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revision 1403 by ph10, Wed Oct 31 17:42:29 2012 UTC revision 1404 by ph10, Tue Nov 19 15:36:57 2013 UTC
# Line 102  study data. Line 102  study data.
102  <br><a name="SEC3" href="#TOC1">RE-USING A PRECOMPILED PATTERN</a><br>  <br><a name="SEC3" href="#TOC1">RE-USING A PRECOMPILED PATTERN</a><br>
103  <P>  <P>
104  Re-using a precompiled pattern is straightforward. Having reloaded it into main  Re-using a precompiled pattern is straightforward. Having reloaded it into main
105  memory, called <b>pcre[16|32]_pattern_to_host_byte_order()</b> if necessary,  memory, called <b>pcre[16|32]_pattern_to_host_byte_order()</b> if necessary, you
106  you pass its pointer to <b>pcre[16|32]_exec()</b> or <b>pcre[16|32]_dfa_exec()</b> in  pass its pointer to <b>pcre[16|32]_exec()</b> or <b>pcre[16|32]_dfa_exec()</b> in
107  the usual way.  the usual way.
108  </P>  </P>
109  <P>  <P>
# Line 119  in the Line 119  in the
119  documentation.  documentation.
120  </P>  </P>
121  <P>  <P>
122    <b>Warning:</b> The tables that <b>pcre_exec()</b> and <b>pcre_dfa_exec()</b> use
123    must be the same as those that were used when the pattern was compiled. If this
124    is not the case, the behaviour is undefined.
125    </P>
126    <P>
127  If you did not provide custom character tables when the pattern was compiled,  If you did not provide custom character tables when the pattern was compiled,
128  the pointer in the compiled pattern is NULL, which causes the matching  the pointer in the compiled pattern is NULL, which causes the matching
129  functions to use PCRE's internal tables. Thus, you do not need to take any  functions to use PCRE's internal tables. Thus, you do not need to take any
# Line 126  special action at run time in this case. Line 131  special action at run time in this case.
131  </P>  </P>
132  <P>  <P>
133  If you saved study data with the compiled pattern, you need to create your own  If you saved study data with the compiled pattern, you need to create your own
134  <b>pcre[16|32]_extra</b> data block and set the <i>study_data</i> field to point to the  <b>pcre[16|32]_extra</b> data block and set the <i>study_data</i> field to point
135  reloaded study data. You must also set the PCRE_EXTRA_STUDY_DATA bit in the  to the reloaded study data. You must also set the PCRE_EXTRA_STUDY_DATA bit in
136  <i>flags</i> field to indicate that study data is present. Then pass the  the <i>flags</i> field to indicate that study data is present. Then pass the
137  <b>pcre[16|32]_extra</b> block to the matching function in the usual way. If the  <b>pcre[16|32]_extra</b> block to the matching function in the usual way. If the
138  pattern was studied for just-in-time optimization, that data cannot be saved,  pattern was studied for just-in-time optimization, that data cannot be saved,
139  and so is lost by a save/restore cycle.  and so is lost by a save/restore cycle.
# Line 149  Cambridge CB2 3QH, England. Line 154  Cambridge CB2 3QH, England.
154  </P>  </P>
155  <br><a name="SEC6" href="#TOC1">REVISION</a><br>  <br><a name="SEC6" href="#TOC1">REVISION</a><br>
156  <P>  <P>
157  Last updated: 24 June 2012  Last updated: 12 November 2013
158  <br>  <br>
159  Copyright &copy; 1997-2012 University of Cambridge.  Copyright &copy; 1997-2013 University of Cambridge.
160  <br>  <br>
161  <p>  <p>
162  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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