Task 596: .R2D File Format

File Format Specifications for .R2D

The .R2D file format is associated with Borland Reflex 2.0, an obsolete DOS-based flat-file database management system. It is a plain text file that stores database entries in a flat file format. No detailed technical specifications (e.g., headers, field delimiters, or data types) are publicly available, as the software is from the 1980s and documentation is limited to user guides without low-level format details. The file can be opened as plain text, and its content represents the database records.

List of all properties of this file format intrinsic to its file system:

• Plain text content representing database entries (the entire file content is the primary property, as no structured fields or headers are documented).

Two direct download links for files of format .R2D:

• No direct download links for .R2D files were found. The format is obsolete, and no public samples are available online.

Ghost blog embedded HTML JavaScript for drag and drop .R2D file to dump properties:

1. Python class for .R2D file handling:

class R2DFile:
    def __init__(self, filepath):
        self.filepath = filepath
        self.content = None

    def read(self):
        with open(self.filepath, 'r') as f:
            self.content = f.read()

    def decode_and_print(self):
        if self.content is None:
            self.read()
        print("Plain text content (database entries):")
        print(self.content)

    def write(self, new_content):
        with open(self.filepath, 'w') as f:
            f.write(new_content)
        self.content = new_content

# Example usage:
# r2d = R2DFile('example.r2d')
# r2d.decode_and_print()
# r2d.write('New database entries')

1. Java class for .R2D file handling:

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

public class R2DFile {
    private String filepath;
    private String content;

    public R2DFile(String filepath) {
        this.filepath = filepath;
        this.content = null;
    }

    public void read() throws IOException {
        StringBuilder sb = new StringBuilder();
        try (BufferedReader br = new BufferedReader(new FileReader(filepath))) {
            String line;
            while ((line = br.readLine()) != null) {
                sb.append(line).append("\n");
            }
        }
        this.content = sb.toString();
    }

    public void decodeAndPrint() throws IOException {
        if (content == null) {
            read();
        }
        System.out.println("Plain text content (database entries):");
        System.out.println(content);
    }

    public void write(String newContent) throws IOException {
        try (FileWriter fw = new FileWriter(filepath)) {
            fw.write(newContent);
        }
        this.content = newContent;
    }

    // Example usage:
    // public static void main(String[] args) throws IOException {
    //     R2DFile r2d = new R2DFile("example.r2d");
    //     r2d.decodeAndPrint();
    //     r2d.write("New database entries");
    // }
}

1. JavaScript class for .R2D file handling (Node.js, using fs module):

const fs = require('fs');

class R2DFile {
    constructor(filepath) {
        this.filepath = filepath;
        this.content = null;
    }

    read() {
        this.content = fs.readFileSync(this.filepath, 'utf8');
    }

    decodeAndPrint() {
        if (this.content === null) {
            this.read();
        }
        console.log('Plain text content (database entries):');
        console.log(this.content);
    }

    write(newContent) {
        fs.writeFileSync(this.filepath, newContent, 'utf8');
        this.content = newContent;
    }
}

// Example usage:
// const r2d = new R2DFile('example.r2d');
// r2d.decodeAndPrint();
// r2d.write('New database entries');

1. C "class" (using struct and functions) for .R2D file handling:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

typedef struct {
    char *filepath;
    char *content;
} R2DFile;

R2DFile* createR2DFile(const char *filepath) {
    R2DFile *r2d = (R2DFile*)malloc(sizeof(R2DFile));
    r2d->filepath = strdup(filepath);
    r2d->content = NULL;
    return r2d;
}

void readFile(R2DFile *r2d) {
    FILE *file = fopen(r2d->filepath, "r");
    if (file == NULL) {
        perror("Error opening file");
        return;
    }
    fseek(file, 0, SEEK_END);
    long size = ftell(file);
    fseek(file, 0, SEEK_SET);
    r2d->content = (char*)malloc(size + 1);
    fread(r2d->content, 1, size, file);
    r2d->content[size] = '\0';
    fclose(file);
}

void decodeAndPrint(R2DFile *r2d) {
    if (r2d->content == NULL) {
        readFile(r2d);
    }
    printf("Plain text content (database entries):\n");
    printf("%s\n", r2d->content);
}

void writeFile(R2DFile *r2d, const char *newContent) {
    FILE *file = fopen(r2d->filepath, "w");
    if (file == NULL) {
        perror("Error opening file");
        return;
    }
    fprintf(file, "%s", newContent);
    fclose(file);
    free(r2d->content);
    r2d->content = strdup(newContent);
}

void destroyR2DFile(R2DFile *r2d) {
    free(r2d->filepath);
    free(r2d->content);
    free(r2d);
}

// Example usage:
// int main() {
//     R2DFile *r2d = createR2DFile("example.r2d");
//     decodeAndPrint(r2d);
//     writeFile(r2d, "New database entries");
//     destroyR2DFile(r2d);
//     return 0;
// }