text: /*
   * Copyright (c) 2015 ARM Limited. All rights reserved.
   * SPDX-License-Identifier: Apache-2.0
   * Licensed under the Apache License, Version 2.0 (the License); you may
   * not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an AS IS BASIS, WITHOUT
   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  #ifndef M2M_STRING_H
  #define M2M_STRING_H
  
  #include <stddef.h> // size_t
  #include <stdexcept>
  #include <stdint.h>
  
  class Test_M2MString;
  
  namespace m2m
  {
  
    /** \brief Simple C++ string class, used as replacement for
     std::string.
     */
    class String
    {
      char* p;           ///< The data
      size_t allocated_;  ///< The allocated memory size (including trailing NULL)
      size_t size_;       ///< The currently used memory size (excluding trailing NULL)
  
    public:
      typedef size_t size_type;
      static const size_type npos;
  
      String();
      virtual ~String();
      String(const String&);
      String(const char*);
  
      String& operator=(const char*);
      String& operator=(const String&);
  
      String& operator+=(const String&);
      String& operator+=(const char*);
      String& operator+=(char);
      void push_back(char);
  
      bool operator==(const char*) const;
      bool operator==(const String&) const;
  
      void clear();       // set string to empty string (memory remains reserved)
  
      size_type size()   const   { return size_; }   ///< size without terminating NULL
      size_type length() const   { return size_; }   ///< as size()
  
      size_type capacity() const { return allocated_-1; }
  
      bool empty() const    { return size_ == 0; }
  
      const char* c_str() const { return p; } ///< raw data
  
      /** Reserve internal string memory so that n characters can be put into the
          string (plus 1 for the NULL char). If there is already enough memory,
          nothing happens, if not, the memory will be realloated to exactly this
          amount.
          */
      void reserve( size_type n);
  
      /** Resize string. If n is less than the current size, the string will be truncated.
          If n is larger, the memory will be reallocated to exactly this amount, and
          the additional characters will be NULL characters.
          */
      void resize( size_type n);
  
      /** Resize string. If n is less than the current size, the string will be truncated.
          If n is larger, the memory will be reallocated to exactly this amount, and
          the additional characters will be c characters.
          */
      void resize( size_type n, char c);
  
      /// swap contents
      void swap( String& );
  
      String substr(const size_type pos, size_type length) const;
  
      // unchecked access:
      char& operator[](const size_type i)       { return p[i]; }
      char operator[](const size_type i) const { return p[i]; }
      // checked access:
      char& at(const size_type i);
      char at(const size_type i) const;
  
      /// erase len characters at position pos
      String& erase(size_type pos, size_type len);
      /// Append n characters of a string
      String& append(const char* str, size_type n);
  
      int compare( size_type pos, size_type len, const String& str ) const;
      int compare( size_type pos, size_type len, const char*   str ) const;
  
      int find_last_of(char c) const;
  
      static uint8_t* convert_integer_to_array(int64_t value, uint8_t &size);
  
    private:
      // reallocate the internal memory
      void new_realloc( size_type n);
      char* strdup(const char* other);
  
      char _return_value;
  
      friend class ::Test_M2MString;
  
    };
    // class
  
    bool operator<(const String&, const String&);
  
    void reverse(char s[], uint32_t length);
  
    uint32_t itoa_c (int64_t n, char s[]);
  } // namespace
  
  
  #endif // M2M_STRING_H
  