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159 lines
5.5 KiB
Text
159 lines
5.5 KiB
Text
re2c
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DESCRIPTION
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re2c is a tool for generating C-based recognizers from regular expressions.
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re2c-based scanners are efficient: for programming languages, given similar
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specifications, a re2c-based scanner is typically almost twice as fast as a
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flex-based scanner with little or no increase in size (possibly a decrease
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on cisc architectures). Indeed, re2c-based scanners are quite competitive with
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hand-crafted ones.
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Unlike flex, re2c does not generate complete scanners: the user must supply some
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interface code. While this code is not bulky (about 50-100 lines for a
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flex-like scanner; see the man page and examples in the distribution) careful
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coding is required for efficiency (and correctness). One advantage of this
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arrangement is that the generated code is not tied to any particular input
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model.
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DOWNLOAD
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The re2c distribution can be found at:
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https://sourceforge.net/projects/re2c/
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Download the latest tarball:
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https://sourceforge.net/projects/re2c/files/latest/download
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Clone git repo:
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git clone git://git.code.sf.net/p/re2c/code-git
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BUILD
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Contents:
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1. simple build
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2. bootstrap
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3. out-of-source build
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4. testing
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5. rebuild documentation
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6. build for windows with mingw
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7. build from git
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1. Simplest possible build:
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$ ./configure [--prefix=<prefix>]
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$ make
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$ make install
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This will build re2c and install it (binary and man page) to <prefix> (defaults
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to /usr/local).
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2. Bootstrap and rebuild:
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$ ./configure [--prefix=<prefix>]
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$ make bootstrap
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$ make install
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Usual bootstrap procedure: re2c uses re2c to compile its lexer.
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1. build lexer (if make finds re2c binary in build directory, it will build lexer
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from source, otherwize it will use prebuilt lexer)
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2. build re2c
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3. build lexer from source using re2c binary in build directory
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4. rebuild re2c
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3. Out-of-source build:
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$ mkdir <build-directory>
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$ cd <build-directory>
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$ <path-to-configure>/configure [--prefix=<prefix>]
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$ make
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$ make install
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4. Testing:
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$ make check
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This will redirect test script output to file. If you want to see progress:
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$ make tests
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Testing under valgrind (takes a long time):
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$ make vtests
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5. Rebuild documentation (requires rst2man.py):
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$ ./configure --enable-docs [--prefix=<prefix>]
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$ make docs
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$ make install
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6. Build for windows using mingw:
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$ ../configure --host i686-w64-mingw32 [--prefix=<prefix>]
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$ make
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This will result into an executable re2c.exe, which can be tested with wine:
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$ make wtests
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7. If you want to build from git, you'll first need to generate autotools files:
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$ ./autogen.sh
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INFO
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$ man re2c
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re2c home page:
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re2c.org
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re2c manual:
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re2c.org/manual.html
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Ulya Trofimovich's blog on re2c:
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skvadrik.github.io/aleph_null/re2c.html
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Original paper on re2c: "RE2C: a More Versatile Parser Generator" (1994, Peter
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Bumbulis and Donald D. Cowan).
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Examples can be found in 'examples' directory.
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MAILING LISTS
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re2c-general:
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re2c-general@lists.sourceforge.net
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re2c-devel:
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re2c-devel@lists.sourceforge.net
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You are welcome to ask for help or share your thoughts and ideas about re2c :)
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BUGS
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Please report any bugs and send feature requests to:
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https://sourceforge.net/p/re2c/_list/tickets
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AUTHORS
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Originally written by Peter Bumbulis (peter@csg.uwaterloo.ca)
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Currently maintained by:
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Ulya Trofimovich <skvadrik@gmail.com>
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Dan Nuffer <nuffer@users.sourceforge.net>
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Marcus Boerger <helly@users.sourceforge.net>
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Hartmut Kaiser <hkaiser@users.sourceforge.net>
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LICENSE
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re2c is distributed with no warranty whatever. The code is certain to contain
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errors. Neither the author nor any contributor takes responsibility for any
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consequences of its use.
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re2c is in the public domain. The data structures and algorithms used in re2c
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are all either taken from documents available to the general public or are
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inventions of the authors. Programs generated by re2c may be distributed freely.
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re2c itself may be distributed freely, in source or binary, unchanged or
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modified. Distributors may charge whatever fees they can obtain for re2c.
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If you do make use of re2c, or incorporate it into a larger project an
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acknowledgement somewhere (documentation, research report, etc.) would be
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appreciated.
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