Base64 calculation for extended ascii?

Question

As far as I know - base 64 can represent any char. ( inclduing binary)

Base64 encoding schemes are commonly used when there is a need to encode binary(!) data that need to be stored and transferred over media that are designed to deal with textual data

So I tried to apply it on extended ascii char ( beyond the 127)

the char :

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after following the simple algorithm :

I got to :

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so the value should be Fy

So why when I use online-encoder and put the value by alt+178 ,

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I get this result :

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What is going on here ?

I would guess the character is being encoded in UTF8 first, which will produce two bytes before base-64 encoding starts. — Damien_The_Unbeliever
@Damien_The_Unbeliever yeah , thanks I wrote the result if you want to see... — Royi Namir
base 64 can represent any byte. Your confusion is in getting from a char to byte(s) before the Base64. — Henk Holterman
@HenkHolterman Hi. the thing which I dont understand : byte can represent any value from 0-255. and the 178 is between this interval. so he actually needs 1 byte. why still he represent him as 3 bytes ? just because .net chr is unicode ? even so - according to msdn : msdn.microsoft.com/en-us/library/7sx7t66b(v=vs.100).aspx it says that it uses 2 bytes. so why vs shows me 3 bytes ? — Royi Namir
In memory, all chars are Unicode and 16 bits. The fun starts when Text is streamed. You always need an Encoding. With ANSI it will be 1 byte, with UTF8 a char can be 1-3 bytes. — Henk Holterman

zmbq zmbq · Accepted Answer · 2012-09-29T11:26:53

Your browser sent the encoding website the UTF-8 encoding of the character. This encoding is not 178.

Base64 calculation for extended ascii?

3 Answers