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regcomp.c: Reorder two switch cases
[perl5.git] / inline_invlist.c
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1/* inline_invlist.c
2 *
3 * Copyright (C) 2012 by Larry Wall and others
4 *
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.
7 */
8
9#if defined(PERL_IN_UTF8_C) || defined(PERL_IN_REGCOMP_C) || defined(PERL_IN_REGEXEC_C)
10
11/* An element is in an inversion list iff its index is even numbered: 0, 2, 4,
12 * etc */
13#define ELEMENT_RANGE_MATCHES_INVLIST(i) (! ((i) & 1))
14#define PREV_RANGE_MATCHES_INVLIST(i) (! ELEMENT_RANGE_MATCHES_INVLIST(i))
15
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))
19
20PERL_STATIC_INLINE bool*
21S_get_invlist_offset_addr(SV* invlist)
22{
23 /* Return the address of the field that says whether the inversion list is
24 * offset (it contains 1) or not (contains 0) */
25 PERL_ARGS_ASSERT_GET_INVLIST_OFFSET_ADDR;
26
27 assert(SvTYPE(invlist) == SVt_INVLIST);
28
29 return &(((XINVLIST*) SvANY(invlist))->is_offset);
30}
31
32PERL_STATIC_INLINE UV
33S__invlist_len(SV* const invlist)
34{
35 /* Returns the current number of elements stored in the inversion list's
36 * array */
37
38 PERL_ARGS_ASSERT__INVLIST_LEN;
39
40 assert(SvTYPE(invlist) == SVt_INVLIST);
41
42 return (SvCUR(invlist) == 0)
43 ? 0
44 : FROM_INTERNAL_SIZE(SvCUR(invlist)) - *get_invlist_offset_addr(invlist);
45}
46
47PERL_STATIC_INLINE bool
48S__invlist_contains_cp(SV* const invlist, const UV cp)
49{
50 /* Does <invlist> contain code point <cp> as part of the set? */
51
52 IV index = _invlist_search(invlist, cp);
53
54 PERL_ARGS_ASSERT__INVLIST_CONTAINS_CP;
55
56 return index >= 0 && ELEMENT_RANGE_MATCHES_INVLIST(index);
57}
58
59# if defined(PERL_IN_UTF8_C) || defined(PERL_IN_REGEXEC_C)
60
61/* These symbols are only needed later in regcomp.c */
62# undef TO_INTERNAL_SIZE
63# undef FROM_INTERNAL_SIZE
64# endif
65
66#endif