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revision 109 by ph10, Wed Mar 7 15:35:57 2007 UTC revision 145 by ph10, Wed Apr 4 14:06:52 2007 UTC
# Line 5  The latest release of PCRE is always ava Line 5  The latest release of PCRE is always ava
5    
6    ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-xxx.tar.gz    ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-xxx.tar.gz
7    
8    There is a mailing list for discussion about the development of PCRE at
9    
10      pcre-dev@exim.org
11    
12  Please read the NEWS file if you are upgrading from a previous release.  Please read the NEWS file if you are upgrading from a previous release.
13  The contents of this README file are:  The contents of this README file are:
14    
# Line 12  The contents of this README file are: Line 16  The contents of this README file are:
16    Documentation for PCRE    Documentation for PCRE
17    Contributions by users of PCRE    Contributions by users of PCRE
18    Building PCRE on non-Unix systems    Building PCRE on non-Unix systems
19    Building PCRE on a Unix-like system    Building PCRE on Unix-like systems
20    Retrieving configuration information on a Unix-like system    Retrieving configuration information on Unix-like systems
21    Shared libraries on Unix-like systems    Shared libraries on Unix-like systems
22    Cross-compiling on a Unix-like system    Cross-compiling on Unix-like systems
23    Using HP's ANSI C++ compiler (aCC)    Using HP's ANSI C++ compiler (aCC)
24      Making new tarballs
25    Testing PCRE    Testing PCRE
26    Character tables    Character tables
27    File manifest    File manifest
# Line 25  The contents of this README file are: Line 30  The contents of this README file are:
30  The PCRE APIs  The PCRE APIs
31  -------------  -------------
32    
33  PCRE is written in C, and it has its own API. The distribution now includes a  PCRE is written in C, and it has its own API. The distribution also includes a
34  set of C++ wrapper functions, courtesy of Google Inc. (see the pcrecpp man page  set of C++ wrapper functions (see the pcrecpp man page for details), courtesy
35  for details).  of Google Inc.
36    
37  Also included in the distribution are a set of C wrapper functions that are  In addition, there is a set of C wrapper functions that are based on the POSIX
38  based on the POSIX API. These end up in the library called libpcreposix. Note  regular expression API (see the pcreposix man page). These end up in the
39  that this just provides a POSIX calling interface to PCRE; the regular  library called libpcreposix. Note that this just provides a POSIX calling
40  expressions themselves still follow Perl syntax and semantics. The POSIX API is  interface to PCRE; the regular expressions themselves still follow Perl syntax
41  restricted, and does not give full access to all of PCRE's facilities.  and semantics. The POSIX API is restricted, and does not give full access to
42    all of PCRE's facilities.
43    
44  The header file for the POSIX-style functions is called pcreposix.h. The  The header file for the POSIX-style functions is called pcreposix.h. The
45  official POSIX name is regex.h, but I did not want to risk possible problems  official POSIX name is regex.h, but I did not want to risk possible problems
# Line 48  ensure that they link with PCRE's libpcr Line 54  ensure that they link with PCRE's libpcr
54  up the POSIX functions of the same name from the other library.  up the POSIX functions of the same name from the other library.
55    
56  One way of avoiding this confusion is to compile PCRE with the addition of  One way of avoiding this confusion is to compile PCRE with the addition of
57  -Dregcomp=PCREregcomp (and similarly for the other functions) to the compiler  -Dregcomp=PCREregcomp (and similarly for the other POSIX functions) to the
58  flags (CFLAGS if you are using "configure" -- see below). This has the effect  compiler flags (CFLAGS if you are using "configure" -- see below). This has the
59  of renaming the functions so that the names no longer clash. Of course, you  effect of renaming the functions so that the names no longer clash. Of course,
60  have to do the same thing for your applications, or write them using the new  you have to do the same thing for your applications, or write them using the
61  names.  new names.
62    
63    
64  Documentation for PCRE  Documentation for PCRE
65  ----------------------  ----------------------
66    
67  If you install PCRE in the normal way, you will end up with an installed set of  If you install PCRE in the normal way on a Unix-like system, you will end up
68  man pages whose names all start with "pcre". The one that is just called "pcre"  with a set of man pages whose names all start with "pcre". The one that is just
69  lists all the others. In addition to these man pages, the PCRE documentation is  called "pcre" lists all the others. In addition to these man pages, the PCRE
70  supplied in two other forms:  documentation is supplied in two other forms:
71    
72    1. There are files called doc/pcre.txt, doc/pcregrep.txt, and    1. There are files called doc/pcre.txt, doc/pcregrep.txt, and
73       doc/pcretest.txt in the source distribution. The first of these is a       doc/pcretest.txt in the source distribution. The first of these is a
# Line 69  supplied in two other forms: Line 75  supplied in two other forms:
75       those that summarize individual functions. The other two are the text       those that summarize individual functions. The other two are the text
76       forms of the section 1 man pages for the pcregrep and pcretest commands.       forms of the section 1 man pages for the pcregrep and pcretest commands.
77       These text forms are provided for ease of scanning with text editors or       These text forms are provided for ease of scanning with text editors or
78       similar tools.       similar tools. They are installed in <prefix>/share/doc/pcre, where
79         <prefix> is the installation prefix (defaulting to /usr/local).
80    
81    2. A set of files containing all the documentation in HTML form, hyperlinked    2. A set of files containing all the documentation in HTML form, hyperlinked
82       in various ways, and rooted in a file called index.html, is installed in       in various ways, and rooted in a file called index.html, is distributed in
83       the directory <prefix>/share/doc/pcre/html, where <prefix> is the       doc/html and installed in <prefix>/share/doc/pcre/html.
      installation prefix (defaulting to /usr/local).  
84    
85    
86  Contributions by users of PCRE  Contributions by users of PCRE
# Line 84  You can find contributions from PCRE use Line 90  You can find contributions from PCRE use
90    
91    ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/Contrib    ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/Contrib
92    
93  where there is also a README file giving brief descriptions of what they are.  There is a README file giving brief descriptions of what they are. Some are
94  Some are complete in themselves; others are pointers to URLs containing  complete in themselves; others are pointers to URLs containing relevant files.
95  relevant files. Some of this material is likely to be well out-of-date. In  Some of this material is likely to be well out-of-date. Several of the earlier
96  particular, several of the contributions provide support for compiling PCRE on  contributions provided support for compiling PCRE on various flavours of
97  various flavours of Windows (I myself do not use Windows), but it is hoped that  Windows (I myself do not use Windows). Nowadays there is more Windows support
98  more Windows support will find its way into the standard distribution.  in the standard distribution, so these contibutions have been archived.
99    
100    
101  Building PCRE on non-Unix systems  Building PCRE on non-Unix systems
102  ---------------------------------  ---------------------------------
103    
104  For a non-Unix system, read the comments in the file NON-UNIX-USE, though if  For a non-Unix system, please read the comments in the file NON-UNIX-USE,
105  the system supports the use of "configure" and "make" you may be able to build  though if your system supports the use of "configure" and "make" you may be
106  PCRE in the same way as for Unix-like systems.  able to build PCRE in the same way as for Unix-like systems.
107    
108  PCRE has been compiled on many different operating systems. It should be  PCRE has been compiled on many different operating systems. It should be
109  straightforward to build PCRE on any system that has a Standard C compiler and  straightforward to build PCRE on any system that has a Standard C compiler and
110  library, because it uses only Standard C functions.  library, because it uses only Standard C functions.
111    
112    
113  Building PCRE on a Unix-like system  Building PCRE on Unix-like systems
114  -----------------------------------  ----------------------------------
115    
116  If you are using HP's ANSI C++ compiler (aCC), please see the special note  If you are using HP's ANSI C++ compiler (aCC), please see the special note
117  in the section entitled "Using HP's ANSI C++ compiler (aCC)" below.  in the section entitled "Using HP's ANSI C++ compiler (aCC)" below.
118    
119    The following instructions assume the use of the widely used "configure, make,
120    make install" process. There is also some experimental support for "cmake" in
121    the PCRE distribution, but it is incomplete and not documented. However, if you
122    are a "cmake" user, you might want to try it.
123    
124  To build PCRE on a Unix-like system, first run the "configure" command from the  To build PCRE on a Unix-like system, first run the "configure" command from the
125  PCRE distribution directory, with your current directory set to the directory  PCRE distribution directory, with your current directory set to the directory
126  where you want the files to be created. This command is a standard GNU  where you want the files to be created. This command is a standard GNU
127  "autoconf" configuration script, for which generic instructions are supplied in  "autoconf" configuration script, for which generic instructions are supplied in
128  INSTALL.  the file INSTALL.
129    
130  Most commonly, people build PCRE within its own distribution directory, and in  Most commonly, people build PCRE within its own distribution directory, and in
131  this case, on many systems, just running "./configure" is sufficient. However,  this case, on many systems, just running "./configure" is sufficient. However,
# Line 142  library. You can read more about them in Line 153  library. You can read more about them in
153    
154  . If you want to suppress the building of the C++ wrapper library, you can add  . If you want to suppress the building of the C++ wrapper library, you can add
155    --disable-cpp to the "configure" command. Otherwise, when "configure" is run,    --disable-cpp to the "configure" command. Otherwise, when "configure" is run,
156    will try to find a C++ compiler and C++ header files, and if it succeeds, it    it will try to find a C++ compiler and C++ header files, and if it succeeds,
157    will try to build the C++ wrapper.    it will try to build the C++ wrapper.
158    
159  . If you want to make use of the support for UTF-8 character strings in PCRE,  . If you want to make use of the support for UTF-8 character strings in PCRE,
160    you must add --enable-utf8 to the "configure" command. Without it, the code    you must add --enable-utf8 to the "configure" command. Without it, the code
# Line 173  library. You can read more about them in Line 184  library. You can read more about them in
184    
185  . When called via the POSIX interface, PCRE uses malloc() to get additional  . When called via the POSIX interface, PCRE uses malloc() to get additional
186    storage for processing capturing parentheses if there are more than 10 of    storage for processing capturing parentheses if there are more than 10 of
187    them. You can increase this threshold by setting, for example,    them in a pattern. You can increase this threshold by setting, for example,
188    
189    --with-posix-malloc-threshold=20    --with-posix-malloc-threshold=20
190    
# Line 186  library. You can read more about them in Line 197  library. You can read more about them in
197    --with-match-limit=500000    --with-match-limit=500000
198    
199    on the "configure" command. This is just the default; individual calls to    on the "configure" command. This is just the default; individual calls to
200    pcre_exec() can supply their own value. There is discussion on the pcreapi    pcre_exec() can supply their own value. There is more discussion on the
201    man page.    pcreapi man page.
202    
203  . There is a separate counter that limits the depth of recursive function calls  . There is a separate counter that limits the depth of recursive function calls
204    during a matching process. This also has a default of ten million, which is    during a matching process. This also has a default of ten million, which is
# Line 202  library. You can read more about them in Line 213  library. You can read more about them in
213  . The default maximum compiled pattern size is around 64K. You can increase  . The default maximum compiled pattern size is around 64K. You can increase
214    this by adding --with-link-size=3 to the "configure" command. You can    this by adding --with-link-size=3 to the "configure" command. You can
215    increase it even more by setting --with-link-size=4, but this is unlikely    increase it even more by setting --with-link-size=4, but this is unlikely
216    ever to be necessary. If you build PCRE with an increased link size, test 2    ever to be necessary. Increasing the internal link size will reduce
217    (and 5 if you are using UTF-8) will fail. Part of the output of these tests    performance.
   is a representation of the compiled pattern, and this changes with the link  
   size.  
218    
219  . You can build PCRE so that its internal match() function that is called from  . You can build PCRE so that its internal match() function that is called from
220    pcre_exec() does not call itself recursively. Instead, it uses blocks of data    pcre_exec() does not call itself recursively. Instead, it uses memory blocks
221    from the heap via special functions pcre_stack_malloc() and pcre_stack_free()    obtained from the heap via the special functions pcre_stack_malloc() and
222    to save data that would otherwise be saved on the stack. To build PCRE like    pcre_stack_free() to save data that would otherwise be saved on the stack. To
223    this, use    build PCRE like this, use
224    
225    --disable-stack-for-recursion    --disable-stack-for-recursion
226    
227    on the "configure" command. PCRE runs more slowly in this mode, but it may be    on the "configure" command. PCRE runs more slowly in this mode, but it may be
228    necessary in environments with limited stack sizes. This applies only to the    necessary in environments with limited stack sizes. This applies only to the
229    pcre_exec() function; it does not apply to pcre_dfa_exec(), which does not    pcre_exec() function; it does not apply to pcre_dfa_exec(), which does not
230    use deeply nested recursion.    use deeply nested recursion. There is a discussion about stack sizes in the
231      pcrestack man page.
232    
233    . For speed, PCRE uses four tables for manipulating and identifying characters
234      whose code point values are less than 256. By default, it uses a set of
235      tables for ASCII encoding that is part of the distribution. If you specify
236    
237      --enable-rebuild-chartables
238    
239      a program called dftables is compiled and run in the default C locale when
240      you obey "make". It builds a source file called pcre_chartables.c. If you do
241      not specify this option, pcre_chartables.c is created as a copy of
242      pcre_chartables.c.dist. See "Character tables" below for further information.
243    
244    . It is possible to compile PCRE for use on systems that use EBCDIC as their
245      default character code (as opposed to ASCII) by specifying
246    
247      --enable-ebcdic
248    
249      This automatically implies --enable-rebuild-chartables (see above).
250    
251  The "configure" script builds the following files for the basic C library:  The "configure" script builds the following files for the basic C library:
252    
# Line 231  The "configure" script builds the follow Line 259  The "configure" script builds the follow
259  . RunTest is a script for running tests on the basic C library  . RunTest is a script for running tests on the basic C library
260  . RunGrepTest is a script for running tests on the pcregrep command  . RunGrepTest is a script for running tests on the pcregrep command
261    
262  Versions of config.h and pcre.h are distributed in the PCRE tarballs. These are  Versions of config.h and pcre.h are distributed in the PCRE tarballs under
263  provided for the benefit of those who have to compile PCRE without the benefit  the names config.h.generic and pcre.h.generic. These are provided for the
264  of "configure". If you use "configure", the distributed copies are replaced.  benefit of those who have to built PCRE without the benefit of "configure". If
265    you use "configure", the .generic versions are not used.
266    
267  If a C++ compiler is found, the following files are also built:  If a C++ compiler is found, the following files are also built:
268    
# Line 248  contains compiler output from tests that Line 277  contains compiler output from tests that
277  Once "configure" has run, you can run "make". It builds two libraries, called  Once "configure" has run, you can run "make". It builds two libraries, called
278  libpcre and libpcreposix, a test program called pcretest, a demonstration  libpcre and libpcreposix, a test program called pcretest, a demonstration
279  program called pcredemo, and the pcregrep command. If a C++ compiler was found  program called pcredemo, and the pcregrep command. If a C++ compiler was found
280  on your system, it also builds the C++ wrapper library, which is called  on your system, "make" also builds the C++ wrapper library, which is called
281  libpcrecpp, and some test programs called pcrecpp_unittest,  libpcrecpp, and some test programs called pcrecpp_unittest,
282  pcre_scanner_unittest, and pcre_stringpiece_unittest.  pcre_scanner_unittest, and pcre_stringpiece_unittest. Building the C++ wrapper
283    can be disabled by adding --disable-cpp to the "configure" command.
284    
285  The command "make check" runs all the appropriate tests. Details of the PCRE  The command "make check" runs all the appropriate tests. Details of the PCRE
286  tests are given below in a separate section of this document.  tests are given below in a separate section of this document.
# Line 262  system. The following are installed (fil Line 292  system. The following are installed (fil
292    Commands (bin):    Commands (bin):
293      pcretest      pcretest
294      pcregrep      pcregrep
295      pcre-config      pcre-config
296    
297    Libraries (lib):    Libraries (lib):
298      libpcre      libpcre
# Line 271  system. The following are installed (fil Line 301  system. The following are installed (fil
301    
302    Configuration information (lib/pkgconfig):    Configuration information (lib/pkgconfig):
303      libpcre.pc      libpcre.pc
304      libpcrecpp.ps (if C++ support is enabled)      libpcrecpp.pc (if C++ support is enabled)
305    
306    Header files (include):    Header files (include):
307      pcre.h      pcre.h
# Line 295  system. The following are installed (fil Line 325  system. The following are installed (fil
325      AUTHORS      AUTHORS
326      COPYING      COPYING
327      ChangeLog      ChangeLog
     INSTALL  
328      LICENCE      LICENCE
     NON-UNIX-USE  
329      NEWS      NEWS
330      README      README
331      pcre.txt       (a concatenation of the man(3) pages)      pcre.txt       (a concatenation of the man(3) pages)
332      pcretest.txt   the pcretest man page      pcretest.txt   the pcretest man page
333      pcregrep.txt   the pcregrep man page      pcregrep.txt   the pcregrep man page
     perltest.txt   some information about the perltest.pl script  
334    
335  Note that the pcredemo program that is built by "configure" is *not* installed  Note that the pcredemo program that is built by "configure" is *not* installed
336  anywhere. It is a demonstration for programmers wanting to use PCRE.  anywhere. It is a demonstration for programmers wanting to use PCRE.
337    
338  If you want to remove PCRE from your system, you can run "make uninstall".  If you want to remove PCRE from your system, you can run "make uninstall".
# Line 313  This removes all the files that "make in Line 340  This removes all the files that "make in
340  remove any directories, because these are often shared with other programs.  remove any directories, because these are often shared with other programs.
341    
342    
343  Retrieving configuration information on a Unix-like system  Retrieving configuration information on Unix-like systems
344  ----------------------------------------------------------  ---------------------------------------------------------
345    
346  Running "make install" installs the command pcre-config, which can be used to  Running "make install" installs the command pcre-config, which can be used to
347  recall information about the PCRE configuration and installation. For example:  recall information about the PCRE configuration and installation. For example:
# Line 353  built. The programs pcretest and pcregre Line 380  built. The programs pcretest and pcregre
380  libraries (by means of wrapper scripts in the case of shared libraries). When  libraries (by means of wrapper scripts in the case of shared libraries). When
381  you use "make install" to install shared libraries, pcregrep and pcretest are  you use "make install" to install shared libraries, pcregrep and pcretest are
382  automatically re-built to use the newly installed shared libraries before being  automatically re-built to use the newly installed shared libraries before being
383  installed themselves. However, the versions left in the source directory still  installed themselves. However, the versions left in the build directory still
384  use the uninstalled libraries.  use the uninstalled libraries.
385    
386  To build PCRE using static libraries only you must use --disable-shared when  To build PCRE using static libraries only you must use --disable-shared when
# Line 365  Then run "make" in the usual way. Simila Line 392  Then run "make" in the usual way. Simila
392  build only shared libraries.  build only shared libraries.
393    
394    
395  Cross-compiling on a Unix-like system  Cross-compiling on Unix-like systems
396  -------------------------------------  ------------------------------------
397    
398  You can specify CC and CFLAGS in the normal way to the "configure" command, in  You can specify CC and CFLAGS in the normal way to the "configure" command, in
399  order to cross-compile PCRE for some other host. However, during the building  order to cross-compile PCRE for some other host. However, you should NOT
400  process, the dftables.c source file is compiled *and run* on the local host, in  specify --enable-rebuild-chartables, because if you do, the dftables.c source
401  order to generate the default character tables (the chartables.c file). It  file is compiled and run on the local host, in order to generate the inbuilt
402  therefore needs to be compiled with the local compiler, not the cross compiler.  character tables (the pcre_chartables.c file). This will probably not work,
403  You can do this by specifying CC_FOR_BUILD (and if necessary CFLAGS_FOR_BUILD;  because dftables.c needs to be compiled with the local compiler, not the cross
404  there are also CXX_FOR_BUILD and CXXFLAGS_FOR_BUILD for the C++ wrapper)  compiler.
405  when calling the "configure" command. If they are not specified, they default  
406  to the values of CC and CFLAGS.  When --enable-rebuild-chartables is not specified, pcre_chartables.c is created
407    by making a copy of pcre_chartables.c.dist, which is a default set of tables
408    that assumes ASCII code. Cross-compiling with the default tables should not be
409    a problem.
410    
411    If you need to modify the character tables when cross-compiling, you should
412    move pcre_chartables.c.dist out of the way, then compile dftables.c by hand and
413    run it on the local host to make a new version of pcre_chartables.c.dist.
414    Then when you cross-compile PCRE this new version of the tables will be used.
415    
416    
417  Using HP's ANSI C++ compiler (aCC)  Using HP's ANSI C++ compiler (aCC)
418  ----------------------------------  ----------------------------------
419    
420  Unless C++ support is disabled by specifying the "--disable-cpp" option of the  Unless C++ support is disabled by specifying the "--disable-cpp" option of the
421  "configure" script, you *must* include the "-AA" option in the CXXFLAGS  "configure" script, you must include the "-AA" option in the CXXFLAGS
422  environment variable in order for the C++ components to compile correctly.  environment variable in order for the C++ components to compile correctly.
423    
424  Also, note that the aCC compiler on PA-RISC platforms may have a defect whereby  Also, note that the aCC compiler on PA-RISC platforms may have a defect whereby
# Line 395  running the "configure" script: Line 430  running the "configure" script:
430    CXXLDFLAGS="-lstd_v2 -lCsup_v2"    CXXLDFLAGS="-lstd_v2 -lCsup_v2"
431    
432    
433    Making new tarballs
434    -------------------
435    
436    The command "make dist" creates three PCRE tarballs, in tar.gz, tar.bz2, and
437    zip formats. However, if you have modified any of the man page sources in the
438    doc directory, you should first run the PrepareRelease script. This re-creates
439    the .txt and HTML forms of the documentation from the man pages.
440    
441    
442  Testing PCRE  Testing PCRE
443  ------------  ------------
444    
445  To test PCRE on a Unix system, run the RunTest script that is created by the  To test the basic PCRE library on a Unix system, run the RunTest script that is
446  configuring process. There is also a script called RunGrepTest that tests the  created by the configuring process. There is also a script called RunGrepTest
447  options of the pcregrep command. If the C++ wrapper library is build, three  that tests the options of the pcregrep command. If the C++ wrapper library is
448  test programs called pcrecpp_unittest, pcre_scanner_unittest, and  built, three test programs called pcrecpp_unittest, pcre_scanner_unittest, and
449  pcre_stringpiece_unittest are also built.  pcre_stringpiece_unittest are also built.
450    
451  Both the scripts and all the program tests are run if you obey "make check" or  Both the scripts and all the program tests are run if you obey "make check" or
452  "make test". For other systems, see the instructions in NON-UNIX-USE.  "make test". For other systems, see the instructions in NON-UNIX-USE.
453    
454  The RunTest script runs the pcretest test program (which is documented in its  The RunTest script runs the pcretest test program (which is documented in its
455  own man page) on each of the testinput files (in the testdata directory) in  own man page) on each of the testinput files in the testdata directory in
456  turn, and compares the output with the contents of the corresponding testoutput  turn, and compares the output with the contents of the corresponding testoutput
457  files. A file called testtry is used to hold the main output from pcretest  files. A file called testtry is used to hold the main output from pcretest
458  (testsavedregex is also used as a working file). To run pcretest on just one of  (testsavedregex is also used as a working file). To run pcretest on just one of
# Line 424  version. Line 468  version.
468  The second set of tests check pcre_fullinfo(), pcre_info(), pcre_study(),  The second set of tests check pcre_fullinfo(), pcre_info(), pcre_study(),
469  pcre_copy_substring(), pcre_get_substring(), pcre_get_substring_list(), error  pcre_copy_substring(), pcre_get_substring(), pcre_get_substring_list(), error
470  detection, and run-time flags that are specific to PCRE, as well as the POSIX  detection, and run-time flags that are specific to PCRE, as well as the POSIX
471  wrapper API. It also uses the debugging flag to check some of the internals of  wrapper API. It also uses the debugging flags to check some of the internals of
472  pcre_compile().  pcre_compile().
473    
474  If you build PCRE with a locale setting that is not the standard C locale, the  If you build PCRE with a locale setting that is not the standard C locale, the
# Line 450  is output to say why. If running this te Line 494  is output to say why. If running this te
494  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,
495  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.
496    
497    [If you are trying to run this test on Windows, you may be able to get it to
498    work by changing "fr_FR" to "french" everywhere it occurs.]
499    
500  The fourth test checks the UTF-8 support. It is not run automatically unless  The fourth test checks the UTF-8 support. It is not run automatically unless
501  PCRE is built with UTF-8 support. To do this you must set --enable-utf8 when  PCRE is built with UTF-8 support. To do this you must set --enable-utf8 when
502  running "configure". This file can be also fed directly to the perltest script,  running "configure". This file can be also fed directly to the perltest script,
# Line 459  commented in the script, can be be used. Line 506  commented in the script, can be be used.
506  The fifth test checks error handling with UTF-8 encoding, and internal UTF-8  The fifth test checks error handling with UTF-8 encoding, and internal UTF-8
507  features of PCRE that are not relevant to Perl.  features of PCRE that are not relevant to Perl.
508    
509  The sixth and test checks the support for Unicode character properties. It it  The sixth test checks the support for Unicode character properties. It it not
510  not run automatically unless PCRE is built with Unicode property support. To to  run automatically unless PCRE is built with Unicode property support. To to
511  this you must set --enable-unicode-properties when running "configure".  this you must set --enable-unicode-properties when running "configure".
512    
513  The seventh, eighth, and ninth tests check the pcre_dfa_exec() alternative  The seventh, eighth, and ninth tests check the pcre_dfa_exec() alternative
# Line 472  automatically unless PCRE is build with Line 519  automatically unless PCRE is build with
519  Character tables  Character tables
520  ----------------  ----------------
521    
522  PCRE uses four tables for manipulating and identifying characters whose values  For speed, PCRE uses four tables for manipulating and identifying characters
523  are less than 256. The final argument of the pcre_compile() function is a  whose code point values are less than 256. The final argument of the
524  pointer to a block of memory containing the concatenated tables. A call to  pcre_compile() function is a pointer to a block of memory containing the
525  pcre_maketables() can be used to generate a set of tables in the current  concatenated tables. A call to pcre_maketables() can be used to generate a set
526  locale. If the final argument for pcre_compile() is passed as NULL, a set of  of tables in the current locale. If the final argument for pcre_compile() is
527  default tables that is built into the binary is used.  passed as NULL, a set of default tables that is built into the binary is used.
528    
529  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
530  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
531  (compiled from dftables.c), which uses the ANSI C character handling functions  tables for ASCII coding. However, if --enable-rebuild-chartables is specified
532  such as isalnum(), isalpha(), isupper(), islower(), etc. to build the table  for ./configure, a different version of pcre_chartables.c is built by the
533  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
534  control the contents of these default tables. You can change the default tables  handling functions such as isalnum(), isalpha(), isupper(), islower(), etc. to
535  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
536  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
537  re-generated.  the default tables by editing pcre_chartables.c and then re-building PCRE. If
538    you do this, you should take care to ensure that the file does not get
539    automatically re-generated. The best way to do this is to move
540    pcre_chartables.c.dist out of the way and replace it with your customized
541    tables.
542    
543    When the dftables program is run as a result of --enable-rebuild-chartables,
544    it uses the default C locale that is set on your system. It does not pay
545    attention to the LC_xxx environment variables. In other words, it uses the
546    system's default locale rather than whatever the compiling user happens to have
547    set. If you really do want to build a source set of character tables in a
548    locale that is specified by the LC_xxx variables, you can run the dftables
549    program by hand with the -L option. For example:
550    
551      ./dftables -L pcre_chartables.c.special
552    
553  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,
554  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
555  digits, "word" characters, and white space, respectively. These are used when  digits, "word" characters, and white space, respectively. These are used when
556  building 32-byte bit maps that represent character classes for code points less  building 32-byte bit maps that represent character classes for code points less
557  than 256.  than 256.
558    
559  The final 256-byte table has bits indicating various character types, as  The final 256-byte table has bits indicating various character types, as
# Line 516  The distribution should contain the foll Line 577  The distribution should contain the foll
577    
578  (A) Source files of the PCRE library functions and their headers:  (A) Source files of the PCRE library functions and their headers:
579    
580    dftables.c             auxiliary program for building chartables.c    dftables.c              auxiliary program for building pcre_chartables.c
581                                when --enable-rebuild-chartables is specified
582    pcreposix.c            )  
583    pcre_compile.c         )    pcre_chartables.c.dist  a default set of character tables that assume ASCII
584    pcre_config.c          )                              coding; used, unless --enable-rebuild-chartables is
585    pcre_dfa_exec.c        )                              specified, by copying to pcre_chartables.c
586    pcre_exec.c            )  
587    pcre_fullinfo.c        )    pcreposix.c             )
588    pcre_get.c             ) sources for the functions in the library,    pcre_compile.c          )
589    pcre_globals.c         )   and some internal functions that they use    pcre_config.c           )
590    pcre_info.c            )    pcre_dfa_exec.c         )
591    pcre_maketables.c      )    pcre_exec.c             )
592    pcre_newline.c         )    pcre_fullinfo.c         )
593    pcre_ord2utf8.c        )    pcre_get.c              ) sources for the functions in the library,
594    pcre_refcount.c        )    pcre_globals.c          )   and some internal functions that they use
595    pcre_study.c           )    pcre_info.c             )
596    pcre_tables.c          )    pcre_maketables.c       )
597    pcre_try_flipped.c     )    pcre_newline.c          )
598    pcre_ucp_searchfuncs.c )    pcre_ord2utf8.c         )
599    pcre_valid_utf8.c      )    pcre_refcount.c         )
600    pcre_version.c         )    pcre_study.c            )
601    pcre_xclass.c          )    pcre_tables.c           )
602    pcre_printint.src      ) debugging function that is #included in pcretest,    pcre_try_flipped.c      )
603                           )   and can also be #included in pcre_compile()    pcre_ucp_searchfuncs.c  )
604    pcre.h                 ) a version of the public PCRE header file    pcre_valid_utf8.c       )
605                           )   for use in non-"configure" environments    pcre_version.c          )
606    pcre.h.in              template for pcre.h when built by "configure"    pcre_xclass.c           )
607    pcreposix.h            header for the external POSIX wrapper API    pcre_printint.src       ) debugging function that is #included in pcretest,
608    pcre_internal.h        header for internal use                            )   and can also be #included in pcre_compile()
609    ucp.h                  ) headers concerned with    pcre.h.in               template for pcre.h when built by "configure"
610    ucpinternal.h          )   Unicode property handling    pcreposix.h             header for the external POSIX wrapper API
611    ucptable.h             ) (this one is the data table)    pcre_internal.h         header for internal use
612      ucp.h                   ) headers concerned with
613    config.h               ) a version of config.h for use in non-"configure"    ucpinternal.h           )   Unicode property handling
614                           )   environments    ucptable.h              ) (this one is the data table)
615    config.h.in            template for config.h when built by "configure"  
616      config.h.in             template for config.h, which is built by "configure"
617    pcrecpp.h              public header file for the C++ wrapper  
618    pcrecpparg.h.in        template for another C++ header file    pcrecpp.h               public header file for the C++ wrapper
619    pcre_scanner.h         public header file for C++ scanner functions    pcrecpparg.h.in         template for another C++ header file
620    pcrecpp.cc             )    pcre_scanner.h          public header file for C++ scanner functions
621    pcre_scanner.cc        ) source for the C++ wrapper library    pcrecpp.cc              )
622      pcre_scanner.cc         ) source for the C++ wrapper library
623    pcre_stringpiece.h.in  template for pcre_stringpiece.h, the header for the  
624                             C++ stringpiece functions    pcre_stringpiece.h.in   template for pcre_stringpiece.h, the header for the
625    pcre_stringpiece.cc    source for the C++ stringpiece functions                              C++ stringpiece functions
626      pcre_stringpiece.cc     source for the C++ stringpiece functions
627    
628  (B) Source files for programs that use PCRE:  (B) Source files for programs that use PCRE:
629    
630    pcredemo.c             simple demonstration of coding calls to PCRE    pcredemo.c              simple demonstration of coding calls to PCRE
631    pcregrep.c             source of a grep utility that uses PCRE    pcregrep.c              source of a grep utility that uses PCRE
632    pcretest.c             comprehensive test program    pcretest.c              comprehensive test program
633    
634  (C) Auxiliary files:  (C) Auxiliary files:
635    
636    AUTHORS                information about the author of PCRE    132html                 script to turn "man" pages into HTML
637    ChangeLog              log of changes to the code    AUTHORS                 information about the author of PCRE
638    INSTALL                generic installation instructions    ChangeLog               log of changes to the code
639    LICENCE                conditions for the use of PCRE    CleanTxt                script to clean nroff output for txt man pages
640    COPYING                the same, using GNU's standard name    Detrail                 script to remove trailing spaces
641    Makefile.in            ) template for Unix Makefile, which is built by    HACKING                 some notes about the internals of PCRE
642                           )   "configure"    INSTALL                 generic installation instructions
643    Makefile.am            ) the automake input that was used to create    LICENCE                 conditions for the use of PCRE
644                           )   Makefile.in    COPYING                 the same, using GNU's standard name
645    NEWS                   important changes in this release    Makefile.in             ) template for Unix Makefile, which is built by
646    NON-UNIX-USE           notes on building PCRE on non-Unix systems                            )   "configure"
647    README                 this file    Makefile.am             ) the automake input that was used to create
648    RunTest.in             template for a Unix shell script for running tests                            )   Makefile.in
649    RunGrepTest.in         template for a Unix shell script for pcregrep tests    NEWS                    important changes in this release
650    aclocal.m4             m4 macros (generated by "aclocal")    NON-UNIX-USE            notes on building PCRE on non-Unix systems
651    config.guess           ) files used by libtool,    PrepareRelease          script to make preparations for "make dist"
652    config.sub             )   used only when building a shared library    README                  this file
653    configure              a configuring shell script (built by autoconf)    RunTest                 a Unix shell script for running tests
654    configure.ac           ) the autoconf input that was used to build    RunGrepTest             a Unix shell script for pcregrep tests
655                           )   "configure" and config.h    aclocal.m4              m4 macros (generated by "aclocal")
656    depcomp                ) script to find program dependencies, generated by    config.guess            ) files used by libtool,
657                           )   automake    config.sub              )   used only when building a shared library
658    doc/*.3                man page sources for the PCRE functions    configure               a configuring shell script (built by autoconf)
659    doc/*.1                man page sources for pcregrep and pcretest    configure.ac            ) the autoconf input that was used to build
660    doc/html/*             HTML documentation                            )   "configure" and config.h
661    doc/pcre.txt           plain text version of the man pages    depcomp                 ) script to find program dependencies, generated by
662    doc/pcretest.txt       plain text documentation of test program                            )   automake
663    doc/perltest.txt       plain text documentation of Perl test program    doc/*.3                 man page sources for the PCRE functions
664    install-sh             a shell script for installing files    doc/*.1                 man page sources for pcregrep and pcretest
665    libpcre.pc.in          template for libpcre.pc for pkg-config    doc/index.html.src      the base HTML page
666    libpcrecpp.pc.in       template for libpcrecpp.pc for pkg-config    doc/html/*              HTML documentation
667    ltmain.sh              file used to build a libtool script    doc/pcre.txt            plain text version of the man pages
668    missing                ) common stub for a few missing GNU programs while    doc/pcretest.txt        plain text documentation of test program
669                           )   installing, generated by automake    doc/perltest.txt        plain text documentation of Perl test program
670    mkinstalldirs          script for making install directories    install-sh              a shell script for installing files
671    perltest.pl            Perl test program    libpcre.pc.in           template for libpcre.pc for pkg-config
672    pcre-config.in         source of script which retains PCRE information    libpcrecpp.pc.in        template for libpcrecpp.pc for pkg-config
673    pcrecpp_unittest.c           )    ltmain.sh               file used to build a libtool script
674    pcre_scanner_unittest.c      ) test programs for the C++ wrapper    missing                 ) common stub for a few missing GNU programs while
675    pcre_stringpiece_unittest.c  )                            )   installing, generated by automake
676    testdata/testinput*    test data for main library tests    mkinstalldirs           script for making install directories
677    testdata/testoutput*   expected test results    perltest.pl             Perl test program
678    testdata/grep*         input and output for pcregrep tests    pcre-config.in          source of script which retains PCRE information
679      pcrecpp_unittest.cc          )
680      pcre_scanner_unittest.cc     ) test programs for the C++ wrapper
681      pcre_stringpiece_unittest.cc )
682      testdata/testinput*     test data for main library tests
683      testdata/testoutput*    expected test results
684      testdata/grep*          input and output for pcregrep tests
685    
686  (D) Auxiliary files for cmake support  (D) Auxiliary files for cmake support
687    
688    CMakeLists.txt    CMakeLists.txt
689    config-cmake.h.in    config-cmake.h.in
690    
691  (E) Auxiliary files for VPASCAL  (E) Auxiliary files for VPASCAL
692    
693    makevp.bat    makevp.bat
694    !compile.txt    makevp_c.txt
695    !linklib.txt    makevp_l.txt
696    pcregexp.pas    pcregexp.pas
697    
698    (F) Auxiliary files for building PCRE "by hand"
699    
700      pcre.h.generic          ) a version of the public PCRE header file
701                              )   for use in non-"configure" environments
702      config.h.generic        ) a version of config.h for use in non-"configure"
703                              )   environments
704    
705  (F) Miscellaneous  (F) Miscellaneous
706    
707    RunTest.bat            a script for running tests under Windows    RunTest.bat            a script for running tests under Windows
# Line 634  The distribution should contain the foll Line 709  The distribution should contain the foll
709  Philip Hazel  Philip Hazel
710  Email local part: ph10  Email local part: ph10
711  Email domain: cam.ac.uk  Email domain: cam.ac.uk
712  Last updated: March 2007  Last updated: 29 March 2007

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