If the .r file is a proprietary binary format from specific software (e.g., an old game, a specific engineering tool), standard text editors will show gibberish.
The "Static Analysis" Approach:
Decompiling a Progress OpenEdge .r file (r-code) involves converting the binary executable back into human-readable ABL (Advanced Business Language) source code, typically .p or .w files. Because Progress Software does not officially support reverse engineering, this process requires specialized third-party tools. Why Decompile?
Recovering Lost Source: The most common reason is losing the original .p or .w source code due to hardware failure or lack of version control.
Version Upgrades: When moving to a new OpenEdge release where the r-code version changes, a recompile is required, which necessitates having the source code.
Debugging: Identifying exact line numbers in production errors when source code differs slightly from compiled r-code. Available Tools and Methods
Progress r-code is not standard machine code; it is a specialized bit-code executed by the ABL Virtual Machine (AVM). Consequently, general decompilers like Ghidra are not effective for this format.
PROGRESS R-code Decompiler: A widely recognized tool that supports Progress versions 6 through 12. It can process external functions, parameters, and UI components.
Fast4GL: Historically cited as a source for Progress utilities, though many of these older tools have moved or been deprecated.
Consultancy Services: Some companies, like Dot R, have historically maintained private decompilation tools and offered decompilation as a professional service for companies needing to recover proprietary intellectual property. Decompile dot-r - ProgressTalk.com
Decompilation of .r files varies significantly depending on whether you are working with Progress OpenEdge (r-code) or the R Programming Language. 1. Progress OpenEdge .r Files (r-code)
In this context, .r files are compiled "r-code" executables. Progress Software does not officially support reverse engineering these files.
Current Progress: Full decompilation to original source (.p or .w) is difficult because the compiler strips comments, variable names, and optimizes structures. Available Tools: decompile progress .r file
Progress R-code Decompiler: A third-party tool that can extract text, better handle ON processing, and unify parameter definitions.
Proview / Fast4GL: Older utilities often cited in community forums for converting r-code back to a "workable" (though not perfect) source.
Key Limitations: Decompiled code may replace readable names with meaningless identifiers (e.g., double 6m2jb) and replace structured loops with goto statements. 2. R Language .r Files (Scripts/Bytecode)
Standard .R files are usually plain-text scripts, but "decompilation" typically refers to extracting source code from compiled R packages or bytecode. PROGRESS R-code Decompiler
Decompiling a file depends heavily on what software created it, as multiple platforms use this extension for different purposes. The most common "decompile" scenarios involve Progress OpenEdge R Programming 1. Progress OpenEdge (.r files) In the Progress ABL/4GL environment,
files are compiled "r-code" which is a platform-independent bytecode. www.progresstalk.com : Recovery of lost source code (converting Success Rate
of information can typically be recovered, though variable names and comments may sometimes be lost depending on the tool. Progress R-Code Decompiler
: A well-known service/tool supporting versions from v6 through v12. It handles expressions, table labels, and internal index processing. Paid Services
: Some experts offer manual recovery for legacy v9 files when automated tools fail. PROGRESS Tools 2. R Programming Language (.R scripts)
files are plain-text scripts that do not need "decompiling" because they are already readable. However, if you are trying to view the source of a compiled package: University of Hawaii System Viewing Source : Use standard R functions like body(function_name) print(function_name)
to see the underlying code of functions within a loaded package.
: If the code is pre-compiled into R bytecode, you can still extract the original text using specific extraction scripts that capture output from R Markdown : If you have a file and want just the script, use knitr::purl("file.Rmd") Stack Overflow 3. Ren'Py Game Engine (.rpyc files) Decompiler for Progress 4GL - ProgressTalk.com If the
Decompiling a Progress OpenEdge file (r-code) into readable ABL/4GL source code is complex because
Progress Software does not officially support or provide a decompiler
file is a proprietary binary format containing executable p-code, not standard machine code, which makes it resistant to general-purpose decompilers. Progress Community Available Options for Decompilation
Since there is no official tool, you must rely on third-party services or specific debugging techniques. Third-Party Recovery Services The most well-known solution is the PROGRESS R-code Decompiler . This is typically offered as a paid recovery service rather than a downloadable standalone tool.
It supports various Progress versions from v6 through v12 (including 32-bit and 64-bit) and can recover approximately of the original information.
Note that the recovered source is not identical to the original; it often lacks comments, original variable names, and original formatting. Native Debugging (If Source is Available) If you have the source and only need to understand how the file corresponds to it, use the DEBUG-LIST option during compilation: COMPILE [filename].p DEBUG-LIST [filename].debuglist
This generates a file that maps the original source code to the internal line numbers used by the Progress debugger. Progress Debugger
You can use the built-in Progress Debugger to step through code "on the fly." To enable this, use the utility and run prodebugenable -enable-all This requires the source files to be in your for the debugger to display the logic during execution. Stack Overflow Critical Considerations Version Compatibility
: r-code is highly sensitive to the OpenEdge version it was compiled on. If you are porting code between major versions (e.g., v11 to v13), recompilation is mandatory, making the original source essential. Legal & Security
: Using third-party decompilers may violate Progress OpenEdge license agreements. These tools are generally intended for disaster recovery (e.g., when the original source code is lost). www.progresstalk.com Are you attempting to recover lost source code or just trying to debug an error in an existing application? How to view decompiled R code in order to debug it?
Decompiling a .r file, which is associated with R programming language files, involves reversing the compiled or packaged form back into its source code. This process can be challenging because compiled or packaged R code may not directly translate back into readable source code due to the nature of compilation and packaging. However, for R files that are simply archived or zipped (.r might be mistakenly used instead of .R for R script files), decompiling or more accurately, extracting, is straightforward.
| What you hope for | What you actually get | |------------------|----------------------| | Full script with comments, load order, variable transformations | Function definitions (source code), current object values | | Line-by-line execution history | Nothing – that’s not saved | | Package installation steps | Nothing (only loaded results) | Decompiling a Progress OpenEdge
So “decompiling” here means: extracting all user-defined functions and inspecting key objects to reconstruct logic.
The best decompiler is a time machine. Set this up today:
# In your .Rprofile or script header
savehistory(file = paste0("script_log_", Sys.Date(), ".Rhistory"))
# Or use RStudio's auto-save + version control
Better: use RMarkdown or Quarto – they store code + narrative. Or git commit your .R scripts.
Limitation: No IF/ELSE statements, no FOR EACH logic, no calculations. Just a symbol table.
.r files are plain text files containing R code. Unlike compiled languages that produce binary executables, R code is interpreted line by line. This means you don't have a traditional compilation and decompilation process as you might with languages like C or C++.
Sometimes developers save R variables or functions into a file using save(). The extension might be .r, .rda, or .rds.
Decompilation/Extraction Steps:
Progress developers have a hidden weapon: the -rcdump startup parameter. This is not a decompiler, but a disassembler.
Yes, partially. But there is a massive caveat: There is no official, one-click "decompiler" from Progress Software.
Unlike Java (with JAD or CFR) or .NET (with ILSpy), Progress’s R-code format was designed for performance, not disassembly. However, the community and legacy tooling provide three distinct methods:
Let’s explore each method in detail.