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 #ifndef PERL_INVLIST_INLINE_H_
10 #define PERL_INVLIST_INLINE_H_
12 #if defined(PERL_IN_UTF8_C) || defined(PERL_IN_REGCOMP_C) || defined(PERL_IN_REGEXEC_C) || defined(PERL_IN_TOKE_C) || defined(PERL_IN_PP_C)
14 /* An element is in an inversion list iff its index is even numbered: 0, 2, 4,
16 #define ELEMENT_RANGE_MATCHES_INVLIST(i) (! ((i) & 1))
17 #define PREV_RANGE_MATCHES_INVLIST(i) (! ELEMENT_RANGE_MATCHES_INVLIST(i))
19 /* This converts to/from our UVs to what the SV code is expecting: bytes. */
20 #define TO_INTERNAL_SIZE(x) ((x) * sizeof(UV))
21 #define FROM_INTERNAL_SIZE(x) ((x)/ sizeof(UV))
23 PERL_STATIC_INLINE bool
24 S_is_invlist(SV* const invlist)
26 return invlist != NULL && SvTYPE(invlist) == SVt_INVLIST;
29 PERL_STATIC_INLINE bool*
30 S_get_invlist_offset_addr(SV* invlist)
32 /* Return the address of the field that says whether the inversion list is
33 * offset (it contains 1) or not (contains 0) */
34 PERL_ARGS_ASSERT_GET_INVLIST_OFFSET_ADDR;
36 assert(is_invlist(invlist));
38 return &(((XINVLIST*) SvANY(invlist))->is_offset);
42 S__invlist_len(SV* const invlist)
44 /* Returns the current number of elements stored in the inversion list's
47 PERL_ARGS_ASSERT__INVLIST_LEN;
49 assert(is_invlist(invlist));
51 return (SvCUR(invlist) == 0)
53 : FROM_INTERNAL_SIZE(SvCUR(invlist)) - *get_invlist_offset_addr(invlist);
56 PERL_STATIC_INLINE bool
57 S__invlist_contains_cp(SV* const invlist, const UV cp)
59 /* Does <invlist> contain code point <cp> as part of the set? */
61 IV index = _invlist_search(invlist, cp);
63 PERL_ARGS_ASSERT__INVLIST_CONTAINS_CP;
65 return index >= 0 && ELEMENT_RANGE_MATCHES_INVLIST(index);
68 PERL_STATIC_INLINE UV*
69 S_invlist_array(SV* const invlist)
71 /* Returns the pointer to the inversion list's array. Every time the
72 * length changes, this needs to be called in case malloc or realloc moved
75 PERL_ARGS_ASSERT_INVLIST_ARRAY;
77 /* Must not be empty. If these fail, you probably didn't check for <len>
78 * being non-zero before trying to get the array */
79 assert(_invlist_len(invlist));
81 /* The very first element always contains zero, The array begins either
82 * there, or if the inversion list is offset, at the element after it.
83 * The offset header field determines which; it contains 0 or 1 to indicate
84 * how much additionally to add */
85 assert(0 == *(SvPVX(invlist)));
86 return ((UV *) SvPVX(invlist) + *get_invlist_offset_addr(invlist));
89 # if defined(PERL_IN_REGEXEC_C)
91 /* These symbols are only needed later in regcomp.c */
92 # undef TO_INTERNAL_SIZE
93 # undef FROM_INTERNAL_SIZE
98 #endif /* PERL_INVLIST_INLINE_H_ */