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XS (Perl)
XS is a Perl foreign function interface through which a program can call a C or C++ subroutine. XS or xsub is an abbreviation of "eXternal Subroutine", where ''external'' refers to programming languages external to Perl. XS also refers to a glue language for specifying calling interfaces supporting such interfaces (see below). Background Subroutine libraries in Perl are called ''modules'', and modules that contain xsubs are called ''XS modules''. Perl provides a framework for developing, packaging, distributing, and installing modules. It may be desirable for a Perl program to invoke a C subroutine in order to handle very CPU or memory intensive tasks, to interface with hardware or low-level system facilities, or to make use of existing C subroutine libraries. Perl interpreter The Perl interpreter is a C program, so in principle there is no obstacle to calling from Perl to C. However, the XS interface is complex and highly technical, and using it requires some understanding ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Perl
Perl is a family of two High-level programming language, high-level, General-purpose programming language, general-purpose, Interpreter (computing), interpreted, dynamic programming languages. "Perl" refers to Perl 5, but from 2000 to 2019 it also referred to its redesigned "sister language", Perl 6, before the latter's name was officially changed to Raku (programming language), Raku in October 2019. Though Perl is not officially an acronym, there are various backronyms in use, including "Practical Data extraction, Extraction and Reporting Language". Perl was developed by Larry Wall in 1987 as a general-purpose Unix scripting language to make report processing easier. Since then, it has undergone many changes and revisions. Raku, which began as a redesign of Perl 5 in 2000, eventually evolved into a separate language. Both languages continue to be developed independently by different development teams and liberally borrow ideas from each other. The Perl languages borrow featur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Wrapper Function
A wrapper function is a function (another word for a ''subroutine'') in a software library or a computer program whose main purpose is to call a second subroutine or a system call with little or no additional computation. Wrapper functions are used to make writing computer programs easier by abstracting away the details of a subroutine's underlying implementation. Purpose Wrapper functions are a means of delegation and can be used for a number of purposes. Programming convenience Wrapper functions can be used to make writing computer programs easier. An example of this is the MouseAdapter and similar classes in the Java AWT library. Wrapper functions are useful in the development of applications that use third-party library functions. A wrapper can be written for each of the third party functions and used in the native application. In case the third party functions change or are updated, only the wrappers in the native application need to be modified as opposed to changing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Foreign Function Interface
A foreign function interface (FFI) is a mechanism by which a program written in one programming language can call routines or make use of services written in another. Naming The term comes from the specification for Common Lisp, which explicitly refers to the language features for inter-language calls as such; the term is also used officially by the Haskell, Rust, and Python programming languages. Other languages use other terminology: the Ada programming language talks about "language bindings", while Java refers to its FFI as the JNI (Java Native Interface) or JNA ( Java Native Access). Foreign function interface has become generic terminology for mechanisms which provide such services. Operation The primary function of a foreign function interface is to mate the semantics and calling conventions of one programming language (the ''host'' language, or the language which defines the FFI), with the semantics and conventions of another (the ''guest'' language). This proce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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SWIG
The Simplified Wrapper and Interface Generator (SWIG) is an open-source software tool used to connect computer programs or libraries written in C or C++ with scripting languages such as Lua, Perl, PHP, Python, R, Ruby, Tcl, and other languages like C#, Java, JavaScript, Go, D, OCaml, Octave, Scilab and Scheme. Output can also be in the form of XML. Function The aim is to allow the calling of native functions (that were written in C or C++) by other programming languages, passing complex data types to those functions, keeping memory from being inappropriately freed, inheriting object classes across languages, etc. The programmer writes an interface file containing a list of C/C++ functions to be made visible to an interpreter. SWIG will compile the interface file and generate code in regular C/C++ and the target programming language. SWIG will generate conversion code for functions with simple arguments; conversion code for complex types of arguments must be written by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Binary Compatibility
Binary-code compatibility (binary compatible or object-code-compatible) is a property of a computer system, meaning that it can run the same executable code, typically machine code for a general-purpose computer CPU, that another computer system can run. Source-code compatibility, on the other hand, means that recompilation or interpretation is necessary before the program can be run on the compatible system. For a compiled program on a general operating system, binary compatibility often implies that not only the CPUs ( instruction sets) of the two computers are binary compatible, but also that interfaces and behaviours of the operating system (OS) and application programming interfaces (APIs), and the application binary interfaces (ABIs) corresponding to those APIs, are sufficiently equal, i.e. "compatible". A term like backward-compatible usually implies object-code compatibility. This means that newer computer hardware and/or software has (practically) every feature of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Header File
Many programming languages and other computer files have a directive, often called include (sometimes copy or import), that causes the contents of the specified file to be inserted into the original file. These included files are called copybooks or s. There are over one thousand C library files and they are often used to define the physical layout of program data, pieces of procedural code, and/or forward declarations while promoting encapsulation and the reuse of code or data. Header files In computer programming, a header file is a file that allows programmers to separate certain elements of a program's source code into reusable files. Header files commonly contain forward declarations of classes, subroutines, variables, and other identifiers. Programmers who wish to declare standardized identifiers in more than one source file can place such identifiers in a single header file, which other code can then include whenever the header contents are required. This is to keep ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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C Compiler
This page is intended to list all current compilers, compiler generators, interpreters, translators, tool foundations, assemblers, automatable command line interfaces ( shells), etc. Ada Compilers ALGOL 60 compilers ALGOL 68 compilers cf. ALGOL 68s specification and implementation timeline Assemblers (Intel *86) Assemblers (Motorola 68*) Assemblers (Zilog Z80) Assemblers (other) BASIC compilers BASIC interpreters C compilers Notes: Source-to-source compilers This list is incomplete. A more extensive list of source-to-source compilers can be found here. C++ compilers Notes: C# compilers COBOL compilers Common Lisp compilers D compilers DIBOL/DBL compilers ECMAScript interpreters Eiffel compilers Forth compilers and interpreters Fortran compilers Go compilers Haskell compilers Java compilers Lisaac compiler Pascal compilers Perl Interpreters PHP compilers PL/I compilers Python compilers ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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H2xs
H, or h, is the eighth letter in the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is ''aitch'' (pronounced , plural ''aitches''), or regionally ''haitch'' ."H" ''Oxford English Dictionary,'' 2nd edition (1989); ''Merriam-Webster's Third New International Dictionary of the English Language, Unabridged'' (1993); "aitch" or "haitch", op. cit. History The original Semitic letter Heth most likely represented the voiceless pharyngeal fricative (). The form of the letter probably stood for a fence or posts. The Greek Eta 'Η' in archaic Greek alphabets, before coming to represent a long vowel, , still represented a similar sound, the voiceless glottal fricative . In this context, the letter eta is also known as Heta to underline this fact. Thus, in the Old Italic alphabets, the letter Heta of the Euboean alphabet was adopted with its original sound value . While Etruscan and La ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Software Build
In software development, a build is the process of converting source code files into standalone software artifact(s) that can be run on a computer, or the result of doing so. Functions Building software is an end-to-end process that involves many distinct functions. Some of these functions are described below. Version control The version control function carries out activities such as workspace creation and updating, baselining and reporting. It creates an environment for the build process to run in and captures metadata about the inputs and output of the build process to ensure repeatability and reliability. Tools such as Git, AccuRev or StarTeam help with these tasks by offering tools to tag specific points in history as being important, and more. Code quality Also known as static program analysis/static code analysis this function is responsible for checking that developers have adhered to the seven axes of code quality: comments, unit tests, duplication, complexity ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Plain Old Documentation
Plain Old Documentation (pod) is a lightweight markup language used to document the Perl programming language as well as Perl modules and programs. Design Pod is designed to be a simple, clean language with just enough syntax to be useful. It purposefully does not include mechanisms for fonts, images, colors or tables. Some of its goals are: * Easy to parse * Easy to convert to other formats, such as XML, TeX or Markdown * Easy to incorporate sample code * Easy to read without a pod formatter (i.e. in its source-code form) * Easy to write in An extended version of pod that supports tables and footnotes called PseudoPOD has been used by O'Reilly & Associates to produce several Perl books, most notably '' Programming Perl'' by Larry Wall, Tom Christiansen, and Jon Orwant. Pod makes it easy to write manual pages, which are well suited to user-oriented documents. In contrast, other documentation systems, such as Python's Docstring or Java's Javadoc, though they can be used fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Foreign Function Interface
A foreign function interface (FFI) is a mechanism by which a program written in one programming language can call routines or make use of services written in another. Naming The term comes from the specification for Common Lisp, which explicitly refers to the language features for inter-language calls as such; the term is also used officially by the Haskell, Rust, and Python programming languages. Other languages use other terminology: the Ada programming language talks about "language bindings", while Java refers to its FFI as the JNI (Java Native Interface) or JNA ( Java Native Access). Foreign function interface has become generic terminology for mechanisms which provide such services. Operation The primary function of a foreign function interface is to mate the semantics and calling conventions of one programming language (the ''host'' language, or the language which defines the FFI), with the semantics and conventions of another (the ''guest'' language). This proce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Interpreter (computing)
In computer science, an interpreter is a computer program that directly execution (computers), executes instructions written in a Programming language, programming or scripting language, without requiring them previously to have been Compiler, compiled into a machine language program. An interpreter generally uses one of the following strategies for program execution: # Parse the source code and perform its behavior directly; # Translator (computing), Translate source code into some efficient intermediate representation or object code and immediately execute that; # Explicitly execute stored precompiled bytecode made by a compiler and matched with the interpreter Virtual Machine. Early versions of Lisp programming language and BASIC interpreter, minicomputer and microcomputer BASIC dialects would be examples of the first type. Perl, Raku (programming language), Raku, Python (programming language), Python, MATLAB, and Ruby (programming language), Ruby are examples of the second, w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |