/* D language support routines for GDB, the GNU debugger.

   Copyright (C) 2005, 2006, 2008, 2009, 2010, 2011
   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 "symtab.h"
#include "language.h"
#include "d-lang.h"
#include "c-lang.h"
#include "gdb_string.h"
#include "parser-defs.h"
#include "gdb_obstack.h"

#include <ctype.h>

/* Extract identifiers from MANGLED_STR and append it to TEMPBUF.
   Return 1 on success or 0 on failure.  */
static int
extract_identifiers (const char *mangled_str, struct obstack *tempbuf)
{
  long i = 0;

  while (isdigit (*mangled_str))
    {
      char *end_ptr;

      i = strtol (mangled_str, &end_ptr, 10);
      mangled_str = end_ptr;
      if (i <= 0 || strlen (mangled_str) < i)
        return 0;
      obstack_grow (tempbuf, mangled_str, i);
      mangled_str += i;
      obstack_grow_str (tempbuf, ".");
    }
  if (*mangled_str == '\0' || i == 0)
    return 0;
  obstack_blank (tempbuf, -1);
  return 1;
}

/* Extract and demangle type from MANGLED_STR and append it to TEMPBUF.
   Return 1 on success or 0 on failure.  */
static int
extract_type_info (const char *mangled_str, struct obstack *tempbuf)
{
  if (*mangled_str == '\0')
    return 0;
  switch (*mangled_str++)
    {
      case 'A': /* dynamic array */
      case 'G': /* static array */
      case 'H': /* associative array */
	if (!extract_type_info (mangled_str, tempbuf))
	  return 0;
	obstack_grow_str (tempbuf, "[]");
	return 1;
      case 'P': /* pointer */
	if (!extract_type_info (mangled_str, tempbuf))
	  return 0;
	obstack_grow_str (tempbuf, "*");
	return 1;
      case 'R': /* reference */
	if (!extract_type_info (mangled_str, tempbuf))
	  return 0;
	obstack_grow_str (tempbuf, "&");
	return 1;
      case 'Z': /* return value */
	return extract_type_info (mangled_str, tempbuf);
      case 'J': /* out */
	obstack_grow_str (tempbuf, "out ");
	return extract_type_info (mangled_str, tempbuf);
      case 'K': /* inout */
	obstack_grow_str (tempbuf, "inout ");
	return extract_type_info (mangled_str, tempbuf);
      case 'E': /* enum */
      case 'T': /* typedef */
      case 'D': /* delegate */
      case 'C': /* class */
      case 'S': /* struct */
	return extract_identifiers (mangled_str, tempbuf);

      /* basic types: */
      case 'n': obstack_grow_str (tempbuf, "none"); return 1;
      case 'v': obstack_grow_str (tempbuf, "void"); return 1;
      case 'g': obstack_grow_str (tempbuf, "byte"); return 1;
      case 'h': obstack_grow_str (tempbuf, "ubyte"); return 1;
      case 's': obstack_grow_str (tempbuf, "short"); return 1;
      case 't': obstack_grow_str (tempbuf, "ushort"); return 1;
      case 'i': obstack_grow_str (tempbuf, "int"); return 1;
      case 'k': obstack_grow_str (tempbuf, "uint"); return 1;
      case 'l': obstack_grow_str (tempbuf, "long"); return 1;
      case 'm': obstack_grow_str (tempbuf, "ulong"); return 1;
      case 'f': obstack_grow_str (tempbuf, "float"); return 1;
      case 'd': obstack_grow_str (tempbuf, "double"); return 1;
      case 'e': obstack_grow_str (tempbuf, "real"); return 1;

      /* imaginary and complex: */
      case 'o': obstack_grow_str (tempbuf, "ifloat"); return 1;
      case 'p': obstack_grow_str (tempbuf, "idouble"); return 1;
      case 'j': obstack_grow_str (tempbuf, "ireal"); return 1;
      case 'q': obstack_grow_str (tempbuf, "cfloat"); return 1;
      case 'r': obstack_grow_str (tempbuf, "cdouble"); return 1;
      case 'c': obstack_grow_str (tempbuf, "creal"); return 1;

      /* other types: */
      case 'b': obstack_grow_str (tempbuf, "bit"); return 1;
      case 'a': obstack_grow_str (tempbuf, "char"); return 1;
      case 'u': obstack_grow_str (tempbuf, "wchar"); return 1;
      case 'w': obstack_grow_str (tempbuf, "dchar"); return 1;

      default:
	obstack_grow_str (tempbuf, "unknown");
	return 1;
    }
}

/* Implements the la_demangle language_defn routine for language D.  */
char *
d_demangle (const char *symbol, int options)
{
  struct obstack tempbuf;
  char *out_str;
  unsigned char is_func = 0;

  if (symbol == NULL)
    return NULL;
  else if (strcmp (symbol, "_Dmain") == 0)
    return xstrdup ("D main");

  obstack_init (&tempbuf);
  
  if (symbol[0] == '_' && symbol[1] == 'D')
    {
      symbol += 2;
      is_func = 1;
    }
  else if (strncmp (symbol, "__Class_", 8) == 0)
    symbol += 8;
  else if (strncmp (symbol, "__init_", 7) == 0)
    symbol += 7;
  else if (strncmp (symbol, "__vtbl_", 7) == 0)
    symbol += 7;
  else if (strncmp (symbol, "__modctor_", 10) == 0)
    symbol += 10;
  else if (strncmp (symbol, "__moddtor_", 10) == 0)
    symbol += 10;
  else if (strncmp (symbol, "__ModuleInfo_", 13) == 0)
    symbol += 13;
  else
    {
      obstack_free (&tempbuf, NULL);
      return NULL;
    }
  
  if (!extract_identifiers (symbol, &tempbuf))
    {
      obstack_free (&tempbuf, NULL);
      return NULL;
    }

  obstack_grow_str (&tempbuf, "(");
  if (is_func == 1 && *symbol == 'F')
    {
      symbol++;
      while (*symbol != '\0' && *symbol != 'Z')
	{
	  if (is_func == 1)
	    is_func++;
	  else
	    obstack_grow_str (&tempbuf, ", ");
	  if (!extract_type_info (symbol, &tempbuf))
	    {
	      obstack_free (&tempbuf, NULL);
	      return NULL;
	   }
	}
     }
  obstack_grow_str0 (&tempbuf, ")");

  /* Doesn't display the return type, but wouldn't be too hard to do.  */

  out_str = xstrdup (obstack_finish (&tempbuf));
  obstack_free (&tempbuf, NULL);
  return out_str;
}

/* Table mapping opcodes into strings for printing operators
   and precedences of the operators.  */
static const struct op_print d_op_print_tab[] =
{
  {",", BINOP_COMMA, PREC_COMMA, 0},
  {"=", BINOP_ASSIGN, PREC_ASSIGN, 1},
  {"||", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
  {"&&", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
  {"|", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0},
  {"^", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0},
  {"&", BINOP_BITWISE_AND, PREC_BITWISE_AND, 0},
  {"==", BINOP_EQUAL, PREC_EQUAL, 0},
  {"!=", BINOP_NOTEQUAL, PREC_EQUAL, 0},
  {"<=", BINOP_LEQ, PREC_ORDER, 0},
  {">=", BINOP_GEQ, PREC_ORDER, 0},
  {">", BINOP_GTR, PREC_ORDER, 0},
  {"<", BINOP_LESS, PREC_ORDER, 0},
  {">>", BINOP_RSH, PREC_SHIFT, 0},
  {"<<", BINOP_LSH, PREC_SHIFT, 0},
  {"+", BINOP_ADD, PREC_ADD, 0},
  {"-", BINOP_SUB, PREC_ADD, 0},
  {"*", BINOP_MUL, PREC_MUL, 0},
  {"/", BINOP_DIV, PREC_MUL, 0},
  {"%", BINOP_REM, PREC_MUL, 0},
  {"@", BINOP_REPEAT, PREC_REPEAT, 0},
  {"-", UNOP_NEG, PREC_PREFIX, 0},
  {"!", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
  {"~", UNOP_COMPLEMENT, PREC_PREFIX, 0},
  {"*", UNOP_IND, PREC_PREFIX, 0},
  {"&", UNOP_ADDR, PREC_PREFIX, 0},
  {"sizeof ", UNOP_SIZEOF, PREC_PREFIX, 0},
  {"++", UNOP_PREINCREMENT, PREC_PREFIX, 0},
  {"--", UNOP_PREDECREMENT, PREC_PREFIX, 0},
  {NULL, 0, 0, 0}
};

static const struct language_defn d_language_defn =
{
  "d",
  language_d,
  range_check_off,
  type_check_off,
  case_sensitive_on,
  array_row_major,
  macro_expansion_c,
  &exp_descriptor_c,
  c_parse,
  c_error,
  null_post_parser,
  c_printchar,			/* Print a character constant.  */
  c_printstr,			/* Function to print string constant.  */
  c_emit_char,			/* Print a single char.  */
  c_print_type,			/* Print a type using appropriate syntax.  */
  c_print_typedef,		/* Print a typedef using appropriate
				   syntax.  */
  d_val_print,			/* Print a value using appropriate syntax.  */
  c_value_print,		/* Print a top-level value.  */
  NULL,				/* Language specific skip_trampoline.  */
  "this",
  basic_lookup_symbol_nonlocal, 
  basic_lookup_transparent_type,
  d_demangle,			/* Language specific symbol demangler.  */
  NULL,				/* Language specific
				   class_name_from_physname.  */
  d_op_print_tab,		/* Expression operators for printing.  */
  1,				/* C-style arrays.  */
  0,				/* String lower bound.  */
  default_word_break_characters,
  default_make_symbol_completion_list,
  c_language_arch_info,
  default_print_array_index,
  default_pass_by_reference,
  c_get_string,
  LANG_MAGIC
};

void
_initialize_d_language (void)
{
  add_language (&d_language_defn);
}
