What type of encoding is this

Question

1.00/5 (2 votes)

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Good Afternoon

I am trying to read a txt file with the following encoding: &3f9c9aaa

This converts to: 92.35
In the program it uses.

I am trying to read this value and post it on a scoreboard type system.
Any help would be kind

Thanks

What I have tried:

Asking programming friends. Googling stuff like hex, binary and assembly

Posted 2-May-16 3:16am

Captain-Price_ZA

Updated 14-Mar-17 9:40am

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Comments

OriginalGriff 2-May-16 9:56am

From one sample?
We can't tell.
What does the source for the other app do with it?

Sergey Alexandrovich Kryukov 2-May-16 9:57am

This is not "encoding"...
You don't show anything except a little fragment. What would be the point even to look at it?
—SA

Patrice T 2-May-16 10:18am

Impossible to tell from the single example;
Need more examples, at least.

2 solutions

Solution 1

I wonder if its as simple as (sorry, c#)

C#

string hexString = "43480170";
uint num = uint.Parse(hexString, System.Globalization.NumberStyles.AllowHexSpecifier);

byte[] floatVals = BitConverter.GetBytes(num);
float f = BitConverter.ToSingle(floatVals, 0);
Console.WriteLine("float convert = {0}", f);

// Output: 200.0056

from How to: Convert Between Hexadecimal Strings and Numeric Types (C# Programming Guide)[^] (4th example down)

Posted 2-May-16 4:09am

Garth J Lancaster

Comments

Jochen Arndt 2-May-16 10:34am

It is not the hex representation for the single precision value 92.35.
That would be 0x42B8B333 (and 0x3f9c9aaa is 1.22346997).

Captain-Price_ZA 2-May-16 10:59am

Thanks so much. Any idea what this might be? Please refer to my comment below

Jochen Arndt 2-May-16 11:04am

I have no idea. I just pointed out that it is not the binary representation of the mentioned single precision floating point value.

Captain-Price_ZA 2-May-16 11:12am

Okay, Thanks i am still noob but is there any way to convert this to the value because i am trying to make a leaderboard of these values and i need to convert them

Jochen Arndt 2-May-16 11:19am

You need to know how the value is encoded.
The & character and the used digits indicate that it is a 4 byte hex value. But only the author of the program will know how it is converted.

Captain-Price_ZA 2-May-16 11:26am

Thanks a lot for your help

Garth J Lancaster 2-May-16 21:47pm

thanks for disproving that - It was closed to midnight here and I'd shut down my Win machine

Captain-Price_ZA 2-May-16 10:38am

Thanks for the responce.
i have tried a hex to text converter but that does not seem to work Here is more example:

trophy : _nameless.0CA1.1E38 {
species: kudu
gender: bull
look: ""
variant: bull
african: true
scale: &3f9c9aaa
antlers: 2
antlers[0]: _nameless.0C9C.58A8
antlers[1]: _nameless.0C9C.58F8
antler_pair_score: _nameless.0CA0.EE68
weight: &441c7fa6
score: &42b8b2b4
points_factor: &3f9d9be8
used_cheat: false
kill_time_game: 44
kill_time_real: "05/02/2016 02:40 PM"
bag_time_game: 99
bag_time_real: "05/02/2016 02:41 PM"
weapon: "@@df_300_s@@"
scope: "@@df_s4_14@@"
kill_zone: "@@az_lungs@@"
shot_distance: &433d7bc4
pose: 0
hunter_name: "@@g_pp_unnamed@@"
total_shots_count: 5
total_hits_count: 2
hits: 2
hits[0]: _nameless.0CA1.1F70
hits[1]: _nameless.0CA1.2120
caption: "@@df_area_africa@@"

This is from a save where simple stuff like kill zone is saved normally where shot_distance is encoded (but i assume not in hex as i have tried converting)

Patrice T 2-May-16 11:22am

Use Improve question to update your question.

Patrice T 2-May-16 11:23am

Examples of coded values without the plain value will not help.

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Captain-Price_ZA · Accepted Answer · 2017-03-14T09:40:00

Hi All

Just to update any future users searching for this issue
I managed to solve it.
its a single precision floating point
IEEE 754

Here is the code i used
this: &433d7bc4
Translates to 189.48346

VB

Private Function ConvertHexToSingle(hexVal As String) As [Single]
    Try
        Dim i As Integer = 0, j As Integer = 0
        Dim bArray As Byte() = New Byte(3) {}
        'Dim new as String =

        For i = 0 To hexVal.Length - 1 Step 2
            bArray(j) = [Byte].Parse(hexVal(i).ToString() + hexVal(i + 1).ToString(), System.Globalization.NumberStyles.HexNumber)
            j += 1
        Next
        Array.Reverse(bArray)
        Dim s As [Single] = BitConverter.ToSingle(bArray, 0)
        Return (s)
    Catch ex As Exception
        Throw New FormatException("The supplied hex value is either empty or in an incorrect format. Use the " + "following format: 00000000", ex)
    End Try
End Function