gcc/c-pretty-print.c

   1 /* Subroutines common to both C and C++ pretty-printers.
   2    Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
   3    Contributed by Gabriel Dos Reis <gdr@integrable-solutions.net>
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 2, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING.  If not, write to the Free
  19 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
  20 02110-1301, USA.  */
  21
  22 #include "config.h"
  23 #include "system.h"
  24 #include "coretypes.h"
  25 #include "tm.h"
  26 #include "real.h"
  27 #include "c-pretty-print.h"
  28 #include "c-tree.h"
  29 #include "tree-iterator.h"
  30 #include "diagnostic.h"
  31
  32 /* The pretty-printer code is primarily designed to closely follow
  33    (GNU) C and C++ grammars.  That is to be contrasted with spaghetti
  34    codes we used to have in the past.  Following a structured
  35    approach (preferably the official grammars) is believed to make it
  36    much easier to add extensions and nifty pretty-printing effects that
  37    takes expression or declaration contexts into account.  */
  38
  39
  40 #define pp_c_maybe_whitespace(PP)            \
  41    do {                                      \
  42      if (pp_base (PP)->padding == pp_before) \
  43        pp_c_whitespace (PP);                 \
  44    } while (0)
  45
  46 /* literal  */
  47 static void pp_c_char (c_pretty_printer *, int);
  48
  49 /* postfix-expression  */
  50 static void pp_c_initializer_list (c_pretty_printer *, tree);
  51 static void pp_c_brace_enclosed_initializer_list (c_pretty_printer *, tree);
  52
  53 static void pp_c_multiplicative_expression (c_pretty_printer *, tree);
  54 static void pp_c_additive_expression (c_pretty_printer *, tree);
  55 static void pp_c_shift_expression (c_pretty_printer *, tree);
  56 static void pp_c_relational_expression (c_pretty_printer *, tree);
  57 static void pp_c_equality_expression (c_pretty_printer *, tree);
  58 static void pp_c_and_expression (c_pretty_printer *, tree);
  59 static void pp_c_exclusive_or_expression (c_pretty_printer *, tree);
  60 static void pp_c_inclusive_or_expression (c_pretty_printer *, tree);
  61 static void pp_c_logical_and_expression (c_pretty_printer *, tree);
  62 static void pp_c_conditional_expression (c_pretty_printer *, tree);
  63 static void pp_c_assignment_expression (c_pretty_printer *, tree);
  64
  65 /* declarations.  */
  66
  67 \f
  68 /* Helper functions.  */
  69
  70 void
  71 pp_c_whitespace (c_pretty_printer *pp)
  72 {
  73   pp_space (pp);
  74   pp_base (pp)->padding = pp_none;
  75 }
  76
  77 void
  78 pp_c_left_paren (c_pretty_printer *pp)
  79 {
  80   pp_left_paren (pp);
  81   pp_base (pp)->padding = pp_none;
  82 }
  83
  84 void
  85 pp_c_right_paren (c_pretty_printer *pp)
  86 {
  87   pp_right_paren (pp);
  88   pp_base (pp)->padding = pp_none;
  89 }
  90
  91 void
  92 pp_c_left_brace (c_pretty_printer *pp)
  93 {
  94   pp_left_brace (pp);
  95   pp_base (pp)->padding = pp_none;
  96 }
  97
  98 void
  99 pp_c_right_brace (c_pretty_printer *pp)
 100 {
 101   pp_right_brace (pp);
 102   pp_base (pp)->padding = pp_none;
 103 }
 104
 105 void
 106 pp_c_left_bracket (c_pretty_printer *pp)
 107 {
 108   pp_left_bracket (pp);
 109   pp_base (pp)->padding = pp_none;
 110 }
 111
 112 void
 113 pp_c_right_bracket (c_pretty_printer *pp)
 114 {
 115   pp_right_bracket (pp);
 116   pp_base (pp)->padding = pp_none;
 117 }
 118
 119 void
 120 pp_c_dot (c_pretty_printer *pp)
 121 {
 122   pp_dot (pp);
 123   pp_base (pp)->padding = pp_none;
 124 }
 125
 126 void
 127 pp_c_ampersand (c_pretty_printer *pp)
 128 {
 129   pp_ampersand (pp);
 130   pp_base (pp)->padding = pp_none;
 131 }
 132
 133 void
 134 pp_c_star (c_pretty_printer *pp)
 135 {
 136   pp_star (pp);
 137   pp_base (pp)->padding = pp_none;
 138 }
 139
 140 void
 141 pp_c_arrow (c_pretty_printer *pp)
 142 {
 143   pp_arrow (pp);
 144   pp_base (pp)->padding = pp_none;
 145 }
 146
 147 void
 148 pp_c_semicolon (c_pretty_printer *pp)
 149 {
 150   pp_semicolon (pp);
 151   pp_base (pp)->padding = pp_none;
 152 }
 153
 154 void
 155 pp_c_complement (c_pretty_printer *pp)
 156 {
 157   pp_complement (pp);
 158   pp_base (pp)->padding = pp_none;
 159 }
 160
 161 void
 162 pp_c_exclamation (c_pretty_printer *pp)
 163 {
 164   pp_exclamation (pp);
 165   pp_base (pp)->padding = pp_none;
 166 }
 167
 168 /* Print out the external representation of CV-QUALIFIER.  */
 169
 170 static void
 171 pp_c_cv_qualifier (c_pretty_printer *pp, const char *cv)
 172 {
 173   const char *p = pp_last_position_in_text (pp);
 174   /* The C programming language does not have references, but it is much
 175      simpler to handle those here rather than going through the same
 176      logic in the C++ pretty-printer.  */
 177   if (p != NULL && (*p == '*' || *p == '&'))
 178     pp_c_whitespace (pp);
 179   pp_c_identifier (pp, cv);
 180 }
 181
 182 /* Pretty-print T using the type-cast notation '( type-name )'.  */
 183
 184 static void
 185 pp_c_type_cast (c_pretty_printer *pp, tree t)
 186 {
 187   pp_c_left_paren (pp);
 188   pp_type_id (pp, t);
 189   pp_c_right_paren (pp);
 190 }
 191
 192 /* We're about to pretty-print a pointer type as indicated by T.
 193    Output a whitespace, if needed, preparing for subsequent output.  */
 194
 195 void
 196 pp_c_space_for_pointer_operator (c_pretty_printer *pp, tree t)
 197 {
 198   if (POINTER_TYPE_P (t))
 199     {
 200       tree pointee = strip_pointer_operator (TREE_TYPE (t));
 201       if (TREE_CODE (pointee) != ARRAY_TYPE
 202           && TREE_CODE (pointee) != FUNCTION_TYPE)
 203         pp_c_whitespace (pp);
 204     }
 205 }
 206
 207 \f
 208 /* Declarations.  */
 209
 210 /* C++ cv-qualifiers are called type-qualifiers in C.  Print out the
 211    cv-qualifiers of T.  If T is a declaration then it is the cv-qualifier
 212    of its type.  Take care of possible extensions.
 213
 214    type-qualifier-list:
 215        type-qualifier
 216        type-qualifier-list type-qualifier
 217
 218    type-qualifier:
 219        const
 220        restrict                              -- C99
 221        __restrict__                          -- GNU C
 222        volatile    */
 223
 224 void
 225 pp_c_type_qualifier_list (c_pretty_printer *pp, tree t)
 226 {
 227    int qualifiers;
 228
 229   if (!TYPE_P (t))
 230     t = TREE_TYPE (t);
 231
 232   qualifiers = TYPE_QUALS (t);
 233   if (qualifiers & TYPE_QUAL_CONST)
 234     pp_c_cv_qualifier (pp, "const");
 235   if (qualifiers & TYPE_QUAL_VOLATILE)
 236     pp_c_cv_qualifier (pp, "volatile");
 237   if (qualifiers & TYPE_QUAL_RESTRICT)
 238     pp_c_cv_qualifier (pp, flag_isoc99 ? "restrict" : "__restrict__");
 239 }
 240
 241 /* pointer:
 242       * type-qualifier-list(opt)
 243       * type-qualifier-list(opt) pointer  */
 244
 245 static void
 246 pp_c_pointer (c_pretty_printer *pp, tree t)
 247 {
 248   if (!TYPE_P (t) && TREE_CODE (t) != TYPE_DECL)
 249     t = TREE_TYPE (t);
 250   switch (TREE_CODE (t))
 251     {
 252     case POINTER_TYPE:
 253       /* It is easier to handle C++ reference types here.  */
 254     case REFERENCE_TYPE:
 255       if (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE)
 256         pp_c_pointer (pp, TREE_TYPE (t));
 257       if (TREE_CODE (t) == POINTER_TYPE)
 258         pp_c_star (pp);
 259       else
 260         pp_c_ampersand (pp);
 261       pp_c_type_qualifier_list (pp, t);
 262       break;
 263
 264       /* ??? This node is now in GENERIC and so shouldn't be here.  But
 265          we'll fix that later.  */
 266     case DECL_EXPR:
 267       pp_declaration (pp, DECL_EXPR_DECL (t));
 268       pp_needs_newline (pp) = true;
 269       break;
 270
 271     default:
 272       pp_unsupported_tree (pp, t);
 273     }
 274 }
 275
 276 /* type-specifier:
 277       void
 278       char
 279       short
 280       int
 281       long
 282       float
 283       double
 284       signed
 285       unsigned
 286       _Bool                          -- C99
 287       _Complex                       -- C99
 288       _Imaginary                     -- C99
 289       struct-or-union-specifier
 290       enum-specifier
 291       typedef-name.
 292
 293   GNU extensions.
 294   simple-type-specifier:
 295       __complex__
 296       __vector__   */
 297
 298 void
 299 pp_c_type_specifier (c_pretty_printer *pp, tree t)
 300 {
 301   const enum tree_code code = TREE_CODE (t);
 302   switch (code)
 303     {
 304     case ERROR_MARK:
 305       pp_c_identifier (pp, "<type-error>");
 306       break;
 307
 308     case IDENTIFIER_NODE:
 309       pp_c_tree_decl_identifier (pp, t);
 310       break;
 311
 312     case VOID_TYPE:
 313     case BOOLEAN_TYPE:
 314     case INTEGER_TYPE:
 315     case REAL_TYPE:
 316       if (TYPE_NAME (t))
 317         {
 318           t = TYPE_NAME (t);
 319           pp_c_type_specifier (pp, t);
 320         }
 321       else
 322         {
 323           int prec = TYPE_PRECISION (t);
 324           t = c_common_type_for_mode (TYPE_MODE (t), TYPE_UNSIGNED (t));
 325           if (TYPE_NAME (t))
 326             {
 327               pp_c_type_specifier (pp, t);
 328               if (TYPE_PRECISION (t) != prec)
 329                 {
 330                   pp_string (pp, ":");
 331                   pp_decimal_int (pp, prec);
 332                 }
 333             }
 334           else
 335             {
 336               switch (code)
 337                 {
 338                 case INTEGER_TYPE:
 339                   pp_string (pp, (TYPE_UNSIGNED (t)
 340                                   ? "<unnamed-unsigned:"
 341                                   : "<unnamed-signed:"));
 342                   break;
 343                 case REAL_TYPE:
 344                   pp_string (pp, "<unnamed-float:");
 345                   break;
 346                 default:
 347                   gcc_unreachable ();
 348                 }
 349               pp_decimal_int (pp, prec);
 350               pp_string (pp, ">");
 351             }
 352         }
 353       break;
 354
 355     case TYPE_DECL:
 356       if (DECL_NAME (t))
 357         pp_id_expression (pp, t);
 358       else
 359         pp_c_identifier (pp, "<typedef-error>");
 360       break;
 361
 362     case UNION_TYPE:
 363     case RECORD_TYPE:
 364     case ENUMERAL_TYPE:
 365       if (code == UNION_TYPE)
 366         pp_c_identifier (pp, "union");
 367       else if (code == RECORD_TYPE)
 368         pp_c_identifier (pp, "struct");
 369       else if (code == ENUMERAL_TYPE)
 370         pp_c_identifier (pp, "enum");
 371       else
 372         pp_c_identifier (pp, "<tag-error>");
 373
 374       if (TYPE_NAME (t))
 375         pp_id_expression (pp, TYPE_NAME (t));
 376       else
 377         pp_c_identifier (pp, "<anonymous>");
 378       break;
 379
 380     default:
 381       pp_unsupported_tree (pp, t);
 382       break;
 383     }
 384 }
 385
 386 /* specifier-qualifier-list:
 387       type-specifier specifier-qualifier-list-opt
 388       type-qualifier specifier-qualifier-list-opt
 389
 390
 391   Implementation note:  Because of the non-linearities in array or
 392   function declarations, this routine prints not just the
 393   specifier-qualifier-list of such entities or types of such entities,
 394   but also the 'pointer' production part of their declarators.  The
 395   remaining part is done by pp_declarator or pp_c_abstract_declarator.  */
 396
 397 void
 398 pp_c_specifier_qualifier_list (c_pretty_printer *pp, tree t)
 399 {
 400   const enum tree_code code = TREE_CODE (t);
 401
 402   if (TREE_CODE (t) != POINTER_TYPE)
 403     pp_c_type_qualifier_list (pp, t);
 404   switch (code)
 405     {
 406     case REFERENCE_TYPE:
 407     case POINTER_TYPE:
 408       {
 409         /* Get the types-specifier of this type.  */
 410         tree pointee = strip_pointer_operator (TREE_TYPE (t));
 411         pp_c_specifier_qualifier_list (pp, pointee);
 412         if (TREE_CODE (pointee) == ARRAY_TYPE
 413             || TREE_CODE (pointee) == FUNCTION_TYPE)
 414           {
 415             pp_c_whitespace (pp);
 416             pp_c_left_paren (pp);
 417           }
 418         else if (!c_dialect_cxx ())
 419           pp_c_whitespace (pp);
 420         pp_ptr_operator (pp, t);
 421       }
 422       break;
 423
 424     case FUNCTION_TYPE:
 425     case ARRAY_TYPE:
 426       pp_c_specifier_qualifier_list (pp, TREE_TYPE (t));
 427       break;
 428
 429     case VECTOR_TYPE:
 430     case COMPLEX_TYPE:
 431       pp_c_specifier_qualifier_list (pp, TREE_TYPE (t));
 432       if (code == COMPLEX_TYPE)
 433         pp_c_identifier (pp, flag_isoc99 ? "_Complex" : "__complex__");
 434       else if (code == VECTOR_TYPE)
 435         pp_c_identifier (pp, "__vector__");
 436       break;
 437
 438     default:
 439       pp_simple_type_specifier (pp, t);
 440       break;
 441     }
 442 }
 443
 444 /* parameter-type-list:
 445       parameter-list
 446       parameter-list , ...
 447
 448    parameter-list:
 449       parameter-declaration
 450       parameter-list , parameter-declaration
 451
 452    parameter-declaration:
 453       declaration-specifiers declarator
 454       declaration-specifiers abstract-declarator(opt)   */
 455
 456 void
 457 pp_c_parameter_type_list (c_pretty_printer *pp, tree t)
 458 {
 459   bool want_parm_decl = DECL_P (t) && !(pp->flags & pp_c_flag_abstract);
 460   tree parms = want_parm_decl ? DECL_ARGUMENTS (t) :  TYPE_ARG_TYPES (t);
 461   pp_c_left_paren (pp);
 462   if (parms == void_list_node)
 463     pp_c_identifier (pp, "void");
 464   else
 465     {
 466       bool first = true;
 467       for ( ; parms && parms != void_list_node; parms = TREE_CHAIN (parms))
 468         {
 469           if (!first)
 470             pp_separate_with (pp, ',');
 471           first = false;
 472           pp_declaration_specifiers
 473             (pp, want_parm_decl ? parms : TREE_VALUE (parms));
 474           if (want_parm_decl)
 475             pp_declarator (pp, parms);
 476           else
 477             pp_abstract_declarator (pp, TREE_VALUE (parms));
 478         }
 479     }
 480   pp_c_right_paren (pp);
 481 }
 482
 483 /* abstract-declarator:
 484       pointer
 485       pointer(opt) direct-abstract-declarator  */
 486
 487 static void
 488 pp_c_abstract_declarator (c_pretty_printer *pp, tree t)
 489 {
 490   if (TREE_CODE (t) == POINTER_TYPE)
 491     {
 492       if (TREE_CODE (TREE_TYPE (t)) == ARRAY_TYPE
 493           || TREE_CODE (TREE_TYPE (t)) == FUNCTION_TYPE)
 494         pp_c_right_paren (pp);
 495       t = TREE_TYPE (t);
 496     }
 497
 498   pp_direct_abstract_declarator (pp, t);
 499 }
 500
 501 /* direct-abstract-declarator:
 502       ( abstract-declarator )
 503       direct-abstract-declarator(opt) [ assignment-expression(opt) ]
 504       direct-abstract-declarator(opt) [ * ]
 505       direct-abstract-declarator(opt) ( parameter-type-list(opt) )  */
 506
 507 void
 508 pp_c_direct_abstract_declarator (c_pretty_printer *pp, tree t)
 509 {
 510   switch (TREE_CODE (t))
 511     {
 512     case POINTER_TYPE:
 513       pp_abstract_declarator (pp, t);
 514       break;
 515
 516     case FUNCTION_TYPE:
 517       pp_c_parameter_type_list (pp, t);
 518       pp_direct_abstract_declarator (pp, TREE_TYPE (t));
 519       break;
 520
 521     case ARRAY_TYPE:
 522       pp_c_left_bracket (pp);
 523       if (TYPE_DOMAIN (t) && TYPE_MAX_VALUE (TYPE_DOMAIN (t)))
 524         {
 525           tree maxval = TYPE_MAX_VALUE (TYPE_DOMAIN (t));
 526           tree type = TREE_TYPE (maxval);
 527
 528           if (host_integerp (maxval, 0))
 529             pp_wide_integer (pp, tree_low_cst (maxval, 0) + 1);
 530           else
 531             pp_expression (pp, fold_build2 (PLUS_EXPR, type, maxval,
 532                                             build_int_cst (type, 1)));
 533         }
 534       pp_c_right_bracket (pp);
 535       pp_direct_abstract_declarator (pp, TREE_TYPE (t));
 536       break;
 537
 538     case IDENTIFIER_NODE:
 539     case VOID_TYPE:
 540     case BOOLEAN_TYPE:
 541     case INTEGER_TYPE:
 542     case REAL_TYPE:
 543     case ENUMERAL_TYPE:
 544     case RECORD_TYPE:
 545     case UNION_TYPE:
 546     case VECTOR_TYPE:
 547     case COMPLEX_TYPE:
 548     case TYPE_DECL:
 549       break;
 550
 551     default:
 552       pp_unsupported_tree (pp, t);
 553       break;
 554     }
 555 }
 556
 557 /* type-name:
 558       specifier-qualifier-list  abstract-declarator(opt)  */
 559
 560 void
 561 pp_c_type_id (c_pretty_printer *pp, tree t)
 562 {
 563   pp_c_specifier_qualifier_list (pp, t);
 564   pp_abstract_declarator (pp, t);
 565 }
 566
 567 /* storage-class-specifier:
 568       typedef
 569       extern
 570       static
 571       auto
 572       register  */
 573
 574 void
 575 pp_c_storage_class_specifier (c_pretty_printer *pp, tree t)
 576 {
 577   if (TREE_CODE (t) == TYPE_DECL)
 578     pp_c_identifier (pp, "typedef");
 579   else if (DECL_P (t))
 580     {
 581       if (DECL_REGISTER (t))
 582         pp_c_identifier (pp, "register");
 583       else if (TREE_STATIC (t) && TREE_CODE (t) == VAR_DECL)
 584         pp_c_identifier (pp, "static");
 585     }
 586 }
 587
 588 /* function-specifier:
 589       inline   */
 590
 591 void
 592 pp_c_function_specifier (c_pretty_printer *pp, tree t)
 593 {
 594   if (TREE_CODE (t) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (t))
 595     pp_c_identifier (pp, "inline");
 596 }
 597
 598 /* declaration-specifiers:
 599       storage-class-specifier declaration-specifiers(opt)
 600       type-specifier declaration-specifiers(opt)
 601       type-qualifier declaration-specifiers(opt)
 602       function-specifier declaration-specifiers(opt)  */
 603
 604 void
 605 pp_c_declaration_specifiers (c_pretty_printer *pp, tree t)
 606 {
 607   pp_storage_class_specifier (pp, t);
 608   pp_function_specifier (pp, t);
 609   pp_c_specifier_qualifier_list (pp, DECL_P (t) ?  TREE_TYPE (t) : t);
 610 }
 611
 612 /* direct-declarator
 613       identifier
 614       ( declarator )
 615       direct-declarator [ type-qualifier-list(opt) assignment-expression(opt) ]
 616       direct-declarator [ static type-qualifier-list(opt) assignment-expression(opt)]
 617       direct-declarator [ type-qualifier-list static assignment-expression ]
 618       direct-declarator [ type-qualifier-list * ]
 619       direct-declarator ( parameter-type-list )
 620       direct-declarator ( identifier-list(opt) )  */
 621
 622 void
 623 pp_c_direct_declarator (c_pretty_printer *pp, tree t)
 624 {
 625   switch (TREE_CODE (t))
 626     {
 627     case VAR_DECL:
 628     case PARM_DECL:
 629     case TYPE_DECL:
 630     case FIELD_DECL:
 631     case LABEL_DECL:
 632       pp_c_space_for_pointer_operator (pp, TREE_TYPE (t));
 633       pp_c_tree_decl_identifier (pp, t);
 634       break;
 635
 636     case ARRAY_TYPE:
 637     case POINTER_TYPE:
 638       pp_abstract_declarator (pp, TREE_TYPE (t));
 639       break;
 640
 641     case FUNCTION_TYPE:
 642       pp_parameter_list (pp, t);
 643       pp_abstract_declarator (pp, TREE_TYPE (t));
 644       break;
 645
 646     case FUNCTION_DECL:
 647       pp_c_space_for_pointer_operator (pp, TREE_TYPE (TREE_TYPE (t)));
 648       pp_c_tree_decl_identifier (pp, t);
 649       if (pp_c_base (pp)->flags & pp_c_flag_abstract)
 650         pp_abstract_declarator (pp, TREE_TYPE (t));
 651       else
 652         {
 653           pp_parameter_list (pp, t);
 654           pp_abstract_declarator (pp, TREE_TYPE (TREE_TYPE (t)));
 655         }
 656       break;
 657
 658     case INTEGER_TYPE:
 659     case REAL_TYPE:
 660     case ENUMERAL_TYPE:
 661     case UNION_TYPE:
 662     case RECORD_TYPE:
 663       break;
 664
 665     default:
 666       pp_unsupported_tree (pp, t);
 667       break;
 668     }
 669 }
 670
 671
 672 /* declarator:
 673       pointer(opt)  direct-declarator   */
 674
 675 void
 676 pp_c_declarator (c_pretty_printer *pp, tree t)
 677 {
 678   switch (TREE_CODE (t))
 679     {
 680     case INTEGER_TYPE:
 681     case REAL_TYPE:
 682     case ENUMERAL_TYPE:
 683     case UNION_TYPE:
 684     case RECORD_TYPE:
 685       break;
 686
 687     case VAR_DECL:
 688     case PARM_DECL:
 689     case FIELD_DECL:
 690     case ARRAY_TYPE:
 691     case FUNCTION_TYPE:
 692     case FUNCTION_DECL:
 693     case TYPE_DECL:
 694       pp_direct_declarator (pp, t);
 695     break;
 696
 697
 698     default:
 699       pp_unsupported_tree (pp, t);
 700       break;
 701     }
 702 }
 703
 704 /* declaration:
 705       declaration-specifiers init-declarator-list(opt) ;  */
 706
 707 void
 708 pp_c_declaration (c_pretty_printer *pp, tree t)
 709 {
 710   pp_declaration_specifiers (pp, t);
 711   pp_c_init_declarator (pp, t);
 712 }
 713
 714 /* Pretty-print ATTRIBUTES using GNU C extension syntax.  */
 715
 716 void
 717 pp_c_attributes (c_pretty_printer *pp, tree attributes)
 718 {
 719   if (attributes == NULL_TREE)
 720     return;
 721
 722   pp_c_identifier (pp, "__attribute__");
 723   pp_c_left_paren (pp);
 724   pp_c_left_paren (pp);
 725   for (; attributes != NULL_TREE; attributes = TREE_CHAIN (attributes))
 726     {
 727       pp_tree_identifier (pp, TREE_PURPOSE (attributes));
 728       if (TREE_VALUE (attributes))
 729         pp_c_call_argument_list (pp, TREE_VALUE (attributes));
 730
 731       if (TREE_CHAIN (attributes))
 732         pp_separate_with (pp, ',');
 733     }
 734   pp_c_right_paren (pp);
 735   pp_c_right_paren (pp);
 736 }
 737
 738 /* function-definition:
 739       declaration-specifiers declarator compound-statement  */
 740
 741 void
 742 pp_c_function_definition (c_pretty_printer *pp, tree t)
 743 {
 744   pp_declaration_specifiers (pp, t);
 745   pp_declarator (pp, t);
 746   pp_needs_newline (pp) = true;
 747   pp_statement (pp, DECL_SAVED_TREE (t));
 748   pp_newline (pp);
 749   pp_flush (pp);
 750 }
 751
 752 \f
 753 /* Expressions.  */
 754
 755 /* Print out a c-char.  This is called solely for characters which are
 756    in the *target* execution character set.  We ought to convert them
 757    back to the *host* execution character set before printing, but we
 758    have no way to do this at present.  A decent compromise is to print
 759    all characters as if they were in the host execution character set,
 760    and not attempt to recover any named escape characters, but render
 761    all unprintables as octal escapes.  If the host and target character
 762    sets are the same, this produces relatively readable output.  If they
 763    are not the same, strings may appear as gibberish, but that's okay
 764    (in fact, it may well be what the reader wants, e.g. if they are looking
 765    to see if conversion to the target character set happened correctly).
 766
 767    A special case: we need to prefix \, ", and ' with backslashes.  It is
 768    correct to do so for the *host*'s \, ", and ', because the rest of the
 769    file appears in the host character set.  */
 770
 771 static void
 772 pp_c_char (c_pretty_printer *pp, int c)
 773 {
 774   if (ISPRINT (c))
 775     {
 776       switch (c)
 777         {
 778         case '\\': pp_string (pp, "\\\\"); break;
 779         case '\'': pp_string (pp, "\\\'"); break;
 780         case '\"': pp_string (pp, "\\\""); break;
 781         default:   pp_character (pp, c);
 782         }
 783     }
 784   else
 785     pp_scalar (pp, "\\%03o", (unsigned) c);
 786 }
 787
 788 /* Print out a STRING literal.  */
 789
 790 void
 791 pp_c_string_literal (c_pretty_printer *pp, tree s)
 792 {
 793   const char *p = TREE_STRING_POINTER (s);
 794   int n = TREE_STRING_LENGTH (s) - 1;
 795   int i;
 796   pp_doublequote (pp);
 797   for (i = 0; i < n; ++i)
 798     pp_c_char (pp, p[i]);
 799   pp_doublequote (pp);
 800 }
 801
 802 /* Pretty-print an INTEGER literal.  */
 803
 804 static void
 805 pp_c_integer_constant (c_pretty_printer *pp, tree i)
 806 {
 807   tree type = TREE_TYPE (i);
 808
 809   if (TREE_INT_CST_HIGH (i) == 0)
 810     pp_wide_integer (pp, TREE_INT_CST_LOW (i));
 811   else
 812     {
 813       if (tree_int_cst_sgn (i) < 0)
 814         {
 815           pp_character (pp, '-');
 816           i = build_int_cst_wide (NULL_TREE,
 817                                   -TREE_INT_CST_LOW (i),
 818                                   ~TREE_INT_CST_HIGH (i)
 819                                   + !TREE_INT_CST_LOW (i));
 820         }
 821       sprintf (pp_buffer (pp)->digit_buffer,
 822                HOST_WIDE_INT_PRINT_DOUBLE_HEX,
 823                TREE_INT_CST_HIGH (i), TREE_INT_CST_LOW (i));
 824       pp_string (pp, pp_buffer (pp)->digit_buffer);
 825     }
 826   if (TYPE_UNSIGNED (type))
 827     pp_character (pp, 'u');
 828   if (type == long_integer_type_node || type == long_unsigned_type_node)
 829     pp_character (pp, 'l');
 830   else if (type == long_long_integer_type_node
 831            || type == long_long_unsigned_type_node)
 832     pp_string (pp, "ll");
 833 }
 834
 835 /* Print out a CHARACTER literal.  */
 836
 837 static void
 838 pp_c_character_constant (c_pretty_printer *pp, tree c)
 839 {
 840   tree type = TREE_TYPE (c);
 841   if (type == wchar_type_node)
 842     pp_character (pp, 'L');
 843   pp_quote (pp);
 844   if (host_integerp (c, TYPE_UNSIGNED (type)))
 845     pp_c_char (pp, tree_low_cst (c, TYPE_UNSIGNED (type)));
 846   else
 847     pp_scalar (pp, "\\x%x", (unsigned) TREE_INT_CST_LOW (c));
 848   pp_quote (pp);
 849 }
 850
 851 /* Print out a BOOLEAN literal.  */
 852
 853 static void
 854 pp_c_bool_constant (c_pretty_printer *pp, tree b)
 855 {
 856   if (b == boolean_false_node)
 857     {
 858       if (c_dialect_cxx ())
 859         pp_c_identifier (pp, "false");
 860       else if (flag_isoc99)
 861         pp_c_identifier (pp, "_False");
 862       else
 863         pp_unsupported_tree (pp, b);
 864     }
 865   else if (b == boolean_true_node)
 866     {
 867       if (c_dialect_cxx ())
 868         pp_c_identifier (pp, "true");
 869       else if (flag_isoc99)
 870         pp_c_identifier (pp, "_True");
 871       else
 872         pp_unsupported_tree (pp, b);
 873     }
 874   else if (TREE_CODE (b) == INTEGER_CST)
 875     pp_c_integer_constant (pp, b);
 876   else
 877     pp_unsupported_tree (pp, b);
 878 }
 879
 880 /* Attempt to print out an ENUMERATOR.  Return true on success.  Else return
 881    false; that means the value was obtained by a cast, in which case
 882    print out the type-id part of the cast-expression -- the casted value
 883    is then printed by pp_c_integer_literal.  */
 884
 885 static bool
 886 pp_c_enumeration_constant (c_pretty_printer *pp, tree e)
 887 {
 888   bool value_is_named = true;
 889   tree type = TREE_TYPE (e);
 890   tree value;
 891
 892   /* Find the name of this constant.  */
 893   for (value = TYPE_VALUES (type);
 894        value != NULL_TREE && !tree_int_cst_equal (TREE_VALUE (value), e);
 895        value = TREE_CHAIN (value))
 896     ;
 897
 898   if (value != NULL_TREE)
 899     pp_id_expression (pp, TREE_PURPOSE (value));
 900   else
 901     {
 902       /* Value must have been cast.  */
 903       pp_c_type_cast (pp, type);
 904       value_is_named = false;
 905     }
 906
 907   return value_is_named;
 908 }
 909
 910 /* Print out a REAL value as a decimal-floating-constant.  */
 911
 912 static void
 913 pp_c_floating_constant (c_pretty_printer *pp, tree r)
 914 {
 915   real_to_decimal (pp_buffer (pp)->digit_buffer, &TREE_REAL_CST (r),
 916                    sizeof (pp_buffer (pp)->digit_buffer), 0, 1);
 917   pp_string (pp, pp_buffer(pp)->digit_buffer);
 918   if (TREE_TYPE (r) == float_type_node)
 919     pp_character (pp, 'f');
 920   else if (TREE_TYPE (r) == long_double_type_node)
 921     pp_character (pp, 'l');
 922   else if (TREE_TYPE (r) == dfloat128_type_node)
 923     pp_string (pp, "dl");
 924   else if (TREE_TYPE (r) == dfloat64_type_node)
 925     pp_string (pp, "dd");
 926   else if (TREE_TYPE (r) == dfloat32_type_node)
 927     pp_string (pp, "df");
 928 }
 929
 930 /* Pretty-print a compound literal expression.  GNU extensions include
 931    vector constants.  */
 932
 933 static void
 934 pp_c_compound_literal (c_pretty_printer *pp, tree e)
 935 {
 936   tree type = TREE_TYPE (e);
 937   pp_c_type_cast (pp, type);
 938
 939   switch (TREE_CODE (type))
 940     {
 941     case RECORD_TYPE:
 942     case UNION_TYPE:
 943     case ARRAY_TYPE:
 944     case VECTOR_TYPE:
 945     case COMPLEX_TYPE:
 946       pp_c_brace_enclosed_initializer_list (pp, e);
 947       break;
 948
 949     default:
 950       pp_unsupported_tree (pp, e);
 951       break;
 952     }
 953 }
 954
 955 /* constant:
 956       integer-constant
 957       floating-constant
 958       enumeration-constant
 959       character-constant   */
 960
 961 void
 962 pp_c_constant (c_pretty_printer *pp, tree e)
 963 {
 964   const enum tree_code code = TREE_CODE (e);
 965
 966   switch (code)
 967     {
 968     case INTEGER_CST:
 969       {
 970         tree type = TREE_TYPE (e);
 971         if (type == boolean_type_node)
 972           pp_c_bool_constant (pp, e);
 973         else if (type == char_type_node)
 974           pp_c_character_constant (pp, e);
 975         else if (TREE_CODE (type) == ENUMERAL_TYPE
 976                  && pp_c_enumeration_constant (pp, e))
 977           ;
 978         else
 979           pp_c_integer_constant (pp, e);
 980       }
 981       break;
 982
 983     case REAL_CST:
 984       pp_c_floating_constant (pp, e);
 985       break;
 986
 987     case STRING_CST:
 988       pp_c_string_literal (pp, e);
 989       break;
 990
 991     default:
 992       pp_unsupported_tree (pp, e);
 993       break;
 994     }
 995 }
 996
 997 /* Pretty-print an IDENTIFIER_NODE, preceded by whitespace is necessary.  */
 998
 999 void
1000 pp_c_identifier (c_pretty_printer *pp, const char *id)
1001 {
1002   pp_c_maybe_whitespace (pp);
1003   pp_identifier (pp, id);
1004   pp_base (pp)->padding = pp_before;
1005 }
1006
1007 /* Pretty-print a C primary-expression.
1008    primary-expression:
1009       identifier
1010       constant
1011       string-literal
1012       ( expression )   */
1013
1014 void
1015 pp_c_primary_expression (c_pretty_printer *pp, tree e)
1016 {
1017   switch (TREE_CODE (e))
1018     {
1019     case VAR_DECL:
1020     case PARM_DECL:
1021     case FIELD_DECL:
1022     case CONST_DECL:
1023     case FUNCTION_DECL:
1024     case LABEL_DECL:
1025       pp_c_tree_decl_identifier (pp, e);
1026       break;
1027
1028     case IDENTIFIER_NODE:
1029       pp_c_tree_identifier (pp, e);
1030       break;
1031
1032     case ERROR_MARK:
1033       pp_c_identifier (pp, "<erroneous-expression>");
1034       break;
1035
1036     case RESULT_DECL:
1037       pp_c_identifier (pp, "<return-value>");
1038       break;
1039
1040     case INTEGER_CST:
1041     case REAL_CST:
1042     case STRING_CST:
1043       pp_c_constant (pp, e);
1044       break;
1045
1046     case TARGET_EXPR:
1047       pp_c_identifier (pp, "__builtin_memcpy");
1048       pp_c_left_paren (pp);
1049       pp_ampersand (pp);
1050       pp_primary_expression (pp, TREE_OPERAND (e, 0));
1051       pp_separate_with (pp, ',');
1052       pp_ampersand (pp);
1053       pp_initializer (pp, TREE_OPERAND (e, 1));
1054       if (TREE_OPERAND (e, 2))
1055         {
1056           pp_separate_with (pp, ',');
1057           pp_c_expression (pp, TREE_OPERAND (e, 2));
1058         }
1059       pp_c_right_paren (pp);
1060       break;
1061
1062     default:
1063       /* FIXME:  Make sure we won't get into an infinie loop.  */
1064       pp_c_left_paren (pp);
1065       pp_expression (pp, e);
1066       pp_c_right_paren (pp);
1067       break;
1068     }
1069 }
1070
1071 /* Print out a C initializer -- also support C compound-literals.
1072    initializer:
1073       assignment-expression:
1074       { initializer-list }
1075       { initializer-list , }   */
1076
1077 static void
1078 pp_c_initializer (c_pretty_printer *pp, tree e)
1079 {
1080   if (TREE_CODE (e) == CONSTRUCTOR)
1081     pp_c_brace_enclosed_initializer_list (pp, e);
1082   else
1083     pp_expression (pp, e);
1084 }
1085
1086 /* init-declarator:
1087       declarator:
1088       declarator = initializer   */
1089
1090 void
1091 pp_c_init_declarator (c_pretty_printer *pp, tree t)
1092 {
1093   pp_declarator (pp, t);
1094   /* We don't want to output function definitions here.  There are handled
1095      elsewhere (and the syntactic form is bogus anyway).  */
1096   if (TREE_CODE (t) != FUNCTION_DECL && DECL_INITIAL (t))
1097     {
1098       tree init = DECL_INITIAL (t);
1099       /* This C++ bit is handled here because it is easier to do so.
1100          In templates, the C++ parser builds a TREE_LIST for a
1101          direct-initialization; the TREE_PURPOSE is the variable to
1102          initialize and the TREE_VALUE is the initializer.  */
1103       if (TREE_CODE (init) == TREE_LIST)
1104         {
1105           pp_c_left_paren (pp);
1106           pp_expression (pp, TREE_VALUE (init));
1107           pp_right_paren (pp);
1108         }
1109       else
1110         {
1111           pp_space (pp);
1112           pp_equal (pp);
1113           pp_space (pp);
1114           pp_c_initializer (pp, init);
1115         }
1116     }
1117 }
1118
1119 /* initializer-list:
1120       designation(opt) initializer
1121       initializer-list , designation(opt) initializer
1122
1123    designation:
1124       designator-list =
1125
1126    designator-list:
1127       designator
1128       designator-list designator
1129
1130    designator:
1131       [ constant-expression ]
1132       identifier   */
1133
1134 static void
1135 pp_c_initializer_list (c_pretty_printer *pp, tree e)
1136 {
1137   tree type = TREE_TYPE (e);
1138   const enum tree_code code = TREE_CODE (type);
1139
1140   switch (code)
1141     {
1142     case RECORD_TYPE:
1143     case UNION_TYPE:
1144     case ARRAY_TYPE:
1145       {
1146         tree init = TREE_OPERAND (e, 0);
1147         for (; init != NULL_TREE; init = TREE_CHAIN (init))
1148           {
1149             if (code == RECORD_TYPE || code == UNION_TYPE)
1150               {
1151                 pp_c_dot (pp);
1152                 pp_c_primary_expression (pp, TREE_PURPOSE (init));
1153               }
1154             else
1155               {
1156                 pp_c_left_bracket (pp);
1157                 if (TREE_PURPOSE (init))
1158                   pp_c_constant (pp, TREE_PURPOSE (init));
1159                 pp_c_right_bracket (pp);
1160               }
1161             pp_c_whitespace (pp);
1162             pp_equal (pp);
1163             pp_c_whitespace (pp);
1164             pp_initializer (pp, TREE_VALUE (init));
1165             if (TREE_CHAIN (init))
1166               pp_separate_with (pp, ',');
1167           }
1168       }
1169       return;
1170
1171     case VECTOR_TYPE:
1172       if (TREE_CODE (e) == VECTOR_CST)
1173         pp_c_expression_list (pp, TREE_VECTOR_CST_ELTS (e));
1174       else if (TREE_CODE (e) == CONSTRUCTOR)
1175         pp_c_constructor_elts (pp, CONSTRUCTOR_ELTS (e));
1176       else
1177         break;
1178       return;
1179
1180     case COMPLEX_TYPE:
1181       if (TREE_CODE (e) == CONSTRUCTOR)
1182         pp_c_constructor_elts (pp, CONSTRUCTOR_ELTS (e));
1183       else if (TREE_CODE (e) == COMPLEX_CST || TREE_CODE (e) == COMPLEX_EXPR)
1184         {
1185           const bool cst = TREE_CODE (e) == COMPLEX_CST;
1186           pp_expression (pp, cst ? TREE_REALPART (e) : TREE_OPERAND (e, 0));
1187           pp_separate_with (pp, ',');
1188           pp_expression (pp, cst ? TREE_IMAGPART (e) : TREE_OPERAND (e, 1));
1189         }
1190       else
1191         break;
1192       return;
1193
1194     default:
1195       break;
1196     }
1197
1198   pp_unsupported_tree (pp, type);
1199 }
1200
1201 /* Pretty-print a brace-enclosed initializer-list.  */
1202
1203 static void
1204 pp_c_brace_enclosed_initializer_list (c_pretty_printer *pp, tree l)
1205 {
1206   pp_c_left_brace (pp);
1207   pp_c_initializer_list (pp, l);
1208   pp_c_right_brace (pp);
1209 }
1210
1211
1212 /*  This is a convenient function, used to bridge gap between C and C++
1213     grammars.
1214
1215     id-expression:
1216        identifier  */
1217
1218 void
1219 pp_c_id_expression (c_pretty_printer *pp, tree t)
1220 {
1221   switch (TREE_CODE (t))
1222     {
1223     case VAR_DECL:
1224     case PARM_DECL:
1225     case CONST_DECL:
1226     case TYPE_DECL:
1227     case FUNCTION_DECL:
1228     case FIELD_DECL:
1229     case LABEL_DECL:
1230       pp_c_tree_decl_identifier (pp, t);
1231       break;
1232
1233     case IDENTIFIER_NODE:
1234       pp_c_tree_identifier (pp, t);
1235       break;
1236
1237     default:
1238       pp_unsupported_tree (pp, t);
1239       break;
1240     }
1241 }
1242
1243 /* postfix-expression:
1244       primary-expression
1245       postfix-expression [ expression ]
1246       postfix-expression ( argument-expression-list(opt) )
1247       postfix-expression . identifier
1248       postfix-expression -> identifier
1249       postfix-expression ++
1250       postfix-expression --
1251       ( type-name ) { initializer-list }
1252       ( type-name ) { initializer-list , }  */
1253
1254 void
1255 pp_c_postfix_expression (c_pretty_printer *pp, tree e)
1256 {
1257   enum tree_code code = TREE_CODE (e);
1258   switch (code)
1259     {
1260     case POSTINCREMENT_EXPR:
1261     case POSTDECREMENT_EXPR:
1262       pp_postfix_expression (pp, TREE_OPERAND (e, 0));
1263       pp_identifier (pp, code == POSTINCREMENT_EXPR ? "++" : "--");
1264       break;
1265
1266     case ARRAY_REF:
1267       pp_postfix_expression (pp, TREE_OPERAND (e, 0));
1268       pp_c_left_bracket (pp);
1269       pp_expression (pp, TREE_OPERAND (e, 1));
1270       pp_c_right_bracket (pp);
1271       break;
1272
1273     case CALL_EXPR:
1274       pp_postfix_expression (pp, TREE_OPERAND (e, 0));
1275       pp_c_call_argument_list (pp, TREE_OPERAND (e, 1));
1276       break;
1277
1278     case UNORDERED_EXPR:
1279       pp_c_identifier (pp, flag_isoc99
1280                            ? "isunordered"
1281                            : "__builtin_isunordered");
1282       goto two_args_fun;
1283
1284     case ORDERED_EXPR:
1285       pp_c_identifier (pp, flag_isoc99
1286                            ? "!isunordered"
1287                            : "!__builtin_isunordered");
1288       goto two_args_fun;
1289
1290     case UNLT_EXPR:
1291       pp_c_identifier (pp, flag_isoc99
1292                            ? "!isgreaterequal"
1293                            : "!__builtin_isgreaterequal");
1294       goto two_args_fun;
1295
1296     case UNLE_EXPR:
1297       pp_c_identifier (pp, flag_isoc99
1298                            ? "!isgreater"
1299                            : "!__builtin_isgreater");
1300       goto two_args_fun;
1301
1302     case UNGT_EXPR:
1303       pp_c_identifier (pp, flag_isoc99
1304                            ? "!islessequal"
1305                            : "!__builtin_islessequal");
1306       goto two_args_fun;
1307
1308     case UNGE_EXPR:
1309       pp_c_identifier (pp, flag_isoc99
1310                            ? "!isless"
1311                            : "!__builtin_isless");
1312       goto two_args_fun;
1313
1314     case UNEQ_EXPR:
1315       pp_c_identifier (pp, flag_isoc99
1316                            ? "!islessgreater"
1317                            : "!__builtin_islessgreater");
1318       goto two_args_fun;
1319
1320     case LTGT_EXPR:
1321       pp_c_identifier (pp, flag_isoc99
1322                            ? "islessgreater"
1323                            : "__builtin_islessgreater");
1324       goto two_args_fun;
1325
1326     two_args_fun:
1327       pp_c_left_paren (pp);
1328       pp_expression (pp, TREE_OPERAND (e, 0));
1329       pp_separate_with (pp, ',');
1330       pp_expression (pp, TREE_OPERAND (e, 1));
1331       pp_c_right_paren (pp);
1332       break;
1333
1334     case ABS_EXPR:
1335       pp_c_identifier (pp, "__builtin_abs");
1336       pp_c_left_paren (pp);
1337       pp_expression (pp, TREE_OPERAND (e, 0));
1338       pp_c_right_paren (pp);
1339       break;
1340
1341     case COMPONENT_REF:
1342       {
1343         tree object = TREE_OPERAND (e, 0);
1344         if (TREE_CODE (object) == INDIRECT_REF)
1345           {
1346             pp_postfix_expression (pp, TREE_OPERAND (object, 0));
1347             pp_c_arrow (pp);
1348           }
1349         else
1350           {
1351             pp_postfix_expression (pp, object);
1352             pp_c_dot (pp);
1353           }
1354         pp_expression (pp, TREE_OPERAND (e, 1));
1355       }
1356       break;
1357
1358     case COMPLEX_CST:
1359     case VECTOR_CST:
1360     case COMPLEX_EXPR:
1361       pp_c_compound_literal (pp, e);
1362       break;
1363
1364     case COMPOUND_LITERAL_EXPR:
1365       e = DECL_INITIAL (COMPOUND_LITERAL_EXPR_DECL (e));
1366       /* Fall through.  */
1367     case CONSTRUCTOR:
1368       pp_initializer (pp, e);
1369       break;
1370
1371     case VA_ARG_EXPR:
1372       pp_c_identifier (pp, "__builtin_va_arg");
1373       pp_c_left_paren (pp);
1374       pp_assignment_expression (pp, TREE_OPERAND (e, 0));
1375       pp_separate_with (pp, ',');
1376       pp_type_id (pp, TREE_TYPE (e));
1377       pp_c_right_paren (pp);
1378       break;
1379
1380     case ADDR_EXPR:
1381       if (TREE_CODE (TREE_OPERAND (e, 0)) == FUNCTION_DECL)
1382         {
1383           pp_c_id_expression (pp, TREE_OPERAND (e, 0));
1384           break;
1385         }
1386       /* else fall through.  */
1387
1388     default:
1389       pp_primary_expression (pp, e);
1390       break;
1391     }
1392 }
1393
1394 /* Print out an expression-list; E is expected to be a TREE_LIST.  */
1395
1396 void
1397 pp_c_expression_list (c_pretty_printer *pp, tree e)
1398 {
1399   for (; e != NULL_TREE; e = TREE_CHAIN (e))
1400     {
1401       pp_expression (pp, TREE_VALUE (e));
1402       if (TREE_CHAIN (e))
1403         pp_separate_with (pp, ',');
1404     }
1405 }
1406
1407 /* Print out V, which contains the elements of a constructor.  */
1408
1409 void
1410 pp_c_constructor_elts (c_pretty_printer *pp, VEC(constructor_elt,gc) *v)
1411 {
1412   unsigned HOST_WIDE_INT ix;
1413   tree value;
1414
1415   FOR_EACH_CONSTRUCTOR_VALUE (v, ix, value)
1416     {
1417       pp_expression (pp, value);
1418       if (ix != VEC_length (constructor_elt, v) - 1)
1419         pp_separate_with (pp, ',');
1420     }
1421 }
1422
1423 /* Print out an expression-list in parens, as in a function call.  */
1424
1425 void
1426 pp_c_call_argument_list (c_pretty_printer *pp, tree t)
1427 {
1428   pp_c_left_paren (pp);
1429   if (t && TREE_CODE (t) == TREE_LIST)
1430     pp_c_expression_list (pp, t);
1431   pp_c_right_paren (pp);
1432 }
1433
1434 /* unary-expression:
1435       postfix-expression
1436       ++ cast-expression
1437       -- cast-expression
1438       unary-operator cast-expression
1439       sizeof unary-expression
1440       sizeof ( type-id )
1441
1442   unary-operator: one of
1443       * &  + - ! ~
1444
1445    GNU extensions.
1446    unary-expression:
1447       __alignof__ unary-expression
1448       __alignof__ ( type-id )
1449       __real__ unary-expression
1450       __imag__ unary-expression  */
1451
1452 void
1453 pp_c_unary_expression (c_pretty_printer *pp, tree e)
1454 {
1455   enum tree_code code = TREE_CODE (e);
1456   switch (code)
1457     {
1458     case PREINCREMENT_EXPR:
1459     case PREDECREMENT_EXPR:
1460       pp_identifier (pp, code == PREINCREMENT_EXPR ? "++" : "--");
1461       pp_c_unary_expression (pp, TREE_OPERAND (e, 0));
1462       break;
1463
1464     case ADDR_EXPR:
1465     case INDIRECT_REF:
1466     case NEGATE_EXPR:
1467     case BIT_NOT_EXPR:
1468     case TRUTH_NOT_EXPR:
1469     case CONJ_EXPR:
1470       /* String literal are used by address.  */
1471       if (code == ADDR_EXPR && TREE_CODE (TREE_OPERAND (e, 0)) != STRING_CST)
1472         pp_ampersand (pp);
1473       else if (code == INDIRECT_REF)
1474         pp_c_star (pp);
1475       else if (code == NEGATE_EXPR)
1476         pp_minus (pp);
1477       else if (code == BIT_NOT_EXPR || code == CONJ_EXPR)
1478         pp_complement (pp);
1479       else if (code == TRUTH_NOT_EXPR)
1480         pp_exclamation (pp);
1481       pp_c_cast_expression (pp, TREE_OPERAND (e, 0));
1482       break;
1483
1484     case REALPART_EXPR:
1485     case IMAGPART_EXPR:
1486       pp_c_identifier (pp, code == REALPART_EXPR ? "__real__" : "__imag__");
1487       pp_c_whitespace (pp);
1488       pp_unary_expression (pp, TREE_OPERAND (e, 0));
1489       break;
1490
1491     default:
1492       pp_postfix_expression (pp, e);
1493       break;
1494     }
1495 }
1496
1497 /* cast-expression:
1498       unary-expression
1499       ( type-name ) cast-expression  */
1500
1501 void
1502 pp_c_cast_expression (c_pretty_printer *pp, tree e)
1503 {
1504   switch (TREE_CODE (e))
1505     {
1506     case FLOAT_EXPR:
1507     case FIX_TRUNC_EXPR:
1508     case CONVERT_EXPR:
1509     case NOP_EXPR:
1510       pp_c_type_cast (pp, TREE_TYPE (e));
1511       pp_c_cast_expression (pp, TREE_OPERAND (e, 0));
1512       break;
1513
1514     default:
1515       pp_unary_expression (pp, e);
1516     }
1517 }
1518
1519 /* multiplicative-expression:
1520       cast-expression
1521       multiplicative-expression * cast-expression
1522       multiplicative-expression / cast-expression
1523       multiplicative-expression % cast-expression   */
1524
1525 static void
1526 pp_c_multiplicative_expression (c_pretty_printer *pp, tree e)
1527 {
1528   enum tree_code code = TREE_CODE (e);
1529   switch (code)
1530     {
1531     case MULT_EXPR:
1532     case TRUNC_DIV_EXPR:
1533     case TRUNC_MOD_EXPR:
1534       pp_multiplicative_expression (pp, TREE_OPERAND (e, 0));
1535       pp_c_whitespace (pp);
1536       if (code == MULT_EXPR)
1537         pp_c_star (pp);
1538       else if (code == TRUNC_DIV_EXPR)
1539         pp_slash (pp);
1540       else
1541         pp_modulo (pp);
1542       pp_c_whitespace (pp);
1543       pp_c_cast_expression (pp, TREE_OPERAND (e, 1));
1544       break;
1545
1546     default:
1547       pp_c_cast_expression (pp, e);
1548       break;
1549     }
1550 }
1551
1552 /* additive-expression:
1553       multiplicative-expression
1554       additive-expression + multiplicative-expression
1555       additive-expression - multiplicative-expression   */
1556
1557 static void
1558 pp_c_additive_expression (c_pretty_printer *pp, tree e)
1559 {
1560   enum tree_code code = TREE_CODE (e);
1561   switch (code)
1562     {
1563     case PLUS_EXPR:
1564     case MINUS_EXPR:
1565       pp_c_additive_expression (pp, TREE_OPERAND (e, 0));
1566       pp_c_whitespace (pp);
1567       if (code == PLUS_EXPR)
1568         pp_plus (pp);
1569       else
1570         pp_minus (pp);
1571       pp_c_whitespace (pp);
1572       pp_multiplicative_expression (pp, TREE_OPERAND (e, 1));
1573       break;
1574
1575     default:
1576       pp_multiplicative_expression (pp, e);
1577       break;
1578     }
1579 }
1580
1581 /* additive-expression:
1582       additive-expression
1583       shift-expression << additive-expression
1584       shift-expression >> additive-expression   */
1585
1586 static void
1587 pp_c_shift_expression (c_pretty_printer *pp, tree e)
1588 {
1589   enum tree_code code = TREE_CODE (e);
1590   switch (code)
1591     {
1592     case LSHIFT_EXPR:
1593     case RSHIFT_EXPR:
1594       pp_c_shift_expression (pp, TREE_OPERAND (e, 0));
1595       pp_c_whitespace (pp);
1596       pp_identifier (pp, code == LSHIFT_EXPR ? "<<" : ">>");
1597       pp_c_whitespace (pp);
1598       pp_c_additive_expression (pp, TREE_OPERAND (e, 1));
1599       break;
1600
1601     default:
1602       pp_c_additive_expression (pp, e);
1603     }
1604 }
1605
1606 /* relational-expression:
1607       shift-expression
1608       relational-expression < shift-expression
1609       relational-expression > shift-expression
1610       relational-expression <= shift-expression
1611       relational-expression >= shift-expression   */
1612
1613 static void
1614 pp_c_relational_expression (c_pretty_printer *pp, tree e)
1615 {
1616   enum tree_code code = TREE_CODE (e);
1617   switch (code)
1618     {
1619     case LT_EXPR:
1620     case GT_EXPR:
1621     case LE_EXPR:
1622     case GE_EXPR:
1623       pp_c_relational_expression (pp, TREE_OPERAND (e, 0));
1624       pp_c_whitespace (pp);
1625       if (code == LT_EXPR)
1626         pp_less (pp);
1627       else if (code == GT_EXPR)
1628         pp_greater (pp);
1629       else if (code == LE_EXPR)
1630         pp_identifier (pp, "<=");
1631       else if (code == GE_EXPR)
1632         pp_identifier (pp, ">=");
1633       pp_c_whitespace (pp);
1634       pp_c_shift_expression (pp, TREE_OPERAND (e, 1));
1635       break;
1636
1637     default:
1638       pp_c_shift_expression (pp, e);
1639       break;
1640     }
1641 }
1642
1643 /* equality-expression:
1644       relational-expression
1645       equality-expression == relational-expression
1646       equality-equality != relational-expression  */
1647
1648 static void
1649 pp_c_equality_expression (c_pretty_printer *pp, tree e)
1650 {
1651   enum tree_code code = TREE_CODE (e);
1652   switch (code)
1653     {
1654     case EQ_EXPR:
1655     case NE_EXPR:
1656       pp_c_equality_expression (pp, TREE_OPERAND (e, 0));
1657       pp_c_whitespace (pp);
1658       pp_identifier (pp, code == EQ_EXPR ? "==" : "!=");
1659       pp_c_whitespace (pp);
1660       pp_c_relational_expression (pp, TREE_OPERAND (e, 1));
1661       break;
1662
1663     default:
1664       pp_c_relational_expression (pp, e);
1665       break;
1666     }
1667 }
1668
1669 /* AND-expression:
1670       equality-expression
1671       AND-expression & equality-equality   */
1672
1673 static void
1674 pp_c_and_expression (c_pretty_printer *pp, tree e)
1675 {
1676   if (TREE_CODE (e) == BIT_AND_EXPR)
1677     {
1678       pp_c_and_expression (pp, TREE_OPERAND (e, 0));
1679       pp_c_whitespace (pp);
1680       pp_ampersand (pp);
1681       pp_c_whitespace (pp);
1682       pp_c_equality_expression (pp, TREE_OPERAND (e, 1));
1683     }
1684   else
1685     pp_c_equality_expression (pp, e);
1686 }
1687
1688 /* exclusive-OR-expression:
1689      AND-expression
1690      exclusive-OR-expression ^ AND-expression  */
1691
1692 static void
1693 pp_c_exclusive_or_expression (c_pretty_printer *pp, tree e)
1694 {
1695   if (TREE_CODE (e) == BIT_XOR_EXPR)
1696     {
1697       pp_c_exclusive_or_expression (pp, TREE_OPERAND (e, 0));
1698       pp_c_maybe_whitespace (pp);
1699       pp_carret (pp);
1700       pp_c_whitespace (pp);
1701       pp_c_and_expression (pp, TREE_OPERAND (e, 1));
1702     }
1703   else
1704     pp_c_and_expression (pp, e);
1705 }
1706
1707 /* inclusive-OR-expression:
1708      exclusive-OR-expression
1709      inclusive-OR-expression | exclusive-OR-expression  */
1710
1711 static void
1712 pp_c_inclusive_or_expression (c_pretty_printer *pp, tree e)
1713 {
1714   if (TREE_CODE (e) == BIT_IOR_EXPR)
1715     {
1716       pp_c_exclusive_or_expression (pp, TREE_OPERAND (e, 0));
1717       pp_c_whitespace (pp);
1718       pp_bar (pp);
1719       pp_c_whitespace (pp);
1720       pp_c_exclusive_or_expression (pp, TREE_OPERAND (e, 1));
1721     }
1722   else
1723     pp_c_exclusive_or_expression (pp, e);
1724 }
1725
1726 /* logical-AND-expression:
1727       inclusive-OR-expression
1728       logical-AND-expression && inclusive-OR-expression  */
1729
1730 static void
1731 pp_c_logical_and_expression (c_pretty_printer *pp, tree e)
1732 {
1733   if (TREE_CODE (e) == TRUTH_ANDIF_EXPR)
1734     {
1735       pp_c_logical_and_expression (pp, TREE_OPERAND (e, 0));
1736       pp_c_whitespace (pp);
1737       pp_identifier (pp, "&&");
1738       pp_c_whitespace (pp);
1739       pp_c_inclusive_or_expression (pp, TREE_OPERAND (e, 1));
1740     }
1741   else
1742     pp_c_inclusive_or_expression (pp, e);
1743 }
1744
1745 /* logical-OR-expression:
1746       logical-AND-expression
1747       logical-OR-expression || logical-AND-expression  */
1748
1749 void
1750 pp_c_logical_or_expression (c_pretty_printer *pp, tree e)
1751 {
1752   if (TREE_CODE (e) == TRUTH_ORIF_EXPR)
1753     {
1754       pp_c_logical_or_expression (pp, TREE_OPERAND (e, 0));
1755       pp_c_whitespace (pp);
1756       pp_identifier (pp, "||");
1757       pp_c_whitespace (pp);
1758       pp_c_logical_and_expression (pp, TREE_OPERAND (e, 1));
1759     }
1760   else
1761     pp_c_logical_and_expression (pp, e);
1762 }
1763
1764 /* conditional-expression:
1765       logical-OR-expression
1766       logical-OR-expression ? expression : conditional-expression  */
1767
1768 static void
1769 pp_c_conditional_expression (c_pretty_printer *pp, tree e)
1770 {
1771   if (TREE_CODE (e) == COND_EXPR)
1772     {
1773       pp_c_logical_or_expression (pp, TREE_OPERAND (e, 0));
1774       pp_c_whitespace (pp);
1775       pp_question (pp);
1776       pp_c_whitespace (pp);
1777       pp_expression (pp, TREE_OPERAND (e, 1));
1778       pp_c_whitespace (pp);
1779       pp_colon (pp);
1780       pp_c_whitespace (pp);
1781       pp_c_conditional_expression (pp, TREE_OPERAND (e, 2));
1782     }
1783   else
1784     pp_c_logical_or_expression (pp, e);
1785 }
1786
1787
1788 /* assignment-expression:
1789       conditional-expression
1790       unary-expression assignment-operator  assignment-expression
1791
1792    assignment-expression: one of
1793       =    *=    /=    %=    +=    -=    >>=    <<=    &=    ^=    |=  */
1794
1795 static void
1796 pp_c_assignment_expression (c_pretty_printer *pp, tree e)
1797 {
1798   if (TREE_CODE (e) == MODIFY_EXPR || TREE_CODE (e) == INIT_EXPR)
1799     {
1800       pp_c_unary_expression (pp, TREE_OPERAND (e, 0));
1801       pp_c_whitespace (pp);
1802       pp_equal (pp);
1803       pp_space (pp);
1804       pp_c_expression (pp, TREE_OPERAND (e, 1));
1805     }
1806   else
1807     pp_c_conditional_expression (pp, e);
1808 }
1809
1810 /* expression:
1811        assignment-expression
1812        expression , assignment-expression
1813
1814   Implementation note:  instead of going through the usual recursion
1815   chain, I take the liberty of dispatching nodes to the appropriate
1816   functions.  This makes some redundancy, but it worths it. That also
1817   prevents a possible infinite recursion between pp_c_primary_expression ()
1818   and pp_c_expression ().  */
1819
1820 void
1821 pp_c_expression (c_pretty_printer *pp, tree e)
1822 {
1823   switch (TREE_CODE (e))
1824     {
1825     case INTEGER_CST:
1826       pp_c_integer_constant (pp, e);
1827       break;
1828
1829     case REAL_CST:
1830       pp_c_floating_constant (pp, e);
1831       break;
1832
1833     case STRING_CST:
1834       pp_c_string_literal (pp, e);
1835       break;
1836
1837     case IDENTIFIER_NODE:
1838     case FUNCTION_DECL:
1839     case VAR_DECL:
1840     case CONST_DECL:
1841     case PARM_DECL:
1842     case RESULT_DECL:
1843     case FIELD_DECL:
1844     case LABEL_DECL:
1845     case ERROR_MARK:
1846       pp_primary_expression (pp, e);
1847       break;
1848
1849     case POSTINCREMENT_EXPR:
1850     case POSTDECREMENT_EXPR:
1851     case ARRAY_REF:
1852     case CALL_EXPR:
1853     case COMPONENT_REF:
1854     case COMPLEX_CST:
1855     case COMPLEX_EXPR:
1856     case VECTOR_CST:
1857     case ORDERED_EXPR:
1858     case UNORDERED_EXPR:
1859     case LTGT_EXPR:
1860     case UNEQ_EXPR:
1861     case UNLE_EXPR:
1862     case UNLT_EXPR:
1863     case UNGE_EXPR:
1864     case UNGT_EXPR:
1865     case ABS_EXPR:
1866     case CONSTRUCTOR:
1867     case COMPOUND_LITERAL_EXPR:
1868     case VA_ARG_EXPR:
1869       pp_postfix_expression (pp, e);
1870       break;
1871
1872     case CONJ_EXPR:
1873     case ADDR_EXPR:
1874     case INDIRECT_REF:
1875     case NEGATE_EXPR:
1876     case BIT_NOT_EXPR:
1877     case TRUTH_NOT_EXPR:
1878     case PREINCREMENT_EXPR:
1879     case PREDECREMENT_EXPR:
1880     case REALPART_EXPR:
1881     case IMAGPART_EXPR:
1882       pp_c_unary_expression (pp, e);
1883       break;
1884
1885     case FLOAT_EXPR:
1886     case FIX_TRUNC_EXPR:
1887     case CONVERT_EXPR:
1888     case NOP_EXPR:
1889       pp_c_cast_expression (pp, e);
1890       break;
1891
1892     case MULT_EXPR:
1893     case TRUNC_MOD_EXPR:
1894     case TRUNC_DIV_EXPR:
1895       pp_multiplicative_expression (pp, e);
1896       break;
1897
1898     case LSHIFT_EXPR:
1899     case RSHIFT_EXPR:
1900       pp_c_shift_expression (pp, e);
1901       break;
1902
1903     case LT_EXPR:
1904     case GT_EXPR:
1905     case LE_EXPR:
1906     case GE_EXPR:
1907       pp_c_relational_expression (pp, e);
1908       break;
1909
1910     case BIT_AND_EXPR:
1911       pp_c_and_expression (pp, e);
1912       break;
1913
1914     case BIT_XOR_EXPR:
1915       pp_c_exclusive_or_expression (pp, e);
1916       break;
1917
1918     case BIT_IOR_EXPR:
1919       pp_c_inclusive_or_expression (pp, e);
1920       break;
1921
1922     case TRUTH_ANDIF_EXPR:
1923       pp_c_logical_and_expression (pp, e);
1924       break;
1925
1926     case TRUTH_ORIF_EXPR:
1927       pp_c_logical_or_expression (pp, e);
1928       break;
1929
1930     case EQ_EXPR:
1931     case NE_EXPR:
1932       pp_c_equality_expression (pp, e);
1933       break;
1934
1935     case COND_EXPR:
1936       pp_conditional_expression (pp, e);
1937       break;
1938
1939     case PLUS_EXPR:
1940     case MINUS_EXPR:
1941       pp_c_additive_expression (pp, e);
1942       break;
1943
1944     case MODIFY_EXPR:
1945     case INIT_EXPR:
1946       pp_assignment_expression (pp, e);
1947       break;
1948
1949     case COMPOUND_EXPR:
1950       pp_c_left_paren (pp);
1951       pp_expression (pp, TREE_OPERAND (e, 0));
1952       pp_separate_with (pp, ',');
1953       pp_assignment_expression (pp, TREE_OPERAND (e, 1));
1954       pp_c_right_paren (pp);
1955       break;
1956
1957     case NON_LVALUE_EXPR:
1958     case SAVE_EXPR:
1959       pp_expression (pp, TREE_OPERAND (e, 0));
1960       break;
1961
1962     case TARGET_EXPR:
1963       pp_postfix_expression (pp, TREE_OPERAND (e, 1));
1964       break;
1965
1966     default:
1967       pp_unsupported_tree (pp, e);
1968       break;
1969     }
1970 }
1971
1972
1973 \f
1974 /* Statements.  */
1975
1976 void
1977 pp_c_statement (c_pretty_printer *pp, tree stmt)
1978 {
1979   if (stmt == NULL)
1980     return;
1981
1982   if (pp_needs_newline (pp))
1983     pp_newline_and_indent (pp, 0);
1984
1985   dump_generic_node (pp_base (pp), stmt, pp_indentation (pp), 0, true);
1986 }
1987
1988 \f
1989 /* Initialize the PRETTY-PRINTER for handling C codes.  */
1990
1991 void
1992 pp_c_pretty_printer_init (c_pretty_printer *pp)
1993 {
1994   pp->offset_list               = 0;
1995
1996   pp->declaration               = pp_c_declaration;
1997   pp->declaration_specifiers    = pp_c_declaration_specifiers;
1998   pp->declarator                = pp_c_declarator;
1999   pp->direct_declarator         = pp_c_direct_declarator;
2000   pp->type_specifier_seq        = pp_c_specifier_qualifier_list;
2001   pp->abstract_declarator       = pp_c_abstract_declarator;
2002   pp->direct_abstract_declarator = pp_c_direct_abstract_declarator;
2003   pp->ptr_operator              = pp_c_pointer;
2004   pp->parameter_list            = pp_c_parameter_type_list;
2005   pp->type_id                   = pp_c_type_id;
2006   pp->simple_type_specifier     = pp_c_type_specifier;
2007   pp->function_specifier        = pp_c_function_specifier;
2008   pp->storage_class_specifier   = pp_c_storage_class_specifier;
2009
2010   pp->statement                 = pp_c_statement;
2011
2012   pp->constant                  = pp_c_constant;
2013   pp->id_expression             = pp_c_id_expression;
2014   pp->primary_expression        = pp_c_primary_expression;
2015   pp->postfix_expression        = pp_c_postfix_expression;
2016   pp->unary_expression          = pp_c_unary_expression;
2017   pp->initializer               = pp_c_initializer;
2018   pp->multiplicative_expression = pp_c_multiplicative_expression;
2019   pp->conditional_expression    = pp_c_conditional_expression;
2020   pp->assignment_expression     = pp_c_assignment_expression;
2021   pp->expression                = pp_c_expression;
2022 }
2023
2024
2025 /* Print the tree T in full, on file FILE.  */
2026
2027 void
2028 print_c_tree (FILE *file, tree t)
2029 {
2030   static c_pretty_printer pp_rec;
2031   static bool initialized = 0;
2032   c_pretty_printer *pp = &pp_rec;
2033
2034   if (!initialized)
2035     {
2036       initialized = 1;
2037       pp_construct (pp_base (pp), NULL, 0);
2038       pp_c_pretty_printer_init (pp);
2039       pp_needs_newline (pp) = true;
2040     }
2041   pp_base (pp)->buffer->stream = file;
2042
2043   pp_statement (pp, t);
2044
2045   pp_newline (pp);
2046   pp_flush (pp);
2047 }
2048
2049 /* Print the tree T in full, on stderr.  */
2050
2051 void
2052 debug_c_tree (tree t)
2053 {
2054   print_c_tree (stderr, t);
2055   fputc ('\n', stderr);
2056 }
2057
2058 /* Output the DECL_NAME of T.  If T has no DECL_NAME, output a string made
2059    up of T's memory address.  */
2060
2061 void
2062 pp_c_tree_decl_identifier (c_pretty_printer *pp, tree t)
2063 {
2064   const char *name;
2065
2066   gcc_assert (DECL_P (t));
2067
2068   if (DECL_NAME (t))
2069     name = IDENTIFIER_POINTER (DECL_NAME (t));
2070   else
2071     {
2072       static char xname[8];
2073       sprintf (xname, "<U%4x>", ((unsigned)((unsigned long)(t) & 0xffff)));
2074       name = xname;
2075     }
2076
2077   pp_c_identifier (pp, name);
2078 }