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Remove redundant field from inversion lists
[perl5.git] / inline_invlist.c
CommitLineData
d812d165 1/* inline_invlist.c
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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.
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7 */
8
9#if defined(PERL_IN_UTF8_C) || defined(PERL_IN_REGCOMP_C) || defined(PERL_IN_REGEXEC_C)
10
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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
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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(pTHX_ SV* invlist)
9e7f4f43 22{
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23 /* Return the address of the field that says whether the inversion list is
24 * offset (it contains 1) or not (contains 0) */
9e7f4f43 25
4c60406d 26 PERL_ARGS_ASSERT_GET_INVLIST_OFFSET_ADDR;
9e7f4f43 27
4c60406d 28 return &(((XINVLIST*) SvANY(invlist))->is_offset);
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29}
30
31PERL_STATIC_INLINE UV
32S__invlist_len(pTHX_ SV* const invlist)
33{
34 /* Returns the current number of elements stored in the inversion list's
35 * array */
36
37 PERL_ARGS_ASSERT__INVLIST_LEN;
38
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39 return (SvCUR(invlist) == 0)
40 ? 0
41 : FROM_INTERNAL_SIZE(SvCUR(invlist)) - *get_invlist_offset_addr(invlist);
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42}
43
44PERL_STATIC_INLINE bool
45S__invlist_contains_cp(pTHX_ SV* const invlist, const UV cp)
46{
47 /* Does <invlist> contain code point <cp> as part of the set? */
48
49 IV index = _invlist_search(invlist, cp);
50
51 PERL_ARGS_ASSERT__INVLIST_CONTAINS_CP;
52
53 return index >= 0 && ELEMENT_RANGE_MATCHES_INVLIST(index);
54}
55
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56# if defined(PERL_IN_UTF8_C) || defined(PERL_IN_REGEXEC_C)
57
58/* These symbols are only needed later in regcomp.c */
59# undef TO_INTERNAL_SIZE
60# undef FROM_INTERNAL_SIZE
61# endif
62
81e983c1 63#endif