Editing QuakeC (section)

== Modified compilers and language extensions ==
A decompiler and a recompiler were released by [[Armin Rigo]] (called <code>DEACC</code> and <code>REACC</code> respectively). These programs were made through the process of [[reverse engineering]], and were most likely published before the release of <code>qcc</code>.<ref>{{Cite web|url=http://users.yknet.yk.ca/dmckay/qmap/inter.html|title=Interview with Armin Rigo - Feb. 12th 1997|date=April 30, 1997|archive-url=https://web.archive.org/web/19970430160107/http://users.yknet.yk.ca/dmckay/qmap/inter.html|archive-date=1997-04-30}}</ref>

[[id Software]] released the source of <code>qcc</code>, their QuakeC compiler, along with the original QuakeC code in 1996. Modified versions soon sprung up, including Jonathan Roy's <code>fastqcc</code> and Ryan "FrikaC" Smith's [[FrikQCC]].  These added functionality, optimizations, and compiling speed boosts.

In 1999, when id Software released the code from Quake's engine under the [[GNU General Public License]] (GPL), the workings of the bytecode interpreter were examined and new QuakeC compilers were released, such as J.P. Grossman's <code>qccx</code> and a new version of FrikQCC.  These compilers took advantage of newly discovered features in a backwards-compatible way so that the bytecode could still be properly interpreted by unmodified Quake engines.  New features include arrays, pointers, integers, for loops and string manipulation.

With the ''Quake'' engine source code now able to be changed, further features were added to QuakeC in the form of new built-in functions. Features long yearned for by QuakeC coders finally reached realization as QuakeC now had file and string handling functions, enlarged string buffers, more math functions, and so on.  However, programmers taking advantage of these changes lost backwards compatibility with the unmodified Quake engine.

''[[Xonotic]]'' since version 0.7 uses the [https://github.com/graphitemaster/gmqcc gmqcc] compiler.<ref>{{cite web| url = http://www.xonotic.org/2013/06/xonotic-0-7-release/| title = Xonotic 0.7 Release}}</ref>