3 * Copyright (C) 2012 by Larry Wall and others
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
9 #if defined(PERL_IN_UTF8_C) || defined(PERL_IN_REGCOMP_C) || defined(PERL_IN_REGEXEC_C) || defined(PERL_IN_TOKE_C)
11 /* An element is in an inversion list iff its index is even numbered: 0, 2, 4,
13 #define ELEMENT_RANGE_MATCHES_INVLIST(i) (! ((i) & 1))
14 #define PREV_RANGE_MATCHES_INVLIST(i) (! ELEMENT_RANGE_MATCHES_INVLIST(i))
16 /* This converts to/from our UVs to what the SV code is expecting: bytes. */
17 #define TO_INTERNAL_SIZE(x) ((x) * sizeof(UV))
18 #define FROM_INTERNAL_SIZE(x) ((x)/ sizeof(UV))
20 PERL_STATIC_INLINE bool
21 S_is_invlist(SV* const invlist)
23 PERL_ARGS_ASSERT_IS_INVLIST;
25 return SvTYPE(invlist) == SVt_INVLIST;
28 PERL_STATIC_INLINE bool*
29 S_get_invlist_offset_addr(SV* invlist)
31 /* Return the address of the field that says whether the inversion list is
32 * offset (it contains 1) or not (contains 0) */
33 PERL_ARGS_ASSERT_GET_INVLIST_OFFSET_ADDR;
35 assert(is_invlist(invlist));
37 return &(((XINVLIST*) SvANY(invlist))->is_offset);
41 S__invlist_len(SV* const invlist)
43 /* Returns the current number of elements stored in the inversion list's
46 PERL_ARGS_ASSERT__INVLIST_LEN;
48 assert(is_invlist(invlist));
50 return (SvCUR(invlist) == 0)
52 : FROM_INTERNAL_SIZE(SvCUR(invlist)) - *get_invlist_offset_addr(invlist);
55 PERL_STATIC_INLINE bool
56 S__invlist_contains_cp(SV* const invlist, const UV cp)
58 /* Does <invlist> contain code point <cp> as part of the set? */
60 IV index = _invlist_search(invlist, cp);
62 PERL_ARGS_ASSERT__INVLIST_CONTAINS_CP;
64 return index >= 0 && ELEMENT_RANGE_MATCHES_INVLIST(index);
67 PERL_STATIC_INLINE UV*
68 S_invlist_array(SV* const invlist)
70 /* Returns the pointer to the inversion list's array. Every time the
71 * length changes, this needs to be called in case malloc or realloc moved
74 PERL_ARGS_ASSERT_INVLIST_ARRAY;
76 /* Must not be empty. If these fail, you probably didn't check for <len>
77 * being non-zero before trying to get the array */
78 assert(_invlist_len(invlist));
80 /* The very first element always contains zero, The array begins either
81 * there, or if the inversion list is offset, at the element after it.
82 * The offset header field determines which; it contains 0 or 1 to indicate
83 * how much additionally to add */
84 assert(0 == *(SvPVX(invlist)));
85 return ((UV *) SvPVX(invlist) + *get_invlist_offset_addr(invlist));
88 # if defined(PERL_IN_REGEXEC_C)
90 /* These symbols are only needed later in regcomp.c */
91 # undef TO_INTERNAL_SIZE
92 # undef FROM_INTERNAL_SIZE