why doesn’t reinterpret_cast handle that for me? One reason is that the size, alignment, and bit representations aren’t specified, so such a conversion wouldn’t be portable. However, that wouldn’t really justify making the behaviour undefined, just implementation-defined. By making it undefined, the compiler is allowed to assume that expressions of unrelated types don’t access the … Read more
Here’s an example of doing it the first way that Patrick mentioned: convert the bitstring to an int and take 8 bits at a time. The natural way to do that generates the bytes in reverse order. To get the bytes back into the proper order I use extended slice notation on the bytearray with … Read more
Python’s string format method can take a format spec. >>> “{0:b}”.format(37) ‘100101’ Format spec docs for Python 2 Format spec docs for Python 3
I believe the code you are looking for is: $byteArray = unpack(“N*”,file_get_contents($filename)); UPDATE: Working code supplied by OP $filename = “myFile.sav”; $handle = fopen($filename, “rb”); $fsize = filesize($filename); $contents = fread($handle, $fsize); $byteArray = unpack(“N*”,$contents); print_r($byteArray); for($n = 0; $n < 16; $n++) { echo $byteArray [$n].'<br/>’; }
It’s represented in binary (base 2). Read more about number bases. In base 2 you only need 2 different symbols to represent a number. We usually use the symbols 0 and 1. In our usual base we use 10 different symbols to represent all the numbers, 0, 1, 2, … 8, and 9. For comparison, … Read more
bool is a built-in basic type in C#. Any underlying representation would be an implementation detail. The C# 4.0 Language Specification states in section 4.1.8: The bool type represents boolean logical quantities. The possible values of type bool are true and false. No standard conversions exist between bool and other types. In particular, the bool … Read more
Yes, the OID is encoded in the binary data. The OID 1.3.6.1.5.5.7.48.1 you mention becomes 2b 06 01 05 05 07 30 01 (the first two numbers are encoded in a single byte, all remaining numbers are encoded in a single bytes as well because they’re all smaller than 128). A nice description of OID … Read more
Just to make sure we’re on the same page, G is the most significant bit of the three, R comes next and S can be thought of as the least significant bit because its value partially represents the even less significant bits that have been truncated in the calculations. These three bits are only used … Read more
As of PHP 5.4+ the prefix for binary number is: 0b For ealier version, there is no such prefix. Instead, you can use 0x, for hexadecimal. For more informations, see the Integers section of the PHP manual. Still, if you really need to write values using binary before PHP 5.4, you can use the bindec … Read more
There’s no guaranteed way, but here are a couple of possibilities: Look for a header on the file. Unfortunately, headers are file-specific, so while you might be able to find out that it’s a RAR file, you won’t get the more generic answer of whether it’s text or binary. Count the number of character vs. … Read more