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_BITSTRING:
 135     case TYPE_CODE_METHOD:
 136     case TYPE_CODE_REF:
 137     case TYPE_CODE_COMPLEX:
 138     case TYPE_CODE_TYPEDEF:
 139       /* These types need no prefix.  They are listed here so that
 140          gcc -Wall will reveal any types that haven't been handled.  */
 141       break;
 142     }
 143 }
 144
 145 /* Print any array sizes, function arguments or close parentheses
 146    needed after the variable name (to describe its type).
 147    Args work like c_type_print_varspec_prefix.  */
 148
 149 static void
 150 f_type_print_varspec_suffix (struct type *type, struct ui_file *stream,
 151                              int show, int passed_a_ptr, int demangled_args,
 152                              int arrayprint_recurse_level)
 153 {
 154   int upper_bound, lower_bound;
 155
 156   /* No static variables are permitted as an error call may occur during
 157      execution of this function.  */
 158
 159   if (type == 0)
 160     return;
 161
 162   if (TYPE_NAME (type) && show <= 0)
 163     return;
 164
 165   QUIT;
 166
 167   switch (TYPE_CODE (type))
 168     {
 169     case TYPE_CODE_ARRAY:
 170       arrayprint_recurse_level++;
 171
 172       if (arrayprint_recurse_level == 1)
 173         fprintf_filtered (stream, "(");
 174
 175       if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_ARRAY)
 176         f_type_print_varspec_suffix (TYPE_TARGET_TYPE (type), stream, 0, 0, 0,
 177                                      arrayprint_recurse_level);
 178
 179       lower_bound = f77_get_lowerbound (type);
 180       if (lower_bound != 1)     /* Not the default.  */
 181         fprintf_filtered (stream, "%d:", lower_bound);
 182
 183       /* Make sure that, if we have an assumed size array, we
 184          print out a warning and print the upperbound as '*'.  */
 185
 186       if (TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type))
 187         fprintf_filtered (stream, "*");
 188       else
 189         {
 190           upper_bound = f77_get_upperbound (type);
 191           fprintf_filtered (stream, "%d", upper_bound);
 192         }
 193
 194       if (TYPE_CODE (TYPE_TARGET_TYPE (type)) != TYPE_CODE_ARRAY)
 195         f_type_print_varspec_suffix (TYPE_TARGET_TYPE (type), stream, 0, 0, 0,
 196                                      arrayprint_recurse_level);
 197       if (arrayprint_recurse_level == 1)
 198         fprintf_filtered (stream, ")");
 199       else
 200         fprintf_filtered (stream, ",");
 201       arrayprint_recurse_level--;
 202       break;
 203
 204     case TYPE_CODE_PTR:
 205     case TYPE_CODE_REF:
 206       f_type_print_varspec_suffix (TYPE_TARGET_TYPE (type), stream, 0, 1, 0,
 207                                    arrayprint_recurse_level);
 208       fprintf_filtered (stream, ")");
 209       break;
 210
 211     case TYPE_CODE_FUNC:
 212       f_type_print_varspec_suffix (TYPE_TARGET_TYPE (type), stream, 0,
 213                                    passed_a_ptr, 0, arrayprint_recurse_level);
 214       if (passed_a_ptr)
 215         fprintf_filtered (stream, ")");
 216
 217       fprintf_filtered (stream, "()");
 218       break;
 219
 220     case TYPE_CODE_UNDEF:
 221     case TYPE_CODE_STRUCT:
 222     case TYPE_CODE_UNION:
 223     case TYPE_CODE_ENUM:
 224     case TYPE_CODE_INT:
 225     case TYPE_CODE_FLT:
 226     case TYPE_CODE_VOID:
 227     case TYPE_CODE_ERROR:
 228     case TYPE_CODE_CHAR:
 229     case TYPE_CODE_BOOL:
 230     case TYPE_CODE_SET:
 231     case TYPE_CODE_RANGE:
 232     case TYPE_CODE_STRING:
 233     case TYPE_CODE_BITSTRING:
 234     case TYPE_CODE_METHOD:
 235     case TYPE_CODE_COMPLEX:
 236     case TYPE_CODE_TYPEDEF:
 237       /* These types do not need a suffix.  They are listed so that
 238          gcc -Wall will report types that may not have been considered.  */
 239       break;
 240     }
 241 }
 242
 243 /* Print the name of the type (or the ultimate pointer target,
 244    function value or array element), or the description of a
 245    structure or union.
 246
 247    SHOW nonzero means don't print this type as just its name;
 248    show its real definition even if it has a name.
 249    SHOW zero means print just typename or struct tag if there is one
 250    SHOW negative means abbreviate structure elements.
 251    SHOW is decremented for printing of structure elements.
 252
 253    LEVEL is the depth to indent by.
 254    We increase it for some recursive calls.  */
 255
 256 void
 257 f_type_print_base (struct type *type, struct ui_file *stream, int show,
 258                    int level)
 259 {
 260   int upper_bound;
 261   int index;
 262
 263   QUIT;
 264
 265   wrap_here ("    ");
 266   if (type == NULL)
 267     {
 268       fputs_filtered ("<type unknown>", stream);
 269       return;
 270     }
 271
 272   /* When SHOW is zero or less, and there is a valid type name, then always
 273      just print the type name directly from the type.  */
 274
 275   if ((show <= 0) && (TYPE_NAME (type) != NULL))
 276     {
 277       fputs_filtered (TYPE_NAME (type), stream);
 278       return;
 279     }
 280
 281   if (TYPE_CODE (type) != TYPE_CODE_TYPEDEF)
 282     CHECK_TYPEDEF (type);
 283
 284   switch (TYPE_CODE (type))
 285     {
 286     case TYPE_CODE_TYPEDEF:
 287       f_type_print_base (TYPE_TARGET_TYPE (type), stream, 0, level);
 288       break;
 289
 290     case TYPE_CODE_ARRAY:
 291     case TYPE_CODE_FUNC:
 292       f_type_print_base (TYPE_TARGET_TYPE (type), stream, show, level);
 293       break;
 294
 295     case TYPE_CODE_PTR:
 296       fprintf_filtered (stream, "PTR TO -> ( ");
 297       f_type_print_base (TYPE_TARGET_TYPE (type), stream, 0, level);
 298       break;
 299
 300     case TYPE_CODE_REF:
 301       fprintf_filtered (stream, "REF TO -> ( ");
 302       f_type_print_base (TYPE_TARGET_TYPE (type), stream, 0, level);
 303       break;
 304
 305     case TYPE_CODE_VOID:
 306       fprintfi_filtered (level, stream, "VOID");
 307       break;
 308
 309     case TYPE_CODE_UNDEF:
 310       fprintfi_filtered (level, stream, "struct <unknown>");
 311       break;
 312
 313     case TYPE_CODE_ERROR:
 314       fprintfi_filtered (level, stream, "%s", TYPE_ERROR_NAME (type));
 315       break;
 316
 317     case TYPE_CODE_RANGE:
 318       /* This should not occur.  */
 319       fprintfi_filtered (level, stream, "<range type>");
 320       break;
 321
 322     case TYPE_CODE_CHAR:
 323     case TYPE_CODE_INT:
 324       /* There may be some character types that attempt to come
 325          through as TYPE_CODE_INT since dbxstclass.h is so
 326          C-oriented, we must change these to "character" from "char".  */
 327
 328       if (strcmp (TYPE_NAME (type), "char") == 0)
 329         fprintfi_filtered (level, stream, "character");
 330       else
 331         goto default_case;
 332       break;
 333
 334     case TYPE_CODE_STRING:
 335       /* Strings may have dynamic upperbounds (lengths) like arrays.  */
 336
 337       if (TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type))
 338         fprintfi_filtered (level, stream, "character*(*)");
 339       else
 340         {
 341           upper_bound = f77_get_upperbound (type);
 342           fprintf_filtered (stream, "character*%d", upper_bound);
 343         }
 344       break;
 345
 346     case TYPE_CODE_STRUCT:
 347     case TYPE_CODE_UNION:
 348       if (TYPE_CODE (type) == TYPE_CODE_UNION)
 349         fprintfi_filtered (level, stream, "Type, C_Union :: ");
 350       else
 351         fprintfi_filtered (level, stream, "Type ");
 352       fputs_filtered (TYPE_TAG_NAME (type), stream);
 353       fputs_filtered ("\n", stream);
 354       for (index = 0; index < TYPE_NFIELDS (type); index++)
 355         {
 356           f_type_print_base (TYPE_FIELD_TYPE (type, index), stream, show,
 357                              level + 4);
 358           fputs_filtered (" :: ", stream);
 359           fputs_filtered (TYPE_FIELD_NAME (type, index), stream);
 360           f_type_print_varspec_suffix (TYPE_FIELD_TYPE (type, index),
 361                                        stream, 0, 0, 0, 0);
 362           fputs_filtered ("\n", stream);
 363         }
 364       fprintfi_filtered (level, stream, "End Type ");
 365       fputs_filtered (TYPE_TAG_NAME (type), stream);
 366       break;
 367
 368     case TYPE_CODE_MODULE:
 369       fprintfi_filtered (level, stream, "module %s", TYPE_TAG_NAME (type));
 370       break;
 371
 372     default_case:
 373     default:
 374       /* Handle types not explicitly handled by the other cases,
 375          such as fundamental types.  For these, just print whatever
 376          the type name is, as recorded in the type itself.  If there
 377          is no type name, then complain.  */
 378       if (TYPE_NAME (type) != NULL)
 379         fprintfi_filtered (level, stream, "%s", TYPE_NAME (type));
 380       else
 381         error (_("Invalid type code (%d) in symbol table."), TYPE_CODE (type));
 382       break;
 383     }
 384 }