/[pcre]/code/trunk/doc/pcreprecompile.3
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revision 77 by nigel, Sat Feb 24 21:40:45 2007 UTC revision 182 by ph10, Wed Jun 13 15:09:54 2007 UTC
# Line 1  Line 1 
1  .TH PCRE 3  .TH PCREPRECOMPILE 3
2  .SH NAME  .SH NAME
3  PCRE - Perl-compatible regular expressions  PCRE - Perl-compatible regular expressions
4  .SH "SAVING AND RE-USING PRECOMPILED PCRE PATTERNS"  .SH "SAVING AND RE-USING PRECOMPILED PCRE PATTERNS"
# Line 17  tables, it is a little bit more complica Line 17  tables, it is a little bit more complica
17  If you save compiled patterns to a file, you can copy them to a different host  If you save compiled patterns to a file, you can copy them to a different host
18  and run them there. This works even if the new host has the opposite endianness  and run them there. This works even if the new host has the opposite endianness
19  to the one on which the patterns were compiled. There may be a small  to the one on which the patterns were compiled. There may be a small
20  performance penalty, but it should be insignificant.  performance penalty, but it should be insignificant. However, compiling regular
21    expressions with one version of PCRE for use with a different version is not
22    guaranteed to work and may cause crashes.
23  .  .
24  .  .
25  .SH "SAVING A COMPILED PATTERN"  .SH "SAVING A COMPILED PATTERN"
# Line 115  usual way. Line 117  usual way.
117  .SH "COMPATIBILITY WITH DIFFERENT PCRE RELEASES"  .SH "COMPATIBILITY WITH DIFFERENT PCRE RELEASES"
118  .rs  .rs
119  .sp  .sp
120  The layout of the control block that is at the start of the data that makes up  In general, it is safest to recompile all saved patterns when you update to a
121  a compiled pattern was changed for release 5.0. If you have any saved patterns  new PCRE release, though not all updates actually require this. Recompiling is
122  that were compiled with previous releases (not a facility that was previously  definitely needed for release 7.2.
123  advertised), you will have to recompile them for release 5.0. However, from now  .
124  on, it should be possible to make changes in a compabible manner.  .
125  .P  .
126  .in 0  .SH AUTHOR
127  Last updated: 28 February 2005  .rs
128  .br  .sp
129  Copyright (c) 1997-2005 University of Cambridge.  .nf
130    Philip Hazel
131    University Computing Service
132    Cambridge CB2 3QH, England.
133    .fi
134    .
135    .
136    .SH REVISION
137    .rs
138    .sp
139    .nf
140    Last updated: 13 June 2007
141    Copyright (c) 1997-2007 University of Cambridge.
142    .fi
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