On Wednesday, May 31, 2006 2:54 AM Gernot Hueber wrote:

Due to that I want to call external library functions from within Aldor/Axiom I did some trials with Aldors "Foreign" and GCL "defentry" commands.

First of all, an example that work (partly), adapted from the aldor users guide.

The following definition needs to be compiled by lisp:

(defentry |myprintf| (string) (int "printf"))

; compiling file "/var/aw/var/LatexWiki/8624266922497102717-25px001.lisp" (written 04 APR 2022 08:16:59 PM):

; /var/lib/zope2.10/instance/axiom-wiki/var/LatexWiki/8624266922497102717-25px001.fasl written
; compilation finished in 0:00:00.012

   >> System error:
   The variable |myprintf| is unbound.

When this is compiled inside Axiom, the symbol |myprintf| becomes known inside the BOOT:: package. When we compile the Aldor code we need to include the package name.

#include "axiom.as"

SI ==> SingleInteger;

arigato():PositiveInteger == {
import { BOOT_:_:myprintf: (String) -> SI } from Foreign C;
import from SI;
BOOT_:_:myprintf("Arigato gozaimasu!");
1;
}

   Compiling FriCAS source code from file 
      /var/lib/zope2.10/instance/axiom-wiki/var/LatexWiki/6328445021691863648-25px002.as
      using Aldor compiler and options 
-O -Fasy -Fao -Flsp -lfricas -Mno-ALDOR_W_WillObsolete -DFriCAS -Y $FRICAS/algebra -I $FRICAS/algebra
      Use the system command )set compiler args to change these 
      options.
   The )library system command was not called after compilation.

Now call it:

arigato()

   There are no library operations named arigato 
      Use HyperDoc Browse or issue
                              )what op arigato
      to learn if there is any operation containing " arigato " in its 
      name.

   Cannot find a no-argument definition or library operation named 
      arigato .

Here is a slightly more interesting example that compiles some C language code and calls it from Aldor. Note: clines is a GCL-specific extension

(clines "

/*
 * nputs.c: A simple C function.
 */
void
nputs(int n, char *s)
{
        int     i;
        for (i = 0; i < n; i++) puts(s);
}

")

(defentry |nputs| (int string) (void "nputs"))

; compiling file "/var/aw/var/LatexWiki/6493135638062140292-25px004.lisp" (written 04 APR 2022 08:16:59 PM):

; /var/lib/zope2.10/instance/axiom-wiki/var/LatexWiki/6493135638062140292-25px004.fasl written
; compilation finished in 0:00:00.009

   >> System error:
   The function BOOT::CLINES is undefined.

#include "axiom.as"

SI ==> SingleInteger;

arigato2():PositiveInteger == {
import { BOOT_:_:nputs: (SI, String) -> SI } from Foreign C;
import from SI;
BOOT_:_:nputs(3,"Arigato gozaimasu!");
1;
}

   Compiling FriCAS source code from file 
      /var/lib/zope2.10/instance/axiom-wiki/var/LatexWiki/4532111654619318497-25px005.as
      using Aldor compiler and options 
-O -Fasy -Fao -Flsp -lfricas -Mno-ALDOR_W_WillObsolete -DFriCAS -Y $FRICAS/algebra -I $FRICAS/algebra
      Use the system command )set compiler args to change these 
      options.
   The )library system command was not called after compilation.

Now try it:

arigato2()

   There are no library operations named arigato2 
      Use HyperDoc Browse or issue
                              )what op arigato2
      to learn if there is any operation containing " arigato2 " in its
      name.

   Cannot find a no-argument definition or library operation named 
      arigato2 .

Here is a simple way to output a string by calling the Lisp function PRINC.

#include "axiom.as"

output(x:String):Void == {
import { PRINC: (String) -> Void } from Foreign Lisp;
PRINC(x);
}

   Compiling FriCAS source code from file 
      /var/lib/zope2.10/instance/axiom-wiki/var/LatexWiki/7406390156942832244-25px007.as
      using Aldor compiler and options 
-O -Fasy -Fao -Flsp -lfricas -Mno-ALDOR_W_WillObsolete -DFriCAS -Y $FRICAS/algebra -I $FRICAS/algebra
      Use the system command )set compiler args to change these 
      options.
   The )library system command was not called after compilation.

Try it.

output("stuff")

   stuff