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| 1 | /************************************************* | - |
| 2 | * Perl-Compatible Regular Expressions * | - |
| 3 | *************************************************/ | - |
| 4 | | - |
| 5 | /* PCRE is a library of functions to support regular expressions whose syntax | - |
| 6 | and semantics are as close as possible to those of the Perl 5 language. | - |
| 7 | | - |
| 8 | Written by Philip Hazel | - |
| 9 | Copyright (c) 1997-2012 University of Cambridge | - |
| 10 | | - |
| 11 | ----------------------------------------------------------------------------- | - |
| 12 | Redistribution and use in source and binary forms, with or without | - |
| 13 | modification, are permitted provided that the following conditions are met: | - |
| 14 | | - |
| 15 | * Redistributions of source code must retain the above copyright notice, | - |
| 16 | this list of conditions and the following disclaimer. | - |
| 17 | | - |
| 18 | * Redistributions in binary form must reproduce the above copyright | - |
| 19 | notice, this list of conditions and the following disclaimer in the | - |
| 20 | documentation and/or other materials provided with the distribution. | - |
| 21 | | - |
| 22 | * Neither the name of the University of Cambridge nor the names of its | - |
| 23 | contributors may be used to endorse or promote products derived from | - |
| 24 | this software without specific prior written permission. | - |
| 25 | | - |
| 26 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | - |
| 27 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | - |
| 28 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | - |
| 29 | ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | - |
| 30 | LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | - |
| 31 | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | - |
| 32 | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | - |
| 33 | INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | - |
| 34 | CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | - |
| 35 | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | - |
| 36 | POSSIBILITY OF SUCH DAMAGE. | - |
| 37 | ----------------------------------------------------------------------------- | - |
| 38 | */ | - |
| 39 | | - |
| 40 | | - |
| 41 | /* This module contains the external function pcre_refcount(), which is an | - |
| 42 | auxiliary function that can be used to maintain a reference count in a compiled | - |
| 43 | pattern data block. This might be helpful in applications where the block is | - |
| 44 | shared by different users. */ | - |
| 45 | | - |
| 46 | | - |
| 47 | #ifdef PCRE_HAVE_CONFIG_H | - |
| 48 | #include "config.h" | - |
| 49 | #endif | - |
| 50 | | - |
| 51 | #include "pcre_internal.h" | - |
| 52 | | - |
| 53 | | - |
| 54 | /************************************************* | - |
| 55 | * Maintain reference count * | - |
| 56 | *************************************************/ | - |
| 57 | | - |
| 58 | /* The reference count is a 16-bit field, initialized to zero. It is not | - |
| 59 | possible to transfer a non-zero count from one host to a different host that | - |
| 60 | has a different byte order - though I can't see why anyone in their right mind | - |
| 61 | would ever want to do that! | - |
| 62 | | - |
| 63 | Arguments: | - |
| 64 | argument_re points to compiled code | - |
| 65 | adjust value to add to the count | - |
| 66 | | - |
| 67 | Returns: the (possibly updated) count value (a non-negative number), or | - |
| 68 | a negative error number | - |
| 69 | */ | - |
| 70 | | - |
| 71 | #ifdef COMPILE_PCRE8 | - |
| 72 | PCRE_EXP_DEFN int PCRE_CALL_CONVENTION | - |
| 73 | pcre_refcount(pcre *argument_re, int adjust) | - |
| 74 | #else | - |
| 75 | PCRE_EXP_DEFN int PCRE_CALL_CONVENTION | - |
| 76 | pcre16_refcount(pcre16 *argument_re, int adjust) | - |
| 77 | #endif | - |
| 78 | { | - |
| 79 | REAL_PCRE *re = (REAL_PCRE *)argument_re; never executed (the execution status of this line is deduced): real_pcre16 *re = (real_pcre16 *)argument_re; | - |
| 80 | if (re == NULL) return PCRE_ERROR_NULL; never executed: return (-2); never evaluated: re == ((void *)0) | 0 |
| 81 | if (re->magic_number != MAGIC_NUMBER) return PCRE_ERROR_BADMAGIC; never executed: return (-4); never evaluated: re->magic_number != 0x50435245UL | 0 |
| 82 | if ((re->flags & PCRE_MODE) == 0) return PCRE_ERROR_BADMODE; never executed: return (-28); never evaluated: (re->flags & 0x0002) == 0 | 0 |
| 83 | re->ref_count = (-adjust > re->ref_count)? 0 : never evaluated: (-adjust > re->ref_count) | 0 |
| 84 | (adjust + re->ref_count > 65535)? 65535 : never executed (the execution status of this line is deduced): (adjust + re->ref_count > 65535)? 65535 : | - |
| 85 | re->ref_count + adjust; never executed (the execution status of this line is deduced): re->ref_count + adjust; | - |
| 86 | return re->ref_count; never executed: return re->ref_count; | 0 |
| 87 | } | - |
| 88 | | - |
| 89 | /* End of pcre_refcount.c */ | - |
| 90 | | - |
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