gdb/expprint.c

   1 /* Print in infix form a struct expression.
   2
   3    Copyright 1986, 1988, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
   4    1998, 1999, 2000, 2003 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 2 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, write to the Free Software
  20    Foundation, Inc., 59 Temple Place - Suite 330,
  21    Boston, MA 02111-1307, USA.  */
  22
  23 #include "defs.h"
  24 #include "symtab.h"
  25 #include "gdbtypes.h"
  26 #include "expression.h"
  27 #include "value.h"
  28 #include "language.h"
  29 #include "parser-defs.h"
  30 #include "frame.h"              /* For frame_map_regnum_to_name.  */
  31 #include "target.h"
  32 #include "gdb_string.h"
  33
  34 #ifdef HAVE_CTYPE_H
  35 #include <ctype.h>
  36 #endif
  37
  38 /* Prototypes for local functions */
  39
  40 static void print_subexp (struct expression *, int *, struct ui_file *,
  41                           enum precedence);
  42
  43 void
  44 print_expression (struct expression *exp, struct ui_file *stream)
  45 {
  46   int pc = 0;
  47   print_subexp (exp, &pc, stream, PREC_NULL);
  48 }
  49
  50 /* Print the subexpression of EXP that starts in position POS, on STREAM.
  51    PREC is the precedence of the surrounding operator;
  52    if the precedence of the main operator of this subexpression is less,
  53    parentheses are needed here.  */
  54
  55 static void
  56 print_subexp (register struct expression *exp, register int *pos,
  57               struct ui_file *stream, 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   struct value *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, "$%d",
 122                         longest_to_int (exp->elts[pc + 1].longconst));
 123       return;
 124
 125     case OP_REGISTER:
 126       {
 127         int regnum = longest_to_int (exp->elts[pc + 1].longconst);
 128         (*pos) += 2;
 129         fprintf_filtered (stream, "$%s", frame_map_regnum_to_name (regnum));
 130         return;
 131       }
 132
 133     case OP_BOOL:
 134       (*pos) += 2;
 135       fprintf_filtered (stream, "%s",
 136                         longest_to_int (exp->elts[pc + 1].longconst)
 137                         ? "TRUE" : "FALSE");
 138       return;
 139
 140     case OP_INTERNALVAR:
 141       (*pos) += 2;
 142       fprintf_filtered (stream, "$%s",
 143                         internalvar_name (exp->elts[pc + 1].internalvar));
 144       return;
 145
 146     case OP_FUNCALL:
 147       (*pos) += 2;
 148       nargs = longest_to_int (exp->elts[pc + 1].longconst);
 149       print_subexp (exp, pos, stream, PREC_SUFFIX);
 150       fputs_filtered (" (", stream);
 151       for (tem = 0; tem < nargs; tem++)
 152         {
 153           if (tem != 0)
 154             fputs_filtered (", ", stream);
 155           print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
 156         }
 157       fputs_filtered (")", stream);
 158       return;
 159
 160     case OP_NAME:
 161     case OP_EXPRSTRING:
 162       nargs = longest_to_int (exp->elts[pc + 1].longconst);
 163       (*pos) += 3 + BYTES_TO_EXP_ELEM (nargs + 1);
 164       fputs_filtered (&exp->elts[pc + 2].string, stream);
 165       return;
 166
 167     case OP_STRING:
 168       nargs = longest_to_int (exp->elts[pc + 1].longconst);
 169       (*pos) += 3 + BYTES_TO_EXP_ELEM (nargs + 1);
 170       /* LA_PRINT_STRING will print using the current repeat count threshold.
 171          If necessary, we can temporarily set it to zero, or pass it as an
 172          additional parameter to LA_PRINT_STRING.  -fnf */
 173       LA_PRINT_STRING (stream, &exp->elts[pc + 2].string, nargs, 1, 0);
 174       return;
 175
 176     case OP_BITSTRING:
 177       nargs = longest_to_int (exp->elts[pc + 1].longconst);
 178       (*pos)
 179         += 3 + BYTES_TO_EXP_ELEM ((nargs + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT);
 180       fprintf_unfiltered (stream, "B'<unimplemented>'");
 181       return;
 182
 183     case OP_OBJC_NSSTRING:      /* Objective-C Foundation Class NSString constant.  */
 184       nargs = longest_to_int (exp->elts[pc + 1].longconst);
 185       (*pos) += 3 + BYTES_TO_EXP_ELEM (nargs + 1);
 186       fputs_filtered ("@\"", stream);
 187       LA_PRINT_STRING (stream, &exp->elts[pc + 2].string, nargs, 1, 0);
 188       fputs_filtered ("\"", stream);
 189       return;
 190
 191     case OP_OBJC_MSGCALL:
 192       {                 /* Objective C message (method) call.  */
 193         char *selector;
 194         (*pos) += 3;
 195         nargs = longest_to_int (exp->elts[pc + 2].longconst);
 196         fprintf_unfiltered (stream, "[");
 197         print_subexp (exp, pos, stream, PREC_SUFFIX);
 198         if (0 == target_read_string (exp->elts[pc + 1].longconst,
 199                                      &selector, 1024, NULL))
 200           {
 201             error ("bad selector");
 202             return;
 203           }
 204         if (nargs)
 205           {
 206             char *s, *nextS;
 207             s = alloca (strlen (selector) + 1);
 208             strcpy (s, selector);
 209             for (tem = 0; tem < nargs; tem++)
 210               {
 211                 nextS = strchr (s, ':');
 212                 *nextS = '\0';
 213                 fprintf_unfiltered (stream, " %s: ", s);
 214                 s = nextS + 1;
 215                 print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
 216               }
 217           }
 218         else
 219           {
 220             fprintf_unfiltered (stream, " %s", selector);
 221           }
 222         fprintf_unfiltered (stream, "]");
 223         /* "selector" was malloc'd by target_read_string. Free it.  */
 224         xfree (selector);
 225         return;
 226       }
 227
 228     case OP_ARRAY:
 229       (*pos) += 3;
 230       nargs = longest_to_int (exp->elts[pc + 2].longconst);
 231       nargs -= longest_to_int (exp->elts[pc + 1].longconst);
 232       nargs++;
 233       tem = 0;
 234       if (exp->elts[pc + 4].opcode == OP_LONG
 235           && exp->elts[pc + 5].type == builtin_type_char
 236           && exp->language_defn->la_language == language_c)
 237         {
 238           /* Attempt to print C character arrays using string syntax.
 239              Walk through the args, picking up one character from each
 240              of the OP_LONG expression elements.  If any array element
 241              does not match our expection of what we should find for
 242              a simple string, revert back to array printing.  Note that
 243              the last expression element is an explicit null terminator
 244              byte, which doesn't get printed. */
 245           tempstr = alloca (nargs);
 246           pc += 4;
 247           while (tem < nargs)
 248             {
 249               if (exp->elts[pc].opcode != OP_LONG
 250                   || exp->elts[pc + 1].type != builtin_type_char)
 251                 {
 252                   /* Not a simple array of char, use regular array printing. */
 253                   tem = 0;
 254                   break;
 255                 }
 256               else
 257                 {
 258                   tempstr[tem++] =
 259                     longest_to_int (exp->elts[pc + 2].longconst);
 260                   pc += 4;
 261                 }
 262             }
 263         }
 264       if (tem > 0)
 265         {
 266           LA_PRINT_STRING (stream, tempstr, nargs - 1, 1, 0);
 267           (*pos) = pc;
 268         }
 269       else
 270         {
 271           fputs_filtered (" {", stream);
 272           for (tem = 0; tem < nargs; tem++)
 273             {
 274               if (tem != 0)
 275                 {
 276                   fputs_filtered (", ", stream);
 277                 }
 278               print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
 279             }
 280           fputs_filtered ("}", stream);
 281         }
 282       return;
 283
 284     case OP_LABELED:
 285       tem = longest_to_int (exp->elts[pc + 1].longconst);
 286       (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
 287       /* Gcc support both these syntaxes.  Unsure which is preferred.  */
 288 #if 1
 289       fputs_filtered (&exp->elts[pc + 2].string, stream);
 290       fputs_filtered (": ", stream);
 291 #else
 292       fputs_filtered (".", stream);
 293       fputs_filtered (&exp->elts[pc + 2].string, stream);
 294       fputs_filtered ("=", stream);
 295 #endif
 296       print_subexp (exp, pos, stream, PREC_SUFFIX);
 297       return;
 298
 299     case TERNOP_COND:
 300       if ((int) prec > (int) PREC_COMMA)
 301         fputs_filtered ("(", stream);
 302       /* Print the subexpressions, forcing parentheses
 303          around any binary operations within them.
 304          This is more parentheses than are strictly necessary,
 305          but it looks clearer.  */
 306       print_subexp (exp, pos, stream, PREC_HYPER);
 307       fputs_filtered (" ? ", stream);
 308       print_subexp (exp, pos, stream, PREC_HYPER);
 309       fputs_filtered (" : ", stream);
 310       print_subexp (exp, pos, stream, PREC_HYPER);
 311       if ((int) prec > (int) PREC_COMMA)
 312         fputs_filtered (")", stream);
 313       return;
 314
 315     case TERNOP_SLICE:
 316     case TERNOP_SLICE_COUNT:
 317       print_subexp (exp, pos, stream, PREC_SUFFIX);
 318       fputs_filtered ("(", stream);
 319       print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
 320       fputs_filtered (opcode == TERNOP_SLICE ? " : " : " UP ", stream);
 321       print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
 322       fputs_filtered (")", stream);
 323       return;
 324
 325     case STRUCTOP_STRUCT:
 326       tem = longest_to_int (exp->elts[pc + 1].longconst);
 327       (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
 328       print_subexp (exp, pos, stream, PREC_SUFFIX);
 329       fputs_filtered (".", stream);
 330       fputs_filtered (&exp->elts[pc + 2].string, stream);
 331       return;
 332
 333       /* Will not occur for Modula-2 */
 334     case STRUCTOP_PTR:
 335       tem = longest_to_int (exp->elts[pc + 1].longconst);
 336       (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
 337       print_subexp (exp, pos, stream, PREC_SUFFIX);
 338       fputs_filtered ("->", stream);
 339       fputs_filtered (&exp->elts[pc + 2].string, stream);
 340       return;
 341
 342     case BINOP_SUBSCRIPT:
 343       print_subexp (exp, pos, stream, PREC_SUFFIX);
 344       fputs_filtered ("[", stream);
 345       print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
 346       fputs_filtered ("]", stream);
 347       return;
 348
 349     case UNOP_POSTINCREMENT:
 350       print_subexp (exp, pos, stream, PREC_SUFFIX);
 351       fputs_filtered ("++", stream);
 352       return;
 353
 354     case UNOP_POSTDECREMENT:
 355       print_subexp (exp, pos, stream, PREC_SUFFIX);
 356       fputs_filtered ("--", stream);
 357       return;
 358
 359     case UNOP_CAST:
 360       (*pos) += 2;
 361       if ((int) prec > (int) PREC_PREFIX)
 362         fputs_filtered ("(", stream);
 363       fputs_filtered ("(", stream);
 364       type_print (exp->elts[pc + 1].type, "", stream, 0);
 365       fputs_filtered (") ", stream);
 366       print_subexp (exp, pos, stream, PREC_PREFIX);
 367       if ((int) prec > (int) PREC_PREFIX)
 368         fputs_filtered (")", stream);
 369       return;
 370
 371     case UNOP_MEMVAL:
 372       (*pos) += 2;
 373       if ((int) prec > (int) PREC_PREFIX)
 374         fputs_filtered ("(", stream);
 375       if (TYPE_CODE (exp->elts[pc + 1].type) == TYPE_CODE_FUNC &&
 376           exp->elts[pc + 3].opcode == OP_LONG)
 377         {
 378           /* We have a minimal symbol fn, probably.  It's encoded
 379              as a UNOP_MEMVAL (function-type) of an OP_LONG (int, address).
 380              Swallow the OP_LONG (including both its opcodes); ignore
 381              its type; print the value in the type of the MEMVAL.  */
 382           (*pos) += 4;
 383           val = value_at_lazy (exp->elts[pc + 1].type,
 384                                (CORE_ADDR) exp->elts[pc + 5].longconst,
 385                                NULL);
 386           value_print (val, stream, 0, Val_no_prettyprint);
 387         }
 388       else
 389         {
 390           fputs_filtered ("{", stream);
 391           type_print (exp->elts[pc + 1].type, "", stream, 0);
 392           fputs_filtered ("} ", stream);
 393           print_subexp (exp, pos, stream, PREC_PREFIX);
 394         }
 395       if ((int) prec > (int) PREC_PREFIX)
 396         fputs_filtered (")", stream);
 397       return;
 398
 399     case BINOP_ASSIGN_MODIFY:
 400       opcode = exp->elts[pc + 1].opcode;
 401       (*pos) += 2;
 402       myprec = PREC_ASSIGN;
 403       assoc = 1;
 404       assign_modify = 1;
 405       op_str = "???";
 406       for (tem = 0; op_print_tab[tem].opcode != OP_NULL; tem++)
 407         if (op_print_tab[tem].opcode == opcode)
 408           {
 409             op_str = op_print_tab[tem].string;
 410             break;
 411           }
 412       if (op_print_tab[tem].opcode != opcode)
 413         /* Not found; don't try to keep going because we don't know how
 414            to interpret further elements.  */
 415         error ("Invalid expression");
 416       break;
 417
 418       /* C++ ops */
 419
 420     case OP_THIS:
 421       ++(*pos);
 422       fputs_filtered ("this", stream);
 423       return;
 424
 425       /* Objective-C ops */
 426
 427     case OP_OBJC_SELF:
 428       ++(*pos);
 429       fputs_filtered ("self", stream);  /* The ObjC equivalent of "this".  */
 430       return;
 431
 432       /* Modula-2 ops */
 433
 434     case MULTI_SUBSCRIPT:
 435       (*pos) += 2;
 436       nargs = longest_to_int (exp->elts[pc + 1].longconst);
 437       print_subexp (exp, pos, stream, PREC_SUFFIX);
 438       fprintf_unfiltered (stream, " [");
 439       for (tem = 0; tem < nargs; tem++)
 440         {
 441           if (tem != 0)
 442             fprintf_unfiltered (stream, ", ");
 443           print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
 444         }
 445       fprintf_unfiltered (stream, "]");
 446       return;
 447
 448     case BINOP_VAL:
 449       (*pos) += 2;
 450       fprintf_unfiltered (stream, "VAL(");
 451       type_print (exp->elts[pc + 1].type, "", stream, 0);
 452       fprintf_unfiltered (stream, ",");
 453       print_subexp (exp, pos, stream, PREC_PREFIX);
 454       fprintf_unfiltered (stream, ")");
 455       return;
 456
 457     case BINOP_INCL:
 458     case BINOP_EXCL:
 459       error ("print_subexp:  Not implemented.");
 460
 461       /* Default ops */
 462
 463     default:
 464       op_str = "???";
 465       for (tem = 0; op_print_tab[tem].opcode != OP_NULL; tem++)
 466         if (op_print_tab[tem].opcode == opcode)
 467           {
 468             op_str = op_print_tab[tem].string;
 469             myprec = op_print_tab[tem].precedence;
 470             assoc = op_print_tab[tem].right_assoc;
 471             break;
 472           }
 473       if (op_print_tab[tem].opcode != opcode)
 474         /* Not found; don't try to keep going because we don't know how
 475            to interpret further elements.  For example, this happens
 476            if opcode is OP_TYPE.  */
 477         error ("Invalid expression");
 478     }
 479
 480   /* Note that PREC_BUILTIN will always emit parentheses. */
 481   if ((int) myprec < (int) prec)
 482     fputs_filtered ("(", stream);
 483   if ((int) opcode > (int) BINOP_END)
 484     {
 485       if (assoc)
 486         {
 487           /* Unary postfix operator.  */
 488           print_subexp (exp, pos, stream, PREC_SUFFIX);
 489           fputs_filtered (op_str, stream);
 490         }
 491       else
 492         {
 493           /* Unary prefix operator.  */
 494           fputs_filtered (op_str, stream);
 495           if (myprec == PREC_BUILTIN_FUNCTION)
 496             fputs_filtered ("(", stream);
 497           print_subexp (exp, pos, stream, PREC_PREFIX);
 498           if (myprec == PREC_BUILTIN_FUNCTION)
 499             fputs_filtered (")", stream);
 500         }
 501     }
 502   else
 503     {
 504       /* Binary operator.  */
 505       /* Print left operand.
 506          If operator is right-associative,
 507          increment precedence for this operand.  */
 508       print_subexp (exp, pos, stream,
 509                     (enum precedence) ((int) myprec + assoc));
 510       /* Print the operator itself.  */
 511       if (assign_modify)
 512         fprintf_filtered (stream, " %s= ", op_str);
 513       else if (op_str[0] == ',')
 514         fprintf_filtered (stream, "%s ", op_str);
 515       else
 516         fprintf_filtered (stream, " %s ", op_str);
 517       /* Print right operand.
 518          If operator is left-associative,
 519          increment precedence for this operand.  */
 520       print_subexp (exp, pos, stream,
 521                     (enum precedence) ((int) myprec + !assoc));
 522     }
 523
 524   if ((int) myprec < (int) prec)
 525     fputs_filtered (")", stream);
 526 }
 527
 528 /* Return the operator corresponding to opcode OP as
 529    a string.   NULL indicates that the opcode was not found in the
 530    current language table.  */
 531 char *
 532 op_string (enum exp_opcode op)
 533 {
 534   int tem;
 535   register const struct op_print *op_print_tab;
 536
 537   op_print_tab = current_language->la_op_print_tab;
 538   for (tem = 0; op_print_tab[tem].opcode != OP_NULL; tem++)
 539     if (op_print_tab[tem].opcode == op)
 540       return op_print_tab[tem].string;
 541   return NULL;
 542 }
 543
 544 /* Support for dumping the raw data from expressions in a human readable
 545    form.  */
 546
 547 static char *op_name (int opcode);
 548
 549 static char *
 550 op_name (int opcode)
 551 {
 552   switch (opcode)
 553     {
 554     default:
 555       {
 556         static char buf[30];
 557
 558         sprintf (buf, "<unknown %d>", opcode);
 559         return buf;
 560       }
 561     case OP_NULL:
 562       return "OP_NULL";
 563     case BINOP_ADD:
 564       return "BINOP_ADD";
 565     case BINOP_SUB:
 566       return "BINOP_SUB";
 567     case BINOP_MUL:
 568       return "BINOP_MUL";
 569     case BINOP_DIV:
 570       return "BINOP_DIV";
 571     case BINOP_REM:
 572       return "BINOP_REM";
 573     case BINOP_MOD:
 574       return "BINOP_MOD";
 575     case BINOP_LSH:
 576       return "BINOP_LSH";
 577     case BINOP_RSH:
 578       return "BINOP_RSH";
 579     case BINOP_LOGICAL_AND:
 580       return "BINOP_LOGICAL_AND";
 581     case BINOP_LOGICAL_OR:
 582       return "BINOP_LOGICAL_OR";
 583     case BINOP_BITWISE_AND:
 584       return "BINOP_BITWISE_AND";
 585     case BINOP_BITWISE_IOR:
 586       return "BINOP_BITWISE_IOR";
 587     case BINOP_BITWISE_XOR:
 588       return "BINOP_BITWISE_XOR";
 589     case BINOP_EQUAL:
 590       return "BINOP_EQUAL";
 591     case BINOP_NOTEQUAL:
 592       return "BINOP_NOTEQUAL";
 593     case BINOP_LESS:
 594       return "BINOP_LESS";
 595     case BINOP_GTR:
 596       return "BINOP_GTR";
 597     case BINOP_LEQ:
 598       return "BINOP_LEQ";
 599     case BINOP_GEQ:
 600       return "BINOP_GEQ";
 601     case BINOP_REPEAT:
 602       return "BINOP_REPEAT";
 603     case BINOP_ASSIGN:
 604       return "BINOP_ASSIGN";
 605     case BINOP_COMMA:
 606       return "BINOP_COMMA";
 607     case BINOP_SUBSCRIPT:
 608       return "BINOP_SUBSCRIPT";
 609     case MULTI_SUBSCRIPT:
 610       return "MULTI_SUBSCRIPT";
 611     case BINOP_EXP:
 612       return "BINOP_EXP";
 613     case BINOP_MIN:
 614       return "BINOP_MIN";
 615     case BINOP_MAX:
 616       return "BINOP_MAX";
 617     case STRUCTOP_MEMBER:
 618       return "STRUCTOP_MEMBER";
 619     case STRUCTOP_MPTR:
 620       return "STRUCTOP_MPTR";
 621     case BINOP_INTDIV:
 622       return "BINOP_INTDIV";
 623     case BINOP_ASSIGN_MODIFY:
 624       return "BINOP_ASSIGN_MODIFY";
 625     case BINOP_VAL:
 626       return "BINOP_VAL";
 627     case BINOP_INCL:
 628       return "BINOP_INCL";
 629     case BINOP_EXCL:
 630       return "BINOP_EXCL";
 631     case BINOP_CONCAT:
 632       return "BINOP_CONCAT";
 633     case BINOP_RANGE:
 634       return "BINOP_RANGE";
 635     case BINOP_END:
 636       return "BINOP_END";
 637     case TERNOP_COND:
 638       return "TERNOP_COND";
 639     case TERNOP_SLICE:
 640       return "TERNOP_SLICE";
 641     case TERNOP_SLICE_COUNT:
 642       return "TERNOP_SLICE_COUNT";
 643     case OP_LONG:
 644       return "OP_LONG";
 645     case OP_DOUBLE:
 646       return "OP_DOUBLE";
 647     case OP_VAR_VALUE:
 648       return "OP_VAR_VALUE";
 649     case OP_LAST:
 650       return "OP_LAST";
 651     case OP_REGISTER:
 652       return "OP_REGISTER";
 653     case OP_INTERNALVAR:
 654       return "OP_INTERNALVAR";
 655     case OP_FUNCALL:
 656       return "OP_FUNCALL";
 657     case OP_STRING:
 658       return "OP_STRING";
 659     case OP_BITSTRING:
 660       return "OP_BITSTRING";
 661     case OP_ARRAY:
 662       return "OP_ARRAY";
 663     case UNOP_CAST:
 664       return "UNOP_CAST";
 665     case UNOP_MEMVAL:
 666       return "UNOP_MEMVAL";
 667     case UNOP_NEG:
 668       return "UNOP_NEG";
 669     case UNOP_LOGICAL_NOT:
 670       return "UNOP_LOGICAL_NOT";
 671     case UNOP_COMPLEMENT:
 672       return "UNOP_COMPLEMENT";
 673     case UNOP_IND:
 674       return "UNOP_IND";
 675     case UNOP_ADDR:
 676       return "UNOP_ADDR";
 677     case UNOP_PREINCREMENT:
 678       return "UNOP_PREINCREMENT";
 679     case UNOP_POSTINCREMENT:
 680       return "UNOP_POSTINCREMENT";
 681     case UNOP_PREDECREMENT:
 682       return "UNOP_PREDECREMENT";
 683     case UNOP_POSTDECREMENT:
 684       return "UNOP_POSTDECREMENT";
 685     case UNOP_SIZEOF:
 686       return "UNOP_SIZEOF";
 687     case UNOP_LOWER:
 688       return "UNOP_LOWER";
 689     case UNOP_UPPER:
 690       return "UNOP_UPPER";
 691     case UNOP_LENGTH:
 692       return "UNOP_LENGTH";
 693     case UNOP_PLUS:
 694       return "UNOP_PLUS";
 695     case UNOP_CAP:
 696       return "UNOP_CAP";
 697     case UNOP_CHR:
 698       return "UNOP_CHR";
 699     case UNOP_ORD:
 700       return "UNOP_ORD";
 701     case UNOP_ABS:
 702       return "UNOP_ABS";
 703     case UNOP_FLOAT:
 704       return "UNOP_FLOAT";
 705     case UNOP_HIGH:
 706       return "UNOP_HIGH";
 707     case UNOP_MAX:
 708       return "UNOP_MAX";
 709     case UNOP_MIN:
 710       return "UNOP_MIN";
 711     case UNOP_ODD:
 712       return "UNOP_ODD";
 713     case UNOP_TRUNC:
 714       return "UNOP_TRUNC";
 715     case OP_BOOL:
 716       return "OP_BOOL";
 717     case OP_M2_STRING:
 718       return "OP_M2_STRING";
 719     case STRUCTOP_STRUCT:
 720       return "STRUCTOP_STRUCT";
 721     case STRUCTOP_PTR:
 722       return "STRUCTOP_PTR";
 723     case OP_THIS:
 724       return "OP_THIS";
 725     case OP_OBJC_SELF:
 726       return "OP_OBJC_SELF";
 727     case OP_SCOPE:
 728       return "OP_SCOPE";
 729     case OP_TYPE:
 730       return "OP_TYPE";
 731     case OP_LABELED:
 732       return "OP_LABELED";
 733     }
 734 }
 735
 736 void
 737 dump_prefix_expression (struct expression *exp, struct ui_file *stream,
 738                         char *note)
 739 {
 740   int elt;
 741   char *opcode_name;
 742   char *eltscan;
 743   int eltsize;
 744
 745   fprintf_filtered (stream, "Dump of expression @ ");
 746   gdb_print_host_address (exp, stream);
 747   fprintf_filtered (stream, ", %s:\nExpression: `", note);
 748   if (exp->elts[0].opcode != OP_TYPE)
 749     print_expression (exp, stream);
 750   else
 751     fprintf_filtered (stream, "Type printing not yet supported....");
 752   fprintf_filtered (stream, "'\n\tLanguage %s, %d elements, %ld bytes each.\n",
 753                     exp->language_defn->la_name, exp->nelts,
 754                     (long) sizeof (union exp_element));
 755   fprintf_filtered (stream, "\t%5s  %20s  %16s  %s\n", "Index", "Opcode",
 756                     "Hex Value", "String Value");
 757   for (elt = 0; elt < exp->nelts; elt++)
 758     {
 759       fprintf_filtered (stream, "\t%5d  ", elt);
 760       opcode_name = op_name (exp->elts[elt].opcode);
 761
 762       fprintf_filtered (stream, "%20s  ", opcode_name);
 763       print_longest (stream, 'd', 0, exp->elts[elt].longconst);
 764       fprintf_filtered (stream, "  ");
 765
 766       for (eltscan = (char *) &exp->elts[elt],
 767            eltsize = sizeof (union exp_element);
 768            eltsize-- > 0;
 769            eltscan++)
 770         {
 771           fprintf_filtered (stream, "%c",
 772                             isprint (*eltscan) ? (*eltscan & 0xFF) : '.');
 773         }
 774       fprintf_filtered (stream, "\n");
 775     }
 776 }
 777
 778 static int dump_subexp (struct expression *exp, struct ui_file *stream,
 779                         int elt);
 780
 781 static int
 782 dump_subexp (struct expression *exp, struct ui_file *stream, int elt)
 783 {
 784   static int indent = 0;
 785   int i;
 786
 787   fprintf_filtered (stream, "\n");
 788   fprintf_filtered (stream, "\t%5d  ", elt);
 789
 790   for (i = 1; i <= indent; i++)
 791     fprintf_filtered (stream, " ");
 792   indent += 2;
 793
 794   fprintf_filtered (stream, "%-20s  ", op_name (exp->elts[elt].opcode));
 795
 796   switch (exp->elts[elt++].opcode)
 797     {
 798     case TERNOP_COND:
 799     case TERNOP_SLICE:
 800     case TERNOP_SLICE_COUNT:
 801       elt = dump_subexp (exp, stream, elt);
 802     case BINOP_ADD:
 803     case BINOP_SUB:
 804     case BINOP_MUL:
 805     case BINOP_DIV:
 806     case BINOP_REM:
 807     case BINOP_MOD:
 808     case BINOP_LSH:
 809     case BINOP_RSH:
 810     case BINOP_LOGICAL_AND:
 811     case BINOP_LOGICAL_OR:
 812     case BINOP_BITWISE_AND:
 813     case BINOP_BITWISE_IOR:
 814     case BINOP_BITWISE_XOR:
 815     case BINOP_EQUAL:
 816     case BINOP_NOTEQUAL:
 817     case BINOP_LESS:
 818     case BINOP_GTR:
 819     case BINOP_LEQ:
 820     case BINOP_GEQ:
 821     case BINOP_REPEAT:
 822     case BINOP_ASSIGN:
 823     case BINOP_COMMA:
 824     case BINOP_SUBSCRIPT:
 825     case BINOP_EXP:
 826     case BINOP_MIN:
 827     case BINOP_MAX:
 828     case BINOP_INTDIV:
 829     case BINOP_ASSIGN_MODIFY:
 830     case BINOP_VAL:
 831     case BINOP_INCL:
 832     case BINOP_EXCL:
 833     case BINOP_CONCAT:
 834     case BINOP_IN:
 835     case BINOP_RANGE:
 836     case BINOP_END:
 837       elt = dump_subexp (exp, stream, elt);
 838     case UNOP_NEG:
 839     case UNOP_LOGICAL_NOT:
 840     case UNOP_COMPLEMENT:
 841     case UNOP_IND:
 842     case UNOP_ADDR:
 843     case UNOP_PREINCREMENT:
 844     case UNOP_POSTINCREMENT:
 845     case UNOP_PREDECREMENT:
 846     case UNOP_POSTDECREMENT:
 847     case UNOP_SIZEOF:
 848     case UNOP_PLUS:
 849     case UNOP_CAP:
 850     case UNOP_CHR:
 851     case UNOP_ORD:
 852     case UNOP_ABS:
 853     case UNOP_FLOAT:
 854     case UNOP_HIGH:
 855     case UNOP_MAX:
 856     case UNOP_MIN:
 857     case UNOP_ODD:
 858     case UNOP_TRUNC:
 859     case UNOP_LOWER:
 860     case UNOP_UPPER:
 861     case UNOP_LENGTH:
 862     case UNOP_CARD:
 863     case UNOP_CHMAX:
 864     case UNOP_CHMIN:
 865       elt = dump_subexp (exp, stream, elt);
 866       break;
 867     case OP_LONG:
 868       fprintf_filtered (stream, "Type @");
 869       gdb_print_host_address (exp->elts[elt].type, stream);
 870       fprintf_filtered (stream, " (");
 871       type_print (exp->elts[elt].type, NULL, stream, 0);
 872       fprintf_filtered (stream, "), value %ld (0x%lx)",
 873                         (long) exp->elts[elt + 1].longconst,
 874                         (long) exp->elts[elt + 1].longconst);
 875       elt += 3;
 876       break;
 877     case OP_DOUBLE:
 878       fprintf_filtered (stream, "Type @");
 879       gdb_print_host_address (exp->elts[elt].type, stream);
 880       fprintf_filtered (stream, " (");
 881       type_print (exp->elts[elt].type, NULL, stream, 0);
 882       fprintf_filtered (stream, "), value %g",
 883                         (double) exp->elts[elt + 1].doubleconst);
 884       elt += 3;
 885       break;
 886     case OP_VAR_VALUE:
 887       fprintf_filtered (stream, "Block @");
 888       gdb_print_host_address (exp->elts[elt].block, stream);
 889       fprintf_filtered (stream, ", symbol @");
 890       gdb_print_host_address (exp->elts[elt + 1].symbol, stream);
 891       fprintf_filtered (stream, " (%s)",
 892                         SYMBOL_NAME (exp->elts[elt + 1].symbol));
 893       elt += 3;
 894       break;
 895     case OP_LAST:
 896       fprintf_filtered (stream, "History element %ld",
 897                         (long) exp->elts[elt].longconst);
 898       elt += 2;
 899       break;
 900     case OP_REGISTER:
 901       fprintf_filtered (stream, "Register %ld",
 902                         (long) exp->elts[elt].longconst);
 903       elt += 2;
 904       break;
 905     case OP_INTERNALVAR:
 906       fprintf_filtered (stream, "Internal var @");
 907       gdb_print_host_address (exp->elts[elt].internalvar, stream);
 908       fprintf_filtered (stream, " (%s)",
 909                         exp->elts[elt].internalvar->name);
 910       elt += 2;
 911       break;
 912     case OP_FUNCALL:
 913       {
 914         int nargs;
 915
 916         nargs = longest_to_int (exp->elts[elt].longconst);
 917
 918         fprintf_filtered (stream, "Number of args: %d", nargs);
 919         elt += 2;
 920
 921         for (i = 1; i <= nargs + 1; i++)
 922           elt = dump_subexp (exp, stream, elt);
 923       }
 924       break;
 925     case OP_ARRAY:
 926       {
 927         int lower, upper;
 928         int i;
 929
 930         lower = longest_to_int (exp->elts[elt].longconst);
 931         upper = longest_to_int (exp->elts[elt + 1].longconst);
 932
 933         fprintf_filtered (stream, "Bounds [%d:%d]", lower, upper);
 934         elt += 3;
 935
 936         for (i = 1; i <= upper - lower + 1; i++)
 937           elt = dump_subexp (exp, stream, elt);
 938       }
 939       break;
 940     case UNOP_MEMVAL:
 941     case UNOP_CAST:
 942       fprintf_filtered (stream, "Type @");
 943       gdb_print_host_address (exp->elts[elt].type, stream);
 944       fprintf_filtered (stream, " (");
 945       type_print (exp->elts[elt].type, NULL, stream, 0);
 946       fprintf_filtered (stream, ")");
 947       elt = dump_subexp (exp, stream, elt + 2);
 948       break;
 949     case OP_TYPE:
 950       fprintf_filtered (stream, "Type @");
 951       gdb_print_host_address (exp->elts[elt].type, stream);
 952       fprintf_filtered (stream, " (");
 953       type_print (exp->elts[elt].type, NULL, stream, 0);
 954       fprintf_filtered (stream, ")");
 955       elt += 2;
 956       break;
 957     case STRUCTOP_STRUCT:
 958     case STRUCTOP_PTR:
 959       {
 960         char *elem_name;
 961         int len;
 962
 963         len = longest_to_int (exp->elts[elt].longconst);
 964         elem_name = &exp->elts[elt + 1].string;
 965
 966         fprintf_filtered (stream, "Element name: `%.*s'", len, elem_name);
 967         elt = dump_subexp (exp, stream, elt + 3 + BYTES_TO_EXP_ELEM (len + 1));
 968       }
 969       break;
 970     case OP_SCOPE:
 971       {
 972         char *elem_name;
 973         int len;
 974
 975         fprintf_filtered (stream, "Type @");
 976         gdb_print_host_address (exp->elts[elt].type, stream);
 977         fprintf_filtered (stream, " (");
 978         type_print (exp->elts[elt].type, NULL, stream, 0);
 979         fprintf_filtered (stream, ") ");
 980
 981         len = longest_to_int (exp->elts[elt + 1].longconst);
 982         elem_name = &exp->elts[elt + 2].string;
 983
 984         fprintf_filtered (stream, "Field name: `%.*s'", len, elem_name);
 985         elt += 4 + BYTES_TO_EXP_ELEM (len + 1);
 986       }
 987       break;
 988     default:
 989     case OP_NULL:
 990     case STRUCTOP_MEMBER:
 991     case STRUCTOP_MPTR:
 992     case MULTI_SUBSCRIPT:
 993     case OP_F77_UNDETERMINED_ARGLIST:
 994     case OP_COMPLEX:
 995     case OP_STRING:
 996     case OP_BITSTRING:
 997     case OP_BOOL:
 998     case OP_M2_STRING:
 999     case OP_THIS:
1000     case OP_LABELED:
1001     case OP_NAME:
1002     case OP_EXPRSTRING:
1003       fprintf_filtered (stream, "Unknown format");
1004     }
1005
1006   indent -= 2;
1007
1008   return elt;
1009 }
1010
1011 void
1012 dump_postfix_expression (struct expression *exp, struct ui_file *stream,
1013                          char *note)
1014 {
1015   int elt;
1016
1017   fprintf_filtered (stream, "Dump of expression @ ");
1018   gdb_print_host_address (exp, stream);
1019   fprintf_filtered (stream, ", %s:\nExpression: `", note);
1020   if (exp->elts[0].opcode != OP_TYPE)
1021     print_expression (exp, stream);
1022   else
1023     fputs_filtered ("Type printing not yet supported....", stream);
1024   fprintf_filtered (stream, "'\n\tLanguage %s, %d elements, %ld bytes each.\n",
1025                     exp->language_defn->la_name, exp->nelts,
1026                     (long) sizeof (union exp_element));
1027   fputs_filtered ("\n", stream);
1028
1029   for (elt = 0; elt < exp->nelts;)
1030     elt = dump_subexp (exp, stream, elt);
1031   fputs_filtered ("\n", stream);
1032 }