gdb/expprint.c

   1 /* Print in infix form a struct expression.
   2
   3    Copyright (C) 1986, 1988, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
   4    1998, 1999, 2000, 2003, 2007, 2008 Free Software Foundation, Inc.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 #include "defs.h"
  22 #include "symtab.h"
  23 #include "gdbtypes.h"
  24 #include "expression.h"
  25 #include "value.h"
  26 #include "language.h"
  27 #include "parser-defs.h"
  28 #include "user-regs.h"          /* For user_reg_map_regnum_to_name.  */
  29 #include "target.h"
  30 #include "gdb_string.h"
  31 #include "block.h"
  32 #include "objfiles.h"
  33 #include "gdb_assert.h"
  34
  35 #ifdef HAVE_CTYPE_H
  36 #include <ctype.h>
  37 #endif
  38
  39 void
  40 print_expression (struct expression *exp, struct ui_file *stream)
  41 {
  42   int pc = 0;
  43   print_subexp (exp, &pc, stream, PREC_NULL);
  44 }
  45
  46 /* Print the subexpression of EXP that starts in position POS, on STREAM.
  47    PREC is the precedence of the surrounding operator;
  48    if the precedence of the main operator of this subexpression is less,
  49    parentheses are needed here.  */
  50
  51 void
  52 print_subexp (struct expression *exp, int *pos,
  53               struct ui_file *stream, enum precedence prec)
  54 {
  55   exp->language_defn->la_exp_desc->print_subexp (exp, pos, stream, prec);
  56 }
  57
  58 /* Standard implementation of print_subexp for use in language_defn
  59    vectors.  */
  60 void
  61 print_subexp_standard (struct expression *exp, int *pos,
  62                        struct ui_file *stream, enum precedence prec)
  63 {
  64   unsigned tem;
  65   const struct op_print *op_print_tab;
  66   int pc;
  67   unsigned nargs;
  68   char *op_str;
  69   int assign_modify = 0;
  70   enum exp_opcode opcode;
  71   enum precedence myprec = PREC_NULL;
  72   /* Set to 1 for a right-associative operator.  */
  73   int assoc = 0;
  74   struct value *val;
  75   char *tempstr = NULL;
  76
  77   op_print_tab = exp->language_defn->la_op_print_tab;
  78   pc = (*pos)++;
  79   opcode = exp->elts[pc].opcode;
  80   switch (opcode)
  81     {
  82       /* Common ops */
  83
  84     case OP_SCOPE:
  85       myprec = PREC_PREFIX;
  86       assoc = 0;
  87       fputs_filtered (type_name_no_tag (exp->elts[pc + 1].type), stream);
  88       fputs_filtered ("::", stream);
  89       nargs = longest_to_int (exp->elts[pc + 2].longconst);
  90       (*pos) += 4 + BYTES_TO_EXP_ELEM (nargs + 1);
  91       fputs_filtered (&exp->elts[pc + 3].string, stream);
  92       return;
  93
  94     case OP_LONG:
  95       (*pos) += 3;
  96       value_print (value_from_longest (exp->elts[pc + 1].type,
  97                                        exp->elts[pc + 2].longconst),
  98                    stream, 0, Val_no_prettyprint);
  99       return;
 100
 101     case OP_DOUBLE:
 102       (*pos) += 3;
 103       value_print (value_from_double (exp->elts[pc + 1].type,
 104                                       exp->elts[pc + 2].doubleconst),
 105                    stream, 0, Val_no_prettyprint);
 106       return;
 107
 108     case OP_VAR_VALUE:
 109       {
 110         struct block *b;
 111         (*pos) += 3;
 112         b = exp->elts[pc + 1].block;
 113         if (b != NULL
 114             && BLOCK_FUNCTION (b) != NULL
 115             && SYMBOL_PRINT_NAME (BLOCK_FUNCTION (b)) != NULL)
 116           {
 117             fputs_filtered (SYMBOL_PRINT_NAME (BLOCK_FUNCTION (b)), stream);
 118             fputs_filtered ("::", stream);
 119           }
 120         fputs_filtered (SYMBOL_PRINT_NAME (exp->elts[pc + 2].symbol), stream);
 121       }
 122       return;
 123
 124     case OP_LAST:
 125       (*pos) += 2;
 126       fprintf_filtered (stream, "$%d",
 127                         longest_to_int (exp->elts[pc + 1].longconst));
 128       return;
 129
 130     case OP_REGISTER:
 131       {
 132         const char *name = &exp->elts[pc + 2].string;
 133         (*pos) += 3 + BYTES_TO_EXP_ELEM (exp->elts[pc + 1].longconst + 1);
 134         fprintf_filtered (stream, "$%s", name);
 135         return;
 136       }
 137
 138     case OP_BOOL:
 139       (*pos) += 2;
 140       fprintf_filtered (stream, "%s",
 141                         longest_to_int (exp->elts[pc + 1].longconst)
 142                         ? "TRUE" : "FALSE");
 143       return;
 144
 145     case OP_INTERNALVAR:
 146       (*pos) += 2;
 147       fprintf_filtered (stream, "$%s",
 148                         internalvar_name (exp->elts[pc + 1].internalvar));
 149       return;
 150
 151     case OP_FUNCALL:
 152       (*pos) += 2;
 153       nargs = longest_to_int (exp->elts[pc + 1].longconst);
 154       print_subexp (exp, pos, stream, PREC_SUFFIX);
 155       fputs_filtered (" (", stream);
 156       for (tem = 0; tem < nargs; tem++)
 157         {
 158           if (tem != 0)
 159             fputs_filtered (", ", stream);
 160           print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
 161         }
 162       fputs_filtered (")", stream);
 163       return;
 164
 165     case OP_NAME:
 166       nargs = longest_to_int (exp->elts[pc + 1].longconst);
 167       (*pos) += 3 + BYTES_TO_EXP_ELEM (nargs + 1);
 168       fputs_filtered (&exp->elts[pc + 2].string, stream);
 169       return;
 170
 171     case OP_STRING:
 172       nargs = longest_to_int (exp->elts[pc + 1].longconst);
 173       (*pos) += 3 + BYTES_TO_EXP_ELEM (nargs + 1);
 174       /* LA_PRINT_STRING will print using the current repeat count threshold.
 175          If necessary, we can temporarily set it to zero, or pass it as an
 176          additional parameter to LA_PRINT_STRING.  -fnf */
 177       LA_PRINT_STRING (stream, &exp->elts[pc + 2].string, nargs, 1, 0);
 178       return;
 179
 180     case OP_BITSTRING:
 181       nargs = longest_to_int (exp->elts[pc + 1].longconst);
 182       (*pos)
 183         += 3 + BYTES_TO_EXP_ELEM ((nargs + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT);
 184       fprintf_unfiltered (stream, "B'<unimplemented>'");
 185       return;
 186
 187     case OP_OBJC_NSSTRING:      /* Objective-C Foundation Class NSString constant.  */
 188       nargs = longest_to_int (exp->elts[pc + 1].longconst);
 189       (*pos) += 3 + BYTES_TO_EXP_ELEM (nargs + 1);
 190       fputs_filtered ("@\"", stream);
 191       LA_PRINT_STRING (stream, &exp->elts[pc + 2].string, nargs, 1, 0);
 192       fputs_filtered ("\"", stream);
 193       return;
 194
 195     case OP_OBJC_MSGCALL:
 196       {                 /* Objective C message (method) call.  */
 197         char *selector;
 198         (*pos) += 3;
 199         nargs = longest_to_int (exp->elts[pc + 2].longconst);
 200         fprintf_unfiltered (stream, "[");
 201         print_subexp (exp, pos, stream, PREC_SUFFIX);
 202         if (0 == target_read_string (exp->elts[pc + 1].longconst,
 203                                      &selector, 1024, NULL))
 204           {
 205             error (_("bad selector"));
 206             return;
 207           }
 208         if (nargs)
 209           {
 210             char *s, *nextS;
 211             s = alloca (strlen (selector) + 1);
 212             strcpy (s, selector);
 213             for (tem = 0; tem < nargs; tem++)
 214               {
 215                 nextS = strchr (s, ':');
 216                 gdb_assert (nextS);     /* Make sure we found ':'.  */
 217                 *nextS = '\0';
 218                 fprintf_unfiltered (stream, " %s: ", s);
 219                 s = nextS + 1;
 220                 print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
 221               }
 222           }
 223         else
 224           {
 225             fprintf_unfiltered (stream, " %s", selector);
 226           }
 227         fprintf_unfiltered (stream, "]");
 228         /* "selector" was malloc'd by target_read_string. Free it.  */
 229         xfree (selector);
 230         return;
 231       }
 232
 233     case OP_ARRAY:
 234       (*pos) += 3;
 235       nargs = longest_to_int (exp->elts[pc + 2].longconst);
 236       nargs -= longest_to_int (exp->elts[pc + 1].longconst);
 237       nargs++;
 238       tem = 0;
 239       if (exp->elts[pc + 4].opcode == OP_LONG
 240           && exp->elts[pc + 5].type
 241              == builtin_type (exp->gdbarch)->builtin_char
 242           && exp->language_defn->la_language == language_c)
 243         {
 244           /* Attempt to print C character arrays using string syntax.
 245              Walk through the args, picking up one character from each
 246              of the OP_LONG expression elements.  If any array element
 247              does not match our expection of what we should find for
 248              a simple string, revert back to array printing.  Note that
 249              the last expression element is an explicit null terminator
 250              byte, which doesn't get printed. */
 251           tempstr = alloca (nargs);
 252           pc += 4;
 253           while (tem < nargs)
 254             {
 255               if (exp->elts[pc].opcode != OP_LONG
 256                   || exp->elts[pc + 1].type
 257                      != builtin_type (exp->gdbarch)->builtin_char)
 258                 {
 259                   /* Not a simple array of char, use regular array printing. */
 260                   tem = 0;
 261                   break;
 262                 }
 263               else
 264                 {
 265                   tempstr[tem++] =
 266                     longest_to_int (exp->elts[pc + 2].longconst);
 267                   pc += 4;
 268                 }
 269             }
 270         }
 271       if (tem > 0)
 272         {
 273           LA_PRINT_STRING (stream, tempstr, nargs - 1, 1, 0);
 274           (*pos) = pc;
 275         }
 276       else
 277         {
 278           fputs_filtered (" {", stream);
 279           for (tem = 0; tem < nargs; tem++)
 280             {
 281               if (tem != 0)
 282                 {
 283                   fputs_filtered (", ", stream);
 284                 }
 285               print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
 286             }
 287           fputs_filtered ("}", stream);
 288         }
 289       return;
 290
 291     case OP_LABELED:
 292       tem = longest_to_int (exp->elts[pc + 1].longconst);
 293       (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
 294       /* Gcc support both these syntaxes.  Unsure which is preferred.  */
 295 #if 1
 296       fputs_filtered (&exp->elts[pc + 2].string, stream);
 297       fputs_filtered (": ", stream);
 298 #else
 299       fputs_filtered (".", stream);
 300       fputs_filtered (&exp->elts[pc + 2].string, stream);
 301       fputs_filtered ("=", stream);
 302 #endif
 303       print_subexp (exp, pos, stream, PREC_SUFFIX);
 304       return;
 305
 306     case TERNOP_COND:
 307       if ((int) prec > (int) PREC_COMMA)
 308         fputs_filtered ("(", stream);
 309       /* Print the subexpressions, forcing parentheses
 310          around any binary operations within them.
 311          This is more parentheses than are strictly necessary,
 312          but it looks clearer.  */
 313       print_subexp (exp, pos, stream, PREC_HYPER);
 314       fputs_filtered (" ? ", stream);
 315       print_subexp (exp, pos, stream, PREC_HYPER);
 316       fputs_filtered (" : ", stream);
 317       print_subexp (exp, pos, stream, PREC_HYPER);
 318       if ((int) prec > (int) PREC_COMMA)
 319         fputs_filtered (")", stream);
 320       return;
 321
 322     case TERNOP_SLICE:
 323     case TERNOP_SLICE_COUNT:
 324       print_subexp (exp, pos, stream, PREC_SUFFIX);
 325       fputs_filtered ("(", stream);
 326       print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
 327       fputs_filtered (opcode == TERNOP_SLICE ? " : " : " UP ", stream);
 328       print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
 329       fputs_filtered (")", stream);
 330       return;
 331
 332     case STRUCTOP_STRUCT:
 333       tem = longest_to_int (exp->elts[pc + 1].longconst);
 334       (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
 335       print_subexp (exp, pos, stream, PREC_SUFFIX);
 336       fputs_filtered (".", stream);
 337       fputs_filtered (&exp->elts[pc + 2].string, stream);
 338       return;
 339
 340       /* Will not occur for Modula-2 */
 341     case STRUCTOP_PTR:
 342       tem = longest_to_int (exp->elts[pc + 1].longconst);
 343       (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
 344       print_subexp (exp, pos, stream, PREC_SUFFIX);
 345       fputs_filtered ("->", stream);
 346       fputs_filtered (&exp->elts[pc + 2].string, stream);
 347       return;
 348
 349     case STRUCTOP_MEMBER:
 350       print_subexp (exp, pos, stream, PREC_SUFFIX);
 351       fputs_filtered (".*", stream);
 352       print_subexp (exp, pos, stream, PREC_SUFFIX);
 353       return;
 354
 355     case STRUCTOP_MPTR:
 356       print_subexp (exp, pos, stream, PREC_SUFFIX);
 357       fputs_filtered ("->*", stream);
 358       print_subexp (exp, pos, stream, PREC_SUFFIX);
 359       return;
 360
 361     case BINOP_SUBSCRIPT:
 362       print_subexp (exp, pos, stream, PREC_SUFFIX);
 363       fputs_filtered ("[", stream);
 364       print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
 365       fputs_filtered ("]", stream);
 366       return;
 367
 368     case UNOP_POSTINCREMENT:
 369       print_subexp (exp, pos, stream, PREC_SUFFIX);
 370       fputs_filtered ("++", stream);
 371       return;
 372
 373     case UNOP_POSTDECREMENT:
 374       print_subexp (exp, pos, stream, PREC_SUFFIX);
 375       fputs_filtered ("--", stream);
 376       return;
 377
 378     case UNOP_CAST:
 379       (*pos) += 2;
 380       if ((int) prec > (int) PREC_PREFIX)
 381         fputs_filtered ("(", stream);
 382       fputs_filtered ("(", stream);
 383       type_print (exp->elts[pc + 1].type, "", stream, 0);
 384       fputs_filtered (") ", stream);
 385       print_subexp (exp, pos, stream, PREC_PREFIX);
 386       if ((int) prec > (int) PREC_PREFIX)
 387         fputs_filtered (")", stream);
 388       return;
 389
 390     case UNOP_MEMVAL:
 391       (*pos) += 2;
 392       if ((int) prec > (int) PREC_PREFIX)
 393         fputs_filtered ("(", stream);
 394       if (TYPE_CODE (exp->elts[pc + 1].type) == TYPE_CODE_FUNC &&
 395           exp->elts[pc + 3].opcode == OP_LONG)
 396         {
 397           /* We have a minimal symbol fn, probably.  It's encoded
 398              as a UNOP_MEMVAL (function-type) of an OP_LONG (int, address).
 399              Swallow the OP_LONG (including both its opcodes); ignore
 400              its type; print the value in the type of the MEMVAL.  */
 401           (*pos) += 4;
 402           val = value_at_lazy (exp->elts[pc + 1].type,
 403                                (CORE_ADDR) exp->elts[pc + 5].longconst);
 404           value_print (val, stream, 0, Val_no_prettyprint);
 405         }
 406       else
 407         {
 408           fputs_filtered ("{", stream);
 409           type_print (exp->elts[pc + 1].type, "", stream, 0);
 410           fputs_filtered ("} ", stream);
 411           print_subexp (exp, pos, stream, PREC_PREFIX);
 412         }
 413       if ((int) prec > (int) PREC_PREFIX)
 414         fputs_filtered (")", stream);
 415       return;
 416
 417     case UNOP_MEMVAL_TLS:
 418       (*pos) += 3;
 419       if ((int) prec > (int) PREC_PREFIX)
 420         fputs_filtered ("(", stream);
 421       fputs_filtered ("{", stream);
 422       type_print (exp->elts[pc + 2].type, "", stream, 0);
 423       fputs_filtered ("} ", stream);
 424       print_subexp (exp, pos, stream, PREC_PREFIX);
 425       if ((int) prec > (int) PREC_PREFIX)
 426         fputs_filtered (")", stream);
 427       return;
 428
 429     case BINOP_ASSIGN_MODIFY:
 430       opcode = exp->elts[pc + 1].opcode;
 431       (*pos) += 2;
 432       myprec = PREC_ASSIGN;
 433       assoc = 1;
 434       assign_modify = 1;
 435       op_str = "???";
 436       for (tem = 0; op_print_tab[tem].opcode != OP_NULL; tem++)
 437         if (op_print_tab[tem].opcode == opcode)
 438           {
 439             op_str = op_print_tab[tem].string;
 440             break;
 441           }
 442       if (op_print_tab[tem].opcode != opcode)
 443         /* Not found; don't try to keep going because we don't know how
 444            to interpret further elements.  */
 445         error (_("Invalid expression"));
 446       break;
 447
 448       /* C++ ops */
 449
 450     case OP_THIS:
 451       ++(*pos);
 452       fputs_filtered ("this", stream);
 453       return;
 454
 455       /* Objective-C ops */
 456
 457     case OP_OBJC_SELF:
 458       ++(*pos);
 459       fputs_filtered ("self", stream);  /* The ObjC equivalent of "this".  */
 460       return;
 461
 462       /* Modula-2 ops */
 463
 464     case MULTI_SUBSCRIPT:
 465       (*pos) += 2;
 466       nargs = longest_to_int (exp->elts[pc + 1].longconst);
 467       print_subexp (exp, pos, stream, PREC_SUFFIX);
 468       fprintf_unfiltered (stream, " [");
 469       for (tem = 0; tem < nargs; tem++)
 470         {
 471           if (tem != 0)
 472             fprintf_unfiltered (stream, ", ");
 473           print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
 474         }
 475       fprintf_unfiltered (stream, "]");
 476       return;
 477
 478     case BINOP_VAL:
 479       (*pos) += 2;
 480       fprintf_unfiltered (stream, "VAL(");
 481       type_print (exp->elts[pc + 1].type, "", stream, 0);
 482       fprintf_unfiltered (stream, ",");
 483       print_subexp (exp, pos, stream, PREC_PREFIX);
 484       fprintf_unfiltered (stream, ")");
 485       return;
 486
 487     case BINOP_INCL:
 488     case BINOP_EXCL:
 489       error (_("print_subexp:  Not implemented."));
 490
 491       /* Default ops */
 492
 493     default:
 494       op_str = "???";
 495       for (tem = 0; op_print_tab[tem].opcode != OP_NULL; tem++)
 496         if (op_print_tab[tem].opcode == opcode)
 497           {
 498             op_str = op_print_tab[tem].string;
 499             myprec = op_print_tab[tem].precedence;
 500             assoc = op_print_tab[tem].right_assoc;
 501             break;
 502           }
 503       if (op_print_tab[tem].opcode != opcode)
 504         /* Not found; don't try to keep going because we don't know how
 505            to interpret further elements.  For example, this happens
 506            if opcode is OP_TYPE.  */
 507         error (_("Invalid expression"));
 508     }
 509
 510   /* Note that PREC_BUILTIN will always emit parentheses. */
 511   if ((int) myprec < (int) prec)
 512     fputs_filtered ("(", stream);
 513   if ((int) opcode > (int) BINOP_END)
 514     {
 515       if (assoc)
 516         {
 517           /* Unary postfix operator.  */
 518           print_subexp (exp, pos, stream, PREC_SUFFIX);
 519           fputs_filtered (op_str, stream);
 520         }
 521       else
 522         {
 523           /* Unary prefix operator.  */
 524           fputs_filtered (op_str, stream);
 525           if (myprec == PREC_BUILTIN_FUNCTION)
 526             fputs_filtered ("(", stream);
 527           print_subexp (exp, pos, stream, PREC_PREFIX);
 528           if (myprec == PREC_BUILTIN_FUNCTION)
 529             fputs_filtered (")", stream);
 530         }
 531     }
 532   else
 533     {
 534       /* Binary operator.  */
 535       /* Print left operand.
 536          If operator is right-associative,
 537          increment precedence for this operand.  */
 538       print_subexp (exp, pos, stream,
 539                     (enum precedence) ((int) myprec + assoc));
 540       /* Print the operator itself.  */
 541       if (assign_modify)
 542         fprintf_filtered (stream, " %s= ", op_str);
 543       else if (op_str[0] == ',')
 544         fprintf_filtered (stream, "%s ", op_str);
 545       else
 546         fprintf_filtered (stream, " %s ", op_str);
 547       /* Print right operand.
 548          If operator is left-associative,
 549          increment precedence for this operand.  */
 550       print_subexp (exp, pos, stream,
 551                     (enum precedence) ((int) myprec + !assoc));
 552     }
 553
 554   if ((int) myprec < (int) prec)
 555     fputs_filtered (")", stream);
 556 }
 557
 558 /* Return the operator corresponding to opcode OP as
 559    a string.   NULL indicates that the opcode was not found in the
 560    current language table.  */
 561 char *
 562 op_string (enum exp_opcode op)
 563 {
 564   int tem;
 565   const struct op_print *op_print_tab;
 566
 567   op_print_tab = current_language->la_op_print_tab;
 568   for (tem = 0; op_print_tab[tem].opcode != OP_NULL; tem++)
 569     if (op_print_tab[tem].opcode == op)
 570       return op_print_tab[tem].string;
 571   return NULL;
 572 }
 573
 574 /* Support for dumping the raw data from expressions in a human readable
 575    form.  */
 576
 577 static char *op_name (struct expression *, enum exp_opcode);
 578 static int dump_subexp_body (struct expression *exp, struct ui_file *, int);
 579
 580 /* Name for OPCODE, when it appears in expression EXP. */
 581
 582 static char *
 583 op_name (struct expression *exp, enum exp_opcode opcode)
 584 {
 585   return exp->language_defn->la_exp_desc->op_name (opcode);
 586 }
 587
 588 /* Default name for the standard operator OPCODE (i.e., one defined in
 589    the definition of enum exp_opcode).  */
 590
 591 char *
 592 op_name_standard (enum exp_opcode opcode)
 593 {
 594   switch (opcode)
 595     {
 596     default:
 597       {
 598         static char buf[30];
 599
 600         sprintf (buf, "<unknown %d>", opcode);
 601         return buf;
 602       }
 603     case OP_NULL:
 604       return "OP_NULL";
 605     case BINOP_ADD:
 606       return "BINOP_ADD";
 607     case BINOP_SUB:
 608       return "BINOP_SUB";
 609     case BINOP_MUL:
 610       return "BINOP_MUL";
 611     case BINOP_DIV:
 612       return "BINOP_DIV";
 613     case BINOP_REM:
 614       return "BINOP_REM";
 615     case BINOP_MOD:
 616       return "BINOP_MOD";
 617     case BINOP_LSH:
 618       return "BINOP_LSH";
 619     case BINOP_RSH:
 620       return "BINOP_RSH";
 621     case BINOP_LOGICAL_AND:
 622       return "BINOP_LOGICAL_AND";
 623     case BINOP_LOGICAL_OR:
 624       return "BINOP_LOGICAL_OR";
 625     case BINOP_BITWISE_AND:
 626       return "BINOP_BITWISE_AND";
 627     case BINOP_BITWISE_IOR:
 628       return "BINOP_BITWISE_IOR";
 629     case BINOP_BITWISE_XOR:
 630       return "BINOP_BITWISE_XOR";
 631     case BINOP_EQUAL:
 632       return "BINOP_EQUAL";
 633     case BINOP_NOTEQUAL:
 634       return "BINOP_NOTEQUAL";
 635     case BINOP_LESS:
 636       return "BINOP_LESS";
 637     case BINOP_GTR:
 638       return "BINOP_GTR";
 639     case BINOP_LEQ:
 640       return "BINOP_LEQ";
 641     case BINOP_GEQ:
 642       return "BINOP_GEQ";
 643     case BINOP_REPEAT:
 644       return "BINOP_REPEAT";
 645     case BINOP_ASSIGN:
 646       return "BINOP_ASSIGN";
 647     case BINOP_COMMA:
 648       return "BINOP_COMMA";
 649     case BINOP_SUBSCRIPT:
 650       return "BINOP_SUBSCRIPT";
 651     case MULTI_SUBSCRIPT:
 652       return "MULTI_SUBSCRIPT";
 653     case BINOP_EXP:
 654       return "BINOP_EXP";
 655     case BINOP_MIN:
 656       return "BINOP_MIN";
 657     case BINOP_MAX:
 658       return "BINOP_MAX";
 659     case STRUCTOP_MEMBER:
 660       return "STRUCTOP_MEMBER";
 661     case STRUCTOP_MPTR:
 662       return "STRUCTOP_MPTR";
 663     case BINOP_INTDIV:
 664       return "BINOP_INTDIV";
 665     case BINOP_ASSIGN_MODIFY:
 666       return "BINOP_ASSIGN_MODIFY";
 667     case BINOP_VAL:
 668       return "BINOP_VAL";
 669     case BINOP_INCL:
 670       return "BINOP_INCL";
 671     case BINOP_EXCL:
 672       return "BINOP_EXCL";
 673     case BINOP_CONCAT:
 674       return "BINOP_CONCAT";
 675     case BINOP_RANGE:
 676       return "BINOP_RANGE";
 677     case BINOP_END:
 678       return "BINOP_END";
 679     case TERNOP_COND:
 680       return "TERNOP_COND";
 681     case TERNOP_SLICE:
 682       return "TERNOP_SLICE";
 683     case TERNOP_SLICE_COUNT:
 684       return "TERNOP_SLICE_COUNT";
 685     case OP_LONG:
 686       return "OP_LONG";
 687     case OP_DOUBLE:
 688       return "OP_DOUBLE";
 689     case OP_VAR_VALUE:
 690       return "OP_VAR_VALUE";
 691     case OP_LAST:
 692       return "OP_LAST";
 693     case OP_REGISTER:
 694       return "OP_REGISTER";
 695     case OP_INTERNALVAR:
 696       return "OP_INTERNALVAR";
 697     case OP_FUNCALL:
 698       return "OP_FUNCALL";
 699     case OP_STRING:
 700       return "OP_STRING";
 701     case OP_BITSTRING:
 702       return "OP_BITSTRING";
 703     case OP_ARRAY:
 704       return "OP_ARRAY";
 705     case UNOP_CAST:
 706       return "UNOP_CAST";
 707     case UNOP_MEMVAL:
 708       return "UNOP_MEMVAL";
 709     case UNOP_MEMVAL_TLS:
 710       return "UNOP_MEMVAL_TLS";
 711     case UNOP_NEG:
 712       return "UNOP_NEG";
 713     case UNOP_LOGICAL_NOT:
 714       return "UNOP_LOGICAL_NOT";
 715     case UNOP_COMPLEMENT:
 716       return "UNOP_COMPLEMENT";
 717     case UNOP_IND:
 718       return "UNOP_IND";
 719     case UNOP_ADDR:
 720       return "UNOP_ADDR";
 721     case UNOP_PREINCREMENT:
 722       return "UNOP_PREINCREMENT";
 723     case UNOP_POSTINCREMENT:
 724       return "UNOP_POSTINCREMENT";
 725     case UNOP_PREDECREMENT:
 726       return "UNOP_PREDECREMENT";
 727     case UNOP_POSTDECREMENT:
 728       return "UNOP_POSTDECREMENT";
 729     case UNOP_SIZEOF:
 730       return "UNOP_SIZEOF";
 731     case UNOP_LOWER:
 732       return "UNOP_LOWER";
 733     case UNOP_UPPER:
 734       return "UNOP_UPPER";
 735     case UNOP_LENGTH:
 736       return "UNOP_LENGTH";
 737     case UNOP_PLUS:
 738       return "UNOP_PLUS";
 739     case UNOP_CAP:
 740       return "UNOP_CAP";
 741     case UNOP_CHR:
 742       return "UNOP_CHR";
 743     case UNOP_ORD:
 744       return "UNOP_ORD";
 745     case UNOP_ABS:
 746       return "UNOP_ABS";
 747     case UNOP_FLOAT:
 748       return "UNOP_FLOAT";
 749     case UNOP_HIGH:
 750       return "UNOP_HIGH";
 751     case UNOP_MAX:
 752       return "UNOP_MAX";
 753     case UNOP_MIN:
 754       return "UNOP_MIN";
 755     case UNOP_ODD:
 756       return "UNOP_ODD";
 757     case UNOP_TRUNC:
 758       return "UNOP_TRUNC";
 759     case OP_BOOL:
 760       return "OP_BOOL";
 761     case OP_M2_STRING:
 762       return "OP_M2_STRING";
 763     case STRUCTOP_STRUCT:
 764       return "STRUCTOP_STRUCT";
 765     case STRUCTOP_PTR:
 766       return "STRUCTOP_PTR";
 767     case OP_THIS:
 768       return "OP_THIS";
 769     case OP_OBJC_SELF:
 770       return "OP_OBJC_SELF";
 771     case OP_SCOPE:
 772       return "OP_SCOPE";
 773     case OP_TYPE:
 774       return "OP_TYPE";
 775     case OP_LABELED:
 776       return "OP_LABELED";
 777     }
 778 }
 779
 780 void
 781 dump_raw_expression (struct expression *exp, struct ui_file *stream,
 782                      char *note)
 783 {
 784   int elt;
 785   char *opcode_name;
 786   char *eltscan;
 787   int eltsize;
 788
 789   fprintf_filtered (stream, "Dump of expression @ ");
 790   gdb_print_host_address (exp, stream);
 791   fprintf_filtered (stream, "'\n\tLanguage %s, %d elements, %ld bytes each.\n",
 792                     exp->language_defn->la_name, exp->nelts,
 793                     (long) sizeof (union exp_element));
 794   fprintf_filtered (stream, "\t%5s  %20s  %16s  %s\n", "Index", "Opcode",
 795                     "Hex Value", "String Value");
 796   for (elt = 0; elt < exp->nelts; elt++)
 797     {
 798       fprintf_filtered (stream, "\t%5d  ", elt);
 799       opcode_name = op_name (exp, exp->elts[elt].opcode);
 800
 801       fprintf_filtered (stream, "%20s  ", opcode_name);
 802       print_longest (stream, 'd', 0, exp->elts[elt].longconst);
 803       fprintf_filtered (stream, "  ");
 804
 805       for (eltscan = (char *) &exp->elts[elt],
 806            eltsize = sizeof (union exp_element);
 807            eltsize-- > 0;
 808            eltscan++)
 809         {
 810           fprintf_filtered (stream, "%c",
 811                             isprint (*eltscan) ? (*eltscan & 0xFF) : '.');
 812         }
 813       fprintf_filtered (stream, "\n");
 814     }
 815 }
 816
 817 /* Dump the subexpression of prefix expression EXP whose operator is at
 818    position ELT onto STREAM.  Returns the position of the next
 819    subexpression in EXP.  */
 820
 821 int
 822 dump_subexp (struct expression *exp, struct ui_file *stream, int elt)
 823 {
 824   static int indent = 0;
 825   int i;
 826
 827   fprintf_filtered (stream, "\n");
 828   fprintf_filtered (stream, "\t%5d  ", elt);
 829
 830   for (i = 1; i <= indent; i++)
 831     fprintf_filtered (stream, " ");
 832   indent += 2;
 833
 834   fprintf_filtered (stream, "%-20s  ", op_name (exp, exp->elts[elt].opcode));
 835
 836   elt = dump_subexp_body (exp, stream, elt);
 837
 838   indent -= 2;
 839
 840   return elt;
 841 }
 842
 843 /* Dump the operands of prefix expression EXP whose opcode is at
 844    position ELT onto STREAM.  Returns the position of the next
 845    subexpression in EXP.  */
 846
 847 static int
 848 dump_subexp_body (struct expression *exp, struct ui_file *stream, int elt)
 849 {
 850   return exp->language_defn->la_exp_desc->dump_subexp_body (exp, stream, elt);
 851 }
 852
 853 /* Default value for subexp_body in exp_descriptor vector.  */
 854
 855 int
 856 dump_subexp_body_standard (struct expression *exp,
 857                            struct ui_file *stream, int elt)
 858 {
 859   int opcode = exp->elts[elt++].opcode;
 860
 861   switch (opcode)
 862     {
 863     case TERNOP_COND:
 864     case TERNOP_SLICE:
 865     case TERNOP_SLICE_COUNT:
 866       elt = dump_subexp (exp, stream, elt);
 867     case BINOP_ADD:
 868     case BINOP_SUB:
 869     case BINOP_MUL:
 870     case BINOP_DIV:
 871     case BINOP_REM:
 872     case BINOP_MOD:
 873     case BINOP_LSH:
 874     case BINOP_RSH:
 875     case BINOP_LOGICAL_AND:
 876     case BINOP_LOGICAL_OR:
 877     case BINOP_BITWISE_AND:
 878     case BINOP_BITWISE_IOR:
 879     case BINOP_BITWISE_XOR:
 880     case BINOP_EQUAL:
 881     case BINOP_NOTEQUAL:
 882     case BINOP_LESS:
 883     case BINOP_GTR:
 884     case BINOP_LEQ:
 885     case BINOP_GEQ:
 886     case BINOP_REPEAT:
 887     case BINOP_ASSIGN:
 888     case BINOP_COMMA:
 889     case BINOP_SUBSCRIPT:
 890     case BINOP_EXP:
 891     case BINOP_MIN:
 892     case BINOP_MAX:
 893     case BINOP_INTDIV:
 894     case BINOP_ASSIGN_MODIFY:
 895     case BINOP_VAL:
 896     case BINOP_INCL:
 897     case BINOP_EXCL:
 898     case BINOP_CONCAT:
 899     case BINOP_IN:
 900     case BINOP_RANGE:
 901     case BINOP_END:
 902     case STRUCTOP_MEMBER:
 903     case STRUCTOP_MPTR:
 904       elt = dump_subexp (exp, stream, elt);
 905     case UNOP_NEG:
 906     case UNOP_LOGICAL_NOT:
 907     case UNOP_COMPLEMENT:
 908     case UNOP_IND:
 909     case UNOP_ADDR:
 910     case UNOP_PREINCREMENT:
 911     case UNOP_POSTINCREMENT:
 912     case UNOP_PREDECREMENT:
 913     case UNOP_POSTDECREMENT:
 914     case UNOP_SIZEOF:
 915     case UNOP_PLUS:
 916     case UNOP_CAP:
 917     case UNOP_CHR:
 918     case UNOP_ORD:
 919     case UNOP_ABS:
 920     case UNOP_FLOAT:
 921     case UNOP_HIGH:
 922     case UNOP_MAX:
 923     case UNOP_MIN:
 924     case UNOP_ODD:
 925     case UNOP_TRUNC:
 926     case UNOP_LOWER:
 927     case UNOP_UPPER:
 928     case UNOP_LENGTH:
 929     case UNOP_CARD:
 930     case UNOP_CHMAX:
 931     case UNOP_CHMIN:
 932       elt = dump_subexp (exp, stream, elt);
 933       break;
 934     case OP_LONG:
 935       fprintf_filtered (stream, "Type @");
 936       gdb_print_host_address (exp->elts[elt].type, stream);
 937       fprintf_filtered (stream, " (");
 938       type_print (exp->elts[elt].type, NULL, stream, 0);
 939       fprintf_filtered (stream, "), value %ld (0x%lx)",
 940                         (long) exp->elts[elt + 1].longconst,
 941                         (long) exp->elts[elt + 1].longconst);
 942       elt += 3;
 943       break;
 944     case OP_DOUBLE:
 945       fprintf_filtered (stream, "Type @");
 946       gdb_print_host_address (exp->elts[elt].type, stream);
 947       fprintf_filtered (stream, " (");
 948       type_print (exp->elts[elt].type, NULL, stream, 0);
 949       fprintf_filtered (stream, "), value %g",
 950                         (double) exp->elts[elt + 1].doubleconst);
 951       elt += 3;
 952       break;
 953     case OP_VAR_VALUE:
 954       fprintf_filtered (stream, "Block @");
 955       gdb_print_host_address (exp->elts[elt].block, stream);
 956       fprintf_filtered (stream, ", symbol @");
 957       gdb_print_host_address (exp->elts[elt + 1].symbol, stream);
 958       fprintf_filtered (stream, " (%s)",
 959                         SYMBOL_PRINT_NAME (exp->elts[elt + 1].symbol));
 960       elt += 3;
 961       break;
 962     case OP_LAST:
 963       fprintf_filtered (stream, "History element %ld",
 964                         (long) exp->elts[elt].longconst);
 965       elt += 2;
 966       break;
 967     case OP_REGISTER:
 968       fprintf_filtered (stream, "Register $%s", &exp->elts[elt + 1].string);
 969       elt += 3 + BYTES_TO_EXP_ELEM (exp->elts[elt].longconst + 1);
 970       break;
 971     case OP_INTERNALVAR:
 972       fprintf_filtered (stream, "Internal var @");
 973       gdb_print_host_address (exp->elts[elt].internalvar, stream);
 974       fprintf_filtered (stream, " (%s)",
 975                         exp->elts[elt].internalvar->name);
 976       elt += 2;
 977       break;
 978     case OP_FUNCALL:
 979       {
 980         int i, nargs;
 981
 982         nargs = longest_to_int (exp->elts[elt].longconst);
 983
 984         fprintf_filtered (stream, "Number of args: %d", nargs);
 985         elt += 2;
 986
 987         for (i = 1; i <= nargs + 1; i++)
 988           elt = dump_subexp (exp, stream, elt);
 989       }
 990       break;
 991     case OP_ARRAY:
 992       {
 993         int lower, upper;
 994         int i;
 995
 996         lower = longest_to_int (exp->elts[elt].longconst);
 997         upper = longest_to_int (exp->elts[elt + 1].longconst);
 998
 999         fprintf_filtered (stream, "Bounds [%d:%d]", lower, upper);
1000         elt += 3;
1001
1002         for (i = 1; i <= upper - lower + 1; i++)
1003           elt = dump_subexp (exp, stream, elt);
1004       }
1005       break;
1006     case UNOP_MEMVAL:
1007     case UNOP_CAST:
1008       fprintf_filtered (stream, "Type @");
1009       gdb_print_host_address (exp->elts[elt].type, stream);
1010       fprintf_filtered (stream, " (");
1011       type_print (exp->elts[elt].type, NULL, stream, 0);
1012       fprintf_filtered (stream, ")");
1013       elt = dump_subexp (exp, stream, elt + 2);
1014       break;
1015     case UNOP_MEMVAL_TLS:
1016       fprintf_filtered (stream, "TLS type @");
1017       gdb_print_host_address (exp->elts[elt + 1].type, stream);
1018       fprintf_filtered (stream, " (__thread /* \"%s\" */ ",
1019                         (exp->elts[elt].objfile == NULL ? "(null)"
1020                          : exp->elts[elt].objfile->name));
1021       type_print (exp->elts[elt + 1].type, NULL, stream, 0);
1022       fprintf_filtered (stream, ")");
1023       elt = dump_subexp (exp, stream, elt + 3);
1024       break;
1025     case OP_TYPE:
1026       fprintf_filtered (stream, "Type @");
1027       gdb_print_host_address (exp->elts[elt].type, stream);
1028       fprintf_filtered (stream, " (");
1029       type_print (exp->elts[elt].type, NULL, stream, 0);
1030       fprintf_filtered (stream, ")");
1031       elt += 2;
1032       break;
1033     case STRUCTOP_STRUCT:
1034     case STRUCTOP_PTR:
1035       {
1036         char *elem_name;
1037         int len;
1038
1039         len = longest_to_int (exp->elts[elt].longconst);
1040         elem_name = &exp->elts[elt + 1].string;
1041
1042         fprintf_filtered (stream, "Element name: `%.*s'", len, elem_name);
1043         elt = dump_subexp (exp, stream, elt + 3 + BYTES_TO_EXP_ELEM (len + 1));
1044       }
1045       break;
1046     case OP_SCOPE:
1047       {
1048         char *elem_name;
1049         int len;
1050
1051         fprintf_filtered (stream, "Type @");
1052         gdb_print_host_address (exp->elts[elt].type, stream);
1053         fprintf_filtered (stream, " (");
1054         type_print (exp->elts[elt].type, NULL, stream, 0);
1055         fprintf_filtered (stream, ") ");
1056
1057         len = longest_to_int (exp->elts[elt + 1].longconst);
1058         elem_name = &exp->elts[elt + 2].string;
1059
1060         fprintf_filtered (stream, "Field name: `%.*s'", len, elem_name);
1061         elt += 4 + BYTES_TO_EXP_ELEM (len + 1);
1062       }
1063       break;
1064     default:
1065     case OP_NULL:
1066     case MULTI_SUBSCRIPT:
1067     case OP_F77_UNDETERMINED_ARGLIST:
1068     case OP_COMPLEX:
1069     case OP_STRING:
1070     case OP_BITSTRING:
1071     case OP_BOOL:
1072     case OP_M2_STRING:
1073     case OP_THIS:
1074     case OP_LABELED:
1075     case OP_NAME:
1076       fprintf_filtered (stream, "Unknown format");
1077     }
1078
1079   return elt;
1080 }
1081
1082 void
1083 dump_prefix_expression (struct expression *exp, struct ui_file *stream)
1084 {
1085   int elt;
1086
1087   fprintf_filtered (stream, "Dump of expression @ ");
1088   gdb_print_host_address (exp, stream);
1089   fputs_filtered (", after conversion to prefix form:\nExpression: `", stream);
1090   if (exp->elts[0].opcode != OP_TYPE)
1091     print_expression (exp, stream);
1092   else
1093     fputs_filtered ("Type printing not yet supported....", stream);
1094   fprintf_filtered (stream, "'\n\tLanguage %s, %d elements, %ld bytes each.\n",
1095                     exp->language_defn->la_name, exp->nelts,
1096                     (long) sizeof (union exp_element));
1097   fputs_filtered ("\n", stream);
1098
1099   for (elt = 0; elt < exp->nelts;)
1100     elt = dump_subexp (exp, stream, elt);
1101   fputs_filtered ("\n", stream);
1102 }