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I'm doing a lot of string manipulation in C#, and really need the strings to be stored one byte per character. This is because I need gigabytes of text simultaneously in memory and it's causing low memory issues. I know for certain that this text will never contain non-ASCII characters, so for my purposes, the fact that System.String and System.Char store everything as two bytes per character is both unnecessary and a real problem.
I'm about to start coding my own CharAscii and StringAscii classes - the string one will basically hold its data as byte[], and expose string manipulation methods similar to the ones that System.String does. However this seems a lot of work to do something that seems like a very standard problem, so I'm really posting here to check that there isn't already an easier solution. Is there for example some way I can make System.String internally store data as UTF8 that I haven't noticed, or some other way round the problem?
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In order to convert a String into UTF-8, we use the getBytes() method in Java. The getBytes() method encodes a String into a sequence of bytes and returns a byte array. where charsetName is the specific charset by which the String is encoded into an array of bytes.
As far as I know, the standard C's char data type is ASCII, 1 byte (8 bits).
Both std::string and std::wstring must use UTF encoding to represent Unicode. On macOS specifically, std::string is UTF-8 (8-bit code units), and std::wstring is UTF-32 (32-bit code units); note that the size of wchar_t is platform-dependent.
UTF-8 encodes a character into a binary string of one, two, three, or four bytes. UTF-16 encodes a Unicode character into a string of either two or four bytes. This distinction is evident from their names. In UTF-8, the smallest binary representation of a character is one byte, or eight bits.
Well, you could create a wrapper that retrieves the data as UTF-8 bytes and converts pieces as needed to System.String, then vice-versa to push the string back out to memory. The Encoding class will help you out here:
var utf8 = Encoding.UTF8; byte[] utfBytes = utf8.GetBytes(myString); var myReturnedString = utf8.GetString(utfBytes); If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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