inline_invlist.c -> invlist_inline.h

1 files changed, 87 insertions, 0 deletions

diff --git a/invlist_inline.h b/invlist_inline.h
new file mode 100644
index 0000000000..4ce04f9087
--- /dev/null
+++ b/invlist_inline.h
@@ -0,0 +1,87 @@
+/*    invlist_inline.h
+ *
+ *    Copyright (C) 2012 by Larry Wall and others
+ *
+ *    You may distribute under the terms of either the GNU General Public
+ *    License or the Artistic License, as specified in the README file.
+ */
+
+#if defined(PERL_IN_UTF8_C) || defined(PERL_IN_REGCOMP_C) || defined(PERL_IN_REGEXEC_C)
+
+/* An element is in an inversion list iff its index is even numbered: 0, 2, 4,
+ * etc */
+#define ELEMENT_RANGE_MATCHES_INVLIST(i) (! ((i) & 1))
+#define PREV_RANGE_MATCHES_INVLIST(i) (! ELEMENT_RANGE_MATCHES_INVLIST(i))
+
+/* This converts to/from our UVs to what the SV code is expecting: bytes. */
+#define TO_INTERNAL_SIZE(x) ((x) * sizeof(UV))
+#define FROM_INTERNAL_SIZE(x) ((x)/ sizeof(UV))
+
+PERL_STATIC_INLINE bool*
+S_get_invlist_offset_addr(SV* invlist)
+{
+    /* Return the address of the field that says whether the inversion list is
+     * offset (it contains 1) or not (contains 0) */
+    PERL_ARGS_ASSERT_GET_INVLIST_OFFSET_ADDR;
+
+    assert(SvTYPE(invlist) == SVt_INVLIST);
+
+    return &(((XINVLIST*) SvANY(invlist))->is_offset);
+}
+
+PERL_STATIC_INLINE UV
+S__invlist_len(SV* const invlist)
+{
+    /* Returns the current number of elements stored in the inversion list's
+     * array */
+
+    PERL_ARGS_ASSERT__INVLIST_LEN;
+
+    assert(SvTYPE(invlist) == SVt_INVLIST);
+
+    return (SvCUR(invlist) == 0)
+           ? 0
+           : FROM_INTERNAL_SIZE(SvCUR(invlist)) - *get_invlist_offset_addr(invlist);
+}
+
+PERL_STATIC_INLINE bool
+S__invlist_contains_cp(SV* const invlist, const UV cp)
+{
+    /* Does <invlist> contain code point <cp> as part of the set? */
+
+    IV index = _invlist_search(invlist, cp);
+
+    PERL_ARGS_ASSERT__INVLIST_CONTAINS_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 */
+#       undef TO_INTERNAL_SIZE
+#       undef FROM_INTERNAL_SIZE
+#   endif
+
+#endif