gdb/f-typeprint.c

   1 /* Support for printing Fortran types for GDB, the GNU debugger.
   2
   3    Copyright (C) 1986, 1988-1989, 1991, 1993-1996, 1998, 2000-2003,
   4    2006-2012 Free Software Foundation, Inc.
   5
   6    Contributed by Motorola.  Adapted from the C version by Farooq Butt
   7    (fmbutt@engage.sps.mot.com).
   8
   9    This file is part of GDB.
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 3 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  23
  24 #include "defs.h"
  25 #include "gdb_obstack.h"
  26 #include "bfd.h"
  27 #include "symtab.h"
  28 #include "gdbtypes.h"
  29 #include "expression.h"
  30 #include "value.h"
  31 #include "gdbcore.h"
  32 #include "target.h"
  33 #include "f-lang.h"
  34
  35 #include "gdb_string.h"
  36 #include <errno.h>
  37
  38 #if 0                           /* Currently unused.  */
  39 static void f_type_print_args (struct type *, struct ui_file *);
  40 #endif
  41
  42 static void f_type_print_varspec_suffix (struct type *, struct ui_file *, int,
  43                                          int, int, int);
  44
  45 void f_type_print_varspec_prefix (struct type *, struct ui_file *,
  46                                   int, int);
  47
  48 void f_type_print_base (struct type *, struct ui_file *, int, int);
  49 \f
  50
  51 /* LEVEL is the depth to indent lines by.  */
  52
  53 void
  54 f_print_type (struct type *type, const char *varstring, struct ui_file *stream,
  55               int show, int level)
  56 {
  57   enum type_code code;
  58   int demangled_args;
  59
  60   f_type_print_base (type, stream, show, level);
  61   code = TYPE_CODE (type);
  62   if ((varstring != NULL && *varstring != '\0')
  63   /* Need a space if going to print stars or brackets;
  64      but not if we will print just a type name.  */
  65       || ((show > 0 || TYPE_NAME (type) == 0)
  66           && (code == TYPE_CODE_PTR || code == TYPE_CODE_FUNC
  67               || code == TYPE_CODE_METHOD
  68               || code == TYPE_CODE_ARRAY
  69               || code == TYPE_CODE_REF)))
  70     fputs_filtered (" ", stream);
  71   f_type_print_varspec_prefix (type, stream, show, 0);
  72
  73   if (varstring != NULL)
  74     {
  75       fputs_filtered (varstring, stream);
  76
  77       /* For demangled function names, we have the arglist as part of the name,
  78          so don't print an additional pair of ()'s.  */
  79
  80       demangled_args = varstring[strlen (varstring) - 1] == ')';
  81       f_type_print_varspec_suffix (type, stream, show, 0, demangled_args, 0);
  82    }
  83 }
  84
  85 /* Print any asterisks or open-parentheses needed before the
  86    variable name (to describe its type).
  87
  88    On outermost call, pass 0 for PASSED_A_PTR.
  89    On outermost call, SHOW > 0 means should ignore
  90    any typename for TYPE and show its details.
  91    SHOW is always zero on recursive calls.  */
  92
  93 void
  94 f_type_print_varspec_prefix (struct type *type, struct ui_file *stream,
  95                              int show, int passed_a_ptr)
  96 {
  97   if (type == 0)
  98     return;
  99
 100   if (TYPE_NAME (type) && show <= 0)
 101     return;
 102
 103   QUIT;
 104
 105   switch (TYPE_CODE (type))
 106     {
 107     case TYPE_CODE_PTR:
 108       f_type_print_varspec_prefix (TYPE_TARGET_TYPE (type), stream, 0, 1);
 109       break;
 110
 111     case TYPE_CODE_FUNC:
 112       f_type_print_varspec_prefix (TYPE_TARGET_TYPE (type), stream, 0, 0);
 113       if (passed_a_ptr)
 114         fprintf_filtered (stream, "(");
 115       break;
 116
 117     case TYPE_CODE_ARRAY:
 118       f_type_print_varspec_prefix (TYPE_TARGET_TYPE (type), stream, 0, 0);
 119       break;
 120
 121     case TYPE_CODE_UNDEF:
 122     case TYPE_CODE_STRUCT:
 123     case TYPE_CODE_UNION:
 124     case TYPE_CODE_ENUM:
 125     case TYPE_CODE_INT:
 126     case TYPE_CODE_FLT:
 127     case TYPE_CODE_VOID:
 128     case TYPE_CODE_ERROR:
 129     case TYPE_CODE_CHAR:
 130     case TYPE_CODE_BOOL:
 131     case TYPE_CODE_SET:
 132     case TYPE_CODE_RANGE:
 133     case TYPE_CODE_STRING:
 134     case TYPE_CODE_METHOD:
 135     case TYPE_CODE_REF:
 136     case TYPE_CODE_COMPLEX:
 137     case TYPE_CODE_TYPEDEF:
 138       /* These types need no prefix.  They are listed here so that
 139          gcc -Wall will reveal any types that haven't been handled.  */
 140       break;
 141     }
 142 }
 143
 144 /* Print any array sizes, function arguments or close parentheses
 145    needed after the variable name (to describe its type).
 146    Args work like c_type_print_varspec_prefix.  */
 147
 148 static void
 149 f_type_print_varspec_suffix (struct type *type, struct ui_file *stream,
 150                              int show, int passed_a_ptr, int demangled_args,
 151                              int arrayprint_recurse_level)
 152 {
 153   int upper_bound, lower_bound;
 154
 155   /* No static variables are permitted as an error call may occur during
 156      execution of this function.  */
 157
 158   if (type == 0)
 159     return;
 160
 161   if (TYPE_NAME (type) && show <= 0)
 162     return;
 163
 164   QUIT;
 165
 166   switch (TYPE_CODE (type))
 167     {
 168     case TYPE_CODE_ARRAY:
 169       arrayprint_recurse_level++;
 170
 171       if (arrayprint_recurse_level == 1)
 172         fprintf_filtered (stream, "(");
 173
 174       if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_ARRAY)
 175         f_type_print_varspec_suffix (TYPE_TARGET_TYPE (type), stream, 0, 0, 0,
 176                                      arrayprint_recurse_level);
 177
 178       lower_bound = f77_get_lowerbound (type);
 179       if (lower_bound != 1)     /* Not the default.  */
 180         fprintf_filtered (stream, "%d:", lower_bound);
 181
 182       /* Make sure that, if we have an assumed size array, we
 183          print out a warning and print the upperbound as '*'.  */
 184
 185       if (TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type))
 186         fprintf_filtered (stream, "*");
 187       else
 188         {
 189           upper_bound = f77_get_upperbound (type);
 190           fprintf_filtered (stream, "%d", upper_bound);
 191         }
 192
 193       if (TYPE_CODE (TYPE_TARGET_TYPE (type)) != TYPE_CODE_ARRAY)
 194         f_type_print_varspec_suffix (TYPE_TARGET_TYPE (type), stream, 0, 0, 0,
 195                                      arrayprint_recurse_level);
 196       if (arrayprint_recurse_level == 1)
 197         fprintf_filtered (stream, ")");
 198       else
 199         fprintf_filtered (stream, ",");
 200       arrayprint_recurse_level--;
 201       break;
 202
 203     case TYPE_CODE_PTR:
 204     case TYPE_CODE_REF:
 205       f_type_print_varspec_suffix (TYPE_TARGET_TYPE (type), stream, 0, 1, 0,
 206                                    arrayprint_recurse_level);
 207       fprintf_filtered (stream, ")");
 208       break;
 209
 210     case TYPE_CODE_FUNC:
 211       f_type_print_varspec_suffix (TYPE_TARGET_TYPE (type), stream, 0,
 212                                    passed_a_ptr, 0, arrayprint_recurse_level);
 213       if (passed_a_ptr)
 214         fprintf_filtered (stream, ")");
 215
 216       fprintf_filtered (stream, "()");
 217       break;
 218
 219     case TYPE_CODE_UNDEF:
 220     case TYPE_CODE_STRUCT:
 221     case TYPE_CODE_UNION:
 222     case TYPE_CODE_ENUM:
 223     case TYPE_CODE_INT:
 224     case TYPE_CODE_FLT:
 225     case TYPE_CODE_VOID:
 226     case TYPE_CODE_ERROR:
 227     case TYPE_CODE_CHAR:
 228     case TYPE_CODE_BOOL:
 229     case TYPE_CODE_SET:
 230     case TYPE_CODE_RANGE:
 231     case TYPE_CODE_STRING:
 232     case TYPE_CODE_METHOD:
 233     case TYPE_CODE_COMPLEX:
 234     case TYPE_CODE_TYPEDEF:
 235       /* These types do not need a suffix.  They are listed so that
 236          gcc -Wall will report types that may not have been considered.  */
 237       break;
 238     }
 239 }
 240
 241 /* Print the name of the type (or the ultimate pointer target,
 242    function value or array element), or the description of a
 243    structure or union.
 244
 245    SHOW nonzero means don't print this type as just its name;
 246    show its real definition even if it has a name.
 247    SHOW zero means print just typename or struct tag if there is one
 248    SHOW negative means abbreviate structure elements.
 249    SHOW is decremented for printing of structure elements.
 250
 251    LEVEL is the depth to indent by.
 252    We increase it for some recursive calls.  */
 253
 254 void
 255 f_type_print_base (struct type *type, struct ui_file *stream, int show,
 256                    int level)
 257 {
 258   int upper_bound;
 259   int index;
 260
 261   QUIT;
 262
 263   wrap_here ("    ");
 264   if (type == NULL)
 265     {
 266       fputs_filtered ("<type unknown>", stream);
 267       return;
 268     }
 269
 270   /* When SHOW is zero or less, and there is a valid type name, then always
 271      just print the type name directly from the type.  */
 272
 273   if ((show <= 0) && (TYPE_NAME (type) != NULL))
 274     {
 275       fputs_filtered (TYPE_NAME (type), stream);
 276       return;
 277     }
 278
 279   if (TYPE_CODE (type) != TYPE_CODE_TYPEDEF)
 280     CHECK_TYPEDEF (type);
 281
 282   switch (TYPE_CODE (type))
 283     {
 284     case TYPE_CODE_TYPEDEF:
 285       f_type_print_base (TYPE_TARGET_TYPE (type), stream, 0, level);
 286       break;
 287
 288     case TYPE_CODE_ARRAY:
 289     case TYPE_CODE_FUNC:
 290       f_type_print_base (TYPE_TARGET_TYPE (type), stream, show, level);
 291       break;
 292
 293     case TYPE_CODE_PTR:
 294       fprintf_filtered (stream, "PTR TO -> ( ");
 295       f_type_print_base (TYPE_TARGET_TYPE (type), stream, 0, level);
 296       break;
 297
 298     case TYPE_CODE_REF:
 299       fprintf_filtered (stream, "REF TO -> ( ");
 300       f_type_print_base (TYPE_TARGET_TYPE (type), stream, 0, level);
 301       break;
 302
 303     case TYPE_CODE_VOID:
 304       fprintfi_filtered (level, stream, "VOID");
 305       break;
 306
 307     case TYPE_CODE_UNDEF:
 308       fprintfi_filtered (level, stream, "struct <unknown>");
 309       break;
 310
 311     case TYPE_CODE_ERROR:
 312       fprintfi_filtered (level, stream, "%s", TYPE_ERROR_NAME (type));
 313       break;
 314
 315     case TYPE_CODE_RANGE:
 316       /* This should not occur.  */
 317       fprintfi_filtered (level, stream, "<range type>");
 318       break;
 319
 320     case TYPE_CODE_CHAR:
 321     case TYPE_CODE_INT:
 322       /* There may be some character types that attempt to come
 323          through as TYPE_CODE_INT since dbxstclass.h is so
 324          C-oriented, we must change these to "character" from "char".  */
 325
 326       if (strcmp (TYPE_NAME (type), "char") == 0)
 327         fprintfi_filtered (level, stream, "character");
 328       else
 329         goto default_case;
 330       break;
 331
 332     case TYPE_CODE_STRING:
 333       /* Strings may have dynamic upperbounds (lengths) like arrays.  */
 334
 335       if (TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type))
 336         fprintfi_filtered (level, stream, "character*(*)");
 337       else
 338         {
 339           upper_bound = f77_get_upperbound (type);
 340           fprintf_filtered (stream, "character*%d", upper_bound);
 341         }
 342       break;
 343
 344     case TYPE_CODE_STRUCT:
 345     case TYPE_CODE_UNION:
 346       if (TYPE_CODE (type) == TYPE_CODE_UNION)
 347         fprintfi_filtered (level, stream, "Type, C_Union :: ");
 348       else
 349         fprintfi_filtered (level, stream, "Type ");
 350       fputs_filtered (TYPE_TAG_NAME (type), stream);
 351       fputs_filtered ("\n", stream);
 352       for (index = 0; index < TYPE_NFIELDS (type); index++)
 353         {
 354           f_type_print_base (TYPE_FIELD_TYPE (type, index), stream, show,
 355                              level + 4);
 356           fputs_filtered (" :: ", stream);
 357           fputs_filtered (TYPE_FIELD_NAME (type, index), stream);
 358           f_type_print_varspec_suffix (TYPE_FIELD_TYPE (type, index),
 359                                        stream, 0, 0, 0, 0);
 360           fputs_filtered ("\n", stream);
 361         }
 362       fprintfi_filtered (level, stream, "End Type ");
 363       fputs_filtered (TYPE_TAG_NAME (type), stream);
 364       break;
 365
 366     case TYPE_CODE_MODULE:
 367       fprintfi_filtered (level, stream, "module %s", TYPE_TAG_NAME (type));
 368       break;
 369
 370     default_case:
 371     default:
 372       /* Handle types not explicitly handled by the other cases,
 373          such as fundamental types.  For these, just print whatever
 374          the type name is, as recorded in the type itself.  If there
 375          is no type name, then complain.  */
 376       if (TYPE_NAME (type) != NULL)
 377         fprintfi_filtered (level, stream, "%s", TYPE_NAME (type));
 378       else
 379         error (_("Invalid type code (%d) in symbol table."), TYPE_CODE (type));
 380       break;
 381     }
 382 }