amxmodx/public/amtl/am-fixedarray.h

// vim: set sts=8 ts=2 sw=2 tw=99 et:
//
// Copyright (C) 2013-2014, David Anderson and AlliedModders LLC
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
// 
//  * Redistributions of source code must retain the above copyright notice, this
//    list of conditions and the following disclaimer.
//  * Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
//    and/or other materials provided with the distribution.
//  * Neither the name of AlliedModders LLC nor the names of its contributors
//    may be used to endorse or promote products derived from this software
//    without specific prior written permission.
//
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#ifndef _include_amtl_fixedarray_h_
#define _include_amtl_fixedarray_h_

#include <am-utility.h>
#include <am-allocator-policies.h>
#include <am-moveable.h>

namespace ke {

template <typename T, typename AllocPolicy = SystemAllocatorPolicy>
class FixedArray : public AllocPolicy
{
 public:
  FixedArray(size_t length, AllocPolicy = AllocPolicy()) {
    length_ = length;
    data_ = (T *)this->malloc(sizeof(T) * length_);
    if (!data_)
      return;

    for (size_t i = 0; i < length_; i++)
      new (&data_[i]) T();
  }
  ~FixedArray() {
    for (size_t i = 0; i < length_; i++)
      data_[i].~T();
    this->free(data_);
  }

  // This call may be skipped if the allocator policy is infallible.
  bool initialize() {
    return length_ == 0 || !!data_;
  }

  size_t length() const {
    return length_;
  }
  T &operator [](size_t index) {
    return at(index);
  }
  const T &operator [](size_t index) const {
    return at(index);
  }
  T &at(size_t index) {
    assert(index < length());
    return data_[index];
  }
  const T &at(size_t index) const {
    assert(index < length());
    return data_[index];
  }
  T &back() {
    assert(length() > 0);
    return data_[length() - 1];
  }
  const T &back() const {
    assert(length() > 0);
    return data_[length() - 1];
  }

  T *buffer() const {
    return data_;
  }

 private:
  FixedArray(const FixedArray &other) KE_DELETE;
  FixedArray &operator =(const FixedArray &other) KE_DELETE;

 private:
  size_t length_;
  T *data_;
};

} // namespace ke

#endif // _include_amtl_fixedarray_h_