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/* inline_invlist.c
*
* Copyright (C) 2012 by Larry Wall and others
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
*/
#if defined(PERL_IN_UTF8_C) || defined(PERL_IN_REGCOMP_C) || defined(PERL_IN_REGEXEC_C)
/* An element is in an inversion list iff its index is even numbered: 0, 2, 4,
* etc */
#define ELEMENT_RANGE_MATCHES_INVLIST(i) (! ((i) & 1))
#define PREV_RANGE_MATCHES_INVLIST(i) (! ELEMENT_RANGE_MATCHES_INVLIST(i))
/* This converts to/from our UVs to what the SV code is expecting: bytes. */
#define TO_INTERNAL_SIZE(x) ((x) * sizeof(UV))
#define FROM_INTERNAL_SIZE(x) ((x)/ sizeof(UV))
PERL_STATIC_INLINE bool*
S_get_invlist_offset_addr(SV* invlist)
{
/* Return the address of the field that says whether the inversion list is
* offset (it contains 1) or not (contains 0) */
PERL_ARGS_ASSERT_GET_INVLIST_OFFSET_ADDR;
assert(SvTYPE(invlist) == SVt_INVLIST);
return &(((XINVLIST*) SvANY(invlist))->is_offset);
}
PERL_STATIC_INLINE UV
S__invlist_len(SV* const invlist)
{
/* Returns the current number of elements stored in the inversion list's
* array */
PERL_ARGS_ASSERT__INVLIST_LEN;
assert(SvTYPE(invlist) == SVt_INVLIST);
return (SvCUR(invlist) == 0)
? 0
: FROM_INTERNAL_SIZE(SvCUR(invlist)) - *get_invlist_offset_addr(invlist);
}
PERL_STATIC_INLINE bool
S__invlist_contains_cp(SV* const invlist, const UV cp)
{
/* Does <invlist> contain code point <cp> as part of the set? */
IV index = _invlist_search(invlist, cp);
PERL_ARGS_ASSERT__INVLIST_CONTAINS_CP;
return index >= 0 && ELEMENT_RANGE_MATCHES_INVLIST(index);
}
PERL_STATIC_INLINE UV*
S_invlist_array(SV* const invlist)
{
/* Returns the pointer to the inversion list's array. Every time the
* length changes, this needs to be called in case malloc or realloc moved
* it */
PERL_ARGS_ASSERT_INVLIST_ARRAY;
/* Must not be empty. If these fail, you probably didn't check for <len>
* being non-zero before trying to get the array */
assert(_invlist_len(invlist));
/* The very first element always contains zero, The array begins either
* there, or if the inversion list is offset, at the element after it.
* The offset header field determines which; it contains 0 or 1 to indicate
* how much additionally to add */
assert(0 == *(SvPVX(invlist)));
return ((UV *) SvPVX(invlist) + *get_invlist_offset_addr(invlist));
}
# if defined(PERL_IN_UTF8_C) || defined(PERL_IN_REGEXEC_C)
/* These symbols are only needed later in regcomp.c */
# undef TO_INTERNAL_SIZE
# undef FROM_INTERNAL_SIZE
# endif
#endif
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