gdb/f-typeprint.c

   1 /* Support for printing Fortran types for GDB, the GNU debugger.
   2    Copyright 1986, 1988, 1989, 1991, 1993, 1994 Free Software Foundation, Inc.
   3    Contributed by Motorola.  Adapted from the C version by Farooq Butt
   4    (fmbutt@engage.sps.mot.com).
   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, Boston, MA 02111-1307, USA.  */
  21
  22 #include "defs.h"
  23 #include "obstack.h"
  24 #include "bfd.h"
  25 #include "symtab.h"
  26 #include "gdbtypes.h"
  27 #include "expression.h"
  28 #include "value.h"
  29 #include "gdbcore.h"
  30 #include "target.h"
  31 #include "command.h"
  32 #include "gdbcmd.h"
  33 #include "language.h"
  34 #include "demangle.h"
  35 #include "f-lang.h"
  36 #include "typeprint.h"
  37 #include "frame.h"  /* ??? */
  38
  39 #include "gdb_string.h"
  40 #include <errno.h>
  41
  42 #if 0   /* Currently unused */
  43 static void f_type_print_args PARAMS ((struct type *, GDB_FILE *));
  44 #endif
  45
  46 static void print_equivalent_f77_float_type PARAMS ((struct type *,
  47                                                      GDB_FILE *));
  48
  49 static void f_type_print_varspec_suffix PARAMS ((struct type *, GDB_FILE *,
  50                                                  int, int, int));
  51
  52 void f_type_print_varspec_prefix PARAMS ((struct type *, GDB_FILE *,
  53                                           int, int));
  54
  55 void f_type_print_base PARAMS ((struct type *, GDB_FILE *, int, int));
  56
  57 \f
  58 /* LEVEL is the depth to indent lines by.  */
  59
  60 void
  61 f_print_type (type, varstring, stream, show, level)
  62      struct type *type;
  63      char *varstring;
  64      GDB_FILE *stream;
  65      int show;
  66      int level;
  67 {
  68   register enum type_code code;
  69   int demangled_args;
  70
  71   f_type_print_base (type, stream, show, level);
  72   code = TYPE_CODE (type);
  73   if ((varstring != NULL && *varstring != '\0')
  74       ||
  75       /* Need a space if going to print stars or brackets;
  76          but not if we will print just a type name.  */
  77       ((show > 0 || TYPE_NAME (type) == 0)
  78        &&
  79        (code == TYPE_CODE_PTR || code == TYPE_CODE_FUNC
  80         || code == TYPE_CODE_METHOD
  81         || code == TYPE_CODE_ARRAY
  82         || code == TYPE_CODE_MEMBER
  83         || code == TYPE_CODE_REF)))
  84     fputs_filtered (" ", stream);
  85   f_type_print_varspec_prefix (type, stream, show, 0);
  86
  87   fputs_filtered (varstring, stream);
  88
  89   /* For demangled function names, we have the arglist as part of the name,
  90      so don't print an additional pair of ()'s */
  91
  92   demangled_args = varstring[strlen(varstring) - 1] == ')';
  93   f_type_print_varspec_suffix (type, stream, show, 0, demangled_args);
  94 }
  95
  96 /* Print any asterisks or open-parentheses needed before the
  97    variable name (to describe its type).
  98
  99    On outermost call, pass 0 for PASSED_A_PTR.
 100    On outermost call, SHOW > 0 means should ignore
 101    any typename for TYPE and show its details.
 102    SHOW is always zero on recursive calls.  */
 103
 104 void
 105 f_type_print_varspec_prefix (type, stream, show, passed_a_ptr)
 106      struct type *type;
 107      GDB_FILE *stream;
 108      int show;
 109      int passed_a_ptr;
 110 {
 111   if (type == 0)
 112     return;
 113
 114   if (TYPE_NAME (type) && show <= 0)
 115     return;
 116
 117   QUIT;
 118
 119   switch (TYPE_CODE (type))
 120     {
 121     case TYPE_CODE_PTR:
 122       f_type_print_varspec_prefix (TYPE_TARGET_TYPE (type), stream, 0, 1);
 123       break;
 124
 125     case TYPE_CODE_FUNC:
 126       f_type_print_varspec_prefix (TYPE_TARGET_TYPE (type), stream, 0, 0);
 127       if (passed_a_ptr)
 128         fprintf_filtered (stream, "(");
 129       break;
 130
 131     case TYPE_CODE_ARRAY:
 132       f_type_print_varspec_prefix (TYPE_TARGET_TYPE (type), stream, 0, 0);
 133       break;
 134
 135     case TYPE_CODE_UNDEF:
 136     case TYPE_CODE_STRUCT:
 137     case TYPE_CODE_UNION:
 138     case TYPE_CODE_ENUM:
 139     case TYPE_CODE_INT:
 140     case TYPE_CODE_FLT:
 141     case TYPE_CODE_VOID:
 142     case TYPE_CODE_ERROR:
 143     case TYPE_CODE_CHAR:
 144     case TYPE_CODE_BOOL:
 145     case TYPE_CODE_SET:
 146     case TYPE_CODE_RANGE:
 147     case TYPE_CODE_STRING:
 148     case TYPE_CODE_BITSTRING:
 149     case TYPE_CODE_METHOD:
 150     case TYPE_CODE_MEMBER:
 151     case TYPE_CODE_REF:
 152     case TYPE_CODE_COMPLEX:
 153     case TYPE_CODE_TYPEDEF:
 154       /* These types need no prefix.  They are listed here so that
 155          gcc -Wall will reveal any types that haven't been handled.  */
 156       break;
 157     }
 158 }
 159
 160 #if 0   /* Currently unused */
 161
 162 static void
 163 f_type_print_args (type, stream)
 164      struct type *type;
 165      GDB_FILE *stream;
 166 {
 167   int i;
 168   struct type **args;
 169
 170   fprintf_filtered (stream, "(");
 171   args = TYPE_ARG_TYPES (type);
 172   if (args != NULL)
 173     {
 174       if (args[1] == NULL)
 175         {
 176           fprintf_filtered (stream, "...");
 177         }
 178       else
 179         {
 180           for (i = 1; args[i] != NULL && args[i]->code != TYPE_CODE_VOID; i++)
 181             {
 182               f_print_type (args[i], "", stream, -1, 0);
 183               if (args[i+1] == NULL)
 184                 fprintf_filtered (stream, "...");
 185               else if (args[i+1]->code != TYPE_CODE_VOID)
 186                 {
 187                   fprintf_filtered (stream, ",");
 188                   wrap_here ("    ");
 189                 }
 190             }
 191         }
 192     }
 193   fprintf_filtered (stream, ")");
 194 }
 195
 196 #endif  /* 0 */
 197
 198 /* Print any array sizes, function arguments or close parentheses
 199    needed after the variable name (to describe its type).
 200    Args work like c_type_print_varspec_prefix.  */
 201
 202 static void
 203 f_type_print_varspec_suffix (type, stream, show, passed_a_ptr, demangled_args)
 204      struct type *type;
 205      GDB_FILE *stream;
 206      int show;
 207      int passed_a_ptr;
 208      int demangled_args;
 209 {
 210   int upper_bound, lower_bound;
 211   int lower_bound_was_default = 0;
 212   static int arrayprint_recurse_level = 0;
 213   int retcode;
 214
 215   if (type == 0)
 216     return;
 217
 218   if (TYPE_NAME (type) && show <= 0)
 219     return;
 220
 221   QUIT;
 222
 223   switch (TYPE_CODE (type))
 224     {
 225     case TYPE_CODE_ARRAY:
 226       arrayprint_recurse_level++;
 227
 228       if (arrayprint_recurse_level == 1)
 229         fprintf_filtered(stream,"(");
 230
 231       if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_ARRAY)
 232         f_type_print_varspec_suffix (TYPE_TARGET_TYPE (type), stream, 0, 0, 0);
 233
 234       retcode = f77_get_dynamic_lowerbound (type,&lower_bound);
 235
 236       lower_bound_was_default = 0;
 237
 238       if (retcode == BOUND_FETCH_ERROR)
 239         fprintf_filtered (stream,"???");
 240       else
 241         if (lower_bound == 1) /* The default */
 242           lower_bound_was_default = 1;
 243         else
 244           fprintf_filtered (stream,"%d",lower_bound);
 245
 246       if (lower_bound_was_default)
 247         lower_bound_was_default = 0;
 248       else
 249         fprintf_filtered(stream,":");
 250
 251       /* Make sure that, if we have an assumed size array, we
 252          print out a warning and print the upperbound as '*' */
 253
 254       if (TYPE_ARRAY_UPPER_BOUND_TYPE(type) == BOUND_CANNOT_BE_DETERMINED)
 255         fprintf_filtered (stream, "*");
 256        else
 257          {
 258            retcode = f77_get_dynamic_upperbound(type,&upper_bound);
 259
 260            if (retcode == BOUND_FETCH_ERROR)
 261              fprintf_filtered(stream,"???");
 262            else
 263              fprintf_filtered(stream,"%d",upper_bound);
 264          }
 265
 266       if (TYPE_CODE (TYPE_TARGET_TYPE (type)) != TYPE_CODE_ARRAY)
 267         f_type_print_varspec_suffix (TYPE_TARGET_TYPE (type), stream, 0, 0, 0);
 268       if (arrayprint_recurse_level == 1)
 269         fprintf_filtered (stream, ")");
 270       else
 271         fprintf_filtered(stream,",");
 272       arrayprint_recurse_level--;
 273       break;
 274
 275     case TYPE_CODE_PTR:
 276     case TYPE_CODE_REF:
 277       f_type_print_varspec_suffix (TYPE_TARGET_TYPE (type), stream, 0, 1, 0);
 278       fprintf_filtered(stream,")");
 279       break;
 280
 281     case TYPE_CODE_FUNC:
 282       f_type_print_varspec_suffix (TYPE_TARGET_TYPE (type), stream, 0,
 283                                  passed_a_ptr, 0);
 284       if (passed_a_ptr)
 285         fprintf_filtered (stream, ")");
 286
 287       fprintf_filtered (stream, "()");
 288       break;
 289
 290     case TYPE_CODE_UNDEF:
 291     case TYPE_CODE_STRUCT:
 292     case TYPE_CODE_UNION:
 293     case TYPE_CODE_ENUM:
 294     case TYPE_CODE_INT:
 295     case TYPE_CODE_FLT:
 296     case TYPE_CODE_VOID:
 297     case TYPE_CODE_ERROR:
 298     case TYPE_CODE_CHAR:
 299     case TYPE_CODE_BOOL:
 300     case TYPE_CODE_SET:
 301     case TYPE_CODE_RANGE:
 302     case TYPE_CODE_STRING:
 303     case TYPE_CODE_BITSTRING:
 304     case TYPE_CODE_METHOD:
 305     case TYPE_CODE_MEMBER:
 306     case TYPE_CODE_COMPLEX:
 307     case TYPE_CODE_TYPEDEF:
 308       /* These types do not need a suffix.  They are listed so that
 309          gcc -Wall will report types that may not have been considered.  */
 310       break;
 311     }
 312 }
 313
 314 static void
 315 print_equivalent_f77_float_type (type, stream)
 316      struct type *type;
 317      GDB_FILE *stream;
 318 {
 319   /* Override type name "float" and make it the
 320      appropriate real. XLC stupidly outputs -12 as a type
 321      for real when it really should be outputting -18 */
 322
 323   fprintf_filtered (stream, "real*%d", TYPE_LENGTH (type));
 324 }
 325
 326 /* Print the name of the type (or the ultimate pointer target,
 327    function value or array element), or the description of a
 328    structure or union.
 329
 330    SHOW nonzero means don't print this type as just its name;
 331    show its real definition even if it has a name.
 332    SHOW zero means print just typename or struct tag if there is one
 333    SHOW negative means abbreviate structure elements.
 334    SHOW is decremented for printing of structure elements.
 335
 336    LEVEL is the depth to indent by.
 337    We increase it for some recursive calls.  */
 338
 339 void
 340 f_type_print_base (type, stream, show, level)
 341      struct type *type;
 342      GDB_FILE *stream;
 343      int show;
 344      int level;
 345 {
 346   int retcode;
 347   int upper_bound;
 348
 349   QUIT;
 350
 351   wrap_here ("    ");
 352   if (type == NULL)
 353     {
 354       fputs_filtered ("<type unknown>", stream);
 355       return;
 356     }
 357
 358   /* When SHOW is zero or less, and there is a valid type name, then always
 359      just print the type name directly from the type. */
 360
 361   if ((show <= 0) && (TYPE_NAME (type) != NULL))
 362     {
 363       if (TYPE_CODE (type) == TYPE_CODE_FLT)
 364         print_equivalent_f77_float_type (type, stream);
 365       else
 366         fputs_filtered (TYPE_NAME (type), stream);
 367       return;
 368     }
 369
 370   if (TYPE_CODE (type) != TYPE_CODE_TYPEDEF)
 371     CHECK_TYPEDEF (type);
 372
 373   switch (TYPE_CODE (type))
 374     {
 375     case TYPE_CODE_TYPEDEF:
 376       f_type_print_base (TYPE_TARGET_TYPE (type), stream, 0, level);
 377       break;
 378
 379     case TYPE_CODE_ARRAY:
 380     case TYPE_CODE_FUNC:
 381       f_type_print_base (TYPE_TARGET_TYPE (type), stream, show, level);
 382       break;
 383
 384    case TYPE_CODE_PTR:
 385       fprintf_filtered (stream, "PTR TO -> ( ");
 386       f_type_print_base (TYPE_TARGET_TYPE (type), stream, 0, level);
 387       break;
 388
 389     case TYPE_CODE_VOID:
 390       fprintf_filtered (stream, "VOID");
 391       break;
 392
 393     case TYPE_CODE_UNDEF:
 394       fprintf_filtered (stream, "struct <unknown>");
 395       break;
 396
 397     case TYPE_CODE_ERROR:
 398       fprintf_filtered (stream, "<unknown type>");
 399       break;
 400
 401     case TYPE_CODE_RANGE:
 402       /* This should not occur */
 403       fprintf_filtered (stream, "<range type>");
 404       break;
 405
 406     case TYPE_CODE_CHAR:
 407       /* Override name "char" and make it "character" */
 408       fprintf_filtered (stream, "character");
 409       break;
 410
 411     case TYPE_CODE_INT:
 412       /* There may be some character types that attempt to come
 413          through as TYPE_CODE_INT since dbxstclass.h is so
 414          C-oriented, we must change these to "character" from "char".  */
 415
 416       if (STREQ (TYPE_NAME (type), "char"))
 417         fprintf_filtered (stream, "character");
 418       else
 419         goto default_case;
 420       break;
 421
 422     case TYPE_CODE_COMPLEX:
 423       fprintf_filtered (stream, "complex*%d", TYPE_LENGTH (type));
 424       break;
 425
 426     case TYPE_CODE_FLT:
 427       print_equivalent_f77_float_type (type, stream);
 428       break;
 429
 430     case TYPE_CODE_STRING:
 431       /* Strings may have dynamic upperbounds (lengths) like arrays. */
 432
 433       if (TYPE_ARRAY_UPPER_BOUND_TYPE (type) == BOUND_CANNOT_BE_DETERMINED)
 434         fprintf_filtered (stream, "character*(*)");
 435       else
 436         {
 437           retcode = f77_get_dynamic_upperbound (type, &upper_bound);
 438
 439           if (retcode == BOUND_FETCH_ERROR)
 440             fprintf_filtered (stream, "character*???");
 441           else
 442             fprintf_filtered (stream, "character*%d", upper_bound);
 443         }
 444       break;
 445
 446     default_case:
 447     default:
 448       /* Handle types not explicitly handled by the other cases,
 449          such as fundamental types.  For these, just print whatever
 450          the type name is, as recorded in the type itself.  If there
 451          is no type name, then complain. */
 452       if (TYPE_NAME (type) != NULL)
 453         fputs_filtered (TYPE_NAME (type), stream);
 454       else
 455         error ("Invalid type code (%d) in symbol table.", TYPE_CODE (type));
 456       break;
 457     }
 458 }