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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-7.1/] [gdb/] [expprint.c] - Blame information for rev 227

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1 227 jeremybenn
/* 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, 2009, 2010
5
   Free Software Foundation, Inc.
6
 
7
   This file is part of GDB.
8
 
9
   This program is free software; you can redistribute it and/or modify
10
   it under the terms of the GNU General Public License as published by
11
   the Free Software Foundation; either version 3 of the License, or
12
   (at your option) any later version.
13
 
14
   This program is distributed in the hope that it will be useful,
15
   but WITHOUT ANY WARRANTY; without even the implied warranty of
16
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17
   GNU General Public License for more details.
18
 
19
   You should have received a copy of the GNU General Public License
20
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
21
 
22
#include "defs.h"
23
#include "symtab.h"
24
#include "gdbtypes.h"
25
#include "expression.h"
26
#include "value.h"
27
#include "language.h"
28
#include "parser-defs.h"
29
#include "user-regs.h"          /* For user_reg_map_regnum_to_name.  */
30
#include "target.h"
31
#include "gdb_string.h"
32
#include "block.h"
33
#include "objfiles.h"
34
#include "gdb_assert.h"
35
#include "valprint.h"
36
 
37
#ifdef HAVE_CTYPE_H
38
#include <ctype.h>
39
#endif
40
 
41
void
42
print_expression (struct expression *exp, struct ui_file *stream)
43
{
44
  int pc = 0;
45
  print_subexp (exp, &pc, stream, PREC_NULL);
46
}
47
 
48
/* Print the subexpression of EXP that starts in position POS, on STREAM.
49
   PREC is the precedence of the surrounding operator;
50
   if the precedence of the main operator of this subexpression is less,
51
   parentheses are needed here.  */
52
 
53
void
54
print_subexp (struct expression *exp, int *pos,
55
              struct ui_file *stream, enum precedence prec)
56
{
57
  exp->language_defn->la_exp_desc->print_subexp (exp, pos, stream, prec);
58
}
59
 
60
/* Standard implementation of print_subexp for use in language_defn
61
   vectors.  */
62
void
63
print_subexp_standard (struct expression *exp, int *pos,
64
                       struct ui_file *stream, enum precedence prec)
65
{
66
  unsigned tem;
67
  const struct op_print *op_print_tab;
68
  int pc;
69
  unsigned nargs;
70
  char *op_str;
71
  int assign_modify = 0;
72
  enum exp_opcode opcode;
73
  enum precedence myprec = PREC_NULL;
74
  /* Set to 1 for a right-associative operator.  */
75
  int assoc = 0;
76
  struct value *val;
77
  char *tempstr = NULL;
78
 
79
  op_print_tab = exp->language_defn->la_op_print_tab;
80
  pc = (*pos)++;
81
  opcode = exp->elts[pc].opcode;
82
  switch (opcode)
83
    {
84
      /* Common ops */
85
 
86
    case OP_SCOPE:
87
      myprec = PREC_PREFIX;
88
      assoc = 0;
89
      fputs_filtered (type_name_no_tag (exp->elts[pc + 1].type), stream);
90
      fputs_filtered ("::", stream);
91
      nargs = longest_to_int (exp->elts[pc + 2].longconst);
92
      (*pos) += 4 + BYTES_TO_EXP_ELEM (nargs + 1);
93
      fputs_filtered (&exp->elts[pc + 3].string, stream);
94
      return;
95
 
96
    case OP_LONG:
97
      {
98
        struct value_print_options opts;
99
        get_raw_print_options (&opts);
100
        (*pos) += 3;
101
        value_print (value_from_longest (exp->elts[pc + 1].type,
102
                                         exp->elts[pc + 2].longconst),
103
                     stream, &opts);
104
      }
105
      return;
106
 
107
    case OP_DOUBLE:
108
      {
109
        struct value_print_options opts;
110
        get_raw_print_options (&opts);
111
        (*pos) += 3;
112
        value_print (value_from_double (exp->elts[pc + 1].type,
113
                                        exp->elts[pc + 2].doubleconst),
114
                     stream, &opts);
115
      }
116
      return;
117
 
118
    case OP_VAR_VALUE:
119
      {
120
        struct block *b;
121
        (*pos) += 3;
122
        b = exp->elts[pc + 1].block;
123
        if (b != NULL
124
            && BLOCK_FUNCTION (b) != NULL
125
            && SYMBOL_PRINT_NAME (BLOCK_FUNCTION (b)) != NULL)
126
          {
127
            fputs_filtered (SYMBOL_PRINT_NAME (BLOCK_FUNCTION (b)), stream);
128
            fputs_filtered ("::", stream);
129
          }
130
        fputs_filtered (SYMBOL_PRINT_NAME (exp->elts[pc + 2].symbol), stream);
131
      }
132
      return;
133
 
134
    case OP_LAST:
135
      (*pos) += 2;
136
      fprintf_filtered (stream, "$%d",
137
                        longest_to_int (exp->elts[pc + 1].longconst));
138
      return;
139
 
140
    case OP_REGISTER:
141
      {
142
        const char *name = &exp->elts[pc + 2].string;
143
        (*pos) += 3 + BYTES_TO_EXP_ELEM (exp->elts[pc + 1].longconst + 1);
144
        fprintf_filtered (stream, "$%s", name);
145
        return;
146
      }
147
 
148
    case OP_BOOL:
149
      (*pos) += 2;
150
      fprintf_filtered (stream, "%s",
151
                        longest_to_int (exp->elts[pc + 1].longconst)
152
                        ? "TRUE" : "FALSE");
153
      return;
154
 
155
    case OP_INTERNALVAR:
156
      (*pos) += 2;
157
      fprintf_filtered (stream, "$%s",
158
                        internalvar_name (exp->elts[pc + 1].internalvar));
159
      return;
160
 
161
    case OP_FUNCALL:
162
      (*pos) += 2;
163
      nargs = longest_to_int (exp->elts[pc + 1].longconst);
164
      print_subexp (exp, pos, stream, PREC_SUFFIX);
165
      fputs_filtered (" (", stream);
166
      for (tem = 0; tem < nargs; tem++)
167
        {
168
          if (tem != 0)
169
            fputs_filtered (", ", stream);
170
          print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
171
        }
172
      fputs_filtered (")", stream);
173
      return;
174
 
175
    case OP_NAME:
176
      nargs = longest_to_int (exp->elts[pc + 1].longconst);
177
      (*pos) += 3 + BYTES_TO_EXP_ELEM (nargs + 1);
178
      fputs_filtered (&exp->elts[pc + 2].string, stream);
179
      return;
180
 
181
    case OP_STRING:
182
      {
183
        struct value_print_options opts;
184
        nargs = longest_to_int (exp->elts[pc + 1].longconst);
185
        (*pos) += 3 + BYTES_TO_EXP_ELEM (nargs + 1);
186
        /* LA_PRINT_STRING will print using the current repeat count threshold.
187
           If necessary, we can temporarily set it to zero, or pass it as an
188
           additional parameter to LA_PRINT_STRING.  -fnf */
189
        get_user_print_options (&opts);
190
        LA_PRINT_STRING (stream, builtin_type (exp->gdbarch)->builtin_char,
191
                         &exp->elts[pc + 2].string, nargs, NULL, 0, &opts);
192
      }
193
      return;
194
 
195
    case OP_BITSTRING:
196
      nargs = longest_to_int (exp->elts[pc + 1].longconst);
197
      (*pos)
198
        += 3 + BYTES_TO_EXP_ELEM ((nargs + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT);
199
      fprintf_unfiltered (stream, "B'<unimplemented>'");
200
      return;
201
 
202
    case OP_OBJC_NSSTRING:      /* Objective-C Foundation Class NSString constant.  */
203
      {
204
        struct value_print_options opts;
205
        nargs = longest_to_int (exp->elts[pc + 1].longconst);
206
        (*pos) += 3 + BYTES_TO_EXP_ELEM (nargs + 1);
207
        fputs_filtered ("@\"", stream);
208
        get_user_print_options (&opts);
209
        LA_PRINT_STRING (stream, builtin_type (exp->gdbarch)->builtin_char,
210
                         &exp->elts[pc + 2].string, nargs, NULL, 0, &opts);
211
        fputs_filtered ("\"", stream);
212
      }
213
      return;
214
 
215
    case OP_OBJC_MSGCALL:
216
      {                 /* Objective C message (method) call.  */
217
        char *selector;
218
        (*pos) += 3;
219
        nargs = longest_to_int (exp->elts[pc + 2].longconst);
220
        fprintf_unfiltered (stream, "[");
221
        print_subexp (exp, pos, stream, PREC_SUFFIX);
222
        if (0 == target_read_string (exp->elts[pc + 1].longconst,
223
                                     &selector, 1024, NULL))
224
          {
225
            error (_("bad selector"));
226
            return;
227
          }
228
        if (nargs)
229
          {
230
            char *s, *nextS;
231
            s = alloca (strlen (selector) + 1);
232
            strcpy (s, selector);
233
            for (tem = 0; tem < nargs; tem++)
234
              {
235
                nextS = strchr (s, ':');
236
                gdb_assert (nextS);     /* Make sure we found ':'.  */
237
                *nextS = '\0';
238
                fprintf_unfiltered (stream, " %s: ", s);
239
                s = nextS + 1;
240
                print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
241
              }
242
          }
243
        else
244
          {
245
            fprintf_unfiltered (stream, " %s", selector);
246
          }
247
        fprintf_unfiltered (stream, "]");
248
        /* "selector" was malloc'd by target_read_string. Free it.  */
249
        xfree (selector);
250
        return;
251
      }
252
 
253
    case OP_ARRAY:
254
      (*pos) += 3;
255
      nargs = longest_to_int (exp->elts[pc + 2].longconst);
256
      nargs -= longest_to_int (exp->elts[pc + 1].longconst);
257
      nargs++;
258
      tem = 0;
259
      if (exp->elts[pc + 4].opcode == OP_LONG
260
          && exp->elts[pc + 5].type
261
             == builtin_type (exp->gdbarch)->builtin_char
262
          && exp->language_defn->la_language == language_c)
263
        {
264
          /* Attempt to print C character arrays using string syntax.
265
             Walk through the args, picking up one character from each
266
             of the OP_LONG expression elements.  If any array element
267
             does not match our expection of what we should find for
268
             a simple string, revert back to array printing.  Note that
269
             the last expression element is an explicit null terminator
270
             byte, which doesn't get printed. */
271
          tempstr = alloca (nargs);
272
          pc += 4;
273
          while (tem < nargs)
274
            {
275
              if (exp->elts[pc].opcode != OP_LONG
276
                  || exp->elts[pc + 1].type
277
                     != builtin_type (exp->gdbarch)->builtin_char)
278
                {
279
                  /* Not a simple array of char, use regular array printing. */
280
                  tem = 0;
281
                  break;
282
                }
283
              else
284
                {
285
                  tempstr[tem++] =
286
                    longest_to_int (exp->elts[pc + 2].longconst);
287
                  pc += 4;
288
                }
289
            }
290
        }
291
      if (tem > 0)
292
        {
293
          struct value_print_options opts;
294
          get_user_print_options (&opts);
295
          LA_PRINT_STRING (stream, builtin_type (exp->gdbarch)->builtin_char,
296
                           tempstr, nargs - 1, NULL, 0, &opts);
297
          (*pos) = pc;
298
        }
299
      else
300
        {
301
          fputs_filtered (" {", stream);
302
          for (tem = 0; tem < nargs; tem++)
303
            {
304
              if (tem != 0)
305
                {
306
                  fputs_filtered (", ", stream);
307
                }
308
              print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
309
            }
310
          fputs_filtered ("}", stream);
311
        }
312
      return;
313
 
314
    case OP_LABELED:
315
      tem = longest_to_int (exp->elts[pc + 1].longconst);
316
      (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
317
      /* Gcc support both these syntaxes.  Unsure which is preferred.  */
318
#if 1
319
      fputs_filtered (&exp->elts[pc + 2].string, stream);
320
      fputs_filtered (": ", stream);
321
#else
322
      fputs_filtered (".", stream);
323
      fputs_filtered (&exp->elts[pc + 2].string, stream);
324
      fputs_filtered ("=", stream);
325
#endif
326
      print_subexp (exp, pos, stream, PREC_SUFFIX);
327
      return;
328
 
329
    case TERNOP_COND:
330
      if ((int) prec > (int) PREC_COMMA)
331
        fputs_filtered ("(", stream);
332
      /* Print the subexpressions, forcing parentheses
333
         around any binary operations within them.
334
         This is more parentheses than are strictly necessary,
335
         but it looks clearer.  */
336
      print_subexp (exp, pos, stream, PREC_HYPER);
337
      fputs_filtered (" ? ", stream);
338
      print_subexp (exp, pos, stream, PREC_HYPER);
339
      fputs_filtered (" : ", stream);
340
      print_subexp (exp, pos, stream, PREC_HYPER);
341
      if ((int) prec > (int) PREC_COMMA)
342
        fputs_filtered (")", stream);
343
      return;
344
 
345
    case TERNOP_SLICE:
346
    case TERNOP_SLICE_COUNT:
347
      print_subexp (exp, pos, stream, PREC_SUFFIX);
348
      fputs_filtered ("(", stream);
349
      print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
350
      fputs_filtered (opcode == TERNOP_SLICE ? " : " : " UP ", stream);
351
      print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
352
      fputs_filtered (")", stream);
353
      return;
354
 
355
    case STRUCTOP_STRUCT:
356
      tem = longest_to_int (exp->elts[pc + 1].longconst);
357
      (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
358
      print_subexp (exp, pos, stream, PREC_SUFFIX);
359
      fputs_filtered (".", stream);
360
      fputs_filtered (&exp->elts[pc + 2].string, stream);
361
      return;
362
 
363
      /* Will not occur for Modula-2 */
364
    case STRUCTOP_PTR:
365
      tem = longest_to_int (exp->elts[pc + 1].longconst);
366
      (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
367
      print_subexp (exp, pos, stream, PREC_SUFFIX);
368
      fputs_filtered ("->", stream);
369
      fputs_filtered (&exp->elts[pc + 2].string, stream);
370
      return;
371
 
372
    case STRUCTOP_MEMBER:
373
      print_subexp (exp, pos, stream, PREC_SUFFIX);
374
      fputs_filtered (".*", stream);
375
      print_subexp (exp, pos, stream, PREC_SUFFIX);
376
      return;
377
 
378
    case STRUCTOP_MPTR:
379
      print_subexp (exp, pos, stream, PREC_SUFFIX);
380
      fputs_filtered ("->*", stream);
381
      print_subexp (exp, pos, stream, PREC_SUFFIX);
382
      return;
383
 
384
    case BINOP_SUBSCRIPT:
385
      print_subexp (exp, pos, stream, PREC_SUFFIX);
386
      fputs_filtered ("[", stream);
387
      print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
388
      fputs_filtered ("]", stream);
389
      return;
390
 
391
    case UNOP_POSTINCREMENT:
392
      print_subexp (exp, pos, stream, PREC_SUFFIX);
393
      fputs_filtered ("++", stream);
394
      return;
395
 
396
    case UNOP_POSTDECREMENT:
397
      print_subexp (exp, pos, stream, PREC_SUFFIX);
398
      fputs_filtered ("--", stream);
399
      return;
400
 
401
    case UNOP_CAST:
402
      (*pos) += 2;
403
      if ((int) prec > (int) PREC_PREFIX)
404
        fputs_filtered ("(", stream);
405
      fputs_filtered ("(", stream);
406
      type_print (exp->elts[pc + 1].type, "", stream, 0);
407
      fputs_filtered (") ", stream);
408
      print_subexp (exp, pos, stream, PREC_PREFIX);
409
      if ((int) prec > (int) PREC_PREFIX)
410
        fputs_filtered (")", stream);
411
      return;
412
 
413
    case UNOP_DYNAMIC_CAST:
414
    case UNOP_REINTERPRET_CAST:
415
      fputs_filtered (opcode == UNOP_DYNAMIC_CAST ? "dynamic_cast"
416
                      : "reinterpret_cast", stream);
417
      fputs_filtered ("<", stream);
418
      (*pos) += 2;
419
      type_print (exp->elts[pc + 1].type, "", stream, 0);
420
      fputs_filtered ("> (", stream);
421
      print_subexp (exp, pos, stream, PREC_PREFIX);
422
      fputs_filtered (")", stream);
423
      return;
424
 
425
    case UNOP_MEMVAL:
426
      (*pos) += 2;
427
      if ((int) prec > (int) PREC_PREFIX)
428
        fputs_filtered ("(", stream);
429
      if (TYPE_CODE (exp->elts[pc + 1].type) == TYPE_CODE_FUNC
430
          && exp->elts[pc + 3].opcode == OP_LONG)
431
        {
432
          struct value_print_options opts;
433
 
434
          /* We have a minimal symbol fn, probably.  It's encoded
435
             as a UNOP_MEMVAL (function-type) of an OP_LONG (int, address).
436
             Swallow the OP_LONG (including both its opcodes); ignore
437
             its type; print the value in the type of the MEMVAL.  */
438
          (*pos) += 4;
439
          val = value_at_lazy (exp->elts[pc + 1].type,
440
                               (CORE_ADDR) exp->elts[pc + 5].longconst);
441
          get_raw_print_options (&opts);
442
          value_print (val, stream, &opts);
443
        }
444
      else
445
        {
446
          fputs_filtered ("{", stream);
447
          type_print (exp->elts[pc + 1].type, "", stream, 0);
448
          fputs_filtered ("} ", stream);
449
          print_subexp (exp, pos, stream, PREC_PREFIX);
450
        }
451
      if ((int) prec > (int) PREC_PREFIX)
452
        fputs_filtered (")", stream);
453
      return;
454
 
455
    case UNOP_MEMVAL_TLS:
456
      (*pos) += 3;
457
      if ((int) prec > (int) PREC_PREFIX)
458
        fputs_filtered ("(", stream);
459
      fputs_filtered ("{", stream);
460
      type_print (exp->elts[pc + 2].type, "", stream, 0);
461
      fputs_filtered ("} ", stream);
462
      print_subexp (exp, pos, stream, PREC_PREFIX);
463
      if ((int) prec > (int) PREC_PREFIX)
464
        fputs_filtered (")", stream);
465
      return;
466
 
467
    case BINOP_ASSIGN_MODIFY:
468
      opcode = exp->elts[pc + 1].opcode;
469
      (*pos) += 2;
470
      myprec = PREC_ASSIGN;
471
      assoc = 1;
472
      assign_modify = 1;
473
      op_str = "???";
474
      for (tem = 0; op_print_tab[tem].opcode != OP_NULL; tem++)
475
        if (op_print_tab[tem].opcode == opcode)
476
          {
477
            op_str = op_print_tab[tem].string;
478
            break;
479
          }
480
      if (op_print_tab[tem].opcode != opcode)
481
        /* Not found; don't try to keep going because we don't know how
482
           to interpret further elements.  */
483
        error (_("Invalid expression"));
484
      break;
485
 
486
      /* C++ ops */
487
 
488
    case OP_THIS:
489
      ++(*pos);
490
      fputs_filtered ("this", stream);
491
      return;
492
 
493
      /* Objective-C ops */
494
 
495
    case OP_OBJC_SELF:
496
      ++(*pos);
497
      fputs_filtered ("self", stream);  /* The ObjC equivalent of "this".  */
498
      return;
499
 
500
      /* Modula-2 ops */
501
 
502
    case MULTI_SUBSCRIPT:
503
      (*pos) += 2;
504
      nargs = longest_to_int (exp->elts[pc + 1].longconst);
505
      print_subexp (exp, pos, stream, PREC_SUFFIX);
506
      fprintf_unfiltered (stream, " [");
507
      for (tem = 0; tem < nargs; tem++)
508
        {
509
          if (tem != 0)
510
            fprintf_unfiltered (stream, ", ");
511
          print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
512
        }
513
      fprintf_unfiltered (stream, "]");
514
      return;
515
 
516
    case BINOP_VAL:
517
      (*pos) += 2;
518
      fprintf_unfiltered (stream, "VAL(");
519
      type_print (exp->elts[pc + 1].type, "", stream, 0);
520
      fprintf_unfiltered (stream, ",");
521
      print_subexp (exp, pos, stream, PREC_PREFIX);
522
      fprintf_unfiltered (stream, ")");
523
      return;
524
 
525
    case BINOP_INCL:
526
    case BINOP_EXCL:
527
      error (_("print_subexp:  Not implemented."));
528
 
529
      /* Default ops */
530
 
531
    default:
532
      op_str = "???";
533
      for (tem = 0; op_print_tab[tem].opcode != OP_NULL; tem++)
534
        if (op_print_tab[tem].opcode == opcode)
535
          {
536
            op_str = op_print_tab[tem].string;
537
            myprec = op_print_tab[tem].precedence;
538
            assoc = op_print_tab[tem].right_assoc;
539
            break;
540
          }
541
      if (op_print_tab[tem].opcode != opcode)
542
        /* Not found; don't try to keep going because we don't know how
543
           to interpret further elements.  For example, this happens
544
           if opcode is OP_TYPE.  */
545
        error (_("Invalid expression"));
546
    }
547
 
548
  /* Note that PREC_BUILTIN will always emit parentheses. */
549
  if ((int) myprec < (int) prec)
550
    fputs_filtered ("(", stream);
551
  if ((int) opcode > (int) BINOP_END)
552
    {
553
      if (assoc)
554
        {
555
          /* Unary postfix operator.  */
556
          print_subexp (exp, pos, stream, PREC_SUFFIX);
557
          fputs_filtered (op_str, stream);
558
        }
559
      else
560
        {
561
          /* Unary prefix operator.  */
562
          fputs_filtered (op_str, stream);
563
          if (myprec == PREC_BUILTIN_FUNCTION)
564
            fputs_filtered ("(", stream);
565
          print_subexp (exp, pos, stream, PREC_PREFIX);
566
          if (myprec == PREC_BUILTIN_FUNCTION)
567
            fputs_filtered (")", stream);
568
        }
569
    }
570
  else
571
    {
572
      /* Binary operator.  */
573
      /* Print left operand.
574
         If operator is right-associative,
575
         increment precedence for this operand.  */
576
      print_subexp (exp, pos, stream,
577
                    (enum precedence) ((int) myprec + assoc));
578
      /* Print the operator itself.  */
579
      if (assign_modify)
580
        fprintf_filtered (stream, " %s= ", op_str);
581
      else if (op_str[0] == ',')
582
        fprintf_filtered (stream, "%s ", op_str);
583
      else
584
        fprintf_filtered (stream, " %s ", op_str);
585
      /* Print right operand.
586
         If operator is left-associative,
587
         increment precedence for this operand.  */
588
      print_subexp (exp, pos, stream,
589
                    (enum precedence) ((int) myprec + !assoc));
590
    }
591
 
592
  if ((int) myprec < (int) prec)
593
    fputs_filtered (")", stream);
594
}
595
 
596
/* Return the operator corresponding to opcode OP as
597
   a string.   NULL indicates that the opcode was not found in the
598
   current language table.  */
599
char *
600
op_string (enum exp_opcode op)
601
{
602
  int tem;
603
  const struct op_print *op_print_tab;
604
 
605
  op_print_tab = current_language->la_op_print_tab;
606
  for (tem = 0; op_print_tab[tem].opcode != OP_NULL; tem++)
607
    if (op_print_tab[tem].opcode == op)
608
      return op_print_tab[tem].string;
609
  return NULL;
610
}
611
 
612
/* Support for dumping the raw data from expressions in a human readable
613
   form.  */
614
 
615
static char *op_name (struct expression *, enum exp_opcode);
616
static int dump_subexp_body (struct expression *exp, struct ui_file *, int);
617
 
618
/* Name for OPCODE, when it appears in expression EXP. */
619
 
620
static char *
621
op_name (struct expression *exp, enum exp_opcode opcode)
622
{
623
  return exp->language_defn->la_exp_desc->op_name (opcode);
624
}
625
 
626
/* Default name for the standard operator OPCODE (i.e., one defined in
627
   the definition of enum exp_opcode).  */
628
 
629
char *
630
op_name_standard (enum exp_opcode opcode)
631
{
632
  switch (opcode)
633
    {
634
    default:
635
      {
636
        static char buf[30];
637
 
638
        sprintf (buf, "<unknown %d>", opcode);
639
        return buf;
640
      }
641
    case OP_NULL:
642
      return "OP_NULL";
643
    case BINOP_ADD:
644
      return "BINOP_ADD";
645
    case BINOP_SUB:
646
      return "BINOP_SUB";
647
    case BINOP_MUL:
648
      return "BINOP_MUL";
649
    case BINOP_DIV:
650
      return "BINOP_DIV";
651
    case BINOP_REM:
652
      return "BINOP_REM";
653
    case BINOP_MOD:
654
      return "BINOP_MOD";
655
    case BINOP_LSH:
656
      return "BINOP_LSH";
657
    case BINOP_RSH:
658
      return "BINOP_RSH";
659
    case BINOP_LOGICAL_AND:
660
      return "BINOP_LOGICAL_AND";
661
    case BINOP_LOGICAL_OR:
662
      return "BINOP_LOGICAL_OR";
663
    case BINOP_BITWISE_AND:
664
      return "BINOP_BITWISE_AND";
665
    case BINOP_BITWISE_IOR:
666
      return "BINOP_BITWISE_IOR";
667
    case BINOP_BITWISE_XOR:
668
      return "BINOP_BITWISE_XOR";
669
    case BINOP_EQUAL:
670
      return "BINOP_EQUAL";
671
    case BINOP_NOTEQUAL:
672
      return "BINOP_NOTEQUAL";
673
    case BINOP_LESS:
674
      return "BINOP_LESS";
675
    case BINOP_GTR:
676
      return "BINOP_GTR";
677
    case BINOP_LEQ:
678
      return "BINOP_LEQ";
679
    case BINOP_GEQ:
680
      return "BINOP_GEQ";
681
    case BINOP_REPEAT:
682
      return "BINOP_REPEAT";
683
    case BINOP_ASSIGN:
684
      return "BINOP_ASSIGN";
685
    case BINOP_COMMA:
686
      return "BINOP_COMMA";
687
    case BINOP_SUBSCRIPT:
688
      return "BINOP_SUBSCRIPT";
689
    case MULTI_SUBSCRIPT:
690
      return "MULTI_SUBSCRIPT";
691
    case BINOP_EXP:
692
      return "BINOP_EXP";
693
    case BINOP_MIN:
694
      return "BINOP_MIN";
695
    case BINOP_MAX:
696
      return "BINOP_MAX";
697
    case STRUCTOP_MEMBER:
698
      return "STRUCTOP_MEMBER";
699
    case STRUCTOP_MPTR:
700
      return "STRUCTOP_MPTR";
701
    case BINOP_INTDIV:
702
      return "BINOP_INTDIV";
703
    case BINOP_ASSIGN_MODIFY:
704
      return "BINOP_ASSIGN_MODIFY";
705
    case BINOP_VAL:
706
      return "BINOP_VAL";
707
    case BINOP_INCL:
708
      return "BINOP_INCL";
709
    case BINOP_EXCL:
710
      return "BINOP_EXCL";
711
    case BINOP_CONCAT:
712
      return "BINOP_CONCAT";
713
    case BINOP_RANGE:
714
      return "BINOP_RANGE";
715
    case BINOP_END:
716
      return "BINOP_END";
717
    case TERNOP_COND:
718
      return "TERNOP_COND";
719
    case TERNOP_SLICE:
720
      return "TERNOP_SLICE";
721
    case TERNOP_SLICE_COUNT:
722
      return "TERNOP_SLICE_COUNT";
723
    case OP_LONG:
724
      return "OP_LONG";
725
    case OP_DOUBLE:
726
      return "OP_DOUBLE";
727
    case OP_VAR_VALUE:
728
      return "OP_VAR_VALUE";
729
    case OP_LAST:
730
      return "OP_LAST";
731
    case OP_REGISTER:
732
      return "OP_REGISTER";
733
    case OP_INTERNALVAR:
734
      return "OP_INTERNALVAR";
735
    case OP_FUNCALL:
736
      return "OP_FUNCALL";
737
    case OP_STRING:
738
      return "OP_STRING";
739
    case OP_BITSTRING:
740
      return "OP_BITSTRING";
741
    case OP_ARRAY:
742
      return "OP_ARRAY";
743
    case UNOP_CAST:
744
      return "UNOP_CAST";
745
    case UNOP_DYNAMIC_CAST:
746
      return "UNOP_DYNAMIC_CAST";
747
    case UNOP_REINTERPRET_CAST:
748
      return "UNOP_REINTERPRET_CAST";
749
    case UNOP_MEMVAL:
750
      return "UNOP_MEMVAL";
751
    case UNOP_MEMVAL_TLS:
752
      return "UNOP_MEMVAL_TLS";
753
    case UNOP_NEG:
754
      return "UNOP_NEG";
755
    case UNOP_LOGICAL_NOT:
756
      return "UNOP_LOGICAL_NOT";
757
    case UNOP_COMPLEMENT:
758
      return "UNOP_COMPLEMENT";
759
    case UNOP_IND:
760
      return "UNOP_IND";
761
    case UNOP_ADDR:
762
      return "UNOP_ADDR";
763
    case UNOP_PREINCREMENT:
764
      return "UNOP_PREINCREMENT";
765
    case UNOP_POSTINCREMENT:
766
      return "UNOP_POSTINCREMENT";
767
    case UNOP_PREDECREMENT:
768
      return "UNOP_PREDECREMENT";
769
    case UNOP_POSTDECREMENT:
770
      return "UNOP_POSTDECREMENT";
771
    case UNOP_SIZEOF:
772
      return "UNOP_SIZEOF";
773
    case UNOP_LOWER:
774
      return "UNOP_LOWER";
775
    case UNOP_UPPER:
776
      return "UNOP_UPPER";
777
    case UNOP_LENGTH:
778
      return "UNOP_LENGTH";
779
    case UNOP_PLUS:
780
      return "UNOP_PLUS";
781
    case UNOP_CAP:
782
      return "UNOP_CAP";
783
    case UNOP_CHR:
784
      return "UNOP_CHR";
785
    case UNOP_ORD:
786
      return "UNOP_ORD";
787
    case UNOP_ABS:
788
      return "UNOP_ABS";
789
    case UNOP_FLOAT:
790
      return "UNOP_FLOAT";
791
    case UNOP_HIGH:
792
      return "UNOP_HIGH";
793
    case UNOP_MAX:
794
      return "UNOP_MAX";
795
    case UNOP_MIN:
796
      return "UNOP_MIN";
797
    case UNOP_ODD:
798
      return "UNOP_ODD";
799
    case UNOP_TRUNC:
800
      return "UNOP_TRUNC";
801
    case OP_BOOL:
802
      return "OP_BOOL";
803
    case OP_M2_STRING:
804
      return "OP_M2_STRING";
805
    case STRUCTOP_STRUCT:
806
      return "STRUCTOP_STRUCT";
807
    case STRUCTOP_PTR:
808
      return "STRUCTOP_PTR";
809
    case OP_THIS:
810
      return "OP_THIS";
811
    case OP_OBJC_SELF:
812
      return "OP_OBJC_SELF";
813
    case OP_SCOPE:
814
      return "OP_SCOPE";
815
    case OP_TYPE:
816
      return "OP_TYPE";
817
    case OP_LABELED:
818
      return "OP_LABELED";
819
    }
820
}
821
 
822
/* Print a raw dump of expression EXP to STREAM.
823
   NOTE, if non-NULL, is printed as extra explanatory text.  */
824
 
825
void
826
dump_raw_expression (struct expression *exp, struct ui_file *stream,
827
                     char *note)
828
{
829
  int elt;
830
  char *opcode_name;
831
  char *eltscan;
832
  int eltsize;
833
 
834
  fprintf_filtered (stream, "Dump of expression @ ");
835
  gdb_print_host_address (exp, stream);
836
  if (note)
837
    fprintf_filtered (stream, ", %s:", note);
838
  fprintf_filtered (stream, "\n\tLanguage %s, %d elements, %ld bytes each.\n",
839
                    exp->language_defn->la_name, exp->nelts,
840
                    (long) sizeof (union exp_element));
841
  fprintf_filtered (stream, "\t%5s  %20s  %16s  %s\n", "Index", "Opcode",
842
                    "Hex Value", "String Value");
843
  for (elt = 0; elt < exp->nelts; elt++)
844
    {
845
      fprintf_filtered (stream, "\t%5d  ", elt);
846
      opcode_name = op_name (exp, exp->elts[elt].opcode);
847
 
848
      fprintf_filtered (stream, "%20s  ", opcode_name);
849
      print_longest (stream, 'd', 0, exp->elts[elt].longconst);
850
      fprintf_filtered (stream, "  ");
851
 
852
      for (eltscan = (char *) &exp->elts[elt],
853
           eltsize = sizeof (union exp_element);
854
           eltsize-- > 0;
855
           eltscan++)
856
        {
857
          fprintf_filtered (stream, "%c",
858
                            isprint (*eltscan) ? (*eltscan & 0xFF) : '.');
859
        }
860
      fprintf_filtered (stream, "\n");
861
    }
862
}
863
 
864
/* Dump the subexpression of prefix expression EXP whose operator is at
865
   position ELT onto STREAM.  Returns the position of the next
866
   subexpression in EXP.  */
867
 
868
int
869
dump_subexp (struct expression *exp, struct ui_file *stream, int elt)
870
{
871
  static int indent = 0;
872
  int i;
873
 
874
  fprintf_filtered (stream, "\n");
875
  fprintf_filtered (stream, "\t%5d  ", elt);
876
 
877
  for (i = 1; i <= indent; i++)
878
    fprintf_filtered (stream, " ");
879
  indent += 2;
880
 
881
  fprintf_filtered (stream, "%-20s  ", op_name (exp, exp->elts[elt].opcode));
882
 
883
  elt = dump_subexp_body (exp, stream, elt);
884
 
885
  indent -= 2;
886
 
887
  return elt;
888
}
889
 
890
/* Dump the operands of prefix expression EXP whose opcode is at
891
   position ELT onto STREAM.  Returns the position of the next
892
   subexpression in EXP.  */
893
 
894
static int
895
dump_subexp_body (struct expression *exp, struct ui_file *stream, int elt)
896
{
897
  return exp->language_defn->la_exp_desc->dump_subexp_body (exp, stream, elt);
898
}
899
 
900
/* Default value for subexp_body in exp_descriptor vector.  */
901
 
902
int
903
dump_subexp_body_standard (struct expression *exp,
904
                           struct ui_file *stream, int elt)
905
{
906
  int opcode = exp->elts[elt++].opcode;
907
 
908
  switch (opcode)
909
    {
910
    case TERNOP_COND:
911
    case TERNOP_SLICE:
912
    case TERNOP_SLICE_COUNT:
913
      elt = dump_subexp (exp, stream, elt);
914
    case BINOP_ADD:
915
    case BINOP_SUB:
916
    case BINOP_MUL:
917
    case BINOP_DIV:
918
    case BINOP_REM:
919
    case BINOP_MOD:
920
    case BINOP_LSH:
921
    case BINOP_RSH:
922
    case BINOP_LOGICAL_AND:
923
    case BINOP_LOGICAL_OR:
924
    case BINOP_BITWISE_AND:
925
    case BINOP_BITWISE_IOR:
926
    case BINOP_BITWISE_XOR:
927
    case BINOP_EQUAL:
928
    case BINOP_NOTEQUAL:
929
    case BINOP_LESS:
930
    case BINOP_GTR:
931
    case BINOP_LEQ:
932
    case BINOP_GEQ:
933
    case BINOP_REPEAT:
934
    case BINOP_ASSIGN:
935
    case BINOP_COMMA:
936
    case BINOP_SUBSCRIPT:
937
    case BINOP_EXP:
938
    case BINOP_MIN:
939
    case BINOP_MAX:
940
    case BINOP_INTDIV:
941
    case BINOP_ASSIGN_MODIFY:
942
    case BINOP_VAL:
943
    case BINOP_INCL:
944
    case BINOP_EXCL:
945
    case BINOP_CONCAT:
946
    case BINOP_IN:
947
    case BINOP_RANGE:
948
    case BINOP_END:
949
    case STRUCTOP_MEMBER:
950
    case STRUCTOP_MPTR:
951
      elt = dump_subexp (exp, stream, elt);
952
    case UNOP_NEG:
953
    case UNOP_LOGICAL_NOT:
954
    case UNOP_COMPLEMENT:
955
    case UNOP_IND:
956
    case UNOP_ADDR:
957
    case UNOP_PREINCREMENT:
958
    case UNOP_POSTINCREMENT:
959
    case UNOP_PREDECREMENT:
960
    case UNOP_POSTDECREMENT:
961
    case UNOP_SIZEOF:
962
    case UNOP_PLUS:
963
    case UNOP_CAP:
964
    case UNOP_CHR:
965
    case UNOP_ORD:
966
    case UNOP_ABS:
967
    case UNOP_FLOAT:
968
    case UNOP_HIGH:
969
    case UNOP_MAX:
970
    case UNOP_MIN:
971
    case UNOP_ODD:
972
    case UNOP_TRUNC:
973
    case UNOP_LOWER:
974
    case UNOP_UPPER:
975
    case UNOP_LENGTH:
976
    case UNOP_CARD:
977
    case UNOP_CHMAX:
978
    case UNOP_CHMIN:
979
      elt = dump_subexp (exp, stream, elt);
980
      break;
981
    case OP_LONG:
982
      fprintf_filtered (stream, "Type @");
983
      gdb_print_host_address (exp->elts[elt].type, stream);
984
      fprintf_filtered (stream, " (");
985
      type_print (exp->elts[elt].type, NULL, stream, 0);
986
      fprintf_filtered (stream, "), value %ld (0x%lx)",
987
                        (long) exp->elts[elt + 1].longconst,
988
                        (long) exp->elts[elt + 1].longconst);
989
      elt += 3;
990
      break;
991
    case OP_DOUBLE:
992
      fprintf_filtered (stream, "Type @");
993
      gdb_print_host_address (exp->elts[elt].type, stream);
994
      fprintf_filtered (stream, " (");
995
      type_print (exp->elts[elt].type, NULL, stream, 0);
996
      fprintf_filtered (stream, "), value %g",
997
                        (double) exp->elts[elt + 1].doubleconst);
998
      elt += 3;
999
      break;
1000
    case OP_VAR_VALUE:
1001
      fprintf_filtered (stream, "Block @");
1002
      gdb_print_host_address (exp->elts[elt].block, stream);
1003
      fprintf_filtered (stream, ", symbol @");
1004
      gdb_print_host_address (exp->elts[elt + 1].symbol, stream);
1005
      fprintf_filtered (stream, " (%s)",
1006
                        SYMBOL_PRINT_NAME (exp->elts[elt + 1].symbol));
1007
      elt += 3;
1008
      break;
1009
    case OP_LAST:
1010
      fprintf_filtered (stream, "History element %ld",
1011
                        (long) exp->elts[elt].longconst);
1012
      elt += 2;
1013
      break;
1014
    case OP_REGISTER:
1015
      fprintf_filtered (stream, "Register $%s", &exp->elts[elt + 1].string);
1016
      elt += 3 + BYTES_TO_EXP_ELEM (exp->elts[elt].longconst + 1);
1017
      break;
1018
    case OP_INTERNALVAR:
1019
      fprintf_filtered (stream, "Internal var @");
1020
      gdb_print_host_address (exp->elts[elt].internalvar, stream);
1021
      fprintf_filtered (stream, " (%s)",
1022
                        internalvar_name (exp->elts[elt].internalvar));
1023
      elt += 2;
1024
      break;
1025
    case OP_FUNCALL:
1026
      {
1027
        int i, nargs;
1028
 
1029
        nargs = longest_to_int (exp->elts[elt].longconst);
1030
 
1031
        fprintf_filtered (stream, "Number of args: %d", nargs);
1032
        elt += 2;
1033
 
1034
        for (i = 1; i <= nargs + 1; i++)
1035
          elt = dump_subexp (exp, stream, elt);
1036
      }
1037
      break;
1038
    case OP_ARRAY:
1039
      {
1040
        int lower, upper;
1041
        int i;
1042
 
1043
        lower = longest_to_int (exp->elts[elt].longconst);
1044
        upper = longest_to_int (exp->elts[elt + 1].longconst);
1045
 
1046
        fprintf_filtered (stream, "Bounds [%d:%d]", lower, upper);
1047
        elt += 3;
1048
 
1049
        for (i = 1; i <= upper - lower + 1; i++)
1050
          elt = dump_subexp (exp, stream, elt);
1051
      }
1052
      break;
1053
    case UNOP_MEMVAL:
1054
    case UNOP_CAST:
1055
    case UNOP_DYNAMIC_CAST:
1056
    case UNOP_REINTERPRET_CAST:
1057
      fprintf_filtered (stream, "Type @");
1058
      gdb_print_host_address (exp->elts[elt].type, stream);
1059
      fprintf_filtered (stream, " (");
1060
      type_print (exp->elts[elt].type, NULL, stream, 0);
1061
      fprintf_filtered (stream, ")");
1062
      elt = dump_subexp (exp, stream, elt + 2);
1063
      break;
1064
    case UNOP_MEMVAL_TLS:
1065
      fprintf_filtered (stream, "TLS type @");
1066
      gdb_print_host_address (exp->elts[elt + 1].type, stream);
1067
      fprintf_filtered (stream, " (__thread /* \"%s\" */ ",
1068
                        (exp->elts[elt].objfile == NULL ? "(null)"
1069
                         : exp->elts[elt].objfile->name));
1070
      type_print (exp->elts[elt + 1].type, NULL, stream, 0);
1071
      fprintf_filtered (stream, ")");
1072
      elt = dump_subexp (exp, stream, elt + 3);
1073
      break;
1074
    case OP_TYPE:
1075
      fprintf_filtered (stream, "Type @");
1076
      gdb_print_host_address (exp->elts[elt].type, stream);
1077
      fprintf_filtered (stream, " (");
1078
      type_print (exp->elts[elt].type, NULL, stream, 0);
1079
      fprintf_filtered (stream, ")");
1080
      elt += 2;
1081
      break;
1082
    case STRUCTOP_STRUCT:
1083
    case STRUCTOP_PTR:
1084
      {
1085
        char *elem_name;
1086
        int len;
1087
 
1088
        len = longest_to_int (exp->elts[elt].longconst);
1089
        elem_name = &exp->elts[elt + 1].string;
1090
 
1091
        fprintf_filtered (stream, "Element name: `%.*s'", len, elem_name);
1092
        elt = dump_subexp (exp, stream, elt + 3 + BYTES_TO_EXP_ELEM (len + 1));
1093
      }
1094
      break;
1095
    case OP_SCOPE:
1096
      {
1097
        char *elem_name;
1098
        int len;
1099
 
1100
        fprintf_filtered (stream, "Type @");
1101
        gdb_print_host_address (exp->elts[elt].type, stream);
1102
        fprintf_filtered (stream, " (");
1103
        type_print (exp->elts[elt].type, NULL, stream, 0);
1104
        fprintf_filtered (stream, ") ");
1105
 
1106
        len = longest_to_int (exp->elts[elt + 1].longconst);
1107
        elem_name = &exp->elts[elt + 2].string;
1108
 
1109
        fprintf_filtered (stream, "Field name: `%.*s'", len, elem_name);
1110
        elt += 4 + BYTES_TO_EXP_ELEM (len + 1);
1111
      }
1112
      break;
1113
    default:
1114
    case OP_NULL:
1115
    case MULTI_SUBSCRIPT:
1116
    case OP_F77_UNDETERMINED_ARGLIST:
1117
    case OP_COMPLEX:
1118
    case OP_STRING:
1119
    case OP_BITSTRING:
1120
    case OP_BOOL:
1121
    case OP_M2_STRING:
1122
    case OP_THIS:
1123
    case OP_LABELED:
1124
    case OP_NAME:
1125
      fprintf_filtered (stream, "Unknown format");
1126
    }
1127
 
1128
  return elt;
1129
}
1130
 
1131
void
1132
dump_prefix_expression (struct expression *exp, struct ui_file *stream)
1133
{
1134
  int elt;
1135
 
1136
  fprintf_filtered (stream, "Dump of expression @ ");
1137
  gdb_print_host_address (exp, stream);
1138
  fputs_filtered (", after conversion to prefix form:\nExpression: `", stream);
1139
  if (exp->elts[0].opcode != OP_TYPE)
1140
    print_expression (exp, stream);
1141
  else
1142
    fputs_filtered ("Type printing not yet supported....", stream);
1143
  fprintf_filtered (stream, "'\n\tLanguage %s, %d elements, %ld bytes each.\n",
1144
                    exp->language_defn->la_name, exp->nelts,
1145
                    (long) sizeof (union exp_element));
1146
  fputs_filtered ("\n", stream);
1147
 
1148
  for (elt = 0; elt < exp->nelts;)
1149
    elt = dump_subexp (exp, stream, elt);
1150
  fputs_filtered ("\n", stream);
1151
}

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