/*
 * $Id$
 */

/*
 * Harbour Project source code:
 * Preprocessor & Compiler integration module
 *
 * Copyright 1999 Alexander S.Kresin <alex@belacy.belgorod.su>
 * 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, or (at your option)
 * any later version.
 *
 * 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 software; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307 USA (or visit the web site http://www.gnu.org/).
 *
 * As a special exception, the Harbour Project gives permission for
 * additional uses of the text contained in its release of Harbour.
 *
 * The exception is that, if you link the Harbour libraries 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 Harbour library code into it.
 *
 * This exception does not however invalidate any other reasons why
 * the executable file might be covered by the GNU General Public License.
 *
 * This exception applies only to the code released by the Harbour
 * Project under the name Harbour.  If you copy code from other
 * Harbour Project or Free Software Foundation releases into a copy of
 * Harbour, as the General Public License permits, the exception does
 * not apply to the code that you add in this way.  To avoid misleading
 * anyone as to the status of such modified files, you must delete
 * this exception notice from them.
 *
 * If you write modifications of your own for Harbour, it is your choice
 * whether to permit this exception to apply to your modifications.
 * If you do not wish that, delete this exception notice.
 *
 */

/*
 * 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 <stdlib.h>
#include <string.h>

#include "hbpp.h"
#include "hbcomp.h"

BOOL hb_pp_bInline = FALSE;

static char s_szLine[ HB_PP_STR_SIZE ];
static char s_szOutLine[ HB_PP_STR_SIZE ];
int hb_pp_LastOutLine = 1;

/*
BOOL bDebug = FALSE;
*/

extern void CloseInclude( void );

int hb_pp_Internal( FILE * handl_o, char * sOut )
{
  PFILE pFile;
  char * ptr, * ptrOut, * tmpPtr;
  int lContinue;
  int lens, rdlen;
  int lLine = 0;

  HB_TRACE(HB_TR_DEBUG, ("hb_pp_Internal(%p, %s)", handl_o, sOut));

  while( TRUE )
  {
     pFile = hb_comp_files.pLast;
     lens = lContinue = 0;
     ptrOut = sOut;
     while( ( rdlen = hb_pp_RdStr( pFile->handle, s_szLine + lens, HB_PP_STR_SIZE -
                  lens, lContinue, ( char * ) pFile->pBuffer, &( pFile->lenBuffer ),
                  &( pFile->iBuffer ) ) ) >= 0 )
     {
        lens += rdlen;
        hb_comp_iLine ++;

        if( lens >= HB_PP_STR_SIZE )
        {
           hb_compGenError( hb_pp_szErrors, 'F', HB_PP_ERR_BUFFER_OVERFLOW, NULL, NULL );
        }

        if( hb_pp_bInline )
        {
           break;
        }

        if( s_szLine[ lens - 1 ] == ';' )
        {
           lContinue = 1;
           lens--;
           lens--;
           while( s_szLine[ lens ] == ' ' || s_szLine[ lens ] == '\t' ) lens--;
           s_szLine[ ++lens ] = ' ';
           s_szLine[ ++lens ] = '\0';
        }
        else
        {
           lContinue = 0;
           lens = 0;
        }

        if( !lContinue )
        {
           if( *s_szLine != '\0' )
           {
              ptr = s_szLine;
              HB_SKIPTABSPACES( ptr );

              if( *ptr == '#' )
              {
                 hb_pp_ParseDirective( ptr + 1 );

                 if( pFile != hb_comp_files.pLast )
                 {
                    pFile = ( PFILE ) ( ( PFILE ) hb_comp_files.pLast )->pPrev;

                    if( lLine )
                       sprintf( s_szLine, "#line %d \"%s\"\n", pFile->iLine, pFile->szFileName );
                    else
                       *s_szLine = '\0';

                    lLine = 0;
                    sprintf( s_szLine + strlen(s_szLine), "#line 1 \"%s\"", hb_comp_files.pLast->szFileName );
                 }
                 else
                    *s_szLine = '\0';
              }
              else
              {
                 if( *ptr == '\0' )
                 {
                    if( hb_comp_files.iFiles == 1 )
                       *s_szLine = '\0';
                    else
                       continue;
                 }
                 else
                 {
                    if( hb_pp_nCondCompile == 0 || hb_pp_aCondCompile[ hb_pp_nCondCompile - 1 ] )
                    {
                       /* Ron Pinkas removed 2001-01-20
                       if( ( hb_pp_LastOutLine < hb_comp_iLine - 1 ) && hb_comp_files.iFiles == 1 && handl_o )
                          for( ; hb_pp_LastOutLine < hb_comp_iLine-1; hb_pp_LastOutLine++ )
                             hb_pp_WrStr( handl_o, "\n" );
                       hb_pp_LastOutLine = hb_comp_iLine;
                       */
                       hb_pp_ParseExpression( ptr, s_szOutLine );
                    }
                    else
                       *s_szLine = '\0';
                 }
              }
           }

           break;
        }
     }

     if( rdlen < 0 )
     {
        if( hb_comp_files.iFiles == 1 )
           return 0;      /* we have reached the main EOF */
        else
        {
           CloseInclude();
           lLine = 1;
        }

        /* Ron Pinkas added 2000-06-22 */
        s_szLine[0] = '\0';
        break;
       /* Ron Pinkas end 2000-06-22 */
     }

     if( *s_szLine ) break;
  }

  if( lLine )
  {
     if( hb_comp_files.iFiles == 1 )
        hb_pp_LastOutLine = hb_comp_iLine;

     sprintf( ptrOut, "#line %d \"%s\"", ( hb_comp_files.pLast->iLine ) , hb_comp_files.pLast->szFileName );

     while( *ptrOut ) ptrOut++;

     /* Ron Pinkas added 2000-06-14 */
     tmpPtr = s_szLine;
     HB_SKIPTABSPACES( tmpPtr );

     /* Last Opened file ended without CR - adding CR to the #line directive. */
     if( *tmpPtr != '\0' )
     {
        *ptrOut++ = '\n';
        *ptrOut = '\0';
     }
     /* Ron Pinkas end 2000-06-14 */
  }
  else
  {
     /* Ron Pinkas added 2000-06-13 */
        /* Ignore empty lines in #included files. */
     /* Ron Pinkas removed 2001-01-20 */
     #if 0
     if( ( hb_pp_LastOutLine != hb_comp_iLine ) && hb_comp_files.iFiles == 1 && handl_o )
     /* Ron Pinkas end 2000-06-13 */
        for( ; hb_pp_LastOutLine < hb_comp_iLine; hb_pp_LastOutLine++ )
            hb_pp_WrStr( handl_o, "\n" );
    #endif
    /* END Ron Pinkas removed 2001-01-20 */
  }

  lens = hb_pp_strocpy( ptrOut, s_szLine ) + ( ptrOut - sOut );

  *( sOut + lens++ ) = '\n';
  *( sOut + lens ) = '\0';

  if( hb_comp_iLineINLINE && hb_pp_bInline == 0 )
  {
     hb_comp_iLine = hb_comp_iLinePRG + ( hb_comp_iLine - hb_comp_iLineINLINE );
     #ifndef SIMPLEX
        hb_comp_iLine++;
     #endif
     hb_comp_iLineINLINE = 0;
  }

  if( handl_o )
  {
     hb_pp_WrStr( handl_o, sOut );
  }

  #if 0
     printf( "%d : %s\n", hb_comp_iLine, sOut );
  #endif

  return lens;
}

int hb_pp_ReadRules( void )
{
  PFILE pFile;
  char * ptr;
  int lContinue;
  int lens, rdlen;

  HB_TRACE(HB_TR_DEBUG, ("hb_pp_ReadRules()"));

  while( TRUE )
  {
     pFile = hb_comp_files.pLast;
     lens = lContinue = 0;
     while( ( rdlen = hb_pp_RdStr( pFile->handle, s_szLine + lens, HB_PP_STR_SIZE -
                  lens, lContinue, ( char * ) pFile->pBuffer, &( pFile->lenBuffer ),
                  &( pFile->iBuffer ) ) ) >= 0 )
     {
        lens += rdlen;
        hb_comp_iLine++;

        if( s_szLine[ lens - 1 ] == ';' )
        {
           lContinue = 1;
           lens--;
           lens--;
           while( s_szLine[ lens ] == ' ' || s_szLine[ lens ] == '\t' ) lens--;
           s_szLine[ ++lens ] = ' ';
           s_szLine[ ++lens ] = '\0';
        }
        else
        {
           lContinue = 0;
           lens = 0;
        }

        if( ! lContinue )
        {
           if( *s_szLine != '\0' )
           {
              ptr = s_szLine;
              HB_SKIPTABSPACES( ptr );

              if( *ptr == '#' )
              {
                 hb_pp_ParseDirective( ptr + 1 );
              }

              *s_szLine = '\0';
           }

           break;
        }
     }

     if( rdlen < 0 )
     {
        if( hb_comp_files.iFiles == 1 )
        {
           return 0;      /* we have reached the main EOF */
        }
        else
        {
           CloseInclude();
           hb_pp_LastOutLine = hb_comp_iLine;
        }

        *s_szLine = '\0';
     }
  }
}