Category : C++ Source Code
Archive   : OOSTRI.ZIP
Filename : OOSTRING.H

// OOSTRING.H
//
// Class library for strings

///////////////////////////////////////////////////////////////////////////

#ifndef __cplusplus
#error Must use C++ for the type string.
#endif

#ifndef __OOSTRING_H
#define __OOSTRING_H

#ifndef NULL
#if defined(__TINY__) || defined(__SMALL__) || defined(__MEDIUM__)
#define NULL 0
#else
#define NULL 0L
#endif
#endif

#if defined(__SMALL__) || defined(__MEDIUM__)
#define _CLASSTYPE near
#elif defined(__COMPACT__) || defined(__LARGE__)
#define _CLASSTYPE far
#else
#define _CLASSTYPE huge
#endif


///////////////////////////////////////////////////////////////////////////

#include ".\stacks\object.h"
#include
#include
#include
#include
#include

///////////////////////////////////////////////////////////////////////////

class _CLASSTYPE string : public object
{
protected:

char *string_ptr; // character array
int size; // allocated space
int length; // length of string

public:

string() : string_ptr(NULL), size(0), length(0) {}; // void constructor
string(char *str); // char array
string(char ch); // character
string(const string &src); // copy constructor
~string() // destructor
{
delete string_ptr; // release storage space
}

string& operator=(const string &src);// assignment operator
friend string operator+(const string &str1, const string &str2);
string operator+=(const string &str);
string operator+(); // unary operator +
string operator-(); // unary operator -
string& operator++(); // convert to uppercase
string& operator--(); // convert to lowercase
char& operator[](const int index); // allow access to chars in string. Can be used as an lvalue
friend int operator>(const string &str1, const string &str2)
{
return (strcmp(str1.string_ptr, str2.string_ptr) > 0);
} // end of operator >

friend int operator<(const string &str1, const string &str2)
{
return (strcmp(str1.string_ptr, str2.string_ptr) < 0);
} // end of operator <

friend int operator==(const string &str1, const string &str2)
{
return (strcmp(str1.string_ptr, str2.string_ptr) == 0);
} // end of operator ==

friend int operator!=(const string &str1, const string &str2)
{
return !(strcmp(str1.string_ptr, str2.string_ptr) == 0);
} // end of operator !=

friend int operator>=(const string &str1, const string &str2)
{
return ((str1 > str2) || (str1 == str2));
} // end of operator >=

friend int operator<=(const string &str1, const string &str2)
{
return ((str1 < str2) || (str1 == str2));
} // end of operator <=

friend ostream& operator<<(ostream &stream, const string &str);
friend ostream& operator<<(ostream &stream, const string *str);
friend istream& operator>>(istream& stream, string& str);

int setsize(const int newsize);
int len() { return (length);}
void getline(istream& stream, const int maxlen = 80);
}; // end of class string

#endif