#define STATIC static
#endif
-#ifndef MIN
-#define MIN(a,b) ((a) < (b) ? (a) : (b))
-#endif
-
-#ifndef MAX
-#define MAX(a,b) ((a) > (b) ? (a) : (b))
-#endif
-
/* this is a chain of data about sub patterns we are processing that
need to be handled separately/specially in study_chunk. Its so
we can simulate recursion without losing state. */
assert(is_ANYOF_SYNTHETIC(ssc));
- ssc->invlist = sv_2mortal(_new_invlist(2)); /* mortalize so won't leak */
- _append_range_to_invlist(ssc->invlist, 0, UV_MAX);
+ /* mortalize so won't leak */
+ ssc->invlist = sv_2mortal(_add_range_to_invlist(NULL, 0, UV_MAX));
ANYOF_FLAGS(ssc) |= SSC_MATCHES_EMPTY_STRING; /* Plus matches empty */
}
sv_catsv_nomg(pat, msv);
rx = msv;
}
- else
- pat = msv;
+ else {
+ /* We have only one SV to process, but we need to verify
+ * it is properly null terminated or we will fail asserts
+ * later. In theory we probably shouldn't get such SV's,
+ * but if we do we should handle it gracefully. */
+ if ( SvTYPE(msv) != SVt_PV || (SvLEN(msv) > SvCUR(msv) && *(SvEND(msv)) == 0) ) {
+ /* not a string, or a string with a trailing null */
+ pat = msv;
+ } else {
+ /* a string with no trailing null, we need to copy it
+ * so it we have a trailing null */
+ pat = newSVsv(msv);
+ }
+ }
if (code)
pRExC_state->code_blocks[n-1].end = SvCUR(pat)-1;
* as an SVt_INVLIST scalar.
*
* An inversion list for Unicode is an array of code points, sorted by ordinal
- * number. The zeroth element is the first code point in the list. The 1th
- * element is the first element beyond that not in the list. In other words,
- * the first range is
- * invlist[0]..(invlist[1]-1)
- * The other ranges follow. Thus every element whose index is divisible by two
- * marks the beginning of a range that is in the list, and every element not
- * divisible by two marks the beginning of a range not in the list. A single
- * element inversion list that contains the single code point N generally
- * consists of two elements
- * invlist[0] == N
- * invlist[1] == N+1
- * (The exception is when N is the highest representable value on the
- * machine, in which case the list containing just it would be a single
- * element, itself. By extension, if the last range in the list extends to
- * infinity, then the first element of that range will be in the inversion list
- * at a position that is divisible by two, and is the final element in the
- * list.)
+ * number. Each element gives the code point that begins a range that extends
+ * up-to but not including the code point given by the next element. The final
+ * element gives the first code point of a range that extends to the platform's
+ * infinity. The even-numbered elements (invlist[0], invlist[2], invlist[4],
+ * ...) give ranges whose code points are all in the inversion list. We say
+ * that those ranges are in the set. The odd-numbered elements give ranges
+ * whose code points are not in the inversion list, and hence not in the set.
+ * Thus, element [0] is the first code point in the list. Element [1]
+ * is the first code point beyond that not in the list; and element [2] is the
+ * first code point beyond that that is in the list. In other words, the first
+ * range is invlist[0]..(invlist[1]-1), and all code points in that range are
+ * in the inversion list. The second range is invlist[1]..(invlist[2]-1), and
+ * all code points in that range are not in the inversion list. The third
+ * range invlist[2]..(invlist[3]-1) gives code points that are in the inversion
+ * list, and so forth. Thus every element whose index is divisible by two
+ * gives the beginning of a range that is in the list, and every element whose
+ * index is not divisible by two gives the beginning of a range not in the
+ * list. If the final element's index is divisible by two, the inversion list
+ * extends to the platform's infinity; otherwise the highest code point in the
+ * inversion list is the contents of that element minus 1.
+ *
+ * A range that contains just a single code point N will look like
+ * invlist[i] == N
+ * invlist[i+1] == N+1
+ *
+ * If N is UV_MAX (the highest representable code point on the machine), N+1 is
+ * impossible to represent, so element [i+1] is omitted. The single element
+ * inversion list
+ * invlist[0] == UV_MAX
+ * contains just UV_MAX, but is interpreted as matching to infinity.
+ *
* Taking the complement (inverting) an inversion list is quite simple, if the
* first element is 0, remove it; otherwise add a 0 element at the beginning.
* This implementation reserves an element at the beginning of each inversion
* list to always contain 0; there is an additional flag in the header which
* indicates if the list begins at the 0, or is offset to begin at the next
- * element.
+ * element. This means that the inversion list can be inverted without any
+ * copying; just flip the flag.
*
* More about inversion lists can be found in "Unicode Demystified"
* Chapter 13 by Richard Gillam, published by Addison-Wesley.
- * More will be coming when functionality is added later.
*
* The inversion list data structure is currently implemented as an SV pointing
* to an array of UVs that the SV thinks are bytes. This allows us to have an
/* The header definitions are in F<invlist_inline.h> */
+#ifndef PERL_IN_XSUB_RE
+
PERL_STATIC_INLINE UV*
S__invlist_array_init(SV* const invlist, const bool will_have_0)
{
return zero_addr + *offset;
}
+#endif
+
PERL_STATIC_INLINE void
S_invlist_set_len(pTHX_ SV* const invlist, const UV len, const bool offset)
{
return *(get_invlist_iter_addr(invlist)) < (STRLEN) UV_MAX;
}
+#ifndef PERL_IN_XSUB_RE
+
PERL_STATIC_INLINE UV
S_invlist_max(SV* const invlist)
{
? FROM_INTERNAL_SIZE(SvCUR(invlist)) - 1
: FROM_INTERNAL_SIZE(SvLEN(invlist)) - 1;
}
-
-#ifndef PERL_IN_XSUB_RE
SV*
Perl__new_invlist(pTHX_ IV initial_size)
{
return invlist;
}
-#endif /* ifndef PERL_IN_XSUB_RE */
STATIC void
S_invlist_extend(pTHX_ SV* const invlist, const UV new_max)
UV final_element = len - 1;
array = invlist_array(invlist);
- if (array[final_element] > start
+ if ( array[final_element] > start
|| ELEMENT_RANGE_MATCHES_INVLIST(final_element))
{
Perl_croak(aTHX_ "panic: attempting to append to an inversion list, but wasn't at the end of the list, final=%"UVuf", start=%"UVuf", match=%c",
ELEMENT_RANGE_MATCHES_INVLIST(final_element) ? 't' : 'f');
}
- /* Here, it is a legal append. If the new range begins with the first
- * value not in the set, it is extending the set, so the new first
- * value not in the set is one greater than the newly extended range.
- * */
+ /* Here, it is a legal append. If the new range begins 1 above the end
+ * of the range below it, it is extending the range below it, so the
+ * new first value not in the set is one greater than the newly
+ * extended range. */
offset = *get_invlist_offset_addr(invlist);
if (array[final_element] == start) {
if (end != UV_MAX) {
}
else {
/* But if the end is the maximum representable on the machine,
- * just let the range that this would extend to have no end */
+ * assume that infinity was actually what was meant. Just let
+ * the range that this would extend to have no end */
invlist_set_len(invlist, len - 1, offset);
}
return;
}
}
-#ifndef PERL_IN_XSUB_RE
-
SSize_t
Perl__invlist_search(SV* const invlist, const UV cp)
{
* It's easiest to create a new inversion list that matches everything.
* */
if (complement_b) {
- SV* everything = _new_invlist(1);
- _append_range_to_invlist(everything, 0, UV_MAX);
+ SV* everything = _add_range_to_invlist(NULL, 0, UV_MAX);
/* If the output didn't exist, just point it at the new list */
if (*output == NULL) {
}
}
+
/* The loop above increments the index into exactly one of the input lists
* each iteration, and ends when either index gets to its list end. That
* means the other index is lower than its end, and so something is
* remaining in that one. We increment 'count', as explained below, if the
- * exhausted list was in its set. (i_a and i_b each currently index the element
- * beyond the one we care about.) */
+ * exhausted list was in its set. (i_a and i_b each currently index the
+ * element beyond the one we care about.) */
if ( (i_a == len_a && PREV_RANGE_MATCHES_INVLIST(i_a))
|| (i_b == len_b && PREV_RANGE_MATCHES_INVLIST(i_b)))
{
}
SV*
-Perl__add_range_to_invlist(pTHX_ SV* invlist, const UV start, const UV end)
+Perl__add_range_to_invlist(pTHX_ SV* invlist, UV start, UV end)
{
/* Add the range from 'start' to 'end' inclusive to the inversion list's
* set. A pointer to the inversion list is returned. This may actually be
* a new list, in which case the passed in one has been destroyed. The
* passed-in inversion list can be NULL, in which case a new one is created
- * with just the one range in it */
-
- SV* range_invlist;
- UV len;
-
+ * with just the one range in it. The new list is not necessarily
+ * NUL-terminated. Space is not freed if the inversion list shrinks as a
+ * result of this function. The gain would not be large, and in many
+ * cases, this is called multiple times on a single inversion list, so
+ * anything freed may almost immediately be needed again.
+ *
+ * This used to mostly call the 'union' routine, but that is much more
+ * heavyweight than really needed for a single range addition */
+
+ UV* array; /* The array implementing the inversion list */
+ UV len; /* How many elements in 'array' */
+ SSize_t i_s; /* index into the invlist array where 'start'
+ should go */
+ SSize_t i_e = 0; /* And the index where 'end' should go */
+ UV cur_highest; /* The highest code point in the inversion list
+ upon entry to this function */
+
+ /* This range becomes the whole inversion list if none already existed */
if (invlist == NULL) {
invlist = _new_invlist(2);
- len = 0;
+ _append_range_to_invlist(invlist, start, end);
+ return invlist;
}
- else {
- len = _invlist_len(invlist);
+
+ /* Likewise, if the inversion list is currently empty */
+ len = _invlist_len(invlist);
+ if (len == 0) {
+ _append_range_to_invlist(invlist, start, end);
+ return invlist;
}
- /* If comes after the final entry actually in the list, can just append it
- * to the end, */
- if (len == 0
- || (! ELEMENT_RANGE_MATCHES_INVLIST(len - 1)
- && start >= invlist_array(invlist)[len - 1]))
- {
- _append_range_to_invlist(invlist, start, end);
- return invlist;
+ /* Starting here, we have to know the internals of the list */
+ array = invlist_array(invlist);
+
+ /* If the new range ends higher than the current highest ... */
+ cur_highest = invlist_highest(invlist);
+ if (end > cur_highest) {
+
+ /* If the whole range is higher, we can just append it */
+ if (start > cur_highest) {
+ _append_range_to_invlist(invlist, start, end);
+ return invlist;
+ }
+
+ /* Otherwise, add the portion that is higher ... */
+ _append_range_to_invlist(invlist, cur_highest + 1, end);
+
+ /* ... and continue on below to handle the rest. As a result of the
+ * above append, we know that the index of the end of the range is the
+ * final even numbered one of the array. Recall that the final element
+ * always starts a range that extends to infinity. If that range is in
+ * the set (meaning the set goes from here to infinity), it will be an
+ * even index, but if it isn't in the set, it's odd, and the final
+ * range in the set is one less, which is even. */
+ if (end == UV_MAX) {
+ i_e = len;
+ }
+ else {
+ i_e = len - 2;
+ }
+ }
+
+ /* We have dealt with appending, now see about prepending. If the new
+ * range starts lower than the current lowest ... */
+ if (start < array[0]) {
+
+ /* Adding something which has 0 in it is somewhat tricky, and uncommon.
+ * Let the union code handle it, rather than having to know the
+ * trickiness in two code places. */
+ if (UNLIKELY(start == 0)) {
+ SV* range_invlist;
+
+ range_invlist = _new_invlist(2);
+ _append_range_to_invlist(range_invlist, start, end);
+
+ _invlist_union(invlist, range_invlist, &invlist);
+
+ SvREFCNT_dec_NN(range_invlist);
+
+ return invlist;
+ }
+
+ /* If the whole new range comes before the first entry, and doesn't
+ * extend it, we have to insert it as an additional range */
+ if (end < array[0] - 1) {
+ i_s = i_e = -1;
+ goto splice_in_new_range;
+ }
+
+ /* Here the new range adjoins the existing first range, extending it
+ * downwards. */
+ array[0] = start;
+
+ /* And continue on below to handle the rest. We know that the index of
+ * the beginning of the range is the first one of the array */
+ i_s = 0;
+ }
+ else { /* Not prepending any part of the new range to the existing list.
+ * Find where in the list it should go. This finds i_s, such that:
+ * invlist[i_s] <= start < array[i_s+1]
+ */
+ i_s = _invlist_search(invlist, start);
}
- /* Here, can't just append things, create and return a new inversion list
- * which is the union of this range and the existing inversion list. (If
- * the new range is well-behaved wrt to the old one, we could just insert
- * it, doing a Move() down on the tail of the old one (potentially growing
- * it first). But to determine that means we would have the extra
- * (possibly throw-away) work of first finding where the new one goes and
- * whether it disrupts (splits) an existing range, so it doesn't appear to
- * me (khw) that it's worth it) */
- range_invlist = _new_invlist(2);
- _append_range_to_invlist(range_invlist, start, end);
+ /* At this point, any extending before the beginning of the inversion list
+ * and/or after the end has been done. This has made it so that, in the
+ * code below, each endpoint of the new range is either in a range that is
+ * in the set, or is in a gap between two ranges that are. This means we
+ * don't have to worry about exceeding the array bounds.
+ *
+ * Find where in the list the new range ends (but we can skip this if we
+ * have already determined what it is, or if it will be the same as i_s,
+ * which we already have computed) */
+ if (i_e == 0) {
+ i_e = (start == end)
+ ? i_s
+ : _invlist_search(invlist, end);
+ }
+
+ /* Here generally invlist[i_e] <= end < array[i_e+1]. But if invlist[i_e]
+ * is a range that goes to infinity there is no element at invlist[i_e+1],
+ * so only the first relation holds. */
+
+ if ( ! ELEMENT_RANGE_MATCHES_INVLIST(i_s)) {
+
+ /* Here, the ranges on either side of the beginning of the new range
+ * are in the set, and this range starts in the gap between them.
+ *
+ * The new range extends the range above it downwards if the new range
+ * ends at or above that range's start */
+ const bool extends_the_range_above = ( end == UV_MAX
+ || end + 1 >= array[i_s+1]);
+
+ /* The new range extends the range below it upwards if it begins just
+ * after where that range ends */
+ if (start == array[i_s]) {
+
+ /* If the new range fills the entire gap between the other ranges,
+ * they will get merged together. Other ranges may also get
+ * merged, depending on how many of them the new range spans. In
+ * the general case, we do the merge later, just once, after we
+ * figure out how many to merge. But in the case where the new
+ * range exactly spans just this one gap (possibly extending into
+ * the one above), we do the merge here, and an early exit. This
+ * is done here to avoid having to special case later. */
+ if (i_e - i_s <= 1) {
+
+ /* If i_e - i_s == 1, it means that the new range terminates
+ * within the range above, and hence 'extends_the_range_above'
+ * must be true. (If the range above it extends to infinity,
+ * 'i_s+2' will be above the array's limit, but 'len-i_s-2'
+ * will be 0, so no harm done.) */
+ if (extends_the_range_above) {
+ Move(array + i_s + 2, array + i_s, len - i_s - 2, UV);
+ invlist_set_len(invlist,
+ len - 2,
+ *(get_invlist_offset_addr(invlist)));
+ return invlist;
+ }
+
+ /* Here, i_e must == i_s. We keep them in sync, as they apply
+ * to the same range, and below we are about to decrement i_s
+ * */
+ i_e--;
+ }
+
+ /* Here, the new range is adjacent to the one below. (It may also
+ * span beyond the range above, but that will get resolved later.)
+ * Extend the range below to include this one. */
+ array[i_s] = (end == UV_MAX) ? UV_MAX : end + 1;
+ i_s--;
+ start = array[i_s];
+ }
+ else if (extends_the_range_above) {
+
+ /* Here the new range only extends the range above it, but not the
+ * one below. It merges with the one above. Again, we keep i_e
+ * and i_s in sync if they point to the same range */
+ if (i_e == i_s) {
+ i_e++;
+ }
+ i_s++;
+ array[i_s] = start;
+ }
+ }
- _invlist_union(invlist, range_invlist, &invlist);
+ /* Here, we've dealt with the new range start extending any adjoining
+ * existing ranges.
+ *
+ * If the new range extends to infinity, it is now the final one,
+ * regardless of what was there before */
+ if (UNLIKELY(end == UV_MAX)) {
+ invlist_set_len(invlist, i_s + 1, *(get_invlist_offset_addr(invlist)));
+ return invlist;
+ }
- /* The temporary can be freed */
- SvREFCNT_dec_NN(range_invlist);
+ /* If i_e started as == i_s, it has also been dealt with,
+ * and been updated to the new i_s, which will fail the following if */
+ if (! ELEMENT_RANGE_MATCHES_INVLIST(i_e)) {
+
+ /* Here, the ranges on either side of the end of the new range are in
+ * the set, and this range ends in the gap between them.
+ *
+ * If this range is adjacent to (hence extends) the range above it, it
+ * becomes part of that range; likewise if it extends the range below,
+ * it becomes part of that range */
+ if (end + 1 == array[i_e+1]) {
+ i_e++;
+ array[i_e] = start;
+ }
+ else if (start <= array[i_e]) {
+ array[i_e] = end + 1;
+ i_e--;
+ }
+ }
+
+ if (i_s == i_e) {
+
+ /* If the range fits entirely in an existing range (as possibly already
+ * extended above), it doesn't add anything new */
+ if (ELEMENT_RANGE_MATCHES_INVLIST(i_s)) {
+ return invlist;
+ }
+
+ /* Here, no part of the range is in the list. Must add it. It will
+ * occupy 2 more slots */
+ splice_in_new_range:
+
+ invlist_extend(invlist, len + 2);
+ array = invlist_array(invlist);
+ /* Move the rest of the array down two slots. Don't include any
+ * trailing NUL */
+ Move(array + i_e + 1, array + i_e + 3, len - i_e - 1, UV);
+
+ /* Do the actual splice */
+ array[i_e+1] = start;
+ array[i_e+2] = end + 1;
+ invlist_set_len(invlist, len + 2, *(get_invlist_offset_addr(invlist)));
+ return invlist;
+ }
+
+ /* Here the new range crossed the boundaries of a pre-existing range. The
+ * code above has adjusted things so that both ends are in ranges that are
+ * in the set. This means everything in between must also be in the set.
+ * Just squash things together */
+ Move(array + i_e + 1, array + i_s + 1, len - i_e - 1, UV);
+ invlist_set_len(invlist,
+ len - i_e + i_s,
+ *(get_invlist_offset_addr(invlist)));
return invlist;
}
PERL_ARGS_ASSERT__SETUP_CANNED_INVLIST;
- _append_range_to_invlist(invlist, element0, element0);
+ invlist = add_cp_to_invlist(invlist, element0);
offset = *get_invlist_offset_addr(invlist);
invlist_set_len(invlist, size, offset);
RExC_seen |= REG_LOOKBEHIND_SEEN;
RExC_in_lookbehind++;
RExC_parse++;
- assert(RExC_parse < RExC_end);
+ if (RExC_parse >= RExC_end) {
+ vFAIL("Sequence (?... not terminated");
+ }
+
/* FALLTHROUGH */
case '=': /* (?=...) */
RExC_seen_zerolen++;
}
/* Stack the position of this undealt-with left paren */
- fence = top_index + 1;
av_push(fence_stack, newSViv(fence));
+ fence = top_index + 1;
break;
case '\\':
vFAIL("Unexpected ')'");
}
- /* If at least two thing on the stack, treat this as an
+ /* If nothing after the fence, is missing an operand */
+ if (top_index - fence < 0) {
+ RExC_parse++;
+ goto bad_syntax;
+ }
+ /* If at least two things on the stack, treat this as an
* operator */
if (top_index - fence >= 1) {
goto join_operators;
else if (! SIZE_ONLY) {
/* Here, not in pass1 (in that pass we skip calculating the
- * contents of this class), and is /l, or is a POSIX class for
- * which /l doesn't matter (or is a Unicode property, which is
- * skipped here). */
+ * contents of this class), and is not /l, or is a POSIX class
+ * for which /l doesn't matter (or is a Unicode property, which
+ * is skipped here). */
if (namedclass >= ANYOF_POSIXL_MAX) { /* If a special class */
if (namedclass != ANYOF_UNIPROP) { /* UNIPROP = \p and \P */
&cp_list);
}
}
- else if (UNI_SEMANTICS
+ else if ( UNI_SEMANTICS
|| classnum == _CC_ASCII
- || (DEPENDS_SEMANTICS && (classnum == _CC_DIGIT
+ || (DEPENDS_SEMANTICS && ( classnum == _CC_DIGIT
|| classnum == _CC_XDIGIT)))
{
/* We usually have to worry about /d and /a affecting what
SvREFCNT_dec_NN(cp_foldable_list);
}
- /* And combine the result (if any) with any inversion list from posix
+ /* And combine the result (if any) with any inversion lists from posix
* classes. The lists are kept separate up to now because we don't want to
* fold the classes (folding of those is automatically handled by the swash
* fetching code) */
- if (simple_posixes) {
- _invlist_union(cp_list, simple_posixes, &cp_list);
- SvREFCNT_dec_NN(simple_posixes);
+ if (simple_posixes) { /* These are the classes known to be unaffected by
+ /a, /aa, and /d */
+ if (cp_list) {
+ _invlist_union(cp_list, simple_posixes, &cp_list);
+ SvREFCNT_dec_NN(simple_posixes);
+ }
+ else {
+ cp_list = simple_posixes;
+ }
}
if (posixes || nposixes) {
- if (posixes && AT_LEAST_ASCII_RESTRICTED) {
+
+ /* We have to adjust /a and /aa */
+ if (AT_LEAST_ASCII_RESTRICTED) {
+
/* Under /a and /aa, nothing above ASCII matches these */
- _invlist_intersection(posixes,
- PL_XPosix_ptrs[_CC_ASCII],
- &posixes);
- }
- if (nposixes) {
- if (DEPENDS_SEMANTICS) {
- /* Under /d, everything in the upper half of the Latin1 range
- * matches these complements */
- ANYOF_FLAGS(ret) |= ANYOF_SHARED_d_MATCHES_ALL_NON_UTF8_NON_ASCII_non_d_WARN_SUPER;
+ if (posixes) {
+ _invlist_intersection(posixes,
+ PL_XPosix_ptrs[_CC_ASCII],
+ &posixes);
}
- else if (AT_LEAST_ASCII_RESTRICTED) {
- /* Under /a and /aa, everything above ASCII matches these
- * complements */
+
+ /* Under /a and /aa, everything above ASCII matches these
+ * complements */
+ if (nposixes) {
_invlist_union_complement_2nd(nposixes,
PL_XPosix_ptrs[_CC_ASCII],
&nposixes);
}
- if (posixes) {
- _invlist_union(posixes, nposixes, &posixes);
- SvREFCNT_dec_NN(nposixes);
- }
- else {
- posixes = nposixes;
- }
}
+
if (! DEPENDS_SEMANTICS) {
- if (cp_list) {
- _invlist_union(cp_list, posixes, &cp_list);
- SvREFCNT_dec_NN(posixes);
+
+ /* For everything but /d, we can just add the current 'posixes' and
+ * 'nposixes' to the main list */
+ if (posixes) {
+ if (cp_list) {
+ _invlist_union(cp_list, posixes, &cp_list);
+ SvREFCNT_dec_NN(posixes);
+ }
+ else {
+ cp_list = posixes;
+ }
}
- else {
- cp_list = posixes;
+ if (nposixes) {
+ if (cp_list) {
+ _invlist_union(cp_list, nposixes, &cp_list);
+ SvREFCNT_dec_NN(nposixes);
+ }
+ else {
+ cp_list = nposixes;
+ }
}
}
else {
- /* Under /d, we put into a separate list the Latin1 things that
- * match only when the target string is utf8 */
- SV* nonascii_but_latin1_properties = NULL;
- _invlist_intersection(posixes, PL_UpperLatin1,
- &nonascii_but_latin1_properties);
- _invlist_subtract(posixes, nonascii_but_latin1_properties,
- &posixes);
- if (cp_list) {
- _invlist_union(cp_list, posixes, &cp_list);
- SvREFCNT_dec_NN(posixes);
+ /* Under /d, things like \w match upper Latin1 characters only if
+ * the target string is in UTF-8. But things like \W match all the
+ * upper Latin1 characters if the target string is not in UTF-8.
+ *
+ * Handle the case where there something like \W separately */
+ if (nposixes) {
+ SV* only_non_utf8_list = invlist_clone(PL_UpperLatin1);
+
+ /* A complemented posix class matches all upper Latin1
+ * characters if not in UTF-8. And it matches just certain
+ * ones when in UTF-8. That means those certain ones are
+ * matched regardless, so can just be added to the
+ * unconditional list */
+ if (cp_list) {
+ _invlist_union(cp_list, nposixes, &cp_list);
+ SvREFCNT_dec_NN(nposixes);
+ nposixes = NULL;
+ }
+ else {
+ cp_list = nposixes;
+ }
+
+ /* Likewise for 'posixes' */
+ _invlist_union(posixes, cp_list, &cp_list);
+
+ /* Likewise for anything else in the range that matched only
+ * under UTF-8 */
+ if (has_upper_latin1_only_utf8_matches) {
+ _invlist_union(cp_list,
+ has_upper_latin1_only_utf8_matches,
+ &cp_list);
+ SvREFCNT_dec_NN(has_upper_latin1_only_utf8_matches);
+ has_upper_latin1_only_utf8_matches = NULL;
+ }
+
+ /* If we don't match all the upper Latin1 characters regardless
+ * of UTF-8ness, we have to set a flag to match the rest when
+ * not in UTF-8 */
+ _invlist_subtract(only_non_utf8_list, cp_list,
+ &only_non_utf8_list);
+ if (_invlist_len(only_non_utf8_list) != 0) {
+ ANYOF_FLAGS(ret) |= ANYOF_SHARED_d_MATCHES_ALL_NON_UTF8_NON_ASCII_non_d_WARN_SUPER;
+ }
}
else {
- cp_list = posixes;
- }
-
- if (has_upper_latin1_only_utf8_matches) {
+ /* Here there were no complemented posix classes. That means
+ * the upper Latin1 characters in 'posixes' match only when the
+ * target string is in UTF-8. So we have to add them to the
+ * list of those types of code points, while adding the
+ * remainder to the unconditional list.
+ *
+ * First calculate what they are */
+ SV* nonascii_but_latin1_properties = NULL;
+ _invlist_intersection(posixes, PL_UpperLatin1,
+ &nonascii_but_latin1_properties);
+
+ /* And add them to the final list of such characters. */
_invlist_union(has_upper_latin1_only_utf8_matches,
nonascii_but_latin1_properties,
&has_upper_latin1_only_utf8_matches);
- SvREFCNT_dec_NN(nonascii_but_latin1_properties);
- }
- else {
- has_upper_latin1_only_utf8_matches
- = nonascii_but_latin1_properties;
+
+ /* Remove them from what now becomes the unconditional list */
+ _invlist_subtract(posixes, nonascii_but_latin1_properties,
+ &posixes);
+
+ /* And add those unconditional ones to the final list */
+ if (cp_list) {
+ _invlist_union(cp_list, posixes, &cp_list);
+ SvREFCNT_dec_NN(posixes);
+ posixes = NULL;
+ }
+ else {
+ cp_list = posixes;
+ }
+
+ SvREFCNT_dec(nonascii_but_latin1_properties);
+
+ /* Get rid of any characters that we now know are matched
+ * unconditionally from the conditional list, which may make
+ * that list empty */
+ _invlist_subtract(has_upper_latin1_only_utf8_matches,
+ cp_list,
+ &has_upper_latin1_only_utf8_matches);
+ if (_invlist_len(has_upper_latin1_only_utf8_matches) == 0) {
+ SvREFCNT_dec_NN(has_upper_latin1_only_utf8_matches);
+ has_upper_latin1_only_utf8_matches = NULL;
+ }
}
}
}
invlist_iterfinish(cp_list);
}
}
-
-#define MATCHES_ALL_NON_UTF8_NON_ASCII(ret) \
- ( DEPENDS_SEMANTICS \
- && (ANYOF_FLAGS(ret) \
- & ANYOF_SHARED_d_MATCHES_ALL_NON_UTF8_NON_ASCII_non_d_WARN_SUPER))
-
- /* See if we can simplify things under /d */
- if ( has_upper_latin1_only_utf8_matches
- || MATCHES_ALL_NON_UTF8_NON_ASCII(ret))
+ else if ( DEPENDS_SEMANTICS
+ && ( has_upper_latin1_only_utf8_matches
+ || (ANYOF_FLAGS(ret) & ANYOF_SHARED_d_MATCHES_ALL_NON_UTF8_NON_ASCII_non_d_WARN_SUPER)))
{
- /* But not if we are inverting, as that screws it up */
- if (! invert) {
- if (has_upper_latin1_only_utf8_matches) {
- if (MATCHES_ALL_NON_UTF8_NON_ASCII(ret)) {
-
- /* Here, we have both the flag and inversion list. Any
- * character in 'has_upper_latin1_only_utf8_matches'
- * matches when UTF-8 is in effect, but it also matches
- * when UTF-8 is not in effect because of
- * MATCHES_ALL_NON_UTF8_NON_ASCII. Therefore it matches
- * unconditionally, so can be added to the regular list,
- * and 'has_upper_latin1_only_utf8_matches' cleared */
- _invlist_union(cp_list,
- has_upper_latin1_only_utf8_matches,
- &cp_list);
- SvREFCNT_dec_NN(has_upper_latin1_only_utf8_matches);
- has_upper_latin1_only_utf8_matches = NULL;
- }
- else if (cp_list) {
-
- /* Here, 'cp_list' gives chars that always match, and
- * 'has_upper_latin1_only_utf8_matches' gives chars that
- * were specified to match only if the target string is in
- * UTF-8. It may be that these overlap, so we can subtract
- * the unconditionally matching from the conditional ones,
- * to make the conditional list as small as possible,
- * perhaps even clearing it, in which case more
- * optimizations are possible later */
- _invlist_subtract(has_upper_latin1_only_utf8_matches,
- cp_list,
- &has_upper_latin1_only_utf8_matches);
- if (_invlist_len(has_upper_latin1_only_utf8_matches) == 0) {
- SvREFCNT_dec_NN(has_upper_latin1_only_utf8_matches);
- has_upper_latin1_only_utf8_matches = NULL;
- }
- }
- }
-
- /* Similarly, if the unconditional matches include every upper
- * latin1 character, we can clear that flag to permit later
- * optimizations */
- if (cp_list && MATCHES_ALL_NON_UTF8_NON_ASCII(ret)) {
- SV* only_non_utf8_list = invlist_clone(PL_UpperLatin1);
- _invlist_subtract(only_non_utf8_list, cp_list,
- &only_non_utf8_list);
- if (_invlist_len(only_non_utf8_list) == 0) {
- ANYOF_FLAGS(ret) &= ~ANYOF_SHARED_d_MATCHES_ALL_NON_UTF8_NON_ASCII_non_d_WARN_SUPER;
- }
- SvREFCNT_dec_NN(only_non_utf8_list);
- only_non_utf8_list = NULL;;
- }
- }
-
- /* If we haven't gotten rid of all conditional matching, we change the
- * regnode type to indicate that */
- if ( has_upper_latin1_only_utf8_matches
- || MATCHES_ALL_NON_UTF8_NON_ASCII(ret))
- {
- OP(ret) = ANYOFD;
- optimizable = FALSE;
- }
+ OP(ret) = ANYOFD;
+ optimizable = FALSE;
}
-#undef MATCHES_ALL_NON_UTF8_NON_ASCII
+
/* Optimize inverted simple patterns (e.g. [^a-z]) when everything is known
* at compile time. Besides not inverting folded locale now, we can't
PERL_ARGS_ASSERT_REGPROP;
- sv_setpvn(sv, "", 0);
+ SvPVCLEAR(sv);
if (OP(o) > REGNODE_MAX) /* regnode.type is unsigned */
/* It would be nice to FAIL() here, but this may be called from
* mnemonic names. Split off any of those at the beginning and end of
* the range to print mnemonically. It isn't possible for many of
* these to be in a row, so this won't overwhelm with output */
- while (isMNEMONIC_CNTRL(start) && start <= end) {
- put_code_point(sv, start);
- start++;
- }
- if (start < end && isMNEMONIC_CNTRL(end)) {
-
- /* Here, the final character in the range has a mnemonic name.
- * Work backwards from the end to find the final non-mnemonic */
- UV temp_end = end - 1;
- while (isMNEMONIC_CNTRL(temp_end)) {
- temp_end--;
+ if ( start <= end
+ && (isMNEMONIC_CNTRL(start) || isMNEMONIC_CNTRL(end)))
+ {
+ while (isMNEMONIC_CNTRL(start) && start <= end) {
+ put_code_point(sv, start);
+ start++;
}
- /* And separately output the interior range that doesn't start or
- * end with mnemonics */
- put_range(sv, start, temp_end, FALSE);
+ /* If this didn't take care of the whole range ... */
+ if (start <= end) {
- /* Then output the mnemonic trailing controls */
- start = temp_end + 1;
- while (start <= end) {
- put_code_point(sv, start);
- start++;
+ /* Look backwards from the end to find the final non-mnemonic
+ * */
+ UV temp_end = end;
+ while (isMNEMONIC_CNTRL(temp_end)) {
+ temp_end--;
+ }
+
+ /* And separately output the interior range that doesn't start
+ * or end with mnemonics */
+ put_range(sv, start, temp_end, FALSE);
+
+ /* Then output the mnemonic trailing controls */
+ start = temp_end + 1;
+ while (start <= end) {
+ put_code_point(sv, start);
+ start++;
+ }
+ break;
}
- break;
}
/* As a final resort, output the range or subrange as hex. */
is UTF-8 */
SV* as_is_display; /* The output string when we take the inputs
- literally */
+ literally */
SV* inverted_display; /* The output string when we invert the inputs */
U8 flags = (node) ? ANYOF_FLAGS(node) : 0;
_invlist_invert(only_utf8);
_invlist_intersection(only_utf8, PL_UpperLatin1, &only_utf8);
}
+ else if (not_utf8) {
- if (not_utf8) {
- _invlist_invert(not_utf8);
- _invlist_intersection(not_utf8, PL_UpperLatin1, ¬_utf8);
+ /* If a code point matches iff the target string is not in UTF-8,
+ * then complementing the result has it not match iff not in UTF-8,
+ * which is the same thing as matching iff it is UTF-8. */
+ only_utf8 = not_utf8;
+ not_utf8 = NULL;
}
if (only_utf8_locale) {
#endif
const regnode *nextbranch= NULL;
I32 word_idx;
- sv_setpvs(sv, "");
+ SvPVCLEAR(sv);
for (word_idx= 0; word_idx < (I32)trie->wordcount; word_idx++) {
SV ** const elem_ptr = av_fetch(trie_words,word_idx,0);
https://perl5.git.perl.org / perl5.git / blobdiff