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