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/* Support for printing Java values for GDB, the GNU debugger.

   Copyright 1997, 1998, 1999, 2000 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 2 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, write to the Free Software

   Foundation, Inc., 59 Temple Place - Suite 330,

   Boston, MA 02111-1307, USA.  */

#include "defs.h"

#include "symtab.h"

#include "gdbtypes.h"

#include "gdbcore.h"

#include "expression.h"

#include "value.h"

#include "demangle.h"

#include "valprint.h"

#include "language.h"

#include "jv-lang.h"

#include "c-lang.h"

#include "annotate.h"

#include "gdb_string.h"

/* Local functions */

static void java_print_value_fields (struct type * type, char *valaddr,

                                     CORE_ADDR address,

                                     struct ui_file *stream, int format,

                                     int recurse,

                                     enum val_prettyprint pretty);

int

java_value_print (struct value *val, struct ui_file *stream, int format,

                  enum val_prettyprint pretty)

{

  struct type *type;

  CORE_ADDR address;

  int i;

  char *name;

  type = VALUE_TYPE (val);

  address = VALUE_ADDRESS (val) + VALUE_OFFSET (val);

  if (is_object_type (type))

    {

      CORE_ADDR obj_addr;

      /* Get the run-time type, and cast the object into that */

      obj_addr = unpack_pointer (type, VALUE_CONTENTS (val));

      if (obj_addr != 0)

        {

          type = type_from_class (java_class_from_object (val));

          type = lookup_pointer_type (type);

          val = value_at (type, address, NULL);

        }

    }

  if (TYPE_CODE (type) == TYPE_CODE_PTR && !value_logical_not (val))

    type_print (TYPE_TARGET_TYPE (type), "", stream, -1);

  name = TYPE_TAG_NAME (type);

  if (TYPE_CODE (type) == TYPE_CODE_STRUCT && name != NULL

      && (i = strlen (name), name[i - 1] == ']'))

    {

      char buf4[4];

      long length;

      unsigned int things_printed = 0;

      int reps;

      struct type *el_type = java_primitive_type_from_name (name, i - 2);

      i = 0;

      read_memory (address + JAVA_OBJECT_SIZE, buf4, 4);

      length = (long) extract_signed_integer (buf4, 4);

      fprintf_filtered (stream, "{length: %ld", length);

      if (el_type == NULL)

        {

          CORE_ADDR element;

          CORE_ADDR next_element = -1; /* dummy initial value */

          address += JAVA_OBJECT_SIZE + 4;      /* Skip object header and length. */

          while (i < length && things_printed < print_max)

            {

              char *buf;

              buf = alloca (TARGET_PTR_BIT / HOST_CHAR_BIT);

              fputs_filtered (", ", stream);

              wrap_here (n_spaces (2));

              if (i > 0)

                element = next_element;

              else

                {

                  read_memory (address, buf, sizeof (buf));

                  address += TARGET_PTR_BIT / HOST_CHAR_BIT;

                  element = extract_address (buf, sizeof (buf));

                }

              for (reps = 1; i + reps < length; reps++)

                {

                  read_memory (address, buf, sizeof (buf));

                  address += TARGET_PTR_BIT / HOST_CHAR_BIT;

                  next_element = extract_address (buf, sizeof (buf));

                  if (next_element != element)

                    break;

                }

              if (reps == 1)

                fprintf_filtered (stream, "%d: ", i);

              else

                fprintf_filtered (stream, "%d..%d: ", i, i + reps - 1);

              if (element == 0)

                fprintf_filtered (stream, "null");

              else

                fprintf_filtered (stream, "@%s", paddr_nz (element));

              things_printed++;

              i += reps;

            }

        }

      else

        {

          struct value *v = allocate_value (el_type);

          struct value *next_v = allocate_value (el_type);

          VALUE_ADDRESS (v) = address + JAVA_OBJECT_SIZE + 4;

          VALUE_ADDRESS (next_v) = VALUE_ADDRESS (v);

          while (i < length && things_printed < print_max)

            {

              fputs_filtered (", ", stream);

              wrap_here (n_spaces (2));

              if (i > 0)

                {

                  struct value *tmp;

                  tmp = next_v;

                  next_v = v;

                  v = tmp;

                }

              else

                {

                  VALUE_LAZY (v) = 1;

                  VALUE_OFFSET (v) = 0;

                }

              VALUE_OFFSET (next_v) = VALUE_OFFSET (v);

              for (reps = 1; i + reps < length; reps++)

                {

                  VALUE_LAZY (next_v) = 1;

                  VALUE_OFFSET (next_v) += TYPE_LENGTH (el_type);

                  if (memcmp (VALUE_CONTENTS (v), VALUE_CONTENTS (next_v),

                              TYPE_LENGTH (el_type)) != 0)

                    break;

                }

              if (reps == 1)

                fprintf_filtered (stream, "%d: ", i);

              else

                fprintf_filtered (stream, "%d..%d: ", i, i + reps - 1);

              val_print (VALUE_TYPE (v), VALUE_CONTENTS (v), 0, 0,

                         stream, format, 2, 1, pretty);

              things_printed++;

              i += reps;

            }

        }

      if (i < length)

        fprintf_filtered (stream, "...");

      fprintf_filtered (stream, "}");

      return 0;

    }

  /* If it's type String, print it */

  if (TYPE_CODE (type) == TYPE_CODE_PTR

      && TYPE_TARGET_TYPE (type)

      && TYPE_NAME (TYPE_TARGET_TYPE (type))

      && strcmp (TYPE_NAME (TYPE_TARGET_TYPE (type)), "java.lang.String") == 0

      && (format == 0 || format == 's')

      && address != 0

      && value_as_address (val) != 0)

    {

      struct value *data_val;

      CORE_ADDR data;

      struct value *boffset_val;

      unsigned long boffset;

      struct value *count_val;

      unsigned long count;

      struct value *mark;

      mark = value_mark ();     /* Remember start of new values */

      data_val = value_struct_elt (&val, NULL, "data", NULL, NULL);

      data = value_as_address (data_val);

      boffset_val = value_struct_elt (&val, NULL, "boffset", NULL, NULL);

      boffset = value_as_address (boffset_val);

      count_val = value_struct_elt (&val, NULL, "count", NULL, NULL);

      count = value_as_address (count_val);

      value_free_to_mark (mark);        /* Release unnecessary values */

      val_print_string (data + boffset, count, 2, stream);

      return 0;

    }

  return (val_print (type, VALUE_CONTENTS (val), 0, address,

                     stream, format, 1, 0, pretty));

}

/* TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and PRETTY have the

   same meanings as in cp_print_value and c_val_print.

   DONT_PRINT is an array of baseclass types that we

   should not print, or zero if called from top level.  */

static void

java_print_value_fields (struct type *type, char *valaddr, CORE_ADDR address,

                         struct ui_file *stream, int format, int recurse,

                         enum val_prettyprint pretty)

{

  int i, len, n_baseclasses;

  CHECK_TYPEDEF (type);

  fprintf_filtered (stream, "{");

  len = TYPE_NFIELDS (type);

  n_baseclasses = TYPE_N_BASECLASSES (type);

  if (n_baseclasses > 0)

    {

      int i, n_baseclasses = TYPE_N_BASECLASSES (type);

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

        {

          int boffset;

          struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i));

          char *basename = TYPE_NAME (baseclass);

          char *base_valaddr;

          if (BASETYPE_VIA_VIRTUAL (type, i))

            continue;

          if (basename != NULL && strcmp (basename, "java.lang.Object") == 0)

            continue;

          boffset = 0;

          if (pretty)

            {

              fprintf_filtered (stream, "\n");

              print_spaces_filtered (2 * (recurse + 1), stream);

            }

          fputs_filtered ("<", stream);

          /* Not sure what the best notation is in the case where there is no

             baseclass name.  */

          fputs_filtered (basename ? basename : "", stream);

          fputs_filtered ("> = ", stream);

          base_valaddr = valaddr;

          java_print_value_fields (baseclass, base_valaddr, address + boffset,

                                   stream, format, recurse + 1, pretty);

          fputs_filtered (", ", stream);

        flush_it:

          ;

        }

    }

  if (!len && n_baseclasses == 1)

    fprintf_filtered (stream, "<No data fields>");

  else

    {

      extern int inspect_it;

      int fields_seen = 0;

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

        {

          /* If requested, skip printing of static fields.  */

          if (TYPE_FIELD_STATIC (type, i))

            {

              char *name = TYPE_FIELD_NAME (type, i);

              if (!static_field_print)

                continue;

              if (name != NULL && strcmp (name, "class") == 0)

                continue;

            }

          if (fields_seen)

            fprintf_filtered (stream, ", ");

          else if (n_baseclasses > 0)

            {

              if (pretty)

                {

                  fprintf_filtered (stream, "\n");

                  print_spaces_filtered (2 + 2 * recurse, stream);

                  fputs_filtered ("members of ", stream);

                  fputs_filtered (type_name_no_tag (type), stream);

                  fputs_filtered (": ", stream);

                }

            }

          fields_seen = 1;

          if (pretty)

            {

              fprintf_filtered (stream, "\n");

              print_spaces_filtered (2 + 2 * recurse, stream);

            }

          else

            {

              wrap_here (n_spaces (2 + 2 * recurse));

            }

          if (inspect_it)

            {

              if (TYPE_CODE (TYPE_FIELD_TYPE (type, i)) == TYPE_CODE_PTR)

                fputs_filtered ("\"( ptr \"", stream);

              else

                fputs_filtered ("\"( nodef \"", stream);

              if (TYPE_FIELD_STATIC (type, i))

                fputs_filtered ("static ", stream);

              fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),

                                       language_cplus,

                                       DMGL_PARAMS | DMGL_ANSI);

              fputs_filtered ("\" \"", stream);

              fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),

                                       language_cplus,

                                       DMGL_PARAMS | DMGL_ANSI);

              fputs_filtered ("\") \"", stream);

            }

          else

            {

              annotate_field_begin (TYPE_FIELD_TYPE (type, i));

              if (TYPE_FIELD_STATIC (type, i))

                fputs_filtered ("static ", stream);

              fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),

                                       language_cplus,

                                       DMGL_PARAMS | DMGL_ANSI);

              annotate_field_name_end ();

              fputs_filtered (": ", stream);

              annotate_field_value ();

            }

          if (!TYPE_FIELD_STATIC (type, i) && TYPE_FIELD_PACKED (type, i))

            {

              struct value *v;

              /* Bitfields require special handling, especially due to byte

                 order problems.  */

              if (TYPE_FIELD_IGNORE (type, i))

                {

                  fputs_filtered ("<optimized out or zero length>", stream);

                }

              else

                {

                  v = value_from_longest (TYPE_FIELD_TYPE (type, i),

                                   unpack_field_as_long (type, valaddr, i));

                  val_print (TYPE_FIELD_TYPE (type, i), VALUE_CONTENTS (v), 0,

                             0, stream, format, 0, recurse + 1, pretty);

                }

            }

          else

            {

              if (TYPE_FIELD_IGNORE (type, i))

                {

                  fputs_filtered ("<optimized out or zero length>", stream);

                }

              else if (TYPE_FIELD_STATIC (type, i))

                {

                  struct value *v = value_static_field (type, i);

                  if (v == NULL)

                    fputs_filtered ("<optimized out>", stream);

                  else

                    {

                      struct type *t = check_typedef (VALUE_TYPE (v));

                      if (TYPE_CODE (t) == TYPE_CODE_STRUCT)

                        v = value_addr (v);

                      val_print (VALUE_TYPE (v),

                                 VALUE_CONTENTS (v), 0, VALUE_ADDRESS (v),

                                 stream, format, 0, recurse + 1, pretty);

                    }

                }

              else if (TYPE_FIELD_TYPE (type, i) == NULL)

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

              else

                {

                  val_print (TYPE_FIELD_TYPE (type, i),

                             valaddr + TYPE_FIELD_BITPOS (type, i) / 8, 0,

                             address + TYPE_FIELD_BITPOS (type, i) / 8,

                             stream, format, 0, recurse + 1, pretty);

                }

            }

          annotate_field_end ();

        }

      if (pretty)

        {

          fprintf_filtered (stream, "\n");

          print_spaces_filtered (2 * recurse, stream);

        }

    }

  fprintf_filtered (stream, "}");

}

/* Print data of type TYPE located at VALADDR (within GDB), which came from

   the inferior at address ADDRESS, onto stdio stream STREAM according to

   FORMAT (a letter or 0 for natural format).  The data at VALADDR is in

   target byte order.

   If the data are a string pointer, returns the number of string characters

   printed.

   If DEREF_REF is nonzero, then dereference references, otherwise just print

   them like pointers.

   The PRETTY parameter controls prettyprinting.  */

int

java_val_print (struct type *type, char *valaddr, int embedded_offset,

                CORE_ADDR address, struct ui_file *stream, int format,

                int deref_ref, int recurse, enum val_prettyprint pretty)

{

  register unsigned int i = 0;   /* Number of characters printed */

  struct type *target_type;

  CORE_ADDR addr;

  CHECK_TYPEDEF (type);

  switch (TYPE_CODE (type))

    {

    case TYPE_CODE_PTR:

      if (format && format != 's')

        {

          print_scalar_formatted (valaddr, type, format, 0, stream);

          break;

        }

#if 0

      if (vtblprint && cp_is_vtbl_ptr_type (type))

        {

          /* Print the unmangled name if desired.  */

          /* Print vtable entry - we only get here if we ARE using

             -fvtable_thunks.  (Otherwise, look under TYPE_CODE_STRUCT.) */

          print_address_demangle (extract_address (valaddr, TYPE_LENGTH (type)),

                                  stream, demangle);

          break;

        }

#endif

      addr = unpack_pointer (type, valaddr);

      if (addr == 0)

        {

          fputs_filtered ("null", stream);

          return i;

        }

      target_type = check_typedef (TYPE_TARGET_TYPE (type));

      if (TYPE_CODE (target_type) == TYPE_CODE_FUNC)

        {

          /* Try to print what function it points to.  */

          print_address_demangle (addr, stream, demangle);

          /* Return value is irrelevant except for string pointers.  */

          return (0);

        }

      if (addressprint && format != 's')

        {

          fputs_filtered ("@", stream);

          print_longest (stream, 'x', 0, (ULONGEST) addr);

        }

      return i;

    case TYPE_CODE_CHAR:

    case TYPE_CODE_INT:

      /* Can't just call c_val_print because that prints bytes as C

         chars.  */

      format = format ? format : output_format;

      if (format)

        print_scalar_formatted (valaddr, type, format, 0, stream);

      else if (TYPE_CODE (type) == TYPE_CODE_CHAR

               || (TYPE_CODE (type) == TYPE_CODE_INT

                   && TYPE_LENGTH (type) == 2

                   && strcmp (TYPE_NAME (type), "char") == 0))

        LA_PRINT_CHAR ((int) unpack_long (type, valaddr), stream);

      else

        val_print_type_code_int (type, valaddr, stream);

      break;

    case TYPE_CODE_STRUCT:

      java_print_value_fields (type, valaddr, address, stream, format,

                               recurse, pretty);

      break;

    default:

      return c_val_print (type, valaddr, embedded_offset, address, stream,

                          format, deref_ref, recurse, pretty);

    }

  return 0;

}