Contents
Why is UTF-8 a good choice for the default editor encoding?
As a content author or developer, you should nowadays always choose the UTF-8 character encoding for your content or data. This Unicode encoding is a good choice because you can use a single character encoding to handle any character you are likely to need. This greatly simplifies things.
Is UTF-8 backwards compatible with ASCII?
Each character is represented by one to four bytes. UTF-8 is backward-compatible with ASCII and can represent any standard Unicode character. The first 128 UTF-8 characters precisely match the first 128 ASCII characters (numbered 0-127), meaning that existing ASCII text is already valid UTF-8.
Do you have to convert ASCII files to UTF-8?
However, when you start dealing with characters beyond the first 128, your are no longer UTF-8 equivalent at the byte level, and you must do a conversion if you want your “extended ASCII” file to be UTF-8 encoded. One lesson I learned today is that we can’t trust file to always give correct interpretation of a file’s character encoding.
Is the first 128 characters of a text file the same as ASCII?
UTF-8 encoding uses the same encoding as 7-bit ASCII for its first 128 characters. So a text file that only contains characters from that range of the first 128 characters will be identical at a byte level whether encoded with UTF-8 or 7-bit ASCII. Codepage layout.
Why was the UTF-8 encoding scheme so popular?
It preserved the one-byte ASCII characters and provided a multibyte extension that allowed characters to be represented by zero, one, two or three additional bytes. The number of additional bytes was given in the high-order bits of the leading byte. The encoding scheme was an instant success and grew rapidly in popularity.
When do UTF-8 and extended ASCII collision occur?
While there are many ways to botch character set encoding, as a practical matter these errors almost always arise when Extended-ASCIIdata and UTF-8data are intermixed. Extended-ASCII and UTF-8 collisions are becoming more and more common as UTF-8 encoding becomes the preferred form.