by Mike Parker (2 Submissions)
Category: Files/File Controls/Input/Output
Compatability: VB 6.0
Difficulty: Unknown Difficulty
Originally Published: Fri 14th September 2001
Date Added: Mon 8th February 2021
Rating: 
(1 Votes)
Simple routine to convert an ASCII file to an EBCDIC file.
VBcoders
'------------------------------------------------------------------------------------------------------------------------------
' Sub ConvertFile
'
' Inputs: None
'
' Returns: Nothing
'
' Comments: Perform the following steps:
' 1. Open the file to be converted
' 2. Open the file to store the converted data
' 3. Read 1 line at a time of the input file
' 4. Convert each character and add it to a string
' 5. Write the string to the output file
'
' The converted file will be sent to the IBM. Since the IBM prefers only capital letters, we convert the
' characters of the input file to upper case before doing the conversion.
'------------------------------------------------------------------------------------------------------------------------------
Dim intFileNum As Integer 'Used for opening the input file
Dim intFile2 As Integer 'Used for opening the output file
Dim strInput As String 'String to hold the data read from the input file
Dim strOutput As String 'String to hold the data written to the output file
Dim i As Integer 'Used as a counter
intFileNum = FreeFile
Open "c:\ftpibm.txt" For Input As #intFileNum
intFile2 = FreeFile
Open "c:\ftpibm.ebc" For Output As #intFile2
Do While Not EOF(intFileNum)
Input #intFileNum, strInput
For i = 1 To Len(strInput)
strOutput = strOutput & Chr(intConvert(Asc(UCase$(Mid$(strInput, i, 1)))))
Next
Print #intFile2, strOutput
Loop
Close #intFileNum
Close #intFile2
End Sub
Public Function intConvert(intChar As Integer)
'------------------------------------------------------------------------------------------------------------------------------
' Function intConvert
'
' Inputs: intChar - the Ascii value of a character being passed
'
' Returns: the equivalent EBCDIC value
'
' Comments: EBCDIC is the character set used by IBM. Not all ASCII characters are in EBCDIC (e.g. a comma).
'------------------------------------------------------------------------------------------------------------------------------
Select Case intChar
Case 32: intConvert = 64
Case 33: intConvert = 90
Case 34: intConvert = 127
Case 35: intConvert = 123
Case 36: intConvert = 91
Case 37: intConvert = 108
Case 39: intConvert = 125
Case 40: intConvert = 77
Case 41: intConvert = 93
Case 42: intConvert = 92
Case 43: intConvert = 78
Case 44: intConvert = 94
Case 45: intConvert = 96
Case 46: intConvert = 75
Case 47: intConvert = 97
Case 48 To 57: intConvert = intChar + 192
Case 58: intConvert = 122
Case 59: intConvert = 94
Case 60: intConvert = 76
Case 61: intConvert = 126
Case 62: intConvert = 110
Case 63: intConvert = 111
Case 64: intConvert = 124
Case 65 To 73: intConvert = intChar + 128
Case 74 To 82: intConvert = intChar + 135
Case 83 To 90: intConvert = intChar + 143
Case 91: intConvert = 192
Case 92: intConvert = 121
Case 93: intConvert = 208
Case 95: intConvert = 109
Case 96: intConvert = 95
Case 97 To 105: intConvert = intChar + 32
Case 106 To 114: intConvert = intChar + 39
Case 115 To 122: intConvert = intChar + 47
Case 123: intConvert = 192
Case 124: intConvert = 79
Case 125: intConvert = 208
Case 126: intConvert = 161
End Select
End Function
