I32 sawback; /* Did we see \1, ...? */
U32 seen;
I32 size; /* Code size. */
- I32 npar; /* () count. */
+ I32 npar; /* Capture buffer count, (OPEN). */
+ I32 cpar; /* Capture buffer count, (CLOSE). */
+ I32 nestroot; /* root parens we are in - used by accept */
I32 extralen;
I32 seen_zerolen;
I32 seen_evals;
#define RExC_seen (pRExC_state->seen)
#define RExC_size (pRExC_state->size)
#define RExC_npar (pRExC_state->npar)
+#define RExC_cpar (pRExC_state->cpar)
+#define RExC_nestroot (pRExC_state->nestroot)
#define RExC_extralen (pRExC_state->extralen)
#define RExC_seen_zerolen (pRExC_state->seen_zerolen)
#define RExC_seen_evals (pRExC_state->seen_evals)
#define SCF_WHILEM_VISITED_POS 0x2000
#define SCF_TRIE_RESTUDY 0x4000 /* Do restudy? */
-
+#define SCF_SEEN_ACCEPT 0x8000
#define UTF (RExC_utf8 != 0)
#define LOC ((RExC_flags & PMf_LOCALE) != 0)
#define Set_Node_Offset_To_R(node,byte) STMT_START { \
if (! SIZE_ONLY) { \
MJD_OFFSET_DEBUG(("** (%d) offset of node %d is %d.\n", \
- __LINE__, (node), (int)(byte))); \
+ __LINE__, (int)(node), (int)(byte))); \
if((node) < 0) { \
Perl_croak(aTHX_ "value of node is %d in Offset macro", (int)(node)); \
} else { \
#define DEBUG_STUDYDATA(data,depth) \
DEBUG_OPTIMISE_MORE_r(if(data){ \
PerlIO_printf(Perl_debug_log, \
- "%*s"/* Len:%"IVdf"/%"IVdf" */" Pos:%"IVdf"/%"IVdf \
+ "%*s"/* Len:%"IVdf"/%"IVdf" */"Pos:%"IVdf"/%"IVdf \
" Flags: %"IVdf" Whilem_c: %"IVdf" Lcp: %"IVdf" ", \
(int)(depth)*2, "", \
(IV)((data)->pos_min), \
}
if ( count == 1 ) {
SV **tmp = av_fetch( TRIE_REVCHARMAP(trie), idx, 0);
- const char *ch = SvPV_nolen_const( *tmp );
- DEBUG_OPTIMISE_r(
+ char *ch = SvPV_nolen( *tmp );
+ DEBUG_OPTIMISE_r({
+ SV *sv=sv_newmortal();
PerlIO_printf( Perl_debug_log,
"%*sPrefix State: %"UVuf" Idx:%"UVuf" Char='%s'\n",
(int)depth * 2 + 2, "",
- (UV)state, (UV)idx, ch)
- );
+ (UV)state, (UV)idx,
+ pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 6,
+ PL_colors[0], PL_colors[1],
+ (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
+ PERL_PV_ESCAPE_FIRSTCHAR
+ )
+ );
+ });
if ( state==1 ) {
OP( convert ) = nodetype;
str=STRING(convert);
STR_LEN(convert)=0;
}
- *str++=*ch;
- STR_LEN(convert)++;
-
+ while (*ch) {
+ *str++ = *ch++;
+ STR_LEN(convert)++;
+ }
+
} else {
#ifdef DEBUGGING
if (state>1)
trie->maxlen -= (state - 1);
DEBUG_r({
regnode *fix = convert;
+ U32 word = trie->wordcount;
mjd_nodelen++;
Set_Node_Offset_Length(convert, mjd_offset, state - 1);
while( ++fix < n ) {
Set_Node_Offset_Length(fix, 0, 0);
}
+ while (word--) {
+ SV ** const tmp = av_fetch( trie->words, word, 0 );
+ if (tmp) {
+ if ( STR_LEN(convert) <= SvCUR(*tmp) )
+ sv_chop(*tmp, SvPV_nolen(*tmp) + STR_LEN(convert));
+ else
+ sv_chop(*tmp, SvPV_nolen(*tmp) + SvCUR(*tmp));
+ }
+ }
});
if (trie->maxlen) {
convert = n;
*/
fail[ 0 ] = fail[ 1 ] = 0;
DEBUG_TRIE_COMPILE_r({
- PerlIO_printf(Perl_debug_log, "%*sStclass Failtable (%"UVuf" states): 0",
- (int)(depth * 2), "", numstates
+ PerlIO_printf(Perl_debug_log,
+ "%*sStclass Failtable (%"UVuf" states): 0",
+ (int)(depth * 2), "", (UV)numstates
);
for( q_read=1; q_read<numstates; q_read++ ) {
PerlIO_printf(Perl_debug_log, ", %"UVuf, (UV)fail[q_read]);
#endif
#define DEBUG_PEEP(str,scan,depth) \
- DEBUG_OPTIMISE_r({ \
+ DEBUG_OPTIMISE_r({if (scan){ \
SV * const mysv=sv_newmortal(); \
regnode *Next = regnext(scan); \
regprop(RExC_rx, mysv, scan); \
PerlIO_printf(Perl_debug_log, "%*s" str ">%3d: %s (%d)\n", \
(int)depth*2, "", REG_NODE_NUM(scan), SvPV_nolen_const(mysv),\
Next ? (REG_NODE_NUM(Next)) : 0 ); \
- });
+ }});
Newx(and_withp,1,struct regnode_charclass_class); \
SAVEFREEPV(and_withp)
+/* this is a chain of data about sub patterns we are processing that
+ need to be handled seperately/specially in study_chunk. Its so
+ we can simulate recursion without losing state. */
+struct scan_frame;
+typedef struct scan_frame {
+ regnode *last; /* last node to process in this frame */
+ regnode *next; /* next node to process when last is reached */
+ struct scan_frame *prev; /*previous frame*/
+ I32 stop; /* what stopparen do we use */
+} scan_frame;
+
STATIC I32
S_study_chunk(pTHX_ RExC_state_t *pRExC_state, regnode **scanp,
I32 *minlenp, I32 *deltap,
scan_data_t data_fake;
SV *re_trie_maxbuff = NULL;
regnode *first_non_open = scan;
+ I32 stopmin = I32_MAX;
+ scan_frame *frame = NULL;
+
GET_RE_DEBUG_FLAGS_DECL;
+
#ifdef DEBUGGING
StructCopy(&zero_scan_data, &data_fake, scan_data_t);
#endif
}
- while (scan && OP(scan) != END && scan < last) {
+ fake_study_recurse:
+ while ( scan && OP(scan) != END && scan < last ){
/* Peephole optimizer: */
DEBUG_STUDYDATA(data,depth);
DEBUG_PEEP("Peep",scan,depth);
/* The principal pseudo-switch. Cannot be a switch, since we
look into several different things. */
if (OP(scan) == BRANCH || OP(scan) == BRANCHJ
- || OP(scan) == IFTHEN || OP(scan) == SUSPEND) {
+ || OP(scan) == IFTHEN) {
next = regnext(scan);
code = OP(scan);
/* demq: the op(next)==code check is to see if we have "branch-branch" AFAICT */
- if (OP(next) == code || code == IFTHEN || code == SUSPEND) {
+ if (OP(next) == code || code == IFTHEN) {
/* NOTE - There is similar code to this block below for handling
TRIE nodes on a re-study. If you change stuff here check there
too. */
struct regnode_charclass_class accum;
regnode * const startbranch=scan;
- if (flags & SCF_DO_SUBSTR) /* XXXX Add !SUSPEND? */
+ if (flags & SCF_DO_SUBSTR)
scan_commit(pRExC_state, data, minlenp); /* Cannot merge strings after this. */
if (flags & SCF_DO_STCLASS)
cl_init_zero(pRExC_state, &accum);
scan = next;
if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
pars++;
+ if (data_fake.flags & SCF_SEEN_ACCEPT) {
+ if ( stopmin > minnext)
+ stopmin = min + min1;
+ flags &= ~SCF_DO_SUBSTR;
+ if (data)
+ data->flags |= SCF_SEEN_ACCEPT;
+ }
if (data) {
if (data_fake.flags & SF_HAS_EVAL)
data->flags |= SF_HAS_EVAL;
}
if (flags & SCF_DO_STCLASS)
cl_or(pRExC_state, &accum, &this_class);
- if (code == SUSPEND)
- break;
}
if (code == IFTHEN && num < 2) /* Empty ELSE branch */
min1 = 0;
if ( ((made == MADE_EXACT_TRIE &&
startbranch == first)
|| ( first_non_open == first )) &&
- depth==0 )
+ depth==0 ) {
flags |= SCF_TRIE_RESTUDY;
+ if ( startbranch == first
+ && scan == tail )
+ {
+ RExC_seen &=~REG_TOP_LEVEL_BRANCHES;
+ }
+ }
#endif
}
}
} else /* single branch is optimized. */
scan = NEXTOPER(scan);
continue;
+ } else if (OP(scan) == SUSPEND || OP(scan) == GOSUB || OP(scan) == GOSTART) {
+ scan_frame *newframe = NULL;
+ I32 paren;
+ regnode *start;
+ regnode *end;
+
+ if (OP(scan) != SUSPEND) {
+ /* set the pointer */
+ if (OP(scan) == GOSUB) {
+ paren = ARG(scan);
+ RExC_recurse[ARG2L(scan)] = scan;
+ start = RExC_open_parens[paren-1];
+ end = RExC_close_parens[paren-1];
+ } else {
+ paren = 0;
+ start = RExC_rx->program + 1;
+ end = RExC_opend;
+ }
+ if (!recursed) {
+ Newxz(recursed, (((RExC_npar)>>3) +1), U8);
+ SAVEFREEPV(recursed);
+ }
+ if (!PAREN_TEST(recursed,paren+1)) {
+ PAREN_SET(recursed,paren+1);
+ Newx(newframe,1,scan_frame);
+ } else {
+ if (flags & SCF_DO_SUBSTR) {
+ scan_commit(pRExC_state,data,minlenp);
+ data->longest = &(data->longest_float);
+ }
+ is_inf = is_inf_internal = 1;
+ if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
+ cl_anything(pRExC_state, data->start_class);
+ flags &= ~SCF_DO_STCLASS;
+ }
+ } else {
+ Newx(newframe,1,scan_frame);
+ paren = stopparen;
+ start = scan+2;
+ end = regnext(scan);
+ }
+ if (newframe) {
+ assert(start);
+ assert(end);
+ SAVEFREEPV(newframe);
+ newframe->next = regnext(scan);
+ newframe->last = last;
+ newframe->stop = stopparen;
+ newframe->prev = frame;
+
+ frame = newframe;
+ scan = start;
+ stopparen = paren;
+ last = end;
+
+ continue;
+ }
}
else if (OP(scan) == EXACT) {
I32 l = STR_LEN(scan);
if (data)
*(data->last_closep) = ARG(scan);
}
- else if (OP(scan) == GOSUB || OP(scan) == GOSTART) {
- /* set the pointer */
- I32 paren;
- regnode *start;
- regnode *end;
- if (OP(scan) == GOSUB) {
- paren = ARG(scan);
- RExC_recurse[ARG2L(scan)] = scan;
- start = RExC_open_parens[paren-1];
- end = RExC_close_parens[paren-1];
- } else {
- paren = 0;
- start = RExC_rx->program + 1;
- end = RExC_opend;
- }
- assert(start);
- assert(end);
- if (!recursed) {
- Newxz(recursed, (((RExC_npar)>>3) +1), U8);
- SAVEFREEPV(recursed);
- }
- if (!PAREN_TEST(recursed,paren+1)) {
- I32 deltanext = 0;
- PAREN_SET(recursed,paren+1);
-
- DEBUG_PEEP("goto",start,depth);
- min += study_chunk(
- pRExC_state,
- &start,
- minlenp,
- &deltanext,
- end+1,
- data,
- paren,
- recursed,
- and_withp,
- flags,depth+1);
- delta+=deltanext;
- if (deltanext == I32_MAX) {
- is_inf = is_inf_internal = 1;
- delta=deltanext;
- }
- DEBUG_PEEP("rtrn",end,depth);
- PAREN_UNSET(recursed,paren+1);
- } else {
- if (flags & SCF_DO_SUBSTR) {
- scan_commit(pRExC_state,data,minlenp);
- data->longest = &(data->longest_float);
- }
- is_inf = is_inf_internal = 1;
- if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
- cl_anything(pRExC_state, data->start_class);
- flags &= ~SCF_DO_STCLASS;
- }
- }
else if (OP(scan) == EVAL) {
if (data)
data->flags |= SF_HAS_EVAL;
}
- else if ( OP(scan)==OPFAIL ) {
+ else if ( PL_regkind[OP(scan)] == ENDLIKE ) {
if (flags & SCF_DO_SUBSTR) {
scan_commit(pRExC_state,data,minlenp);
flags &= ~SCF_DO_SUBSTR;
}
+ if (data && OP(scan)==ACCEPT) {
+ data->flags |= SCF_SEEN_ACCEPT;
+ if (stopmin > min)
+ stopmin = min;
+ }
}
else if (OP(scan) == LOGICAL && scan->flags == 2) /* Embedded follows */
{
if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
pars++;
-
+ if (data_fake.flags & SCF_SEEN_ACCEPT) {
+ if ( stopmin > min + min1)
+ stopmin = min + min1;
+ flags &= ~SCF_DO_SUBSTR;
+ if (data)
+ data->flags |= SCF_SEEN_ACCEPT;
+ }
if (data) {
if (data_fake.flags & SF_HAS_EVAL)
data->flags |= SF_HAS_EVAL;
/* Else: zero-length, ignore. */
scan = regnext(scan);
}
+ if (frame) {
+ last = frame->last;
+ scan = frame->next;
+ stopparen = frame->stop;
+ frame = frame->prev;
+ goto fake_study_recurse;
+ }
finish:
+ assert(!frame);
+
*scanp = scan;
*deltap = is_inf_internal ? I32_MAX : delta;
if (flags & SCF_DO_SUBSTR && is_inf)
DEBUG_STUDYDATA(data,depth);
- return min;
+ return min < stopmin ? min : stopmin;
}
STATIC I32
RExC_end = xend;
RExC_naughty = 0;
RExC_npar = 1;
+ RExC_cpar = 1;
+ RExC_nestroot = 0;
RExC_size = 0L;
RExC_emit = &PL_regdummy;
RExC_whilem_seen = 0;
if (RExC_whilem_seen > 15)
RExC_whilem_seen = 15;
+#ifdef DEBUGGING
+ /* Make room for a sentinel value at the end of the program */
+ RExC_size++;
+#endif
+
/* Allocate space and zero-initialize. Note, the two step process
of zeroing when in debug mode, thus anything assigned has to
happen after that */
r->substrs = 0; /* Useful during FAIL. */
r->startp = 0; /* Useful during FAIL. */
r->endp = 0;
+ r->swap = NULL;
r->paren_names = 0;
if (RExC_seen & REG_SEEN_RECURSE) {
RExC_end = xend;
RExC_naughty = 0;
RExC_npar = 1;
+ RExC_cpar = 1;
RExC_emit_start = r->program;
RExC_emit = r->program;
+#ifdef DEBUGGING
+ /* put a sentinal on the end of the program so we can check for
+ overwrites */
+ r->program[RExC_size].type = 255;
+#endif
/* Store the count of eval-groups for security checks: */
RExC_emit->next_off = (RExC_seen_evals > (I32)U16_MAX) ? U16_MAX : (U16)RExC_seen_evals;
REGC((U8)REG_MAGIC, (char*) RExC_emit++);
#ifdef TRIE_STUDY_OPT
if ( restudied ) {
+ U32 seen=RExC_seen;
DEBUG_OPTIMISE_r(PerlIO_printf(Perl_debug_log,"Restudying\n"));
- RExC_state=copyRExC_state;
+
+ RExC_state = copyRExC_state;
+ if (seen & REG_TOP_LEVEL_BRANCHES)
+ RExC_seen |= REG_TOP_LEVEL_BRANCHES;
+ else
+ RExC_seen &= ~REG_TOP_LEVEL_BRANCHES;
if (data.last_found) {
SvREFCNT_dec(data.longest_fixed);
SvREFCNT_dec(data.longest_float);
StructCopy(&zero_scan_data, &data, scan_data_t);
} else {
StructCopy(&zero_scan_data, &data, scan_data_t);
- copyRExC_state=RExC_state;
+ copyRExC_state = RExC_state;
}
#else
StructCopy(&zero_scan_data, &data, scan_data_t);
first = NEXTOPER(first);
goto again;
}
- else if (!sawopen && (OP(first) == STAR &&
+ else if ((!sawopen || !RExC_sawback) &&
+ (OP(first) == STAR &&
PL_regkind[OP(NEXTOPER(first))] == REG_ANY) &&
!(r->reganch & ROPT_ANCH) )
{
* it happens that c_offset_min has been invalidated, since the
* earlier string may buy us something the later one won't.]
*/
- minlen = 0;
-
+
data.longest_fixed = newSVpvs("");
data.longest_float = newSVpvs("");
data.last_found = newSVpvs("");
} else /* XXXX Check for BOUND? */
stclass_flag = 0;
data.last_closep = &last_close;
-
+
minlen = study_chunk(pRExC_state, &first, &minlen, &fake, scan + RExC_size, /* Up to end */
&data, -1, NULL, NULL,
SCF_DO_SUBSTR | SCF_WHILEM_VISITED_POS | stclass_flag,0);
struct regnode_charclass_class ch_class;
I32 last_close = 0;
- DEBUG_COMPILE_r(PerlIO_printf(Perl_debug_log, "\n"));
+ DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, "\nMulti Top Level\n"));
scan = r->program + 1;
cl_init(pRExC_state, &ch_class);
data.start_class = &ch_class;
data.last_closep = &last_close;
+
minlen = study_chunk(pRExC_state, &scan, &minlen, &fake, scan + RExC_size,
&data, -1, NULL, NULL, SCF_DO_STCLASS_AND|SCF_WHILEM_VISITED_POS,0);
-
+
CHECK_RESTUDY_GOTO;
r->check_substr = r->check_utf8 = r->anchored_substr = r->anchored_utf8
/* Guard against an embedded (?=) or (?<=) with a longer minlen than
the "real" pattern. */
+ DEBUG_OPTIMISE_r({
+ PerlIO_printf(Perl_debug_log,"minlen: %"IVdf" r->minlen:%"IVdf"\n",
+ minlen, r->minlen);
+ });
+ r->minlenret = minlen;
if (r->minlen < minlen)
r->minlen = minlen;
r->reganch |= ROPT_EVAL_SEEN;
if (RExC_seen & REG_SEEN_CANY)
r->reganch |= ROPT_CANY_SEEN;
+ if (RExC_seen & REG_SEEN_VERBARG)
+ r->reganch |= ROPT_VERBARG_SEEN;
+ if (RExC_seen & REG_SEEN_CUTGROUP)
+ r->reganch |= ROPT_CUTGROUP_SEEN;
if (RExC_paren_names)
r->paren_names = (HV*)SvREFCNT_inc(RExC_paren_names);
else
}
Newxz(r->startp, RExC_npar, I32);
Newxz(r->endp, RExC_npar, I32);
-
- DEBUG_r( RX_DEBUG_on(r) );
+ /* assume we don't need to swap parens around before we match */
+
DEBUG_DUMP_r({
PerlIO_printf(Perl_debug_log,"Final program:\n");
regdump(r);
#define REGTAIL_STUDY(x,y,z) regtail((x),(y),(z),depth+1)
#endif
+/* this idea is borrowed from STR_WITH_LEN in handy.h */
+#define CHECK_WORD(s,v,l) \
+ (((sizeof(s)-1)==(l)) && (strnEQ(start_verb, (s ""), (sizeof(s)-1))))
+
STATIC regnode *
S_reg(pTHX_ RExC_state_t *pRExC_state, I32 paren, I32 *flagp,U32 depth)
/* paren: Parenthesized? 0=top, 1=(, inside: changed to letter. */
/* Make an OPEN node, if parenthesized. */
if (paren) {
+ if ( *RExC_parse == '*') { /* (*VERB:ARG) */
+ char *start_verb = RExC_parse;
+ STRLEN verb_len = 0;
+ char *start_arg = NULL;
+ unsigned char op = 0;
+ int argok = 1;
+ int internal_argval = 0; /* internal_argval is only useful if !argok */
+ while ( *RExC_parse && *RExC_parse != ')' ) {
+ if ( *RExC_parse == ':' ) {
+ start_arg = RExC_parse + 1;
+ break;
+ }
+ RExC_parse++;
+ }
+ ++start_verb;
+ verb_len = RExC_parse - start_verb;
+ if ( start_arg ) {
+ RExC_parse++;
+ while ( *RExC_parse && *RExC_parse != ')' )
+ RExC_parse++;
+ if ( *RExC_parse != ')' )
+ vFAIL("Unterminated verb pattern argument");
+ if ( RExC_parse == start_arg )
+ start_arg = NULL;
+ } else {
+ if ( *RExC_parse != ')' )
+ vFAIL("Unterminated verb pattern");
+ }
+
+ switch ( *start_verb ) {
+ case 'A': /* (*ACCEPT) */
+ if ( CHECK_WORD("ACCEPT",start_verb,verb_len) ) {
+ op = ACCEPT;
+ internal_argval = RExC_nestroot;
+ }
+ break;
+ case 'C': /* (*COMMIT) */
+ if ( CHECK_WORD("COMMIT",start_verb,verb_len) )
+ op = COMMIT;
+ break;
+ case 'F': /* (*FAIL) */
+ if ( verb_len==1 || CHECK_WORD("FAIL",start_verb,verb_len) ) {
+ op = OPFAIL;
+ argok = 0;
+ }
+ break;
+ case ':': /* (*:NAME) */
+ case 'M': /* (*MARK:NAME) */
+ if ( verb_len==0 || CHECK_WORD("MARK",start_verb,verb_len) ) {
+ op = MARKPOINT;
+ argok = -1;
+ }
+ break;
+ case 'P': /* (*PRUNE) */
+ if ( CHECK_WORD("PRUNE",start_verb,verb_len) )
+ op = PRUNE;
+ break;
+ case 'S': /* (*SKIP) */
+ if ( CHECK_WORD("SKIP",start_verb,verb_len) )
+ op = SKIP;
+ break;
+ case 'T': /* (*THEN) */
+ /* [19:06] <TimToady> :: is then */
+ if ( CHECK_WORD("THEN",start_verb,verb_len) ) {
+ op = CUTGROUP;
+ RExC_seen |= REG_SEEN_CUTGROUP;
+ }
+ break;
+ }
+ if ( ! op ) {
+ RExC_parse++;
+ vFAIL3("Unknown verb pattern '%.*s'",
+ verb_len, start_verb);
+ }
+ if ( argok ) {
+ if ( start_arg && internal_argval ) {
+ vFAIL3("Verb pattern '%.*s' may not have an argument",
+ verb_len, start_verb);
+ } else if ( argok < 0 && !start_arg ) {
+ vFAIL3("Verb pattern '%.*s' has a mandatory argument",
+ verb_len, start_verb);
+ } else {
+ ret = reganode(pRExC_state, op, internal_argval);
+ if ( ! internal_argval && ! SIZE_ONLY ) {
+ if (start_arg) {
+ SV *sv = newSVpvn( start_arg, RExC_parse - start_arg);
+ ARG(ret) = add_data( pRExC_state, 1, "S" );
+ RExC_rx->data->data[ARG(ret)]=(void*)sv;
+ ret->flags = 0;
+ } else {
+ ret->flags = 1;
+ }
+ }
+ }
+ if (!internal_argval)
+ RExC_seen |= REG_SEEN_VERBARG;
+ } else if ( start_arg ) {
+ vFAIL3("Verb pattern '%.*s' may not have an argument",
+ verb_len, start_verb);
+ } else {
+ ret = reg_node(pRExC_state, op);
+ }
+ nextchar(pRExC_state);
+ return ret;
+ } else
if (*RExC_parse == '?') { /* (?...) */
U32 posflags = 0, negflags = 0;
U32 *flagsp = &posflags;
RExC_parse++;
case '=': /* (?=...) */
case '!': /* (?!...) */
- if (*RExC_parse == ')')
- goto do_op_fail;
RExC_seen_zerolen++;
+ if (*RExC_parse == ')') {
+ ret=reg_node(pRExC_state, OPFAIL);
+ nextchar(pRExC_state);
+ return ret;
+ }
case ':': /* (?:...) */
case '>': /* (?>...) */
break;
- case 'C': /* (?CUT) and (?COMMIT) */
- if (RExC_parse[0] == 'O' &&
- RExC_parse[1] == 'M' &&
- RExC_parse[2] == 'M' &&
- RExC_parse[3] == 'I' &&
- RExC_parse[4] == 'T' &&
- RExC_parse[5] == ')')
- {
- RExC_parse+=5;
- ret = reg_node(pRExC_state, COMMIT);
- } else if (
- RExC_parse[0] == 'U' &&
- RExC_parse[1] == 'T' &&
- RExC_parse[2] == ')')
- {
- RExC_parse+=2;
- ret = reg_node(pRExC_state, CUT);
- } else {
- vFAIL("Sequence (?C... not terminated");
- }
- nextchar(pRExC_state);
- return ret;
- break;
- case 'E': /* (?ERROR) */
- if (RExC_parse[0] == 'R' &&
- RExC_parse[1] == 'R' &&
- RExC_parse[2] == 'O' &&
- RExC_parse[3] == 'R' &&
- RExC_parse[4] == ')')
- {
- RExC_parse+=4;
- ret = reg_node(pRExC_state, OPERROR);
- } else {
- vFAIL("Sequence (?E... not terminated");
- }
- nextchar(pRExC_state);
- return ret;
- break;
- case 'F':
- if (RExC_parse[0] == 'A' &&
- RExC_parse[1] == 'I' &&
- RExC_parse[2] == 'L')
- RExC_parse+=3;
- if (*RExC_parse != ')')
- vFAIL("Sequence (?FAIL) or (?F) not terminated");
- do_op_fail:
- ret = reg_node(pRExC_state, OPFAIL);
- nextchar(pRExC_state);
- return ret;
- break;
case '$': /* (?$...) */
case '@': /* (?@...) */
vFAIL2("Sequence (?%c...) not implemented", (int)paren);
}
goto gen_recurse_regop;
/* NOT REACHED */
+ case '+':
+ if (!(RExC_parse[0] >= '1' && RExC_parse[0] <= '9')) {
+ RExC_parse++;
+ vFAIL("Illegal pattern");
+ }
+ goto parse_recursion;
+ /* NOT REACHED*/
+ case '-': /* (?-1) */
+ if (!(RExC_parse[0] >= '1' && RExC_parse[0] <= '9')) {
+ RExC_parse--; /* rewind to let it be handled later */
+ goto parse_flags;
+ }
+ /*FALLTHROUGH */
case '1': case '2': case '3': case '4': /* (?1) */
case '5': case '6': case '7': case '8': case '9':
RExC_parse--;
+ parse_recursion:
num = atoi(RExC_parse);
parse_start = RExC_parse - 1; /* MJD */
+ if (*RExC_parse == '-')
+ RExC_parse++;
while (isDIGIT(*RExC_parse))
RExC_parse++;
if (*RExC_parse!=')')
vFAIL("Expecting close bracket");
gen_recurse_regop:
+ if ( paren == '-' ) {
+ /*
+ Diagram of capture buffer numbering.
+ Top line is the normal capture buffer numbers
+ Botton line is the negative indexing as from
+ the X (the (?-2))
+
+ + 1 2 3 4 5 X 6 7
+ /(a(x)y)(a(b(c(?-2)d)e)f)(g(h))/
+ - 5 4 3 2 1 X x x
+
+ */
+ num = RExC_npar + num;
+ if (num < 1) {
+ RExC_parse++;
+ vFAIL("Reference to nonexistent group");
+ }
+ } else if ( paren == '+' ) {
+ num = RExC_npar + num - 1;
+ }
+
ret = reganode(pRExC_state, GOSUB, num);
if (!SIZE_ONLY) {
if (num > (I32)RExC_rx->nparens) {
capturing_parens:
parno = RExC_npar;
RExC_npar++;
+
ret = reganode(pRExC_state, OPEN, parno);
- if (!SIZE_ONLY && RExC_seen & REG_SEEN_RECURSE) {
- DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
+ if (!SIZE_ONLY ){
+ if (!RExC_nestroot)
+ RExC_nestroot = parno;
+ if (RExC_seen & REG_SEEN_RECURSE) {
+ DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
"Setting open paren #%"IVdf" to %d\n",
(IV)parno, REG_NODE_NUM(ret)));
- RExC_open_parens[parno-1]= ret;
+ RExC_open_parens[parno-1]= ret;
+ }
}
Set_Node_Length(ret, 1); /* MJD */
Set_Node_Offset(ret, RExC_parse); /* MJD */
ender = reg_node(pRExC_state, TAIL);
break;
case 1:
+ RExC_cpar++;
ender = reganode(pRExC_state, CLOSE, parno);
if (!SIZE_ONLY && RExC_seen & REG_SEEN_RECURSE) {
DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
"Setting close paren #%"IVdf" to %d\n",
(IV)parno, REG_NODE_NUM(ender)));
RExC_close_parens[parno-1]= ender;
+ if (RExC_nestroot == parno)
+ RExC_nestroot = 0;
}
Set_Node_Offset(ender,RExC_parse+1); /* MJD */
Set_Node_Length(ender,1); /* MJD */
}
+/*
+ * reg_recode
+ *
+ * It returns the code point in utf8 for the value in *encp.
+ * value: a code value in the source encoding
+ * encp: a pointer to an Encode object
+ *
+ * If the result from Encode is not a single character,
+ * it returns U+FFFD (Replacement character) and sets *encp to NULL.
+ */
+STATIC UV
+S_reg_recode(pTHX_ const char value, SV **encp)
+{
+ STRLEN numlen = 1;
+ SV * const sv = sv_2mortal(newSVpvn(&value, numlen));
+ const char * const s = encp && *encp ? sv_recode_to_utf8(sv, *encp)
+ : SvPVX(sv);
+ const STRLEN newlen = SvCUR(sv);
+ UV uv = UNICODE_REPLACEMENT;
+
+ if (newlen)
+ uv = SvUTF8(sv)
+ ? utf8n_to_uvchr((U8*)s, newlen, &numlen, UTF8_ALLOW_DEFAULT)
+ : *(U8*)s;
+
+ if (!newlen || numlen != newlen) {
+ uv = UNICODE_REPLACEMENT;
+ if (encp)
+ *encp = NULL;
+ }
+ return uv;
+}
+
/*
- regatom - the lowest level
case 'c':
case '0':
goto defchar;
+ case 'R':
case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
{
- const I32 num = atoi(RExC_parse);
-
+ I32 num;
+ bool isrel=(*RExC_parse=='R');
+ if (isrel)
+ RExC_parse++;
+ num = atoi(RExC_parse);
+ if (isrel) {
+ num = RExC_cpar - num;
+ if (num < 1)
+ vFAIL("Reference to nonexistent or unclosed group");
+ }
if (num > 9 && num >= RExC_npar)
goto defchar;
else {
while (isDIGIT(*RExC_parse))
RExC_parse++;
- if (!SIZE_ONLY && num > (I32)RExC_rx->nparens)
- vFAIL("Reference to nonexistent group");
+ if (!SIZE_ONLY) {
+ if (num > (I32)RExC_rx->nparens)
+ vFAIL("Reference to nonexistent group");
+ /* People make this error all the time apparently.
+ So we cant fail on it, even though we should
+
+ else if (num >= RExC_cpar)
+ vFAIL("Reference to unclosed group will always match");
+ */
+ }
RExC_sawback = 1;
ret = reganode(pRExC_state,
(U8)(FOLD ? (LOC ? REFFL : REFF) : REF),
case 'p':
case 'P':
case 'N':
+ case 'R':
--p;
goto loopdone;
case 'n':
ender = grok_hex(p, &numlen, &flags, NULL);
p += numlen;
}
+ if (PL_encoding && ender < 0x100)
+ goto recode_encoding;
break;
case 'c':
p++;
--p;
goto loopdone;
}
+ if (PL_encoding && ender < 0x100)
+ goto recode_encoding;
+ break;
+ recode_encoding:
+ {
+ SV* enc = PL_encoding;
+ ender = reg_recode((const char)(U8)ender, &enc);
+ if (!enc && SIZE_ONLY && ckWARN(WARN_REGEXP))
+ vWARN(p, "Invalid escape in the specified encoding");
+ RExC_utf8 = 1;
+ }
break;
case '\0':
if (p >= RExC_end)
break;
}
- /* If the encoding pragma is in effect recode the text of
- * any EXACT-kind nodes. */
- if (ret && PL_encoding && PL_regkind[OP(ret)] == EXACT) {
- const STRLEN oldlen = STR_LEN(ret);
- SV * const sv = sv_2mortal(newSVpvn(STRING(ret), oldlen));
-
- if (RExC_utf8)
- SvUTF8_on(sv);
- if (sv_utf8_downgrade(sv, TRUE)) {
- const char * const s = sv_recode_to_utf8(sv, PL_encoding);
- const STRLEN newlen = SvCUR(sv);
-
- if (SvUTF8(sv))
- RExC_utf8 = 1;
- if (!SIZE_ONLY) {
- GET_RE_DEBUG_FLAGS_DECL;
- DEBUG_COMPILE_r(PerlIO_printf(Perl_debug_log, "recode %*s to %*s\n",
- (int)oldlen, STRING(ret),
- (int)newlen, s));
- Copy(s, STRING(ret), newlen, char);
- STR_LEN(ret) += newlen - oldlen;
- RExC_emit += STR_SZ(newlen) - STR_SZ(oldlen);
- } else
- RExC_size += STR_SZ(newlen) - STR_SZ(oldlen);
- }
- }
-
return(ret);
}
value = grok_hex(RExC_parse, &numlen, &flags, NULL);
RExC_parse += numlen;
}
+ if (PL_encoding && value < 0x100)
+ goto recode_encoding;
break;
case 'c':
value = UCHARAT(RExC_parse++);
break;
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
- {
- I32 flags = 0;
- numlen = 3;
- value = grok_oct(--RExC_parse, &numlen, &flags, NULL);
- RExC_parse += numlen;
- break;
- }
+ {
+ I32 flags = 0;
+ numlen = 3;
+ value = grok_oct(--RExC_parse, &numlen, &flags, NULL);
+ RExC_parse += numlen;
+ if (PL_encoding && value < 0x100)
+ goto recode_encoding;
+ break;
+ }
+ recode_encoding:
+ {
+ SV* enc = PL_encoding;
+ value = reg_recode((const char)(U8)value, &enc);
+ if (!enc && SIZE_ONLY && ckWARN(WARN_REGEXP))
+ vWARN(RExC_parse,
+ "Invalid escape in the specified encoding");
+ break;
+ }
default:
if (!SIZE_ONLY && isALPHA(value) && ckWARN(WARN_REGEXP))
vWARN2(RExC_parse,
RExC_size += 1;
return(ret);
}
+#ifdef DEBUGGING
+ if (OP(RExC_emit) == 255)
+ Perl_croak(aTHX_ "panic: reg_node overrun trying to emit %s: %d ",
+ reg_name[op], OP(RExC_emit));
+#endif
NODE_ALIGN_FILL(ret);
ptr = ret;
FILL_ADVANCE_NODE(ptr, op);
}
RExC_emit = ptr;
-
return(ret);
}
*/
return(ret);
}
-
+#ifdef DEBUGGING
+ if (OP(RExC_emit) == 255)
+ Perl_croak(aTHX_ "panic: reganode overwriting end of allocated program space");
+#endif
NODE_ALIGN_FILL(ret);
ptr = ret;
FILL_ADVANCE_NODE_ARG(ptr, op, arg);
}
RExC_emit = ptr;
-
return(ret);
}
dst = RExC_emit;
if (RExC_open_parens) {
int paren;
- DEBUG_PARSE_FMT("inst"," - %d",RExC_npar);
+ DEBUG_PARSE_FMT("inst"," - %"IVdf, (IV)RExC_npar);
for ( paren=0 ; paren < RExC_npar ; paren++ ) {
if ( RExC_open_parens[paren] >= opnd ) {
DEBUG_PARSE_FMT("open"," - %d",size);
GET_RE_DEBUG_FLAGS_DECL;
sv_setpvn(sv, "", 0);
+
if (OP(o) > REGNODE_MAX) /* regnode.type is unsigned */
/* It would be nice to FAIL() here, but this may be called from
regexec.c, and it would be hard to supply pRExC_state. */
}
else if (k == WHILEM && o->flags) /* Ordinal/of */
Perl_sv_catpvf(aTHX_ sv, "[%d/%d]", o->flags & 0xf, o->flags>>4);
- else if (k == REF || k == OPEN || k == CLOSE || k == GROUPP)
+ else if (k == REF || k == OPEN || k == CLOSE || k == GROUPP || OP(o)==ACCEPT)
Perl_sv_catpvf(aTHX_ sv, "%d", (int)ARG(o)); /* Parenth number */
else if (k == GOSUB)
Perl_sv_catpvf(aTHX_ sv, "%d[%+d]", (int)ARG(o),(int)ARG2L(o)); /* Paren and offset */
- else if (k == LOGICAL)
+ else if (k == VERB) {
+ if (!o->flags)
+ Perl_sv_catpvf(aTHX_ sv, ":%"SVf,
+ (SV*)prog->data->data[ ARG( o ) ]);
+ } else if (k == LOGICAL)
Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* 2: embedded, otherwise 1 */
else if (k == ANYOF) {
int i, rangestart = -1;
DEBUG_COMPILE_r({
if (!PL_colorset)
reginitcolors();
- if (RX_DEBUG(r)){
- SV *dsv= sv_newmortal();
+ {
+ SV *dsv= sv_newmortal();
RE_PV_QUOTED_DECL(s, (r->reganch & ROPT_UTF8),
dsv, r->precomp, r->prelen, 60);
PerlIO_printf(Perl_debug_log,"%sFreeing REx:%s %s\n",
if (trie->nextword)
Safefree(trie->nextword);
#ifdef DEBUGGING
- if (RX_DEBUG(r)) {
- if (trie->words)
- SvREFCNT_dec((SV*)trie->words);
- if (trie->revcharmap)
- SvREFCNT_dec((SV*)trie->revcharmap);
- }
+ if (trie->words)
+ SvREFCNT_dec((SV*)trie->words);
+ if (trie->revcharmap)
+ SvREFCNT_dec((SV*)trie->revcharmap);
#endif
Safefree(r->data->data[n]); /* do this last!!!! */
}
}
Safefree(r->startp);
Safefree(r->endp);
+ if (r->swap) {
+ Safefree(r->swap->startp);
+ Safefree(r->swap->endp);
+ Safefree(r->swap);
+ }
Safefree(r);
}
Copy(r->startp, ret->startp, npar, I32);
Newx(ret->endp, npar, I32);
Copy(r->startp, ret->startp, npar, I32);
+ if(r->swap) {
+ Newx(ret->swap, 1, regexp_paren_ofs);
+ /* no need to copy these */
+ Newx(ret->swap->startp, npar, I32);
+ Newx(ret->swap->endp, npar, I32);
+ } else {
+ ret->swap = NULL;
+ }
Newx(ret->substrs, 1, struct reg_substr_data);
for (s = ret->substrs->data, i = 0; i < 3; i++, s++) {
for (i = 0; i < count; i++) {
d->what[i] = r->data->what[i];
switch (d->what[i]) {
- /* legal options are one of: sfpont
+ /* legal options are one of: sSfpont
see also regcomp.h and pregfree() */
case 's':
case 'S':
ret->precomp = SAVEPVN(r->precomp, r->prelen);
ret->refcnt = r->refcnt;
ret->minlen = r->minlen;
+ ret->minlenret = r->minlenret;
ret->prelen = r->prelen;
ret->nparens = r->nparens;
ret->lastparen = r->lastparen;
}
#endif
+/*
+ reg_stringify()
+
+ converts a regexp embedded in a MAGIC struct to its stringified form,
+ caching the converted form in the struct and returns the cached
+ string.
+
+ If lp is nonnull then it is used to return the length of the
+ resulting string
+
+ If flags is nonnull and the returned string contains UTF8 then
+ (flags & 1) will be true.
+
+ If haseval is nonnull then it is used to return whether the pattern
+ contains evals.
+
+ Normally called via macro:
+
+ CALLREG_STRINGIFY(mg,0,0);
+
+ And internally with
+
+ CALLREG_AS_STR(mg,lp,flags,haseval)
+
+ See sv_2pv_flags() in sv.c for an example of internal usage.
+
+ */
+
+char *
+Perl_reg_stringify(pTHX_ MAGIC *mg, STRLEN *lp, U32 *flags, I32 *haseval ) {
+ dVAR;
+ const regexp * const re = (regexp *)mg->mg_obj;
+
+ if (!mg->mg_ptr) {
+ const char *fptr = "msix";
+ char reflags[6];
+ char ch;
+ int left = 0;
+ int right = 4;
+ bool need_newline = 0;
+ U16 reganch = (U16)((re->reganch & PMf_COMPILETIME) >> 12);
+
+ while((ch = *fptr++)) {
+ if(reganch & 1) {
+ reflags[left++] = ch;
+ }
+ else {
+ reflags[right--] = ch;
+ }
+ reganch >>= 1;
+ }
+ if(left != 4) {
+ reflags[left] = '-';
+ left = 5;
+ }
+
+ mg->mg_len = re->prelen + 4 + left;
+ /*
+ * If /x was used, we have to worry about a regex ending with a
+ * comment later being embedded within another regex. If so, we don't
+ * want this regex's "commentization" to leak out to the right part of
+ * the enclosing regex, we must cap it with a newline.
+ *
+ * So, if /x was used, we scan backwards from the end of the regex. If
+ * we find a '#' before we find a newline, we need to add a newline
+ * ourself. If we find a '\n' first (or if we don't find '#' or '\n'),
+ * we don't need to add anything. -jfriedl
+ */
+ if (PMf_EXTENDED & re->reganch) {
+ const char *endptr = re->precomp + re->prelen;
+ while (endptr >= re->precomp) {
+ const char c = *(endptr--);
+ if (c == '\n')
+ break; /* don't need another */
+ if (c == '#') {
+ /* we end while in a comment, so we need a newline */
+ mg->mg_len++; /* save space for it */
+ need_newline = 1; /* note to add it */
+ break;
+ }
+ }
+ }
+
+ Newx(mg->mg_ptr, mg->mg_len + 1 + left, char);
+ mg->mg_ptr[0] = '(';
+ mg->mg_ptr[1] = '?';
+ Copy(reflags, mg->mg_ptr+2, left, char);
+ *(mg->mg_ptr+left+2) = ':';
+ Copy(re->precomp, mg->mg_ptr+3+left, re->prelen, char);
+ if (need_newline)
+ mg->mg_ptr[mg->mg_len - 2] = '\n';
+ mg->mg_ptr[mg->mg_len - 1] = ')';
+ mg->mg_ptr[mg->mg_len] = 0;
+ }
+ if (haseval)
+ *haseval = re->program[0].next_off;
+ if (flags)
+ *flags = ((re->reganch & ROPT_UTF8) ? 1 : 0);
+
+ if (lp)
+ *lp = mg->mg_len;
+ return mg->mg_ptr;
+}
+
+
#ifndef PERL_IN_XSUB_RE
/*
- regnext - dig the "next" pointer out of a node
NODE_ALIGN(node);
op = OP(node);
- if (op == CLOSE)
+ if (op == CLOSE || op == WHILEM)
indent--;
next = regnext((regnode *)node);
}
if (op == CURLYX || op == OPEN)
indent++;
- else if (op == WHILEM)
- indent--;
}
CLEAR_OPTSTART;
#ifdef DEBUG_DUMPUNTIL
projects / p5sagit/p5-mst-13.2.git / blobdiff