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/* Support for printing C and C++ types for GDB, the GNU debugger.

   Copyright (C) 1986, 1988, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1998,

   1999, 2000, 2001, 2002, 2003, 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/>.  */

#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 "demangle.h"

#include "c-lang.h"

#include "typeprint.h"

#include "cp-abi.h"

#include "jv-lang.h"

#include "gdb_string.h"

#include <errno.h>

static void cp_type_print_method_args (struct type *mtype, char *prefix,

                                       char *varstring, int staticp,

                                       struct ui_file *stream);

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

static void c_type_print_varspec_prefix (struct type *, struct ui_file *, int,

                                         int, int);

/* Print "const", "volatile", or address space modifiers. */

static void c_type_print_modifier (struct type *, struct ui_file *,

                                   int, int);

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

void

c_print_type (struct type *type, const char *varstring, struct ui_file *stream,

              int show, int level)

{

  enum type_code code;

  int demangled_args;

  int need_post_space;

  if (show > 0)

    CHECK_TYPEDEF (type);

  c_type_print_base (type, stream, show, level);

  code = TYPE_CODE (type);

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

  /* Need a space if going to print stars or brackets;

     but not if we will print just a type name.  */

      || ((show > 0 || TYPE_NAME (type) == 0)

          && (code == TYPE_CODE_PTR || code == TYPE_CODE_FUNC

              || code == TYPE_CODE_METHOD

              || code == TYPE_CODE_ARRAY

              || code == TYPE_CODE_MEMBERPTR

              || code == TYPE_CODE_METHODPTR

              || code == TYPE_CODE_REF)))

    fputs_filtered (" ", stream);

  need_post_space = (varstring != NULL && strcmp (varstring, "") != 0);

  c_type_print_varspec_prefix (type, stream, show, 0, need_post_space);

  if (varstring != NULL)

    {

      fputs_filtered (varstring, stream);

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

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

      demangled_args = strchr (varstring, '(') != NULL;

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

    }

}

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

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

   which to print.  */

void

c_print_typedef (struct type *type, struct symbol *new_symbol,

                 struct ui_file *stream)

{

  CHECK_TYPEDEF (type);

  fprintf_filtered (stream, "typedef ");

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

  if (TYPE_NAME ((SYMBOL_TYPE (new_symbol))) == 0

      || strcmp (TYPE_NAME ((SYMBOL_TYPE (new_symbol))),

                 SYMBOL_LINKAGE_NAME (new_symbol)) != 0

      || TYPE_CODE (SYMBOL_TYPE (new_symbol)) == TYPE_CODE_TYPEDEF)

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

  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.

   Note that in case of protected derivation gcc will not say 'protected'

   but 'private'. The HP's aCC compiler emits specific information for

   derivation via protected inheritance, so gdb can print it out */

static void

cp_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"

               : (TYPE_FIELD_PROTECTED (type, i) ? "protected" : "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 C++ method arguments ARGS to the file STREAM.  */

static void

cp_type_print_method_args (struct type *mtype, char *prefix, char *varstring,

                           int staticp, struct ui_file *stream)

{

  struct field *args = TYPE_FIELDS (mtype);

  int nargs = TYPE_NFIELDS (mtype);

  int varargs = TYPE_VARARGS (mtype);

  int i;

  fprintf_symbol_filtered (stream, prefix, language_cplus, DMGL_ANSI);

  fprintf_symbol_filtered (stream, varstring, language_cplus, DMGL_ANSI);

  fputs_filtered ("(", stream);

  /* Skip the class variable.  */

  i = staticp ? 0 : 1;

  if (nargs > i)

    {

      while (i < nargs)

        {

          type_print (args[i++].type, "", stream, 0);

          if (i == nargs && varargs)

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

          else if (i < nargs)

            fprintf_filtered (stream, ", ");

        }

    }

  else if (varargs)

    fprintf_filtered (stream, "...");

  else if (current_language->la_language == language_cplus)

    fprintf_filtered (stream, "void");

  fprintf_filtered (stream, ")");

  /* For non-static methods, read qualifiers from the type of

     THIS.  */

  if (!staticp)

    {

      struct type *domain;

      gdb_assert (nargs > 0);

      gdb_assert (TYPE_CODE (args[0].type) == TYPE_CODE_PTR);

      domain = TYPE_TARGET_TYPE (args[0].type);

      if (TYPE_CONST (domain))

        fprintf_filtered (stream, " const");

      if (TYPE_VOLATILE (domain))

        fprintf_filtered (stream, " volatile");

    }

}

/* 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.

   NEED_POST_SPACE is non-zero when a space will be be needed

   between a trailing qualifier and a field, variable, or function

   name.  */

void

c_type_print_varspec_prefix (struct type *type, struct ui_file *stream,

                             int show, int passed_a_ptr, int need_post_space)

{

  char *name;

  if (type == 0)

    return;

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

    return;

  QUIT;

  switch (TYPE_CODE (type))

    {

    case TYPE_CODE_PTR:

      c_type_print_varspec_prefix (TYPE_TARGET_TYPE (type), stream, show, 1, 1);

      fprintf_filtered (stream, "*");

      c_type_print_modifier (type, stream, 1, need_post_space);

      break;

    case TYPE_CODE_MEMBERPTR:

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

      name = type_name_no_tag (TYPE_DOMAIN_TYPE (type));

      if (name)

        fputs_filtered (name, stream);

      else

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

      fprintf_filtered (stream, "::*");

      break;

    case TYPE_CODE_METHODPTR:

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

      fprintf_filtered (stream, "(");

      name = type_name_no_tag (TYPE_DOMAIN_TYPE (type));

      if (name)

        fputs_filtered (name, stream);

      else

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

      fprintf_filtered (stream, "::*");

      break;

    case TYPE_CODE_REF:

      c_type_print_varspec_prefix (TYPE_TARGET_TYPE (type), stream, show, 1, 0);

      fprintf_filtered (stream, "&");

      c_type_print_modifier (type, stream, 1, need_post_space);

      break;

    case TYPE_CODE_METHOD:

    case TYPE_CODE_FUNC:

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

      if (passed_a_ptr)

        fprintf_filtered (stream, "(");

      break;

    case TYPE_CODE_ARRAY:

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

      if (passed_a_ptr)

        fprintf_filtered (stream, "(");

      break;

    case TYPE_CODE_TYPEDEF:

      c_type_print_varspec_prefix (TYPE_TARGET_TYPE (type), stream, show, 0, 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_NAMESPACE:

    case TYPE_CODE_DECFLOAT:

      /* 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 c_type_print_varspec_prefix()"));

      break;

    }

}

/* Print out "const" and "volatile" attributes.

   TYPE is a pointer to the type being printed out.

   STREAM is the output destination.

   NEED_SPACE = 1 indicates an initial white space is needed */

static void

c_type_print_modifier (struct type *type, struct ui_file *stream,

                       int need_pre_space, int need_post_space)

{

  int did_print_modifier = 0;

  const char *address_space_id;

  /* We don't print `const' qualifiers for references --- since all

     operators affect the thing referenced, not the reference itself,

     every reference is `const'.  */

  if (TYPE_CONST (type)

      && TYPE_CODE (type) != TYPE_CODE_REF)

    {

      if (need_pre_space)

        fprintf_filtered (stream, " ");

      fprintf_filtered (stream, "const");

      did_print_modifier = 1;

    }

  if (TYPE_VOLATILE (type))

    {

      if (did_print_modifier || need_pre_space)

        fprintf_filtered (stream, " ");

      fprintf_filtered (stream, "volatile");

      did_print_modifier = 1;

    }

  address_space_id = address_space_int_to_name (get_type_arch (type),

                                                TYPE_INSTANCE_FLAGS (type));

  if (address_space_id)

    {

      if (did_print_modifier || need_pre_space)

        fprintf_filtered (stream, " ");

      fprintf_filtered (stream, "@%s", address_space_id);

      did_print_modifier = 1;

    }

  if (did_print_modifier && need_post_space)

    fprintf_filtered (stream, " ");

}

/* Print out the arguments of TYPE, which should have TYPE_CODE_METHOD

   or TYPE_CODE_FUNC, to STREAM.  Artificial arguments, such as "this"

   in non-static methods, are displayed if SHOW_ARTIFICIAL is

   non-zero. LANGUAGE is the language in which TYPE was defined.  This is

   a necessary evil since this code is used by the C, C++, and Java

   backends. */

void

c_type_print_args (struct type *type, struct ui_file *stream,

                   int show_artificial, enum language language)

{

  int i, len;

  struct field *args;

  int printed_any = 0;

  fprintf_filtered (stream, "(");

  args = TYPE_FIELDS (type);

  len = TYPE_NFIELDS (type);

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

    {

      if (TYPE_FIELD_ARTIFICIAL (type, i) && !show_artificial)

        continue;

      if (printed_any)

        {

          fprintf_filtered (stream, ", ");

          wrap_here ("    ");

        }

      if (language == language_java)

        java_print_type (TYPE_FIELD_TYPE (type, i), "", stream, -1, 0);

      else

        c_print_type (TYPE_FIELD_TYPE (type, i), "", stream, -1, 0);

      printed_any = 1;

    }

  if (printed_any && TYPE_VARARGS (type))

    {

      /* Print out a trailing ellipsis for varargs functions.  Ignore

         TYPE_VARARGS if the function has no named arguments; that

         represents unprototyped (K&R style) C functions.  */

      if (printed_any && TYPE_VARARGS (type))

        {

          fprintf_filtered (stream, ", ");

          wrap_here ("    ");

          fprintf_filtered (stream, "...");

        }

    }

  else if (!printed_any

           && ((TYPE_PROTOTYPED (type) && language != language_java)

               || language == language_cplus))

    fprintf_filtered (stream, "void");

  fprintf_filtered (stream, ")");

}

/* Return true iff the j'th overloading of the i'th method of TYPE

   is a type conversion operator, like `operator int () { ... }'.

   When listing a class's methods, we don't print the return type of

   such operators.  */

static int

is_type_conversion_operator (struct type *type, int i, int j)

{

  /* I think the whole idea of recognizing type conversion operators

     by their name is pretty terrible.  But I don't think our present

     data structure gives us any other way to tell.  If you know of

     some other way, feel free to rewrite this function.  */

  char *name = TYPE_FN_FIELDLIST_NAME (type, i);

  if (strncmp (name, "operator", 8) != 0)

    return 0;

  name += 8;

  if (! strchr (" \t\f\n\r", *name))

    return 0;

  while (strchr (" \t\f\n\r", *name))

    name++;

  if (!('a' <= *name && *name <= 'z')

      && !('A' <= *name && *name <= 'Z')

      && *name != '_')

    /* If this doesn't look like the start of an identifier, then it

       isn't a type conversion operator.  */

    return 0;

  else if (strncmp (name, "new", 3) == 0)

    name += 3;

  else if (strncmp (name, "delete", 6) == 0)

    name += 6;

  else

    /* If it doesn't look like new or delete, it's a type conversion

       operator.  */

    return 1;

  /* Is that really the end of the name?  */

  if (('a' <= *name && *name <= 'z')

      || ('A' <= *name && *name <= 'Z')

      || ('0' <= *name && *name <= '9')

      || *name == '_')

    /* No, so the identifier following "operator" must be a type name,

       and this is a type conversion operator.  */

    return 1;

  /* That was indeed the end of the name, so it was `operator new' or

     `operator delete', neither of which are type conversion operators.  */

  return 0;

}

/* Given a C++ qualified identifier QID, strip off the qualifiers,

   yielding the unqualified name.  The return value is a pointer into

   the original string.

   It's a pity we don't have this information in some more structured

   form.  Even the author of this function feels that writing little

   parsers like this everywhere is stupid.  */

static char *

remove_qualifiers (char *qid)

{

  int quoted = 0;                /* zero if we're not in quotes;

                                   '"' if we're in a double-quoted string;

                                   '\'' if we're in a single-quoted string.  */

  int depth = 0;         /* number of unclosed parens we've seen */

  char *parenstack = (char *) alloca (strlen (qid));

  char *scan;

  char *last = 0;                /* The character after the rightmost

                                   `::' token we've seen so far.  */

  for (scan = qid; *scan; scan++)

    {

      if (quoted)

        {

          if (*scan == quoted)

            quoted = 0;

          else if (*scan == '\\' && *(scan + 1))

            scan++;

        }

      else if (scan[0] == ':' && scan[1] == ':')

        {

          /* If we're inside parenthesis (i.e., an argument list) or

             angle brackets (i.e., a list of template arguments), then

             we don't record the position of this :: token, since it's

             not relevant to the top-level structure we're trying

             to operate on.  */

          if (depth == 0)

            {

              last = scan + 2;

              scan++;

            }

        }

      else if (*scan == '"' || *scan == '\'')

        quoted = *scan;

      else if (*scan == '(')

        parenstack[depth++] = ')';

      else if (*scan == '[')

        parenstack[depth++] = ']';

      /* We're going to treat <> as a pair of matching characters,

         since we're more likely to see those in template id's than

         real less-than characters.  What a crock.  */

      else if (*scan == '<')

        parenstack[depth++] = '>';

      else if (*scan == ')' || *scan == ']' || *scan == '>')

        {

          if (depth > 0 && parenstack[depth - 1] == *scan)

            depth--;

          else

            {

              /* We're going to do a little error recovery here.  If we

                 don't find a match for *scan on the paren stack, but

                 there is something lower on the stack that does match, we

                 pop the stack to that point.  */

              int i;

              for (i = depth - 1; i >= 0; i--)

                if (parenstack[i] == *scan)

                  {

                    depth = i;

                    break;

                  }

            }

        }

    }

  if (last)

    return last;

  else

    /* We didn't find any :: tokens at the top level, so declare the

       whole thing an unqualified identifier.  */

    return qid;

}

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

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

   Args work like c_type_print_varspec_prefix.  */

void

c_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, ")");

      fprintf_filtered (stream, "[");

      if (TYPE_LENGTH (TYPE_TARGET_TYPE (type)) > 0

        && !TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type))

        fprintf_filtered (stream, "%d",

                          (TYPE_LENGTH (type)

                           / TYPE_LENGTH (TYPE_TARGET_TYPE (type))));

      fprintf_filtered (stream, "]");

      c_type_print_varspec_suffix (TYPE_TARGET_TYPE (type), stream, show,

                                   0, 0);

      break;

    case TYPE_CODE_MEMBERPTR:

      c_type_print_varspec_suffix (TYPE_TARGET_TYPE (type), stream, show,

                                   0, 0);

      break;

    case TYPE_CODE_METHODPTR:

      fprintf_filtered (stream, ")");

      c_type_print_varspec_suffix (TYPE_TARGET_TYPE (type), stream, show,

                                   0, 0);

      break;

    case TYPE_CODE_PTR:

    case TYPE_CODE_REF:

      c_type_print_varspec_suffix (TYPE_TARGET_TYPE (type), stream, show,

                                   1, 0);

      break;

    case TYPE_CODE_METHOD:

    case TYPE_CODE_FUNC:

      if (passed_a_ptr)

        fprintf_filtered (stream, ")");

      if (!demangled_args)

        c_type_print_args (type, stream, 1, current_language->la_language);

      c_type_print_varspec_suffix (TYPE_TARGET_TYPE (type), stream, show,

                                   passed_a_ptr, 0);

      break;

    case TYPE_CODE_TYPEDEF:

      c_type_print_varspec_suffix (TYPE_TARGET_TYPE (type), stream, show,

                                   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_NAMESPACE:

    case TYPE_CODE_DECFLOAT:

      /* 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 c_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

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

                   int level)

{

  int i;

  int len, real_len;