Task 107: .CPP File Format
Task 107: .CPP File Format
File Format Specifications for .CPP
The .CPP file extension is used for C++ source code files. It is a plain text format containing code written in the C++ programming language, following the syntax and semantics defined by the C++ standard (such as ISO/IEC 14882:2020 for C++20). There is no binary header or structured format; the file is human-readable text, typically encoded in ASCII or UTF-8, with line endings depending on the platform (e.g., LF on Unix, CRLF on Windows). The content can include preprocessor directives, class definitions, functions, variables, and other C++ constructs. Compilation tools like GCC recognize .CPP as C++ source and compile it accordingly.
- List of all the properties of this file format intrinsic to its file system:
Since .CPP is a text-based format without a specific binary structure, it does not have intrinsic "format properties" like headers or fields. However, every file, including .CPP, has metadata properties managed by the file system (e.g., via the inode on Unix-like systems or NTFS attributes on Windows). These are the standard properties accessible via OS APIs like stat():
- File size (in bytes)
- Creation time (birth time, if supported by the file system)
- Last modification time
- Last access time
- Mode (permissions, e.g., read/write/execute bits)
- Owner user ID (UID)
- Owner group ID (GID)
These properties are not unique to .CPP but are intrinsic to how the file system stores and manages any file.
- Two direct download links for files of format .CPP:
- https://gist.githubusercontent.com/kilip/3873805/raw/HelloWorld.cpp (a simple "Hello World" C++ source file)
- https://raw.githubusercontent.com/sinairv/Cpp-Tutorial-Samples/master/01 - HelloWorld/HelloWorld.cpp (another "Hello World" C++ example from a tutorial repository)
- Ghost blog embedded HTML JavaScript for drag-and-drop .CPP file dump:
Assuming "ghost blog" refers to embedding this in a Ghost CMS blog post (via HTML card or code injection), here's the self-contained HTML + JavaScript snippet. It creates a drop zone where a user can drag and drop a .CPP file. The script accesses the File API to extract and display the available properties (note: browser security limits this to name, size, type, and last modified time; full file system properties like UID/GID are not accessible in the browser).
Embed this directly in a Ghost blog post using the HTML card feature.
- Python class for .CPP files:
import os
import time
class CppFile:
def __init__(self, path):
self.path = path
self.stat = os.stat(path)
def read(self):
"""Read and decode the file content as text."""
with open(self.path, 'r', encoding='utf-8') as f:
return f.read()
def write(self, content):
"""Write text content to the file."""
with open(self.path, 'w', encoding='utf-8') as f:
f.write(content)
def print_properties(self):
"""Print all file system properties to console."""
print(f"File size: {self.stat.st_size} bytes")
print(f"Creation time: {time.ctime(self.stat.st_birthtime) if hasattr(self.stat, 'st_birthtime') else 'N/A'}")
print(f"Last modification time: {time.ctime(self.stat.st_mtime)}")
print(f"Last access time: {time.ctime(self.stat.st_atime)}")
print(f"Mode (permissions): {oct(self.stat.st_mode)}")
print(f"Owner UID: {self.stat.st_uid}")
print(f"Owner GID: {self.stat.st_gid}")
# Example usage:
# cpp = CppFile('example.cpp')
# print(cpp.read()) # Decodes and reads content
# cpp.write('New content') # Writes content
# cpp.print_properties() # Prints properties
- Java class for .CPP files:
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.attribute.BasicFileAttributes;
import java.nio.file.attribute.PosixFileAttributes;
import java.nio.file.attribute.PosixFilePermissions;
import java.nio.file.attribute.UserPrincipal;
public class CppFile {
private final Path path;
private final BasicFileAttributes attrs;
public CppFile(String filePath) throws IOException {
this.path = Paths.get(filePath);
this.attrs = Files.readAttributes(path, BasicFileAttributes.class);
}
public String read() throws IOException {
// Read and decode as UTF-8 text
return Files.readString(path, StandardCharsets.UTF_8);
}
public void write(String content) throws IOException {
// Write text content
Files.writeString(path, content, StandardCharsets.UTF_8);
}
public void printProperties() throws IOException {
// Print file system properties
System.out.println("File size: " + attrs.size() + " bytes");
System.out.println("Creation time: " + attrs.creationTime());
System.out.println("Last modification time: " + attrs.lastModifiedTime());
System.out.println("Last access time: " + attrs.lastAccessTime());
// POSIX-specific (may not work on Windows)
try {
PosixFileAttributes posixAttrs = Files.readAttributes(path, PosixFileAttributes.class);
System.out.println("Mode (permissions): " + PosixFilePermissions.toString(posixAttrs.permissions()));
UserPrincipal owner = posixAttrs.owner();
System.out.println("Owner UID: " + owner.getName()); // UID not directly available; use name
System.out.println("Owner GID: " + posixAttrs.group().getName());
} catch (UnsupportedOperationException e) {
System.out.println("POSIX attributes not supported on this platform.");
}
}
// Example usage:
// public static void main(String[] args) throws IOException {
// CppFile cpp = new CppFile("example.cpp");
// System.out.println(cpp.read());
// cpp.write("New content");
// cpp.printProperties();
// }
}
- JavaScript class for .CPP files (Node.js environment):
const fs = require('fs');
class CppFile {
constructor(path) {
this.path = path;
this.stat = fs.statSync(path);
}
read() {
// Read and decode as UTF-8 text
return fs.readFileSync(this.path, 'utf-8');
}
write(content) {
// Write text content
fs.writeFileSync(this.path, content, 'utf-8');
}
printProperties() {
// Print file system properties to console
console.log(`File size: ${this.stat.size} bytes`);
console.log(`Creation time: ${this.stat.birthtime}`);
console.log(`Last modification time: ${this.stat.mtime}`);
console.log(`Last access time: ${this.stat.atime}`);
console.log(`Mode (permissions): ${this.stat.mode.toString(8)}`);
console.log(`Owner UID: ${this.stat.uid}`);
console.log(`Owner GID: ${this.stat.gid}`);
}
}
// Example usage:
// const cpp = new CppFile('example.cpp');
// console.log(cpp.read());
// cpp.write('New content');
// cpp.printProperties();
- C class for .CPP files (using C++ for class support):
#include <iostream>
#include <fstream>
#include <string>
#include <sys/stat.h>
#include <ctime>
class CppFile {
private:
std::string path;
struct stat statbuf;
public:
CppFile(const std::string& filePath) : path(filePath) {
if (stat(path.c_str(), &statbuf) != 0) {
std::cerr << "Error getting file stats" << std::endl;
}
}
std::string read() {
// Read and "decode" as text
std::ifstream file(path);
if (!file) {
return "Error opening file";
}
std::string content((std::istreambuf_iterator<char>(file)), std::istreambuf_iterator<char>());
return content;
}
void write(const std::string& content) {
// Write text content
std::ofstream file(path);
if (file) {
file << content;
} else {
std::cerr << "Error writing to file" << std::endl;
}
}
void printProperties() {
// Print file system properties to console
std::cout << "File size: " << statbuf.st_size << " bytes" << std::endl;
std::cout << "Creation time: N/A (use st_ctime for status change: " << std::ctime(&statbuf.st_ctime) << ")" << std::endl; // True creation not always available
std::cout << "Last modification time: " << std::ctime(&statbuf.st_mtime);
std::cout << "Last access time: " << std::ctime(&statbuf.st_atime);
std::cout << "Mode (permissions): " << std::oct << statbuf.st_mode << std::endl;
std::cout << "Owner UID: " << statbuf.st_uid << std::endl;
std::cout << "Owner GID: " << statbuf.st_gid << std::endl;
}
};
// Example usage:
// int main() {
// CppFile cpp("example.cpp");
// std::cout << cpp.read() << std::endl;
// cpp.write("New content");
// cpp.printProperties();
// return 0;
// }