY_DIV:                op = " / ";   break;
 445         case EXPR_BINARY_BITWISE_OR:         op = " | ";   break;
 446         case EXPR_BINARY_BITWISE_AND:        op = " & ";   break;
 447         case EXPR_BINARY_BITWISE_XOR:        op = " ^ ";   break;
 448         case EXPR_BINARY_LOGICAL_OR:         op = " || ";  break;
 449         case EXPR_BINARY_LOGICAL_AND:        op = " && ";  break;
 450         case EXPR_BINARY_NOTEQUAL:           op = " != ";  break;
 451         case EXPR_BINARY_EQUAL:              op = " == ";  break;
 452         case EXPR_BINARY_LESS:               op = " < ";   break;
 453         case EXPR_BINARY_LESSEQUAL:          op = " <= ";  break;
 454         case EXPR_BINARY_GREATER:            op = " > ";   break;
 455         case EXPR_BINARY_GREATEREQUAL:       op = " >= ";  break;
 456         case EXPR_BINARY_SHIFTLEFT:          op = " << ";  break;
 457         case EXPR_BINARY_SHIFTRIGHT:         op = " >> ";  break;
 458
 459         case EXPR_BINARY_ADD_ASSIGN:         op = " += ";  break;
 460         case EXPR_BINARY_SUB_ASSIGN:         op = " -= ";  break;
 461         case EXPR_BINARY_MUL_ASSIGN:         op = " *= ";  break;
 462         case EXPR_BINARY_MOD_ASSIGN:         op = " %= ";  break;
 463         case EXPR_BINARY_DIV_ASSIGN:         op = " /= ";  break;
 464         case EXPR_BINARY_BITWISE_OR_ASSIGN:  op = " |= ";  break;
 465         case EXPR_BINARY_BITWISE_AND_ASSIGN: op = " &= ";  break;
 466         case EXPR_BINARY_BITWISE_XOR_ASSIGN: op = " ^= ";  break;
 467         case EXPR_BINARY_SHIFTLEFT_ASSIGN:   op = " <<= "; break;
 468         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:  op = " >>= "; break;
 469         default: panic("invalid binexpression found");
 470         }
 471         fputs(op, out);
 472         print_expression_prec(binexpr->right, prec - r2l);
 473 }
 474
 475 /**
 476  * Prints an unary expression.
 477  *
 478  * @param unexpr   the unary expression
 479  */
 480 static void print_unary_expression(const unary_expression_t *unexpr)
 481 {
 482         unsigned prec = get_expression_precedence(unexpr->base.kind);
 483         switch (unexpr->base.kind) {
 484         case EXPR_UNARY_NEGATE:           fputc('-',          out); break;
 485         case EXPR_UNARY_PLUS:             fputc('+',          out); break;
 486         case EXPR_UNARY_NOT:              fputc('!',          out); break;
 487         case EXPR_UNARY_BITWISE_NEGATE:   fputc('~',          out); break;
 488         case EXPR_UNARY_PREFIX_INCREMENT: fputs("++",         out); break;
 489         case EXPR_UNARY_PREFIX_DECREMENT: fputs("--",         out); break;
 490         case EXPR_UNARY_DEREFERENCE:      fputc('*',          out); break;
 491         case EXPR_UNARY_TAKE_ADDRESS:     fputc('&',          out); break;
 492         case EXPR_UNARY_DELETE:           fputs("delete ",    out); break;
 493         case EXPR_UNARY_DELETE_ARRAY:     fputs("delete [] ", out); break;
 494
 495         case EXPR_UNARY_POSTFIX_INCREMENT:
 496                 print_expression_prec(unexpr->value, prec);
 497                 fputs("++", out);
 498                 return;
 499         case EXPR_UNARY_POSTFIX_DECREMENT:
 500                 print_expression_prec(unexpr->value, prec);
 501                 fputs("--", out);
 502                 return;
 503         case EXPR_UNARY_CAST_IMPLICIT:
 504         case EXPR_UNARY_CAST:
 505                 fputc('(', out);
 506                 print_type(unexpr->base.type);
 507                 fputc(')', out);
 508                 break;
 509         case EXPR_UNARY_ASSUME:
 510                 fputs("__assume(", out);
 511                 print_expression_prec(unexpr->value, 2 * PREC_ASSIGNMENT);
 512                 fputc(')', out);
 513                 return;
 514
 515         case EXPR_UNARY_THROW:
 516                 if (unexpr->value == NULL) {
 517                         fputs("throw", out);
 518                         return;
 519                 }
 520                 fputs("throw ", out);
 521                 break;
 522
 523         default:
 524                 panic("invalid unary expression found");
 525         }
 526         print_expression_prec(unexpr->value, prec);
 527 }
 528
 529 /**
 530  * Prints a reference expression.
 531  *
 532  * @param ref   the reference expression
 533  */
 534 static void print_reference_expression(const reference_expression_t *ref)
 535 {
 536         fputs(ref->entity->base.symbol->string, out);
 537 }
 538
 539 /**
 540  * Prints a label address expression.
 541  *
 542  * @param ref   the reference expression
 543  */
 544 static void print_label_address_expression(const label_address_expression_t *le)
 545 {
 546         fprintf(out, "&&%s", le->label->base.symbol->string);
 547 }
 548
 549 /**
 550  * Prints an array expression.
 551  *
 552  * @param expression   the array expression
 553  */
 554 static void print_array_expression(const array_access_expression_t *expression)
 555 {
 556         unsigned prec = get_expression_precedence(expression->base.kind);
 557         if(!expression->flipped) {
 558                 print_expression_prec(expression->array_ref, prec);
 559                 fputc('[', out);
 560                 print_expression(expression->index);
 561                 fputc(']', out);
 562         } else {
 563                 print_expression_prec(expression->index, prec);
 564                 fputc('[', out);
 565                 print_expression(expression->array_ref);
 566                 fputc(']', out);
 567         }
 568 }
 569
 570 /**
 571  * Prints a typeproperty expression (sizeof or __alignof__).
 572  *
 573  * @param expression   the type property expression
 574  */
 575 static void print_typeprop_expression(const typeprop_expression_t *expression)
 576 {
 577         if (expression->base.kind == EXPR_SIZEOF) {
 578                 fputs("sizeof", out);
 579         } else {
 580                 assert(expression->base.kind == EXPR_ALIGNOF);
 581                 fputs("__alignof__", out);
 582         }
 583         if(expression->tp_expression != NULL) {
 584                 /* always print the '()' here, sizeof x is right but unusual */
 585                 fputc('(', out);
 586                 print_expression(expression->tp_expression);
 587                 fputc(')', out);
 588         } else {
 589                 fputc('(', out);
 590                 print_type(expression->type);
 591                 fputc(')', out);
 592         }
 593 }
 594
 595 /**
 596  * Prints an builtin symbol.
 597  *
 598  * @param expression   the builtin symbol expression
 599  */
 600 static void print_builtin_symbol(const builtin_symbol_expression_t *expression)
 601 {
 602         fputs(expression->symbol->string, out);
 603 }
 604
 605 /**
 606  * Prints a builtin constant expression.
 607  *
 608  * @param expression   the builtin constant expression
 609  */
 610 static void print_builtin_constant(const builtin_constant_expression_t *expression)
 611 {
 612         fputs("__builtin_constant_p(", out);
 613         print_expression_prec(expression->value, 2 * PREC_ASSIGNMENT);
 614         fputc(')', out);
 615 }
 616
 617 /**
 618  * Prints a builtin prefetch expression.
 619  *
 620  * @param expression   the builtin prefetch expression
 621  */
 622 static void print_builtin_prefetch(const builtin_prefetch_expression_t *expression)
 623 {
 624         fputs("__builtin_prefetch(", out);
 625         print_expression_prec(expression->adr, 2 * PREC_ASSIGNMENT);
 626         if (expression->rw) {
 627                 fputc(',', out);
 628                 print_expression_prec(expression->rw, 2 * PREC_ASSIGNMENT);
 629         }
 630         if (expression->locality) {
 631                 fputc(',', out);
 632                 print_expression_prec(expression->locality, 2 * PREC_ASSIGNMENT);
 633         }
 634         fputc(')', out);
 635 }
 636
 637 /**
 638  * Prints a conditional expression.
 639  *
 640  * @param expression   the conditional expression
 641  */
 642 static void print_conditional(const conditional_expression_t *expression)
 643 {
 644         print_expression_prec(expression->condition, 2 * PREC_LOGICAL_OR);
 645         fputs(" ? ", out);
 646         if (expression->true_expression != NULL) {
 647                 print_expression_prec(expression->true_expression, 2 * PREC_EXPRESSION);
 648                 fputs(" : ", out);
 649         } else {
 650                 fputs(": ", out);
 651         }
 652         print_expression_prec(expression->false_expression, 2 * PREC_CONDITIONAL);
 653 }
 654
 655 /**
 656  * Prints a va_start expression.
 657  *
 658  * @param expression   the va_start expression
 659  */
 660 static void print_va_start(const va_start_expression_t *const expression)
 661 {
 662         fputs("__builtin_va_start(", out);
 663         print_expression_prec(expression->ap, 2 * PREC_ASSIGNMENT);
 664         fputs(", ", out);
 665         fputs(expression->parameter->base.base.symbol->string, out);
 666         fputc(')', out);
 667 }
 668
 669 /**
 670  * Prints a va_arg expression.
 671  *
 672  * @param expression   the va_arg expression
 673  */
 674 static void print_va_arg(const va_arg_expression_t *expression)
 675 {
 676         fputs("__builtin_va_arg(", out);
 677         print_expression_prec(expression->ap, 2 * PREC_ASSIGNMENT);
 678         fputs(", ", out);
 679         print_type(expression->base.type);
 680         fputc(')', out);
 681 }
 682
 683 /**
 684  * Prints a select expression (. or ->).
 685  *
 686  * @param expression   the select expression
 687  */
 688 static void print_select(const select_expression_t *expression)
 689 {
 690         unsigned prec = get_expression_precedence(expression->base.kind);
 691         print_expression_prec(expression->compound, prec);
 692         if(is_type_pointer(skip_typeref(expression->compound->base.type))) {
 693                 fputs("->", out);
 694         } else {
 695                 fputc('.', out);
 696         }
 697         fputs(expression->compound_entry->base.symbol->string, out);
 698 }
 699
 700 /**
 701  * Prints a type classify expression.
 702  *
 703  * @param expr   the type classify expression
 704  */
 705 static void print_classify_type_expression(
 706         const classify_type_expression_t *const expr)
 707 {
 708         fputs("__builtin_classify_type(", out);
 709         print_expression_prec(expr->type_expression, 2 * PREC_ASSIGNMENT);
 710         fputc(')', out);
 711 }
 712
 713 /**
 714  * Prints a designator.
 715  *
 716  * @param designator  the designator
 717  */
 718 static void print_designator(const designator_t *designator)
 719 {
 720         for ( ; designator != NULL; designator = designator->next) {
 721                 if (designator->symbol == NULL) {
 722                         fputc('[', out);
 723                         print_expression(designator->array_index);
 724                         fputc(']', out);
 725                 } else {
 726                         fputc('.', out);
 727                         fputs(designator->symbol->string, out);
 728                 }
 729         }
 730 }
 731
 732 /**
 733  * Prints an offsetof expression.
 734  *
 735  * @param expression   the offset expression
 736  */
 737 static void print_offsetof_expression(const offsetof_expression_t *expression)
 738 {
 739         fputs("__builtin_offsetof", out);
 740         fputc('(', out);
 741         print_type(expression->type);
 742         fputc(',', out);
 743         print_designator(expression->designator);
 744         fputc(')', out);
 745 }
 746
 747 /**
 748  * Prints a statement expression.
 749  *
 750  * @param expression   the statement expression
 751  */
 752 static void print_statement_expression(const statement_expression_t *expression)
 753 {
 754         fputc('(', out);
 755         print_statement(expression->statement);
 756         fputc(')', out);
 757 }
 758
 759 /**
 760  * Prints an expression with parenthesis if needed.
 761  *
 762  * @param expression  the expression to print
 763  * @param top_prec    the precedence of the user of this expression.
 764  */
 765 static void print_expression_prec(const expression_t *expression, unsigned top_prec)
 766 {
 767         if (expression->kind == EXPR_UNARY_CAST_IMPLICIT && !print_implicit_casts) {
 768                 expression = expression->unary.value;
 769         }
 770         unsigned prec = get_expression_precedence(expression->base.kind);
 771         if (print_parenthesis && top_prec != PREC_BOTTOM)
 772                 top_prec = PREC_TOP;
 773         if (top_prec > prec)
 774                 fputc('(', out);
 775         switch (expression->kind) {
 776         case EXPR_UNKNOWN:
 777         case EXPR_INVALID:
 778                 fputs("$invalid expression$", out);
 779                 break;
 780         case EXPR_CHARACTER_CONSTANT:
 781                 print_character_constant(&expression->conste);
 782                 break;
 783         case EXPR_WIDE_CHARACTER_CONSTANT:
 784                 print_wide_character_constant(&expression->conste);
 785                 break;
 786         case EXPR_CONST:
 787                 print_const(&expression->conste);
 788                 break;
 789         case EXPR_FUNCNAME:
 790                 print_funcname(&expression->funcname);
 791                 break;
 792         case EXPR_STRING_LITERAL:
 793                 print_string_literal(&expression->string);
 794                 break;
 795         case EXPR_WIDE_STRING_LITERAL:
 796                 print_wide_string_literal(&expression->wide_string);
 797                 break;
 798         case EXPR_COMPOUND_LITERAL:
 799                 print_compound_literal(&expression->compound_literal);
 800                 break;
 801         case EXPR_CALL:
 802                 print_call_expression(&expression->call);
 803                 break;
 804         EXPR_BINARY_CASES
 805                 print_binary_expression(&expression->binary);
 806                 break;
 807         case EXPR_REFERENCE:
 808         case EXPR_REFERENCE_ENUM_VALUE:
 809                 print_reference_expression(&expression->reference);
 810                 break;
 811         case EXPR_ARRAY_ACCESS:
 812                 print_array_expression(&expression->array_access);
 813                 break;
 814         case EXPR_LABEL_ADDRESS:
 815                 print_label_address_expression(&expression->label_address);
 816                 break;
 817         EXPR_UNARY_CASES
 818                 print_unary_expression(&expression->unary);
 819                 break;
 820         case EXPR_SIZEOF:
 821         case EXPR_ALIGNOF:
 822                 print_typeprop_expression(&expression->typeprop);
 823                 break;
 824         case EXPR_BUILTIN_SYMBOL:
 825                 print_builtin_symbol(&expression->builtin_symbol);
 826                 break;
 827         case EXPR_BUILTIN_CONSTANT_P:
 828                 print_builtin_constant(&expression->builtin_constant);
 829                 break;
 830         case EXPR_BUILTIN_PREFETCH:
 831                 print_builtin_prefetch(&expression->builtin_prefetch);
 832                 break;
 833         case EXPR_CONDITIONAL:
 834                 print_conditional(&expression->conditional);
 835                 break;
 836         case EXPR_VA_START:
 837                 print_va_start(&expression->va_starte);
 838                 break;
 839         case EXPR_VA_ARG:
 840                 print_va_arg(&expression->va_arge);
 841                 break;
 842         case EXPR_SELECT:
 843                 print_select(&expression->select);
 844                 break;
 845         case EXPR_CLASSIFY_TYPE:
 846                 print_classify_type_expression(&expression->classify_type);
 847                 break;
 848         case EXPR_OFFSETOF:
 849                 print_offsetof_expression(&expression->offsetofe);
 850                 break;
 851         case EXPR_STATEMENT:
 852                 print_statement_expression(&expression->statement);
 853                 break;
 854
 855         default:
 856                 /* TODO */
 857                 fprintf(out, "some expression of type %d", (int) expression->kind);
 858                 break;
 859         }
 860         if (top_prec > prec)
 861                 fputc(')', out);
 862 }
 863
 864 /**
 865  * Print an compound statement.
 866  *
 867  * @param block  the compound statement
 868  */
 869 static void print_compound_statement(const compound_statement_t *block)
 870 {
 871         fputs("{\n", out);
 872         ++indent;
 873
 874         statement_t *statement = block->statements;
 875         while (statement != NULL) {
 876                 if (statement->base.kind == STATEMENT_CASE_LABEL)
 877                         --indent;
 878                 if (statement->kind != STATEMENT_LABEL)
 879                         print_indent();
 880                 print_statement(statement);
 881
 882                 statement = statement->base.next;
 883         }
 884         --indent;
 885         print_indent();
 886         fputs("}\n", out);
 887 }
 888
 889 /**
 890  * Print a return statement.
 891  *
 892  * @param statement  the return statement
 893  */
 894 static void print_return_statement(const return_statement_t *statement)
 895 {
 896         fputs("return ", out);
 897         if(statement->value != NULL)
 898                 print_expression(statement->value);
 899         fputs(";\n", out);
 900 }
 901
 902 /**
 903  * Print an expression statement.
 904  *
 905  * @param statement  the expression statement
 906  */
 907 static void print_expression_statement(const expression_statement_t *statement)
 908 {
 909         print_expression(statement->expression);
 910         fputs(";\n", out);
 911 }
 912
 913 /**
 914  * Print a goto statement.
 915  *
 916  * @param statement  the goto statement
 917  */
 918 static void print_goto_statement(const goto_statement_t *statement)
 919 {
 920         fputs("goto ", out);
 921         if (statement->expression != NULL) {
 922                 fputc('*', out);
 923                 print_expression(statement->expression);
 924         } else {
 925                 fputs(statement->label->base.symbol->string, out);
 926         }
 927         fputs(";\n", out);
 928 }
 929
 930 /**
 931  * Print a label statement.
 932  *
 933  * @param statement  the label statement
 934  */
 935 static void print_label_statement(const label_statement_t *statement)
 936 {
 937         fprintf(out, "%s:\n", statement->label->base.symbol->string);
 938         print_indent();
 939         print_statement(statement->statement);
 940 }
 941
 942 /**
 943  * Print an if statement.
 944  *
 945  * @param statement  the if statement
 946  */
 947 static void print_if_statement(const if_statement_t *statement)
 948 {
 949         fputs("if (", out);
 950         print_expression(statement->condition);
 951         fputs(") ", out);
 952         print_statement(statement->true_statement);
 953
 954         if(statement->false_statement != NULL) {
 955                 print_indent();
 956                 fputs("else ", out);
 957                 print_statement(statement->false_statement);
 958         }
 959 }
 960
 961 /**
 962  * Print a switch statement.
 963  *
 964  * @param statement  the switch statement
 965  */
 966 static void print_switch_statement(const switch_statement_t *statement)
 967 {
 968         fputs("switch (", out);
 969         print_expression(statement->expression);
 970         fputs(") ", out);
 971         print_statement(statement->body);
 972 }
 973
 974 /**
 975  * Print a case label (including the default label).
 976  *
 977  * @param statement  the case label statement
 978  */
 979 static void print_case_label(const case_label_statement_t *statement)
 980 {
 981         if(statement->expression == NULL) {
 982                 fputs("default:\n", out);
 983         } else {
 984                 fputs("case ", out);
 985                 print_expression(statement->expression);
 986                 if (statement->end_range != NULL) {
 987                         fputs(" ... ", out);
 988                         print_expression(statement->end_range);
 989                 }
 990                 fputs(":\n", out);
 991         }
 992         ++indent;
 993         if(statement->statement != NULL) {
 994                 if (statement->statement->base.kind == STATEMENT_CASE_LABEL) {
 995                         --indent;
 996                 }
 997                 print_indent();
 998                 print_statement(statement->statement);
 999         }
1000 }
1001
1002 static void print_local_label(const local_label_statement_t *statement)
1003 {
1004         fputs("__label__ ", out);
1005
1006         bool      first  = true;
1007         entity_t *entity = statement->labels_begin;
1008         for (;
1009                 entity != statement->labels_end->base.next;
1010                 entity = entity->base.next) {
1011                 if (!first) {
1012                         fputs(", ", out);
1013                 } else {
1014                         first = false;
1015                 }
1016                 fputs(entity->base.symbol->string, out);
1017         }
1018         fputs(";\n", out);
1019 }
1020
1021 static void print_typedef(const entity_t *entity)
1022 {
1023         fputs("typedef ", out);
1024         print_type_ext(entity->typedefe.type, entity->base.symbol, NULL);
1025         fputs(";", out);
1026 }
1027
1028 /**
1029  * returns true if the entity is a compiler generated one and has no real
1030  * correspondenc in the source file
1031  */
1032 static bool is_generated_entity(const entity_t *entity)
1033 {
1034         if (entity->kind == ENTITY_TYPEDEF)
1035                 return entity->typedefe.builtin;
1036
1037         if (is_declaration(entity))
1038                 return entity->declaration.implicit;
1039
1040         return false;
1041 }
1042
1043 /**
1044  * Print a declaration statement.
1045  *
1046  * @param statement   the statement
1047  */
1048 static void print_declaration_statement(
1049                 const declaration_statement_t *statement)
1050 {
1051         bool first = true;
1052         entity_t *entity = statement->declarations_begin;
1053         for (;
1054                  entity != statement->declarations_end->base.next;
1055                  entity = entity->base.next) {
1056                 if (!is_declaration(entity) && entity->kind != ENTITY_TYPEDEF)
1057                         continue;
1058                 if (is_generated_entity(entity))
1059                         continue;
1060
1061                 if (!first) {
1062                         print_indent();
1063                 } else {
1064                         first = false;
1065                 }
1066
1067                 if (entity->kind == ENTITY_TYPEDEF) {
1068                         print_typedef(entity);
1069                 } else {
1070                         assert(is_declaration(entity));
1071                         print_declaration(entity);
1072                 }
1073
1074                 fputc('\n', out);
1075         }
1076 }
1077
1078 /**
1079  * Print a while statement.
1080  *
1081  * @param statement   the statement
1082  */
1083 static void print_while_statement(const while_statement_t *statement)
1084 {
1085         fputs("while (", out);
1086         print_expression(statement->condition);
1087         fputs(") ", out);
1088         print_statement(statement->body);
1089 }
1090
1091 /**
1092  * Print a do-while statement.
1093  *
1094  * @param statement   the statement
1095  */
1096 static void print_do_while_statement(const do_while_statement_t *statement)
1097 {
1098         fputs("do ", out);
1099         print_statement(statement->body);
1100         print_indent();
1101         fputs("while (", out);
1102         print_expression(statement->condition);
1103         fputs(");\n", out);
1104 }
1105
1106 /**
1107  * Print a for statement.
1108  *
1109  * @param statement   the statement
1110  */
1111 static void print_for_statement(const for_statement_t *statement)
1112 {
1113         fputs("for (", out);
1114         entity_t *entity = statement->scope.entities;
1115         while (entity != NULL && is_generated_entity(entity))
1116                 entity = entity->base.next;
1117
1118         if (entity != NULL) {
1119                 assert(statement->initialisation == NULL);
1120                 assert(is_declaration(entity));
1121                 print_declaration(entity);
1122                 if (entity->base.next != NULL) {
1123                         panic("multiple declarations in for statement not supported yet");
1124                 }
1125                 fputc(' ', out);
1126         } else {
1127                 if(statement->initialisation) {
1128                         print_expression(statement->initialisation);
1129                 }
1130                 fputs("; ", out);
1131         }
1132         if(statement->condition != NULL) {
1133                 print_expression(statement->condition);
1134         }
1135         fputs("; ", out);
1136         if(statement->step != NULL) {
1137                 print_expression(statement->step);
1138         }
1139         fputs(") ", out);
1140         print_statement(statement->body);
1141 }
1142
1143 /**
1144  * Print assembler arguments.
1145  *
1146  * @param arguments   the arguments
1147  */
1148 static void print_asm_arguments(asm_argument_t *arguments)
1149 {
1150         asm_argument_t *argument = arguments;
1151         for( ; argument != NULL; argument = argument->next) {
1152                 if(argument != arguments)
1153                         fputs(", ", out);
1154
1155                 if(argument->symbol) {
1156                         fprintf(out, "[%s] ", argument->symbol->string);
1157                 }
1158                 print_quoted_string(&argument->constraints, '"', 1);
1159                 fputs(" (", out);
1160                 print_expression(argument->expression);
1161                 fputc(')', out);
1162         }
1163 }
1164
1165 /**
1166  * Print assembler clobbers.
1167  *
1168  * @param clobbers   the clobbers
1169  */
1170 static void print_asm_clobbers(asm_clobber_t *clobbers)
1171 {
1172         asm_clobber_t *clobber = clobbers;
1173         for( ; clobber != NULL; clobber = clobber->next) {
1174                 if(clobber != clobbers)
1175                         fputs(", ", out);
1176
1177                 print_quoted_string(&clobber->clobber, '"', 1);
1178         }
1179 }
1180
1181 /**
1182  * Print an assembler statement.
1183  *
1184  * @param statement   the statement
1185  */
1186 static void print_asm_statement(const asm_statement_t *statement)
1187 {
1188         fputs("asm ", out);
1189         if(statement->is_volatile) {
1190                 fputs("volatile ", out);
1191         }
1192         fputc('(', out);
1193         print_quoted_string(&statement->asm_text, '"', 1);
1194         if (statement->outputs  == NULL &&
1195             statement->inputs   == NULL &&
1196             statement->clobbers == NULL)
1197                 goto end_of_print_asm_statement;
1198
1199         fputs(" : ", out);
1200         print_asm_arguments(statement->outputs);
1201         if (statement->inputs == NULL && statement->clobbers == NULL)
1202                 goto end_of_print_asm_statement;
1203
1204         fputs(" : ", out);
1205         print_asm_arguments(statement->inputs);
1206         if (statement->clobbers == NULL)
1207                 goto end_of_print_asm_statement;
1208
1209         fputs(" : ", out);
1210         print_asm_clobbers(statement->clobbers);
1211
1212 end_of_print_asm_statement:
1213         fputs(");\n", out);
1214 }
1215
1216 /**
1217  * Print a microsoft __try statement.
1218  *
1219  * @param statement   the statement
1220  */
1221 static void print_ms_try_statement(const ms_try_statement_t *statement)
1222 {
1223         fputs("__try ", out);
1224         print_statement(statement->try_statement);
1225         print_indent();
1226         if(statement->except_expression != NULL) {
1227                 fputs("__except(", out);
1228                 print_expression(statement->except_expression);
1229                 fputs(") ", out);
1230         } else {
1231                 fputs("__finally ", out);
1232         }
1233         print_statement(statement->final_statement);
1234 }
1235
1236 /**
1237  * Print a microsoft __leave statement.
1238  *
1239  * @param statement   the statement
1240  */
1241 static void print_leave_statement(const leave_statement_t *statement)
1242 {
1243         (void) statement;
1244         fputs("__leave;\n", out);
1245 }
1246
1247 /**
1248  * Print a statement.
1249  *
1250  * @param statement   the statement
1251  */
1252 void print_statement(const statement_t *statement)
1253 {
1254         switch (statement->kind) {
1255         case STATEMENT_EMPTY:
1256                 fputs(";\n", out);
1257                 break;
1258         case STATEMENT_COMPOUND:
1259                 print_compound_statement(&statement->compound);
1260                 break;
1261         case STATEMENT_RETURN:
1262                 print_return_statement(&statement->returns);
1263                 break;
1264         case STATEMENT_EXPRESSION:
1265                 print_expression_statement(&statement->expression);
1266                 break;
1267         case STATEMENT_LABEL:
1268                 print_label_statement(&statement->label);
1269                 break;
1270         case STATEMENT_LOCAL_LABEL:
1271                 print_local_label(&statement->local_label);
1272                 break;
1273         case STATEMENT_GOTO:
1274                 print_goto_statement(&statement->gotos);
1275                 break;
1276         case STATEMENT_CONTINUE:
1277                 fputs("continue;\n", out);
1278                 break;
1279         case STATEMENT_BREAK:
1280                 fputs("break;\n", out);
1281                 break;
1282         case STATEMENT_IF:
1283                 print_if_statement(&statement->ifs);
1284                 break;
1285         case STATEMENT_SWITCH:
1286                 print_switch_statement(&statement->switchs);
1287                 break;
1288         case STATEMENT_CASE_LABEL:
1289                 print_case_label(&statement->case_label);
1290                 break;
1291         case STATEMENT_DECLARATION:
1292                 print_declaration_statement(&statement->declaration);
1293                 break;
1294         case STATEMENT_WHILE:
1295                 print_while_statement(&statement->whiles);
1296                 break;
1297         case STATEMENT_DO_WHILE:
1298                 print_do_while_statement(&statement->do_while);
1299                 break;
1300         case STATEMENT_FOR:
1301                 print_for_statement(&statement->fors);
1302                 break;
1303         case STATEMENT_ASM:
1304                 print_asm_statement(&statement->asms);
1305                 break;
1306         case STATEMENT_MS_TRY:
1307                 print_ms_try_statement(&statement->ms_try);
1308                 break;
1309         case STATEMENT_LEAVE:
1310                 print_leave_statement(&statement->leave);
1311                 break;
1312         case STATEMENT_INVALID:
1313                 fputs("$invalid statement$\n", out);
1314                 break;
1315         }
1316 }
1317
1318 /**
1319  * Print a storage class.
1320  *
1321  * @param storage_class   the storage class
1322  */
1323 static void print_storage_class(storage_class_tag_t storage_class)
1324 {
1325         switch (storage_class) {
1326         case STORAGE_CLASS_NONE:
1327                 break;
1328         case STORAGE_CLASS_TYPEDEF:       fputs("typedef ",        out); break;
1329         case STORAGE_CLASS_EXTERN:        fputs("extern ",         out); break;
1330         case STORAGE_CLASS_STATIC:        fputs("static ",         out); break;
1331         case STORAGE_CLASS_AUTO:          fputs("auto ",           out); break;
1332         case STORAGE_CLASS_REGISTER:      fputs("register ",       out); break;
1333         case STORAGE_CLASS_THREAD:        fputs("__thread",        out); break;
1334         case STORAGE_CLASS_THREAD_EXTERN: fputs("extern __thread", out); break;
1335         case STORAGE_CLASS_THREAD_STATIC: fputs("static __thread", out); break;
1336         }
1337 }
1338
1339 /**
1340  * Print an initializer.
1341  *
1342  * @param initializer  the initializer
1343  */
1344 void print_initializer(const initializer_t *initializer)
1345 {
1346         if(initializer == NULL) {
1347                 fputs("{}", out);
1348                 return;
1349         }
1350
1351         switch (initializer->kind) {
1352         case INITIALIZER_VALUE: {
1353                 const initializer_value_t *value = &initializer->value;
1354                 print_expression(value->value);
1355                 return;
1356         }
1357         case INITIALIZER_LIST: {
1358                 assert(initializer->kind == INITIALIZER_LIST);
1359                 fputs("{ ", out);
1360                 const initializer_list_t *list = &initializer->list;
1361
1362                 for(size_t i = 0 ; i < list->len; ++i) {
1363                         const initializer_t *sub_init = list->initializers[i];
1364                         print_initializer(list->initializers[i]);
1365                         if(i < list->len-1) {
1366                                 if(sub_init == NULL || sub_init->kind != INITIALIZER_DESIGNATOR)
1367                                         fputs(", ", out);
1368                         }
1369                 }
1370                 fputs(" }", out);
1371                 return;
1372         }
1373         case INITIALIZER_STRING:
1374                 print_quoted_string(&initializer->string.string, '"', 1);
1375                 return;
1376         case INITIALIZER_WIDE_STRING:
1377                 print_quoted_wide_string(&initializer->wide_string.string, '"', 1);
1378                 return;
1379         case INITIALIZER_DESIGNATOR:
1380                 print_designator(initializer->designator.designator);
1381                 fputs(" = ", out);
1382                 return;
1383         }
1384
1385         panic("invalid initializer kind found");
1386 }
1387
1388 /**
1389  * Print microsoft extended declaration modifiers.
1390  */
1391 static void print_ms_modifiers(const declaration_t *declaration)
1392 {
1393         if((c_mode & _MS) == 0)
1394                 return;
1395
1396         decl_modifiers_t modifiers = declaration->modifiers;
1397
1398         bool        ds_shown = false;
1399         const char *next     = "(";
1400
1401         if (declaration->base.kind == ENTITY_VARIABLE) {
1402                 variable_t *variable = (variable_t*) declaration;
1403                 if (variable->alignment != 0
1404                                 || variable->get_property_sym != NULL
1405                                 || variable->put_property_sym != NULL) {
1406                         if (!ds_shown) {
1407                                 fputs("__declspec", out);
1408                                 ds_shown = true;
1409                         }
1410
1411                         if(variable->alignment != 0) {
1412                                 fputs(next, out); next = ", "; fprintf(out, "align(%u)", variable->alignment);
1413                         }
1414                         if(variable->get_property_sym != NULL
1415                                         || variable->put_property_sym != NULL) {
1416                                 char *comma = "";
1417                                 fputs(next, out); next = ", "; fputs("property(", out);
1418                                 if(variable->get_property_sym != NULL) {
1419                                         fprintf(out, "get=%s", variable->get_property_sym->string);
1420                                         comma = ", ";
1421                                 }
1422                                 if(variable->put_property_sym != NULL)
1423                                         fprintf(out, "%sput=%s", comma, variable->put_property_sym->string);
1424                                 fputc(')', out);
1425                         }
1426                 }
1427         }
1428
1429         /* DM_FORCEINLINE handled outside. */
1430         if ((modifiers & ~DM_FORCEINLINE) != 0) {
1431                 if (!ds_shown) {
1432                         fputs("__declspec", out);
1433                         ds_shown = true;
1434                 }
1435                 if(modifiers & DM_DLLIMPORT) {
1436                         fputs(next, out); next = ", "; fputs("dllimport", out);
1437                 }
1438                 if(modifiers & DM_DLLEXPORT) {
1439                         fputs(next, out); next = ", "; fputs("dllexport", out);
1440                 }
1441                 if(modifiers & DM_THREAD) {
1442                         fputs(next, out); next = ", "; fputs("thread", out);
1443                 }
1444                 if(modifiers & DM_NAKED) {
1445                         fputs(next, out); next = ", "; fputs("naked", out);
1446                 }
1447                 if(modifiers & DM_THREAD) {
1448                         fputs(next, out); next = ", "; fputs("thread", out);
1449                 }
1450                 if(modifiers & DM_SELECTANY) {
1451                         fputs(next, out); next = ", "; fputs("selectany", out);
1452                 }
1453                 if(modifiers & DM_NOTHROW) {
1454                         fputs(next, out); next = ", "; fputs("nothrow", out);
1455                 }
1456                 if(modifiers & DM_NORETURN) {
1457                         fputs(next, out); next = ", "; fputs("noreturn", out);
1458                 }
1459                 if(modifiers & DM_NOINLINE) {
1460                         fputs(next, out); next = ", "; fputs("noinline", out);
1461                 }
1462                 if (modifiers & DM_DEPRECATED) {
1463                         fputs(next, out); next = ", "; fputs("deprecated", out);
1464                         if(declaration->deprecated_string != NULL)
1465                                 fprintf(out, "(\"%s\")",
1466                                         declaration->deprecated_string);
1467                 }
1468                 if(modifiers & DM_RESTRICT) {
1469                         fputs(next, out); next = ", "; fputs("restrict", out);
1470                 }
1471                 if(modifiers & DM_NOALIAS) {
1472                         fputs(next, out); next = ", "; fputs("noalias", out);
1473                 }
1474         }
1475
1476         if (ds_shown)
1477                 fputs(") ", out);
1478 }
1479
1480 static void print_scope(const scope_t *scope)
1481 {
1482         const entity_t *entity = scope->entities;
1483         for ( ; entity != NULL; entity = entity->base.next) {
1484                 print_indent();
1485                 print_entity(entity);
1486                 fputs("\n", out);
1487         }
1488 }
1489
1490 static void print_namespace(const namespace_t *namespace)
1491 {
1492         fputs("namespace ", out);
1493         if (namespace->base.symbol != NULL) {
1494                 fputs(namespace->base.symbol->string, out);
1495                 fputc(' ', out);
1496         }
1497
1498         fputs("{\n", out);
1499         ++indent;
1500
1501         print_scope(&namespace->members);
1502
1503         --indent;
1504         print_indent();
1505         fputs("}\n", out);
1506 }
1507
1508 /**
1509  * Print a variable or function declaration
1510  */
1511 void print_declaration(const entity_t *entity)
1512 {
1513         assert(is_declaration(entity));
1514         const declaration_t *declaration = &entity->declaration;
1515
1516         print_storage_class((storage_class_tag_t) declaration->declared_storage_class);
1517         if (entity->kind == ENTITY_FUNCTION) {
1518                 function_t *function = (function_t*) declaration;
1519                 if (function->is_inline) {
1520                         if (declaration->modifiers & DM_FORCEINLINE) {
1521                                 fputs("__forceinline ", out);
1522                         } else if (declaration->modifiers & DM_MICROSOFT_INLINE) {
1523                                 fputs("__inline ", out);
1524                         } else {
1525                                 fputs("inline ", out);
1526                         }
1527                 }
1528         }
1529         print_ms_modifiers(declaration);
1530         if (entity->kind == ENTITY_FUNCTION) {
1531                 print_type_ext(entity->declaration.type, entity->base.symbol,
1532                                &entity->function.parameters);
1533
1534                 if (entity->function.statement != NULL) {
1535                         fputs("\n", out);
1536                         print_indent();
1537                         print_statement(entity->function.statement);
1538                         return;
1539                 }
1540         } else {
1541                 print_type_ext(declaration->type, declaration->base.symbol, NULL);
1542
1543                 if (entity->kind == ENTITY_VARIABLE
1544                                 && entity->variable.initializer != NULL) {
1545                         fputs(" = ", out);
1546                         print_initializer(entity->variable.initializer);
1547                 }
1548         }
1549         fputc(';', out);
1550 }
1551
1552 /**
1553  * Prints an expression.
1554  *
1555  * @param expression  the expression
1556  */
1557 void print_expression(const expression_t *expression)
1558 {
1559         print_expression_prec(expression, 2 * PREC_BOTTOM);
1560 }
1561
1562 /**
1563  * Print a declaration.
1564  *
1565  * @param declaration  the declaration
1566  */
1567 void print_entity(const entity_t *entity)
1568 {
1569         if (entity->base.namespc != NAMESPACE_NORMAL && entity->base.symbol == NULL)
1570                 return;
1571
1572         switch ((entity_kind_tag_t) entity->kind) {
1573         case ENTITY_VARIABLE:
1574         case ENTITY_COMPOUND_MEMBER:
1575                 print_declaration(entity);
1576                 return;
1577         case ENTITY_FUNCTION:
1578                 print_declaration(entity);
1579                 return;
1580         case ENTITY_TYPEDEF:
1581                 print_typedef(entity);
1582                 return;
1583         case ENTITY_STRUCT:
1584                 fputs("struct ", out);
1585                 fputs(entity->base.symbol->string, out);
1586                 if (entity->structe.complete) {
1587                         fputc(' ', out);
1588                         print_compound_definition(&entity->structe);
1589                 }
1590                 fputc(';', out);
1591                 return;
1592         case ENTITY_UNION:
1593                 fputs("union ", out);
1594                 fputs(entity->base.symbol->string, out);
1595                 if (entity->unione.complete) {
1596                         fputc(' ', out);
1597                         print_compound_definition(&entity->unione);
1598                 }
1599                 fputc(';', out);
1600                 return;
1601         case ENTITY_ENUM:
1602                 fputs("enum ", out);
1603                 fputs(entity->base.symbol->string, out);
1604                 fputc(' ', out);
1605                 print_enum_definition(&entity->enume);
1606                 fputc(';', out);
1607                 return;
1608         case ENTITY_NAMESPACE:
1609                 print_namespace(&entity->namespacee);
1610                 return;
1611         case ENTITY_LABEL:
1612         case ENTITY_ENUM_VALUE:
1613         case ENTITY_LOCAL_LABEL:
1614                 panic("print_entity used on unexpected entity type");
1615         case ENTITY_INVALID:
1616                 break;
1617         }
1618         panic("Invalid entity type encountered");
1619 }
1620
1621 /**
1622  * Print the AST of a translation unit.
1623  *
1624  * @param unit   the translation unit
1625  */
1626 void print_ast(const translation_unit_t *unit)
1627 {
1628         inc_type_visited();
1629
1630         entity_t *entity = unit->scope.entities;
1631         for ( ; entity != NULL; entity = entity->base.next) {
1632                 if (entity->kind == ENTITY_ENUM_VALUE)
1633                         continue;
1634                 if (entity->base.namespc != NAMESPACE_NORMAL
1635                                 && entity->base.symbol == NULL)
1636                         continue;
1637                 if (is_generated_entity(entity))
1638                         continue;
1639
1640                 print_indent();
1641                 print_entity(entity);
1642                 fputc('\n', out);
1643         }
1644 }
1645
1646 bool is_constant_initializer(const initializer_t *initializer)
1647 {
1648         switch (initializer->kind) {
1649         case INITIALIZER_STRING:
1650         case INITIALIZER_WIDE_STRING:
1651         case INITIALIZER_DESIGNATOR:
1652                 return true;
1653
1654         case INITIALIZER_VALUE:
1655                 return is_constant_expression(initializer->value.value);
1656
1657         case INITIALIZER_LIST:
1658                 for(size_t i = 0; i < initializer->list.len; ++i) {
1659                         initializer_t *sub_initializer = initializer->list.initializers[i];
1660                         if(!is_constant_initializer(sub_initializer))
1661                                 return false;
1662                 }
1663                 return true;
1664         }
1665         panic("invalid initializer kind found");
1666 }
1667
1668 static bool is_object_with_linker_constant_address(const expression_t *expression)
1669 {
1670         switch (expression->kind) {
1671         case EXPR_UNARY_DEREFERENCE:
1672                 return is_address_constant(expression->unary.value);
1673
1674         case EXPR_SELECT: {
1675                 type_t *base_type = skip_typeref(expression->select.compound->base.type);
1676                 if(is_type_pointer(base_type)) {
1677                         /* it's a -> */
1678                         return is_address_constant(expression->select.compound);
1679                 } else {
1680                         return is_object_with_linker_constant_address(expression->select.compound);
1681                 }
1682         }
1683
1684         case EXPR_ARRAY_ACCESS:
1685                 return is_constant_expression(expression->array_access.index)
1686                         && is_address_constant(expression->array_access.array_ref);
1687
1688         case EXPR_REFERENCE: {
1689                 entity_t *entity = expression->reference.entity;
1690                 if (is_declaration(entity)) {
1691                         switch ((storage_class_tag_t) entity->declaration.storage_class) {
1692                         case STORAGE_CLASS_NONE:
1693                         case STORAGE_CLASS_EXTERN:
1694                         case STORAGE_CLASS_STATIC:
1695                                 return true;
1696
1697                         case STORAGE_CLASS_REGISTER:
1698                         case STORAGE_CLASS_TYPEDEF:
1699                         case STORAGE_CLASS_AUTO:
1700                         case STORAGE_CLASS_THREAD:
1701                         case STORAGE_CLASS_THREAD_EXTERN:
1702                         case STORAGE_CLASS_THREAD_STATIC:
1703                                 break;
1704                         }
1705                 }
1706                 return false;
1707         }
1708
1709         default:
1710                 return false;
1711         }
1712 }
1713
1714 bool is_address_constant(const expression_t *expression)
1715 {
1716         switch (expression->kind) {
1717         case EXPR_UNARY_TAKE_ADDRESS:
1718                 return is_object_with_linker_constant_address(expression->unary.value);
1719
1720         case EXPR_UNARY_DEREFERENCE: {
1721                 type_t *real_type
1722                         = revert_automatic_type_conversion(expression->unary.value);
1723                 /* dereferencing a function is a NOP */
1724                 if(is_type_function(real_type)) {
1725                         return is_address_constant(expression->unary.value);
1726                 }
1727
1728                 /* fallthrough */
1729         }
1730
1731         case EXPR_UNARY_CAST: {
1732                 type_t *dest = skip_typeref(expression->base.type);
1733                 if (!is_type_pointer(dest) && (
1734                         dest->kind != TYPE_ATOMIC                                               ||
1735                         !(get_atomic_type_flags(dest->atomic.akind) & ATOMIC_TYPE_FLAG_INTEGER) ||
1736                         (get_atomic_type_size(dest->atomic.akind) < get_atomic_type_size(get_intptr_kind())
1737                     )))
1738                         return false;
1739
1740                 return (is_constant_expression(expression->unary.value)
1741                         || is_address_constant(expression->unary.value));
1742         }
1743
1744         case EXPR_BINARY_ADD:
1745         case EXPR_BINARY_SUB: {
1746                 expression_t *left  = expression->binary.left;
1747                 expression_t *right = expression->binary.right;
1748
1749                 if(is_type_pointer(skip_typeref(left->base.type))) {
1750                         return is_address_constant(left) && is_constant_expression(right);
1751                 } else if(is_type_pointer(skip_typeref(right->base.type))) {
1752                         return is_constant_expression(left)     && is_address_constant(right);
1753                 }
1754
1755                 return false;
1756         }
1757
1758         case EXPR_REFERENCE: {
1759                 entity_t *entity = expression->reference.entity;
1760                 if (!is_declaration(entity))
1761                         return false;
1762
1763                 type_t *type = skip_typeref(entity->declaration.type);
1764                 if(is_type_function(type))
1765                         return true;
1766                 if(is_type_array(type)) {
1767                         return is_object_with_linker_constant_address(expression);
1768                 }
1769                 /* Prevent stray errors */
1770                 if (!is_type_valid(type))
1771                         return true;
1772                 return false;
1773         }
1774
1775         case EXPR_ARRAY_ACCESS: {
1776                 type_t *const type =
1777                         skip_typeref(revert_automatic_type_conversion(expression));
1778                 return
1779                         is_type_array(type)                                    &&
1780                         is_constant_expression(expression->array_access.index) &&
1781                         is_address_constant(expression->array_access.array_ref);
1782         }
1783
1784         default:
1785                 return false;
1786         }
1787 }
1788
1789 static bool is_builtin_const_call(const expression_t *expression)
1790 {
1791         expression_t *function = expression->call.function;
1792         if (function->kind != EXPR_BUILTIN_SYMBOL) {
1793                 return false;
1794         }
1795
1796         symbol_t *symbol = function->builtin_symbol.symbol;
1797
1798         switch (symbol->ID) {
1799         case T___builtin_huge_val:
1800         case T___builtin_inf:
1801         case T___builtin_inff:
1802         case T___builtin_infl:
1803         case T___builtin_nan:
1804         case T___builtin_nanf:
1805         case T___builtin_nanl:
1806                 return true;
1807         }
1808
1809         return false;
1810 }
1811
1812 static bool is_constant_pointer(const expression_t *expression)
1813 {
1814         if (is_constant_expression(expression))
1815                 return true;
1816
1817         switch (expression->kind) {
1818         case EXPR_UNARY_CAST:
1819                 return is_constant_pointer(expression->unary.value);
1820         default:
1821                 return false;
1822         }
1823 }
1824
1825 static bool is_object_with_constant_address(const expression_t *expression)
1826 {
1827         switch (expression->kind) {
1828         case EXPR_SELECT: {
1829                 expression_t *compound      = expression->select.compound;
1830                 type_t       *compound_type = compound->base.type;
1831                 compound_type = skip_typeref(compound_type);
1832                 if(is_type_pointer(compound_type)) {
1833                         return is_constant_pointer(compound);
1834                 } else {
1835                         return is_object_with_constant_address(compound);
1836                 }
1837         }
1838
1839         case EXPR_ARRAY_ACCESS: {
1840                 array_access_expression_t const* const array_access =
1841                         &expression->array_access;
1842                 return
1843                         is_constant_expression(array_access->index) && (
1844                                 is_object_with_constant_address(array_access->array_ref) ||
1845                                 is_constant_pointer(array_access->array_ref)
1846                         );
1847         }
1848
1849         case EXPR_UNARY_DEREFERENCE:
1850                 return is_constant_pointer(expression->unary.value);
1851         default:
1852                 return false;
1853         }
1854 }
1855
1856 bool is_constant_expression(const expression_t *expression)
1857 {
1858         switch (expression->kind) {
1859
1860         case EXPR_CONST:
1861         case EXPR_CHARACTER_CONSTANT:
1862         case EXPR_WIDE_CHARACTER_CONSTANT:
1863         case EXPR_STRING_LITERAL:
1864         case EXPR_WIDE_STRING_LITERAL:
1865         case EXPR_CLASSIFY_TYPE:
1866         case EXPR_FUNCNAME:
1867         case EXPR_OFFSETOF:
1868         case EXPR_ALIGNOF:
1869         case EXPR_BUILTIN_CONSTANT_P:
1870         case EXPR_LABEL_ADDRESS:
1871         case EXPR_REFERENCE_ENUM_VALUE:
1872                 return true;
1873
1874         case EXPR_SIZEOF: {
1875                 type_t *type = expression->typeprop.type;
1876                 if (type == NULL)
1877                         type = expression->typeprop.tp_expression->base.type;
1878
1879                 type = skip_typeref(type);
1880                 if (is_type_array(type) && type->array.is_vla)
1881                         return false;
1882                 return true;
1883         }
1884
1885         case EXPR_BUILTIN_SYMBOL:
1886         case EXPR_BUILTIN_PREFETCH:
1887         case EXPR_SELECT:
1888         case EXPR_VA_START:
1889         case EXPR_VA_ARG:
1890         case EXPR_STATEMENT:
1891         case EXPR_REFERENCE:
1892         case EXPR_UNARY_POSTFIX_INCREMENT:
1893         case EXPR_UNARY_POSTFIX_DECREMENT:
1894         case EXPR_UNARY_PREFIX_INCREMENT:
1895         case EXPR_UNARY_PREFIX_DECREMENT:
1896         case EXPR_UNARY_ASSUME: /* has VOID type */
1897         case EXPR_UNARY_DEREFERENCE:
1898         case EXPR_UNARY_DELETE:
1899         case EXPR_UNARY_DELETE_ARRAY:
1900         case EXPR_UNARY_THROW:
1901         case EXPR_BINARY_ASSIGN:
1902         case EXPR_BINARY_MUL_ASSIGN:
1903         case EXPR_BINARY_DIV_ASSIGN:
1904         case EXPR_BINARY_MOD_ASSIGN:
1905         case EXPR_BINARY_ADD_ASSIGN:
1906         case EXPR_BINARY_SUB_ASSIGN:
1907         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
1908         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
1909         case EXPR_BINARY_BITWISE_AND_ASSIGN:
1910         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
1911         case EXPR_BINARY_BITWISE_OR_ASSIGN:
1912         case EXPR_BINARY_COMMA:
1913         case EXPR_ARRAY_ACCESS:
1914                 return false;
1915
1916         case EXPR_UNARY_TAKE_ADDRESS:
1917                 return is_object_with_constant_address(expression->unary.value);
1918
1919         case EXPR_CALL:
1920                 return is_builtin_const_call(expression);
1921
1922         case EXPR_UNARY_NEGATE:
1923         case EXPR_UNARY_PLUS:
1924         case EXPR_UNARY_BITWISE_NEGATE:
1925         case EXPR_UNARY_NOT:
1926                 return is_constant_expression(expression->unary.value);
1927
1928         case EXPR_UNARY_CAST:
1929         case EXPR_UNARY_CAST_IMPLICIT:
1930                 return is_type_arithmetic(skip_typeref(expression->base.type))
1931                         && is_constant_expression(expression->unary.value);
1932
1933         case EXPR_BINARY_ADD:
1934         case EXPR_BINARY_SUB:
1935         case EXPR_BINARY_MUL:
1936         case EXPR_BINARY_DIV:
1937         case EXPR_BINARY_MOD:
1938         case EXPR_BINARY_EQUAL:
1939         case EXPR_BINARY_NOTEQUAL:
1940         case EXPR_BINARY_LESS:
1941         case EXPR_BINARY_LESSEQUAL:
1942         case EXPR_BINARY_GREATER:
1943         case EXPR_BINARY_GREATEREQUAL:
1944         case EXPR_BINARY_BITWISE_AND:
1945         case EXPR_BINARY_BITWISE_OR:
1946         case EXPR_BINARY_BITWISE_XOR:
1947         case EXPR_BINARY_LOGICAL_AND:
1948         case EXPR_BINARY_LOGICAL_OR:
1949         case EXPR_BINARY_SHIFTLEFT:
1950         case EXPR_BINARY_SHIFTRIGHT:
1951         case EXPR_BINARY_BUILTIN_EXPECT:
1952         case EXPR_BINARY_ISGREATER:
1953         case EXPR_BINARY_ISGREATEREQUAL:
1954         case EXPR_BINARY_ISLESS:
1955         case EXPR_BINARY_ISLESSEQUAL:
1956         case EXPR_BINARY_ISLESSGREATER:
1957         case EXPR_BINARY_ISUNORDERED:
1958                 return is_constant_expression(expression->binary.left)
1959                         && is_constant_expression(expression->binary.right);
1960
1961         case EXPR_COMPOUND_LITERAL:
1962                 return is_constant_initializer(expression->compound_literal.initializer);
1963
1964         case EXPR_CONDITIONAL: {
1965                 expression_t *condition = expression->conditional.condition;
1966                 if(!is_constant_expression(condition))
1967                         return false;
1968
1969                 long val = fold_constant(condition);
1970                 if(val != 0)
1971                         return is_constant_expression(expression->conditional.true_expression);
1972                 else
1973                         return is_constant_expression(expression->conditional.false_expression);
1974         }
1975
1976         case EXPR_INVALID:
1977                 return true;
1978
1979         case EXPR_UNKNOWN:
1980                 break;
1981         }
1982         panic("invalid expression found (is constant expression)");
1983 }
1984
1985 /**
1986  * Initialize the AST construction.
1987  */
1988 void init_ast(void)
1989 {
1990         obstack_init(&ast_obstack);
1991 }
1992
1993 /**
1994  * Free the AST.
1995  */
1996 void exit_ast(void)
1997 {
1998         obstack_free(&ast_obstack, NULL);
1999 }
2000
2001 /**
2002  * Set the output stream for the AST printer.
2003  *
2004  * @param stream  the output stream
2005  */
2006 void ast_set_output(FILE *stream)
2007 {
2008         out = stream;
2009         type_set_output(stream);
2010 }
2011
2012 /**
2013  * Allocate an AST object of the given size.
2014  *
2015  * @param size  the size of the object to allocate
2016  *
2017  * @return  A new allocated object in the AST memeory space.
2018  */
2019 void *(allocate_ast)(size_t size)
2020 {
2021         return _allocate_ast(size);
2022 }