In programming and software design, binding is an application programming interface (API) that provides glue code specifically made to allow a programming language to use a foreign library or operating system service (one that is not native to that 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++. To use such libraries from another language, usually of higher-level, such as Java, Common Lisp, Scheme, Python, or Lua, a binding to the library must be created in that language, possibly requiring recompiling the language's code, depending on the amount of modification needed. However, most languages offer a foreign function interface, such as Python's and OCaml's ctypes
, and Embeddable Common Lisp's cffi
and uffi
.
For example, Python bindings are used when an extant C library, written for some purpose, is to be used from Python. Another example is libsvn
which is written in C to provide an API to access the Subversion software repository. To access Subversion from within Java code, libsvnjavahl
can be used, which depends on libsvn
being installed and acts as a bridge between the language Java and libsvn
, thus providing an API that invokes functions from libsvn
to do the work.
Major motives to create library bindings include software reuse, to reduce reimplementing a library in several languages, and the difficulty of implementing some algorithms efficiently in some high-level languages.
This section needs expansion. You can help by adding to it. (November 2016) |
This section needs expansion. You can help by adding to it. (November 2016) |
This section needs expansion. You can help by adding to it. (November 2016) |
This section needs expansion. You can help by adding to it. (November 2016) |
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