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- !Windows Commandline Tricks
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- Validate WIL Variable Name
- Validating Password
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Validate WIL Variable Name
Keywords: Validate WIL Variable Name Var Substitution StrClean Reserved Keyword 3074 Expression Continues Past Expected End 3054 Unrecognizable Item Found on Line 3055 Variable Name Over 30 Characters Too Long
Question:
I need to validate commandline input. The user passes a parameter that is used as a WIL variable, using variable subtitution. How can I confirm the user input a Valid WIL variable name?Answer:
There are rules about which varaible names can be used.- Variable length (name of variable) limited to 30 characters.
- All WinBatch variables MUST start with an alphabetic character.
- May contain but not start with numeric digits.
- May not be a reserved keyword.
You should also add code to confirm the user is not passing a restricted keyword ( For, Select, Pause etc). The WIL.CLR file contains a list of functions and keywords.
input = 'abc' ; ok
;input = '1abc' ; bad - remove int as first charater
;input = 'abc?' ; bad - replace ? with _
;input = 'abcdefghijklmnopqrstuvwxyz0123456789' ; bad - to many chars, truncate to 30
;input = 'Pause' ; bad - function name
;input = 'Select' ; bad - keyword name
; Don't allow first character to be a number, remove if found
If IsInt(StrSub( input, 1, 1 )) Then input = StrSub( input, 2, -1 )
; Replace all non-var characters with underscore
alpha="abcdefghijklmnopqrstuvwxyz0123456789@_" ; allowed
; Truncate length to 30 characters
input = StrSub( input, 1, 30 )
input = StrClean( input, alpha, "_", @FALSE, 2 )
;Confirm its not a keyword, if so append a leading underscore
clrfile = DirHome() : "wil.clr"
flag = IniReadPvt( "keywords", input, 0, clrfile )
If flag != 0 Then input = '_':input
%input% = 'hello world'
Pause('Variable : ', %input% )
Exit
Article ID: W17951
Filename: Validate WIL Variable Name.txt
File Created: 2013:02:26:10:40:50
Last Updated: 2013:02:26:10:40:50