/*
 * $Id$
 */

/*
 * Harbour Project source code:
 * Preprocessor runtime library callable version
 *
 * Copyright 1999 Felipe G. Coury
 * www - http://www.harbour-project.org
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version, with one exception:
 *
 * The exception is that if you link the Harbour Runtime Library (HRL)
 * and/or the Harbour Virtual Machine (HVM) with other files to produce
 * an executable, this does not by itself cause the resulting executable
 * to be covered by the GNU General Public License. Your use of that
 * executable is in no way restricted on account of linking the HRL
 * and/or HVM code into it.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA (or visit
 * their web site at http://www.gnu.org/).
 *
 */

/*
 * Avoid tracing in preprocessor/compiler.
 */
#if ! defined(HB_TRACE_UTILS)
   #if defined(HB_TRACE_LEVEL)
      #undef HB_TRACE_LEVEL
   #endif
#endif

#include <stdio.h>
#include <setjmp.h>

#include "hbpp.h"
#include "hbcomp.h"
#include "hbapi.h"
#include "hbapierr.h"

PATHNAMES * hb_comp_pIncludePath = NULL;
PHB_FNAME   hb_comp_pFileName = NULL;
FILES       hb_comp_files;
int         hb_comp_iLine;       /* currently parsed file line number */

/* These are need for the PP #pragma support */
BOOL hb_comp_bPPO = FALSE;                      /* flag indicating, is ppo output needed */
BOOL hb_comp_bStartProc = TRUE;                 /* holds if we need to create the starting procedure */
BOOL hb_comp_bLineNumbers = TRUE;               /* holds if we need pcodes with line numbers */
BOOL hb_comp_bShortCuts = TRUE;                 /* .and. & .or. expressions shortcuts */
int  hb_comp_iWarnings = 0;                     /* enable parse warnings */
BOOL hb_comp_bAutoMemvarAssume = FALSE;         /* holds if undeclared variables are automatically assumed MEMVAR (-a)*/
BOOL hb_comp_bForceMemvars = FALSE;             /* holds if memvars are assumed when accesing undeclared variable (-v)*/
BOOL hb_comp_bDebugInfo = FALSE;                /* holds if generate debugger required info */
int  hb_comp_iExitLevel = HB_EXITLEVEL_DEFAULT; /* holds if there was any warning during the compilation process */

static jmp_buf s_env;

/* TODO: Extend the function to allow directives
         and external include files              */

/* TODO: This function should return an error code. The preprocessed sting
 * should be returned  by a reference.
 */
HB_FUNC( __PREPROCESS )
{
   if( ISCHAR( 1 ) )
   {
      char * pText = ( char * ) hb_xgrab( HB_PP_STR_SIZE );
      char * pOut = ( char * ) hb_xgrab( HB_PP_STR_SIZE );
      char * ptr = pText;

      int slen;

      hb_pp_Init();

      slen = HB_MIN( hb_parclen( 1 ), HB_PP_STR_SIZE - 1 );
      memcpy( pText, hb_parc( 1 ), slen );
      pText[ slen ] = 0; /* Preprocessor expects null-terminated string */
      memset( pOut, 0, HB_PP_STR_SIZE );

      HB_SKIPTABSPACES( ptr );

      if( setjmp( s_env ) == 0 )
      {
         int resParse;

         if( ( resParse = hb_pp_ParseExpression( ptr, pOut ) ) > 0 )
         {
            HB_SYMBOL_UNUSED( resParse );

            /* Some error here? */
         }

         hb_retc( pText ); /* Preprocessor returns parsed line in input buffer */
      }
      else
      {
         /* an error occured during parsing.
          * The longjmp was used in GenError()
          */
         hb_retc( "" );
      }

      hb_xfree( pText );
      hb_xfree( pOut );
   }
   else
      hb_retc( "" );
}

void hb_compGenError( char * szErrors[], char cPrefix, int iError, char * szError1, char * szError2 )
{
   PHB_ITEM pError;
   char buffer[ 128 ];

   HB_SYMBOL_UNUSED( cPrefix );

   HB_TRACE(HB_TR_DEBUG, ("GenError(%p, %c, %d, %s, %s)", szErrors, cPrefix, iError, szError1, szError2));

   /* TODO: The internal buffers allocated by the preprocessor should be
    * deallocated here
    */

   sprintf( buffer, szErrors[ iError - 1 ], szError1, szError2 );
   pError = hb_errRT_New( ES_ERROR, "PP", 9999, ( ULONG ) iError, buffer, NULL, 0, EF_NONE | EF_CANDEFAULT );
   hb_errLaunch( pError );
   hb_errRelease( pError );

   longjmp( s_env, iError );
}

void hb_compGenWarning( char * szWarnings[], char cPrefix, int iWarning, char * szWarning1, char * szWarning2 )
{
   HB_TRACE(HB_TR_DEBUG, ("GenWarning(%p, %c, %d, %s, %s)", szWarnings, cPrefix, iWarning, szWarning1, szWarning2));

   /* NOTE: All warnings are simply ignored */

   HB_SYMBOL_UNUSED( szWarnings );
   HB_SYMBOL_UNUSED( cPrefix );
   HB_SYMBOL_UNUSED( iWarning );
   HB_SYMBOL_UNUSED( szWarning1 );
   HB_SYMBOL_UNUSED( szWarning2 );
}