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d812d165 | 1 | /* inline_invlist.c |
81e983c1 KW |
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. | |
81e983c1 KW |
7 | */ |
8 | ||
9 | #if defined(PERL_IN_UTF8_C) || defined(PERL_IN_REGCOMP_C) || defined(PERL_IN_REGEXEC_C) | |
10 | ||
9e7f4f43 KW |
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 | ||
4c60406d KW |
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 | ||
20 | PERL_STATIC_INLINE bool* | |
dc3bf405 | 21 | S_get_invlist_offset_addr(SV* invlist) |
9e7f4f43 | 22 | { |
4c60406d KW |
23 | /* Return the address of the field that says whether the inversion list is |
24 | * offset (it contains 1) or not (contains 0) */ | |
4c60406d | 25 | PERL_ARGS_ASSERT_GET_INVLIST_OFFSET_ADDR; |
9e7f4f43 | 26 | |
f49d8074 KW |
27 | assert(SvTYPE(invlist) == SVt_INVLIST); |
28 | ||
4c60406d | 29 | return &(((XINVLIST*) SvANY(invlist))->is_offset); |
9e7f4f43 KW |
30 | } |
31 | ||
32 | PERL_STATIC_INLINE UV | |
dc3bf405 | 33 | S__invlist_len(SV* const invlist) |
9e7f4f43 KW |
34 | { |
35 | /* Returns the current number of elements stored in the inversion list's | |
36 | * array */ | |
37 | ||
38 | PERL_ARGS_ASSERT__INVLIST_LEN; | |
39 | ||
f49d8074 KW |
40 | assert(SvTYPE(invlist) == SVt_INVLIST); |
41 | ||
4c60406d KW |
42 | return (SvCUR(invlist) == 0) |
43 | ? 0 | |
44 | : FROM_INTERNAL_SIZE(SvCUR(invlist)) - *get_invlist_offset_addr(invlist); | |
9e7f4f43 KW |
45 | } |
46 | ||
47 | PERL_STATIC_INLINE bool | |
dc3bf405 | 48 | S__invlist_contains_cp(SV* const invlist, const UV cp) |
9e7f4f43 KW |
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 | ||
551cedb5 KW |
59 | PERL_STATIC_INLINE UV* |
60 | S_invlist_array(SV* const invlist) | |
61 | { | |
62 | /* Returns the pointer to the inversion list's array. Every time the | |
63 | * length changes, this needs to be called in case malloc or realloc moved | |
64 | * it */ | |
65 | ||
66 | PERL_ARGS_ASSERT_INVLIST_ARRAY; | |
67 | ||
68 | /* Must not be empty. If these fail, you probably didn't check for <len> | |
69 | * being non-zero before trying to get the array */ | |
70 | assert(_invlist_len(invlist)); | |
71 | ||
72 | /* The very first element always contains zero, The array begins either | |
73 | * there, or if the inversion list is offset, at the element after it. | |
74 | * The offset header field determines which; it contains 0 or 1 to indicate | |
75 | * how much additionally to add */ | |
76 | assert(0 == *(SvPVX(invlist))); | |
77 | return ((UV *) SvPVX(invlist) + *get_invlist_offset_addr(invlist)); | |
78 | } | |
79 | ||
4c60406d KW |
80 | # if defined(PERL_IN_UTF8_C) || defined(PERL_IN_REGEXEC_C) |
81 | ||
82 | /* These symbols are only needed later in regcomp.c */ | |
83 | # undef TO_INTERNAL_SIZE | |
84 | # undef FROM_INTERNAL_SIZE | |
85 | # endif | |
86 | ||
81e983c1 | 87 | #endif |