/*

 * Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

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

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

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

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 *

 */

#ifndef SHARE_VM_SERVICES_DIAGNOSTICARGUMENT_HPP

#define SHARE_VM_SERVICES_DIAGNOSTICARGUMENT_HPP

#include "classfile/vmSymbols.hpp"

#include "memory/allocation.hpp"

#include "runtime/os.hpp"

#include "runtime/thread.hpp"

#include "utilities/exceptions.hpp"

class StringArrayArgument : public CHeapObj<mtInternal> {

private:

  GrowableArray<char*>* _array;

public:

  StringArrayArgument() {

    _array = new(ResourceObj::C_HEAP, mtInternal)GrowableArray<char *>(32, true);

    assert(_array != NULL, "Sanity check");

  }

  void add(const char* str, size_t len) {

    if (str != NULL) {

      char* ptr = NEW_C_HEAP_ARRAY(char, len+1, mtInternal);

      strncpy(ptr, str, len);

      ptr[len] = 0;

      _array->append(ptr);

    }

  }

  GrowableArray<char*>* array() {

    return _array;

  }

  ~StringArrayArgument() {

    for (int i=0; i<_array->length(); i++) {

      if(_array->at(i) != NULL) { // Safety check

        FREE_C_HEAP_ARRAY(char, _array->at(i));

      }

    }

    delete _array;

  }

};

class NanoTimeArgument {

public:

  jlong _nanotime;

  jlong _time;

  char _unit[3];

};

class MemorySizeArgument {

public:

  u8 _size;

  u8 _val;

  char _multiplier;

};

class GenDCmdArgument : public ResourceObj {

protected:

  GenDCmdArgument* _next;

  const char*      _name;

  const char*      _description;

  const char*      _type;

  const char*      _default_string;

  bool             _is_set;

  bool             _is_mandatory;

  bool             _allow_multiple;

  GenDCmdArgument(const char* name, const char* description, const char* type,

                  const char* default_string, bool mandatory) {

    _name = name;

    _description = description;

    _type = type;

    _default_string = default_string;

    _is_mandatory = mandatory;

    _is_set = false;

    _allow_multiple = false;

  };

public:

  const char* name() { return _name; }

  const char* description() { return _description; }

  const char* type() { return _type; }

  const char* default_string() { return _default_string; }

  bool is_set() { return _is_set; }

  void set_is_set(bool b) { _is_set = b; }

  bool allow_multiple() { return _allow_multiple; }

  bool is_mandatory() { return _is_mandatory; }

  bool has_value() { return _is_set || _default_string != NULL; }

  bool has_default() { return _default_string != NULL; }

  void read_value(const char* str, size_t len, TRAPS);

  virtual void parse_value(const char* str, size_t len, TRAPS) = 0;

  virtual void init_value(TRAPS) = 0;

  virtual void reset(TRAPS) = 0;

  virtual void cleanup() = 0;

  virtual void value_as_str(char* buf, size_t len) = 0;

  void set_next(GenDCmdArgument* arg) {

    _next = arg;

  }

  GenDCmdArgument* next() {

    return _next;

  }

  void to_string(jlong l, char* buf, size_t len);

  void to_string(bool b, char* buf, size_t len);

  void to_string(char* c, char* buf, size_t len);

  void to_string(NanoTimeArgument n, char* buf, size_t len);

  void to_string(MemorySizeArgument f, char* buf, size_t len);

  void to_string(StringArrayArgument* s, char* buf, size_t len);

};

template <class ArgType> class DCmdArgument: public GenDCmdArgument {

private:

  ArgType _value;

public:

  DCmdArgument(const char* name, const char* description, const char* type,

               bool mandatory) :

               GenDCmdArgument(name, description, type, NULL, mandatory) { }

  DCmdArgument(const char* name, const char* description, const char* type,

               bool mandatory, const char* defaultvalue) :

               GenDCmdArgument(name, description, type, defaultvalue, mandatory)

               { }

  ~DCmdArgument() { destroy_value(); }

  ArgType value() { return _value;}

  void set_value(ArgType v) { _value = v; }

  void reset(TRAPS) {

    destroy_value();

    init_value(CHECK);

    _is_set = false;

  }

  void cleanup() {

    destroy_value();

  }

  void parse_value(const char* str, size_t len, TRAPS);

  void init_value(TRAPS);

  void destroy_value();

  void value_as_str(char *buf, size_t len) { return to_string(_value, buf, len);}

};

#endif  /* SHARE_VM_SERVICES_DIAGNOSTICARGUMENT_HPP */