/[pcre]/code/trunk/doc/pcretest.txt
ViewVC logotype

Diff of /code/trunk/doc/pcretest.txt

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

revision 91 by nigel, Sat Feb 24 21:41:34 2007 UTC revision 211 by ph10, Thu Aug 9 09:52:43 2007 UTC
# Line 19  SYNOPSIS Line 19  SYNOPSIS
19    
20  OPTIONS  OPTIONS
21    
22           -b        Behave as if each regex has the /B (show bytecode)  modifier;
23                     the internal form is output after compilation.
24    
25         -C        Output the version number of the PCRE library, and all avail-         -C        Output the version number of the PCRE library, and all avail-
26                   able   information  about  the  optional  features  that  are                   able  information  about  the  optional  features  that   are
27                   included, and then exit.                   included, and then exit.
28    
29         -d        Behave as if each regex has  the  /D  (debug)  modifier;  the         -d        Behave  as  if  each  regex  has the /D (debug) modifier; the
30                   internal form is output after compilation.                   internal form and information about the compiled  pattern  is
31                     output after compilation; -d is equivalent to -b -i.
32    
33         -dfa      Behave  as if each data line contains the \D escape sequence;         -dfa      Behave  as if each data line contains the \D escape sequence;
34                   this    causes    the    alternative    matching    function,                   this    causes    the    alternative    matching    function,
35                   pcre_dfa_exec(),   to   be   used  instead  of  the  standard                   pcre_dfa_exec(),   to   be   used  instead  of  the  standard
36                   pcre_exec() function (more detail is given below).                   pcre_exec() function (more detail is given below).
37    
38           -help     Output a brief summary these options and then exit.
39    
40         -i        Behave as if each regex  has  the  /I  modifier;  information         -i        Behave as if each regex  has  the  /I  modifier;  information
41                   about the compiled pattern is given after compilation.                   about the compiled pattern is given after compilation.
42    
# Line 40  OPTIONS Line 46  OPTIONS
46                   pcretest, -s is a synonym for -m.                   pcretest, -s is a synonym for -m.
47    
48         -o osize  Set the number of elements in the output vector that is  used         -o osize  Set the number of elements in the output vector that is  used
49                   when  calling  pcre_exec()  to be osize. The default value is                   when  calling pcre_exec() or pcre_dfa_exec() to be osize. The
50                   45, which is enough for 14 capturing subexpressions. The vec-                   default value is 45, which is enough for 14 capturing  subex-
51                   tor  size  can  be  changed  for individual matching calls by                   pressions   for  pcre_exec()  or  22  different  matches  for
52                   including \O in the data line (see below).                   pcre_dfa_exec(). The vector size can be changed for  individ-
53                     ual  matching  calls  by  including  \O in the data line (see
54                     below).
55    
56         -p        Behave as if each regex has the /P modifier; the POSIX  wrap-         -p        Behave as if each regex has the /P modifier; the POSIX  wrap-
57                   per  API  is used to call PCRE. None of the other options has                   per  API  is used to call PCRE. None of the other options has
# Line 59  OPTIONS Line 67  OPTIONS
67                   and  output resulting time per compile or match (in millisec-                   and  output resulting time per compile or match (in millisec-
68                   onds). Do not set -m with -t, because you will then  get  the                   onds). Do not set -m with -t, because you will then  get  the
69                   size  output  a  zillion  times,  and the timing will be dis-                   size  output  a  zillion  times,  and the timing will be dis-
70                   torted.                   torted. You can control the number  of  iterations  that  are
71                     used  for timing by following -t with a number (as a separate
72                     item on the command line). For example, "-t 1000" would iter-
73                     ate 1000 times. The default is to iterate 500000 times.
74    
75           -tm       This is like -t except that it times only the matching phase,
76                     not the compile or study phases.
77    
78    
79  DESCRIPTION  DESCRIPTION
# Line 77  DESCRIPTION Line 91  DESCRIPTION
91    
92         Each  data line is matched separately and independently. If you want to         Each  data line is matched separately and independently. If you want to
93         do multi-line matches, you have to use the \n escape sequence (or \r or         do multi-line matches, you have to use the \n escape sequence (or \r or
94         \r\n,  depending  on  the newline setting) in a single line of input to         \r\n, etc., depending on the newline setting) in a single line of input
95         encode the newline characters. There is no limit on the length of  data         to encode the newline sequences. There is no limit  on  the  length  of
96         lines; the input buffer is automatically extended if it is too small.         data  lines;  the  input  buffer is automatically extended if it is too
97           small.
98    
99         An  empty  line signals the end of the data lines, at which point a new         An empty line signals the end of the data lines, at which point  a  new
100         regular expression is read. The regular expressions are given  enclosed         regular  expression is read. The regular expressions are given enclosed
101         in any non-alphanumeric delimiters other than backslash, for example:         in any non-alphanumeric delimiters other than backslash, for example:
102    
103           /(a|bc)x+yz/           /(a|bc)x+yz/
104    
105         White  space before the initial delimiter is ignored. A regular expres-         White space before the initial delimiter is ignored. A regular  expres-
106         sion may be continued over several input lines, in which case the  new-         sion  may be continued over several input lines, in which case the new-
107         line  characters  are included within it. It is possible to include the         line characters are included within it. It is possible to  include  the
108         delimiter within the pattern by escaping it, for example         delimiter within the pattern by escaping it, for example
109    
110           /abc\/def/           /abc\/def/
111    
112         If you do so, the escape and the delimiter form part  of  the  pattern,         If  you  do  so, the escape and the delimiter form part of the pattern,
113         but  since delimiters are always non-alphanumeric, this does not affect         but since delimiters are always non-alphanumeric, this does not  affect
114         its interpretation.  If the terminating delimiter is  immediately  fol-         its  interpretation.   If the terminating delimiter is immediately fol-
115         lowed by a backslash, for example,         lowed by a backslash, for example,
116    
117           /abc/\           /abc/\
118    
119         then  a  backslash  is added to the end of the pattern. This is done to         then a backslash is added to the end of the pattern. This  is  done  to
120         provide a way of testing the error condition that arises if  a  pattern         provide  a  way of testing the error condition that arises if a pattern
121         finishes with a backslash, because         finishes with a backslash, because
122    
123           /abc\/           /abc\/
124    
125         is  interpreted as the first line of a pattern that starts with "abc/",         is interpreted as the first line of a pattern that starts with  "abc/",
126         causing pcretest to read the next line as a continuation of the regular         causing pcretest to read the next line as a continuation of the regular
127         expression.         expression.
128    
129    
130  PATTERN MODIFIERS  PATTERN MODIFIERS
131    
132         A  pattern may be followed by any number of modifiers, which are mostly         A pattern may be followed by any number of modifiers, which are  mostly
133         single characters. Following Perl usage, these are  referred  to  below         single  characters.  Following  Perl usage, these are referred to below
134         as,  for  example,  "the /i modifier", even though the delimiter of the         as, for example, "the /i modifier", even though the  delimiter  of  the
135         pattern need not always be a slash, and no slash is used  when  writing         pattern  need  not always be a slash, and no slash is used when writing
136         modifiers.  Whitespace  may  appear between the final pattern delimiter         modifiers. Whitespace may appear between the  final  pattern  delimiter
137         and the first modifier, and between the modifiers themselves.         and the first modifier, and between the modifiers themselves.
138    
139         The /i, /m, /s, and /x modifiers set the PCRE_CASELESS, PCRE_MULTILINE,         The /i, /m, /s, and /x modifiers set the PCRE_CASELESS, PCRE_MULTILINE,
140         PCRE_DOTALL,  or  PCRE_EXTENDED  options,  respectively, when pcre_com-         PCRE_DOTALL, or PCRE_EXTENDED  options,  respectively,  when  pcre_com-
141         pile() is called. These four modifier letters have the same  effect  as         pile()  is  called. These four modifier letters have the same effect as
142         they do in Perl. For example:         they do in Perl. For example:
143    
144           /caseless/i           /caseless/i
# Line 131  PATTERN MODIFIERS Line 146  PATTERN MODIFIERS
146         The following table shows additional modifiers for setting PCRE options         The following table shows additional modifiers for setting PCRE options
147         that do not correspond to anything in Perl:         that do not correspond to anything in Perl:
148    
149           /A       PCRE_ANCHORED           /A          PCRE_ANCHORED
150           /C       PCRE_AUTO_CALLOUT           /C          PCRE_AUTO_CALLOUT
151           /E       PCRE_DOLLAR_ENDONLY           /E          PCRE_DOLLAR_ENDONLY
152           /f       PCRE_FIRSTLINE           /f          PCRE_FIRSTLINE
153           /J       PCRE_DUPNAMES           /J          PCRE_DUPNAMES
154           /N       PCRE_NO_AUTO_CAPTURE           /N          PCRE_NO_AUTO_CAPTURE
155           /U       PCRE_UNGREEDY           /U          PCRE_UNGREEDY
156           /X       PCRE_EXTRA           /X          PCRE_EXTRA
157           /<cr>    PCRE_NEWLINE_CR           /<cr>       PCRE_NEWLINE_CR
158           /<lf>    PCRE_NEWLINE_LF           /<lf>       PCRE_NEWLINE_LF
159           /<crlf>  PCRE_NEWLINE_CRLF           /<crlf>     PCRE_NEWLINE_CRLF
160             /<anycrlf>  PCRE_NEWLINE_ANYCRLF
161         Those specifying line endings are literal strings as shown. Details  of           /<any>      PCRE_NEWLINE_ANY
162         the  meanings of these PCRE options are given in the pcreapi documenta-  
163         tion.         Those  specifying  line ending sequencess are literal strings as shown.
164           This example sets multiline matching  with  CRLF  as  the  line  ending
165           sequence:
166    
167             /^abc/m<crlf>
168    
169           Details  of the meanings of these PCRE options are given in the pcreapi
170           documentation.
171    
172     Finding all matches in a string     Finding all matches in a string
173    
# Line 175  PATTERN MODIFIERS Line 197  PATTERN MODIFIERS
197         remainder of the subject string. This is useful  for  tests  where  the         remainder of the subject string. This is useful  for  tests  where  the
198         subject contains multiple copies of the same substring.         subject contains multiple copies of the same substring.
199    
200         The  /L modifier must be followed directly by the name of a locale, for         The  /B modifier is a debugging feature. It requests that pcretest out-
201           put a representation of the compiled byte code after compilation.  Nor-
202           mally  this  information contains length and offset values; however, if
203           /Z is also present, this data is replaced by spaces. This is a  special
204           feature for use in the automatic test scripts; it ensures that the same
205           output is generated for different internal link sizes.
206    
207           The /L modifier must be followed directly by the name of a locale,  for
208         example,         example,
209    
210           /pattern/Lfr_FR           /pattern/Lfr_FR
211    
212         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,
213         pcre_maketables()  is called to build a set of character tables for the         pcre_maketables() is called to build a set of character tables for  the
214         locale, and this is then passed to pcre_compile()  when  compiling  the         locale,  and  this  is then passed to pcre_compile() when compiling the
215         regular  expression.  Without  an  /L  modifier,  NULL is passed as the         regular expression. Without an /L  modifier,  NULL  is  passed  as  the
216         tables pointer; that is, /L applies only to the expression on which  it         tables  pointer; that is, /L applies only to the expression on which it
217         appears.         appears.
218    
219         The  /I  modifier  requests  that pcretest output information about the         The /I modifier requests that pcretest  output  information  about  the
220         compiled pattern (whether it is anchored, has a fixed first  character,         compiled  pattern (whether it is anchored, has a fixed first character,
221         and  so  on). It does this by calling pcre_fullinfo() after compiling a         and so on). It does this by calling pcre_fullinfo() after  compiling  a
222         pattern. If the pattern is studied, the results of that are  also  out-         pattern.  If  the pattern is studied, the results of that are also out-
223         put.         put.
224    
225         The /D modifier is a PCRE debugging feature, which also assumes /I.  It         The /D modifier is a PCRE debugging feature, and is equivalent to  /BI,
226         causes the internal form of compiled regular expressions to  be  output         that is, both the /B and the /I modifiers.
        after compilation. If the pattern was studied, the information returned  
        is also output.  
227    
228         The /F modifier causes pcretest to flip the byte order of the fields in         The /F modifier causes pcretest to flip the byte order of the fields in
229         the  compiled  pattern  that  contain  2-byte  and 4-byte numbers. This         the compiled pattern that  contain  2-byte  and  4-byte  numbers.  This
230         facility is for testing the feature in PCRE that allows it  to  execute         facility  is  for testing the feature in PCRE that allows it to execute
231         patterns that were compiled on a host with a different endianness. This         patterns that were compiled on a host with a different endianness. This
232         feature is not available when the POSIX  interface  to  PCRE  is  being         feature  is  not  available  when  the POSIX interface to PCRE is being
233         used,  that is, when the /P pattern modifier is specified. See also the         used, that is, when the /P pattern modifier is specified. See also  the
234         section about saving and reloading compiled patterns below.         section about saving and reloading compiled patterns below.
235    
236         The /S modifier causes pcre_study() to be called after  the  expression         The  /S  modifier causes pcre_study() to be called after the expression
237         has been compiled, and the results used when the expression is matched.         has been compiled, and the results used when the expression is matched.
238    
239         The /M modifier causes the size of memory block used to hold  the  com-         The  /M  modifier causes the size of memory block used to hold the com-
240         piled pattern to be output.         piled pattern to be output.
241    
242         The  /P modifier causes pcretest to call PCRE via the POSIX wrapper API         The /P modifier causes pcretest to call PCRE via the POSIX wrapper  API
243         rather than its native API. When this  is  done,  all  other  modifiers         rather  than  its  native  API.  When this is done, all other modifiers
244         except  /i,  /m, and /+ are ignored. REG_ICASE is set if /i is present,         except /i, /m, and /+ are ignored. REG_ICASE is set if /i  is  present,
245         and REG_NEWLINE is set if /m is present. The  wrapper  functions  force         and  REG_NEWLINE  is  set if /m is present. The wrapper functions force
246         PCRE_DOLLAR_ENDONLY  always, and PCRE_DOTALL unless REG_NEWLINE is set.         PCRE_DOLLAR_ENDONLY always, and PCRE_DOTALL unless REG_NEWLINE is  set.
247    
248         The /8 modifier causes pcretest to call PCRE with the PCRE_UTF8  option         The  /8 modifier causes pcretest to call PCRE with the PCRE_UTF8 option
249         set.  This  turns on support for UTF-8 character handling in PCRE, pro-         set. This turns on support for UTF-8 character handling in  PCRE,  pro-
250         vided that it was compiled with this  support  enabled.  This  modifier         vided  that  it  was  compiled with this support enabled. This modifier
251         also causes any non-printing characters in output strings to be printed         also causes any non-printing characters in output strings to be printed
252         using the \x{hh...} notation if they are valid UTF-8 sequences.         using the \x{hh...} notation if they are valid UTF-8 sequences.
253    
254         If the /? modifier  is  used  with  /8,  it  causes  pcretest  to  call         If  the  /?  modifier  is  used  with  /8,  it  causes pcretest to call
255         pcre_compile()  with  the  PCRE_NO_UTF8_CHECK  option,  to suppress the         pcre_compile() with the  PCRE_NO_UTF8_CHECK  option,  to  suppress  the
256         checking of the string for UTF-8 validity.         checking of the string for UTF-8 validity.
257    
258    
259  DATA LINES  DATA LINES
260    
261         Before each data line is passed to pcre_exec(),  leading  and  trailing         Before  each  data  line is passed to pcre_exec(), leading and trailing
262         whitespace  is  removed,  and it is then scanned for \ escapes. Some of         whitespace is removed, and it is then scanned for \  escapes.  Some  of
263         these are pretty esoteric features, intended for checking out  some  of         these  are  pretty esoteric features, intended for checking out some of
264         the  more  complicated features of PCRE. If you are just testing "ordi-         the more complicated features of PCRE. If you are just  testing  "ordi-
265         nary" regular expressions, you probably don't need any  of  these.  The         nary"  regular  expressions,  you probably don't need any of these. The
266         following escapes are recognized:         following escapes are recognized:
267    
268           \a         alarm (= BEL)           \a         alarm (BEL, \x07)
269           \b         backspace           \b         backspace (\x08)
270           \e         escape           \e         escape (\x27)
271           \f         formfeed           \f         formfeed (\x0c)
272           \n         newline           \n         newline (\x0a)
273           \qdd       set the PCRE_MATCH_LIMIT limit to dd           \qdd       set the PCRE_MATCH_LIMIT limit to dd
274                        (any number of digits)                        (any number of digits)
275           \r         carriage return           \r         carriage return (\x0d)
276           \t         tab           \t         tab (\x09)
277           \v         vertical tab           \v         vertical tab (\x0b)
278           \nnn       octal character (up to 3 octal digits)           \nnn       octal character (up to 3 octal digits)
279           \xhh       hexadecimal character (up to 2 hex digits)           \xhh       hexadecimal character (up to 2 hex digits)
280           \x{hh...}  hexadecimal character, any number of digits           \x{hh...}  hexadecimal character, any number of digits
# Line 304  DATA LINES Line 331  DATA LINES
331                        or pcre_dfa_exec()                        or pcre_dfa_exec()
332           \<crlf>    pass the PCRE_NEWLINE_CRLF option to pcre_exec()           \<crlf>    pass the PCRE_NEWLINE_CRLF option to pcre_exec()
333                        or pcre_dfa_exec()                        or pcre_dfa_exec()
334             \<anycrlf> pass the PCRE_NEWLINE_ANYCRLF option to pcre_exec()
335                          or pcre_dfa_exec()
336             \<any>     pass the PCRE_NEWLINE_ANY option to pcre_exec()
337                          or pcre_dfa_exec()
338    
339         The  escapes  that specify line endings are literal strings, exactly as         The escapes that specify line ending  sequences  are  literal  strings,
340         shown.  A backslash followed by anything else just escapes the anything         exactly as shown. No more than one newline setting should be present in
341         else.  If  the  very last character is a backslash, it is ignored. This         any data line.
342         gives a way of passing an empty line as data, since a real  empty  line  
343         terminates the data input.         A backslash followed by anything else just escapes the  anything  else.
344           If  the very last character is a backslash, it is ignored. This gives a
345           way of passing an empty line as data, since a real  empty  line  termi-
346           nates the data input.
347    
348         If  \M  is present, pcretest calls pcre_exec() several times, with dif-         If  \M  is present, pcretest calls pcre_exec() several times, with dif-
349         ferent values in the match_limit and  match_limit_recursion  fields  of         ferent values in the match_limit and  match_limit_recursion  fields  of
# Line 335  DATA LINES Line 369  DATA LINES
369         The use of \x{hh...} to represent UTF-8 characters is not dependent  on         The use of \x{hh...} to represent UTF-8 characters is not dependent  on
370         the  use  of  the  /8 modifier on the pattern. It is recognized always.         the  use  of  the  /8 modifier on the pattern. It is recognized always.
371         There may be any number of hexadecimal digits inside  the  braces.  The         There may be any number of hexadecimal digits inside  the  braces.  The
372         result  is from one to six bytes, encoded according to the UTF-8 rules.         result  is  from  one  to  six bytes, encoded according to the original
373           UTF-8 rules of RFC 2279. This allows for  values  in  the  range  0  to
374           0x7FFFFFFF.  Note  that not all of those are valid Unicode code points,
375           or indeed valid UTF-8 characters according to the later  rules  in  RFC
376           3629.
377    
378    
379  THE ALTERNATIVE MATCHING FUNCTION  THE ALTERNATIVE MATCHING FUNCTION
380    
381         By  default,  pcretest  uses  the  standard  PCRE  matching   function,         By   default,  pcretest  uses  the  standard  PCRE  matching  function,
382         pcre_exec() to match each data line. From release 6.0, PCRE supports an         pcre_exec() to match each data line. From release 6.0, PCRE supports an
383         alternative matching function, pcre_dfa_test(),  which  operates  in  a         alternative  matching  function,  pcre_dfa_test(),  which operates in a
384         different  way,  and has some restrictions. The differences between the         different way, and has some restrictions. The differences  between  the
385         two functions are described in the pcrematching documentation.         two functions are described in the pcrematching documentation.
386    
387         If a data line contains the \D escape sequence, or if the command  line         If  a data line contains the \D escape sequence, or if the command line
388         contains  the -dfa option, the alternative matching function is called.         contains the -dfa option, the alternative matching function is  called.
389         This function finds all possible matches at a given point. If, however,         This function finds all possible matches at a given point. If, however,
390         the  \F escape sequence is present in the data line, it stops after the         the \F escape sequence is present in the data line, it stops after  the
391         first match is found. This is always the shortest possible match.         first match is found. This is always the shortest possible match.
392    
393    
394  DEFAULT OUTPUT FROM PCRETEST  DEFAULT OUTPUT FROM PCRETEST
395    
396         This section describes the output when the  normal  matching  function,         This  section  describes  the output when the normal matching function,
397         pcre_exec(), is being used.         pcre_exec(), is being used.
398    
399         When a match succeeds, pcretest outputs the list of captured substrings         When a match succeeds, pcretest outputs the list of captured substrings
400         that pcre_exec() returns, starting with number 0 for  the  string  that         that  pcre_exec()  returns,  starting with number 0 for the string that
401         matched the whole pattern. Otherwise, it outputs "No match" or "Partial         matched the whole pattern. Otherwise, it outputs "No match" or "Partial
402         match" when pcre_exec() returns PCRE_ERROR_NOMATCH  or  PCRE_ERROR_PAR-         match"  when  pcre_exec() returns PCRE_ERROR_NOMATCH or PCRE_ERROR_PAR-
403         TIAL,  respectively, and otherwise the PCRE negative error number. Here         TIAL, respectively, and otherwise the PCRE negative error number.  Here
404         is an example of an interactive pcretest run.         is an example of an interactive pcretest run.
405    
406           $ pcretest           $ pcretest
407           PCRE version 5.00 07-Sep-2004           PCRE version 7.0 30-Nov-2006
408    
409             re> /^abc(\d+)/             re> /^abc(\d+)/
410           data> abc123           data> abc123
# Line 375  DEFAULT OUTPUT FROM PCRETEST Line 413  DEFAULT OUTPUT FROM PCRETEST
413           data> xyz           data> xyz
414           No match           No match
415    
416         If the strings contain any non-printing characters, they are output  as         If  the strings contain any non-printing characters, they are output as
417         \0x  escapes,  or  as \x{...} escapes if the /8 modifier was present on         \0x escapes, or as \x{...} escapes if the /8 modifier  was  present  on
418         the pattern. If the pattern has the /+ modifier, the  output  for  sub-         the  pattern.  See below for the definition of non-printing characters.
419         string  0 is followed by the the rest of the subject string, identified         If the pattern has the /+ modifier, the output for substring 0 is  fol-
420         by "0+" like this:         lowed  by  the  the rest of the subject string, identified by "0+" like
421           this:
422    
423             re> /cat/+             re> /cat/+
424           data> cataract           data> cataract
# Line 407  DEFAULT OUTPUT FROM PCRETEST Line 446  DEFAULT OUTPUT FROM PCRETEST
446         (that  is,  the return from the extraction function) is given in paren-         (that  is,  the return from the extraction function) is given in paren-
447         theses after each string for \C and \G.         theses after each string for \C and \G.
448    
449         Note that while patterns can be continued over several lines  (a  plain         Note that whereas patterns can be continued over several lines (a plain
450         ">" prompt is used for continuations), data lines may not. However new-         ">" prompt is used for continuations), data lines may not. However new-
451         lines can be included in data by means of the \n escape (or \r or  \r\n         lines can be included in data by means of the \n escape (or  \r,  \r\n,
452         for those newline settings).         etc., depending on the newline sequence setting).
453    
454    
455  OUTPUT FROM THE ALTERNATIVE MATCHING FUNCTION  OUTPUT FROM THE ALTERNATIVE MATCHING FUNCTION
# Line 429  OUTPUT FROM THE ALTERNATIVE MATCHING FUN Line 468  OUTPUT FROM THE ALTERNATIVE MATCHING FUN
468         (Using the normal matching function on this data  finds  only  "tang".)         (Using the normal matching function on this data  finds  only  "tang".)
469         The  longest matching string is always given first (and numbered zero).         The  longest matching string is always given first (and numbered zero).
470    
471         If /gP is present on  the  pattern,  the  search  for  further  matches         If /g is present on the pattern, the search for further matches resumes
472         resumes at the end of the longest match. For example:         at the end of the longest match. For example:
473    
474             re> /(tang|tangerine|tan)/g             re> /(tang|tangerine|tan)/g
475           data> yellow tangerine and tangy sultana\D           data> yellow tangerine and tangy sultana\D
# Line 453  RESTARTING AFTER A PARTIAL MATCH Line 492  RESTARTING AFTER A PARTIAL MATCH
492         can  restart  the match with additional subject data by means of the \R         can  restart  the match with additional subject data by means of the \R
493         escape sequence. For example:         escape sequence. For example:
494    
495             re> /^?(jan|feb|mar|apr|may|jun|jul|aug|sep|oct|nov|dec)$/             re> /^\d?\d(jan|feb|mar|apr|may|jun|jul|aug|sep|oct|nov|dec)\d\d$/
496           data> 23ja\P\D           data> 23ja\P\D
497           Partial match: 23ja           Partial match: 23ja
498           data> n05\R\D           data> n05\R\D
# Line 503  CALLOUTS Line 542  CALLOUTS
542         the pcrecallout documentation.         the pcrecallout documentation.
543    
544    
545    NON-PRINTING CHARACTERS
546    
547           When pcretest is outputting text in the compiled version of a  pattern,
548           bytes  other  than 32-126 are always treated as non-printing characters
549           are are therefore shown as hex escapes.
550    
551           When pcretest is outputting text that is a matched part  of  a  subject
552           string,  it behaves in the same way, unless a different locale has been
553           set for the  pattern  (using  the  /L  modifier).  In  this  case,  the
554           isprint() function to distinguish printing and non-printing characters.
555    
556    
557  SAVING AND RELOADING COMPILED PATTERNS  SAVING AND RELOADING COMPILED PATTERNS
558    
559         The facilities described in this section are  not  available  when  the         The facilities described in this section are  not  available  when  the
# Line 559  SAVING AND RELOADING COMPILED PATTERNS Line 610  SAVING AND RELOADING COMPILED PATTERNS
610         a file that is not in the correct format, the result is undefined.         a file that is not in the correct format, the result is undefined.
611    
612    
613    SEE ALSO
614    
615           pcre(3),  pcreapi(3),  pcrecallout(3), pcrematching(3), pcrepartial(d),
616           pcrepattern(3), pcreprecompile(3).
617    
618    
619  AUTHOR  AUTHOR
620    
621         Philip Hazel         Philip Hazel
622         University Computing Service,         University Computing Service
623         Cambridge CB2 3QG, England.         Cambridge CB2 3QH, England.
624    
625    
626    REVISION
627    
628  Last updated: 29 June 2006         Last updated: 09 August 2007
629  Copyright (c) 1997-2006 University of Cambridge.         Copyright (c) 1997-2007 University of Cambridge.

Legend:
Removed from v.91  
changed lines
  Added in v.211

  ViewVC Help
Powered by ViewVC 1.1.5