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-rw-r--r--pcre_refcount.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/pcre_refcount.c b/pcre_refcount.c
index 92e4b85..fdda9e4 100644
--- a/pcre_refcount.c
+++ b/pcre_refcount.c
@@ -6,7 +6,7 @@
and semantics are as close as possible to those of the Perl 5 language.
Written by Philip Hazel
- Copyright (c) 1997-2008 University of Cambridge
+ Copyright (c) 1997-2012 University of Cambridge
-----------------------------------------------------------------------------
Redistribution and use in source and binary forms, with or without
@@ -68,11 +68,18 @@ Returns: the (possibly updated) count value (a non-negative number), or
a negative error number
*/
+#ifdef COMPILE_PCRE8
PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
pcre_refcount(pcre *argument_re, int adjust)
+#else
+PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
+pcre_refcount(pcre *argument_re, int adjust)
+#endif
{
real_pcre *re = (real_pcre *)argument_re;
if (re == NULL) return PCRE_ERROR_NULL;
+if (re->magic_number != MAGIC_NUMBER) return PCRE_ERROR_BADMAGIC;
+if ((re->flags & PCRE_MODE) == 0) return PCRE_ERROR_BADMODE;
re->ref_count = (-adjust > re->ref_count)? 0 :
(adjust + re->ref_count > 65535)? 65535 :
re->ref_count + adjust;