gdb/expprint.c

   1 /* Print in infix form a struct expression.
   2    Copyright (C) 1986, 1989, 1991 Free Software Foundation, Inc.
   3
   4    This file is part of GDB.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  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
  29 #ifdef HAVE_CTYPE_H
  30 #include <ctype.h>
  31 #endif
  32
  33 /* Prototypes for local functions */
  34
  35 static void
  36 print_subexp PARAMS ((struct expression *, int *, GDB_FILE *, enum precedence));
  37
  38 void
  39 print_expression (exp, stream)
  40      struct expression *exp;
  41      GDB_FILE *stream;
  42 {
  43   int pc = 0;
  44   print_subexp (exp, &pc, stream, PREC_NULL);
  45 }
  46
  47 /* Print the subexpression of EXP that starts in position POS, on STREAM.
  48    PREC is the precedence of the surrounding operator;
  49    if the precedence of the main operator of this subexpression is less,
  50    parentheses are needed here.  */
  51
  52 static void
  53 print_subexp (exp, pos, stream, prec)
  54      register struct expression *exp;
  55      register int *pos;
  56      GDB_FILE *stream;
  57      enum precedence prec;
  58 {
  59   register unsigned tem;
  60   register const struct op_print *op_print_tab;
  61   register int pc;
  62   unsigned nargs;
  63   register char *op_str;
  64   int assign_modify = 0;
  65   enum exp_opcode opcode;
  66   enum precedence myprec = PREC_NULL;
  67   /* Set to 1 for a right-associative operator.  */
  68   int assoc = 0;
  69   value_ptr val;
  70   char *tempstr = NULL;
  71
  72   op_print_tab = exp->language_defn->la_op_print_tab;
  73   pc = (*pos)++;
  74   opcode = exp->elts[pc].opcode;
  75   switch (opcode)
  76     {
  77       /* Common ops */
  78
  79     case OP_SCOPE:
  80       myprec = PREC_PREFIX;
  81       assoc = 0;
  82       fputs_filtered (type_name_no_tag (exp->elts[pc + 1].type), stream);
  83       fputs_filtered ("::", stream);
  84       nargs = longest_to_int (exp->elts[pc + 2].longconst);
  85       (*pos) += 4 + BYTES_TO_EXP_ELEM (nargs + 1);
  86       fputs_filtered (&exp->elts[pc + 3].string, stream);
  87       return;
  88
  89     case OP_LONG:
  90       (*pos) += 3;
  91       value_print (value_from_longest (exp->elts[pc + 1].type,
  92                                        exp->elts[pc + 2].longconst),
  93                    stream, 0, Val_no_prettyprint);
  94       return;
  95
  96     case OP_DOUBLE:
  97       (*pos) += 3;
  98       value_print (value_from_double (exp->elts[pc + 1].type,
  99                                       exp->elts[pc + 2].doubleconst),
 100                    stream, 0, Val_no_prettyprint);
 101       return;
 102
 103     case OP_VAR_VALUE:
 104       {
 105         struct block *b;
 106         (*pos) += 3;
 107         b = exp->elts[pc + 1].block;
 108         if (b != NULL
 109             && BLOCK_FUNCTION (b) != NULL
 110             && SYMBOL_SOURCE_NAME (BLOCK_FUNCTION (b)) != NULL)
 111           {
 112             fputs_filtered (SYMBOL_SOURCE_NAME (BLOCK_FUNCTION (b)), stream);
 113             fputs_filtered ("::", stream);
 114           }
 115         fputs_filtered (SYMBOL_SOURCE_NAME (exp->elts[pc + 2].symbol), stream);
 116       }
 117       return;
 118
 119     case OP_LAST:
 120       (*pos) += 2;
 121       fprintf_filtered (stream, "$%d",
 122                         longest_to_int (exp->elts[pc + 1].longconst));
 123       return;
 124
 125     case OP_REGISTER:
 126       (*pos) += 2;
 127       fprintf_filtered (stream, "$%s",
 128               REGISTER_NAME (longest_to_int (exp->elts[pc + 1].longconst)));
 129       return;
 130
 131     case OP_BOOL:
 132       (*pos) += 2;
 133       fprintf_filtered (stream, "%s",
 134                         longest_to_int (exp->elts[pc + 1].longconst)
 135                         ? "TRUE" : "FALSE");
 136       return;
 137
 138     case OP_INTERNALVAR:
 139       (*pos) += 2;
 140       fprintf_filtered (stream, "$%s",
 141                         internalvar_name (exp->elts[pc + 1].internalvar));
 142       return;
 143
 144     case OP_FUNCALL:
 145       (*pos) += 2;
 146       nargs = longest_to_int (exp->elts[pc + 1].longconst);
 147       print_subexp (exp, pos, stream, PREC_SUFFIX);
 148       fputs_filtered (" (", stream);
 149       for (tem = 0; tem < nargs; tem++)
 150         {
 151           if (tem != 0)
 152             fputs_filtered (", ", stream);
 153           print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
 154         }
 155       fputs_filtered (")", stream);
 156       return;
 157
 158     case OP_NAME:
 159     case OP_EXPRSTRING:
 160       nargs = longest_to_int (exp->elts[pc + 1].longconst);
 161       (*pos) += 3 + BYTES_TO_EXP_ELEM (nargs + 1);
 162       fputs_filtered (&exp->elts[pc + 2].string, stream);
 163       return;
 164
 165     case OP_STRING:
 166       nargs = longest_to_int (exp->elts[pc + 1].longconst);
 167       (*pos) += 3 + BYTES_TO_EXP_ELEM (nargs + 1);
 168       /* LA_PRINT_STRING will print using the current repeat count threshold.
 169          If necessary, we can temporarily set it to zero, or pass it as an
 170          additional parameter to LA_PRINT_STRING.  -fnf */
 171       LA_PRINT_STRING (stream, &exp->elts[pc + 2].string, nargs, 1, 0);
 172       return;
 173
 174     case OP_BITSTRING:
 175       nargs = longest_to_int (exp->elts[pc + 1].longconst);
 176       (*pos)
 177         += 3 + BYTES_TO_EXP_ELEM ((nargs + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT);
 178       fprintf_unfiltered (stream, "B'<unimplemented>'");
 179       return;
 180
 181     case OP_ARRAY:
 182       (*pos) += 3;
 183       nargs = longest_to_int (exp->elts[pc + 2].longconst);
 184       nargs -= longest_to_int (exp->elts[pc + 1].longconst);
 185       nargs++;
 186       tem = 0;
 187       if (exp->elts[pc + 4].opcode == OP_LONG
 188           && exp->elts[pc + 5].type == builtin_type_char
 189           && exp->language_defn->la_language == language_c)
 190         {
 191           /* Attempt to print C character arrays using string syntax.
 192              Walk through the args, picking up one character from each
 193              of the OP_LONG expression elements.  If any array element
 194              does not match our expection of what we should find for
 195              a simple string, revert back to array printing.  Note that
 196              the last expression element is an explicit null terminator
 197              byte, which doesn't get printed. */
 198           tempstr = alloca (nargs);
 199           pc += 4;
 200           while (tem < nargs)
 201             {
 202               if (exp->elts[pc].opcode != OP_LONG
 203                   || exp->elts[pc + 1].type != builtin_type_char)
 204                 {
 205                   /* Not a simple array of char, use regular array printing. */
 206                   tem = 0;
 207                   break;
 208                 }
 209               else
 210                 {
 211                   tempstr[tem++] =
 212                     longest_to_int (exp->elts[pc + 2].longconst);
 213                   pc += 4;
 214                 }
 215             }
 216         }
 217       if (tem > 0)
 218         {
 219           LA_PRINT_STRING (stream, tempstr, nargs - 1, 1, 0);
 220           (*pos) = pc;
 221         }
 222       else
 223         {
 224           int is_chill = exp->language_defn->la_language == language_chill;
 225           fputs_filtered (is_chill ? " [" : " {", stream);
 226           for (tem = 0; tem < nargs; tem++)
 227             {
 228               if (tem != 0)
 229                 {
 230                   fputs_filtered (", ", stream);
 231                 }
 232               print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
 233             }
 234           fputs_filtered (is_chill ? "]" : "}", stream);
 235         }
 236       return;
 237
 238     case OP_LABELED:
 239       tem = longest_to_int (exp->elts[pc + 1].longconst);
 240       (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
 241
 242       if (exp->language_defn->la_language == language_chill)
 243         {
 244           fputs_filtered (".", stream);
 245           fputs_filtered (&exp->elts[pc + 2].string, stream);
 246           fputs_filtered (exp->elts[*pos].opcode == OP_LABELED ? ", "
 247                           : ": ",
 248                           stream);
 249         }
 250       else
 251         {
 252           /* Gcc support both these syntaxes.  Unsure which is preferred.  */
 253 #if 1
 254           fputs_filtered (&exp->elts[pc + 2].string, stream);
 255           fputs_filtered (": ", stream);
 256 #else
 257           fputs_filtered (".", stream);
 258           fputs_filtered (&exp->elts[pc + 2].string, stream);
 259           fputs_filtered ("=", stream);
 260 #endif
 261         }
 262       print_subexp (exp, pos, stream, PREC_SUFFIX);
 263       return;
 264
 265     case TERNOP_COND:
 266       if ((int) prec > (int) PREC_COMMA)
 267         fputs_filtered ("(", stream);
 268       /* Print the subexpressions, forcing parentheses
 269          around any binary operations within them.
 270          This is more parentheses than are strictly necessary,
 271          but it looks clearer.  */
 272       print_subexp (exp, pos, stream, PREC_HYPER);
 273       fputs_filtered (" ? ", stream);
 274       print_subexp (exp, pos, stream, PREC_HYPER);
 275       fputs_filtered (" : ", stream);
 276       print_subexp (exp, pos, stream, PREC_HYPER);
 277       if ((int) prec > (int) PREC_COMMA)
 278         fputs_filtered (")", stream);
 279       return;
 280
 281     case TERNOP_SLICE:
 282     case TERNOP_SLICE_COUNT:
 283       print_subexp (exp, pos, stream, PREC_SUFFIX);
 284       fputs_filtered ("(", stream);
 285       print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
 286       fputs_filtered (opcode == TERNOP_SLICE ? " : " : " UP ", stream);
 287       print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
 288       fputs_filtered (")", stream);
 289       return;
 290
 291     case STRUCTOP_STRUCT:
 292       tem = longest_to_int (exp->elts[pc + 1].longconst);
 293       (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
 294       print_subexp (exp, pos, stream, PREC_SUFFIX);
 295       fputs_filtered (".", stream);
 296       fputs_filtered (&exp->elts[pc + 2].string, stream);
 297       return;
 298
 299       /* Will not occur for Modula-2 */
 300     case STRUCTOP_PTR:
 301       tem = longest_to_int (exp->elts[pc + 1].longconst);
 302       (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
 303       print_subexp (exp, pos, stream, PREC_SUFFIX);
 304       fputs_filtered ("->", stream);
 305       fputs_filtered (&exp->elts[pc + 2].string, stream);
 306       return;
 307
 308     case BINOP_SUBSCRIPT:
 309       print_subexp (exp, pos, stream, PREC_SUFFIX);
 310       fputs_filtered ("[", stream);
 311       print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
 312       fputs_filtered ("]", stream);
 313       return;
 314
 315     case UNOP_POSTINCREMENT:
 316       print_subexp (exp, pos, stream, PREC_SUFFIX);
 317       fputs_filtered ("++", stream);
 318       return;
 319
 320     case UNOP_POSTDECREMENT:
 321       print_subexp (exp, pos, stream, PREC_SUFFIX);
 322       fputs_filtered ("--", stream);
 323       return;
 324
 325     case UNOP_CAST:
 326       (*pos) += 2;
 327       if ((int) prec > (int) PREC_PREFIX)
 328         fputs_filtered ("(", stream);
 329       fputs_filtered ("(", stream);
 330       type_print (exp->elts[pc + 1].type, "", stream, 0);
 331       fputs_filtered (") ", stream);
 332       print_subexp (exp, pos, stream, PREC_PREFIX);
 333       if ((int) prec > (int) PREC_PREFIX)
 334         fputs_filtered (")", stream);
 335       return;
 336
 337     case UNOP_MEMVAL:
 338       (*pos) += 2;
 339       if ((int) prec > (int) PREC_PREFIX)
 340         fputs_filtered ("(", stream);
 341       if (exp->elts[pc + 1].type->code == TYPE_CODE_FUNC &&
 342           exp->elts[pc + 3].opcode == OP_LONG)
 343         {
 344           /* We have a minimal symbol fn, probably.  It's encoded
 345              as a UNOP_MEMVAL (function-type) of an OP_LONG (int, address).
 346              Swallow the OP_LONG (including both its opcodes); ignore
 347              its type; print the value in the type of the MEMVAL.  */
 348           (*pos) += 4;
 349           val = value_at_lazy (exp->elts[pc + 1].type,
 350                                (CORE_ADDR) exp->elts[pc + 5].longconst,
 351                                NULL);
 352           value_print (val, stream, 0, Val_no_prettyprint);
 353         }
 354       else
 355         {
 356           fputs_filtered ("{", stream);
 357           type_print (exp->elts[pc + 1].type, "", stream, 0);
 358           fputs_filtered ("} ", stream);
 359           print_subexp (exp, pos, stream, PREC_PREFIX);
 360         }
 361       if ((int) prec > (int) PREC_PREFIX)
 362         fputs_filtered (")", stream);
 363       return;
 364
 365     case BINOP_ASSIGN_MODIFY:
 366       opcode = exp->elts[pc + 1].opcode;
 367       (*pos) += 2;
 368       myprec = PREC_ASSIGN;
 369       assoc = 1;
 370       assign_modify = 1;
 371       op_str = "???";
 372       for (tem = 0; op_print_tab[tem].opcode != OP_NULL; tem++)
 373         if (op_print_tab[tem].opcode == opcode)
 374           {
 375             op_str = op_print_tab[tem].string;
 376             break;
 377           }
 378       if (op_print_tab[tem].opcode != opcode)
 379         /* Not found; don't try to keep going because we don't know how
 380            to interpret further elements.  */
 381         error ("Invalid expression");
 382       break;
 383
 384       /* C++ ops */
 385
 386     case OP_THIS:
 387       ++(*pos);
 388       fputs_filtered ("this", stream);
 389       return;
 390
 391       /* Modula-2 ops */
 392
 393     case MULTI_SUBSCRIPT:
 394       (*pos) += 2;
 395       nargs = longest_to_int (exp->elts[pc + 1].longconst);
 396       print_subexp (exp, pos, stream, PREC_SUFFIX);
 397       fprintf_unfiltered (stream, " [");
 398       for (tem = 0; tem < nargs; tem++)
 399         {
 400           if (tem != 0)
 401             fprintf_unfiltered (stream, ", ");
 402           print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
 403         }
 404       fprintf_unfiltered (stream, "]");
 405       return;
 406
 407     case BINOP_VAL:
 408       (*pos) += 2;
 409       fprintf_unfiltered (stream, "VAL(");
 410       type_print (exp->elts[pc + 1].type, "", stream, 0);
 411       fprintf_unfiltered (stream, ",");
 412       print_subexp (exp, pos, stream, PREC_PREFIX);
 413       fprintf_unfiltered (stream, ")");
 414       return;
 415
 416     case BINOP_INCL:
 417     case BINOP_EXCL:
 418       error ("print_subexp:  Not implemented.");
 419
 420       /* Default ops */
 421
 422     default:
 423       op_str = "???";
 424       for (tem = 0; op_print_tab[tem].opcode != OP_NULL; tem++)
 425         if (op_print_tab[tem].opcode == opcode)
 426           {
 427             op_str = op_print_tab[tem].string;
 428             myprec = op_print_tab[tem].precedence;
 429             assoc = op_print_tab[tem].right_assoc;
 430             break;
 431           }
 432       if (op_print_tab[tem].opcode != opcode)
 433         /* Not found; don't try to keep going because we don't know how
 434            to interpret further elements.  For example, this happens
 435            if opcode is OP_TYPE.  */
 436         error ("Invalid expression");
 437     }
 438
 439   /* Note that PREC_BUILTIN will always emit parentheses. */
 440   if ((int) myprec < (int) prec)
 441     fputs_filtered ("(", stream);
 442   if ((int) opcode > (int) BINOP_END)
 443     {
 444       if (assoc)
 445         {
 446           /* Unary postfix operator.  */
 447           print_subexp (exp, pos, stream, PREC_SUFFIX);
 448           fputs_filtered (op_str, stream);
 449         }
 450       else
 451         {
 452           /* Unary prefix operator.  */
 453           fputs_filtered (op_str, stream);
 454           if (myprec == PREC_BUILTIN_FUNCTION)
 455             fputs_filtered ("(", stream);
 456           print_subexp (exp, pos, stream, PREC_PREFIX);
 457           if (myprec == PREC_BUILTIN_FUNCTION)
 458             fputs_filtered (")", stream);
 459         }
 460     }
 461   else
 462     {
 463       /* Binary operator.  */
 464       /* Print left operand.
 465          If operator is right-associative,
 466          increment precedence for this operand.  */
 467       print_subexp (exp, pos, stream,
 468                     (enum precedence) ((int) myprec + assoc));
 469       /* Print the operator itself.  */
 470       if (assign_modify)
 471         fprintf_filtered (stream, " %s= ", op_str);
 472       else if (op_str[0] == ',')
 473         fprintf_filtered (stream, "%s ", op_str);
 474       else
 475         fprintf_filtered (stream, " %s ", op_str);
 476       /* Print right operand.
 477          If operator is left-associative,
 478          increment precedence for this operand.  */
 479       print_subexp (exp, pos, stream,
 480                     (enum precedence) ((int) myprec + !assoc));
 481     }
 482
 483   if ((int) myprec < (int) prec)
 484     fputs_filtered (")", stream);
 485 }
 486
 487 /* Return the operator corresponding to opcode OP as
 488    a string.   NULL indicates that the opcode was not found in the
 489    current language table.  */
 490 char *
 491 op_string (op)
 492      enum exp_opcode op;
 493 {
 494   int tem;
 495   register const struct op_print *op_print_tab;
 496
 497   op_print_tab = current_language->la_op_print_tab;
 498   for (tem = 0; op_print_tab[tem].opcode != OP_NULL; tem++)
 499     if (op_print_tab[tem].opcode == op)
 500       return op_print_tab[tem].string;
 501   return NULL;
 502 }
 503
 504 /* Support for dumping the raw data from expressions in a human readable
 505    form.  */
 506
 507 static char *op_name PARAMS ((int opcode));
 508
 509 static char *
 510 op_name (opcode)
 511      int opcode;
 512 {
 513   switch (opcode)
 514     {
 515     default:
 516       {
 517         static char buf[30];
 518
 519         sprintf (buf, "<unknown %d>", opcode);
 520         return buf;
 521       }
 522     case OP_NULL:
 523       return "OP_NULL";
 524     case BINOP_ADD:
 525       return "BINOP_ADD";
 526     case BINOP_SUB:
 527       return "BINOP_SUB";
 528     case BINOP_MUL:
 529       return "BINOP_MUL";
 530     case BINOP_DIV:
 531       return "BINOP_DIV";
 532     case BINOP_REM:
 533       return "BINOP_REM";
 534     case BINOP_MOD:
 535       return "BINOP_MOD";
 536     case BINOP_LSH:
 537       return "BINOP_LSH";
 538     case BINOP_RSH:
 539       return "BINOP_RSH";
 540     case BINOP_LOGICAL_AND:
 541       return "BINOP_LOGICAL_AND";
 542     case BINOP_LOGICAL_OR:
 543       return "BINOP_LOGICAL_OR";
 544     case BINOP_BITWISE_AND:
 545       return "BINOP_BITWISE_AND";
 546     case BINOP_BITWISE_IOR:
 547       return "BINOP_BITWISE_IOR";
 548     case BINOP_BITWISE_XOR:
 549       return "BINOP_BITWISE_XOR";
 550     case BINOP_EQUAL:
 551       return "BINOP_EQUAL";
 552     case BINOP_NOTEQUAL:
 553       return "BINOP_NOTEQUAL";
 554     case BINOP_LESS:
 555       return "BINOP_LESS";
 556     case BINOP_GTR:
 557       return "BINOP_GTR";
 558     case BINOP_LEQ:
 559       return "BINOP_LEQ";
 560     case BINOP_GEQ:
 561       return "BINOP_GEQ";
 562     case BINOP_REPEAT:
 563       return "BINOP_REPEAT";
 564     case BINOP_ASSIGN:
 565       return "BINOP_ASSIGN";
 566     case BINOP_COMMA:
 567       return "BINOP_COMMA";
 568     case BINOP_SUBSCRIPT:
 569       return "BINOP_SUBSCRIPT";
 570     case MULTI_SUBSCRIPT:
 571       return "MULTI_SUBSCRIPT";
 572     case BINOP_EXP:
 573       return "BINOP_EXP";
 574     case BINOP_MIN:
 575       return "BINOP_MIN";
 576     case BINOP_MAX:
 577       return "BINOP_MAX";
 578     case BINOP_SCOPE:
 579       return "BINOP_SCOPE";
 580     case STRUCTOP_MEMBER:
 581       return "STRUCTOP_MEMBER";
 582     case STRUCTOP_MPTR:
 583       return "STRUCTOP_MPTR";
 584     case BINOP_INTDIV:
 585       return "BINOP_INTDIV";
 586     case BINOP_ASSIGN_MODIFY:
 587       return "BINOP_ASSIGN_MODIFY";
 588     case BINOP_VAL:
 589       return "BINOP_VAL";
 590     case BINOP_INCL:
 591       return "BINOP_INCL";
 592     case BINOP_EXCL:
 593       return "BINOP_EXCL";
 594     case BINOP_CONCAT:
 595       return "BINOP_CONCAT";
 596     case BINOP_RANGE:
 597       return "BINOP_RANGE";
 598     case BINOP_END:
 599       return "BINOP_END";
 600     case TERNOP_COND:
 601       return "TERNOP_COND";
 602     case TERNOP_SLICE:
 603       return "TERNOP_SLICE";
 604     case TERNOP_SLICE_COUNT:
 605       return "TERNOP_SLICE_COUNT";
 606     case OP_LONG:
 607       return "OP_LONG";
 608     case OP_DOUBLE:
 609       return "OP_DOUBLE";
 610     case OP_VAR_VALUE:
 611       return "OP_VAR_VALUE";
 612     case OP_LAST:
 613       return "OP_LAST";
 614     case OP_REGISTER:
 615       return "OP_REGISTER";
 616     case OP_INTERNALVAR:
 617       return "OP_INTERNALVAR";
 618     case OP_FUNCALL:
 619       return "OP_FUNCALL";
 620     case OP_STRING:
 621       return "OP_STRING";
 622     case OP_BITSTRING:
 623       return "OP_BITSTRING";
 624     case OP_ARRAY:
 625       return "OP_ARRAY";
 626     case UNOP_CAST:
 627       return "UNOP_CAST";
 628     case UNOP_MEMVAL:
 629       return "UNOP_MEMVAL";
 630     case UNOP_NEG:
 631       return "UNOP_NEG";
 632     case UNOP_LOGICAL_NOT:
 633       return "UNOP_LOGICAL_NOT";
 634     case UNOP_COMPLEMENT:
 635       return "UNOP_COMPLEMENT";
 636     case UNOP_IND:
 637       return "UNOP_IND";
 638     case UNOP_ADDR:
 639       return "UNOP_ADDR";
 640     case UNOP_PREINCREMENT:
 641       return "UNOP_PREINCREMENT";
 642     case UNOP_POSTINCREMENT:
 643       return "UNOP_POSTINCREMENT";
 644     case UNOP_PREDECREMENT:
 645       return "UNOP_PREDECREMENT";
 646     case UNOP_POSTDECREMENT:
 647       return "UNOP_POSTDECREMENT";
 648     case UNOP_SIZEOF:
 649       return "UNOP_SIZEOF";
 650     case UNOP_LOWER:
 651       return "UNOP_LOWER";
 652     case UNOP_UPPER:
 653       return "UNOP_UPPER";
 654     case UNOP_LENGTH:
 655       return "UNOP_LENGTH";
 656     case UNOP_PLUS:
 657       return "UNOP_PLUS";
 658     case UNOP_CAP:
 659       return "UNOP_CAP";
 660     case UNOP_CHR:
 661       return "UNOP_CHR";
 662     case UNOP_ORD:
 663       return "UNOP_ORD";
 664     case UNOP_ABS:
 665       return "UNOP_ABS";
 666     case UNOP_FLOAT:
 667       return "UNOP_FLOAT";
 668     case UNOP_HIGH:
 669       return "UNOP_HIGH";
 670     case UNOP_MAX:
 671       return "UNOP_MAX";
 672     case UNOP_MIN:
 673       return "UNOP_MIN";
 674     case UNOP_ODD:
 675       return "UNOP_ODD";
 676     case UNOP_TRUNC:
 677       return "UNOP_TRUNC";
 678     case OP_BOOL:
 679       return "OP_BOOL";
 680     case OP_M2_STRING:
 681       return "OP_M2_STRING";
 682     case STRUCTOP_STRUCT:
 683       return "STRUCTOP_STRUCT";
 684     case STRUCTOP_PTR:
 685       return "STRUCTOP_PTR";
 686     case OP_THIS:
 687       return "OP_THIS";
 688     case OP_SCOPE:
 689       return "OP_SCOPE";
 690     case OP_TYPE:
 691       return "OP_TYPE";
 692     case OP_LABELED:
 693       return "OP_LABELED";
 694     }
 695 }
 696
 697 void
 698 dump_prefix_expression (exp, stream, note)
 699      struct expression *exp;
 700      GDB_FILE *stream;
 701      char *note;
 702 {
 703   int elt;
 704   char *opcode_name;
 705   char *eltscan;
 706   int eltsize;
 707
 708   fprintf_filtered (stream, "Dump of expression @ ");
 709   gdb_print_address (exp, stream);
 710   fprintf_filtered (stream, ", %s:\nExpression: `", note);
 711   if (exp->elts[0].opcode != OP_TYPE)
 712     print_expression (exp, stream);
 713   else
 714     fprintf_filtered (stream, "Type printing not yet supported....");
 715   fprintf_filtered (stream, "'\n\tLanguage %s, %d elements, %d bytes each.\n",
 716                     exp->language_defn->la_name, exp->nelts,
 717                     sizeof (union exp_element));
 718   fprintf_filtered (stream, "\t%5s  %20s  %16s  %s\n", "Index", "Opcode",
 719                     "Hex Value", "String Value");
 720   for (elt = 0; elt < exp->nelts; elt++)
 721     {
 722       fprintf_filtered (stream, "\t%5d  ", elt);
 723       opcode_name = op_name (exp->elts[elt].opcode);
 724
 725       fprintf_filtered (stream, "%20s  ", opcode_name);
 726       print_longest (stream, 'd', 0, exp->elts[elt].longconst);
 727       fprintf_filtered (stream, "  ");
 728
 729       for (eltscan = (char *) &exp->elts[elt],
 730            eltsize = sizeof (union exp_element);
 731            eltsize-- > 0;
 732            eltscan++)
 733         {
 734           fprintf_filtered (stream, "%c",
 735                             isprint (*eltscan) ? (*eltscan & 0xFF) : '.');
 736         }
 737       fprintf_filtered (stream, "\n");
 738     }
 739 }
 740
 741 static int dump_subexp PARAMS ((struct expression * exp, GDB_FILE * stream, int elt));
 742
 743 static int
 744 dump_subexp (exp, stream, elt)
 745      struct expression *exp;
 746      GDB_FILE *stream;
 747      int elt;
 748 {
 749   static int indent = 0;
 750   int i;
 751
 752   fprintf_filtered (stream, "\n");
 753   fprintf_filtered (stream, "\t%5d  ", elt);
 754
 755   for (i = 1; i <= indent; i++)
 756     fprintf_filtered (stream, " ");
 757   indent += 2;
 758
 759   fprintf_filtered (stream, "%-20s  ", op_name (exp->elts[elt].opcode));
 760
 761   switch (exp->elts[elt++].opcode)
 762     {
 763     case TERNOP_COND:
 764     case TERNOP_SLICE:
 765     case TERNOP_SLICE_COUNT:
 766       elt = dump_subexp (exp, stream, elt);
 767     case BINOP_ADD:
 768     case BINOP_SUB:
 769     case BINOP_MUL:
 770     case BINOP_DIV:
 771     case BINOP_REM:
 772     case BINOP_MOD:
 773     case BINOP_LSH:
 774     case BINOP_RSH:
 775     case BINOP_LOGICAL_AND:
 776     case BINOP_LOGICAL_OR:
 777     case BINOP_BITWISE_AND:
 778     case BINOP_BITWISE_IOR:
 779     case BINOP_BITWISE_XOR:
 780     case BINOP_EQUAL:
 781     case BINOP_NOTEQUAL:
 782     case BINOP_LESS:
 783     case BINOP_GTR:
 784     case BINOP_LEQ:
 785     case BINOP_GEQ:
 786     case BINOP_REPEAT:
 787     case BINOP_ASSIGN:
 788     case BINOP_COMMA:
 789     case BINOP_SUBSCRIPT:
 790     case BINOP_EXP:
 791     case BINOP_MIN:
 792     case BINOP_MAX:
 793     case BINOP_SCOPE:
 794     case BINOP_INTDIV:
 795     case BINOP_ASSIGN_MODIFY:
 796     case BINOP_VAL:
 797     case BINOP_INCL:
 798     case BINOP_EXCL:
 799     case BINOP_CONCAT:
 800     case BINOP_IN:
 801     case BINOP_RANGE:
 802     case BINOP_END:
 803       elt = dump_subexp (exp, stream, elt);
 804     case UNOP_NEG:
 805     case UNOP_LOGICAL_NOT:
 806     case UNOP_COMPLEMENT:
 807     case UNOP_IND:
 808     case UNOP_ADDR:
 809     case UNOP_PREINCREMENT:
 810     case UNOP_POSTINCREMENT:
 811     case UNOP_PREDECREMENT:
 812     case UNOP_POSTDECREMENT:
 813     case UNOP_SIZEOF:
 814     case UNOP_PLUS:
 815     case UNOP_CAP:
 816     case UNOP_CHR:
 817     case UNOP_ORD:
 818     case UNOP_ABS:
 819     case UNOP_FLOAT:
 820     case UNOP_HIGH:
 821     case UNOP_MAX:
 822     case UNOP_MIN:
 823     case UNOP_ODD:
 824     case UNOP_TRUNC:
 825     case UNOP_LOWER:
 826     case UNOP_UPPER:
 827     case UNOP_LENGTH:
 828     case UNOP_CARD:
 829     case UNOP_CHMAX:
 830     case UNOP_CHMIN:
 831       elt = dump_subexp (exp, stream, elt);
 832       break;
 833     case OP_LONG:
 834       fprintf_filtered (stream, "Type @0x%x (", exp->elts[elt].type);
 835       type_print (exp->elts[elt].type, NULL, stream, 0);
 836       fprintf_filtered (stream, "), value %ld (0x%lx)",
 837                         (long) exp->elts[elt + 1].longconst,
 838                         (long) exp->elts[elt + 1].longconst);
 839       elt += 3;
 840       break;
 841     case OP_DOUBLE:
 842       fprintf_filtered (stream, "Type @0x%x (", exp->elts[elt].type);
 843       type_print (exp->elts[elt].type, NULL, stream, 0);
 844       fprintf_filtered (stream, "), value %g",
 845                         (double) exp->elts[elt + 1].doubleconst);
 846       elt += 3;
 847       break;
 848     case OP_VAR_VALUE:
 849       fprintf_filtered (stream, "Block @0x%x, symbol @0x%x (%s)",
 850                         exp->elts[elt].block,
 851                         exp->elts[elt + 1].symbol,
 852                         SYMBOL_NAME (exp->elts[elt + 1].symbol));
 853       elt += 3;
 854       break;
 855     case OP_LAST:
 856       fprintf_filtered (stream, "History element %ld",
 857                         (long) exp->elts[elt].longconst);
 858       elt += 2;
 859       break;
 860     case OP_REGISTER:
 861       fprintf_filtered (stream, "Register %ld",
 862                         (long) exp->elts[elt].longconst);
 863       elt += 2;
 864       break;
 865     case OP_INTERNALVAR:
 866       fprintf_filtered (stream, "Internal var @0x%x (%s)",
 867                         exp->elts[elt].internalvar,
 868                         exp->elts[elt].internalvar->name);
 869       elt += 2;
 870       break;
 871     case OP_FUNCALL:
 872       {
 873         int nargs;
 874
 875         nargs = longest_to_int (exp->elts[elt].longconst);
 876
 877         fprintf_filtered (stream, "Number of args: %d", nargs);
 878         elt += 2;
 879
 880         for (i = 1; i <= nargs + 1; i++)
 881           elt = dump_subexp (exp, stream, elt);
 882       }
 883       break;
 884     case OP_ARRAY:
 885       {
 886         int lower, upper;
 887         int i;
 888
 889         lower = longest_to_int (exp->elts[elt].longconst);
 890         upper = longest_to_int (exp->elts[elt + 1].longconst);
 891
 892         fprintf_filtered (stream, "Bounds [%d:%d]", lower, upper);
 893         elt += 3;
 894
 895         for (i = 1; i <= upper - lower + 1; i++)
 896           elt = dump_subexp (exp, stream, elt);
 897       }
 898       break;
 899     case UNOP_MEMVAL:
 900     case UNOP_CAST:
 901       fprintf_filtered (stream, "Type @0x%x (",
 902                         exp->elts[elt].type);
 903       type_print (exp->elts[elt].type, NULL, stream, 0);
 904       fprintf_filtered (stream, ")");
 905       elt = dump_subexp (exp, stream, elt + 2);
 906       break;
 907     case OP_TYPE:
 908       fprintf_filtered (stream, "Type @0x%x (",
 909                         exp->elts[elt].type);
 910       type_print (exp->elts[elt].type, NULL, stream, 0);
 911       fprintf_filtered (stream, ")");
 912       elt += 2;
 913       break;
 914     case STRUCTOP_STRUCT:
 915     case STRUCTOP_PTR:
 916       {
 917         char *elem_name;
 918         int len;
 919
 920         len = longest_to_int (exp->elts[elt].longconst);
 921         elem_name = &exp->elts[elt + 1].string;
 922
 923         fprintf_filtered (stream, "Element name: `%.*s'", len, elem_name);
 924         elt = dump_subexp (exp, stream, elt + 3 + BYTES_TO_EXP_ELEM (len + 1));
 925       }
 926       break;
 927     case OP_SCOPE:
 928       {
 929         char *elem_name;
 930         int len;
 931
 932         fprintf_filtered (stream, "Type @0x%x (", exp->elts[elt].type);
 933         type_print (exp->elts[elt].type, NULL, stream, 0);
 934         fprintf_filtered (stream, ") ");
 935
 936         len = longest_to_int (exp->elts[elt + 1].longconst);
 937         elem_name = &exp->elts[elt + 2].string;
 938
 939         fprintf_filtered (stream, "Field name: `%.*s'", len, elem_name);
 940         elt += 4 + BYTES_TO_EXP_ELEM (len + 1);
 941       }
 942       break;
 943     default:
 944     case OP_NULL:
 945     case STRUCTOP_MEMBER:
 946     case STRUCTOP_MPTR:
 947     case MULTI_SUBSCRIPT:
 948     case OP_F77_UNDETERMINED_ARGLIST:
 949     case OP_COMPLEX:
 950     case OP_STRING:
 951     case OP_BITSTRING:
 952     case OP_BOOL:
 953     case OP_M2_STRING:
 954     case OP_THIS:
 955     case OP_LABELED:
 956     case OP_NAME:
 957     case OP_EXPRSTRING:
 958       fprintf_filtered (stream, "Unknown format");
 959     }
 960
 961   indent -= 2;
 962
 963   return elt;
 964 }
 965
 966 void
 967 dump_postfix_expression (exp, stream, note)
 968      struct expression *exp;
 969      GDB_FILE *stream;
 970      char *note;
 971 {
 972   int elt;
 973
 974   fprintf_filtered (stream, "Dump of expression @ ");
 975   gdb_print_address (exp, stream);
 976   fprintf_filtered (stream, ", %s:\nExpression: `", note);
 977   if (exp->elts[0].opcode != OP_TYPE)
 978     print_expression (exp, stream);
 979   else
 980     fputs_filtered ("Type printing not yet supported....", stream);
 981   fprintf_filtered (stream, "'\n\tLanguage %s, %d elements, %d bytes each.\n",
 982                     exp->language_defn->la_name, exp->nelts,
 983                     sizeof (union exp_element));
 984   fputs_filtered ("\n", stream);
 985
 986   for (elt = 0; elt < exp->nelts;)
 987     elt = dump_subexp (exp, stream, elt);
 988   fputs_filtered ("\n", stream);
 989 }