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8a287c0ea0
HEADSUP! With PCRE 8.39 the JIT related code was changed in the way, that additional valgrind options became almost unavoidable. Valgrind had it already sometimes hard with JIT, now there are seem to be more cases requiring special valgrind options. For this reason, the new configure option --with-pcre-valgrind was introduced. The option is development/debugging only and turns on the Valgrind related pieces in PCRE, so then false positives are avoided to the big part. In addition, run-tests.php was added a new valgrind option, when the leak check is enabled and the test filepath contains pcre. Thus, to debug the code related to PCRE with JIT enabled, two things would likely make sense - configure --with-pcre-valgrind - valgrind option --smc-check=all if run-tests.php is not used The checks so far reveal no new issues.
92 lines
3.7 KiB
C
92 lines
3.7 KiB
C
/*************************************************
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* Perl-Compatible Regular Expressions *
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*************************************************/
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/* PCRE is a library of functions to support regular expressions whose syntax
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and semantics are as close as possible to those of the Perl 5 language.
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Written by Philip Hazel
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Copyright (c) 1997-2012 University of Cambridge
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-----------------------------------------------------------------------------
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of the University of Cambridge nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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-----------------------------------------------------------------------------
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*/
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/* This module contains the external function pcre_refcount(), which is an
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auxiliary function that can be used to maintain a reference count in a compiled
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pattern data block. This might be helpful in applications where the block is
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shared by different users. */
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "pcre_internal.h"
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/*************************************************
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* Maintain reference count *
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*************************************************/
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/* The reference count is a 16-bit field, initialized to zero. It is not
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possible to transfer a non-zero count from one host to a different host that
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has a different byte order - though I can't see why anyone in their right mind
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would ever want to do that!
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Arguments:
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argument_re points to compiled code
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adjust value to add to the count
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Returns: the (possibly updated) count value (a non-negative number), or
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a negative error number
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*/
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#if defined COMPILE_PCRE8
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PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
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pcre_refcount(pcre *argument_re, int adjust)
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#elif defined COMPILE_PCRE16
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PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
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pcre16_refcount(pcre16 *argument_re, int adjust)
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#elif defined COMPILE_PCRE32
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PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
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pcre32_refcount(pcre32 *argument_re, int adjust)
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#endif
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{
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REAL_PCRE *re = (REAL_PCRE *)argument_re;
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if (re == NULL) return PCRE_ERROR_NULL;
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if (re->magic_number != MAGIC_NUMBER) return PCRE_ERROR_BADMAGIC;
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if ((re->flags & PCRE_MODE) == 0) return PCRE_ERROR_BADMODE;
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re->ref_count = (-adjust > re->ref_count)? 0 :
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(adjust + re->ref_count > 65535)? 65535 :
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re->ref_count + adjust;
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return re->ref_count;
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}
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/* End of pcre_refcount.c */
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