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Old 30th December 2011, 22:38   #1  |  Link
vampiredom
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Join Date: Aug 2008
Posts: 233
ord() | Return the ASCII value of a character

Here is a useful function I wrote for returning to ASCII value of a character, like the reverse of chr()

Note that AviSynth seems to ignore CHR(0) in strings ... A blank string will always return 0.

Code:
# requires Gscript.dll
global __ord_ASCII__ = ""

function ord(string c) {
        c = LeftStr(c,1)
        
        Gscript("""
        if (__ord_ASCII__ == "") {
                for (i=1, 255, 1) {
                        global __ord_ASCII__ = __ord_ASCII__ + chr(i)
                }
        }
        """)
        
        return (c == "") ? 0 : FindStr(__ord_ASCII__, c)
}

Last edited by vampiredom; 30th December 2011 at 23:19.
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Old 30th December 2011, 23:04   #2  |  Link
Gavino
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Join Date: Dec 2007
Location: Spain
Posts: 3,433
Quote:
Originally Posted by vampiredom View Post
Code:
global __ord_ASCII__ = ""
...
        if (__ord_ASCII__ == "") {
                for (i=1, 255, 1) {
                        __ord_ASCII__ = __ord_ASCII__ + chr(i)
                }
        }
This assignment is setting a local variable, so the loop will be redone on each call. Should be:
Code:
                        global __ord_ASCII__ = __ord_ASCII__ + chr(i)
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Old 30th December 2011, 23:19   #3  |  Link
vampiredom
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Posts: 233
Oops! Fixed. Thanks. [without that, it would kind of defeat the whole reason I wrote the function this way, wouldn't it? ]

Last edited by vampiredom; 31st December 2011 at 03:15.
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