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votes: 10

ID: 449
Viewed: 2825
Added: Aug 19, 2002
Version:
Snippet uploaded by: snippet
Written By: Clint LaFever
Demo: Sorry, no demo



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Code to be used with delimited strings. Functions to count the number of substrings [tokens] and to retrieve the tokens from the delimited string are provided.

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<!---Declaration--->
'------------------------------------------------------------ 
' Author: Clint M. LaFever [clint.m.lafever@cpmx.saic.com]
' Purpose: Gets the first token off a delimited string.
' Returns the token and changes the passed string
' with the first token removed.
' Parameters: delimited string and delimiter
' Returns: First Token off delimited string
'------------------------------------------------------------

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<!---Code--->

Function GetToken(sSource As String, ByVal sDelim As String) As String
Dim iDelimPos As Integer
On Error GoTo ErrorGetToken
'------------------------------------------------------------
' Find the first delimiter
'------------------------------------------------------------
iDelimPos = InStr(1, sSource, sDelim)
'------------------------------------------------------------
' If no delimiter was found, return the existing
' string and set the source to an empty string.
'------------------------------------------------------------
If (iDelimPos = 0) Then
GetToken = Trim$(sSource)
sSource = ""
'------------------------------------------------------------
' Otherwise, return everything to the left of the
' delimiter and return the source string with it
' removed.
'------------------------------------------------------------
Else
GetToken = Trim$(Left$(sSource, iDelimPos - 1))
sSource = Mid$(sSource, iDelimPos + 1)
End If
Exit Function
ErrorGetToken:
MsgBox Err & ":Error in GetToken() Function. Error Message:" & Error(Err), 48, "Warning"
Exit Function
End Function
'------------------------------------------------------------
' Author: Clint M. LaFever [clint.m.lafever@cpmx.saic.com]
' Purpose: Counts the number of tokens that are in a delimited ' string. ' Parameters: delimited string and delimiter
' Returns: Number of tokens.
'------------------------------------------------------------
Function CountTokens(ByVal sSource As String, ByVal sDelim As String) As Integer
Dim iDelimPos As Integer
Dim iCount As Integer
On Error GoTo ErrorCountTokens
'------------------------------------------------------------
' Number of tokens = 0 if the source string is ' empty
'------------------------------------------------------------
If sSource = "" Then CountTokens = 0
'------------------------------------------------------------
' Otherwise number of tokens = number of delimiters
' 1
'------------------------------------------------------------
Else
iDelimPos = InStr(1, sSource, sDelim)
Do Until iDelimPos = 0
iCount = iCount + 1
iDelimPos = InStr(iDelimPos + 1, sSource, sDelim)
Loop
CountTokens = iCount + 1
End If
Exit Function
ErrorCountTokens:
MsgBox Err & ":Error in CountTokens() Function. Error Message:" & Error(Err), 48, "Warning"
Exit Function
End Function
;


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