Re: How to know whether a file's encoding is ansi or utf8?

[Sam Hu via Digitalmars-d-learn]

On Tuesday, 22 July 2014 at 11:59:34 UTC, Alexandre wrote:

Read the BOM ?

module main;

import std.stdio;

enum Encoding
{
        UTF7,
        UTF8,
        UTF32,
        Unicode,
        BigEndianUnicode,
        ASCII
};

Encoding GetFileEncoding(string fileName)
{
        import std.file;
        auto bom = cast(ubyte[]) read(fileName, 4);

        if (bom[0] == 0x2b && bom[1] == 0x2f && bom[2] == 0x76)
                return Encoding.UTF7;
        if (bom[0] == 0xef && bom[1] == 0xbb && bom[2] == 0xbf)
                return Encoding.UTF8;
        if (bom[0] == 0xff && bom[1] == 0xfe)
                return Encoding.Unicode; //UTF-16LE
        if (bom[0] == 0xfe && bom[1] == 0xff)
                return Encoding.BigEndianUnicode; //UTF-16BE

if (bom[0] == 0 && bom[1] == 0 && bom[2] == 0xfe && bom[3] == 0xff)

                return Encoding.UTF32;

        return Encoding.ASCII;
}

void main(string[] args)
{
        if(GetFileEncoding("test.txt") == Encoding.UTF8)
                writeln("The file is UTF8");
        else
                writeln("File is not UTF8 :(");
}



On Tuesday, 22 July 2014 at 09:50:00 UTC, Sam Hu wrote:

Greetings!

As subjected,how can I know whether a file is in UTF8 encoding or ansi?

Thanks for the help in advance.

Regards,
Sam

Thanks. This is exactly what I want at this moment.