Subversion Repositories openrisc_2011-10-31

/* Support for printing Pascal types for GDB, the GNU debugger.

   Copyright (C) 2000, 2001, 2002, 2006, 2007, 2008, 2009, 2010

   Free Software Foundation, Inc.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 3 of the License, or

   (at your option) any later version.

   This program is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

/* This file is derived from p-typeprint.c */

#include "defs.h"

#include "gdb_obstack.h"

#include "bfd.h"                /* Binary File Description */

#include "symtab.h"

#include "gdbtypes.h"

#include "expression.h"

#include "value.h"

#include "gdbcore.h"

#include "target.h"

#include "language.h"

#include "p-lang.h"

#include "typeprint.h"

#include "gdb_string.h"

#include <errno.h>

#include <ctype.h>

static void pascal_type_print_varspec_suffix (struct type *, struct ui_file *, int, int, int);

static void pascal_type_print_derivation_info (struct ui_file *, struct type *);

void pascal_type_print_varspec_prefix (struct type *, struct ui_file *, int, int);

/* LEVEL is the depth to indent lines by.  */

void

pascal_print_type (struct type *type, const char *varstring,

                   struct ui_file *stream, int show, int level)

{

  enum type_code code;

  int demangled_args;

  code = TYPE_CODE (type);

  if (show > 0)

    CHECK_TYPEDEF (type);

  if ((code == TYPE_CODE_FUNC

       || code == TYPE_CODE_METHOD))

    {

      pascal_type_print_varspec_prefix (type, stream, show, 0);

    }

  /* first the name */

  fputs_filtered (varstring, stream);

  if ((varstring != NULL && *varstring != '\0')

      && !(code == TYPE_CODE_FUNC

           || code == TYPE_CODE_METHOD))

    {

      fputs_filtered (" : ", stream);

    }

  if (!(code == TYPE_CODE_FUNC

        || code == TYPE_CODE_METHOD))

    {

      pascal_type_print_varspec_prefix (type, stream, show, 0);

    }

  pascal_type_print_base (type, stream, show, level);

  /* For demangled function names, we have the arglist as part of the name,

     so don't print an additional pair of ()'s */

  demangled_args = varstring ? strchr (varstring, '(') != NULL : 0;

  pascal_type_print_varspec_suffix (type, stream, show, 0, demangled_args);

}

/* Print a typedef using Pascal syntax.  TYPE is the underlying type.

   NEW_SYMBOL is the symbol naming the type.  STREAM is the stream on

   which to print.  */

void

pascal_print_typedef (struct type *type, struct symbol *new_symbol,

                      struct ui_file *stream)

{

  CHECK_TYPEDEF (type);

  fprintf_filtered (stream, "type ");

  fprintf_filtered (stream, "%s = ", SYMBOL_PRINT_NAME (new_symbol));

  type_print (type, "", stream, 0);

  fprintf_filtered (stream, ";\n");

}

/* If TYPE is a derived type, then print out derivation information.

   Print only the actual base classes of this type, not the base classes

   of the base classes.  I.E.  for the derivation hierarchy:

   class A { int a; };

   class B : public A {int b; };

   class C : public B {int c; };

   Print the type of class C as:

   class C : public B {

   int c;

   }

   Not as the following (like gdb used to), which is not legal C++ syntax for

   derived types and may be confused with the multiple inheritance form:

   class C : public B : public A {

   int c;

   }

   In general, gdb should try to print the types as closely as possible to

   the form that they appear in the source code. */

static void

pascal_type_print_derivation_info (struct ui_file *stream, struct type *type)

{

  char *name;

  int i;

  for (i = 0; i < TYPE_N_BASECLASSES (type); i++)

    {

      fputs_filtered (i == 0 ? ": " : ", ", stream);

      fprintf_filtered (stream, "%s%s ",

                        BASETYPE_VIA_PUBLIC (type, i) ? "public" : "private",

                        BASETYPE_VIA_VIRTUAL (type, i) ? " virtual" : "");

      name = type_name_no_tag (TYPE_BASECLASS (type, i));

      fprintf_filtered (stream, "%s", name ? name : "(null)");

    }

  if (i > 0)

    {

      fputs_filtered (" ", stream);

    }

}

/* Print the Pascal method arguments ARGS to the file STREAM.  */

void

pascal_type_print_method_args (char *physname, char *methodname,

                               struct ui_file *stream)

{

  int is_constructor = (strncmp (physname, "__ct__", 6) == 0);

  int is_destructor = (strncmp (physname, "__dt__", 6) == 0);

  if (is_constructor || is_destructor)

    {

      physname += 6;

    }

  fputs_filtered (methodname, stream);

  if (physname && (*physname != 0))

    {

      int i = 0;

      int len = 0;

      char storec;

      char *argname;

      fputs_filtered (" (", stream);

      /* we must demangle this */

      while (isdigit (physname[0]))

        {

          while (isdigit (physname[len]))

            {

              len++;

            }

          i = strtol (physname, &argname, 0);

          physname += len;

          storec = physname[i];

          physname[i] = 0;

          fputs_filtered (physname, stream);

          physname[i] = storec;

          physname += i;

          if (physname[0] != 0)

            {

              fputs_filtered (", ", stream);

            }

        }

      fputs_filtered (")", stream);

    }

}

/* Print any asterisks or open-parentheses needed before the

   variable name (to describe its type).

   On outermost call, pass 0 for PASSED_A_PTR.

   On outermost call, SHOW > 0 means should ignore

   any typename for TYPE and show its details.

   SHOW is always zero on recursive calls.  */

void

pascal_type_print_varspec_prefix (struct type *type, struct ui_file *stream,

                                  int show, int passed_a_ptr)

{

  if (type == 0)

    return;

  if (TYPE_NAME (type) && show <= 0)

    return;

  QUIT;

  switch (TYPE_CODE (type))

    {

    case TYPE_CODE_PTR:

      fprintf_filtered (stream, "^");

      pascal_type_print_varspec_prefix (TYPE_TARGET_TYPE (type), stream, 0, 1);

      break;                    /* pointer should be handled normally in pascal */

    case TYPE_CODE_METHOD:

      if (passed_a_ptr)

        fprintf_filtered (stream, "(");

      if (TYPE_CODE (TYPE_TARGET_TYPE (type)) != TYPE_CODE_VOID)

        {

          fprintf_filtered (stream, "function  ");

        }

      else

        {

          fprintf_filtered (stream, "procedure ");

        }

      if (passed_a_ptr)

        {

          fprintf_filtered (stream, " ");

          pascal_type_print_base (TYPE_DOMAIN_TYPE (type), stream, 0, passed_a_ptr);

          fprintf_filtered (stream, "::");

        }

      break;

    case TYPE_CODE_REF:

      pascal_type_print_varspec_prefix (TYPE_TARGET_TYPE (type), stream, 0, 1);

      fprintf_filtered (stream, "&");

      break;

    case TYPE_CODE_FUNC:

      if (passed_a_ptr)

        fprintf_filtered (stream, "(");

      if (TYPE_CODE (TYPE_TARGET_TYPE (type)) != TYPE_CODE_VOID)

        {

          fprintf_filtered (stream, "function  ");

        }

      else

        {

          fprintf_filtered (stream, "procedure ");

        }

      break;

    case TYPE_CODE_ARRAY:

      if (passed_a_ptr)

        fprintf_filtered (stream, "(");

      fprintf_filtered (stream, "array ");

      if (TYPE_LENGTH (TYPE_TARGET_TYPE (type)) > 0

        && !TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type))

        fprintf_filtered (stream, "[%s..%s] ",

                          plongest (TYPE_ARRAY_LOWER_BOUND_VALUE (type)),

                          plongest (TYPE_ARRAY_UPPER_BOUND_VALUE (type)));

      fprintf_filtered (stream, "of ");

      break;

    case TYPE_CODE_UNDEF:

    case TYPE_CODE_STRUCT:

    case TYPE_CODE_UNION:

    case TYPE_CODE_ENUM:

    case TYPE_CODE_INT:

    case TYPE_CODE_FLT:

    case TYPE_CODE_VOID:

    case TYPE_CODE_ERROR:

    case TYPE_CODE_CHAR:

    case TYPE_CODE_BOOL:

    case TYPE_CODE_SET:

    case TYPE_CODE_RANGE:

    case TYPE_CODE_STRING:

    case TYPE_CODE_BITSTRING:

    case TYPE_CODE_COMPLEX:

    case TYPE_CODE_TYPEDEF:

      /* These types need no prefix.  They are listed here so that

         gcc -Wall will reveal any types that haven't been handled.  */

      break;

    default:

      error (_("type not handled in pascal_type_print_varspec_prefix()"));

      break;

    }

}

static void

pascal_print_func_args (struct type *type, struct ui_file *stream)

{

  int i, len = TYPE_NFIELDS (type);

  if (len)

    {

      fprintf_filtered (stream, "(");

    }

  for (i = 0; i < len; i++)

    {

      if (i > 0)

        {

          fputs_filtered (", ", stream);

          wrap_here ("    ");

        }

      /*  can we find if it is a var parameter ??

         if ( TYPE_FIELD(type, i) == )

         {

         fprintf_filtered (stream, "var ");

         } */

      pascal_print_type (TYPE_FIELD_TYPE (type, i), ""  /* TYPE_FIELD_NAME seems invalid ! */

                         ,stream, -1, 0);

    }

  if (len)

    {

      fprintf_filtered (stream, ")");

    }

}

/* Print any array sizes, function arguments or close parentheses

   needed after the variable name (to describe its type).

   Args work like pascal_type_print_varspec_prefix.  */

static void

pascal_type_print_varspec_suffix (struct type *type, struct ui_file *stream,

                                  int show, int passed_a_ptr,

                                  int demangled_args)

{

  if (type == 0)

    return;

  if (TYPE_NAME (type) && show <= 0)

    return;

  QUIT;

  switch (TYPE_CODE (type))

    {

    case TYPE_CODE_ARRAY:

      if (passed_a_ptr)

        fprintf_filtered (stream, ")");

      break;

    case TYPE_CODE_METHOD:

      if (passed_a_ptr)

        fprintf_filtered (stream, ")");

      pascal_type_print_method_args ("",

                                     "",

                                     stream);

      if (TYPE_CODE (TYPE_TARGET_TYPE (type)) != TYPE_CODE_VOID)

        {

          fprintf_filtered (stream, " : ");

          pascal_type_print_varspec_prefix (TYPE_TARGET_TYPE (type), stream, 0, 0);

          pascal_type_print_base (TYPE_TARGET_TYPE (type), stream, show, 0);

          pascal_type_print_varspec_suffix (TYPE_TARGET_TYPE (type), stream, 0,

                                            passed_a_ptr, 0);

        }

      break;

    case TYPE_CODE_PTR:

    case TYPE_CODE_REF:

      pascal_type_print_varspec_suffix (TYPE_TARGET_TYPE (type), stream, 0, 1, 0);

      break;

    case TYPE_CODE_FUNC:

      if (passed_a_ptr)

        fprintf_filtered (stream, ")");

      if (!demangled_args)

        pascal_print_func_args (type, stream);

      if (TYPE_CODE (TYPE_TARGET_TYPE (type)) != TYPE_CODE_VOID)

        {

          fprintf_filtered (stream, " : ");

          pascal_type_print_varspec_prefix (TYPE_TARGET_TYPE (type), stream, 0, 0);

          pascal_type_print_base (TYPE_TARGET_TYPE (type), stream, show, 0);

          pascal_type_print_varspec_suffix (TYPE_TARGET_TYPE (type), stream, 0,

                                            passed_a_ptr, 0);

        }

      break;

    case TYPE_CODE_UNDEF:

    case TYPE_CODE_STRUCT:

    case TYPE_CODE_UNION:

    case TYPE_CODE_ENUM:

    case TYPE_CODE_INT:

    case TYPE_CODE_FLT:

    case TYPE_CODE_VOID:

    case TYPE_CODE_ERROR:

    case TYPE_CODE_CHAR:

    case TYPE_CODE_BOOL:

    case TYPE_CODE_SET:

    case TYPE_CODE_RANGE:

    case TYPE_CODE_STRING:

    case TYPE_CODE_BITSTRING:

    case TYPE_CODE_COMPLEX:

    case TYPE_CODE_TYPEDEF:

      /* These types do not need a suffix.  They are listed so that

         gcc -Wall will report types that may not have been considered.  */

      break;

    default:

      error (_("type not handled in pascal_type_print_varspec_suffix()"));

      break;

    }

}

/* Print the name of the type (or the ultimate pointer target,

   function value or array element), or the description of a

   structure or union.

   SHOW positive means print details about the type (e.g. enum values),

   and print structure elements passing SHOW - 1 for show.

   SHOW negative means just print the type name or struct tag if there is one.

   If there is no name, print something sensible but concise like

   "struct {...}".

   SHOW zero means just print the type name or struct tag if there is one.

   If there is no name, print something sensible but not as concise like

   "struct {int x; int y;}".

   LEVEL is the number of spaces to indent by.

   We increase it for some recursive calls.  */

void

pascal_type_print_base (struct type *type, struct ui_file *stream, int show,

                        int level)

{

  int i;

  int len;

  int lastval;

  enum

    {

      s_none, s_public, s_private, s_protected

    }

  section_type;

  QUIT;

  wrap_here ("    ");

  if (type == NULL)

    {

      fputs_filtered ("<type unknown>", stream);

      return;

    }

  /* void pointer */

  if ((TYPE_CODE (type) == TYPE_CODE_PTR) && (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_VOID))

    {

      fputs_filtered (TYPE_NAME (type) ? TYPE_NAME (type) : "pointer",

                      stream);

      return;

    }

  /* When SHOW is zero or less, and there is a valid type name, then always

     just print the type name directly from the type.  */

  if (show <= 0

      && TYPE_NAME (type) != NULL)

    {

      fputs_filtered (TYPE_NAME (type), stream);

      return;

    }

  CHECK_TYPEDEF (type);

  switch (TYPE_CODE (type))

    {

    case TYPE_CODE_TYPEDEF:

    case TYPE_CODE_PTR:

    case TYPE_CODE_REF:

      /* case TYPE_CODE_FUNC:

         case TYPE_CODE_METHOD: */

      pascal_type_print_base (TYPE_TARGET_TYPE (type), stream, show, level);

      break;

    case TYPE_CODE_ARRAY:

      /* pascal_type_print_varspec_prefix (TYPE_TARGET_TYPE (type), stream, 0, 0);

         pascal_type_print_base (TYPE_TARGET_TYPE (type), stream, show, level);

         pascal_type_print_varspec_suffix (TYPE_TARGET_TYPE (type), stream, 0, 0, 0); */

      pascal_print_type (TYPE_TARGET_TYPE (type), NULL, stream, 0, 0);

      break;

    case TYPE_CODE_FUNC:

    case TYPE_CODE_METHOD:

      /*

         pascal_type_print_base (TYPE_TARGET_TYPE (type), stream, show, level);

         only after args !! */

      break;

    case TYPE_CODE_STRUCT:

      if (TYPE_TAG_NAME (type) != NULL)

        {

          fputs_filtered (TYPE_TAG_NAME (type), stream);

          fputs_filtered (" = ", stream);

        }

      if (HAVE_CPLUS_STRUCT (type))

        {

          fprintf_filtered (stream, "class ");

        }

      else

        {

          fprintf_filtered (stream, "record ");

        }

      goto struct_union;

    case TYPE_CODE_UNION:

      if (TYPE_TAG_NAME (type) != NULL)

        {

          fputs_filtered (TYPE_TAG_NAME (type), stream);

          fputs_filtered (" = ", stream);

        }

      fprintf_filtered (stream, "case <?> of ");

    struct_union:

      wrap_here ("    ");

      if (show < 0)

        {

          /* If we just printed a tag name, no need to print anything else.  */

          if (TYPE_TAG_NAME (type) == NULL)

            fprintf_filtered (stream, "{...}");

        }

      else if (show > 0 || TYPE_TAG_NAME (type) == NULL)

        {

          pascal_type_print_derivation_info (stream, type);

          fprintf_filtered (stream, "\n");

          if ((TYPE_NFIELDS (type) == 0) && (TYPE_NFN_FIELDS (type) == 0))

            {

              if (TYPE_STUB (type))

                fprintfi_filtered (level + 4, stream, "<incomplete type>\n");

              else

                fprintfi_filtered (level + 4, stream, "<no data fields>\n");

            }

          /* Start off with no specific section type, so we can print

             one for the first field we find, and use that section type

             thereafter until we find another type. */

          section_type = s_none;

          /* If there is a base class for this type,

             do not print the field that it occupies.  */

          len = TYPE_NFIELDS (type);

          for (i = TYPE_N_BASECLASSES (type); i < len; i++)

            {

              QUIT;

              /* Don't print out virtual function table.  */

              if ((strncmp (TYPE_FIELD_NAME (type, i), "_vptr", 5) == 0)

                  && is_cplus_marker ((TYPE_FIELD_NAME (type, i))[5]))

                continue;

              /* If this is a pascal object or class we can print the

                 various section labels. */

              if (HAVE_CPLUS_STRUCT (type))

                {

                  if (TYPE_FIELD_PROTECTED (type, i))

                    {

                      if (section_type != s_protected)

                        {

                          section_type = s_protected;

                          fprintfi_filtered (level + 2, stream,

                                             "protected\n");

                        }

                    }

                  else if (TYPE_FIELD_PRIVATE (type, i))

                    {

                      if (section_type != s_private)

                        {

                          section_type = s_private;

                          fprintfi_filtered (level + 2, stream, "private\n");

                        }

                    }

                  else

                    {

                      if (section_type != s_public)

                        {

                          section_type = s_public;

                          fprintfi_filtered (level + 2, stream, "public\n");

                        }

                    }

                }

              print_spaces_filtered (level + 4, stream);

              if (field_is_static (&TYPE_FIELD (type, i)))

                fprintf_filtered (stream, "static ");

              pascal_print_type (TYPE_FIELD_TYPE (type, i),

                                 TYPE_FIELD_NAME (type, i),

                                 stream, show - 1, level + 4);

              if (!field_is_static (&TYPE_FIELD (type, i))

                  && TYPE_FIELD_PACKED (type, i))

                {

                  /* It is a bitfield.  This code does not attempt

                     to look at the bitpos and reconstruct filler,

                     unnamed fields.  This would lead to misleading

                     results if the compiler does not put out fields

                     for such things (I don't know what it does).  */

                  fprintf_filtered (stream, " : %d",

                                    TYPE_FIELD_BITSIZE (type, i));

                }

              fprintf_filtered (stream, ";\n");

            }

          /* If there are both fields and methods, put a space between. */

          len = TYPE_NFN_FIELDS (type);

          if (len && section_type != s_none)

            fprintf_filtered (stream, "\n");

          /* Pbject pascal: print out the methods */

          for (i = 0; i < len; i++)

            {

              struct fn_field *f = TYPE_FN_FIELDLIST1 (type, i);

              int j, len2 = TYPE_FN_FIELDLIST_LENGTH (type, i);

              char *method_name = TYPE_FN_FIELDLIST_NAME (type, i);

              /* this is GNU C++ specific

                 how can we know constructor/destructor?

                 It might work for GNU pascal */

              for (j = 0; j < len2; j++)

                {

                  char *physname = TYPE_FN_FIELD_PHYSNAME (f, j);

                  int is_constructor = (strncmp (physname, "__ct__", 6) == 0);

                  int is_destructor = (strncmp (physname, "__dt__", 6) == 0);

                  QUIT;

                  if (TYPE_FN_FIELD_PROTECTED (f, j))

                    {

                      if (section_type != s_protected)

                        {

                          section_type = s_protected;

                          fprintfi_filtered (level + 2, stream,

                                             "protected\n");

                        }

                    }

                  else if (TYPE_FN_FIELD_PRIVATE (f, j))

                    {

                      if (section_type != s_private)

                        {

                          section_type = s_private;

                          fprintfi_filtered (level + 2, stream, "private\n");

                        }

                    }

                  else

                    {

                      if (section_type != s_public)

                        {

                          section_type = s_public;

                          fprintfi_filtered (level + 2, stream, "public\n");

                        }

                    }

                  print_spaces_filtered (level + 4, stream);

                  if (TYPE_FN_FIELD_STATIC_P (f, j))

                    fprintf_filtered (stream, "static ");

                  if (TYPE_TARGET_TYPE (TYPE_FN_FIELD_TYPE (f, j)) == 0)

                    {

                      /* Keep GDB from crashing here.  */

                      fprintf_filtered (stream, "<undefined type> %s;\n",

                                        TYPE_FN_FIELD_PHYSNAME (f, j));

                      break;

                    }

                  if (is_constructor)

                    {

                      fprintf_filtered (stream, "constructor ");

                    }

                  else if (is_destructor)

                    {

                      fprintf_filtered (stream, "destructor  ");

                    }

                  else if (TYPE_TARGET_TYPE (TYPE_FN_FIELD_TYPE (f, j)) != 0

                           && TYPE_CODE (TYPE_TARGET_TYPE (

                                TYPE_FN_FIELD_TYPE (f, j))) != TYPE_CODE_VOID)