#define STATIC static
#endif
+#ifndef MIN
+#define MIN(a,b) ((a) < (b) ? (a) : (b))
+#endif
struct RExC_state_t {
U32 flags; /* RXf_* are we folding, multilining? */
const char *lastparse;
I32 lastnum;
AV *paren_name_list; /* idx -> name */
+ U32 study_chunk_recursed_count;
#define RExC_lastparse (pRExC_state->lastparse)
#define RExC_lastnum (pRExC_state->lastnum)
#define RExC_paren_name_list (pRExC_state->paren_name_list)
+#define RExC_study_chunk_recursed_count (pRExC_state->study_chunk_recursed_count)
#endif
};
* Simple_vFAIL -- like FAIL, but marks the current location in the scan
*/
#define Simple_vFAIL(m) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
+ const IV offset = \
+ (RExC_parse > RExC_end ? RExC_end : RExC_parse) - RExC_precomp; \
Perl_croak(aTHX_ "%s" REPORT_LOCATION, \
m, REPORT_LOCATION_ARGS(offset)); \
} STMT_END
ANYOF_FLAGS(ssc) &= ~ANYOF_LOCALE_FLAGS;
}
+#define NON_OTHER_COUNT NON_OTHER_COUNT_FOR_USE_ONLY_BY_REGCOMP_DOT_C
+
+STATIC bool
+S_is_ssc_worth_it(const RExC_state_t * pRExC_state, const regnode_ssc * ssc)
+{
+ /* The synthetic start class is used to hopefully quickly winnow down
+ * places where a pattern could start a match in the target string. If it
+ * doesn't really narrow things down that much, there isn't much point to
+ * having the overhead of using it. This function uses some very crude
+ * heuristics to decide if to use the ssc or not.
+ *
+ * It returns TRUE if 'ssc' rules out more than half what it considers to
+ * be the "likely" possible matches, but of course it doesn't know what the
+ * actual things being matched are going to be; these are only guesses
+ *
+ * For /l matches, it assumes that the only likely matches are going to be
+ * in the 0-255 range, uniformly distributed, so half of that is 127
+ * For /a and /d matches, it assumes that the likely matches will be just
+ * the ASCII range, so half of that is 63
+ * For /u and there isn't anything matching above the Latin1 range, it
+ * assumes that that is the only range likely to be matched, and uses
+ * half that as the cut-off: 127. If anything matches above Latin1,
+ * it assumes that all of Unicode could match (uniformly), except for
+ * non-Unicode code points and things in the General Category "Other"
+ * (unassigned, private use, surrogates, controls and formats). This
+ * is a much large number. */
+
+ const U32 max_match = (LOC)
+ ? 127
+ : (! UNI_SEMANTICS)
+ ? 63
+ : (invlist_highest(ssc->invlist) < 256)
+ ? 127
+ : ((NON_OTHER_COUNT + 1) / 2) - 1;
+ U32 count = 0; /* Running total of number of code points matched by
+ 'ssc' */
+ UV start, end; /* Start and end points of current range in inversion
+ list */
+
+ PERL_ARGS_ASSERT_IS_SSC_WORTH_IT;
+
+ invlist_iterinit(ssc->invlist);
+ while (invlist_iternext(ssc->invlist, &start, &end)) {
+
+ /* /u is the only thing that we expect to match above 255; so if not /u
+ * and even if there are matches above 255, ignore them. This catches
+ * things like \d under /d which does match the digits above 255, but
+ * since the pattern is /d, it is not likely to be expecting them */
+ if (! UNI_SEMANTICS) {
+ if (start > 255) {
+ break;
+ }
+ end = MIN(end, 255);
+ }
+ count += end - start + 1;
+ if (count > max_match) {
+ invlist_iterfinish(ssc->invlist);
+ return FALSE;
+ }
+ }
+
+ return TRUE;
+}
+
+
STATIC void
S_ssc_finalize(pTHX_ RExC_state_t *pRExC_state, regnode_ssc *ssc)
{
fake_study_recurse:
+ DEBUG_r(
+ RExC_study_chunk_recursed_count++;
+ );
while ( scan && OP(scan) != END && scan < last ){
UV min_subtract = 0; /* How mmany chars to subtract from the minimum
node length to get a real minimum (because
DEBUG_OPTIMISE_MORE_r(
{
PerlIO_printf(Perl_debug_log,
- "%*sstudy_chunk stopparen=%ld depth=%lu recursed_depth=%lu ",
+ "%*sstudy_chunk stopparen=%ld recursed_count=%lu depth=%lu recursed_depth=%lu ",
((int) depth*2), "", (long)stopparen,
+ (unsigned long)RExC_study_chunk_recursed_count,
(unsigned long)depth, (unsigned long)recursed_depth);
if (recursed_depth) {
U32 i;
regnode *end;
U32 my_recursed_depth= recursed_depth;
- if (OP(scan) != SUSPEND) {
+ if (OP(scan) != SUSPEND) { /* GOSUB/GOSTART */
/* set the pointer */
if (OP(scan) == GOSUB) {
paren = ARG(scan);
start = RExC_rxi->program + 1;
end = RExC_opend;
}
- if (!recursed_depth
+ /* this code is intended to handle expanding regex "subs" so
+ * we can apply various optimizations. For instance with
+ * /(?(DEFINE)(?<foo>foo)(?<bar>bar))(?&foo)(?&bar)/ we
+ * want to recognize that the mandatory substr is going to be
+ * "foobar".
+ * However if we are not in SCF_DO_SUBSTR mode then there is
+ * no point in doing this, and it can cause a serious slowdown.
+ * See RT #122283.
+ * Note also that this was a workaround for the core problem
+ * which was that during compilation logic the excessive
+ * recursion resulted in slowly consuming all the memory on
+ * the box. Exactly what causes this is unclear. It does not
+ * appear to be directly related to allocating the "visited"
+ * bitmaps that is RExC_study_chunk_recursed.
+ *
+ * In reality study_chunk() does far far too much, and probably
+ * this an other issues would go away if we split it into
+ * multiple components.
+ *
+ * - Yves
+ * */
+ if (flags & SCF_DO_SUBSTR) {
+ if (
+ !recursed_depth
||
!PAREN_TEST(RExC_study_chunk_recursed + ((recursed_depth-1) * RExC_study_chunk_recursed_bytes), paren)
) {
+ /* it is quite possible that there are more efficient ways
+ * to do this. We maintain a bitmap per level of recursion
+ * of which patterns we have entered so we can detect if a
+ * pattern creates a possible infinite loop. When we
+ * recurse down a level we copy the previous levels bitmap
+ * down. When we are at recursion level 0 we zero the top
+ * level bitmap. It would be nice to implement a different
+ * more efficient way of doing this. In particular the top
+ * level bitmap may be unnecessary.
+ */
if (!recursed_depth) {
Zero(RExC_study_chunk_recursed, RExC_study_chunk_recursed_bytes, U8);
} else {
ssc_anything(data->start_class);
flags &= ~SCF_DO_STCLASS;
}
+ }
} else {
Newx(newframe,1,scan_frame);
paren = stopparen;
char **pat_p, STRLEN *plen_p, int num_code_blocks)
{
U8 *const src = (U8*)*pat_p;
- U8 *dst;
+ U8 *dst, *d;
int n=0;
- STRLEN s = 0, d = 0;
+ STRLEN s = 0;
bool do_end = 0;
GET_RE_DEBUG_FLAGS_DECL;
"UTF8 mismatch! Converting to utf8 for resizing and compile\n"));
Newx(dst, *plen_p * 2 + 1, U8);
+ d = dst;
while (s < *plen_p) {
- if (NATIVE_BYTE_IS_INVARIANT(src[s]))
- dst[d] = src[s];
- else {
- dst[d++] = UTF8_EIGHT_BIT_HI(src[s]);
- dst[d] = UTF8_EIGHT_BIT_LO(src[s]);
- }
+ append_utf8_from_native_byte(src[s], &d);
if (n < num_code_blocks) {
if (!do_end && pRExC_state->code_blocks[n].start == s) {
- pRExC_state->code_blocks[n].start = d;
- assert(dst[d] == '(');
+ pRExC_state->code_blocks[n].start = d - dst - 1;
+ assert(*(d - 1) == '(');
do_end = 1;
}
else if (do_end && pRExC_state->code_blocks[n].end == s) {
- pRExC_state->code_blocks[n].end = d;
- assert(dst[d] == ')');
+ pRExC_state->code_blocks[n].end = d - dst - 1;
+ assert(*(d - 1) == ')');
do_end = 0;
n++;
}
}
s++;
- d++;
}
- dst[d] = '\0';
- *plen_p = d;
+ *d = '\0';
+ *plen_p = d - dst;
*pat_p = (char*) dst;
SAVEFREEPV(*pat_p);
RExC_orig_utf8 = RExC_utf8 = 1;
ENTER;
SAVETMPS;
- save_re_context();
PUSHSTACKi(PERLSI_REQUIRE);
/* G_RE_REPARSING causes the toker to collapse \\ into \ when
* parsing qr''; normally only q'' does this. It also alters
reStudy:
r->minlen = minlen = sawlookahead = sawplus = sawopen = sawminmod = 0;
+ DEBUG_r(
+ RExC_study_chunk_recursed_count= 0;
+ );
Zero(r->substrs, 1, struct reg_substr_data);
if (RExC_study_chunk_recursed)
Zero(RExC_study_chunk_recursed,
else if (PL_regkind[OP(first)] == BOL) {
r->intflags |= (OP(first) == MBOL
? PREGf_ANCH_MBOL
- : (OP(first) == SBOL
- ? PREGf_ANCH_SBOL
- : PREGf_ANCH_BOL));
+ : PREGf_ANCH_SBOL);
first = NEXTOPER(first);
goto again;
}
if ((!(r->anchored_substr || r->anchored_utf8) || r->anchored_offset)
&& stclass_flag
&& ! (ANYOF_FLAGS(data.start_class) & SSC_MATCHES_EMPTY_STRING)
- && !ssc_is_anything(data.start_class))
+ && is_ssc_worth_it(pRExC_state, data.start_class))
{
const U32 n = add_data(pRExC_state, STR_WITH_LEN("f"));
= r->float_substr = r->float_utf8 = NULL;
if (! (ANYOF_FLAGS(data.start_class) & SSC_MATCHES_EMPTY_STRING)
- && ! ssc_is_anything(data.start_class))
+ && is_ssc_worth_it(pRExC_state, data.start_class))
{
const U32 n = add_data(pRExC_state, STR_WITH_LEN("f"));
if (PL_regkind[fop] == NOTHING && nop == END)
r->extflags |= RXf_NULL;
- else if (PL_regkind[fop] == BOL && nop == END)
+ else if ((fop == MBOL || (fop == SBOL && !first->flags)) && nop == END)
+ /* when fop is SBOL first->flags will be true only when it was
+ * produced by parsing /\A/, and not when parsing /^/. This is
+ * very important for the split code as there we want to
+ * treat /^/ as /^/m, but we do not want to treat /\A/ as /^/m.
+ * See rt #122761 for more details. -- Yves */
r->extflags |= RXf_START_ONLY;
else if (fop == PLUS
&& PL_regkind[nop] == POSIXD && FLAGS(next) == _CC_SPACE
}
Newxz(r->offs, RExC_npar, regexp_paren_pair);
/* assume we don't need to swap parens around before we match */
-
+ DEBUG_TEST_r({
+ PerlIO_printf(Perl_debug_log,"study_chunk_recursed_count: %lu\n",
+ (unsigned long)RExC_study_chunk_recursed_count);
+ });
DEBUG_DUMP_r({
DEBUG_RExC_seen();
PerlIO_printf(Perl_debug_log,"Final program:\n");
regex_charset cs;
bool has_use_defaults = FALSE;
const char* const seqstart = RExC_parse - 1; /* Point to the '?' */
+ int x_mod_count = 0;
PERL_ARGS_ASSERT_PARSE_LPAREN_QUESTION_FLAGS;
switch (*RExC_parse) {
/* Code for the imsx flags */
- CASE_STD_PMMOD_FLAGS_PARSE_SET(flagsp);
+ CASE_STD_PMMOD_FLAGS_PARSE_SET(flagsp, x_mod_count);
case LOCALE_PAT_MOD:
if (has_charset_modifier) {
if (RExC_flags & RXf_PMf_FOLD) {
RExC_contains_i = 1;
}
+ if (PASS2) {
+ STD_PMMOD_FLAGS_PARSE_X_WARN(x_mod_count);
+ }
return;
/*NOTREACHED*/
default:
++RExC_parse;
}
+
+ if (PASS2) {
+ STD_PMMOD_FLAGS_PARSE_X_WARN(x_mod_count);
+ }
}
/*
num = RExC_npar + num - 1;
}
- ret = reganode(pRExC_state, GOSUB, num);
+ ret = reg2Lanode(pRExC_state, GOSUB, num, RExC_recurse_count);
if (!SIZE_ONLY) {
if (num > (I32)RExC_rx->nparens) {
RExC_parse++;
vFAIL("Reference to nonexistent group");
}
- ARG2L_SET( ret, RExC_recurse_count++);
- RExC_emit++;
+ RExC_recurse_count++;
DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
"Recurse #%"UVuf" to %"IVdf"\n",
(UV)ARG(ret), (IV)ARG2L(ret)));
- } else {
- RExC_size++;
- }
- RExC_seen |= REG_RECURSE_SEEN;
+ }
+ RExC_seen |= REG_RECURSE_SEEN;
Set_Node_Length(ret, 1 + regarglen[OP(ret)]); /* MJD */
Set_Node_Offset(ret, parse_start); /* MJD */
if (is_logical) {
regnode *eval;
ret = reg_node(pRExC_state, LOGICAL);
- eval = reganode(pRExC_state, EVAL, n);
+
+ eval = reg2Lanode(pRExC_state, EVAL,
+ n,
+
+ /* for later propagation into (??{})
+ * return value */
+ RExC_flags & RXf_PMf_COMPILETIME
+ );
if (!SIZE_ONLY) {
ret->flags = 2;
- /* for later propagation into (??{}) return value */
- eval->flags = (U8) (RExC_flags & RXf_PMf_COMPILETIME);
}
REGTAIL(pRExC_state, ret, eval);
/* deal with the length of this later - MJD */
return ret;
}
- ret = reganode(pRExC_state, EVAL, n);
+ ret = reg2Lanode(pRExC_state, EVAL, n, 0);
Set_Node_Length(ret, RExC_parse - parse_start + 1);
Set_Node_Offset(ret, parse_start);
return ret;
case '(': /* (?(?{...})...) and (?(?=...)...) */
{
int is_define= 0;
+ const int DEFINE_len = sizeof("DEFINE") - 1;
if (RExC_parse[0] == '?') { /* (?(?...)) */
if (RExC_parse[1] == '=' || RExC_parse[1] == '!'
|| RExC_parse[1] == '<'
ret = reganode(pRExC_state,NGROUPP,num);
goto insert_if_check_paren;
}
- else if (RExC_parse[0] == 'D' &&
- RExC_parse[1] == 'E' &&
- RExC_parse[2] == 'F' &&
- RExC_parse[3] == 'I' &&
- RExC_parse[4] == 'N' &&
- RExC_parse[5] == 'E')
- {
+ else if (strnEQ(RExC_parse, "DEFINE",
+ MIN(DEFINE_len, RExC_end - RExC_parse)))
+ {
ret = reganode(pRExC_state,DEFINEP,0);
- RExC_parse +=6 ;
+ RExC_parse += DEFINE_len;
is_define = 1;
goto insert_if_check_paren;
}
}
else
lastbr = NULL;
- if (c != ')')
- vFAIL("Switch (?(condition)... contains too many branches");
+ if (c != ')') {
+ if (RExC_parse>RExC_end)
+ vFAIL("Switch (?(condition)... not terminated");
+ else
+ vFAIL("Switch (?(condition)... contains too many branches");
+ }
ender = reg_node(pRExC_state, TAIL);
REGTAIL(pRExC_state, br, ender);
if (lastbr) {
return(ret);
}
-STATIC bool
+STATIC STRLEN
S_grok_bslash_N(pTHX_ RExC_state_t *pRExC_state, regnode** node_p,
- UV *valuep, I32 *flagp, U32 depth, bool in_char_class,
- const bool strict /* Apply stricter parsing rules? */
+ UV *valuep, I32 *flagp, U32 depth, SV** substitute_parse
)
{
and needs to handle the rest. RExC_parse is expected to point at the first
char following the N at the time of the call. On successful return,
RExC_parse has been updated to point to just after the sequence identified
- by this routine, and <*flagp> has been updated.
-
- The \N may be inside (indicated by the boolean <in_char_class>) or outside a
- character class.
-
- \N may begin either a named sequence, or if outside a character class, mean
- to match a non-newline. For non single-quoted regexes, the tokenizer has
- attempted to decide which, and in the case of a named sequence, converted it
+ by this routine, <*flagp> has been updated, and the non-NULL input pointers
+ have been set appropriately.
+
+ The typical case for this is \N{some character name}. This is usually
+ called while parsing the input, filling in or ready to fill in an EXACTish
+ node, and the code point for the character should be returned, so that it
+ can be added to the node, and parsing continued with the next input
+ character. But it may be that instead of a single character the \N{}
+ expands to more than one, a named sequence. In this case any following
+ quantifier applies to the whole sequence, and it is easier, given the code
+ structure that calls this, to handle it from a different area of the code.
+ For this reason, the input parameters can be set so that it returns valid
+ only on one or the other of these cases.
+
+ Another possibility is for the input to be an empty \N{}, which for
+ backwards compatibility we accept, but generate a NOTHING node which should
+ later get optimized out. This is handled from the area of code which can
+ handle a named sequence, so if called with the parameters for the other, it
+ fails.
+
+ Still another possibility is for the \N to mean [^\n], and not a single
+ character or explicit sequence at all. This is determined by context.
+ Again, this is handled from the area of code which can handle a named
+ sequence, so if called with the parameters for the other, it also fails.
+
+ And the final possibility is for the \N to be called from within a bracketed
+ character class. In this case the [^\n] meaning makes no sense, and so is
+ an error. Other anomalous situations are left to the calling code to handle.
+
+ For non-single-quoted regexes, the tokenizer has attempted to decide which
+ of the above applies, and in the case of a named sequence, has converted it
into one of the forms: \N{} (if the sequence is null), or \N{U+c1.c2...},
where c1... are the characters in the sequence. For single-quoted regexes,
the tokenizer passes the \N sequence through unchanged; this code will not
attempt to determine this nor expand those, instead raising a syntax error.
The net effect is that if the beginning of the passed-in pattern isn't '{U+'
or there is no '}', it signals that this \N occurrence means to match a
- non-newline.
+ non-newline. (This mostly was done because of [perl #56444].)
- Only the \N{U+...} form should occur in a character class, for the same
- reason that '.' inside a character class means to just match a period: it
- just doesn't make sense.
+ The API is somewhat convoluted due to historical and the above reasons.
The function raises an error (via vFAIL), and doesn't return for various
- syntax errors. Otherwise it returns TRUE and sets <node_p> or <valuep> on
- success; it returns FALSE otherwise. Returns FALSE, setting *flagp to
- RESTART_UTF8 if the sizing scan needs to be restarted. Such a restart is
- only possible if node_p is non-NULL.
-
+ syntax errors. For other failures, it returns (STRLEN) -1. For successes,
+ it returns a count of how many characters were accounted for by it. (This
+ can be 0 for \N{}; 1 for it meaning [^\n]; and otherwise the number of code
+ points in the sequence. It sets <node_p>, <valuep>, and/or
+ <substitute_parse> on success.
If <valuep> is non-null, it means the caller can accept an input sequence
- consisting of a just a single code point; <*valuep> is set to that value
- if the input is such.
-
- If <node_p> is non-null it signifies that the caller can accept any other
- legal sequence (i.e., one that isn't just a single code point). <*node_p>
- is set as follows:
- 1) \N means not-a-NL: points to a newly created REG_ANY node;
- 2) \N{}: points to a new NOTHING node;
+ consisting of a just a single code point; <*valuep> is set to the value
+ of the only or first code point in the input.
+
+ If <substitute_parse> is non-null, it means the caller can accept an input
+ sequence consisting of one or more code points; <*substitute_parse> is a
+ newly created mortal SV* in this case, containing \x{} escapes representing
+ those code points.
+
+ Both <valuep> and <substitute_parse> can be non-NULL.
+
+ If <node_p> is non-null, <substitute_parse> must be NULL. This signifies
+ that the caller can accept any legal sequence other than a single code
+ point. To wit, <*node_p> is set as follows:
+ 1) \N means not-a-NL: points to a newly created REG_ANY node; return is 1
+ 2) \N{}: points to a new NOTHING node; return is 0
3) otherwise: points to a new EXACT node containing the resolved
- string.
- Note that FALSE is returned for single code point sequences if <valuep> is
- null.
+ string; return is the number of code points in the
+ string. This will never be 1.
+ Note that failure is returned for single code point sequences if <valuep> is
+ null and <node_p> is not.
*/
char * endbrace; /* '}' following the name */
stream */
bool has_multiple_chars; /* true if the input stream contains a sequence of
more than one character */
+ bool in_char_class = substitute_parse != NULL;
+ STRLEN count = 0; /* Number of characters in this sequence */
GET_RE_DEBUG_FLAGS_DECL;
GET_RE_DEBUG_FLAGS;
assert(cBOOL(node_p) ^ cBOOL(valuep)); /* Exactly one should be set */
+ assert(! (node_p && substitute_parse)); /* At most 1 should be set */
/* The [^\n] meaning of \N ignores spaces and comments under the /x
* modifier. The other meaning does not, so use a temporary until we find
if (in_char_class) {
vFAIL("\\N in a character class must be a named character: \\N{...}");
}
- return FALSE;
+ return (STRLEN) -1;
}
RExC_parse--; /* Need to back off so nextchar() doesn't skip the
current char */
*flagp |= HASWIDTH|SIMPLE;
RExC_naughty++;
Set_Node_Length(*node_p, 1); /* MJD */
- return TRUE;
+ return 1;
}
/* Here, we have decided it should be a named character or sequence */
}
if (endbrace == RExC_parse) { /* empty: \N{} */
- bool ret = TRUE;
if (node_p) {
*node_p = reg_node(pRExC_state,NOTHING);
}
- else if (in_char_class) {
- if (PASS2 && in_char_class) {
- if (strict) {
- RExC_parse++; /* Position after the "}" */
- vFAIL("Zero length \\N{}");
- }
- else {
- ckWARNreg(RExC_parse,
- "Ignoring zero length \\N{} in character class");
- }
- }
- ret = FALSE;
- }
- else {
- return FALSE;
+ else if (! in_char_class) {
+ return (STRLEN) -1;
}
nextchar(pRExC_state);
- return ret;
+ return 0;
}
RExC_uni_semantics = 1; /* Unicode named chars imply Unicode semantics */
* point, and is terminated by the brace */
has_multiple_chars = (endchar < endbrace);
- if (valuep && (! has_multiple_chars || in_char_class)) {
- /* We only pay attention to the first char of
- multichar strings being returned in char classes. I kinda wonder
- if this makes sense as it does change the behaviour
- from earlier versions, OTOH that behaviour was broken
- as well. XXX Solution is to recharacterize as
- [rest-of-class]|multi1|multi2... */
-
+ /* We get the first code point if we want it, and either there is only one,
+ * or we can accept both cases of one and more than one */
+ if (valuep && (substitute_parse || ! has_multiple_chars)) {
STRLEN length_of_hex = (STRLEN)(endchar - RExC_parse);
I32 grok_hex_flags = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX
- | (SIZE_ONLY ? PERL_SCAN_SILENT_ILLDIGIT : 0);
+ | PERL_SCAN_DISALLOW_PREFIX
+
+ /* No errors in the first pass (See [perl
+ * #122671].) We let the code below find the
+ * errors when there are multiple chars. */
+ | ((SIZE_ONLY || has_multiple_chars)
+ ? PERL_SCAN_SILENT_ILLDIGIT
+ : 0);
*valuep = grok_hex(RExC_parse, &length_of_hex, &grok_hex_flags, NULL);
/* The tokenizer should have guaranteed validity, but it's possible to
- * bypass it by using single quoting, so check */
- if (length_of_hex == 0
- || length_of_hex != (STRLEN)(endchar - RExC_parse) )
- {
- RExC_parse += length_of_hex; /* Includes all the valid */
- RExC_parse += (RExC_orig_utf8) /* point to after 1st invalid */
- ? UTF8SKIP(RExC_parse)
- : 1;
- /* Guard against malformed utf8 */
- if (RExC_parse >= endchar) {
- RExC_parse = endchar;
+ * bypass it by using single quoting, so check. Don't do the check
+ * here when there are multiple chars; we do it below anyway. */
+ if (! has_multiple_chars) {
+ if (length_of_hex == 0
+ || length_of_hex != (STRLEN)(endchar - RExC_parse) )
+ {
+ RExC_parse += length_of_hex; /* Includes all the valid */
+ RExC_parse += (RExC_orig_utf8) /* point to after 1st invalid */
+ ? UTF8SKIP(RExC_parse)
+ : 1;
+ /* Guard against malformed utf8 */
+ if (RExC_parse >= endchar) {
+ RExC_parse = endchar;
+ }
+ vFAIL("Invalid hexadecimal number in \\N{U+...}");
}
- vFAIL("Invalid hexadecimal number in \\N{U+...}");
- }
- if (in_char_class && has_multiple_chars) {
- if (strict) {
- RExC_parse = endbrace;
- vFAIL("\\N{} in character class restricted to one character");
- }
- else if (PASS2) {
- ckWARNreg(endchar, "Using just the first character returned by \\N{} in character class");
- }
+ RExC_parse = endbrace + 1;
+ return 1;
}
-
- RExC_parse = endbrace + 1;
}
- else if (! node_p || ! has_multiple_chars) {
- /* Here, the input is legal, but not according to the caller's
- * options. We fail without advancing the parse, so that the
- * caller can try again */
+ /* Here, we should have already handled the case where a single character
+ * is expected and found. So it is a failure if we aren't expecting
+ * multiple chars and got them; or didn't get them but wanted them. We
+ * fail without advancing the parse, so that the caller can try again with
+ * different acceptance criteria */
+ if ((! node_p && ! substitute_parse) || ! has_multiple_chars) {
RExC_parse = p;
- return FALSE;
+ return (STRLEN) -1;
}
- else {
+
+ {
/* What is done here is to convert this to a sub-pattern of the form
- * (?:\x{char1}\x{char2}...)
- * and then call reg recursively. That way, it retains its atomicness,
- * while not having to worry about special handling that some code
- * points may have. toke.c has converted the original Unicode values
- * to native, so that we can just pass on the hex values unchanged. We
- * do have to set a flag to keep recoding from happening in the
- * recursion */
-
- SV * substitute_parse = newSVpvn_flags("?:", 2, SVf_UTF8|SVs_TEMP);
+ * \x{char1}\x{char2}...
+ * and then either return it in <*substitute_parse> if non-null; or
+ * call reg recursively to parse it (enclosing in "(?: ... )" ). That
+ * way, it retains its atomicness, while not having to worry about
+ * special handling that some code points may have. toke.c has
+ * converted the original Unicode values to native, so that we can just
+ * pass on the hex values unchanged. We do have to set a flag to keep
+ * recoding from happening in the recursion */
+
+ SV * dummy = NULL;
STRLEN len;
char *orig_end = RExC_end;
I32 flags;
+ if (substitute_parse) {
+ *substitute_parse = newSVpvs("");
+ }
+ else {
+ substitute_parse = &dummy;
+ *substitute_parse = newSVpvs("?:");
+ }
+ *substitute_parse = sv_2mortal(*substitute_parse);
+
while (RExC_parse < endbrace) {
/* Convert to notation the rest of the code understands */
- sv_catpv(substitute_parse, "\\x{");
- sv_catpvn(substitute_parse, RExC_parse, endchar - RExC_parse);
- sv_catpv(substitute_parse, "}");
+ sv_catpv(*substitute_parse, "\\x{");
+ sv_catpvn(*substitute_parse, RExC_parse, endchar - RExC_parse);
+ sv_catpv(*substitute_parse, "}");
/* Point to the beginning of the next character in the sequence. */
RExC_parse = endchar + 1;
endchar = RExC_parse + strcspn(RExC_parse, ".}");
+
+ count++;
}
- sv_catpv(substitute_parse, ")");
+ if (! in_char_class) {
+ sv_catpv(*substitute_parse, ")");
+ }
- RExC_parse = SvPV(substitute_parse, len);
+ RExC_parse = SvPV(*substitute_parse, len);
/* Don't allow empty number */
- if (len < 8) {
+ if (len < (STRLEN) ((substitute_parse) ? 6 : 8)) {
+ RExC_parse = endbrace;
vFAIL("Invalid hexadecimal number in \\N{U+...}");
}
RExC_end = RExC_parse + len;
/* The values are Unicode, and therefore not subject to recoding */
RExC_override_recoding = 1;
- if (!(*node_p = reg(pRExC_state, 1, &flags, depth+1))) {
- if (flags & RESTART_UTF8) {
- *flagp = RESTART_UTF8;
- return FALSE;
+ if (node_p) {
+ if (!(*node_p = reg(pRExC_state, 1, &flags, depth+1))) {
+ if (flags & RESTART_UTF8) {
+ *flagp = RESTART_UTF8;
+ return (STRLEN) -1;
+ }
+ FAIL2("panic: reg returned NULL to grok_bslash_N, flags=%#"UVxf"",
+ (UV) flags);
}
- FAIL2("panic: reg returned NULL to grok_bslash_N, flags=%#"UVxf"",
- (UV) flags);
+ *flagp |= flags&(HASWIDTH|SPSTART|SIMPLE|POSTPONED);
}
- *flagp |= flags&(HASWIDTH|SPSTART|SIMPLE|POSTPONED);
RExC_parse = endbrace;
RExC_end = orig_end;
nextchar(pRExC_state);
}
- return TRUE;
+ return count;
}
if (LOC || ! FOLD) { /* /l defers folding until runtime */
*character = (U8) code_point;
}
- else { /* Here is /i and not /l (toFOLD() is defined on just
+ else { /* Here is /i and not /l. (toFOLD() is defined on just
ASCII, which isn't the same thing as INVARIANT on
EBCDIC, but it works there, as the extra invariants
fold to themselves) */
? FOLD_FLAGS_NOMIX_ASCII
: 0));
if (downgradable
- && folded == code_point
+ && folded == code_point /* This quickly rules out many
+ cases, avoiding the
+ _invlist_contains_cp() overhead
+ for those. */
&& ! _invlist_contains_cp(PL_utf8_foldable, code_point))
{
OP(node) = EXACT;
nextchar(pRExC_state);
if (RExC_flags & RXf_PMf_MULTILINE)
ret = reg_node(pRExC_state, MBOL);
- else if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SBOL);
else
- ret = reg_node(pRExC_state, BOL);
+ ret = reg_node(pRExC_state, SBOL);
Set_Node_Length(ret, 1); /* MJD */
break;
case '$':
RExC_seen_zerolen++;
if (RExC_flags & RXf_PMf_MULTILINE)
ret = reg_node(pRExC_state, MEOL);
- else if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SEOL);
else
- ret = reg_node(pRExC_state, EOL);
+ ret = reg_node(pRExC_state, SEOL);
Set_Node_Length(ret, 1); /* MJD */
break;
case '.':
case 'A':
RExC_seen_zerolen++;
ret = reg_node(pRExC_state, SBOL);
+ /* SBOL is shared with /^/ so we set the flags so we can tell
+ * /\A/ from /^/ in split. We check ret because first pass we
+ * have no regop struct to set the flags on. */
+ if (PASS2)
+ ret->flags = 1;
*flagp |= SIMPLE;
goto finish_meta_pat;
case 'G':
ret = reg_node(pRExC_state, op);
FLAGS(ret) = get_regex_charset(RExC_flags);
*flagp |= SIMPLE;
- if (! SIZE_ONLY && (U8) *(RExC_parse + 1) == '{') {
+ if ((U8) *(RExC_parse + 1) == '{') {
/* diag_listed_as: Use "%s" instead of "%s" */
vFAIL("Use \"\\b\\{\" instead of \"\\b{\"");
}
ret = reg_node(pRExC_state, op);
FLAGS(ret) = get_regex_charset(RExC_flags);
*flagp |= SIMPLE;
- if (! SIZE_ONLY && (U8) *(RExC_parse + 1) == '{') {
+ if ((U8) *(RExC_parse + 1) == '{') {
/* diag_listed_as: Use "%s" instead of "%s" */
vFAIL("Use \"\\B\\{\" instead of \"\\B{\"");
}
* special treatment for quantifiers is not needed for such single
* character sequences */
++RExC_parse;
- if (! grok_bslash_N(pRExC_state, &ret, NULL, flagp, depth, FALSE,
- FALSE /* not strict */ )) {
+ if ((STRLEN) -1 == grok_bslash_N(pRExC_state, &ret, NULL, flagp,
+ depth, FALSE))
+ {
if (*flagp & RESTART_UTF8)
return NULL;
RExC_parse--;
* point sequence. Handle those in the switch() above
* */
RExC_parse = p + 1;
- if (! grok_bslash_N(pRExC_state, NULL, &ender,
- flagp, depth, FALSE,
- FALSE /* not strict */ ))
- {
+ if ((STRLEN) -1 == grok_bslash_N(pRExC_state, NULL,
+ &ender,
+ flagp,
+ depth,
+ FALSE
+ )) {
if (*flagp & RESTART_UTF8)
FAIL("panic: grok_bslash_N set RESTART_UTF8");
RExC_parse = p = oldp;
}
}
+STATIC AV *
+S_add_multi_match(pTHX_ AV* multi_char_matches, SV* multi_string, const STRLEN cp_count)
+{
+ /* This adds the string scalar <multi_string> to the array
+ * <multi_char_matches>. <multi_string> is known to have exactly
+ * <cp_count> code points in it. This is used when constructing a
+ * bracketed character class and we find something that needs to match more
+ * than a single character.
+ *
+ * <multi_char_matches> is actually an array of arrays. Each top-level
+ * element is an array that contains all the strings known so far that are
+ * the same length. And that length (in number of code points) is the same
+ * as the index of the top-level array. Hence, the [2] element is an
+ * array, each element thereof is a string containing TWO code points;
+ * while element [3] is for strings of THREE characters, and so on. Since
+ * this is for multi-char strings there can never be a [0] nor [1] element.
+ *
+ * When we rewrite the character class below, we will do so such that the
+ * longest strings are written first, so that it prefers the longest
+ * matching strings first. This is done even if it turns out that any
+ * quantifier is non-greedy, out of this programmer's (khw) laziness. Tom
+ * Christiansen has agreed that this is ok. This makes the test for the
+ * ligature 'ffi' come before the test for 'ff', for example */
+
+ AV* this_array;
+ AV** this_array_ptr;
+
+ PERL_ARGS_ASSERT_ADD_MULTI_MATCH;
+
+ if (! multi_char_matches) {
+ multi_char_matches = newAV();
+ }
+
+ if (av_exists(multi_char_matches, cp_count)) {
+ this_array_ptr = (AV**) av_fetch(multi_char_matches, cp_count, FALSE);
+ this_array = *this_array_ptr;
+ }
+ else {
+ this_array = newAV();
+ av_store(multi_char_matches, cp_count,
+ (SV*) this_array);
+ }
+ av_push(this_array, multi_string);
+
+ return multi_char_matches;
+}
+
/* The names of properties whose definitions are not known at compile time are
* stored in this SV, after a constant heading. So if the length has been
* changed since initialization, then there is a run-time definition. */
if (UCHARAT(RExC_parse) == ']')
goto charclassloop;
-parseit:
while (1) {
if (RExC_parse >= stop_ptr) {
break;
}
else {
/* Is a backslash; get the code point of the char after it */
- if (UTF && ! UTF8_IS_INVARIANT(RExC_parse)) {
+ if (UTF && ! UTF8_IS_INVARIANT(UCHARAT(RExC_parse))) {
value = utf8n_to_uvchr((U8*)RExC_parse,
RExC_end - RExC_parse,
&numlen, UTF8_ALLOW_DEFAULT);
case 'H': namedclass = ANYOF_NHORIZWS; break;
case 'N': /* Handle \N{NAME} in class */
{
- /* We only pay attention to the first char of
- multichar strings being returned. I kinda wonder
- if this makes sense as it does change the behaviour
- from earlier versions, OTOH that behaviour was broken
- as well. */
- if (! grok_bslash_N(pRExC_state, NULL, &value, flagp, depth,
- TRUE, /* => charclass */
- strict))
- {
- if (*flagp & RESTART_UTF8)
- FAIL("panic: grok_bslash_N set RESTART_UTF8");
- goto parseit;
+ SV *as_text;
+ STRLEN cp_count = grok_bslash_N(pRExC_state, NULL, &value,
+ flagp, depth, &as_text);
+ if (*flagp & RESTART_UTF8)
+ FAIL("panic: grok_bslash_N set RESTART_UTF8");
+ if (cp_count != 1) { /* The typical case drops through */
+ assert(cp_count != (STRLEN) -1);
+ if (cp_count == 0) {
+ if (strict) {
+ RExC_parse++; /* Position after the "}" */
+ vFAIL("Zero length \\N{}");
+ }
+ else if (PASS2) {
+ ckWARNreg(RExC_parse,
+ "Ignoring zero length \\N{} in character class");
+ }
+ }
+ else { /* cp_count > 1 */
+ if (! RExC_in_multi_char_class) {
+ if (invert || range || *RExC_parse == '-') {
+ if (strict) {
+ RExC_parse--;
+ vFAIL("\\N{} in inverted character class or as a range end-point is restricted to one character");
+ }
+ else if (PASS2) {
+ ckWARNreg(RExC_parse, "Using just the first character returned by \\N{} in character class");
+ }
+ }
+ else {
+ multi_char_matches
+ = add_multi_match(multi_char_matches,
+ as_text,
+ cp_count);
+ }
+ break; /* <value> contains the first code
+ point. Drop out of the switch to
+ process it */
+ }
+ } /* End of cp_count != 1 */
+
+ /* This element should not be processed further in this
+ * class */
+ element_count--;
+ value = save_value;
+ prevvalue = save_prevvalue;
+ continue; /* Back to top of loop to get next char */
}
+ /* Here, is a single code point, and <value> contains it */
+#ifdef EBCDIC
+ /* We consider named characters to be literal characters */
+ literal_endpoint++;
+#endif
}
break;
case 'p':
* again. Otherwise add this character to the list of
* multi-char folds. */
if (! RExC_in_multi_char_class) {
- AV** this_array_ptr;
- AV* this_array;
STRLEN cp_count = utf8_length(foldbuf,
foldbuf + foldlen);
SV* multi_fold = sv_2mortal(newSVpvs(""));
Perl_sv_catpvf(aTHX_ multi_fold, "\\x{%"UVXf"}", value);
+ multi_char_matches
+ = add_multi_match(multi_char_matches,
+ multi_fold,
+ cp_count);
- if (! multi_char_matches) {
- multi_char_matches = newAV();
- }
-
- /* <multi_char_matches> is actually an array of arrays.
- * There will be one or two top-level elements: [2],
- * and/or [3]. The [2] element is an array, each
- * element thereof is a character which folds to TWO
- * characters; [3] is for folds to THREE characters.
- * (Unicode guarantees a maximum of 3 characters in any
- * fold.) When we rewrite the character class below,
- * we will do so such that the longest folds are
- * written first, so that it prefers the longest
- * matching strings first. This is done even if it
- * turns out that any quantifier is non-greedy, out of
- * programmer laziness. Tom Christiansen has agreed
- * that this is ok. This makes the test for the
- * ligature 'ffi' come before the test for 'ff' */
- if (av_exists(multi_char_matches, cp_count)) {
- this_array_ptr = (AV**) av_fetch(multi_char_matches,
- cp_count, FALSE);
- this_array = *this_array_ptr;
- }
- else {
- this_array = newAV();
- av_store(multi_char_matches, cp_count,
- (SV*) this_array);
- }
- av_push(this_array, multi_fold);
}
/* This element should not be processed further in this
* included. literal_endpoint==2 means both ends of the range used
* a literal character, not \x{foo} */
if (literal_endpoint == 2
- && ((prevvalue >= 'a' && value <= 'z')
- || (prevvalue >= 'A' && value <= 'Z')))
+ && ((isLOWER_A(prevvalue) && isLOWER_A(value))
+ || (isUPPER_A(prevvalue) && isUPPER_A(value))))
{
_invlist_intersection(this_range, PL_XPosix_ptrs[_CC_ASCII],
&this_range);
- /* Since this above only contains ascii, the intersection of it
- * with anything will still yield only ascii */
+ /* Since 'this_range' now only contains ascii, the intersection
+ * of it with anything will still yield only ascii */
_invlist_intersection(this_range, PL_XPosix_ptrs[_CC_ALPHA],
&this_range);
}
_invlist_union(cp_foldable_list, this_range, &cp_foldable_list);
literal_endpoint = 0;
+ SvREFCNT_dec_NN(this_range);
#endif
}
RExC_parse = SvPV(substitute_parse, len);
RExC_end = RExC_parse + len;
RExC_in_multi_char_class = 1;
+ RExC_override_recoding = 1;
RExC_emit = (regnode *)orig_emit;
ret = reg(pRExC_state, 1, ®_flags, depth+1);
RExC_parse = save_parse;
RExC_end = save_end;
RExC_in_multi_char_class = 0;
+ RExC_override_recoding = 0;
SvREFCNT_dec_NN(multi_char_matches);
return ret;
}
}
}
-/*
-- reg_node - emit a node
-*/
-STATIC regnode * /* Location. */
-S_reg_node(pTHX_ RExC_state_t *pRExC_state, U8 op)
+STATIC regnode *
+S_regnode_guts(pTHX_ RExC_state_t *pRExC_state, const U8 op, const STRLEN extra_size, const char* const name)
{
- regnode *ptr;
+ /* Allocate a regnode for 'op' and returns it, with 'extra_size' extra
+ * space. In pass1, it aligns and increments RExC_size; in pass2,
+ * RExC_emit */
+
regnode * const ret = RExC_emit;
GET_RE_DEBUG_FLAGS_DECL;
- PERL_ARGS_ASSERT_REG_NODE;
+ PERL_ARGS_ASSERT_REGNODE_GUTS;
+
+ assert(extra_size >= regarglen[op]);
if (SIZE_ONLY) {
SIZE_ALIGN(RExC_size);
- RExC_size += 1;
+ RExC_size += 1 + extra_size;
return(ret);
}
if (RExC_emit >= RExC_emit_bound)
op, (void*)RExC_emit, (void*)RExC_emit_bound);
NODE_ALIGN_FILL(ret);
- ptr = ret;
- FILL_ADVANCE_NODE(ptr, op);
-#ifdef RE_TRACK_PATTERN_OFFSETS
+#ifndef RE_TRACK_PATTERN_OFFSETS
+ PERL_UNUSED_ARG(name);
+#else
if (RExC_offsets) { /* MJD */
MJD_OFFSET_DEBUG(
("%s:%d: (op %s) %s %"UVuf" (len %"UVuf") (max %"UVuf").\n",
- "reg_node", __LINE__,
+ name, __LINE__,
PL_reg_name[op],
(UV)(RExC_emit - RExC_emit_start) > RExC_offsets[0]
? "Overwriting end of array!\n" : "OK",
Set_Node_Offset(RExC_emit, RExC_parse + (op == END));
}
#endif
- RExC_emit = ptr;
+ return(ret);
+}
+
+/*
+- reg_node - emit a node
+*/
+STATIC regnode * /* Location. */
+S_reg_node(pTHX_ RExC_state_t *pRExC_state, U8 op)
+{
+ regnode * const ret = regnode_guts(pRExC_state, op, regarglen[op], "reg_node");
+
+ PERL_ARGS_ASSERT_REG_NODE;
+
+ assert(regarglen[op] == 0);
+
+ if (PASS2) {
+ regnode *ptr = ret;
+ FILL_ADVANCE_NODE(ptr, op);
+ RExC_emit = ptr;
+ }
return(ret);
}
STATIC regnode * /* Location. */
S_reganode(pTHX_ RExC_state_t *pRExC_state, U8 op, U32 arg)
{
- regnode *ptr;
- regnode * const ret = RExC_emit;
- GET_RE_DEBUG_FLAGS_DECL;
+ regnode * const ret = regnode_guts(pRExC_state, op, regarglen[op], "reganode");
PERL_ARGS_ASSERT_REGANODE;
- if (SIZE_ONLY) {
- SIZE_ALIGN(RExC_size);
- RExC_size += 2;
- /*
- We can't do this:
+ assert(regarglen[op] == 1);
- assert(2==regarglen[op]+1);
+ if (PASS2) {
+ regnode *ptr = ret;
+ FILL_ADVANCE_NODE_ARG(ptr, op, arg);
+ RExC_emit = ptr;
+ }
+ return(ret);
+}
- Anything larger than this has to allocate the extra amount.
- If we changed this to be:
+STATIC regnode *
+S_reg2Lanode(pTHX_ RExC_state_t *pRExC_state, const U8 op, const U32 arg1, const I32 arg2)
+{
+ /* emit a node with U32 and I32 arguments */
- RExC_size += (1 + regarglen[op]);
+ regnode * const ret = regnode_guts(pRExC_state, op, regarglen[op], "reg2Lanode");
- then it wouldn't matter. Its not clear what side effect
- might come from that so its not done so far.
- -- dmq
- */
- return(ret);
- }
- if (RExC_emit >= RExC_emit_bound)
- Perl_croak(aTHX_ "panic: reg_node overrun trying to emit %d, %p>=%p",
- op, (void*)RExC_emit, (void*)RExC_emit_bound);
+ PERL_ARGS_ASSERT_REG2LANODE;
- NODE_ALIGN_FILL(ret);
- ptr = ret;
- FILL_ADVANCE_NODE_ARG(ptr, op, arg);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD */
- MJD_OFFSET_DEBUG(
- ("%s(%d): (op %s) %s %"UVuf" <- %"UVuf" (max %"UVuf").\n",
- "reganode",
- __LINE__,
- PL_reg_name[op],
- (UV)(RExC_emit - RExC_emit_start) > RExC_offsets[0] ?
- "Overwriting end of array!\n" : "OK",
- (UV)(RExC_emit - RExC_emit_start),
- (UV)(RExC_parse - RExC_start),
- (UV)RExC_offsets[0]));
- Set_Cur_Node_Offset;
+ assert(regarglen[op] == 2);
+
+ if (PASS2) {
+ regnode *ptr = ret;
+ FILL_ADVANCE_NODE_2L_ARG(ptr, op, arg1, arg2);
+ RExC_emit = ptr;
}
-#endif
- RExC_emit = ptr;
return(ret);
}
}
if (r->intflags & PREGf_ANCH) {
PerlIO_printf(Perl_debug_log, "anchored");
- if (r->intflags & PREGf_ANCH_BOL)
- PerlIO_printf(Perl_debug_log, "(BOL)");
if (r->intflags & PREGf_ANCH_MBOL)
PerlIO_printf(Perl_debug_log, "(MBOL)");
if (r->intflags & PREGf_ANCH_SBOL)
}
else if (k == BRANCHJ && (OP(o) == UNLESSM || OP(o) == IFMATCH))
Perl_sv_catpvf(aTHX_ sv, "[%d]", -(o->flags));
+ else if (OP(o) == SBOL)
+ Perl_sv_catpvf(aTHX_ sv, " /%s/", o->flags ? "\\A" : "^");
#else
PERL_UNUSED_CONTEXT;
PERL_UNUSED_ARG(sv);
Perl_croak(aTHX_ "%"UTF8f, UTF8fARG(utf8, l1-1, buf));
}
-/* XXX Here's a total kludge. But we need to re-enter for swash routines. */
-
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_save_re_context(pTHX)
-{
- /* Save $1..$n (#18107: UTF-8 s/(\w+)/uc($1)/e); AMS 20021106. */
- if (PL_curpm) {
- const REGEXP * const rx = PM_GETRE(PL_curpm);
- if (rx) {
- U32 i;
- for (i = 1; i <= RX_NPARENS(rx); i++) {
- char digits[TYPE_CHARS(long)];
- const STRLEN len = my_snprintf(digits, sizeof(digits),
- "%lu", (long)i);
- GV *const *const gvp
- = (GV**)hv_fetch(PL_defstash, digits, len, 0);
-
- if (gvp) {
- GV * const gv = *gvp;
- if (SvTYPE(gv) == SVt_PVGV && GvSV(gv))
- save_scalar(gv);
- }
- }
- }
- }
-}
-#endif
-
#ifdef DEBUGGING
/* Certain characters are output as a sequence with the first being a
* backslash. */
#define MAX_PRINT_A MAX_PRINT_A_FOR_USE_ONLY_BY_REGCOMP_DOT_C
-#ifndef MIN
-#define MIN(a,b) ((a) < (b) ? (a) : (b))
-#endif
-
STATIC void
S_put_range(pTHX_ SV *sv, UV start, const UV end, const bool allow_literals)
{
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