How can I make a function that reads binary data into a structure?
How can I make a C++ function that reads a binary file, 128 bytes at a time, and loads each 128 bytes into a struct, and then makes a collection of those structs that can be used in a C# class? In other words, I want to be able to call this C++ function from C#.
Table of Contents
How is the struct module used in Python?
In Python, the struct module is used to read and save packed binary data. This module contains a number of methods that allow you to get an object packed in a specific format string. You can read more about the struct module methods here. Before using the struct module, you must connect it with the directive
Can a structure be declared in both C++ and C#?
In general, you should define the struct/array in C++ and then provide an equivalent C# definition that will allow the struct to “sort” between the two. For example, if you wanted to pass a RECT back and forth between C++ and C#, you could declare it in C# like this:
How to store a text file in an array of structures?
The main function should pass an array of name structures to loadNames so that it can simply read the data from one line in the structure into the first element of this array, then read the data from the second line into the second element, etc. This must be done for all 4429 lines of the names.txt file.
How to write an array to a file?
The function takes an array data structure, its size, and the filename as parameters. Creates a new file based on the name you specify, then first writes the size of the array as an int, then loops through the entire array, visiting each structure and writing its members (name and value) to the file.
How to write an object to a binary file?
C++ program to write and read an object to/from a binary file 1 file_stream_object.open() – to open the file 2 file_stream_object.close() – to close the file 3 file_stream_object.write() – to write an object to the file 4 file_stream_object.read() – to read the object from the file More
How to assign a structure to a block of memory?
– C / C++ Assignment of a structure to a memory block…. contains structured data. If I assign the structure to the memory block, am I worried that the compiler will pad the structure? contains structured data. If I assign the structure to the memory block, am I worried that the compiler will pad the structure?
How are keys stored in a C++ Map?
The C++ map stores the keys in an ordered way (note that internally it uses a self-balancing binary search tree). The sorting is done internally using the ” < ” operator. So if we use our own data type as the key, we must overload this operator for our data type.
Can a C_Int field be a 7-byte field?
For fields of type integer like c_int, an optional third element can be given. It must be a small positive integer that defines the bit width of the field. So for (“more_funky_numbers_7bytes”, c_uint, 56), I tried to define the field as a 7-byte field, but I get the error:
Is it bad to read a binary file into a struct?
Reading directly into structures is bad: many C programs have crashed due to different byte ordering, different field compiler implementations, packing, word size… It’s best to serialize and deserialize byte by byte. Use the built in stuff if you want or just get used to BinaryReader.
How to read a file into a structure?
If this happened, it would see the value 56 in the first character, then read the next n bytes in the padding, and then read the next 2 in the short. If the second byte was lost as padding, the next 2 bytes are read into the short.
How does struct interpret bytes as packed binary data?
The byte order character ‘=’ chooses to use big-endian or little-endian ordering depending on the host system. The struct module does not interpret this as a native sort, so the ‘P’ format is not available. The IEEE 754 binary16 “half-precision” type was introduced in the 2008 revision of the IEEE 754 standard.