Module-CoreList-5.20150220 is now on CPAN

[perl5.git] / inline_invlist.c

diff --git a/inline_invlist.c b/inline_invlist.c
index 1875a05..1589f95 100644 (file)
--- a/inline_invlist.c
+++ b/inline_invlist.c
@@ -56,6 +56,27 @@ S__invlist_contains_cp(SV* const invlist, const UV cp)
     return index >= 0 && ELEMENT_RANGE_MATCHES_INVLIST(index);
 }
 
+PERL_STATIC_INLINE UV*
+S_invlist_array(SV* const invlist)
+{
+    /* Returns the pointer to the inversion list's array.  Every time the
+     * length changes, this needs to be called in case malloc or realloc moved
+     * it */
+
+    PERL_ARGS_ASSERT_INVLIST_ARRAY;
+
+    /* Must not be empty.  If these fail, you probably didn't check for <len>
+     * being non-zero before trying to get the array */
+    assert(_invlist_len(invlist));
+
+    /* The very first element always contains zero, The array begins either
+     * there, or if the inversion list is offset, at the element after it.
+     * The offset header field determines which; it contains 0 or 1 to indicate
+     * how much additionally to add */
+    assert(0 == *(SvPVX(invlist)));
+    return ((UV *) SvPVX(invlist) + *get_invlist_offset_addr(invlist));
+}
+
 #   if defined(PERL_IN_UTF8_C) || defined(PERL_IN_REGEXEC_C)
 
 /* These symbols are only needed later in regcomp.c */