The struct.pack() function allows converting integers of up to 64 bit to byte strings. What's the most efficient way to pack an even larger integer? I'd rather not add a dependency on non-standard modules like PyCrypto (which provides num_to_bytes()). ...
Going through some of my older Delphi projects and upgrading them to D2009, as I find this version a great improvement (Generics.Collections - wow! ;)) to all previous releases, I encounter various problems. This one I managed to solve but the solution does not seem half as elegant as I believe it could be. (Note, I haven't written Delph...
I am sending and receiving binary data to/from a device in packets (64 byte). The data has a specific format, parts of which vary with different request / response. Now I am designing an interpreter for the received data. Simply reading the data by positions is OK, but doesn't look that cool when I have a dozen different response forma...
I am writing a decryption class (AES/CBC/PKCS7Padding) where the encrypted data is coming from C#. I want to take the following string (which is base64 encoded): usiTyri3/gPJJ0F6Kj9qYL0w/zXiUAEcslUH6/zVIjs= and convert it to a byte array in java to pass into the SecretKeySpec as the key. I know there is the issue of C# having unsigned ...
How can create a byte array in objective c programming ... i have the data that is "0x12,0x23,0x34,0x45,0x56,0x67,0x78,0x89,0x12,0x23,0x34,0x45,0x56,0x67,0x78,0x89" i want it prepare as a byte array... pls help me.. ... if anybody have any sample project.. pls give me... ...
I have a byte array initialised like this: public static byte[] tmpIV = {0x43, (byte)0x6d, 0x22, (byte)0x9a, 0x22, (byte)0xf8, (byte)0xcf, (byte)0xfe, 0x15, 0x21, (byte)0x0b, 0x38, 0x01, (byte)0xa7, (byte)0xfc, 0x0e}; If I print it it gives me 67 109 34 -102 34 -8...
I know that I can assign a value specifically to a float by doing float y = 4.5f; I want to do the same thing, except as a byte. How do I do this? I've checked the MSDN documentation and cannot find anything related to this. Also, what is this called? Thanks, [Edit] For clarity the code I'm using this on is byte myByte = a==b?1:0;...
Hello, I'm trying to insert a single bit into an array of bytes, which would shift all the bits in the byte array to the left. Say I have a Java byte array as follows: byte[] byteArray = new byte[2]; byteArray[0] = 0x11 byteArray[1] = 0x00 In binary, this byte array represented as: 0001 0001 0000 0000 Now I want to insert a zero ...
In Python, I'm constantly using the following sequence to get an integer value from a byte buffer (in python this is a str). I'm getting the buffer from the struct.unpack() routine. When I unpack a 'char' using byte_buffer, = struct.unpack('c', raw_buffer) int_value = int( byte_buffer.encode('hex'), 16 ) Is there a better way? ...
I have to following code in VS2008 .net 3.5 using WinForms: byte percent = 70; byte zero = 0; Bitmap copy = (Bitmap)image1.Clone(); ... Color oColor = copy.GetPixel(x, y); byte oR = (byte)(oColor.R - percent < zero ? zero : oColor.R - percent); When I leave the "(byte)" off the last line of code, I get a compiler error saying it "Ca...
I have a function which extracts a file into a byte array (data). int contentLength = postedFile.ContentLength; byte[] data = new byte[contentLength]; postedFile.InputStream.Read(data, 0, contentLength); Later I use this byte array to construct an System.Drawing.Image object (where data is the byte array) ...
Hi, I'm working with java. I have a byte array (8 bits in each position of the array) and what I need to do is to put together 2 of the values of the array and get a value. I'll try to explain myself better; I'm extracting audio data from a audio file. This data is stored in a byte array. Each audio sample has a size of 16 bits. If t...
I would like to build a string from a byte value. I currently use: str = " " str[0] = byte This seems to work fine but I find it ugly and not very scalable to strings longer than 1 character. Any idea? ...
I have an array: $arr[0] = 95 $arr[1] = 8 $arr[2] = 0 $arr[3] = 0 That are bytes. I need a DWORD. I tried: $dword = $arr[0]+$arr[1]*265+$arr[2]*265*265+$arr[3]*265*265*265; Is that right or am I doing it wrong? ...
Hi; While using a MemoryStream, I find myself often copying (hence duplicating) data to a temporary array of bytes. I think it's a little bit of a waste of ressource, because MemoryStream dosen't let you directly access the underlying byte array. In this situation, what's the real advantage of a MemoryStream? I have read somewhere tha...
In C# (3.5) I try the following: byte byte1 = 0x00; byte byte2 = 0x00; byte byte3 = byte1 & byte2; and I get Error 132: "Cannot implicitly convert type 'int' to 'byte'. An explicit conversion exists (are you missing a cast?)". The same happens with | and ^. What am I doing wrong? Why is it asking me about ints? Why can't I do bool...
I have a byte array that contains 6 bytes last 2 represents the port number while searching for a way two convert these last to bytes to a port number i have come across this snippet, int port = 0; port |= peerList[i+4] port <<= 8; port |= peerList[i+5] it works but i need some clarification as to how it w...
Hi I am want to take advantage of the web optimization for pdfs by allowing users to download them a page at a time. The pdfs are configured for fast web view. I am serving the pdfs from sql server 2008. The c# .net 3.5 web app untilises linq to SQL to load the files into a binary array from the database. The file is opended in PDF ...
How can i iterate bits in a byte array? ...
In one of my previous questions I asked how to take a screenshot and save it as JPEG without the use of GDI+ due to the constrains of having to use only C. At the end I answered the question myself with the help of of some of the comments there. Using a very terse C version of GDI+ (loaded at runtime) i can take a screenshot and save it...