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 PERL_ARGS_ASSERT_IS_INVLIST;
28 return SvTYPE(invlist) == SVt_INVLIST;
31 PERL_STATIC_INLINE bool*
32 S_get_invlist_offset_addr(SV* invlist)
34 /* Return the address of the field that says whether the inversion list is
35 * offset (it contains 1) or not (contains 0) */
36 PERL_ARGS_ASSERT_GET_INVLIST_OFFSET_ADDR;
38 assert(is_invlist(invlist));
40 return &(((XINVLIST*) SvANY(invlist))->is_offset);
44 S__invlist_len(SV* const invlist)
46 /* Returns the current number of elements stored in the inversion list's
49 PERL_ARGS_ASSERT__INVLIST_LEN;
51 assert(is_invlist(invlist));
53 return (SvCUR(invlist) == 0)
55 : FROM_INTERNAL_SIZE(SvCUR(invlist)) - *get_invlist_offset_addr(invlist);
58 PERL_STATIC_INLINE bool
59 S__invlist_contains_cp(SV* const invlist, const UV cp)
61 /* Does <invlist> contain code point <cp> as part of the set? */
63 IV index = _invlist_search(invlist, cp);
65 PERL_ARGS_ASSERT__INVLIST_CONTAINS_CP;
67 return index >= 0 && ELEMENT_RANGE_MATCHES_INVLIST(index);
70 PERL_STATIC_INLINE UV*
71 S_invlist_array(SV* const invlist)
73 /* Returns the pointer to the inversion list's array. Every time the
74 * length changes, this needs to be called in case malloc or realloc moved
77 PERL_ARGS_ASSERT_INVLIST_ARRAY;
79 /* Must not be empty. If these fail, you probably didn't check for <len>
80 * being non-zero before trying to get the array */
81 assert(_invlist_len(invlist));
83 /* The very first element always contains zero, The array begins either
84 * there, or if the inversion list is offset, at the element after it.
85 * The offset header field determines which; it contains 0 or 1 to indicate
86 * how much additionally to add */
87 assert(0 == *(SvPVX(invlist)));
88 return ((UV *) SvPVX(invlist) + *get_invlist_offset_addr(invlist));
91 # if defined(PERL_IN_REGEXEC_C)
93 /* These symbols are only needed later in regcomp.c */
94 # undef TO_INTERNAL_SIZE
95 # undef FROM_INTERNAL_SIZE
100 #endif /* PERL_INVLIST_INLINE_H_ */