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1  README file for PCRE (Perl-compatible regular expressions)  README file for PCRE (Perl-compatible regular expression library)
2  ----------------------------------------------------------  -----------------------------------------------------------------
3    
4  *******************************************************************************  The latest release of PCRE is always available in three alternative formats
5  *           IMPORTANT FOR THOSE UPGRADING FROM VERSIONS BEFORE 2.00           *  from:
6  *                                                                             *  
7  * Please note that there has been a change in the API such that a larger      *    ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-xxx.tar.gz
8  * ovector is required at matching time, to provide some additional workspace. *    ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-xxx.tar.bz2
9  * The new man page has details. This change was necessary in order to support *    ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-xxx.zip
10  * some of the new functionality in Perl 5.005.                                *  
11  *                                                                             *  There is a mailing list for discussion about the development of PCRE at
12  *           IMPORTANT FOR THOSE UPGRADING FROM VERSION 2.00                   *  
13  *                                                                             *    pcre-dev@exim.org
14  * Another (I hope this is the last!) change has been made to the API for the  *  
15  * pcre_compile() function. An additional argument has been added to make it   *  Please read the NEWS file if you are upgrading from a previous release.
16  * possible to pass over a pointer to character tables built in the current    *  The contents of this README file are:
17  * locale by pcre_maketables(). To use the default tables, this new arguement  *  
18  * should be passed as NULL.                                                   *    The PCRE APIs
19  *                                                                             *    Documentation for PCRE
20  *           IMPORTANT FOR THOSE UPGRADING FROM VERSION 2.05                   *    Contributions by users of PCRE
21  *                                                                             *    Building PCRE on non-Unix systems
22  * Yet another (and again I hope this really is the last) change has been made *    Building PCRE on Unix-like systems
23  * to the API for the pcre_exec() function. An additional argument has been    *    Retrieving configuration information on Unix-like systems
24  * added to make it possible to start the match other than at the start of the *    Shared libraries on Unix-like systems
25  * subject string. This is important if there are lookbehinds. The new man     *    Cross-compiling on Unix-like systems
26  * page has the details, but you just want to convert existing programs, all   *    Using HP's ANSI C++ compiler (aCC)
27  * you need to do is to stick in a new fifth argument to pcre_exec(), with a   *    Using PCRE from MySQL
28  * value of zero. For example, change                                          *    Making new tarballs
29  *                                                                             *    Testing PCRE
30  *   pcre_exec(pattern, extra, subject, length, options, ovec, ovecsize)       *    Character tables
31  * to                                                                          *    File manifest
32  *   pcre_exec(pattern, extra, subject, length, 0, options, ovec, ovecsize)    *  
33  *******************************************************************************  
34    The PCRE APIs
35    -------------
36  The distribution should contain the following files:  
37    PCRE is written in C, and it has its own API. There are two sets of functions,
38    ChangeLog         log of changes to the code  one for the 8-bit library, which processes strings of bytes, and one for the
39    LICENCE           conditions for the use of PCRE  16-bit library, which processes strings of 16-bit values. The distribution also
40    Makefile          for building PCRE in Unix systems  includes a set of C++ wrapper functions (see the pcrecpp man page for details),
41    README            this file  courtesy of Google Inc., which can be used to call the 8-bit PCRE library from
42    RunTest           a Unix shell script for running tests  C++.
43    Tech.Notes        notes on the encoding  
44    pcre.3            man page source for the functions  In addition, there is a set of C wrapper functions (again, just for the 8-bit
45    pcre.3.txt        plain text version  library) that are based on the POSIX regular expression API (see the pcreposix
46    pcre.3.html       HTML version  man page). These end up in the library called libpcreposix. Note that this just
47    pcreposix.3       man page source for the POSIX wrapper API  provides a POSIX calling interface to PCRE; the regular expressions themselves
48    pcreposix.3.txt   plain text version  still follow Perl syntax and semantics. The POSIX API is restricted, and does
49    pcreposix.3.HTML  HTML version  not give full access to all of PCRE's facilities.
50    dftables.c        auxiliary program for building chartables.c  
51    get.c             )  The header file for the POSIX-style functions is called pcreposix.h. The
52    maketables.c      )  official POSIX name is regex.h, but I did not want to risk possible problems
53    study.c           ) source of  with existing files of that name by distributing it that way. To use PCRE with
54    pcre.c            )   the functions  an existing program that uses the POSIX API, pcreposix.h will have to be
55    pcreposix.c       )  renamed or pointed at by a link.
56    pcre.h            header for the external API  
57    pcreposix.h       header for the external POSIX wrapper API  If you are using the POSIX interface to PCRE and there is already a POSIX regex
58    internal.h        header for internal use  library installed on your system, as well as worrying about the regex.h header
59    pcretest.c        test program  file (as mentioned above), you must also take care when linking programs to
60    pgrep.1           man page source for pgrep  ensure that they link with PCRE's libpcreposix library. Otherwise they may pick
61    pgrep.1.txt       plain text version  up the POSIX functions of the same name from the other library.
62    pgrep.1.HTML      HTML version  
63    pgrep.c           source of a grep utility that uses PCRE  One way of avoiding this confusion is to compile PCRE with the addition of
64    perltest          Perl test program  -Dregcomp=PCREregcomp (and similarly for the other POSIX functions) to the
65    testinput1        test data, compatible with Perl 5.004 and 5.005  compiler flags (CFLAGS if you are using "configure" -- see below). This has the
66    testinput2        test data for error messages and non-Perl things  effect of renaming the functions so that the names no longer clash. Of course,
67    testinput3        test data, compatible with Perl 5.005  you have to do the same thing for your applications, or write them using the
68    testinput4        test data for locale-specific tests  new names.
69    testoutput1       test results corresponding to testinput1  
70    testoutput2       test results corresponding to testinput2  
71    testoutput3       test results corresponding to testinput3  Documentation for PCRE
72    testoutput4       test results corresponding to testinput4  ----------------------
73    dll.mk            for Win32 DLL  
74    pcre.def          ditto  If you install PCRE in the normal way on a Unix-like system, you will end up
75    with a set of man pages whose names all start with "pcre". The one that is just
76  To build PCRE on a Unix system, first edit Makefile for your system. It is a  called "pcre" lists all the others. In addition to these man pages, the PCRE
77  fairly simple make file, and there are some comments near the top, after the  documentation is supplied in two other forms:
78  text "On a Unix system". Then run "make". It builds two libraries called  
79  libpcre.a and libpcreposix.a, a test program called pcretest, and the pgrep    1. There are files called doc/pcre.txt, doc/pcregrep.txt, and
80  command. You can use "make install" to copy these, and the public header file       doc/pcretest.txt in the source distribution. The first of these is a
81  pcre.h, to appropriate live directories on your system. These installation       concatenation of the text forms of all the section 3 man pages except
82  directories are defined at the top of the Makefile, and you should edit them if       those that summarize individual functions. The other two are the text
83  necessary.       forms of the section 1 man pages for the pcregrep and pcretest commands.
84         These text forms are provided for ease of scanning with text editors or
85  For a non-Unix system, read the comments at the top of Makefile, which give       similar tools. They are installed in <prefix>/share/doc/pcre, where
86  some hints on what needs to be done. PCRE has been compiled on Windows systems       <prefix> is the installation prefix (defaulting to /usr/local).
87  and on Macintoshes, but I don't know the details as I don't use those systems.  
88  It should be straightforward to build PCRE on any system that has a Standard C    2. A set of files containing all the documentation in HTML form, hyperlinked
89         in various ways, and rooted in a file called index.html, is distributed in
90         doc/html and installed in <prefix>/share/doc/pcre/html.
91    
92    Users of PCRE have contributed files containing the documentation for various
93    releases in CHM format. These can be found in the Contrib directory of the FTP
94    site (see next section).
95    
96    
97    Contributions by users of PCRE
98    ------------------------------
99    
100    You can find contributions from PCRE users in the directory
101    
102      ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/Contrib
103    
104    There is a README file giving brief descriptions of what they are. Some are
105    complete in themselves; others are pointers to URLs containing relevant files.
106    Some of this material is likely to be well out-of-date. Several of the earlier
107    contributions provided support for compiling PCRE on various flavours of
108    Windows (I myself do not use Windows). Nowadays there is more Windows support
109    in the standard distribution, so these contibutions have been archived.
110    
111    
112    Building PCRE on non-Unix systems
113    ---------------------------------
114    
115    For a non-Unix system, please read the comments in the file NON-UNIX-USE,
116    though if your system supports the use of "configure" and "make" you may be
117    able to build PCRE in the same way as for Unix-like systems. PCRE can also be
118    configured in many platform environments using the GUI facility provided by
119    CMake's cmake-gui command. This creates Makefiles, solution files, etc.
120    
121    PCRE has been compiled on many different operating systems. It should be
122    straightforward to build PCRE on any system that has a Standard C compiler and
123    library, because it uses only Standard C functions.
124    
125    
126    Building PCRE on Unix-like systems
127    ----------------------------------
128    
129    If you are using HP's ANSI C++ compiler (aCC), please see the special note
130    in the section entitled "Using HP's ANSI C++ compiler (aCC)" below.
131    
132    The following instructions assume the use of the widely used "configure, make,
133    make install" process. There is also support for CMake in the PCRE
134    distribution; there are some comments about using CMake in the NON-UNIX-USE
135    file, though it can also be used in Unix-like systems.
136    
137    To build PCRE on a Unix-like system, first run the "configure" command from the
138    PCRE distribution directory, with your current directory set to the directory
139    where you want the files to be created. This command is a standard GNU
140    "autoconf" configuration script, for which generic instructions are supplied in
141    the file INSTALL.
142    
143    Most commonly, people build PCRE within its own distribution directory, and in
144    this case, on many systems, just running "./configure" is sufficient. However,
145    the usual methods of changing standard defaults are available. For example:
146    
147    CFLAGS='-O2 -Wall' ./configure --prefix=/opt/local
148    
149    This command specifies that the C compiler should be run with the flags '-O2
150    -Wall' instead of the default, and that "make install" should install PCRE
151    under /opt/local instead of the default /usr/local.
152    
153    If you want to build in a different directory, just run "configure" with that
154    directory as current. For example, suppose you have unpacked the PCRE source
155    into /source/pcre/pcre-xxx, but you want to build it in /build/pcre/pcre-xxx:
156    
157    cd /build/pcre/pcre-xxx
158    /source/pcre/pcre-xxx/configure
159    
160    PCRE is written in C and is normally compiled as a C library. However, it is
161    possible to build it as a C++ library, though the provided building apparatus
162    does not have any features to support this.
163    
164    There are some optional features that can be included or omitted from the PCRE
165    library. They are also documented in the pcrebuild man page.
166    
167    . By default, both shared and static libraries are built. You can change this
168      by adding one of these options to the "configure" command:
169    
170      --disable-shared
171      --disable-static
172    
173      (See also "Shared libraries on Unix-like systems" below.)
174    
175    . By default, only the 8-bit library is built. If you add --enable-pcre16 to
176      the "configure" command, the 16-bit library is also built. If you want only
177      the 16-bit library, use "./configure --enable-pcre16 --disable-pcre8".
178    
179    . If you are building the 8-bit library and want to suppress the building of
180      the C++ wrapper library, you can add --disable-cpp to the "configure"
181      command. Otherwise, when "configure" is run without --disable-pcre8, it will
182      try to find a C++ compiler and C++ header files, and if it succeeds, it will
183      try to build the C++ wrapper.
184    
185    . If you want to include support for just-in-time compiling, which can give
186      large performance improvements on certain platforms, add --enable-jit to the
187      "configure" command. This support is available only for certain hardware
188      architectures. If you try to enable it on an unsupported architecture, there
189      will be a compile time error.
190    
191    . When JIT support is enabled, pcregrep automatically makes use of it, unless
192      you add --disable-pcregrep-jit to the "configure" command.
193    
194    . If you want to make use of the support for UTF-8 Unicode character strings in
195      the 8-bit library, or UTF-16 Unicode character strings in the 16-bit library,
196      you must add --enable-utf to the "configure" command. Without it, the code
197      for handling UTF-8 and UTF-16 is not included in the relevant library. Even
198      when --enable-utf is included, the use of a UTF encoding still has to be
199      enabled by an option at run time. When PCRE is compiled with this option, its
200      input can only either be ASCII or UTF-8/16, even when running on EBCDIC
201      platforms. It is not possible to use both --enable-utf and --enable-ebcdic at
202      the same time.
203    
204    . There are no separate options for enabling UTF-8 and UTF-16 independently
205      because that would allow ridiculous settings such as requesting UTF-16
206      support while building only the 8-bit library. However, the option
207      --enable-utf8 is retained for backwards compatibility with earlier releases
208      that did not support 16-bit character strings. It is synonymous with
209      --enable-utf. It is not possible to configure one library with UTF support
210      and the other without in the same configuration.
211    
212    . If, in addition to support for UTF-8/16 character strings, you want to
213      include support for the \P, \p, and \X sequences that recognize Unicode
214      character properties, you must add --enable-unicode-properties to the
215      "configure" command. This adds about 30K to the size of the library (in the
216      form of a property table); only the basic two-letter properties such as Lu
217      are supported.
218    
219    . You can build PCRE to recognize either CR or LF or the sequence CRLF or any
220      of the preceding, or any of the Unicode newline sequences as indicating the
221      end of a line. Whatever you specify at build time is the default; the caller
222      of PCRE can change the selection at run time. The default newline indicator
223      is a single LF character (the Unix standard). You can specify the default
224      newline indicator by adding --enable-newline-is-cr or --enable-newline-is-lf
225      or --enable-newline-is-crlf or --enable-newline-is-anycrlf or
226      --enable-newline-is-any to the "configure" command, respectively.
227    
228      If you specify --enable-newline-is-cr or --enable-newline-is-crlf, some of
229      the standard tests will fail, because the lines in the test files end with
230      LF. Even if the files are edited to change the line endings, there are likely
231      to be some failures. With --enable-newline-is-anycrlf or
232      --enable-newline-is-any, many tests should succeed, but there may be some
233      failures.
234    
235    . By default, the sequence \R in a pattern matches any Unicode line ending
236      sequence. This is independent of the option specifying what PCRE considers to
237      be the end of a line (see above). However, the caller of PCRE can restrict \R
238      to match only CR, LF, or CRLF. You can make this the default by adding
239      --enable-bsr-anycrlf to the "configure" command (bsr = "backslash R").
240    
241    . When called via the POSIX interface, PCRE uses malloc() to get additional
242      storage for processing capturing parentheses if there are more than 10 of
243      them in a pattern. You can increase this threshold by setting, for example,
244    
245      --with-posix-malloc-threshold=20
246    
247      on the "configure" command.
248    
249    . PCRE has a counter that can be set to limit the amount of resources it uses.
250      If the limit is exceeded during a match, the match fails. The default is ten
251      million. You can change the default by setting, for example,
252    
253      --with-match-limit=500000
254    
255      on the "configure" command. This is just the default; individual calls to
256      pcre_exec() can supply their own value. There is more discussion on the
257      pcreapi man page.
258    
259    . There is a separate counter that limits the depth of recursive function calls
260      during a matching process. This also has a default of ten million, which is
261      essentially "unlimited". You can change the default by setting, for example,
262    
263      --with-match-limit-recursion=500000
264    
265      Recursive function calls use up the runtime stack; running out of stack can
266      cause programs to crash in strange ways. There is a discussion about stack
267      sizes in the pcrestack man page.
268    
269    . The default maximum compiled pattern size is around 64K. You can increase
270      this by adding --with-link-size=3 to the "configure" command. In the 8-bit
271      library, PCRE then uses three bytes instead of two for offsets to different
272      parts of the compiled pattern. In the 16-bit library, --with-link-size=3 is
273      the same as --with-link-size=4, which (in both libraries) uses four-byte
274      offsets. Increasing the internal link size reduces performance.
275    
276    . You can build PCRE so that its internal match() function that is called from
277      pcre_exec() does not call itself recursively. Instead, it uses memory blocks
278      obtained from the heap via the special functions pcre_stack_malloc() and
279      pcre_stack_free() to save data that would otherwise be saved on the stack. To
280      build PCRE like this, use
281    
282      --disable-stack-for-recursion
283    
284      on the "configure" command. PCRE runs more slowly in this mode, but it may be
285      necessary in environments with limited stack sizes. This applies only to the
286      normal execution of the pcre_exec() function; if JIT support is being
287      successfully used, it is not relevant. Equally, it does not apply to
288      pcre_dfa_exec(), which does not use deeply nested recursion. There is a
289      discussion about stack sizes in the pcrestack man page.
290    
291    . For speed, PCRE uses four tables for manipulating and identifying characters
292      whose code point values are less than 256. By default, it uses a set of
293      tables for ASCII encoding that is part of the distribution. If you specify
294    
295      --enable-rebuild-chartables
296    
297      a program called dftables is compiled and run in the default C locale when
298      you obey "make". It builds a source file called pcre_chartables.c. If you do
299      not specify this option, pcre_chartables.c is created as a copy of
300      pcre_chartables.c.dist. See "Character tables" below for further information.
301    
302    . It is possible to compile PCRE for use on systems that use EBCDIC as their
303      character code (as opposed to ASCII) by specifying
304    
305      --enable-ebcdic
306    
307      This automatically implies --enable-rebuild-chartables (see above). However,
308      when PCRE is built this way, it always operates in EBCDIC. It cannot support
309      both EBCDIC and UTF-8/16.
310    
311    . The pcregrep program currently supports only 8-bit data files, and so
312      requires the 8-bit PCRE library. It is possible to compile pcregrep to use
313      libz and/or libbz2, in order to read .gz and .bz2 files (respectively), by
314      specifying one or both of
315    
316      --enable-pcregrep-libz
317      --enable-pcregrep-libbz2
318    
319      Of course, the relevant libraries must be installed on your system.
320    
321    . The default size of internal buffer used by pcregrep can be set by, for
322      example:
323    
324      --with-pcregrep-bufsize=50K
325    
326      The default value is 20K.
327    
328    . It is possible to compile pcretest so that it links with the libreadline
329      library, by specifying
330    
331      --enable-pcretest-libreadline
332    
333      If this is done, when pcretest's input is from a terminal, it reads it using
334      the readline() function. This provides line-editing and history facilities.
335      Note that libreadline is GPL-licenced, so if you distribute a binary of
336      pcretest linked in this way, there may be licensing issues.
337    
338      Setting this option causes the -lreadline option to be added to the pcretest
339      build. In many operating environments with a sytem-installed readline
340      library this is sufficient. However, in some environments (e.g. if an
341      unmodified distribution version of readline is in use), it may be necessary
342      to specify something like LIBS="-lncurses" as well. This is because, to quote
343      the readline INSTALL, "Readline uses the termcap functions, but does not link
344      with the termcap or curses library itself, allowing applications which link
345      with readline the to choose an appropriate library." If you get error
346      messages about missing functions tgetstr, tgetent, tputs, tgetflag, or tgoto,
347      this is the problem, and linking with the ncurses library should fix it.
348    
349    The "configure" script builds the following files for the basic C library:
350    
351    . Makefile             the makefile that builds the library
352    . config.h             build-time configuration options for the library
353    . pcre.h               the public PCRE header file
354    . pcre-config          script that shows the building settings such as CFLAGS
355                             that were set for "configure"
356    . libpcre.pc         ) data for the pkg-config command
357    . libpcre16.pc       )
358    . libpcreposix.pc    )
359    . libtool              script that builds shared and/or static libraries
360    . RunTest              script for running tests on the basic C library
361    . RunGrepTest          script for running tests on the pcregrep command
362    
363    Versions of config.h and pcre.h are distributed in the PCRE tarballs under the
364    names config.h.generic and pcre.h.generic. These are provided for those who
365    have to built PCRE without using "configure" or CMake. If you use "configure"
366    or CMake, the .generic versions are not used.
367    
368    When building the 8-bit library, if a C++ compiler is found, the following
369    files are also built:
370    
371    . libpcrecpp.pc        data for the pkg-config command
372    . pcrecpparg.h         header file for calling PCRE via the C++ wrapper
373    . pcre_stringpiece.h   header for the C++ "stringpiece" functions
374    
375    The "configure" script also creates config.status, which is an executable
376    script that can be run to recreate the configuration, and config.log, which
377    contains compiler output from tests that "configure" runs.
378    
379    Once "configure" has run, you can run "make". This builds either or both of the
380    libraries libpcre and libpcre16, and a test program called pcretest. If you
381    enabled JIT support with --enable-jit, a test program called pcre_jit_test is
382    built as well.
383    
384    If the 8-bit library is built, libpcreposix and the pcregrep command are also
385    built, and if a C++ compiler was found on your system, and you did not disable
386    it with --disable-cpp, "make" builds the C++ wrapper library, which is called
387    libpcrecpp, as well as some test programs called pcrecpp_unittest,
388    pcre_scanner_unittest, and pcre_stringpiece_unittest.
389    
390    The command "make check" runs all the appropriate tests. Details of the PCRE
391    tests are given below in a separate section of this document.
392    
393    You can use "make install" to install PCRE into live directories on your
394    system. The following are installed (file names are all relative to the
395    <prefix> that is set when "configure" is run):
396    
397      Commands (bin):
398        pcretest
399        pcregrep (if 8-bit support is enabled)
400        pcre-config
401    
402      Libraries (lib):
403        libpcre16     (if 16-bit support is enabled)
404        libpcre       (if 8-bit support is enabled)
405        libpcreposix  (if 8-bit support is enabled)
406        libpcrecpp    (if 8-bit and C++ support is enabled)
407    
408      Configuration information (lib/pkgconfig):
409        libpcre16.pc
410        libpcre.pc
411        libpcreposix.pc
412        libpcrecpp.pc (if C++ support is enabled)
413    
414      Header files (include):
415        pcre.h
416        pcreposix.h
417        pcre_scanner.h      )
418        pcre_stringpiece.h  ) if C++ support is enabled
419        pcrecpp.h           )
420        pcrecpparg.h        )
421    
422      Man pages (share/man/man{1,3}):
423        pcregrep.1
424        pcretest.1
425        pcre-config.1
426        pcre.3
427        pcre*.3 (lots more pages, all starting "pcre")
428    
429      HTML documentation (share/doc/pcre/html):
430        index.html
431        *.html (lots more pages, hyperlinked from index.html)
432    
433      Text file documentation (share/doc/pcre):
434        AUTHORS
435        COPYING
436        ChangeLog
437        LICENCE
438        NEWS
439        README
440        pcre.txt         (a concatenation of the man(3) pages)
441        pcretest.txt     the pcretest man page
442        pcregrep.txt     the pcregrep man page
443        pcre-config.txt  the pcre-config man page
444    
445    If you want to remove PCRE from your system, you can run "make uninstall".
446    This removes all the files that "make install" installed. However, it does not
447    remove any directories, because these are often shared with other programs.
448    
449    
450    Retrieving configuration information on Unix-like systems
451    ---------------------------------------------------------
452    
453    Running "make install" installs the command pcre-config, which can be used to
454    recall information about the PCRE configuration and installation. For example:
455    
456      pcre-config --version
457    
458    prints the version number, and
459    
460      pcre-config --libs
461    
462    outputs information about where the library is installed. This command can be
463    included in makefiles for programs that use PCRE, saving the programmer from
464    having to remember too many details.
465    
466    The pkg-config command is another system for saving and retrieving information
467    about installed libraries. Instead of separate commands for each library, a
468    single command is used. For example:
469    
470      pkg-config --cflags pcre
471    
472    The data is held in *.pc files that are installed in a directory called
473    <prefix>/lib/pkgconfig.
474    
475    
476    Shared libraries on Unix-like systems
477    -------------------------------------
478    
479    The default distribution builds PCRE as shared libraries and static libraries,
480    as long as the operating system supports shared libraries. Shared library
481    support relies on the "libtool" script which is built as part of the
482    "configure" process.
483    
484    The libtool script is used to compile and link both shared and static
485    libraries. They are placed in a subdirectory called .libs when they are newly
486    built. The programs pcretest and pcregrep are built to use these uninstalled
487    libraries (by means of wrapper scripts in the case of shared libraries). When
488    you use "make install" to install shared libraries, pcregrep and pcretest are
489    automatically re-built to use the newly installed shared libraries before being
490    installed themselves. However, the versions left in the build directory still
491    use the uninstalled libraries.
492    
493    To build PCRE using static libraries only you must use --disable-shared when
494    configuring it. For example:
495    
496    ./configure --prefix=/usr/gnu --disable-shared
497    
498    Then run "make" in the usual way. Similarly, you can use --disable-static to
499    build only shared libraries.
500    
501    
502    Cross-compiling on Unix-like systems
503    ------------------------------------
504    
505    You can specify CC and CFLAGS in the normal way to the "configure" command, in
506    order to cross-compile PCRE for some other host. However, you should NOT
507    specify --enable-rebuild-chartables, because if you do, the dftables.c source
508    file is compiled and run on the local host, in order to generate the inbuilt
509    character tables (the pcre_chartables.c file). This will probably not work,
510    because dftables.c needs to be compiled with the local compiler, not the cross
511  compiler.  compiler.
512    
513  Some help in building a Win32 DLL of PCRE in GnuWin32 environments was  When --enable-rebuild-chartables is not specified, pcre_chartables.c is created
514  contributed by Paul.Sokolovsky@technologist.com. These environments are  by making a copy of pcre_chartables.c.dist, which is a default set of tables
515  Mingw32 (http://www.xraylith.wisc.edu/~khan/software/gnu-win32/) and  that assumes ASCII code. Cross-compiling with the default tables should not be
516  CygWin  (http://sourceware.cygnus.com/cygwin/). Paul comments:  a problem.
517    
518    For CygWin, set CFLAGS=-mno-cygwin, and do 'make dll'. You'll get  If you need to modify the character tables when cross-compiling, you should
519    pcre.dll (containing pcreposix also), libpcre.dll.a, and dynamically  move pcre_chartables.c.dist out of the way, then compile dftables.c by hand and
520    linked pgrep and pcretest. If you have /bin/sh, run RunTest (three  run it on the local host to make a new version of pcre_chartables.c.dist.
521    main test go ok, locale not supported).  Then when you cross-compile PCRE this new version of the tables will be used.
522    
523  To test PCRE, run the RunTest script in the pcre directory. This can also be  
524  run by "make runtest". It runs the pcretest test program (which is documented  Using HP's ANSI C++ compiler (aCC)
525  below) on each of the testinput files in turn, and compares the output with the  ----------------------------------
526  contents of the corresponding testoutput file. A file called testtry is used to  
527  hold the output from pcretest. To run pcretest on just one of the test files,  Unless C++ support is disabled by specifying the "--disable-cpp" option of the
528  give its number as an argument to RunTest, for example:  "configure" script, you must include the "-AA" option in the CXXFLAGS
529    environment variable in order for the C++ components to compile correctly.
530    RunTest 3  
531    Also, note that the aCC compiler on PA-RISC platforms may have a defect whereby
532  The first and third test files can also be fed directly into the perltest  needed libraries fail to get included when specifying the "-AA" compiler
533  script to check that Perl gives the same results. The third file requires the  option. If you experience unresolved symbols when linking the C++ programs,
534  additional features of release 5.005, which is why it is kept separate from the  use the workaround of specifying the following environment variable prior to
535  main test input, which needs only Perl 5.004. In the long run, when 5.005 is  running the "configure" script:
536  widespread, these two test files may get amalgamated.  
537      CXXLDFLAGS="-lstd_v2 -lCsup_v2"
538  The second set of tests check pcre_info(), pcre_study(), pcre_copy_substring(),  
539  pcre_get_substring(), pcre_get_substring_list(), error detection and run-time  
540  flags that are specific to PCRE, as well as the POSIX wrapper API.  Using Sun's compilers for Solaris
541    ---------------------------------
542    
543    A user reports that the following configurations work on Solaris 9 sparcv9 and
544    Solaris 9 x86 (32-bit):
545    
546      Solaris 9 sparcv9: ./configure --disable-cpp CC=/bin/cc CFLAGS="-m64 -g"
547      Solaris 9 x86:     ./configure --disable-cpp CC=/bin/cc CFLAGS="-g"
548    
549    
550    Using PCRE from MySQL
551    ---------------------
552    
553    On systems where both PCRE and MySQL are installed, it is possible to make use
554    of PCRE from within MySQL, as an alternative to the built-in pattern matching.
555    There is a web page that tells you how to do this:
556    
557      http://www.mysqludf.org/lib_mysqludf_preg/index.php
558    
559    
560    Making new tarballs
561    -------------------
562    
563    The command "make dist" creates three PCRE tarballs, in tar.gz, tar.bz2, and
564    zip formats. The command "make distcheck" does the same, but then does a trial
565    build of the new distribution to ensure that it works.
566    
567  The fourth set of tests checks pcre_maketables(), the facility for building a  If you have modified any of the man page sources in the doc directory, you
568    should first run the PrepareRelease script before making a distribution. This
569    script creates the .txt and HTML forms of the documentation from the man pages.
570    
571    
572    Testing PCRE
573    ------------
574    
575    To test the basic PCRE library on a Unix system, run the RunTest script that is
576    created by the configuring process. There is also a script called RunGrepTest
577    that tests the options of the pcregrep command. If the C++ wrapper library is
578    built, three test programs called pcrecpp_unittest, pcre_scanner_unittest, and
579    pcre_stringpiece_unittest are also built. When JIT support is enabled, another
580    test program called pcre_jit_test is built.
581    
582    Both the scripts and all the program tests are run if you obey "make check" or
583    "make test". For other systems, see the instructions in NON-UNIX-USE.
584    
585    The RunTest script runs the pcretest test program (which is documented in its
586    own man page) on each of the relevant testinput files in the testdata
587    directory, and compares the output with the contents of the corresponding
588    testoutput files. Some tests are relevant only when certain build-time options
589    were selected. For example, the tests for UTF-8/16 support are run only if
590    --enable-utf was used. RunTest outputs a comment when it skips a test.
591    
592    Many of the tests that are not skipped are run up to three times. The second
593    run forces pcre_study() to be called for all patterns except for a few in some
594    tests that are marked "never study" (see the pcretest program for how this is
595    done). If JIT support is available, the non-DFA tests are run a third time,
596    this time with a forced pcre_study() with the PCRE_STUDY_JIT_COMPILE option.
597    
598    When both 8-bit and 16-bit support is enabled, the entire set of tests is run
599    twice, once for each library. If you want to run just one set of tests, call
600    RunTest with either the -8 or -16 option.
601    
602    RunTest uses a file called testtry to hold the main output from pcretest.
603    Other files whose names begin with "test" are used as working files in some
604    tests. To run pcretest on just one or more specific test files, give their
605    numbers as arguments to RunTest, for example:
606    
607      RunTest 2 7 11
608    
609    The first test file can be fed directly into the perltest.pl script to check
610    that Perl gives the same results. The only difference you should see is in the
611    first few lines, where the Perl version is given instead of the PCRE version.
612    
613    The second set of tests check pcre_fullinfo(), pcre_study(),
614    pcre_copy_substring(), pcre_get_substring(), pcre_get_substring_list(), error
615    detection, and run-time flags that are specific to PCRE, as well as the POSIX
616    wrapper API. It also uses the debugging flags to check some of the internals of
617    pcre_compile().
618    
619    If you build PCRE with a locale setting that is not the standard C locale, the
620    character tables may be different (see next paragraph). In some cases, this may
621    cause failures in the second set of tests. For example, in a locale where the
622    isprint() function yields TRUE for characters in the range 128-255, the use of
623    [:isascii:] inside a character class defines a different set of characters, and
624    this shows up in this test as a difference in the compiled code, which is being
625    listed for checking. Where the comparison test output contains [\x00-\x7f] the
626    test will contain [\x00-\xff], and similarly in some other cases. This is not a
627    bug in PCRE.
628    
629    The third set of tests checks pcre_maketables(), the facility for building a
630  set of character tables for a specific locale and using them instead of the  set of character tables for a specific locale and using them instead of the
631  default tables. The tests make use of the "fr" (French) locale. Before running  default tables. The tests make use of the "fr_FR" (French) locale. Before
632  the test, the script checks for the presence of this locale by running the  running the test, the script checks for the presence of this locale by running
633  "locale" command. If that command fails, or if it doesn't include "fr" in the  the "locale" command. If that command fails, or if it doesn't include "fr_FR"
634  list of available locales, the fourth test cannot be run, and a comment is  in the list of available locales, the third test cannot be run, and a comment
635  output to say why. If running this test produces instances of the error  is output to say why. If running this test produces instances of the error
636    
637    ** Failed to set locale "fr"    ** Failed to set locale "fr_FR"
638    
639  in the comparison output, it means that locale is not available on your system,  in the comparison output, it means that locale is not available on your system,
640  despite being listed by "locale". This does not mean that PCRE is broken.  despite being listed by "locale". This does not mean that PCRE is broken.
641    
642  PCRE has its own native API, but a set of "wrapper" functions that are based on  [If you are trying to run this test on Windows, you may be able to get it to
643  the POSIX API are also supplied in the library libpcreposix.a. Note that this  work by changing "fr_FR" to "french" everywhere it occurs. Alternatively, use
644  just provides a POSIX calling interface to PCRE: the regular expressions  RunTest.bat. The version of RunTest.bat included with PCRE 7.4 and above uses
645  themselves still follow Perl syntax and semantics. The header file  Windows versions of test 2. More info on using RunTest.bat is included in the
646  for the POSIX-style functions is called pcreposix.h. The official POSIX name is  document entitled NON-UNIX-USE.]
647  regex.h, but I didn't want to risk possible problems with existing files of  
648  that name by distributing it that way. To use it with an existing program that  The fourth and fifth tests check the UTF-8/16 support and error handling and
649  uses the POSIX API, it will have to be renamed or pointed at by a link.  internal UTF features of PCRE that are not relevant to Perl, respectively. The
650    sixth and seventh tests do the same for Unicode character properties support.
651    
652    The eighth, ninth, and tenth tests check the pcre_dfa_exec() alternative
653    matching function, in non-UTF-8/16 mode, UTF-8/16 mode, and UTF-8/16 mode with
654    Unicode property support, respectively.
655    
656    The eleventh test checks some internal offsets and code size features; it is
657    run only when the default "link size" of 2 is set (in other cases the sizes
658    change) and when Unicode property support is enabled.
659    
660    The twelfth test is run only when JIT support is available, and the thirteenth
661    test is run only when JIT support is not available. They test some JIT-specific
662    features such as information output from pcretest about JIT compilation.
663    
664    The fourteenth, fifteenth, and sixteenth tests are run only in 8-bit mode, and
665    the seventeenth, eighteenth, and nineteenth tests are run only in 16-bit mode.
666    These are tests that generate different output in the two modes. They are for
667    general cases, UTF-8/16 support, and Unicode property support, respectively.
668    
669    The twentieth test is run only in 16-bit mode. It tests some specific 16-bit
670    features of the DFA matching engine.
671    
672    
673  Character tables  Character tables
674  ----------------  ----------------
675    
676  PCRE uses four tables for manipulating and identifying characters. The final  For speed, PCRE uses four tables for manipulating and identifying characters
677  argument of the pcre_compile() function is a pointer to a block of memory  whose code point values are less than 256. The final argument of the
678  containing the concatenated tables. A call to pcre_maketables() can be used to  pcre_compile() function is a pointer to a block of memory containing the
679  generate a set of tables in the current locale. If the final argument for  concatenated tables. A call to pcre_maketables() can be used to generate a set
680  pcre_compile() is passed as NULL, a set of default tables that is built into  of tables in the current locale. If the final argument for pcre_compile() is
681  the binary is used.  passed as NULL, a set of default tables that is built into the binary is used.
682    
683  The source file called chartables.c contains the default set of tables. This is  The source file called pcre_chartables.c contains the default set of tables. By
684  not supplied in the distribution, but is built by the program dftables  default, this is created as a copy of pcre_chartables.c.dist, which contains
685  (compiled from dftables.c), which uses the ANSI C character handling functions  tables for ASCII coding. However, if --enable-rebuild-chartables is specified
686  such as isalnum(), isalpha(), isupper(), islower(), etc. to build the table  for ./configure, a different version of pcre_chartables.c is built by the
687  sources. This means that the default C locale which is set for your system will  program dftables (compiled from dftables.c), which uses the ANSI C character
688  control the contents of these default tables. You can change the default tables  handling functions such as isalnum(), isalpha(), isupper(), islower(), etc. to
689  by editing chartables.c and then re-building PCRE. If you do this, you should  build the table sources. This means that the default C locale which is set for
690  probably also edit Makefile to ensure that the file doesn't ever get  your system will control the contents of these default tables. You can change
691  re-generated.  the default tables by editing pcre_chartables.c and then re-building PCRE. If
692    you do this, you should take care to ensure that the file does not get
693    automatically re-generated. The best way to do this is to move
694    pcre_chartables.c.dist out of the way and replace it with your customized
695    tables.
696    
697    When the dftables program is run as a result of --enable-rebuild-chartables,
698    it uses the default C locale that is set on your system. It does not pay
699    attention to the LC_xxx environment variables. In other words, it uses the
700    system's default locale rather than whatever the compiling user happens to have
701    set. If you really do want to build a source set of character tables in a
702    locale that is specified by the LC_xxx variables, you can run the dftables
703    program by hand with the -L option. For example:
704    
705      ./dftables -L pcre_chartables.c.special
706    
707  The first two 256-byte tables provide lower casing and case flipping functions,  The first two 256-byte tables provide lower casing and case flipping functions,
708  respectively. The next table consists of three 32-byte bit maps which identify  respectively. The next table consists of three 32-byte bit maps which identify
709  digits, "word" characters, and white space, respectively. These are used when  digits, "word" characters, and white space, respectively. These are used when
710  building 32-byte bit maps that represent character classes.  building 32-byte bit maps that represent character classes for code points less
711    than 256.
712    
713  The final 256-byte table has bits indicating various character types, as  The final 256-byte table has bits indicating various character types, as
714  follows:  follows:
# Line 179  You should not alter the set of characte Line 724  You should not alter the set of characte
724  will cause PCRE to malfunction.  will cause PCRE to malfunction.
725    
726    
727  The pcretest program  File manifest
728  --------------------  -------------
   
 This program is intended for testing PCRE, but it can also be used for  
 experimenting with regular expressions.  
   
 If it is given two filename arguments, it reads from the first and writes to  
 the second. If it is given only one filename argument, it reads from that file  
 and writes to stdout. Otherwise, it reads from stdin and writes to stdout, and  
 prompts for each line of input.  
   
 The program handles any number of sets of input on a single input file. Each  
 set starts with a regular expression, and continues with any number of data  
 lines to be matched against the pattern. An empty line signals the end of the  
 set. The regular expressions are given enclosed in any non-alphameric  
 delimiters other than backslash, for example  
   
   /(a|bc)x+yz/  
   
 White space before the initial delimiter is ignored. A regular expression may  
 be continued over several input lines, in which case the newline characters are  
 included within it. See the testinput files for many examples. It is possible  
 to include the delimiter within the pattern by escaping it, for example  
   
   /abc\/def/  
   
 If you do so, the escape and the delimiter form part of the pattern, but since  
 delimiters are always non-alphameric, this does not affect its interpretation.  
 If the terminating delimiter is immediately followed by a backslash, for  
 example,  
   
   /abc/\  
   
 then a backslash is added to the end of the pattern. This is done to provide a  
 way of testing the error condition that arises if a pattern finishes with a  
 backslash, because  
   
   /abc\/  
   
 is interpreted as the first line of a pattern that starts with "abc/", causing  
 pcretest to read the next line as a continuation of the regular expression.  
   
 The pattern may be followed by i, m, s, or x to set the PCRE_CASELESS,  
 PCRE_MULTILINE, PCRE_DOTALL, or PCRE_EXTENDED options, respectively. For  
 example:  
   
   /caseless/i  
   
 These modifier letters have the same effect as they do in Perl. There are  
 others which set PCRE options that do not correspond to anything in Perl: /A,  
 /E, and /X set PCRE_ANCHORED, PCRE_DOLLAR_ENDONLY, and PCRE_EXTRA respectively.  
   
 Searching for all possible matches within each subject string can be requested  
 by the /g or /G modifier. After finding a match, PCRE is called again to search  
 the remainder of the subject string. The difference between /g and /G is that  
 the former uses the startoffset argument to pcre_exec() to start searching at  
 a new point within the entire string (which is in effect what Perl does),  
 whereas the latter passes over a shortened substring. This makes a difference  
 to the matching process if the pattern begins with a lookbehind assertion  
 (including \b or \B).  
   
 If any call to pcre_exec() in a /g or /G sequence matches an empty string, the  
 next call is done with the PCRE_NOTEMPTY flag set so that it cannot match an  
 empty string again. This imitates the way Perl handles such cases when using  
 the /g modifier or the split() function.  
   
 There are a number of other modifiers for controlling the way pcretest  
 operates.  
   
 The /+ modifier requests that as well as outputting the substring that matched  
 the entire pattern, pcretest should in addition output the remainder of the  
 subject string. This is useful for tests where the subject contains multiple  
 copies of the same substring.  
   
 The /L modifier must be followed directly by the name of a locale, for example,  
   
   /pattern/Lfr  
   
 For this reason, it must be the last modifier letter. The given locale is set,  
 pcre_maketables() is called to build a set of character tables for the locale,  
 and this is then passed to pcre_compile() when compiling the regular  
 expression. Without an /L modifier, NULL is passed as the tables pointer; that  
 is, /L applies only to the expression on which it appears.  
   
 The /I modifier requests that pcretest output information about the compiled  
 expression (whether it is anchored, has a fixed first character, and so on). It  
 does this by calling pcre_info() after compiling an expression, and outputting  
 the information it gets back. If the pattern is studied, the results of that  
 are also output.  
   
 The /D modifier is a PCRE debugging feature, which also assumes /I. It causes  
 the internal form of compiled regular expressions to be output after  
 compilation.  
   
 The /S modifier causes pcre_study() to be called after the expression has been  
 compiled, and the results used when the expression is matched.  
   
 The /M modifier causes the size of memory block used to hold the compiled  
 pattern to be output.  
   
 Finally, the /P modifier causes pcretest to call PCRE via the POSIX wrapper API  
 rather than its native API. When this is done, all other modifiers except /i,  
 /m, and /+ are ignored. REG_ICASE is set if /i is present, and REG_NEWLINE is  
 set if /m is present. The wrapper functions force PCRE_DOLLAR_ENDONLY always,  
 and PCRE_DOTALL unless REG_NEWLINE is set.  
   
 Before each data line is passed to pcre_exec(), leading and trailing whitespace  
 is removed, and it is then scanned for \ escapes. The following are recognized:  
   
   \a     alarm (= BEL)  
   \b     backspace  
   \e     escape  
   \f     formfeed  
   \n     newline  
   \r     carriage return  
   \t     tab  
   \v     vertical tab  
   \nnn   octal character (up to 3 octal digits)  
   \xhh   hexadecimal character (up to 2 hex digits)  
   
   \A     pass the PCRE_ANCHORED option to pcre_exec()  
   \B     pass the PCRE_NOTBOL option to pcre_exec()  
   \Cdd   call pcre_copy_substring() for substring dd after a successful match  
            (any decimal number less than 32)  
   \Gdd   call pcre_get_substring() for substring dd after a successful match  
            (any decimal number less than 32)  
   \L     call pcre_get_substringlist() after a successful match  
   \N     pass the PCRE_NOTEMPTY option to pcre_exec()  
   \Odd   set the size of the output vector passed to pcre_exec() to dd  
            (any number of decimal digits)  
   \Z     pass the PCRE_NOTEOL option to pcre_exec()  
   
 A backslash followed by anything else just escapes the anything else. If the  
 very last character is a backslash, it is ignored. This gives a way of passing  
 an empty line as data, since a real empty line terminates the data input.  
   
 If /P was present on the regex, causing the POSIX wrapper API to be used, only  
 \B, and \Z have any effect, causing REG_NOTBOL and REG_NOTEOL to be passed to  
 regexec() respectively.  
   
 When a match succeeds, pcretest outputs the list of captured substrings that  
 pcre_exec() returns, starting with number 0 for the string that matched the  
 whole pattern. Here is an example of an interactive pcretest run.  
   
   $ pcretest  
   PCRE version 2.06 08-Jun-1999  
   
     re> /^abc(\d+)/  
   data> abc123  
    0: abc123  
    1: 123  
   data> xyz  
   No match  
   
 If the strings contain any non-printing characters, they are output as \0x  
 escapes. If the pattern has the /+ modifier, then the output for substring 0 is  
 followed by the the rest of the subject string, identified by "0+" like this:  
   
     re> /cat/+  
   data> cataract  
    0: cat  
    0+ aract  
   
 If the pattern has the /g or /G modifier, the results of successive matching  
 attempts are output in sequence, like this:  
   
     re> /\Bi(\w\w)/g  
   data> Mississippi  
    0: iss  
    1: ss  
    0: iss  
    1: ss  
    0: ipp  
    1: pp  
   
 "No match" is output only if the first match attempt fails.  
   
 If any of \C, \G, or \L are present in a data line that is successfully  
 matched, the substrings extracted by the convenience functions are output with  
 C, G, or L after the string number instead of a colon. This is in addition to  
 the normal full list. The string length (that is, the return from the  
 extraction function) is given in parentheses after each string for \C and \G.  
   
 Note that while patterns can be continued over several lines (a plain ">"  
 prompt is used for continuations), data lines may not. However newlines can be  
 included in data by means of the \n escape.  
   
 If the -p option is given to pcretest, it is equivalent to adding /P to each  
 regular expression: the POSIX wrapper API is used to call PCRE. None of the  
 following flags has any effect in this case.  
   
 If the option -d is given to pcretest, it is equivalent to adding /D to each  
 regular expression: the internal form is output after compilation.  
   
 If the option -i is given to pcretest, it is equivalent to adding /I to each  
 regular expression: information about the compiled pattern is given after  
 compilation.  
   
 If the option -m is given to pcretest, it outputs the size of each compiled  
 pattern after it has been compiled. It is equivalent to adding /M to each  
 regular expression. For compatibility with earlier versions of pcretest, -s is  
 a synonym for -m.  
   
 If the -t option is given, each compile, study, and match is run 20000 times  
 while being timed, and the resulting time per compile or match is output in  
 milliseconds. Do not set -t with -s, because you will then get the size output  
 20000 times and the timing will be distorted. If you want to change the number  
 of repetitions used for timing, edit the definition of LOOPREPEAT at the top of  
 pcretest.c  
   
   
   
 The perltest program  
 --------------------  
   
 The perltest program tests Perl's regular expressions; it has the same  
 specification as pcretest, and so can be given identical input, except that  
 input patterns can be followed only by Perl's lower case modifiers. The  
 contents of testinput1 and testinput3 meet this condition.  
   
 The data lines are processed as Perl double-quoted strings, so if they contain  
 " \ $ or @ characters, these have to be escaped. For this reason, all such  
 characters in testinput1 and testinput3 are escaped so that they can be used  
 for perltest as well as for pcretest, and the special upper case modifiers such  
 as /A that pcretest recognizes are not used in these files. The output should  
 be identical, apart from the initial identifying banner.  
   
 The testinput2 and testinput4 files are not suitable for feeding to perltest,  
 since they do make use of the special upper case modifiers and escapes that  
 pcretest uses to test some features of PCRE. The first of these files also  
 contains malformed regular expressions, in order to check that PCRE diagnoses  
 them correctly.  
729    
730  Philip Hazel <ph10@cam.ac.uk>  The distribution should contain the files listed below. Where a file name is
731  July 1999  given as pcre[16]_xxx it means that there are two files, one with the name
732    pcre_xxx and the other with the name pcre16_xxx.
733    
734    (A) Source files of the PCRE library functions and their headers:
735    
736      dftables.c              auxiliary program for building pcre_chartables.c
737                                when --enable-rebuild-chartables is specified
738    
739      pcre_chartables.c.dist  a default set of character tables that assume ASCII
740                                coding; used, unless --enable-rebuild-chartables is
741                                specified, by copying to pcre[16]_chartables.c
742    
743      pcreposix.c             )
744      pcre[16]_byte_order.c   )
745      pcre[16]_compile.c      )
746      pcre[16]_config.c       )
747      pcre[16]_dfa_exec.c     )
748      pcre[16]_exec.c         )
749      pcre[16]_fullinfo.c     )
750      pcre[16]_get.c          ) sources for the functions in the library,
751      pcre[16]_globals.c      )   and some internal functions that they use
752      pcre[16]_jit_compile.c  )
753      pcre[16]_maketables.c   )
754      pcre[16]_newline.c      )
755      pcre[16]_refcount.c     )
756      pcre[16]_string_utils.c )
757      pcre[16]_study.c        )
758      pcre[16]_tables.c       )
759      pcre[16]_ucd.c          )
760      pcre[16]_version.c      )
761      pcre[16]_xclass.c       )
762      pcre_ord2utf8.c         )
763      pcre_valid_utf8.c       )
764      pcre16_ord2utf16.c      )
765      pcre16_utf16_utils.c    )
766      pcre16_valid_utf16.c    )
767    
768      pcre[16]_printint.c     ) debugging function that is used by pcretest,
769                              )   and can also be #included in pcre_compile()
770    
771      pcre.h.in               template for pcre.h when built by "configure"
772      pcreposix.h             header for the external POSIX wrapper API
773      pcre_internal.h         header for internal use
774      sljit/*                 16 files that make up the JIT compiler
775      ucp.h                   header for Unicode property handling
776    
777      config.h.in             template for config.h, which is built by "configure"
778    
779      pcrecpp.h               public header file for the C++ wrapper
780      pcrecpparg.h.in         template for another C++ header file
781      pcre_scanner.h          public header file for C++ scanner functions
782      pcrecpp.cc              )
783      pcre_scanner.cc         ) source for the C++ wrapper library
784    
785      pcre_stringpiece.h.in   template for pcre_stringpiece.h, the header for the
786                                C++ stringpiece functions
787      pcre_stringpiece.cc     source for the C++ stringpiece functions
788    
789    (B) Source files for programs that use PCRE:
790    
791      pcredemo.c              simple demonstration of coding calls to PCRE
792      pcregrep.c              source of a grep utility that uses PCRE
793      pcretest.c              comprehensive test program
794    
795    (C) Auxiliary files:
796    
797      132html                 script to turn "man" pages into HTML
798      AUTHORS                 information about the author of PCRE
799      ChangeLog               log of changes to the code
800      CleanTxt                script to clean nroff output for txt man pages
801      Detrail                 script to remove trailing spaces
802      HACKING                 some notes about the internals of PCRE
803      INSTALL                 generic installation instructions
804      LICENCE                 conditions for the use of PCRE
805      COPYING                 the same, using GNU's standard name
806      Makefile.in             ) template for Unix Makefile, which is built by
807                              )   "configure"
808      Makefile.am             ) the automake input that was used to create
809                              )   Makefile.in
810      NEWS                    important changes in this release
811      NON-UNIX-USE            notes on building PCRE on non-Unix systems
812      PrepareRelease          script to make preparations for "make dist"
813      README                  this file
814      RunTest                 a Unix shell script for running tests
815      RunGrepTest             a Unix shell script for pcregrep tests
816      aclocal.m4              m4 macros (generated by "aclocal")
817      config.guess            ) files used by libtool,
818      config.sub              )   used only when building a shared library
819      configure               a configuring shell script (built by autoconf)
820      configure.ac            ) the autoconf input that was used to build
821                              )   "configure" and config.h
822      depcomp                 ) script to find program dependencies, generated by
823                              )   automake
824      doc/*.3                 man page sources for PCRE
825      doc/*.1                 man page sources for pcregrep and pcretest
826      doc/index.html.src      the base HTML page
827      doc/html/*              HTML documentation
828      doc/pcre.txt            plain text version of the man pages
829      doc/pcretest.txt        plain text documentation of test program
830      doc/perltest.txt        plain text documentation of Perl test program
831      install-sh              a shell script for installing files
832      libpcre16.pc.in         template for libpcre16.pc for pkg-config
833      libpcre.pc.in           template for libpcre.pc for pkg-config
834      libpcreposix.pc.in      template for libpcreposix.pc for pkg-config
835      libpcrecpp.pc.in        template for libpcrecpp.pc for pkg-config
836      ltmain.sh               file used to build a libtool script
837      missing                 ) common stub for a few missing GNU programs while
838                              )   installing, generated by automake
839      mkinstalldirs           script for making install directories
840      perltest.pl             Perl test program
841      pcre-config.in          source of script which retains PCRE information
842      pcre_jit_test.c         test program for the JIT compiler
843      pcrecpp_unittest.cc          )
844      pcre_scanner_unittest.cc     ) test programs for the C++ wrapper
845      pcre_stringpiece_unittest.cc )
846      testdata/testinput*     test data for main library tests
847      testdata/testoutput*    expected test results
848      testdata/grep*          input and output for pcregrep tests
849      testdata/*              other supporting test files
850    
851    (D) Auxiliary files for cmake support
852    
853      cmake/COPYING-CMAKE-SCRIPTS
854      cmake/FindPackageHandleStandardArgs.cmake
855      cmake/FindReadline.cmake
856      CMakeLists.txt
857      config-cmake.h.in
858    
859    (E) Auxiliary files for VPASCAL
860    
861      makevp.bat
862      makevp_c.txt
863      makevp_l.txt
864      pcregexp.pas
865    
866    (F) Auxiliary files for building PCRE "by hand"
867    
868      pcre.h.generic          ) a version of the public PCRE header file
869                              )   for use in non-"configure" environments
870      config.h.generic        ) a version of config.h for use in non-"configure"
871                              )   environments
872    
873    (F) Miscellaneous
874    
875      RunTest.bat            a script for running tests under Windows
876    
877    Philip Hazel
878    Email local part: ph10
879    Email domain: cam.ac.uk
880    Last updated: 30 December 2011

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