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Oniguruma
=========

https://github.com/kkos/oniguruma

Oniguruma is a modern and flexible regular expressions library. It
encompasses features from different regular expression implementations
that traditionally exist in different languages.

Character encoding can be specified per regular expression object.

Supported character encodings:

  ASCII, UTF-8, UTF-16BE, UTF-16LE, UTF-32BE, UTF-32LE,
  EUC-JP, EUC-TW, EUC-KR, EUC-CN,
  Shift_JIS, Big5, GB18030, KOI8-R, CP1251,
  ISO-8859-1, ISO-8859-2, ISO-8859-3, ISO-8859-4, ISO-8859-5,
  ISO-8859-6, ISO-8859-7, ISO-8859-8, ISO-8859-9, ISO-8859-10,
  ISO-8859-11, ISO-8859-13, ISO-8859-14, ISO-8859-15, ISO-8859-16

* GB18030: contributed by KUBO Takehiro
* CP1251:  contributed by Byte
* doc/SYNTAX.md: contributed by seanofw


Version 6.9.3 (security fix release)
------------------------------------

* Fixed CVE-2019-13224
* Fixed CVE-2019-13225
* Fixed many problems (found by libfuzzer programs)


Version 6.9.2 (Reiwa)
---------------------

* add doc/SYNTAX.md
* Update Unicode version 12.1.0
* NEW: Unicode Text Segment mode option (?y{g}) (?y{w})  (*original)

  g: Extended Grapheme Cluster mode / w: Word mode

  (Unicode Standard Annex #29 [http://unicode.org/reports/tr29/])


Version 6.9.1
-------------

* Speed improvement (* especially UTF-8)


Version 6.9.0
-------------

* Update Unicode version 11.0.0
* NEW: add Emoji properties


Version 6.8.2
-------------

* Fix: #80 UChar in header causes issue
* NEW API: onig_set_callout_user_data_of_match_param()  (* omission in 6.8.0)
* add doc/CALLOUTS.API and doc/CALLOUTS.API.ja


Version 6.8.1
-------------

* Update shared library version to 5.0.0 for API incompatible changes from 6.7.1


Version 6.8.0
-------------

* Retry-limit-in-match function enabled by default
* NEW: configure option --enable-posix-api=no  (* enabled by default)
* NEW API: onig_search_with_param(), onig_match_with_param()
* NEW: Callouts of contents  (?{...contents...}) (?{...}\[tag]\[X<>]) (?{{...}})
* NEW: Callouts of name      (*name) (*name\[tag]{args...})
* NEW: Builtin callouts  (*FAIL) (*MISMATCH) (*ERROR{n}) (*COUNT) (*MAX{n}) etc..
* Examples of Callouts program: [callout.c](sample/callout.c), [count.c](sample/count.c), [echo.c](sample/echo.c)


Version 6.7.1
-------------

* NEW: Mechanism of retry-limit-in-match (* disabled by default)


Version 6.7.0
-------------

* NEW: hexadecimal codepoint \uHHHH
* NEW: add ONIG_SYNTAX_ONIGURUMA (== ONIG_SYNTAX_DEFAULT)
* Disabled \N and \O on ONIG_SYNTAX_RUBY
* Reduced size of object file


Version 6.6.0
-------------

* NEW: ASCII only mode options for character type/property (?WDSP)
* NEW: Extended Grapheme Cluster boundary \y, \Y
* NEW: Extended Grapheme Cluster \X
* Range-clear (Absent-clear) operator restores previous range in retractions.


Version 6.5.0
-------------

* NEW: \K (keep)
* NEW: \R (general newline) \N (no newline)
* NEW: \O (true anychar)
* NEW: if-then-else   (?(...)...\|...)
* NEW: Backreference validity checker (?(xxx)) (*original)
* NEW: Absent repeater (?~absent)  \[is equal to (?\~\|(?:absent)|\O*)]
* NEW: Absent expression   (?~|absent|expr)  (*original)
* NEW: Absent stopper (?~|absent)     (*original)


Version 6.4.0
-------------

* Fix fatal problem of endless repeat on Windows
* NEW: call zero (call the total regexp) \g<0>
* NEW: relative backref/call by positive number \k<+n>, \g<+n>


Version 6.3.0
-------------

* NEW: octal codepoint \o{.....}
* Fixed CVE-2017-9224
* Fixed CVE-2017-9225
* Fixed CVE-2017-9226
* Fixed CVE-2017-9227
* Fixed CVE-2017-9228
* Fixed CVE-2017-9229


Version 6.1.2
-------------

* allow word bound, word begin and word end in look-behind.
* NEW option: ONIG_OPTION_CHECK_VALIDITY_OF_STRING

Version 6.1
-----------

* improved doc/RE
* NEW API: onig_scan()

Version 6.0
-----------

* Update Unicode 8.0 Property/Case-folding
* NEW API: onig_unicode_define_user_property()


License
-------

  BSD license.


Install
-------

### Case 1: Unix and Cygwin platform

   1. autoreconf -vfi   (* case: configure script is not found.)

   2. ./configure
   3. make
   4. make install

   * uninstall

     make uninstall

   * configuration check

     onig-config --cflags
     onig-config --libs
     onig-config --prefix
     onig-config --exec-prefix



### Case 2: Windows 64/32bit platform (Visual Studio)

   Execute make_win.bat

      onig_s.lib:  static link library
      onig.dll:    dynamic link library

   * test (ASCII/Shift_JIS)

      1. cd src
      2. copy ..\windows\testc.c .
      3. nmake -f Makefile.windows ctest

   (I have checked by Visual Studio Community 2015)



Regular Expressions
-------------------

  See [doc/RE](doc/RE) or [doc/RE.ja](doc/RE.ja) for Japanese.


Usage
-----

  Include oniguruma.h in your program. (Oniguruma API)
  See doc/API for Oniguruma API.

  If you want to disable UChar type (== unsigned char) definition
  in oniguruma.h, define ONIG_ESCAPE_UCHAR_COLLISION and then
  include oniguruma.h.

  If you want to disable regex_t type definition in oniguruma.h,
  define ONIG_ESCAPE_REGEX_T_COLLISION and then include oniguruma.h.

  Example of the compiling/linking command line in Unix or Cygwin,
  (prefix == /usr/local case)

    cc sample.c -L/usr/local/lib -lonig


  If you want to use static link library(onig_s.lib) in Win32,
  add option -DONIG_EXTERN=extern to C compiler.



Sample Programs
---------------

|File                  |Description                               |
|:---------------------|:-----------------------------------------|
|sample/simple.c       |example of the minimum (Oniguruma API)    |
|sample/names.c        |example of the named group callback.      |
|sample/encode.c       |example of some encodings.                |
|sample/listcap.c      |example of the capture history.           |
|sample/posix.c        |POSIX API sample.                         |
|sample/scan.c         |example of using onig_scan().             |
|sample/sql.c          |example of the variable meta characters.  |
|sample/user_property.c|example of user defined Unicode property. |
|sample/callout.c      |example of callouts.                      |


Test Programs

|File               |Description                            |
|:------------------|:--------------------------------------|
|sample/syntax.c    |Perl, Java and ASIS syntax test.       |
|sample/crnl.c      |--enable-crnl-as-line-terminator test  |



Source Files
------------

|File               |Description                                             |
|:------------------|:-------------------------------------------------------|
|oniguruma.h        |Oniguruma API header file (public)                      |
|onig-config.in     |configuration check program template                    |
|regenc.h           |character encodings framework header file               |
|regint.h           |internal definitions                                    |
|regparse.h         |internal definitions for regparse.c and regcomp.c       |
|regcomp.c          |compiling and optimization functions                    |
|regenc.c           |character encodings framework                           |
|regerror.c         |error message function                                  |
|regext.c           |extended API functions (deluxe version API)             |
|regexec.c          |search and match functions                              |
|regparse.c         |parsing functions.                                      |
|regsyntax.c        |pattern syntax functions and built-in syntax definitions|
|regtrav.c          |capture history tree data traverse functions            |
|regversion.c       |version info function                                   |
|st.h               |hash table functions header file                        |
|st.c               |hash table functions                                    |
|oniggnu.h          |GNU regex API header file (public)                      |
|reggnu.c           |GNU regex API functions                                 |
|onigposix.h        |POSIX API header file (public)                          |
|regposerr.c        |POSIX error message function                            |
|regposix.c         |POSIX API functions                                     |
|mktable.c          |character type table generator                          |
|ascii.c            |ASCII encoding                                          |
|euc_jp.c           |EUC-JP encoding                                         |
|euc_tw.c           |EUC-TW encoding                                         |
|euc_kr.c           |EUC-KR, EUC-CN encoding                                 |
|sjis.c             |Shift_JIS encoding                                      |
|big5.c             |Big5      encoding                                      |
|gb18030.c          |GB18030   encoding                                      |
|koi8.c             |KOI8      encoding                                      |
|koi8_r.c           |KOI8-R    encoding                                      |
|cp1251.c           |CP1251    encoding                                      |
|iso8859_1.c        |ISO-8859-1 (Latin-1)                                    |
|iso8859_2.c        |ISO-8859-2 (Latin-2)                                    |
|iso8859_3.c        |ISO-8859-3 (Latin-3)                                    |
|iso8859_4.c        |ISO-8859-4 (Latin-4)                                    |
|iso8859_5.c        |ISO-8859-5 (Cyrillic)                                   |
|iso8859_6.c        |ISO-8859-6 (Arabic)                                     |
|iso8859_7.c        |ISO-8859-7 (Greek)                                      |
|iso8859_8.c        |ISO-8859-8 (Hebrew)                                     |
|iso8859_9.c        |ISO-8859-9 (Latin-5 or Turkish)                         |
|iso8859_10.c       |ISO-8859-10 (Latin-6 or Nordic)                         |
|iso8859_11.c       |ISO-8859-11 (Thai)                                      |
|iso8859_13.c       |ISO-8859-13 (Latin-7 or Baltic Rim)                     |
|iso8859_14.c       |ISO-8859-14 (Latin-8 or Celtic)                         |
|iso8859_15.c       |ISO-8859-15 (Latin-9 or West European with Euro)        |
|iso8859_16.c       |ISO-8859-16 (Latin-10)                                  |
|utf8.c             |UTF-8    encoding                                       |
|utf16_be.c         |UTF-16BE encoding                                       |
|utf16_le.c         |UTF-16LE encoding                                       |
|utf32_be.c         |UTF-32BE encoding                                       |
|utf32_le.c         |UTF-32LE encoding                                       |
|unicode.c          |common codes of Unicode encoding                        |
|unicode_fold_data.c|Unicode folding data                                    |
|windows/testc.c    |Test program for Windows (VC++)                        |
