• Alain De Vos (36/36) Apr 24 2022 I'm currenlty experimenting about binding to C.
• Alain De Vos (4/4) Apr 24 2022 ```
• user1234 (10/29) Apr 24 2022 Why not just

Alain De Vos <devosalain ymail.com> writes:

I'm currenlty experimenting about binding to C.
I have :
C-library:

mylib.h:
```
void libprintme(char *s);
```

mylib.c:
```
#include <stdio.h>
#include "mylib.h"
void libprintme(char *s){printf("%s",s);}
```

main.d:
```
extern(C)  nogc nothrow {
	void libprintme(char *s);
     alias pprintme=void function(char *s);
     __gshared pprintme cprintme=&libprintme;

}

extern(D) {
	void dprintme(string ds){
		alias dstring=string;
		alias cstring=char *;
		import std.conv: to,castFrom;
		cstring cs=castFrom!dstring.to!cstring(ds);
		(*cprintme)(cs);
		import core.stdc.stdio: printf;
		printf("World");
	}
```

Can this procedure be used for larger C-libraries ?
What is good , what is bad , what can be better. Feel free to 
elaborate ?

(It's the C-preprocessor with macro expansion which gives me 
sometimes a bit of a headache.)

Alain De Vos <devosalain ymail.com> writes:

```
void main(){dprintme("Hello\n");}
}
```

user1234 <user1234 12.de> writes:

On Sunday, 24 April 2022 at 15:13:15 UTC, Alain De Vos wrote:
 I'm currenlty experimenting about binding to C.
 I have :
 C-library:

 mylib.h:
 ```
 void libprintme(char *s);
 ```

 mylib.c:
 ```
 #include <stdio.h>
 #include "mylib.h"
 void libprintme(char *s){printf("%s",s);}
 ```

 [...]


 Can this procedure be used for larger C-libraries ?
 What is good , what is bad , what can be better. Feel free to 
 elaborate ?

 (It's the C-preprocessor with macro expansion which gives me 
 sometimes a bit of a headache.)

Why not just

```d
extern(C)  nogc nothrow {
     void libprintme(char *s);
     alias cprintme = libprintme;
}
```

?

The function pointer looks totally superfluous to me.