gdb/f-typeprint.c

   1 /* Support for printing Fortran types for GDB, the GNU debugger.
   2
   3    Copyright (C) 1986-2015 Free Software Foundation, Inc.
   4
   5    Contributed by Motorola.  Adapted from the C version by Farooq Butt
   6    (fmbutt@engage.sps.mot.com).
   7
   8    This file is part of GDB.
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  22
  23 #include "defs.h"
  24 #include "gdb_obstack.h"
  25 #include "bfd.h"
  26 #include "symtab.h"
  27 #include "gdbtypes.h"
  28 #include "expression.h"
  29 #include "value.h"
  30 #include "gdbcore.h"
  31 #include "target.h"
  32 #include "f-lang.h"
  33
  34 #if 0                           /* Currently unused.  */
  35 static void f_type_print_args (struct type *, struct ui_file *);
  36 #endif
  37
  38 static void f_type_print_varspec_suffix (struct type *, struct ui_file *, int,
  39                                          int, int, int);
  40
  41 void f_type_print_varspec_prefix (struct type *, struct ui_file *,
  42                                   int, int);
  43
  44 void f_type_print_base (struct type *, struct ui_file *, int, int);
  45 \f
  46
  47 /* LEVEL is the depth to indent lines by.  */
  48
  49 void
  50 f_print_type (struct type *type, const char *varstring, struct ui_file *stream,
  51               int show, int level, const struct type_print_options *flags)
  52 {
  53   enum type_code code;
  54   int demangled_args;
  55
  56   f_type_print_base (type, stream, show, level);
  57   code = TYPE_CODE (type);
  58   if ((varstring != NULL && *varstring != '\0')
  59   /* Need a space if going to print stars or brackets;
  60      but not if we will print just a type name.  */
  61       || ((show > 0 || TYPE_NAME (type) == 0)
  62           && (code == TYPE_CODE_PTR || code == TYPE_CODE_FUNC
  63               || code == TYPE_CODE_METHOD
  64               || code == TYPE_CODE_ARRAY
  65               || code == TYPE_CODE_REF)))
  66     fputs_filtered (" ", stream);
  67   f_type_print_varspec_prefix (type, stream, show, 0);
  68
  69   if (varstring != NULL)
  70     {
  71       fputs_filtered (varstring, stream);
  72
  73       /* For demangled function names, we have the arglist as part of the name,
  74          so don't print an additional pair of ()'s.  */
  75
  76       demangled_args = varstring[strlen (varstring) - 1] == ')';
  77       f_type_print_varspec_suffix (type, stream, show, 0, demangled_args, 0);
  78    }
  79 }
  80
  81 /* Print any asterisks or open-parentheses needed before the
  82    variable name (to describe its type).
  83
  84    On outermost call, pass 0 for PASSED_A_PTR.
  85    On outermost call, SHOW > 0 means should ignore
  86    any typename for TYPE and show its details.
  87    SHOW is always zero on recursive calls.  */
  88
  89 void
  90 f_type_print_varspec_prefix (struct type *type, struct ui_file *stream,
  91                              int show, int passed_a_ptr)
  92 {
  93   if (type == 0)
  94     return;
  95
  96   if (TYPE_NAME (type) && show <= 0)
  97     return;
  98
  99   QUIT;
 100
 101   switch (TYPE_CODE (type))
 102     {
 103     case TYPE_CODE_PTR:
 104       f_type_print_varspec_prefix (TYPE_TARGET_TYPE (type), stream, 0, 1);
 105       break;
 106
 107     case TYPE_CODE_FUNC:
 108       f_type_print_varspec_prefix (TYPE_TARGET_TYPE (type), stream, 0, 0);
 109       if (passed_a_ptr)
 110         fprintf_filtered (stream, "(");
 111       break;
 112
 113     case TYPE_CODE_ARRAY:
 114       f_type_print_varspec_prefix (TYPE_TARGET_TYPE (type), stream, 0, 0);
 115       break;
 116
 117     case TYPE_CODE_UNDEF:
 118     case TYPE_CODE_STRUCT:
 119     case TYPE_CODE_UNION:
 120     case TYPE_CODE_ENUM:
 121     case TYPE_CODE_INT:
 122     case TYPE_CODE_FLT:
 123     case TYPE_CODE_VOID:
 124     case TYPE_CODE_ERROR:
 125     case TYPE_CODE_CHAR:
 126     case TYPE_CODE_BOOL:
 127     case TYPE_CODE_SET:
 128     case TYPE_CODE_RANGE:
 129     case TYPE_CODE_STRING:
 130     case TYPE_CODE_METHOD:
 131     case TYPE_CODE_REF:
 132     case TYPE_CODE_COMPLEX:
 133     case TYPE_CODE_TYPEDEF:
 134       /* These types need no prefix.  They are listed here so that
 135          gcc -Wall will reveal any types that haven't been handled.  */
 136       break;
 137     }
 138 }
 139
 140 /* Print any array sizes, function arguments or close parentheses
 141    needed after the variable name (to describe its type).
 142    Args work like c_type_print_varspec_prefix.  */
 143
 144 static void
 145 f_type_print_varspec_suffix (struct type *type, struct ui_file *stream,
 146                              int show, int passed_a_ptr, int demangled_args,
 147                              int arrayprint_recurse_level)
 148 {
 149   int upper_bound, lower_bound;
 150
 151   /* No static variables are permitted as an error call may occur during
 152      execution of this function.  */
 153
 154   if (type == 0)
 155     return;
 156
 157   if (TYPE_NAME (type) && show <= 0)
 158     return;
 159
 160   QUIT;
 161
 162   switch (TYPE_CODE (type))
 163     {
 164     case TYPE_CODE_ARRAY:
 165       arrayprint_recurse_level++;
 166
 167       if (arrayprint_recurse_level == 1)
 168         fprintf_filtered (stream, "(");
 169
 170       if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_ARRAY)
 171         f_type_print_varspec_suffix (TYPE_TARGET_TYPE (type), stream, 0, 0, 0,
 172                                      arrayprint_recurse_level);
 173
 174       lower_bound = f77_get_lowerbound (type);
 175       if (lower_bound != 1)     /* Not the default.  */
 176         fprintf_filtered (stream, "%d:", lower_bound);
 177
 178       /* Make sure that, if we have an assumed size array, we
 179          print out a warning and print the upperbound as '*'.  */
 180
 181       if (TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type))
 182         fprintf_filtered (stream, "*");
 183       else
 184         {
 185           upper_bound = f77_get_upperbound (type);
 186           fprintf_filtered (stream, "%d", upper_bound);
 187         }
 188
 189       if (TYPE_CODE (TYPE_TARGET_TYPE (type)) != TYPE_CODE_ARRAY)
 190         f_type_print_varspec_suffix (TYPE_TARGET_TYPE (type), stream, 0, 0, 0,
 191                                      arrayprint_recurse_level);
 192       if (arrayprint_recurse_level == 1)
 193         fprintf_filtered (stream, ")");
 194       else
 195         fprintf_filtered (stream, ",");
 196       arrayprint_recurse_level--;
 197       break;
 198
 199     case TYPE_CODE_PTR:
 200     case TYPE_CODE_REF:
 201       f_type_print_varspec_suffix (TYPE_TARGET_TYPE (type), stream, 0, 1, 0,
 202                                    arrayprint_recurse_level);
 203       fprintf_filtered (stream, ")");
 204       break;
 205
 206     case TYPE_CODE_FUNC:
 207       f_type_print_varspec_suffix (TYPE_TARGET_TYPE (type), stream, 0,
 208                                    passed_a_ptr, 0, arrayprint_recurse_level);
 209       if (passed_a_ptr)
 210         fprintf_filtered (stream, ")");
 211
 212       fprintf_filtered (stream, "()");
 213       break;
 214
 215     case TYPE_CODE_UNDEF:
 216     case TYPE_CODE_STRUCT:
 217     case TYPE_CODE_UNION:
 218     case TYPE_CODE_ENUM:
 219     case TYPE_CODE_INT:
 220     case TYPE_CODE_FLT:
 221     case TYPE_CODE_VOID:
 222     case TYPE_CODE_ERROR:
 223     case TYPE_CODE_CHAR:
 224     case TYPE_CODE_BOOL:
 225     case TYPE_CODE_SET:
 226     case TYPE_CODE_RANGE:
 227     case TYPE_CODE_STRING:
 228     case TYPE_CODE_METHOD:
 229     case TYPE_CODE_COMPLEX:
 230     case TYPE_CODE_TYPEDEF:
 231       /* These types do not need a suffix.  They are listed so that
 232          gcc -Wall will report types that may not have been considered.  */
 233       break;
 234     }
 235 }
 236
 237 /* Print the name of the type (or the ultimate pointer target,
 238    function value or array element), or the description of a
 239    structure or union.
 240
 241    SHOW nonzero means don't print this type as just its name;
 242    show its real definition even if it has a name.
 243    SHOW zero means print just typename or struct tag if there is one
 244    SHOW negative means abbreviate structure elements.
 245    SHOW is decremented for printing of structure elements.
 246
 247    LEVEL is the depth to indent by.
 248    We increase it for some recursive calls.  */
 249
 250 void
 251 f_type_print_base (struct type *type, struct ui_file *stream, int show,
 252                    int level)
 253 {
 254   int upper_bound;
 255   int index;
 256
 257   QUIT;
 258
 259   wrap_here ("    ");
 260   if (type == NULL)
 261     {
 262       fputs_filtered ("<type unknown>", stream);
 263       return;
 264     }
 265
 266   /* When SHOW is zero or less, and there is a valid type name, then always
 267      just print the type name directly from the type.  */
 268
 269   if ((show <= 0) && (TYPE_NAME (type) != NULL))
 270     {
 271       fputs_filtered (TYPE_NAME (type), stream);
 272       return;
 273     }
 274
 275   if (TYPE_CODE (type) != TYPE_CODE_TYPEDEF)
 276     CHECK_TYPEDEF (type);
 277
 278   switch (TYPE_CODE (type))
 279     {
 280     case TYPE_CODE_TYPEDEF:
 281       f_type_print_base (TYPE_TARGET_TYPE (type), stream, 0, level);
 282       break;
 283
 284     case TYPE_CODE_ARRAY:
 285     case TYPE_CODE_FUNC:
 286       f_type_print_base (TYPE_TARGET_TYPE (type), stream, show, level);
 287       break;
 288
 289     case TYPE_CODE_PTR:
 290       fprintf_filtered (stream, "PTR TO -> ( ");
 291       f_type_print_base (TYPE_TARGET_TYPE (type), stream, 0, level);
 292       break;
 293
 294     case TYPE_CODE_REF:
 295       fprintf_filtered (stream, "REF TO -> ( ");
 296       f_type_print_base (TYPE_TARGET_TYPE (type), stream, 0, level);
 297       break;
 298
 299     case TYPE_CODE_VOID:
 300       fprintfi_filtered (level, stream, "VOID");
 301       break;
 302
 303     case TYPE_CODE_UNDEF:
 304       fprintfi_filtered (level, stream, "struct <unknown>");
 305       break;
 306
 307     case TYPE_CODE_ERROR:
 308       fprintfi_filtered (level, stream, "%s", TYPE_ERROR_NAME (type));
 309       break;
 310
 311     case TYPE_CODE_RANGE:
 312       /* This should not occur.  */
 313       fprintfi_filtered (level, stream, "<range type>");
 314       break;
 315
 316     case TYPE_CODE_CHAR:
 317     case TYPE_CODE_INT:
 318       /* There may be some character types that attempt to come
 319          through as TYPE_CODE_INT since dbxstclass.h is so
 320          C-oriented, we must change these to "character" from "char".  */
 321
 322       if (strcmp (TYPE_NAME (type), "char") == 0)
 323         fprintfi_filtered (level, stream, "character");
 324       else
 325         goto default_case;
 326       break;
 327
 328     case TYPE_CODE_STRING:
 329       /* Strings may have dynamic upperbounds (lengths) like arrays.  */
 330
 331       if (TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type))
 332         fprintfi_filtered (level, stream, "character*(*)");
 333       else
 334         {
 335           upper_bound = f77_get_upperbound (type);
 336           fprintf_filtered (stream, "character*%d", upper_bound);
 337         }
 338       break;
 339
 340     case TYPE_CODE_STRUCT:
 341     case TYPE_CODE_UNION:
 342       if (TYPE_CODE (type) == TYPE_CODE_UNION)
 343         fprintfi_filtered (level, stream, "Type, C_Union :: ");
 344       else
 345         fprintfi_filtered (level, stream, "Type ");
 346       fputs_filtered (TYPE_TAG_NAME (type), stream);
 347       fputs_filtered ("\n", stream);
 348       for (index = 0; index < TYPE_NFIELDS (type); index++)
 349         {
 350           f_type_print_base (TYPE_FIELD_TYPE (type, index), stream, show,
 351                              level + 4);
 352           fputs_filtered (" :: ", stream);
 353           fputs_filtered (TYPE_FIELD_NAME (type, index), stream);
 354           f_type_print_varspec_suffix (TYPE_FIELD_TYPE (type, index),
 355                                        stream, 0, 0, 0, 0);
 356           fputs_filtered ("\n", stream);
 357         }
 358       fprintfi_filtered (level, stream, "End Type ");
 359       fputs_filtered (TYPE_TAG_NAME (type), stream);
 360       break;
 361
 362     case TYPE_CODE_MODULE:
 363       fprintfi_filtered (level, stream, "module %s", TYPE_TAG_NAME (type));
 364       break;
 365
 366     default_case:
 367     default:
 368       /* Handle types not explicitly handled by the other cases,
 369          such as fundamental types.  For these, just print whatever
 370          the type name is, as recorded in the type itself.  If there
 371          is no type name, then complain.  */
 372       if (TYPE_NAME (type) != NULL)
 373         fprintfi_filtered (level, stream, "%s", TYPE_NAME (type));
 374       else
 375         error (_("Invalid type code (%d) in symbol table."), TYPE_CODE (type));
 376       break;
 377     }
 378 }