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In computing, a binding from a programming language to a library or operating system service is an application programming interface (API) providing glue code to use that library or service in a particular programming language. Binding generally refers to a mapping of one thing to another. In the context of software libraries, bindings are wrapper libraries that bridge two programming languages so that a library written for one language can be used in another language. Many software libraries are written in system programming languages such as C or C++; in order to use these libraries from another (usually higher-level) language such as Java, Common Lisp, Python or Lua, a binding to the library must be created in that language, possibly requiring the recompilation of the language's code depending on the amount of modification necessary. However, most languages offer an interface to foreign functions, such as Python's and OCaml's ctypes, and Embeddable Common Lisp's cffi and uffi. For example, Python bindings are used when an already existing C library written for some purpose is to be used from Python. Another example is libsvn, which is written in C and provides an API for accessing Subversion; in order to access Subversion from within Java code, libsvnjavahl can be used, which depends on libsvn being installed and acts as a bridge between the Java programming language and libsvn, thus providing an API that invokes functions from libsvn to do the real work. Software reuse is a major motivation for creating library bindings, rather than reimplementing the library in several languages. Another is the impossibility of implementing certain algorithms efficiently in high-level languages. ==See also== * Application programming interface (API) * Application Binary Interface (ABI) * Calling convention * Common Language Infrastructure .NET cross-language cross-platform Object Model * Comparison of application virtual machines * COM Microsoft Windows only cross-language Object Model * CORBA Common Object Request Broker Architecture, cross language cross platform object model * DCOM Distributed COM, extension making COM able to work in networks * Embedded SQL * Foreign function interface * Freedesktop.org D-Bus open cross language cross platform Object Model * Name mangling * SWIG open-source interfaces bindings generator from many languages to many languages * Portable object cross language cross platform Object Model definition * Porting * XPCOM Mozilla applications cross-platform Component Object Model * Wrapper function 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Language binding」の詳細全文を読む スポンサード リンク
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