Category : C++ Source Code
Archive   : IDIOMS.ZIP
Filename : 3-8.C

 
Output of file : 3-8.C contained in archive : IDIOMS.ZIP
/* Copyright (c) 1992 by AT&T Bell Laboratories. */
/* Advanced C++ Programming Styles and Idioms */
/* James O. Coplien */
/* All rights reserved. */

#include
#include

class StringRep {
friend String;
private:
StringRep(const char *s) {
::strcpy(rep = new char[::strlen(s)+1], s);
count = 1;
}
~StringRep() { delete[] rep; }
private:
char *rep;
int count;
};

class String {
public:
String() { rep = new StringRep(""); }
String(const String& s) { rep = s.rep; rep->count++; }
String& operator=(const String& s) {
s.rep->count++;
if (--rep->count <= 0) delete rep;
rep = s.rep;
return *this;
}
~String() {
if (--rep->count <= 0) delete rep;
}
String(const char *s) { rep = new StringRep(s); }
String operator+(const String&) const;
int length() const { return ::strlen(rep->rep); }
private:
StringRep *rep;
};

String String::operator+(const String& s) const
{
char *buf = new char[s.length() + length() + 1];
::strcpy(buf, rep->rep);
::strcat(buf, s.rep->rep);
String retval( buf );
delete[] buf; // get rid of temporary storage
return retval;
}


  3 Responses to “Category : C++ Source Code
Archive   : IDIOMS.ZIP
Filename : 3-8.C
”

  1. Daniel says:
    January 27, 2013 at 3:59 pm

    Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!

  2. Joshie says:
    March 18, 2014 at 4:57 pm

    This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.

  3. DiskingRound says:
    January 14, 2015 at 10:57 pm

    But one thing that puzzles me is the “mtswslnkmcjklsdlsbdmMICROSOFT” string. There is an article about it here. It is definitely worth a read: http://www.os2museum.com/wp/mtswslnk/