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revision 211 by ph10, Thu Aug 9 09:52:43 2007 UTC revision 461 by ph10, Mon Oct 5 10:59:35 2009 UTC
# Line 77  Behave as if each regex has the /I Line 77  Behave as if each regex has the /I
77  compiled pattern is given after compilation.  compiled pattern is given after compilation.
78  </P>  </P>
79  <P>  <P>
80    <b>-M</b>
81    Behave as if each data line contains the \M escape sequence; this causes
82    PCRE to discover the minimum MATCH_LIMIT and MATCH_LIMIT_RECURSION settings by
83    calling <b>pcre_exec()</b> repeatedly with different limits.
84    </P>
85    <P>
86  <b>-m</b>  <b>-m</b>
87  Output the size of each compiled pattern after it has been compiled. This is  Output the size of each compiled pattern after it has been compiled. This is
88  equivalent to adding <b>/M</b> to each regular expression. For compatibility  equivalent to adding <b>/M</b> to each regular expression. For compatibility
# Line 130  stdout, and prompts for each line of inp Line 136  stdout, and prompts for each line of inp
136  expressions, and "data&#62;" to prompt for data lines.  expressions, and "data&#62;" to prompt for data lines.
137  </P>  </P>
138  <P>  <P>
139    When <b>pcretest</b> is built, a configuration option can specify that it should
140    be linked with the <b>libreadline</b> library. When this is done, if the input
141    is from a terminal, it is read using the <b>readline()</b> function. This
142    provides line-editing and history facilities. The output from the <b>-help</b>
143    option states whether or not <b>readline()</b> will be used.
144    </P>
145    <P>
146  The program handles any number of sets of input on a single input file. Each  The program handles any number of sets of input on a single input file. Each
147  set starts with a regular expression, and continues with any number of data  set starts with a regular expression, and continues with any number of data
148  lines to be matched against the pattern.  lines to be matched against the pattern.
# Line 191  effect as they do in Perl. For example: Line 204  effect as they do in Perl. For example:
204  The following table shows additional modifiers for setting PCRE options that do  The following table shows additional modifiers for setting PCRE options that do
205  not correspond to anything in Perl:  not correspond to anything in Perl:
206  <pre>  <pre>
207    <b>/A</b>          PCRE_ANCHORED    <b>/A</b>              PCRE_ANCHORED
208    <b>/C</b>          PCRE_AUTO_CALLOUT    <b>/C</b>              PCRE_AUTO_CALLOUT
209    <b>/E</b>          PCRE_DOLLAR_ENDONLY    <b>/E</b>              PCRE_DOLLAR_ENDONLY
210    <b>/f</b>          PCRE_FIRSTLINE    <b>/f</b>              PCRE_FIRSTLINE
211    <b>/J</b>          PCRE_DUPNAMES    <b>/J</b>              PCRE_DUPNAMES
212    <b>/N</b>          PCRE_NO_AUTO_CAPTURE    <b>/N</b>              PCRE_NO_AUTO_CAPTURE
213    <b>/U</b>          PCRE_UNGREEDY    <b>/U</b>              PCRE_UNGREEDY
214    <b>/X</b>          PCRE_EXTRA    <b>/X</b>              PCRE_EXTRA
215    <b>/&#60;cr&#62;</b>       PCRE_NEWLINE_CR    <b>/&#60;JS&#62;</b>           PCRE_JAVASCRIPT_COMPAT
216    <b>/&#60;lf&#62;</b>       PCRE_NEWLINE_LF    <b>/&#60;cr&#62;</b>           PCRE_NEWLINE_CR
217    <b>/&#60;crlf&#62;</b>     PCRE_NEWLINE_CRLF    <b>/&#60;lf&#62;</b>           PCRE_NEWLINE_LF
218    <b>/&#60;anycrlf&#62;</b>  PCRE_NEWLINE_ANYCRLF    <b>/&#60;crlf&#62;</b>         PCRE_NEWLINE_CRLF
219    <b>/&#60;any&#62;</b>      PCRE_NEWLINE_ANY    <b>/&#60;anycrlf&#62;</b>      PCRE_NEWLINE_ANYCRLF
220  </pre>    <b>/&#60;any&#62;</b>          PCRE_NEWLINE_ANY
221  Those specifying line ending sequencess are literal strings as shown. This    <b>/&#60;bsr_anycrlf&#62;</b>  PCRE_BSR_ANYCRLF
222  example sets multiline matching with CRLF as the line ending sequence:    <b>/&#60;bsr_unicode&#62;</b>  PCRE_BSR_UNICODE
223    </pre>
224    Those specifying line ending sequences are literal strings as shown, but the
225    letters can be in either case. This example sets multiline matching with CRLF
226    as the line ending sequence:
227  <pre>  <pre>
228    /^abc/m&#60;crlf&#62;    /^abc/m&#60;crlf&#62;
229  </pre>  </pre>
# Line 229  begins with a lookbehind assertion (incl Line 246  begins with a lookbehind assertion (incl
246  </P>  </P>
247  <P>  <P>
248  If any call to <b>pcre_exec()</b> in a <b>/g</b> or <b>/G</b> sequence matches an  If any call to <b>pcre_exec()</b> in a <b>/g</b> or <b>/G</b> sequence matches an
249  empty string, the next call is done with the PCRE_NOTEMPTY and PCRE_ANCHORED  empty string, the next call is done with the PCRE_NOTEMPTY_ATSTART and
250  flags set in order to search for another, non-empty, match at the same point.  PCRE_ANCHORED flags set in order to search for another, non-empty, match at the
251  If this second match fails, the start offset is advanced by one, and the normal  same point. If this second match fails, the start offset is advanced by one
252  match is retried. This imitates the way Perl handles such cases when using the  character, and the normal match is retried. This imitates the way Perl handles
253  <b>/g</b> modifier or the <b>split()</b> function.  such cases when using the <b>/g</b> modifier or the <b>split()</b> function.
254  </P>  </P>
255  <br><b>  <br><b>
256  Other modifiers  Other modifiers
# Line 353  recognized: Line 370  recognized:
370                 ated by next non-alphanumeric character)                 ated by next non-alphanumeric character)
371    \L         call pcre_get_substringlist() after a successful match    \L         call pcre_get_substringlist() after a successful match
372    \M         discover the minimum MATCH_LIMIT and MATCH_LIMIT_RECURSION settings    \M         discover the minimum MATCH_LIMIT and MATCH_LIMIT_RECURSION settings
373    \N         pass the PCRE_NOTEMPTY option to <b>pcre_exec()</b> or <b>pcre_dfa_exec()</b>    \N         pass the PCRE_NOTEMPTY option to <b>pcre_exec()</b> or <b>pcre_dfa_exec()</b>; if used twice, pass the
374                   PCRE_NOTEMPTY_ATSTART option
375    \Odd       set the size of the output vector passed to <b>pcre_exec()</b> to dd (any number of digits)    \Odd       set the size of the output vector passed to <b>pcre_exec()</b> to dd (any number of digits)
376    \P         pass the PCRE_PARTIAL option to <b>pcre_exec()</b> or <b>pcre_dfa_exec()</b>    \P         pass the PCRE_PARTIAL_SOFT option to <b>pcre_exec()</b> or <b>pcre_dfa_exec()</b>; if used twice, pass the
377                   PCRE_PARTIAL_HARD option
378    \Qdd       set the PCRE_MATCH_LIMIT_RECURSION limit to dd (any number of digits)    \Qdd       set the PCRE_MATCH_LIMIT_RECURSION limit to dd (any number of digits)
379    \R         pass the PCRE_DFA_RESTART option to <b>pcre_dfa_exec()</b>    \R         pass the PCRE_DFA_RESTART option to <b>pcre_dfa_exec()</b>
380    \S         output details of memory get/free calls during matching    \S         output details of memory get/free calls during matching
381      \Y         pass the PCRE_NO_START_OPTIMIZE option to <b>pcre_exec()</b> or <b>pcre_dfa_exec()</b>
382    \Z         pass the PCRE_NOTEOL option to <b>pcre_exec()</b> or <b>pcre_dfa_exec()</b>    \Z         pass the PCRE_NOTEOL option to <b>pcre_exec()</b> or <b>pcre_dfa_exec()</b>
383    \?         pass the PCRE_NO_UTF8_CHECK option to <b>pcre_exec()</b> or <b>pcre_dfa_exec()</b>    \?         pass the PCRE_NO_UTF8_CHECK option to <b>pcre_exec()</b> or <b>pcre_dfa_exec()</b>
384    \&#62;dd       start the match at offset dd (any number of digits);    \&#62;dd       start the match at offset dd (any number of digits);
# Line 436  This section describes the output when t Line 456  This section describes the output when t
456  <P>  <P>
457  When a match succeeds, pcretest outputs the list of captured substrings that  When a match succeeds, pcretest outputs the list of captured substrings that
458  <b>pcre_exec()</b> returns, starting with number 0 for the string that matched  <b>pcre_exec()</b> returns, starting with number 0 for the string that matched
459  the whole pattern. Otherwise, it outputs "No match" or "Partial match"  the whole pattern. Otherwise, it outputs "No match" when the return is
460  when <b>pcre_exec()</b> returns PCRE_ERROR_NOMATCH or PCRE_ERROR_PARTIAL,  PCRE_ERROR_NOMATCH, and "Partial match:" followed by the partially matching
461  respectively, and otherwise the PCRE negative error number. Here is an example  substring when <b>pcre_exec()</b> returns PCRE_ERROR_PARTIAL. For any other
462  of an interactive <b>pcretest</b> run.  returns, it outputs the PCRE negative error number. Here is an example of an
463    interactive <b>pcretest</b> run.
464  <pre>  <pre>
465    $ pcretest    $ pcretest
466    PCRE version 7.0 30-Nov-2006    PCRE version 7.0 30-Nov-2006
# Line 451  of an interactive pcretest run. Line 472  of an interactive pcretest run.
472    data&#62; xyz    data&#62; xyz
473    No match    No match
474  </pre>  </pre>
475    Note that unset capturing substrings that are not followed by one that is set
476    are not returned by <b>pcre_exec()</b>, and are not shown by <b>pcretest</b>. In
477    the following example, there are two capturing substrings, but when the first
478    data line is matched, the second, unset substring is not shown. An "internal"
479    unset substring is shown as "&#60;unset&#62;", as for the second data line.
480    <pre>
481        re&#62; /(a)|(b)/
482      data&#62; a
483       0: a
484       1: a
485      data&#62; b
486       0: b
487       1: &#60;unset&#62;
488       2: b
489    </pre>
490  If the strings contain any non-printing characters, they are output as \0x  If the strings contain any non-printing characters, they are output as \0x
491  escapes, or as \x{...} escapes if the <b>/8</b> modifier was present on the  escapes, or as \x{...} escapes if the <b>/8</b> modifier was present on the
492  pattern. See below for the definition of non-printing characters. If the  pattern. See below for the definition of non-printing characters. If the
# Line 504  the subject where there is at least one Line 540  the subject where there is at least one
540     2: tan     2: tan
541  </pre>  </pre>
542  (Using the normal matching function on this data finds only "tang".) The  (Using the normal matching function on this data finds only "tang".) The
543  longest matching string is always given first (and numbered zero).  longest matching string is always given first (and numbered zero). After a
544    PCRE_ERROR_PARTIAL return, the output is "Partial match:", followed by the
545    partially matching substring.
546  </P>  </P>
547  <P>  <P>
548  If <b>/g</b> is present on the pattern, the search for further matches resumes  If <b>/g</b> is present on the pattern, the search for further matches resumes
# Line 671  Cambridge CB2 3QH, England. Line 709  Cambridge CB2 3QH, England.
709  </P>  </P>
710  <br><a name="SEC15" href="#TOC1">REVISION</a><br>  <br><a name="SEC15" href="#TOC1">REVISION</a><br>
711  <P>  <P>
712  Last updated: 09 August 2007  Last updated: 26 September 2009
713  <br>  <br>
714  Copyright &copy; 1997-2007 University of Cambridge.  Copyright &copy; 1997-2009 University of Cambridge.
715  <br>  <br>
716  <p>  <p>
717  Return to the <a href="index.html">PCRE index page</a>.  Return to the <a href="index.html">PCRE index page</a>.

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