Friday, November 13, 2015

DBT to FPT Conversion

Recently, I had the opportunity to upgrade a software solution  created to run under MS/DOS using the DBF/DBT format to DBF/FPT to run under Windows 64 bits.

Found this piece of code written by Loren Scott and had it recompiled using Harbour 3.2

   DBT2FPT.PRG - Memo file converter by Loren Scott / SuccessWare 90, Inc.

   This is a simple program demonstrating how to convert Clipper .DBT's
   to FoxPro-compatible FPT's using the Clipper 5.2 DBFCDX RDD.

    Compile:  CLIPPER dbt2fpt /n/w
    Link   :  BLINKER FI dbt2fpt LIB dbfcdx,clipper


#include "RDDSYS.CH"


FUNC DBT2FPT( cOldFile, cNewFile )

LOCAL aFile := {}

cOldFile := Upper( AllTrim( cOldFile ))
cNewFile := Upper( AllTrim( cNewFile ))

IF "." $ cOldFile
  cOldFile := Left( cOldFile, at( ".", cOldFile )-1 )

IF "." $ cNewFile
  cNewFile := Left( cNewFile, at( ".", cNewFile )-1 )

// Display a message
//MWS 13/11/15 ? "DBT2FPT - Memo File Converter"
ALERT('DBT2FPT - Memo File Converter')
// Make sure we got the correct parameters
  ? "USAGE:  DBT2FPT "
  ? "where:   = Name of the database containing the memo"
  ? "                    field to convert."
  ? "         = New file to create"

// Check for the original file
IF !File( cOldFile + ".DBF" )
  ? "Cannot find " + cOldFile + "!"

// Open the original file (using DBFNTX)

// Set DBFCDX Driver as the default for creating new dbf

// Show that we're doing something
? "Working"

// Now copy to the new file (with nifty UDF)
COPY TO (cNewFile) FOR ShowDot()

// Look, we made it!
//MWS 13/11/15 ?? "Done!"
ALERT('Success !')
// Clean up before leaving

// Compare file sizes
aFile := Directory( cOldFile + ".DBT" )
? PadR( "Old " + cOldFile + ".DBT Size",21 ) + ": "
?? Str( aFile[1,2] ) + " bytes"
aFile := Directory( cNewFile + ".FPT" )
? PadR( "New " + cNewFile + ".FPT Size",21 ) + ": "
?? Str( aFile[1,2] ) + " bytes"


FUNC ShowDot()
  ?? "."
Return (.T.)

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