codeautopilot[bot]
commented
1 year ago Based on the analysis of the Rust function write_vtable, here's how you can rewrite it in C++.
First, you need to create a C++ equivalent for the Vtable struct. In Rust, a struct is similar to a class in C++. So, you can create a class Vtable in C++ like this:
class Vtable {
public:
std::string address;
std::vector<char> binary_contents;
};Next, you can rewrite the write_vtable function in C++. Here's a basic outline of how the function might look:
#include <fstream>
#include <vector>
void write_vtable(const char* bolted_binary_path, const char* output_file_path) {
// Convert the C-style strings to C++ strings
std::string bolted_binary_path_str(bolted_binary_path);
std::string output_file_path_str(output_file_path);
// Call the get_vtables function to get the vector of Vtable objects
std::vector<Vtable> vtables = get_vtables(bolted_binary_path_str);
// Create an ofstream object for the output file
std::ofstream output_file(output_file_path_str, std::ios::binary);
// Iterate over the vector of Vtable objects
for (const Vtable& vtable : vtables) {
// Write the address to the output file
output_file.write(vtable.address.c_str(), vtable.address.size());
// Write the length of the binary contents to the output file
size_t length = vtable.binary_contents.size();
output_file.write(reinterpret_cast<const char*>(&length), sizeof(length));
// Write the binary contents to the output file
output_file.write(&vtable.binary_contents[0], vtable.binary_contents.size());
}
// Close the output file
output_file.close();
}Please note that this is a basic outline and you might need to adjust it according to your specific needs. Also, the get_vtables function is not defined here. You would need to implement this function in C++ as well, following the same logic as the Rust version.
Changes on src/write_vtable.cpp
The task requires rewriting a Rust function into C++. Since this file is new and empty, the plan is to write the C++ version of the 'write_vtable' function in this file. The steps to follow are: 1. Analyze the 'write_vtable' function in the Rust file to understand its functionality and logic. 2. Write the equivalent C++ function in this file. Make sure to use the same function name 'write_vtable' and ensure it performs the same functionality as the original Rust function. 3. Test the function to ensure it works as expected. Remember to include any necessary libraries and ensure the function is correctly formatted according to C++ syntax.Changes on elf-extract/src/lib.rs
The `write_vtable` function in Rust takes two arguments: `bolted_binary_path` and `output_file_path`. Both are pointers to C-style strings. The function reads the binary file at `bolted_binary_path`, extracts vtables from it, and writes them to the file at `output_file_path`. Here is a step-by-step breakdown of the function: 1. It converts the `bolted_binary_path` from a C-style string to a Rust string. 2. It calls the `get_vtables` function, which returns a vector of `Vtable` structs. Each `Vtable` struct contains an address and the binary contents of a vtable. 3. It converts the `output_file_path` from a C-style string to a Rust string. 4. It creates a new `BufWriter` for the output file. 5. It iterates over the vector of `Vtable` structs. For each `Vtable`: - It writes the address to the output file. - It writes the length of the binary contents to the output file. - It writes the binary contents to the output file. To rewrite this function in C++, you would need to follow the same steps. However, you would need to use C++ equivalents for the Rust-specific features. For example, you could use `std::ifstream` to read the binary file, and `std::ofstream` to write to the output file. You would also need to create a C++ equivalent for the `Vtable` struct.Current plan usage: 15.71%
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fjrdomingues
@autopilot please rewrite the rust function write_vtable in elf-extract/src/lib.rs into c++ functions