20000121 12:50 GMT+1 Ignacio Ortiz <ignacio@fivetech.com> MlPos() function

2000-01-21 11:56:51 +00:00
parent c1edfbcdbe
commit bd2646639e
1 changed files with 105 additions and 0 deletions
--- a/harbour/source/rtl/mlpos.c
+++ b/harbour/source/rtl/mlpos.c
@@ -0,0 +1,105 @@
+/*
+ * Harbour Project source code:
+ * MLPOS() function
+ *
+ * Copyright 2000 Ignacio Ortiz de Z£niga <ignacio@fivetech.com>
+ * 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/).
+ *
+ */
+
+#include "extend.h"
+
+HARBOUR HB_MLPOS( void )
+{
+   char * pszString    = hb_parc( 1 );
+   ULONG  ulLineLength = hb_parni( 2 );
+   ULONG  ulLine       = hb_parni( 3 );
+   ULONG  ulTabLength  = ISNUM( 4 ) ? hb_parni( 4 ) : 4;
+   ULONG  ulLastSpace  = 0;
+   ULONG  ulCurLength  = 0;
+   ULONG  ulLen        = hb_parclen( 1 );
+   ULONG  ulLines      = 1;
+   ULONG  ulPos        = 0;
+   BOOL   bWordWrap    = ISLOG( 5 ) ? hb_parl( 5 ) : TRUE;
+
+   if( ulLineLength < 4 || ulLineLength > 254 )
+      ulLineLength = 79;
+
+   if( ulTabLength > ulLineLength )
+      ulTabLength = ulLineLength - 1;
+
+   while( ulPos < ulLen && ulLines < ulLine )
+   {
+      switch( pszString[ ulPos ] )
+      {
+         case HB_CHAR_HT:
+            ulCurLength = ( ( ULONG ) ( ulCurLength / ulTabLength ) * ulTabLength ) + ulTabLength;
+            break;
+
+         case HB_CHAR_LF:
+            ulCurLength = 0;
+            ulLastSpace = 0;
+            ulLines++;
+            break;
+
+         case HB_CHAR_CR:
+            break;
+
+         case ' ':
+            ulCurLength++;
+            ulLastSpace = ulCurLength;
+            break;
+
+         default:
+            ulCurLength++;
+      }
+
+      if( ulCurLength > ulLineLength )
+      {
+         if( bWordWrap )
+         {
+            if( ulLastSpace == 0 )
+               ulCurLength = 1;
+            else
+               ulCurLength = ulCurLength - ulLastSpace;
+         }
+         else
+            ulCurLength = 1;
+
+         ulLines++;
+         ulLastSpace = 0;
+      }
+
+      ulPos++;
+   }
+
+   if( ulCurLength > 0 )
+      ulLines++;
+
+   if( ulLines == ulLine )
+      hb_retnl( ulPos - ulCurLength + 1);
+   else
+      hb_retnl( ulLen );
+}