/[pcre]/code/trunk/doc/pcretest.1
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revision 535 by ph10, Thu Jun 3 19:18:24 2010 UTC revision 567 by ph10, Sat Nov 6 17:10:00 2010 UTC
# Line 219  begins with a lookbehind assertion (incl Line 219  begins with a lookbehind assertion (incl
219  If any call to \fBpcre_exec()\fP in a \fB/g\fP or \fB/G\fP sequence matches an  If any call to \fBpcre_exec()\fP in a \fB/g\fP or \fB/G\fP sequence matches an
220  empty string, the next call is done with the PCRE_NOTEMPTY_ATSTART and  empty string, the next call is done with the PCRE_NOTEMPTY_ATSTART and
221  PCRE_ANCHORED flags set in order to search for another, non-empty, match at the  PCRE_ANCHORED flags set in order to search for another, non-empty, match at the
222  same point. If this second match fails, the start offset is advanced by one  same point. If this second match fails, the start offset is advanced, and the
223  character, and the normal match is retried. This imitates the way Perl handles  normal match is retried. This imitates the way Perl handles such cases when
224  such cases when using the \fB/g\fP modifier or the \fBsplit()\fP function.  using the \fB/g\fP modifier or the \fBsplit()\fP function. Normally, the start
225    offset is advanced by one character, but if the newline convention recognizes
226    CRLF as a newline, and the current character is CR followed by LF, an advance
227    of two is used.
228  .  .
229  .  .
230  .SS "Other modifiers"  .SS "Other modifiers"
# Line 276  example, Line 279  example,
279  For this reason, it must be the last modifier. The given locale is set,  For this reason, it must be the last modifier. The given locale is set,
280  \fBpcre_maketables()\fP is called to build a set of character tables for the  \fBpcre_maketables()\fP is called to build a set of character tables for the
281  locale, and this is then passed to \fBpcre_compile()\fP when compiling the  locale, and this is then passed to \fBpcre_compile()\fP when compiling the
282  regular expression. Without an \fB/L\fP modifier, NULL is passed as the tables  regular expression. Without an \fB/L\fP (or \fB/T\fP) modifier, NULL is passed
283  pointer; that is, \fB/L\fP applies only to the expression on which it appears.  as the tables pointer; that is, \fB/L\fP applies only to the expression on
284    which it appears.
285  .P  .P
286  The \fB/M\fP modifier causes the size of memory block used to hold the compiled  The \fB/M\fP modifier causes the size of memory block used to hold the compiled
287  pattern to be output.  pattern to be output.
# Line 285  pattern to be output. Line 289  pattern to be output.
289  The \fB/S\fP modifier causes \fBpcre_study()\fP to be called after the  The \fB/S\fP modifier causes \fBpcre_study()\fP to be called after the
290  expression has been compiled, and the results used when the expression is  expression has been compiled, and the results used when the expression is
291  matched.  matched.
292    .P
293    The \fB/T\fP modifier must be followed by a single digit. It causes a specific
294    set of built-in character tables to be passed to \fBpcre_compile()\fP. It is
295    used in the standard PCRE tests to check behaviour with different character
296    tables. The digit specifies the tables as follows:
297    .sp
298      0   the default ASCII tables, as distributed in
299            pcre_chartables.c.dist
300      1   a set of tables defining ISO 8859 characters
301    .sp
302    In table 1, some characters whose codes are greater than 128 are identified as
303    letters, digits, spaces, etc.
304  .  .
305  .  .
306  .SS "Using the POSIX wrapper API"  .SS "Using the POSIX wrapper API"
# Line 398  recognized: Line 414  recognized:
414  .\" JOIN  .\" JOIN
415    \e?         pass the PCRE_NO_UTF8_CHECK option to    \e?         pass the PCRE_NO_UTF8_CHECK option to
416                 \fBpcre_exec()\fP or \fBpcre_dfa_exec()\fP                 \fBpcre_exec()\fP or \fBpcre_dfa_exec()\fP
   \e>dd       start the match at offset dd (any number of digits);  
417  .\" JOIN  .\" JOIN
418                 this sets the \fIstartoffset\fP argument for \fBpcre_exec()\fP    \e>dd       start the match at offset dd (optional "-"; then
419                 or \fBpcre_dfa_exec()\fP                 any number of digits); this sets the \fIstartoffset\fP
420                   argument for \fBpcre_exec()\fP or \fBpcre_dfa_exec()\fP
421  .\" JOIN  .\" JOIN
422    \e<cr>      pass the PCRE_NEWLINE_CR option to \fBpcre_exec()\fP    \e<cr>      pass the PCRE_NEWLINE_CR option to \fBpcre_exec()\fP
423                 or \fBpcre_dfa_exec()\fP                 or \fBpcre_dfa_exec()\fP
# Line 486  When a match succeeds, pcretest outputs Line 502  When a match succeeds, pcretest outputs
502  \fBpcre_exec()\fP returns, starting with number 0 for the string that matched  \fBpcre_exec()\fP returns, starting with number 0 for the string that matched
503  the whole pattern. Otherwise, it outputs "No match" when the return is  the whole pattern. Otherwise, it outputs "No match" when the return is
504  PCRE_ERROR_NOMATCH, and "Partial match:" followed by the partially matching  PCRE_ERROR_NOMATCH, and "Partial match:" followed by the partially matching
505  substring when \fBpcre_exec()\fP returns PCRE_ERROR_PARTIAL. For any other  substring when \fBpcre_exec()\fP returns PCRE_ERROR_PARTIAL. (Note that this is
506  returns, it outputs the PCRE negative error number. Here is an example of an  the entire substring that was inspected during the partial match; it may
507  interactive \fBpcretest\fP run.  include characters before the actual match start if a lookbehind assertion,
508    \eK, \eb, or \eB was involved.) For any other returns, it outputs the PCRE
509    negative error number. Here is an example of an interactive \fBpcretest\fP run.
510  .sp  .sp
511    $ pcretest    $ pcretest
512    PCRE version 7.0 30-Nov-2006    PCRE version 7.0 30-Nov-2006
# Line 571  the subject where there is at least one Line 589  the subject where there is at least one
589  (Using the normal matching function on this data finds only "tang".) The  (Using the normal matching function on this data finds only "tang".) The
590  longest matching string is always given first (and numbered zero). After a  longest matching string is always given first (and numbered zero). After a
591  PCRE_ERROR_PARTIAL return, the output is "Partial match:", followed by the  PCRE_ERROR_PARTIAL return, the output is "Partial match:", followed by the
592  partially matching substring.  partially matching substring. (Note that this is the entire substring that was
593    inspected during the partial match; it may include characters before the actual
594    match start if a lookbehind assertion, \eK, \eb, or \eB was involved.)
595  .P  .P
596  If \fB/g\fP is present on the pattern, the search for further matches resumes  If \fB/g\fP is present on the pattern, the search for further matches resumes
597  at the end of the longest match. For example:  at the end of the longest match. For example:
# Line 750  Cambridge CB2 3QH, England. Line 770  Cambridge CB2 3QH, England.
770  .rs  .rs
771  .sp  .sp
772  .nf  .nf
773  Last updated: 16 May 2010  Last updated: 06 November 2010
774  Copyright (c) 1997-2010 University of Cambridge.  Copyright (c) 1997-2010 University of Cambridge.
775  .fi  .fi

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