string_rep Class Reference

#include <string.hpp>

Inheritance diagram for string_rep:

Collaboration diagram for string_rep:

Public Member Functions
	string_rep ()
	string_rep (int n)
	~string_rep ()
int	expand_or_shrink_by (int delta)
	expand (or shrink) string by delta, but do not release memory when string is shrinked.
void	resize (int n)
	expand (or shrink) string to given length n, and try to release memory when string is shrinked.
void	reserve (int n)
	reserve memory space to contain at least n word in the whole string. Do not affect length of string, and do not release memory when n is smaller than current space.

Private Attributes
int	n
char *	a
int	a_N
Private Attributes inherited from concrete_struct
int	ref_count
	The reference count for the concrete object.

Friends
class	string
int	N (string a)

Additional Inherited Members
Private Member Functions inherited from concrete_struct
	concrete_struct ()
	Default constructor for the concrete object. Increments the reference count.
virtual	~concrete_struct ()
	Virtual destructor for the concrete object. Decrements the reference count.

Detailed Description

Definition at line 24 of file string.hpp.

Constructor & Destructor Documentation

string_rep() [1/2]

string_rep::string_rep ( )

inline

Definition at line 30 of file string.hpp.

: n (0), a_N (0), a (NULL) {}

string_rep() [2/2]

string_rep::string_rep

(

int

n

)

Definition at line 34 of file string.cpp.

                              : n (n2), a_N (round_length (n2)), a (nullptr) {
  if (a_N != 0) {
    a= tm_new_array<char> (a_N);
  }
}

~string_rep()

string_rep::~string_rep ( )

inline

Definition at line 32 of file string.hpp.

                        {
    if (a_N != 0) tm_delete_array (a);
  }

Member Function Documentation

expand_or_shrink_by()

int string_rep::expand_or_shrink_by

(

int

delta

)

expand (or shrink) string by delta, but do not release memory when string is shrinked.

Returns

string length before expansion

Definition at line 65 of file string.cpp.

                                          {
  int old_n= n;
  n+= delta;
  reserve (n);
  return old_n;
}

resize()

void string_rep::resize

(

int

n

)

expand (or shrink) string to given length n, and try to release memory when string is shrinked.

Note

expand_or_shrink_by may be faster if memory space is reserved

Definition at line 41 of file string.cpp.

                         {
  int nn= round_length (n);
  int mm= round_length (m);
  if (mm != nn) {
    if (mm != 0) {
      if (nn != 0) {
        a_N= mm;
        a  = tm_resize_array<char> (mm, a);
      }
      else {
        a_N= mm;
        a  = tm_new_array<char> (mm);
      }
    }
    else if (nn != 0) {
      tm_delete_array (a);
      a_N= 0;
      a  = NULL;
    };
  }
  n= m;
}

reserve()

void string_rep::reserve

(

int

n

)

reserve memory space to contain at least n word in the whole string. Do not affect length of string, and do not release memory when n is smaller than current space.

Definition at line 73 of file string.cpp.

                              {
  int old_size= a_N;
  if (new_n != 0) {
    if (old_size == 0) {
      a_N= round_length (new_n);
      a  = tm_new_array<char> (a_N);
    }
    else if (old_size < new_n) {
      a_N= round_length (new_n);
      a  = tm_resize_array<char> (a_N, a);
    }
  }
  else {
    if (old_size != 0) {
      tm_delete_array (a);
      a  = NULL;
      a_N= 0;
    };
  }
}

Friends And Related Symbol Documentation

string

friend class string

friend

Definition at line 58 of file string.hpp.

N

int N ( string a )

friend

Definition at line 86 of file string.hpp.

             {
  return a->n;
}

Member Data Documentation

n

int string_rep::n

private

Definition at line 25 of file string.hpp.

a

char* string_rep::a

private

Definition at line 26 of file string.hpp.

a_N

int string_rep::a_N

private

Definition at line 27 of file string.hpp.

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The documentation for this class was generated from the following files:

• string.hpp
• string.cpp