[pforth] / csrc / pfcustom.c

/* @(#) pfcustom.c 98/01/26 1.3 */

#ifndef PF_USER_CUSTOM

/***************************************************************
** Call Custom Functions for pForth
**
** Create a file similar to this and compile it into pForth
** by setting -DPF_USER_CUSTOM="mycustom.c"
**
** Using this, you could, for example, call X11 from Forth.
** See "pf_cglue.c" for more information.
**
** Author: Phil Burk
** Copyright 1994 3DO, Phil Burk, Larry Polansky, David Rosenboom
**
** The pForth software code is dedicated to the public domain,
** and any third party may reproduce, distribute and modify
** the pForth software code or any derivative works thereof
** without any compensation or license.  The pForth software
** code is provided on an "as is" basis without any warranty
** of any kind, including, without limitation, the implied
** warranties of merchantability and fitness for a particular
** purpose and their equivalents under the laws of any jurisdiction.
**
***************************************************************/


#include "pf_all.h"

static cell_t CTest0( cell_t Val );
static void CTest1( cell_t Val1, cell_t Val2 );

/****************************************************************
** Step 1: Put your own special glue routines here
**     or link them in from another file or library.
****************************************************************/
static cell_t CTest0( cell_t Val )
{
   MSG_NUM_D("CTest0: Val = ", Val);
   return Val+1;
}

static void CTest1( cell_t Val1, cell_t Val2 )
{

   MSG("CTest1: Val1 = "); ffDot(Val1);
   MSG_NUM_D(", Val2 = ", Val2);
}

/****************************************************************
** Step 2: Create CustomFunctionTable.
**     Do not change the name of CustomFunctionTable!
**     It is used by the pForth kernel.
****************************************************************/

#ifdef PF_NO_GLOBAL_INIT
/******************
** If your loader does not support global initialization, then you
** must define PF_NO_GLOBAL_INIT and provide a function to fill
** the table. Some embedded system loaders require this!
** Do not change the name of LoadCustomFunctionTable()!
** It is called by the pForth kernel.
*/
#define NUM_CUSTOM_FUNCTIONS  (2)
CFunc0 CustomFunctionTable[NUM_CUSTOM_FUNCTIONS];

Err LoadCustomFunctionTable( void )
{
   CustomFunctionTable[0] = CTest0;
   CustomFunctionTable[1] = CTest1;
   return 0;
}

#else
/******************
** If your loader supports global initialization (most do.) then just
** create the table like this.
*/
CFunc0 CustomFunctionTable[] =
{
   (CFunc0) CTest0,
   (CFunc0) CTest1
};
#endif

/****************************************************************
** Step 3: Add custom functions to the dictionary.
**     Do not change the name of CompileCustomFunctions!
**     It is called by the pForth kernel.
****************************************************************/

#if (!defined(PF_NO_INIT)) && (!defined(PF_NO_SHELL))
Err CompileCustomFunctions( void )
{
   Err err;
   int i = 0;
/* Compile Forth words that call your custom functions.
** Make sure order of functions matches that in LoadCustomFunctionTable().
** Parameters are: Name in UPPER CASE, Function, Index, Mode, NumParams
*/
   err = CreateGlueToC( "CTEST0", i++, C_RETURNS_VALUE, 1 );
   if( err < 0 ) return err;
   err = CreateGlueToC( "CTEST1", i++, C_RETURNS_VOID, 2 );
   if( err < 0 ) return err;

   return 0;
}
#else
Err CompileCustomFunctions( void ) { return 0; }
#endif

/****************************************************************
** Step 4: Recompile using compiler option PF_USER_CUSTOM
**         and link with your code.
**         Then rebuild the Forth using "pforth -i system.fth"
**         Test:   10 Ctest0 ( should print message then '11' )
****************************************************************/

#endif  /* PF_USER_CUSTOM */