class and method

[Aniruddha]

How do I simulate(to a minimal extent) the
notion of classes and methods in C ?

[Nils Petter Vaskinn]

On Sun, 23 Nov 2003 22:30:54 -0800, Aniruddha wrote:

How do I simulate(to a minimal extent) the
notion of classes and methods in C ?

struct my_class {
int blah;
};
my_class *new_myclass() {
struct my_class *this;
this = malloc(sizeof *this);
/* error handling here */
}

void delete_myclass(struct my_class *this) {
free(this);
}

void my_method(struct my_class *this) {
do_something_to(this);
}

--
NPV

"the large print giveth, and the small print taketh away"
Tom Waits - Step right up

[Jirka Klaue]

Nils Petter Vaskinn wrote:

On Sun, 23 Nov 2003 22:30:54 -0800, Aniruddha wrote:

How do I simulate(to a minimal extent) the
notion of classes and methods in C ?
struct my_class {
int blah;
};

my_class *new_myclass() {

struct my_class *new_myclass() {
struct my_class *this;
this = malloc(sizeof *this);
/* error handling here */
return this;
}

void delete_myclass(struct my_class *this) {
free(this);
}

void my_method(struct my_class *this) {
do_something_to(this);
}

You may want to add function pointers to struct my_class to
emulate the C++ notion even better.

Jirka

[Nils Petter Vaskinn]

On Mon, 24 Nov 2003 13:56:57 +0100, Jirka Klaue wrote:

Nils Petter Vaskinn wrote:

On Sun, 23 Nov 2003 22:30:54 -0800, Aniruddha wrote:

How do I simulate(to a minimal extent) the
notion of classes and methods in C ?

my_class *new_myclass() {
struct my_class *new_myclass() {

doh.

struct my_class *this;
this = malloc(sizeof *this);
/* error handling here */
return this;

doh!

I need to proofread my posts. But I think I got the general idea across.
You may want to add function pointers to struct my_class to
emulate the C++ notion even better.

Depending on the definition of "minimal extent". But for every step
towards "real" classes it becomes more complex and the OP should consider
actually using C++ instead.
--
NPV

"the large print giveth, and the small print taketh away"
Tom Waits - Step right up

[Jirka Klaue]

Nils Petter Vaskinn wrote:

On Mon, 24 Nov 2003 13:56:57 +0100, Jirka Klaue wrote:

....

You may want to add function pointers to struct my_class to
emulate the C++ notion even better.

Depending on the definition of "minimal extent". But for every step
towards "real" classes it becomes more complex and the OP should consider
actually using C++ instead.

:-) Very true.

Jirka

[E. Robert Tisdale]

Aniruddha wrote:

How do I simulate(to a minimal extent) the
notion of classes and methods in C ?

Take a look at
The ANSI C Numerical Class Library
http://www.netwood.net/~edwin/svmtl/

Also, run-time polymorphism has been discussed at length
in the comp.lang.c newsgroup. See Google Groups

http://groups.google.com/

and search for

Tisdale Shape group:comp.lang.c.*

Both Re: "class" in C and Re: C version of C++'s virtual functions
contain an ANSI C implementation of Bjarne Stroustrups Shape class.