Binary platform independence

EDIT: Silly me, now I see that you need all this for a library and not for your application. In my testing, I was astonished at how much slower a COM server was compared to a library compiled from the same Pascal code. COM is an idea whose time has passed. Pool to parallelize it across all CPU processors for maximum performance. For example, does your code create any temporary files? COM must have considerable overhead compared to calling a dynamic library directly. Now on Windows and Linux. Something about the shift in perspective from being the producer of the code to the consumer of the code really made a difference in how I saw the code and its interfaces. What do you use in Lazarus for this?

Python, just like a client might. That way they can parallelize it if necessary however they want. AVX and SSE support quest. Note that just coming up with one or more other language interfaces to your library is only part of the solution. Not only did I end up making a lot of improvements to the interfaces, I also improved the Pascal code quite a bit. You should take a look at some language and os independent solution which can pass proxies like butter. In Delphi on Win this can be quite not difficult done with COM, but in Lazarus and on another platforms?

Thank you Phil and Avra for your ideas. How are those files named? With these types of apps, you would need a huge number of calls into the library to make any measurable difference in performance compared to code statically linked into the executable. Why not just compile against the Pascal units as per usual? In my case I had an auxiliary project that needed the functionality of the code in the library. If you _are_ able to demonstrate a difference in performance, then you should really be concerned with COM, which is much slower than calling into a dynamic library. GUI except some config.

So long as the different versions have similar user interfaces, both versions can be tested at one time, with one test case. Such advanced applications routinely depend on additional features found only in the more recent versions of popular web browsers. Apple mobile devices, RPG, Ruby, Visual Basic, and Visual FoxPro. Can also be used on the web through Ruby on Rails. With this technique, code that is common to all platforms is not repeated. While this is a straightforward approach to the problem, it has the potential to be considerably more expensive in development cost, development time, or both, especially for corporate entities.

Xojo makes native, compiled desktop apps for macOS, Windows, Linux and Raspberry Pi. Software platforms can either be an operating system or programming environment, though more commonly it is a combination of both. Much of the browser itself is written in XUL, CSS, and JavaScript, as well. The Java language typically compiles to a virtual machine: a virtual CPU which runs all of the code that is written for the language. Java, which uses an operating system independent virtual machine for its compiled code, known in the world of Java as bytecode. Graceful degradation attempts to provide the same or similar functionality to all users and platforms, while diminishing that functionality to a least common denominator for more limited client browsers. Such applications follow a simple transaction model, identical to that of serving static web pages. As an example, Disney could create a game with the intention of release on the latest Nintendo and Sony game consoles. For example, Linux uses a different API for application software than Windows does.

Windows via the Cygwin POSIX compatibility layer. SDK which uses Unreal Engine. IDE, written in eC and with support for additional languages such as C and Python. The Java platform is a virtual machine platform which runs on many operating systems and hardware types, and is a common platform for software to be written for. Gmail may notice that Gmail switches to basic mode, with reduced functionality. API that provides low and high level access to graphics, input, audio, etc. Linux, MacOSX, iOS, Android, WinCE, Windows and WEB. Epic Games, Microsoft, and Valve Corporation all possess technology that allows Xbox 360 and PlayStation 3 gamers to play with PC gamers, leaving the decision of which platform to use to consumers.

Basic web applications perform all or most processing from a stateless server, and pass the result to the client web browser. Juce as its GUI layer. BSD on multiple computer architectures. Unlike binary executable files, the same script can be used on all computers that have software to interpret the script. An example of a common platform is Microsoft Windows running on the x86 architecture. When working quickly, such opposing conventions may even result in data loss of money, such as in a dialog box confirming whether the user wants to save or discard changes to a file.

Retrieved 28 January 2014. An open source widget toolkit that is also an application framework. SDK which uses Unity Engine. Different platforms require the use of native package formats such as RPM and MSI. X11, Microsoft Windows and macOS. Several developers have implemented means to play games online while using different platforms. JNI can also be used to enable access to operating system specific functions. There may be some issues, however, such as the type of new line character that sits between the lines. One technique is conditional compilation.

Blocks of code that are only relevant to certain platforms are made conditional, so that they are only interpreted or compiled when needed. Older versions of popular web browsers tend to lack support for certain features. There are, however, many devices such as smartphones that are also effectively computer platforms but less commonly thought about in that way. Android, iOS and other mobile operating systems. Linux, OpenBSD, NetBSD, macOS and FreeBSD. Anant Computing: A mobile application platform that works in all Indian languages, including their keyboards, which is also supports AppWallet and Native performance inside all operating systems. PowerPC and x86 through what Apple Inc. It could be said that such programs are platform agnostic. The characteristics of a particular system may lengthen the time taken to implement a video game across multiple platforms.

AppearIQ: A framework that supports the workflow of app development and deployment in an enterprise environment. Developers are often restricted to using the lowest common denominator subset of features which are available on all platforms. InstallAnywhere address this need. An open source widget toolkit that is completely implemented in Object Pascal. All user interaction with the application consists of simple exchanges of data requests and server responses. The use of different toolsets to perform different builds may not be sufficient to achieve a variety of working executables for different platforms. Using tools such as the Page Object Model, cross platform tests can be scripted in such a way that one test case is usable for multiple versions of an app.

SDK based on the popular Qt framework. This setup allows users to decide the appropriate protection level, depending on an ACL. The platforms it currently supports are: Android, iOS, Windows, macOS, Linux and Raspberry Pi. Scripting languages and virtual machines must be translated into native executable code each time the application is executed, imposing a performance penalty. The idea behind this is to create more than two different programs that have the ability to behave similarly to each other. Used for CGI WWW programming, small system administration tasks, and more. Prominent examples of advanced web applications include the Web interface to Gmail, A9. Implemented in Java with a configurable architecture which supports many tools for software development. Generally, however, little or no work has to be done to make a script written for one system, run on another. Techniques such as full virtualization are sometimes used as a workaround for this problem. Another technique is separation of functionality, which disables functionality not supported by client browsers or operating systems, while still delivering a complete application to the user.

So, a video game may initially be released on a few platforms and then later released on remaining platforms. The distinction between traditional and web applications is not always unambiguous, however, because applications have many different features, installation methods and architectures; and some of these can overlap and occur in ways that blur the distinction. FLTK: Another open source cross platform toolkit, but more lightweight because it restricts itself to the GUI. Natively developed containers present hardware features of the mobile devices or tablets through an API to HTML5 code thus facilitating the development of mobile apps that run on different platforms. These types of applications were the norm in the early phases of World Wide Web application development. IDE for Windows, Linux, Mac OS X, and mobile operating systems. Lazarus: A programming environment for the FreePascal Compiler. One example as of August 2006 was OpenOffice.

In addition to the complications mentioned previously, there is the additional restriction that some web browsers prohibit installation of different versions of the same browser on the same operating system. It creates compiled web apps that can be run as standalone servers or through CGI. Delphi: A cross platform IDE, which uses Pascal language for Development. As previously noted, the Java platform is an exception to the general rule that an operating system is a software platform. Play apps and games are created within Qt Creator. The JVM makes the system calls on behalf of the Java application.

Java programs can be executed natively using a Java processor. It currently supports Linux, Windows and a bit of Windows CE. Typically, this situation occurs when a new gaming system is released, because video game developers need to acquaint themselves with the hardware and software associated with the new console. Microsoft Windows and KDE have the opposite convention. It runs on many operating systems including Linux, Windows and macOS and is aimed at games and multimedia applications. Although, there are several development approaches that companies use to target multiple platforms, all of them result in software that requires substantial manual effort for testing and maintenance across the supported platforms. Just because a particular operating system may run on different computer architectures, that does not mean that the software written for that operating system will automatically work on all architectures that the operating system supports. Nevertheless, this simplifying distinction is a common and useful generalization. And it recently added the ability to create native iOS apps. Currently it supports Android, iOS, Windows, macOS.

These dependencies include Ajax, JavaScript, Dynamic HTML, SVG, and other components of rich Internet applications. This is because the script is generally stored in plain text in a text file. Final Fantasy XIV, Street Fighter V, Killer Instinct, Paragon and Fable Fortune, and Minecraft with its Better Together update on Windows 10, VR editions, Pocket Edition and Xbox One. Xojo: A RAD IDE developed by Xojo, Inc. X11 and Microsoft Windows. Smartface: A cross platform native app development tool to create mobile applications for Android and iOS, using WYSIWYG design editor with JavaScript code editor. Cairo is written in C and has bindings for many programming languages.

Macintosh computers, runs applications compiled for the previous generation of Macs that used PowerPC CPUs. API will take time to percolate everywhere. Alicia, two things must happen. Pure Java coffee cup icon. Java Platform has been deployed on multiple platforms. Java programs on all platforms you plan to claim it runs on. Alicia will have a Java Platform implementation on her computer or device.

On one level, it is a battle between two icons. Pure certification is not quite a full measure of platform independence. Another major variation between different Java Platform implementations is user interface. Standard Edition, and calls these Standard Extension APIs. Java API, but permits differentiation in the areas of performance and extensions. API proprietary to that vendor. API subsets to adequately address. Test your program on all of your target runtimes and all of your target hosts. Sun, vendors still felt the need to define and support their own API subsets.

Java Platform execution environments provided by other device vendors. Users on different platforms are accustomed to different ways of interacting with their computer. Windows or Solaris use native methods to access the host. As a result, it can run on any computer that hosts a Java Platform. Card Platform can run on a SmartCard. The trouble is, so can everyone else.

The components are different. UNIX workstations in engineering, and PCs running Windows everywhere else. IEEE 754 floating point standard. Java programs, but some changes may not be. Java program you write depends on how you write it. Java virtual machine that can be implemented differently by different vendors. Java class files can be generated on any platform. Three years after Java was first released by Sun, Sun announced Jini.

Java Platform edition and version that your programs depend upon. Extension APIs, and parts of the Standard Extension API may migrate into the Standard Edition. Pure verification tools you can download for free. This arrangement allows developers to balance platform independence with other concerns. Java Platform implementations and their distribution. Java programs, and looks at the relevant tradeoffs. This is not always an not difficult task. Java API, individual vendors may also supply extra libraries. Java virtual machine instruction set.

One final source of variation among different implementations of the Java Platform is bugs. Java program goes, it need only interact with the Java Platform. Java Platform will enable you to write programs that really are platform independent. Strive to design a user interface that works well on all of your target hosts. API standards for the embedded and consumer worlds. Java Platform is called the standard API. Write your program to run on this version of the Java Platform. The interaction between the components is different. Java Platform on the desktop.

Java API, you are certain it will be available everywhere. This chapter examines platform independence in detail. Java Platform implementations from different vendors. The degree of platform independence of any Java program depends on several factors. The old Personal and Embedded platforms become profiles in the new approach. Platform independent binary representation of objects used to be a good idea some years ago, about the time RPC, COM, Java, QT etc were being designed. Sorry if I am insisting so much, I am trying to understand.

So I am asking myself. Character encodings do not enter the picture. Again, in practice, a byte is an octet except in some legacy systems. Is there a safe way to trasmit OCTECTS with stream? In theory there is no difference between theory and practice. Or in other words, a character may be represented by more than one bye. Or written and read from a UDF file system.

If a text file is sent from a windows machine to a POSIX machine, can it be trusted to be printed exactly as the original? Yes, if it is transmitted over FTP in text mode. IP network byte order. Every byte has a unique address. This work probably is not hard itself, but I soonly figured that, if I want to provide a BinaryStream, possibly platform independent, you should provide manage binaries in an uniform way. Whenever text is to be written on one machine and read on another, these differences have to be accounted for; and de jure or de facto standards are always involved. If data is transmitted in binary mode, it is treated as a stream of bits.

What do you think about? If so, it can be possible it is the same also for char if parsed in a raw mode binary? No, if it transmitted over FTP in binary mode. The question still remains: what do you do with floating point values? Question 2: indirectly related to the first one. Sorry if, after time, I am still asking about this subject but there is a thing I am missing. The TEXT rule is only used for descriptive field contents and values that are not intended to be interpreted by the message parser. In practice there is. POSIX would have to be translated if the text is sent or received over HTTP. Or sent over a socket as raw bytres.

Now, processors are much faster, and it is a terrible idea. Yes, you are right when speaking about newlines mark. NEt but couldnt find much on it. But, Erlang being a VM based language, I must be having some facility to write platform independent code. Now, this would give me a problem when run on LINUX as LINUX is little endian based. Presents strategies to designing platform agnostic mobile apps connected to cloud based services that can handle heavy loads of modern computing Provides development patterns for platform agnostic app development and technologies Includes recommended standards and structures for not difficult adoption Covers. An HTML attachment was scrubbed. You are right in terms of true platform independence for file types. As a programmer, you need to watch out for these things, always use the platform independent option where possible and test properly on different platforms if you care about portability. But you should still test it! Write Once Run Anywhere promise.

This is done deliberately in order to allow applications that use these libraries to be able to run on any platform. Windows and Linux and compiling native applications for both platforms. They also did the same when they first released Delphi. Sun MicroSystems slogan was WORA: Write Once Run Anywhere. There are always some constraints on specific platforms that cannot be ignored. But the term platform independence is not usually applied to files. JVM is installed on. Platform independence in software means that you can run some code with little or no modification on multiple platforms. JRE for each platform.

For example, if you hardcode file path separators rather than using the platform independent File. As comparison, C has very little runtime requirements and can therefore offer higher portability. For example, the Java libraries that access the filesystem know the fact that Windows and Linux use different filename path separators, and take account of this for you. And algorithms can be said to be platform independent in this way. JAVA is an object oriented platform independant programming language. This approach was also taken years ago by Borland in its Delphi product. Since the JVM requires a host, I can tell you that a Java program is not platform independent.

There are occasionally bugs in language implementations that only occur on certain platforms. In my opinion, this is also a kind of platform independence. JAVA is platform independant. Examples are things like the maximum length of filenames, or the available RAM on a system. No matter how much you try to be platform independent, your code may fail if you try to run it on a platform that is too tightly constrained. This window contains diagnostic and troubleshooting information. Navigate to the bin directory inside the location where GeoServer is installed.

This can be done either via Windows Explorer or the command line. Windows, please see the section on the Windows installer. GeoServer Web administration interface. If you see the GeoServer logo, then GeoServer is successfully installed. For installing on Windows with an existing application server such as Tomcat, please see the Web archive section. This version is a GeoServer web application bundled inside Jetty, a lightweight and portable application server. This window must be left open, otherwise GeoServer will shut down. It has the advantages of working very similarly across all operating systems and is very simple to set up. Really sorry if I am sounding naive. Thanks a lot Dmitry.

There are no needs for ntohs functions in erlang. Thanks Dmitry for the quick response. The archive file upload currently does not support binary dependencies but rather only JavaScript dependencies. It does seem silly that Bluemix Cloud Functions do not include this package as part of the list of default packages but I think they just went with whatever in included in OpenWisk by default. Programming Our First Java Program Yingcai Xiao. What do you mean by JAVA platform independence?

Originally from Sun Microsystem. It may contain words, phrases etc which the machine does not understand. Therefore, a compiler is a program that translates the source code for another program from a programming language into executable code. OS it does not run, since it is OS dependent and hence is not compatible with the other OS. Whenever, a program is written in JAVA, the javac compiles it. This article is contributed by Sania Parween. This executable code may be a sequence of machine instructions that can be executed by the CPU directly, or it may be an intermediate representation that is interpreted by a virtual machine. The meaning of platform independent is that, the java source code can run on all operating systems. So, here comes the role of a compiler.

See your article appearing on the GeeksforGeeks main page and help other Geeks. Mac OS X you will have a different JVM than if you are running Windows or some other operating system. And finally program runs to give the desired output. This intermediate representation in Java is the Java Byte Code. This interpreter is the JVM and thus the Bytecode is executed by the JVM. Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above. In the case of Java, it is the magic of Bytecode that makes it platform independent. JVM is targeted for the operating system that you are running. Every system has its own JVM which gets installed automatically when the jdk software is installed.

This adds to an important feature in the JAVA language termed as portability. Different JVM is designed for different OS and byte code is able to run on different OS. If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute. One skilled in the art will recognize the option of introducing additional parameters to the region descriptor data structure to control the filling and allocation of memory regions without departing from the scope of the present invention. IFT element, and offset comprises an offset to IFT from the current region descriptor table. One of ordinary skill in the art may appreciate that the invention can be practiced with various computer system configurations, including multiprocessor systems, minicomputers, mainframe computers, and the like. Program code is applied to the data entered using the input device to perform the functions described and to generate output information. Instrumenting module 14 may intercept the registration request and substitute the original function address with an address of a selected interceptor function copy 16 chosen in accordance with an embodiment of the present invention. The techniques described herein are not limited to any particular hardware or software configuration; they may find applicability in any computing or processing environment.

The techniques may be implemented in logic embodied in hardware, software, or firmware components, or a combination of the above. The output information may be applied to one or more output devices. Such expressions are merely a shorthand way of stating the execution of the software by a processing system to, cause the processor to perform an action or produce a result. The methods described herein may be provided as a computer program product that may include a machine readable medium having stored thereon instructions that may be used to program a processing system or other electronic device to perform the methods. The intercepted function address table contains addresses of all intercepted functions. The invention can also be practiced in distributed computing environments where tasks may be performed by remote processing devices that are linked through a communications network. Then, at block 112, a next successive element of IFT may be selected as current. Google Scholar results, and Japanese and South Korean patents. Additional means are provided to dynamically adapt to system memory conditions and the number of original functions to intercept.

The C code is provided for the purpose of illustration only and does not constitute a complete software binary instrumentation system. Finally, the address of an intercepted function corresponding to the active copy of the interceptor function may be read from the intercepted function address table. Each time a function or code block needs to be intercepted a new copy of the procedure from a provided memory region may be associated with the address of the function or block of code by means of a memory region descriptor and an intercepted function address table. Alternatively, the operations may be performed by specific hardware components that contain hardwired logic for performing the operations, or by any combination of programmed computer components and custom hardware components. Using the IEEE format is one possibility but have you considered binary coded decimal? EOS, which tried to do the same, but it was never merged into boost. What else do you want? Are there special values like NaN and INF? Does that make sense?

The result is fatal loss of money of data. The incompatible bases are the issue, not how you encode the resulting digits. Are there distinct positive and negative zero values? As denormalized numbers get smaller, they gradually lose precision as the left bits of the fraction become zeros. Boost now has a library to convert endianness, boost. NaN, but not every operation you might use is fully pegged down to how they behave with NaN arguments by IEEE. Is there a reason to support exactly recreating them? You may be thinking of NEON on ARMv7, which does things like flush denormal floats to zero.

Lossy conversions only happen when you have two different representations which each support different sets of values, and convert between them. IEEE754 was originally created. Min and max are notably very different with respect to NaN on x86 and ARM. It so happens that all sane platforms already use it as the platform representation. So as long as both ends are using the same assumptions then no issues. You serialize to a binary floating point representation that has same or larger exponent range and number of bits of mantissa. However, ldexp and similar functions are there to support building floating point values from separate mantissas and exponents.

The ASCII string is presumably decimal. When you serialize things on one machine, you want to be able to read the format on another machine, that possibly has different endianess and possibly uses a different floating point format. Even then, it depends on which two representations, and the conversion direction. This looks confused to me. Those come with the drawbacks of creating larger files and slow serialization speed. You might be able to do it with reinterpret_cast instead, but I honestly have no idea whether that counts as Undefined Behavior or not. Not all ASCII strings are numbers. NaN representations as the mantissa can be anything but zero. Is that really guaranteed by the standard?

Will it support denormalization? Trying to normalize the number program B causes exponent underflow. Graphics cards are indeed a lot more varied, especially mobile GPUs, and especially older ones. From this you can interpret zero as a special type of denormalized number. Are any of these significant? If you can ensure all senders and receivers use the same exact representation of the IEEE 754 format then the binary representation from one to the other should be exact. EDIT: it looks good.

SSE, AVX, and NEON on ARMv8 are fully IEEE compliant. ASCII text will definitely provide you proper cross platform representations but as you say that tends to take up more space. Even with those limitations, support for floating point types was not reliable and was removed. Unfortuntaly, there are no plans to handle floating point numbers in the same way. Do you guys have advice to share about such a project? Then one only needs a solution for the other platforms. Are the mantissa and exponent represented as 2s complement, or some other way?

Conversion from ASCII to IEEE754 binary floating point is lossy for the following reasons. How could it even be guaranteed, if there are platforms which do not have nans and infs? For all practical purposes, binary serialization and endianness for integers are one and the same problem.