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freebsd-dev/contrib/perl5/regcomp.c
Mark Murray 120a02d4f3 Vendor import of Perl 5.006
2000-06-25 11:04:01 +00:00

4227 lines
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/* regcomp.c
*/
/*
* "A fair jaw-cracker dwarf-language must be." --Samwise Gamgee
*/
/* NOTE: this is derived from Henry Spencer's regexp code, and should not
* confused with the original package (see point 3 below). Thanks, Henry!
*/
/* Additional note: this code is very heavily munged from Henry's version
* in places. In some spots I've traded clarity for efficiency, so don't
* blame Henry for some of the lack of readability.
*/
/* The names of the functions have been changed from regcomp and
* regexec to pregcomp and pregexec in order to avoid conflicts
* with the POSIX routines of the same names.
*/
#ifdef PERL_EXT_RE_BUILD
/* need to replace pregcomp et al, so enable that */
# ifndef PERL_IN_XSUB_RE
# define PERL_IN_XSUB_RE
# endif
/* need access to debugger hooks */
# if defined(PERL_EXT_RE_DEBUG) && !defined(DEBUGGING)
# define DEBUGGING
# endif
#endif
#ifdef PERL_IN_XSUB_RE
/* We *really* need to overwrite these symbols: */
# define Perl_pregcomp my_regcomp
# define Perl_regdump my_regdump
# define Perl_regprop my_regprop
# define Perl_pregfree my_regfree
# define Perl_re_intuit_string my_re_intuit_string
/* *These* symbols are masked to allow static link. */
# define Perl_regnext my_regnext
# define Perl_save_re_context my_save_re_context
# define Perl_reginitcolors my_reginitcolors
# define PERL_NO_GET_CONTEXT
#endif
/*SUPPRESS 112*/
/*
* pregcomp and pregexec -- regsub and regerror are not used in perl
*
* Copyright (c) 1986 by University of Toronto.
* Written by Henry Spencer. Not derived from licensed software.
*
* Permission is granted to anyone to use this software for any
* purpose on any computer system, and to redistribute it freely,
* subject to the following restrictions:
*
* 1. The author is not responsible for the consequences of use of
* this software, no matter how awful, even if they arise
* from defects in it.
*
* 2. The origin of this software must not be misrepresented, either
* by explicit claim or by omission.
*
* 3. Altered versions must be plainly marked as such, and must not
* be misrepresented as being the original software.
*
*
**** Alterations to Henry's code are...
****
**** Copyright (c) 1991-2000, Larry Wall
****
**** You may distribute under the terms of either the GNU General Public
**** License or the Artistic License, as specified in the README file.
*
* Beware that some of this code is subtly aware of the way operator
* precedence is structured in regular expressions. Serious changes in
* regular-expression syntax might require a total rethink.
*/
#include "EXTERN.h"
#define PERL_IN_REGCOMP_C
#include "perl.h"
#ifdef PERL_IN_XSUB_RE
# if defined(PERL_CAPI) || defined(PERL_OBJECT)
# include "XSUB.h"
# endif
#else
# include "INTERN.h"
#endif
#define REG_COMP_C
#include "regcomp.h"
#ifdef op
#undef op
#endif /* op */
#ifdef MSDOS
# if defined(BUGGY_MSC6)
/* MSC 6.00A breaks on op/regexp.t test 85 unless we turn this off */
# pragma optimize("a",off)
/* But MSC 6.00A is happy with 'w', for aliases only across function calls*/
# pragma optimize("w",on )
# endif /* BUGGY_MSC6 */
#endif /* MSDOS */
#ifndef STATIC
#define STATIC static
#endif
#define ISMULT1(c) ((c) == '*' || (c) == '+' || (c) == '?')
#define ISMULT2(s) ((*s) == '*' || (*s) == '+' || (*s) == '?' || \
((*s) == '{' && regcurly(s)))
#ifdef atarist
#define PERL_META "^$.[()|?+*\\"
#else
#define META "^$.[()|?+*\\"
#endif
#ifdef SPSTART
#undef SPSTART /* dratted cpp namespace... */
#endif
/*
* Flags to be passed up and down.
*/
#define WORST 0 /* Worst case. */
#define HASWIDTH 0x1 /* Known to match non-null strings. */
#define SIMPLE 0x2 /* Simple enough to be STAR/PLUS operand. */
#define SPSTART 0x4 /* Starts with * or +. */
#define TRYAGAIN 0x8 /* Weeded out a declaration. */
/* Length of a variant. */
typedef struct scan_data_t {
I32 len_min;
I32 len_delta;
I32 pos_min;
I32 pos_delta;
SV *last_found;
I32 last_end; /* min value, <0 unless valid. */
I32 last_start_min;
I32 last_start_max;
SV **longest; /* Either &l_fixed, or &l_float. */
SV *longest_fixed;
I32 offset_fixed;
SV *longest_float;
I32 offset_float_min;
I32 offset_float_max;
I32 flags;
I32 whilem_c;
struct regnode_charclass_class *start_class;
} scan_data_t;
/*
* Forward declarations for pregcomp()'s friends.
*/
static scan_data_t zero_scan_data = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0 };
#define SF_BEFORE_EOL (SF_BEFORE_SEOL|SF_BEFORE_MEOL)
#define SF_BEFORE_SEOL 0x1
#define SF_BEFORE_MEOL 0x2
#define SF_FIX_BEFORE_EOL (SF_FIX_BEFORE_SEOL|SF_FIX_BEFORE_MEOL)
#define SF_FL_BEFORE_EOL (SF_FL_BEFORE_SEOL|SF_FL_BEFORE_MEOL)
#ifdef NO_UNARY_PLUS
# define SF_FIX_SHIFT_EOL (0+2)
# define SF_FL_SHIFT_EOL (0+4)
#else
# define SF_FIX_SHIFT_EOL (+2)
# define SF_FL_SHIFT_EOL (+4)
#endif
#define SF_FIX_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FIX_SHIFT_EOL)
#define SF_FIX_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FIX_SHIFT_EOL)
#define SF_FL_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FL_SHIFT_EOL)
#define SF_FL_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FL_SHIFT_EOL) /* 0x20 */
#define SF_IS_INF 0x40
#define SF_HAS_PAR 0x80
#define SF_IN_PAR 0x100
#define SF_HAS_EVAL 0x200
#define SCF_DO_SUBSTR 0x400
#define SCF_DO_STCLASS_AND 0x0800
#define SCF_DO_STCLASS_OR 0x1000
#define SCF_DO_STCLASS (SCF_DO_STCLASS_AND|SCF_DO_STCLASS_OR)
#define RF_utf8 8
#define UTF (PL_reg_flags & RF_utf8)
#define LOC (PL_regflags & PMf_LOCALE)
#define FOLD (PL_regflags & PMf_FOLD)
#define OOB_CHAR8 1234
#define OOB_UTF8 123456
#define OOB_NAMEDCLASS -1
#define CHR_SVLEN(sv) (UTF ? sv_len_utf8(sv) : SvCUR(sv))
#define CHR_DIST(a,b) (UTF ? utf8_distance(a,b) : a - b)
/* Allow for side effects in s */
#define REGC(c,s) STMT_START { if (!SIZE_ONLY) *(s) = (c); else (s);} STMT_END
static void clear_re(pTHXo_ void *r);
/* Mark that we cannot extend a found fixed substring at this point.
Updata the longest found anchored substring and the longest found
floating substrings if needed. */
STATIC void
S_scan_commit(pTHX_ scan_data_t *data)
{
dTHR;
STRLEN l = CHR_SVLEN(data->last_found);
STRLEN old_l = CHR_SVLEN(*data->longest);
if ((l >= old_l) && ((l > old_l) || (data->flags & SF_BEFORE_EOL))) {
sv_setsv(*data->longest, data->last_found);
if (*data->longest == data->longest_fixed) {
data->offset_fixed = l ? data->last_start_min : data->pos_min;
if (data->flags & SF_BEFORE_EOL)
data->flags
|= ((data->flags & SF_BEFORE_EOL) << SF_FIX_SHIFT_EOL);
else
data->flags &= ~SF_FIX_BEFORE_EOL;
}
else {
data->offset_float_min = l ? data->last_start_min : data->pos_min;
data->offset_float_max = (l
? data->last_start_max
: data->pos_min + data->pos_delta);
if (data->flags & SF_BEFORE_EOL)
data->flags
|= ((data->flags & SF_BEFORE_EOL) << SF_FL_SHIFT_EOL);
else
data->flags &= ~SF_FL_BEFORE_EOL;
}
}
SvCUR_set(data->last_found, 0);
data->last_end = -1;
data->flags &= ~SF_BEFORE_EOL;
}
/* Can match anything (initialization) */
STATIC void
S_cl_anything(pTHX_ struct regnode_charclass_class *cl)
{
int value;
ANYOF_CLASS_ZERO(cl);
for (value = 0; value < 256; ++value)
ANYOF_BITMAP_SET(cl, value);
cl->flags = ANYOF_EOS;
if (LOC)
cl->flags |= ANYOF_LOCALE;
}
/* Can match anything (initialization) */
STATIC int
S_cl_is_anything(pTHX_ struct regnode_charclass_class *cl)
{
int value;
for (value = 0; value < ANYOF_MAX; value += 2)
if (ANYOF_CLASS_TEST(cl, value) && ANYOF_CLASS_TEST(cl, value + 1))
return 1;
for (value = 0; value < 256; ++value)
if (!ANYOF_BITMAP_TEST(cl, value))
return 0;
return 1;
}
/* Can match anything (initialization) */
STATIC void
S_cl_init(pTHX_ struct regnode_charclass_class *cl)
{
Zero(cl, 1, struct regnode_charclass_class);
cl->type = ANYOF;
cl_anything(cl);
}
STATIC void
S_cl_init_zero(pTHX_ struct regnode_charclass_class *cl)
{
Zero(cl, 1, struct regnode_charclass_class);
cl->type = ANYOF;
cl_anything(cl);
if (LOC)
cl->flags |= ANYOF_LOCALE;
}
/* 'And' a given class with another one. Can create false positives */
/* We assume that cl is not inverted */
STATIC void
S_cl_and(pTHX_ struct regnode_charclass_class *cl,
struct regnode_charclass_class *and_with)
{
if (!(and_with->flags & ANYOF_CLASS)
&& !(cl->flags & ANYOF_CLASS)
&& (and_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
&& !(and_with->flags & ANYOF_FOLD)
&& !(cl->flags & ANYOF_FOLD)) {
int i;
if (and_with->flags & ANYOF_INVERT)
for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
cl->bitmap[i] &= ~and_with->bitmap[i];
else
for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
cl->bitmap[i] &= and_with->bitmap[i];
} /* XXXX: logic is complicated otherwise, leave it along for a moment. */
if (!(and_with->flags & ANYOF_EOS))
cl->flags &= ~ANYOF_EOS;
}
/* 'OR' a given class with another one. Can create false positives */
/* We assume that cl is not inverted */
STATIC void
S_cl_or(pTHX_ struct regnode_charclass_class *cl, struct regnode_charclass_class *or_with)
{
if (or_with->flags & ANYOF_INVERT) {
/* We do not use
* (B1 | CL1) | (!B2 & !CL2) = (B1 | !B2 & !CL2) | (CL1 | (!B2 & !CL2))
* <= (B1 | !B2) | (CL1 | !CL2)
* which is wasteful if CL2 is small, but we ignore CL2:
* (B1 | CL1) | (!B2 & !CL2) <= (B1 | CL1) | !B2 = (B1 | !B2) | CL1
* XXXX Can we handle case-fold? Unclear:
* (OK1(i) | OK1(i')) | !(OK1(i) | OK1(i')) =
* (OK1(i) | OK1(i')) | (!OK1(i) & !OK1(i'))
*/
if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
&& !(or_with->flags & ANYOF_FOLD)
&& !(cl->flags & ANYOF_FOLD) ) {
int i;
for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
cl->bitmap[i] |= ~or_with->bitmap[i];
} /* XXXX: logic is complicated otherwise */
else {
cl_anything(cl);
}
} else {
/* (B1 | CL1) | (B2 | CL2) = (B1 | B2) | (CL1 | CL2)) */
if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
&& (!(or_with->flags & ANYOF_FOLD)
|| (cl->flags & ANYOF_FOLD)) ) {
int i;
/* OR char bitmap and class bitmap separately */
for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
cl->bitmap[i] |= or_with->bitmap[i];
if (or_with->flags & ANYOF_CLASS) {
for (i = 0; i < ANYOF_CLASSBITMAP_SIZE; i++)
cl->classflags[i] |= or_with->classflags[i];
cl->flags |= ANYOF_CLASS;
}
}
else { /* XXXX: logic is complicated, leave it along for a moment. */
cl_anything(cl);
}
}
if (or_with->flags & ANYOF_EOS)
cl->flags |= ANYOF_EOS;
}
/* REx optimizer. Converts nodes into quickier variants "in place".
Finds fixed substrings. */
/* Stops at toplevel WHILEM as well as at `last'. At end *scanp is set
to the position after last scanned or to NULL. */
STATIC I32
S_study_chunk(pTHX_ regnode **scanp, I32 *deltap, regnode *last, scan_data_t *data, U32 flags)
/* scanp: Start here (read-write). */
/* deltap: Write maxlen-minlen here. */
/* last: Stop before this one. */
{
dTHR;
I32 min = 0, pars = 0, code;
regnode *scan = *scanp, *next;
I32 delta = 0;
int is_inf = (flags & SCF_DO_SUBSTR) && (data->flags & SF_IS_INF);
int is_inf_internal = 0; /* The studied chunk is infinite */
I32 is_par = OP(scan) == OPEN ? ARG(scan) : 0;
scan_data_t data_fake;
struct regnode_charclass_class and_with; /* Valid if flags & SCF_DO_STCLASS_OR */
while (scan && OP(scan) != END && scan < last) {
/* Peephole optimizer: */
if (PL_regkind[(U8)OP(scan)] == EXACT) {
/* Merge several consecutive EXACTish nodes into one. */
regnode *n = regnext(scan);
U32 stringok = 1;
#ifdef DEBUGGING
regnode *stop = scan;
#endif
next = scan + NODE_SZ_STR(scan);
/* Skip NOTHING, merge EXACT*. */
while (n &&
( PL_regkind[(U8)OP(n)] == NOTHING ||
(stringok && (OP(n) == OP(scan))))
&& NEXT_OFF(n)
&& NEXT_OFF(scan) + NEXT_OFF(n) < I16_MAX) {
if (OP(n) == TAIL || n > next)
stringok = 0;
if (PL_regkind[(U8)OP(n)] == NOTHING) {
NEXT_OFF(scan) += NEXT_OFF(n);
next = n + NODE_STEP_REGNODE;
#ifdef DEBUGGING
if (stringok)
stop = n;
#endif
n = regnext(n);
}
else {
int oldl = STR_LEN(scan);
regnode *nnext = regnext(n);
if (oldl + STR_LEN(n) > U8_MAX)
break;
NEXT_OFF(scan) += NEXT_OFF(n);
STR_LEN(scan) += STR_LEN(n);
next = n + NODE_SZ_STR(n);
/* Now we can overwrite *n : */
Move(STRING(n), STRING(scan) + oldl,
STR_LEN(n), char);
#ifdef DEBUGGING
if (stringok)
stop = next - 1;
#endif
n = nnext;
}
}
#ifdef DEBUGGING
/* Allow dumping */
n = scan + NODE_SZ_STR(scan);
while (n <= stop) {
if (PL_regkind[(U8)OP(n)] != NOTHING || OP(n) == NOTHING) {
OP(n) = OPTIMIZED;
NEXT_OFF(n) = 0;
}
n++;
}
#endif
}
/* Follow the next-chain of the current node and optimize
away all the NOTHINGs from it. */
if (OP(scan) != CURLYX) {
int max = (reg_off_by_arg[OP(scan)]
? I32_MAX
/* I32 may be smaller than U16 on CRAYs! */
: (I32_MAX < U16_MAX ? I32_MAX : U16_MAX));
int off = (reg_off_by_arg[OP(scan)] ? ARG(scan) : NEXT_OFF(scan));
int noff;
regnode *n = scan;
/* Skip NOTHING and LONGJMP. */
while ((n = regnext(n))
&& ((PL_regkind[(U8)OP(n)] == NOTHING && (noff = NEXT_OFF(n)))
|| ((OP(n) == LONGJMP) && (noff = ARG(n))))
&& off + noff < max)
off += noff;
if (reg_off_by_arg[OP(scan)])
ARG(scan) = off;
else
NEXT_OFF(scan) = off;
}
/* 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) {
next = regnext(scan);
code = OP(scan);
if (OP(next) == code || code == IFTHEN || code == SUSPEND) {
I32 max1 = 0, min1 = I32_MAX, num = 0;
struct regnode_charclass_class accum;
if (flags & SCF_DO_SUBSTR) /* XXXX Add !SUSPEND? */
scan_commit(data); /* Cannot merge strings after this. */
if (flags & SCF_DO_STCLASS)
cl_init_zero(&accum);
while (OP(scan) == code) {
I32 deltanext, minnext, f = 0;
struct regnode_charclass_class this_class;
num++;
data_fake.flags = 0;
if (data)
data_fake.whilem_c = data->whilem_c;
next = regnext(scan);
scan = NEXTOPER(scan);
if (code != BRANCH)
scan = NEXTOPER(scan);
if (flags & SCF_DO_STCLASS) {
cl_init(&this_class);
data_fake.start_class = &this_class;
f = SCF_DO_STCLASS_AND;
}
/* we suppose the run is continuous, last=next...*/
minnext = study_chunk(&scan, &deltanext, next,
&data_fake, f);
if (min1 > minnext)
min1 = minnext;
if (max1 < minnext + deltanext)
max1 = minnext + deltanext;
if (deltanext == I32_MAX)
is_inf = is_inf_internal = 1;
scan = next;
if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
pars++;
if (data && (data_fake.flags & SF_HAS_EVAL))
data->flags |= SF_HAS_EVAL;
if (data)
data->whilem_c = data_fake.whilem_c;
if (flags & SCF_DO_STCLASS)
cl_or(&accum, &this_class);
if (code == SUSPEND)
break;
}
if (code == IFTHEN && num < 2) /* Empty ELSE branch */
min1 = 0;
if (flags & SCF_DO_SUBSTR) {
data->pos_min += min1;
data->pos_delta += max1 - min1;
if (max1 != min1 || is_inf)
data->longest = &(data->longest_float);
}
min += min1;
delta += max1 - min1;
if (flags & SCF_DO_STCLASS_OR) {
cl_or(data->start_class, &accum);
if (min1) {
cl_and(data->start_class, &and_with);
flags &= ~SCF_DO_STCLASS;
}
}
else if (flags & SCF_DO_STCLASS_AND) {
if (min1) {
cl_and(data->start_class, &accum);
flags &= ~SCF_DO_STCLASS;
}
else {
/* Switch to OR mode: cache the old value of
* data->start_class */
StructCopy(data->start_class, &and_with,
struct regnode_charclass_class);
flags &= ~SCF_DO_STCLASS_AND;
StructCopy(&accum, data->start_class,
struct regnode_charclass_class);
flags |= SCF_DO_STCLASS_OR;
data->start_class->flags |= ANYOF_EOS;
}
}
}
else if (code == BRANCHJ) /* single branch is optimized. */
scan = NEXTOPER(NEXTOPER(scan));
else /* single branch is optimized. */
scan = NEXTOPER(scan);
continue;
}
else if (OP(scan) == EXACT) {
I32 l = STR_LEN(scan);
if (UTF) {
unsigned char *s = (unsigned char *)STRING(scan);
unsigned char *e = s + l;
I32 newl = 0;
while (s < e) {
newl++;
s += UTF8SKIP(s);
}
l = newl;
}
min += l;
if (flags & SCF_DO_SUBSTR) { /* Update longest substr. */
/* The code below prefers earlier match for fixed
offset, later match for variable offset. */
if (data->last_end == -1) { /* Update the start info. */
data->last_start_min = data->pos_min;
data->last_start_max = is_inf
? I32_MAX : data->pos_min + data->pos_delta;
}
sv_catpvn(data->last_found, STRING(scan), STR_LEN(scan));
data->last_end = data->pos_min + l;
data->pos_min += l; /* As in the first entry. */
data->flags &= ~SF_BEFORE_EOL;
}
if (flags & SCF_DO_STCLASS_AND) {
/* Check whether it is compatible with what we know already! */
int compat = 1;
if (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE))
&& !ANYOF_BITMAP_TEST(data->start_class, *STRING(scan))
&& (!(data->start_class->flags & ANYOF_FOLD)
|| !ANYOF_BITMAP_TEST(data->start_class,
PL_fold[*(U8*)STRING(scan)])))
compat = 0;
ANYOF_CLASS_ZERO(data->start_class);
ANYOF_BITMAP_ZERO(data->start_class);
if (compat)
ANYOF_BITMAP_SET(data->start_class, *STRING(scan));
data->start_class->flags &= ~ANYOF_EOS;
}
else if (flags & SCF_DO_STCLASS_OR) {
/* false positive possible if the class is case-folded */
ANYOF_BITMAP_SET(data->start_class, *STRING(scan));
data->start_class->flags &= ~ANYOF_EOS;
cl_and(data->start_class, &and_with);
}
flags &= ~SCF_DO_STCLASS;
}
else if (PL_regkind[(U8)OP(scan)] == EXACT) { /* But OP != EXACT! */
I32 l = STR_LEN(scan);
/* Search for fixed substrings supports EXACT only. */
if (flags & SCF_DO_SUBSTR)
scan_commit(data);
if (UTF) {
unsigned char *s = (unsigned char *)STRING(scan);
unsigned char *e = s + l;
I32 newl = 0;
while (s < e) {
newl++;
s += UTF8SKIP(s);
}
l = newl;
}
min += l;
if (data && (flags & SCF_DO_SUBSTR))
data->pos_min += l;
if (flags & SCF_DO_STCLASS_AND) {
/* Check whether it is compatible with what we know already! */
int compat = 1;
if (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE))
&& !ANYOF_BITMAP_TEST(data->start_class, *STRING(scan))
&& !ANYOF_BITMAP_TEST(data->start_class,
PL_fold[*(U8*)STRING(scan)]))
compat = 0;
ANYOF_CLASS_ZERO(data->start_class);
ANYOF_BITMAP_ZERO(data->start_class);
if (compat) {
ANYOF_BITMAP_SET(data->start_class, *STRING(scan));
data->start_class->flags &= ~ANYOF_EOS;
data->start_class->flags |= ANYOF_FOLD;
if (OP(scan) == EXACTFL)
data->start_class->flags |= ANYOF_LOCALE;
}
}
else if (flags & SCF_DO_STCLASS_OR) {
if (data->start_class->flags & ANYOF_FOLD) {
/* false positive possible if the class is case-folded.
Assume that the locale settings are the same... */
ANYOF_BITMAP_SET(data->start_class, *STRING(scan));
data->start_class->flags &= ~ANYOF_EOS;
}
cl_and(data->start_class, &and_with);
}
flags &= ~SCF_DO_STCLASS;
}
else if (strchr((char*)PL_varies,OP(scan))) {
I32 mincount, maxcount, minnext, deltanext, pos_before, fl;
I32 f = flags;
regnode *oscan = scan;
struct regnode_charclass_class this_class;
struct regnode_charclass_class *oclass = NULL;
switch (PL_regkind[(U8)OP(scan)]) {
case WHILEM: /* End of (?:...)* . */
scan = NEXTOPER(scan);
goto finish;
case PLUS:
if (flags & (SCF_DO_SUBSTR | SCF_DO_STCLASS)) {
next = NEXTOPER(scan);
if (OP(next) == EXACT || (flags & SCF_DO_STCLASS)) {
mincount = 1;
maxcount = REG_INFTY;
next = regnext(scan);
scan = NEXTOPER(scan);
goto do_curly;
}
}
if (flags & SCF_DO_SUBSTR)
data->pos_min++;
min++;
/* Fall through. */
case STAR:
if (flags & SCF_DO_STCLASS) {
mincount = 0;
maxcount = REG_INFTY;
next = regnext(scan);
scan = NEXTOPER(scan);
goto do_curly;
}
is_inf = is_inf_internal = 1;
scan = regnext(scan);
if (flags & SCF_DO_SUBSTR) {
scan_commit(data); /* Cannot extend fixed substrings */
data->longest = &(data->longest_float);
}
goto optimize_curly_tail;
case CURLY:
mincount = ARG1(scan);
maxcount = ARG2(scan);
next = regnext(scan);
scan = NEXTOPER(scan) + EXTRA_STEP_2ARGS;
do_curly:
if (flags & SCF_DO_SUBSTR) {
if (mincount == 0) scan_commit(data); /* Cannot extend fixed substrings */
pos_before = data->pos_min;
}
if (data) {
fl = data->flags;
data->flags &= ~(SF_HAS_PAR|SF_IN_PAR|SF_HAS_EVAL);
if (is_inf)
data->flags |= SF_IS_INF;
}
if (flags & SCF_DO_STCLASS) {
cl_init(&this_class);
oclass = data->start_class;
data->start_class = &this_class;
f |= SCF_DO_STCLASS_AND;
f &= ~SCF_DO_STCLASS_OR;
}
/* This will finish on WHILEM, setting scan, or on NULL: */
minnext = study_chunk(&scan, &deltanext, last, data,
mincount == 0
? (f & ~SCF_DO_SUBSTR) : f);
if (flags & SCF_DO_STCLASS)
data->start_class = oclass;
if (mincount == 0 || minnext == 0) {
if (flags & SCF_DO_STCLASS_OR) {
cl_or(data->start_class, &this_class);
}
else if (flags & SCF_DO_STCLASS_AND) {
/* Switch to OR mode: cache the old value of
* data->start_class */
StructCopy(data->start_class, &and_with,
struct regnode_charclass_class);
flags &= ~SCF_DO_STCLASS_AND;
StructCopy(&this_class, data->start_class,
struct regnode_charclass_class);
flags |= SCF_DO_STCLASS_OR;
data->start_class->flags |= ANYOF_EOS;
}
} else { /* Non-zero len */
if (flags & SCF_DO_STCLASS_OR) {
cl_or(data->start_class, &this_class);
cl_and(data->start_class, &and_with);
}
else if (flags & SCF_DO_STCLASS_AND)
cl_and(data->start_class, &this_class);
flags &= ~SCF_DO_STCLASS;
}
if (!scan) /* It was not CURLYX, but CURLY. */
scan = next;
if (ckWARN(WARN_REGEXP) && (minnext + deltanext == 0)
&& !(data->flags & (SF_HAS_PAR|SF_IN_PAR))
&& maxcount <= REG_INFTY/3) /* Complement check for big count */
Perl_warner(aTHX_ WARN_REGEXP,
"Strange *+?{} on zero-length expression");
min += minnext * mincount;
is_inf_internal |= ((maxcount == REG_INFTY
&& (minnext + deltanext) > 0)
|| deltanext == I32_MAX);
is_inf |= is_inf_internal;
delta += (minnext + deltanext) * maxcount - minnext * mincount;
/* Try powerful optimization CURLYX => CURLYN. */
if ( OP(oscan) == CURLYX && data
&& data->flags & SF_IN_PAR
&& !(data->flags & SF_HAS_EVAL)
&& !deltanext && minnext == 1 ) {
/* Try to optimize to CURLYN. */
regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS;
regnode *nxt1 = nxt, *nxt2;
/* Skip open. */
nxt = regnext(nxt);
if (!strchr((char*)PL_simple,OP(nxt))
&& !(PL_regkind[(U8)OP(nxt)] == EXACT
&& STR_LEN(nxt) == 1))
goto nogo;
nxt2 = nxt;
nxt = regnext(nxt);
if (OP(nxt) != CLOSE)
goto nogo;
/* Now we know that nxt2 is the only contents: */
oscan->flags = ARG(nxt);
OP(oscan) = CURLYN;
OP(nxt1) = NOTHING; /* was OPEN. */
#ifdef DEBUGGING
OP(nxt1 + 1) = OPTIMIZED; /* was count. */
NEXT_OFF(nxt1+ 1) = 0; /* just for consistancy. */
NEXT_OFF(nxt2) = 0; /* just for consistancy with CURLY. */
OP(nxt) = OPTIMIZED; /* was CLOSE. */
OP(nxt + 1) = OPTIMIZED; /* was count. */
NEXT_OFF(nxt+ 1) = 0; /* just for consistancy. */
#endif
}
nogo:
/* Try optimization CURLYX => CURLYM. */
if ( OP(oscan) == CURLYX && data
&& !(data->flags & SF_HAS_PAR)
&& !(data->flags & SF_HAS_EVAL)
&& !deltanext ) {
/* XXXX How to optimize if data == 0? */
/* Optimize to a simpler form. */
regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN */
regnode *nxt2;
OP(oscan) = CURLYM;
while ( (nxt2 = regnext(nxt)) /* skip over embedded stuff*/
&& (OP(nxt2) != WHILEM))
nxt = nxt2;
OP(nxt2) = SUCCEED; /* Whas WHILEM */
/* Need to optimize away parenths. */
if (data->flags & SF_IN_PAR) {
/* Set the parenth number. */
regnode *nxt1 = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN*/
if (OP(nxt) != CLOSE)
FAIL("panic opt close");
oscan->flags = ARG(nxt);
OP(nxt1) = OPTIMIZED; /* was OPEN. */
OP(nxt) = OPTIMIZED; /* was CLOSE. */
#ifdef DEBUGGING
OP(nxt1 + 1) = OPTIMIZED; /* was count. */
OP(nxt + 1) = OPTIMIZED; /* was count. */
NEXT_OFF(nxt1 + 1) = 0; /* just for consistancy. */
NEXT_OFF(nxt + 1) = 0; /* just for consistancy. */
#endif
#if 0
while ( nxt1 && (OP(nxt1) != WHILEM)) {
regnode *nnxt = regnext(nxt1);
if (nnxt == nxt) {
if (reg_off_by_arg[OP(nxt1)])
ARG_SET(nxt1, nxt2 - nxt1);
else if (nxt2 - nxt1 < U16_MAX)
NEXT_OFF(nxt1) = nxt2 - nxt1;
else
OP(nxt) = NOTHING; /* Cannot beautify */
}
nxt1 = nnxt;
}
#endif
/* Optimize again: */
study_chunk(&nxt1, &deltanext, nxt, NULL, 0);
}
else
oscan->flags = 0;
}
else if (OP(oscan) == CURLYX && data && ++data->whilem_c < 16) {
/* This stays as CURLYX, and can put the count/of pair. */
/* Find WHILEM (as in regexec.c) */
regnode *nxt = oscan + NEXT_OFF(oscan);
if (OP(PREVOPER(nxt)) == NOTHING) /* LONGJMP */
nxt += ARG(nxt);
PREVOPER(nxt)->flags = data->whilem_c
| (PL_reg_whilem_seen << 4); /* On WHILEM */
}
if (data && fl & (SF_HAS_PAR|SF_IN_PAR))
pars++;
if (flags & SCF_DO_SUBSTR) {
SV *last_str = Nullsv;
int counted = mincount != 0;
if (data->last_end > 0 && mincount != 0) { /* Ends with a string. */
I32 b = pos_before >= data->last_start_min
? pos_before : data->last_start_min;
STRLEN l;
char *s = SvPV(data->last_found, l);
I32 old = b - data->last_start_min;
if (UTF)
old = utf8_hop((U8*)s, old) - (U8*)s;
l -= old;
/* Get the added string: */
last_str = newSVpvn(s + old, l);
if (deltanext == 0 && pos_before == b) {
/* What was added is a constant string */
if (mincount > 1) {
SvGROW(last_str, (mincount * l) + 1);
repeatcpy(SvPVX(last_str) + l,
SvPVX(last_str), l, mincount - 1);
SvCUR(last_str) *= mincount;
/* Add additional parts. */
SvCUR_set(data->last_found,
SvCUR(data->last_found) - l);
sv_catsv(data->last_found, last_str);
data->last_end += l * (mincount - 1);
}
}
}
/* It is counted once already... */
data->pos_min += minnext * (mincount - counted);
data->pos_delta += - counted * deltanext +
(minnext + deltanext) * maxcount - minnext * mincount;
if (mincount != maxcount) {
/* Cannot extend fixed substrings found inside
the group. */
scan_commit(data);
if (mincount && last_str) {
sv_setsv(data->last_found, last_str);
data->last_end = data->pos_min;
data->last_start_min =
data->pos_min - CHR_SVLEN(last_str);
data->last_start_max = is_inf
? I32_MAX
: data->pos_min + data->pos_delta
- CHR_SVLEN(last_str);
}
data->longest = &(data->longest_float);
}
SvREFCNT_dec(last_str);
}
if (data && (fl & SF_HAS_EVAL))
data->flags |= SF_HAS_EVAL;
optimize_curly_tail:
if (OP(oscan) != CURLYX) {
while (PL_regkind[(U8)OP(next = regnext(oscan))] == NOTHING
&& NEXT_OFF(next))
NEXT_OFF(oscan) += NEXT_OFF(next);
}
continue;
default: /* REF and CLUMP only? */
if (flags & SCF_DO_SUBSTR) {
scan_commit(data); /* Cannot expect anything... */
data->longest = &(data->longest_float);
}
is_inf = is_inf_internal = 1;
if (flags & SCF_DO_STCLASS_OR)
cl_anything(data->start_class);
flags &= ~SCF_DO_STCLASS;
break;
}
}
else if (strchr((char*)PL_simple,OP(scan)) || PL_regkind[(U8)OP(scan)] == ANYUTF8) {
int value;
if (flags & SCF_DO_SUBSTR) {
scan_commit(data);
data->pos_min++;
}
min++;
if (flags & SCF_DO_STCLASS) {
data->start_class->flags &= ~ANYOF_EOS; /* No match on empty */
/* Some of the logic below assumes that switching
locale on will only add false positives. */
switch (PL_regkind[(U8)OP(scan)]) {
case ANYUTF8:
case SANY:
case SANYUTF8:
case ALNUMUTF8:
case ANYOFUTF8:
case ALNUMLUTF8:
case NALNUMUTF8:
case NALNUMLUTF8:
case SPACEUTF8:
case NSPACEUTF8:
case SPACELUTF8:
case NSPACELUTF8:
case DIGITUTF8:
case NDIGITUTF8:
default:
do_default:
/* Perl_croak(aTHX_ "panic: unexpected simple REx opcode %d", OP(scan)); */
if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
cl_anything(data->start_class);
break;
case REG_ANY:
if (OP(scan) == SANY)
goto do_default;
if (flags & SCF_DO_STCLASS_OR) { /* Everything but \n */
value = (ANYOF_BITMAP_TEST(data->start_class,'\n')
|| (data->start_class->flags & ANYOF_CLASS));
cl_anything(data->start_class);
}
if (flags & SCF_DO_STCLASS_AND || !value)
ANYOF_BITMAP_CLEAR(data->start_class,'\n');
break;
case ANYOF:
if (flags & SCF_DO_STCLASS_AND)
cl_and(data->start_class,
(struct regnode_charclass_class*)scan);
else
cl_or(data->start_class,
(struct regnode_charclass_class*)scan);
break;
case ALNUM:
if (flags & SCF_DO_STCLASS_AND) {
if (!(data->start_class->flags & ANYOF_LOCALE)) {
ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM);
for (value = 0; value < 256; value++)
if (!isALNUM(value))
ANYOF_BITMAP_CLEAR(data->start_class, value);
}
}
else {
if (data->start_class->flags & ANYOF_LOCALE)
ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM);
else {
for (value = 0; value < 256; value++)
if (isALNUM(value))
ANYOF_BITMAP_SET(data->start_class, value);
}
}
break;
case ALNUML:
if (flags & SCF_DO_STCLASS_AND) {
if (data->start_class->flags & ANYOF_LOCALE)
ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM);
}
else {
ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM);
data->start_class->flags |= ANYOF_LOCALE;
}
break;
case NALNUM:
if (flags & SCF_DO_STCLASS_AND) {
if (!(data->start_class->flags & ANYOF_LOCALE)) {
ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM);
for (value = 0; value < 256; value++)
if (isALNUM(value))
ANYOF_BITMAP_CLEAR(data->start_class, value);
}
}
else {
if (data->start_class->flags & ANYOF_LOCALE)
ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM);
else {
for (value = 0; value < 256; value++)
if (!isALNUM(value))
ANYOF_BITMAP_SET(data->start_class, value);
}
}
break;
case NALNUML:
if (flags & SCF_DO_STCLASS_AND) {
if (data->start_class->flags & ANYOF_LOCALE)
ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM);
}
else {
data->start_class->flags |= ANYOF_LOCALE;
ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM);
}
break;
case SPACE:
if (flags & SCF_DO_STCLASS_AND) {
if (!(data->start_class->flags & ANYOF_LOCALE)) {
ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE);
for (value = 0; value < 256; value++)
if (!isSPACE(value))
ANYOF_BITMAP_CLEAR(data->start_class, value);
}
}
else {
if (data->start_class->flags & ANYOF_LOCALE)
ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE);
else {
for (value = 0; value < 256; value++)
if (isSPACE(value))
ANYOF_BITMAP_SET(data->start_class, value);
}
}
break;
case SPACEL:
if (flags & SCF_DO_STCLASS_AND) {
if (data->start_class->flags & ANYOF_LOCALE)
ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE);
}
else {
data->start_class->flags |= ANYOF_LOCALE;
ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE);
}
break;
case NSPACE:
if (flags & SCF_DO_STCLASS_AND) {
if (!(data->start_class->flags & ANYOF_LOCALE)) {
ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE);
for (value = 0; value < 256; value++)
if (isSPACE(value))
ANYOF_BITMAP_CLEAR(data->start_class, value);
}
}
else {
if (data->start_class->flags & ANYOF_LOCALE)
ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE);
else {
for (value = 0; value < 256; value++)
if (!isSPACE(value))
ANYOF_BITMAP_SET(data->start_class, value);
}
}
break;
case NSPACEL:
if (flags & SCF_DO_STCLASS_AND) {
if (data->start_class->flags & ANYOF_LOCALE) {
ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE);
for (value = 0; value < 256; value++)
if (!isSPACE(value))
ANYOF_BITMAP_CLEAR(data->start_class, value);
}
}
else {
data->start_class->flags |= ANYOF_LOCALE;
ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE);
}
break;
case DIGIT:
if (flags & SCF_DO_STCLASS_AND) {
ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NDIGIT);
for (value = 0; value < 256; value++)
if (!isDIGIT(value))
ANYOF_BITMAP_CLEAR(data->start_class, value);
}
else {
if (data->start_class->flags & ANYOF_LOCALE)
ANYOF_CLASS_SET(data->start_class,ANYOF_DIGIT);
else {
for (value = 0; value < 256; value++)
if (isDIGIT(value))
ANYOF_BITMAP_SET(data->start_class, value);
}
}
break;
case NDIGIT:
if (flags & SCF_DO_STCLASS_AND) {
ANYOF_CLASS_CLEAR(data->start_class,ANYOF_DIGIT);
for (value = 0; value < 256; value++)
if (isDIGIT(value))
ANYOF_BITMAP_CLEAR(data->start_class, value);
}
else {
if (data->start_class->flags & ANYOF_LOCALE)
ANYOF_CLASS_SET(data->start_class,ANYOF_NDIGIT);
else {
for (value = 0; value < 256; value++)
if (!isDIGIT(value))
ANYOF_BITMAP_SET(data->start_class, value);
}
}
break;
}
if (flags & SCF_DO_STCLASS_OR)
cl_and(data->start_class, &and_with);
flags &= ~SCF_DO_STCLASS;
}
}
else if (PL_regkind[(U8)OP(scan)] == EOL && flags & SCF_DO_SUBSTR) {
data->flags |= (OP(scan) == MEOL
? SF_BEFORE_MEOL
: SF_BEFORE_SEOL);
}
else if ( PL_regkind[(U8)OP(scan)] == BRANCHJ
/* Lookbehind, or need to calculate parens/evals/stclass: */
&& (scan->flags || data || (flags & SCF_DO_STCLASS))
&& (OP(scan) == IFMATCH || OP(scan) == UNLESSM)) {
/* Lookahead/lookbehind */
I32 deltanext, minnext;
regnode *nscan;
struct regnode_charclass_class intrnl;
int f = 0;
data_fake.flags = 0;
if (data)
data_fake.whilem_c = data->whilem_c;
if ( flags & SCF_DO_STCLASS && !scan->flags
&& OP(scan) == IFMATCH ) { /* Lookahead */
cl_init(&intrnl);
data_fake.start_class = &intrnl;
f = SCF_DO_STCLASS_AND;
}
next = regnext(scan);
nscan = NEXTOPER(NEXTOPER(scan));
minnext = study_chunk(&nscan, &deltanext, last, &data_fake, f);
if (scan->flags) {
if (deltanext) {
FAIL("variable length lookbehind not implemented");
}
else if (minnext > U8_MAX) {
FAIL2("lookbehind longer than %"UVuf" not implemented", (UV)U8_MAX);
}
scan->flags = minnext;
}
if (data && data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
pars++;
if (data && (data_fake.flags & SF_HAS_EVAL))
data->flags |= SF_HAS_EVAL;
if (data)
data->whilem_c = data_fake.whilem_c;
if (f) {
int was = (data->start_class->flags & ANYOF_EOS);
cl_and(data->start_class, &intrnl);
if (was)
data->start_class->flags |= ANYOF_EOS;
}
}
else if (OP(scan) == OPEN) {
pars++;
}
else if (OP(scan) == CLOSE && ARG(scan) == is_par) {
next = regnext(scan);
if ( next && (OP(next) != WHILEM) && next < last)
is_par = 0; /* Disable optimization */
}
else if (OP(scan) == EVAL) {
if (data)
data->flags |= SF_HAS_EVAL;
}
else if (OP(scan) == LOGICAL && scan->flags == 2) { /* Embedded follows */
if (flags & SCF_DO_SUBSTR) {
scan_commit(data);
data->longest = &(data->longest_float);
}
is_inf = is_inf_internal = 1;
if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
cl_anything(data->start_class);
flags &= ~SCF_DO_STCLASS;
}
/* Else: zero-length, ignore. */
scan = regnext(scan);
}
finish:
*scanp = scan;
*deltap = is_inf_internal ? I32_MAX : delta;
if (flags & SCF_DO_SUBSTR && is_inf)
data->pos_delta = I32_MAX - data->pos_min;
if (is_par > U8_MAX)
is_par = 0;
if (is_par && pars==1 && data) {
data->flags |= SF_IN_PAR;
data->flags &= ~SF_HAS_PAR;
}
else if (pars && data) {
data->flags |= SF_HAS_PAR;
data->flags &= ~SF_IN_PAR;
}
if (flags & SCF_DO_STCLASS_OR)
cl_and(data->start_class, &and_with);
return min;
}
STATIC I32
S_add_data(pTHX_ I32 n, char *s)
{
dTHR;
if (PL_regcomp_rx->data) {
Renewc(PL_regcomp_rx->data,
sizeof(*PL_regcomp_rx->data) + sizeof(void*) * (PL_regcomp_rx->data->count + n - 1),
char, struct reg_data);
Renew(PL_regcomp_rx->data->what, PL_regcomp_rx->data->count + n, U8);
PL_regcomp_rx->data->count += n;
}
else {
Newc(1207, PL_regcomp_rx->data, sizeof(*PL_regcomp_rx->data) + sizeof(void*) * (n - 1),
char, struct reg_data);
New(1208, PL_regcomp_rx->data->what, n, U8);
PL_regcomp_rx->data->count = n;
}
Copy(s, PL_regcomp_rx->data->what + PL_regcomp_rx->data->count - n, n, U8);
return PL_regcomp_rx->data->count - n;
}
void
Perl_reginitcolors(pTHX)
{
dTHR;
int i = 0;
char *s = PerlEnv_getenv("PERL_RE_COLORS");
if (s) {
PL_colors[0] = s = savepv(s);
while (++i < 6) {
s = strchr(s, '\t');
if (s) {
*s = '\0';
PL_colors[i] = ++s;
}
else
PL_colors[i] = s = "";
}
} else {
while (i < 6)
PL_colors[i++] = "";
}
PL_colorset = 1;
}
/*
- pregcomp - compile a regular expression into internal code
*
* We can't allocate space until we know how big the compiled form will be,
* but we can't compile it (and thus know how big it is) until we've got a
* place to put the code. So we cheat: we compile it twice, once with code
* generation turned off and size counting turned on, and once "for real".
* This also means that we don't allocate space until we are sure that the
* thing really will compile successfully, and we never have to move the
* code and thus invalidate pointers into it. (Note that it has to be in
* one piece because free() must be able to free it all.) [NB: not true in perl]
*
* Beware that the optimization-preparation code in here knows about some
* of the structure of the compiled regexp. [I'll say.]
*/
regexp *
Perl_pregcomp(pTHX_ char *exp, char *xend, PMOP *pm)
{
dTHR;
register regexp *r;
regnode *scan;
regnode *first;
I32 flags;
I32 minlen = 0;
I32 sawplus = 0;
I32 sawopen = 0;
scan_data_t data;
if (exp == NULL)
FAIL("NULL regexp argument");
if (pm->op_pmdynflags & PMdf_UTF8) {
PL_reg_flags |= RF_utf8;
}
else
PL_reg_flags = 0;
PL_regprecomp = savepvn(exp, xend - exp);
DEBUG_r(if (!PL_colorset) reginitcolors());
DEBUG_r(PerlIO_printf(Perl_debug_log, "%sCompiling REx%s `%s%*s%s'\n",
PL_colors[4],PL_colors[5],PL_colors[0],
(int)(xend - exp), PL_regprecomp, PL_colors[1]));
PL_regflags = pm->op_pmflags;
PL_regsawback = 0;
PL_regseen = 0;
PL_seen_zerolen = *exp == '^' ? -1 : 0;
PL_seen_evals = 0;
PL_extralen = 0;
/* First pass: determine size, legality. */
PL_regcomp_parse = exp;
PL_regxend = xend;
PL_regnaughty = 0;
PL_regnpar = 1;
PL_regsize = 0L;
PL_regcode = &PL_regdummy;
PL_reg_whilem_seen = 0;
#if 0 /* REGC() is (currently) a NOP at the first pass.
* Clever compilers notice this and complain. --jhi */
REGC((U8)REG_MAGIC, (char*)PL_regcode);
#endif
if (reg(0, &flags) == NULL) {
Safefree(PL_regprecomp);
PL_regprecomp = Nullch;
return(NULL);
}
DEBUG_r(PerlIO_printf(Perl_debug_log, "size %"IVdf" ", (IV)PL_regsize));
/* Small enough for pointer-storage convention?
If extralen==0, this means that we will not need long jumps. */
if (PL_regsize >= 0x10000L && PL_extralen)
PL_regsize += PL_extralen;
else
PL_extralen = 0;
if (PL_reg_whilem_seen > 15)
PL_reg_whilem_seen = 15;
/* Allocate space and initialize. */
Newc(1001, r, sizeof(regexp) + (unsigned)PL_regsize * sizeof(regnode),
char, regexp);
if (r == NULL)
FAIL("regexp out of space");
#ifdef DEBUGGING
/* avoid reading uninitialized memory in DEBUGGING code in study_chunk() */
Zero(r, sizeof(regexp) + (unsigned)PL_regsize * sizeof(regnode), char);
#endif
r->refcnt = 1;
r->prelen = xend - exp;
r->precomp = PL_regprecomp;
r->subbeg = NULL;
r->reganch = pm->op_pmflags & PMf_COMPILETIME;
r->nparens = PL_regnpar - 1; /* set early to validate backrefs */
r->substrs = 0; /* Useful during FAIL. */
r->startp = 0; /* Useful during FAIL. */
r->endp = 0; /* Useful during FAIL. */
PL_regcomp_rx = r;
/* Second pass: emit code. */
PL_regcomp_parse = exp;
PL_regxend = xend;
PL_regnaughty = 0;
PL_regnpar = 1;
PL_regcode = r->program;
/* Store the count of eval-groups for security checks: */
PL_regcode->next_off = ((PL_seen_evals > U16_MAX) ? U16_MAX : PL_seen_evals);
REGC((U8)REG_MAGIC, (char*) PL_regcode++);
r->data = 0;
if (reg(0, &flags) == NULL)
return(NULL);
/* Dig out information for optimizations. */
r->reganch = pm->op_pmflags & PMf_COMPILETIME; /* Again? */
pm->op_pmflags = PL_regflags;
if (UTF)
r->reganch |= ROPT_UTF8;
r->regstclass = NULL;
if (PL_regnaughty >= 10) /* Probably an expensive pattern. */
r->reganch |= ROPT_NAUGHTY;
scan = r->program + 1; /* First BRANCH. */
/* XXXX To minimize changes to RE engine we always allocate
3-units-long substrs field. */
Newz(1004, r->substrs, 1, struct reg_substr_data);
StructCopy(&zero_scan_data, &data, scan_data_t);
/* XXXX Should not we check for something else? Usually it is OPEN1... */
if (OP(scan) != BRANCH) { /* Only one top-level choice. */
I32 fake;
STRLEN longest_float_length, longest_fixed_length;
struct regnode_charclass_class ch_class;
int stclass_flag;
first = scan;
/* Skip introductions and multiplicators >= 1. */
while ((OP(first) == OPEN && (sawopen = 1)) ||
/* An OR of *one* alternative - should not happen now. */
(OP(first) == BRANCH && OP(regnext(first)) != BRANCH) ||
(OP(first) == PLUS) ||
(OP(first) == MINMOD) ||
/* An {n,m} with n>0 */
(PL_regkind[(U8)OP(first)] == CURLY && ARG1(first) > 0) ) {
if (OP(first) == PLUS)
sawplus = 1;
else
first += regarglen[(U8)OP(first)];
first = NEXTOPER(first);
}
/* Starting-point info. */
again:
if (PL_regkind[(U8)OP(first)] == EXACT) {
if (OP(first) == EXACT); /* Empty, get anchored substr later. */
else if ((OP(first) == EXACTF || OP(first) == EXACTFL)
&& !UTF)
r->regstclass = first;
}
else if (strchr((char*)PL_simple,OP(first)))
r->regstclass = first;
else if (PL_regkind[(U8)OP(first)] == BOUND ||
PL_regkind[(U8)OP(first)] == NBOUND)
r->regstclass = first;
else if (PL_regkind[(U8)OP(first)] == BOL) {
r->reganch |= (OP(first) == MBOL
? ROPT_ANCH_MBOL
: (OP(first) == SBOL
? ROPT_ANCH_SBOL
: ROPT_ANCH_BOL));
first = NEXTOPER(first);
goto again;
}
else if (OP(first) == GPOS) {
r->reganch |= ROPT_ANCH_GPOS;
first = NEXTOPER(first);
goto again;
}
else if ((OP(first) == STAR &&
PL_regkind[(U8)OP(NEXTOPER(first))] == REG_ANY) &&
!(r->reganch & ROPT_ANCH) )
{
/* turn .* into ^.* with an implied $*=1 */
int type = OP(NEXTOPER(first));
if (type == REG_ANY || type == ANYUTF8)
type = ROPT_ANCH_MBOL;
else
type = ROPT_ANCH_SBOL;
r->reganch |= type | ROPT_IMPLICIT;
first = NEXTOPER(first);
goto again;
}
if (sawplus && (!sawopen || !PL_regsawback)
&& !(PL_regseen & REG_SEEN_EVAL)) /* May examine pos and $& */
/* x+ must match at the 1st pos of run of x's */
r->reganch |= ROPT_SKIP;
/* Scan is after the zeroth branch, first is atomic matcher. */
DEBUG_r(PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n",
(IV)(first - scan + 1)));
/*
* If there's something expensive in the r.e., find the
* longest literal string that must appear and make it the
* regmust. Resolve ties in favor of later strings, since
* the regstart check works with the beginning of the r.e.
* and avoiding duplication strengthens checking. Not a
* strong reason, but sufficient in the absence of others.
* [Now we resolve ties in favor of the earlier string if
* 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 = newSVpvn("",0);
data.longest_float = newSVpvn("",0);
data.last_found = newSVpvn("",0);
data.longest = &(data.longest_fixed);
first = scan;
if (!r->regstclass) {
cl_init(&ch_class);
data.start_class = &ch_class;
stclass_flag = SCF_DO_STCLASS_AND;
} else /* XXXX Check for BOUND? */
stclass_flag = 0;
minlen = study_chunk(&first, &fake, scan + PL_regsize, /* Up to end */
&data, SCF_DO_SUBSTR | stclass_flag);
if ( PL_regnpar == 1 && data.longest == &(data.longest_fixed)
&& data.last_start_min == 0 && data.last_end > 0
&& !PL_seen_zerolen
&& (!(PL_regseen & REG_SEEN_GPOS) || (r->reganch & ROPT_ANCH_GPOS)))
r->reganch |= ROPT_CHECK_ALL;
scan_commit(&data);
SvREFCNT_dec(data.last_found);
longest_float_length = CHR_SVLEN(data.longest_float);
if (longest_float_length
|| (data.flags & SF_FL_BEFORE_EOL
&& (!(data.flags & SF_FL_BEFORE_MEOL)
|| (PL_regflags & PMf_MULTILINE)))) {
int t;
if (SvCUR(data.longest_fixed) /* ok to leave SvCUR */
&& data.offset_fixed == data.offset_float_min
&& SvCUR(data.longest_fixed) == SvCUR(data.longest_float))
goto remove_float; /* As in (a)+. */
r->float_substr = data.longest_float;
r->float_min_offset = data.offset_float_min;
r->float_max_offset = data.offset_float_max;
t = (data.flags & SF_FL_BEFORE_EOL /* Can't have SEOL and MULTI */
&& (!(data.flags & SF_FL_BEFORE_MEOL)
|| (PL_regflags & PMf_MULTILINE)));
fbm_compile(r->float_substr, t ? FBMcf_TAIL : 0);
}
else {
remove_float:
r->float_substr = Nullsv;
SvREFCNT_dec(data.longest_float);
longest_float_length = 0;
}
longest_fixed_length = CHR_SVLEN(data.longest_fixed);
if (longest_fixed_length
|| (data.flags & SF_FIX_BEFORE_EOL /* Cannot have SEOL and MULTI */
&& (!(data.flags & SF_FIX_BEFORE_MEOL)
|| (PL_regflags & PMf_MULTILINE)))) {
int t;
r->anchored_substr = data.longest_fixed;
r->anchored_offset = data.offset_fixed;
t = (data.flags & SF_FIX_BEFORE_EOL /* Can't have SEOL and MULTI */
&& (!(data.flags & SF_FIX_BEFORE_MEOL)
|| (PL_regflags & PMf_MULTILINE)));
fbm_compile(r->anchored_substr, t ? FBMcf_TAIL : 0);
}
else {
r->anchored_substr = Nullsv;
SvREFCNT_dec(data.longest_fixed);
longest_fixed_length = 0;
}
if (r->regstclass
&& (OP(r->regstclass) == REG_ANY || OP(r->regstclass) == ANYUTF8
|| OP(r->regstclass) == SANYUTF8 || OP(r->regstclass) == SANY))
r->regstclass = NULL;
if ((!r->anchored_substr || r->anchored_offset) && stclass_flag
&& !(data.start_class->flags & ANYOF_EOS)
&& !cl_is_anything(data.start_class)) {
SV *sv;
I32 n = add_data(1, "f");
New(1006, PL_regcomp_rx->data->data[n], 1,
struct regnode_charclass_class);
StructCopy(data.start_class,
(struct regnode_charclass_class*)PL_regcomp_rx->data->data[n],
struct regnode_charclass_class);
r->regstclass = (regnode*)PL_regcomp_rx->data->data[n];
r->reganch &= ~ROPT_SKIP; /* Used in find_byclass(). */
DEBUG_r((sv = sv_newmortal(),
regprop(sv, (regnode*)data.start_class),
PerlIO_printf(Perl_debug_log, "synthetic stclass `%s'.\n",
SvPVX(sv))));
}
/* A temporary algorithm prefers floated substr to fixed one to dig more info. */
if (longest_fixed_length > longest_float_length) {
r->check_substr = r->anchored_substr;
r->check_offset_min = r->check_offset_max = r->anchored_offset;
if (r->reganch & ROPT_ANCH_SINGLE)
r->reganch |= ROPT_NOSCAN;
}
else {
r->check_substr = r->float_substr;
r->check_offset_min = data.offset_float_min;
r->check_offset_max = data.offset_float_max;
}
/* XXXX Currently intuiting is not compatible with ANCH_GPOS.
This should be changed ASAP! */
if (r->check_substr && !(r->reganch & ROPT_ANCH_GPOS)) {
r->reganch |= RE_USE_INTUIT;
if (SvTAIL(r->check_substr))
r->reganch |= RE_INTUIT_TAIL;
}
}
else {
/* Several toplevels. Best we can is to set minlen. */
I32 fake;
struct regnode_charclass_class ch_class;
DEBUG_r(PerlIO_printf(Perl_debug_log, "\n"));
scan = r->program + 1;
cl_init(&ch_class);
data.start_class = &ch_class;
minlen = study_chunk(&scan, &fake, scan + PL_regsize, &data, SCF_DO_STCLASS_AND);
r->check_substr = r->anchored_substr = r->float_substr = Nullsv;
if (!(data.start_class->flags & ANYOF_EOS)
&& !cl_is_anything(data.start_class)) {
SV *sv;
I32 n = add_data(1, "f");
New(1006, PL_regcomp_rx->data->data[n], 1,
struct regnode_charclass_class);
StructCopy(data.start_class,
(struct regnode_charclass_class*)PL_regcomp_rx->data->data[n],
struct regnode_charclass_class);
r->regstclass = (regnode*)PL_regcomp_rx->data->data[n];
r->reganch &= ~ROPT_SKIP; /* Used in find_byclass(). */
DEBUG_r((sv = sv_newmortal(),
regprop(sv, (regnode*)data.start_class),
PerlIO_printf(Perl_debug_log, "synthetic stclass `%s'.\n",
SvPVX(sv))));
}
}
r->minlen = minlen;
if (PL_regseen & REG_SEEN_GPOS)
r->reganch |= ROPT_GPOS_SEEN;
if (PL_regseen & REG_SEEN_LOOKBEHIND)
r->reganch |= ROPT_LOOKBEHIND_SEEN;
if (PL_regseen & REG_SEEN_EVAL)
r->reganch |= ROPT_EVAL_SEEN;
Newz(1002, r->startp, PL_regnpar, I32);
Newz(1002, r->endp, PL_regnpar, I32);
DEBUG_r(regdump(r));
return(r);
}
/*
- reg - regular expression, i.e. main body or parenthesized thing
*
* Caller must absorb opening parenthesis.
*
* Combining parenthesis handling with the base level of regular expression
* is a trifle forced, but the need to tie the tails of the branches to what
* follows makes it hard to avoid.
*/
STATIC regnode *
S_reg(pTHX_ I32 paren, I32 *flagp)
/* paren: Parenthesized? 0=top, 1=(, inside: changed to letter. */
{
dTHR;
register regnode *ret; /* Will be the head of the group. */
register regnode *br;
register regnode *lastbr;
register regnode *ender = 0;
register I32 parno = 0;
I32 flags, oregflags = PL_regflags, have_branch = 0, open = 0;
char c;
*flagp = 0; /* Tentatively. */
/* Make an OPEN node, if parenthesized. */
if (paren) {
if (*PL_regcomp_parse == '?') {
U16 posflags = 0, negflags = 0;
U16 *flagsp = &posflags;
int logical = 0;
PL_regcomp_parse++;
paren = *PL_regcomp_parse++;
ret = NULL; /* For look-ahead/behind. */
switch (paren) {
case '<':
PL_regseen |= REG_SEEN_LOOKBEHIND;
if (*PL_regcomp_parse == '!')
paren = ',';
if (*PL_regcomp_parse != '=' && *PL_regcomp_parse != '!')
goto unknown;
PL_regcomp_parse++;
case '=':
case '!':
PL_seen_zerolen++;
case ':':
case '>':
break;
case '$':
case '@':
FAIL2("Sequence (?%c...) not implemented", (int)paren);
break;
case '#':
while (*PL_regcomp_parse && *PL_regcomp_parse != ')')
PL_regcomp_parse++;
if (*PL_regcomp_parse != ')')
FAIL("Sequence (?#... not terminated");
nextchar();
*flagp = TRYAGAIN;
return NULL;
case 'p':
if (SIZE_ONLY)
Perl_warner(aTHX_ WARN_REGEXP,
"(?p{}) is deprecated - use (??{})");
/* FALL THROUGH*/
case '?':
logical = 1;
paren = *PL_regcomp_parse++;
/* FALL THROUGH */
case '{':
{
dTHR;
I32 count = 1, n = 0;
char c;
char *s = PL_regcomp_parse;
SV *sv;
OP_4tree *sop, *rop;
PL_seen_zerolen++;
PL_regseen |= REG_SEEN_EVAL;
while (count && (c = *PL_regcomp_parse)) {
if (c == '\\' && PL_regcomp_parse[1])
PL_regcomp_parse++;
else if (c == '{')
count++;
else if (c == '}')
count--;
PL_regcomp_parse++;
}
if (*PL_regcomp_parse != ')')
FAIL("Sequence (?{...}) not terminated or not {}-balanced");
if (!SIZE_ONLY) {
AV *av;
if (PL_regcomp_parse - 1 - s)
sv = newSVpvn(s, PL_regcomp_parse - 1 - s);
else
sv = newSVpvn("", 0);
rop = sv_compile_2op(sv, &sop, "re", &av);
n = add_data(3, "nop");
PL_regcomp_rx->data->data[n] = (void*)rop;
PL_regcomp_rx->data->data[n+1] = (void*)sop;
PL_regcomp_rx->data->data[n+2] = (void*)av;
SvREFCNT_dec(sv);
}
else { /* First pass */
if (PL_reginterp_cnt < ++PL_seen_evals
&& PL_curcop != &PL_compiling)
/* No compiled RE interpolated, has runtime
components ===> unsafe. */
FAIL("Eval-group not allowed at runtime, use re 'eval'");
if (PL_tainted)
FAIL("Eval-group in insecure regular expression");
}
nextchar();
if (logical) {
ret = reg_node(LOGICAL);
if (!SIZE_ONLY)
ret->flags = 2;
regtail(ret, reganode(EVAL, n));
return ret;
}
return reganode(EVAL, n);
}
case '(':
{
if (PL_regcomp_parse[0] == '?') {
if (PL_regcomp_parse[1] == '=' || PL_regcomp_parse[1] == '!'
|| PL_regcomp_parse[1] == '<'
|| PL_regcomp_parse[1] == '{') { /* Lookahead or eval. */
I32 flag;
ret = reg_node(LOGICAL);
if (!SIZE_ONLY)
ret->flags = 1;
regtail(ret, reg(1, &flag));
goto insert_if;
}
}
else if (PL_regcomp_parse[0] >= '1' && PL_regcomp_parse[0] <= '9' ) {
parno = atoi(PL_regcomp_parse++);
while (isDIGIT(*PL_regcomp_parse))
PL_regcomp_parse++;
ret = reganode(GROUPP, parno);
if ((c = *nextchar()) != ')')
FAIL2("Switch (?(number%c not recognized", c);
insert_if:
regtail(ret, reganode(IFTHEN, 0));
br = regbranch(&flags, 1);
if (br == NULL)
br = reganode(LONGJMP, 0);
else
regtail(br, reganode(LONGJMP, 0));
c = *nextchar();
if (flags&HASWIDTH)
*flagp |= HASWIDTH;
if (c == '|') {
lastbr = reganode(IFTHEN, 0); /* Fake one for optimizer. */
regbranch(&flags, 1);
regtail(ret, lastbr);
if (flags&HASWIDTH)
*flagp |= HASWIDTH;
c = *nextchar();
}
else
lastbr = NULL;
if (c != ')')
FAIL("Switch (?(condition)... contains too many branches");
ender = reg_node(TAIL);
regtail(br, ender);
if (lastbr) {
regtail(lastbr, ender);
regtail(NEXTOPER(NEXTOPER(lastbr)), ender);
}
else
regtail(ret, ender);
return ret;
}
else {
FAIL2("Unknown condition for (?(%.2s", PL_regcomp_parse);
}
}
case 0:
FAIL("Sequence (? incomplete");
break;
default:
--PL_regcomp_parse;
parse_flags:
while (*PL_regcomp_parse && strchr("iogcmsx", *PL_regcomp_parse)) {
if (*PL_regcomp_parse != 'o')
pmflag(flagsp, *PL_regcomp_parse);
++PL_regcomp_parse;
}
if (*PL_regcomp_parse == '-') {
flagsp = &negflags;
++PL_regcomp_parse;
goto parse_flags;
}
PL_regflags |= posflags;
PL_regflags &= ~negflags;
if (*PL_regcomp_parse == ':') {
PL_regcomp_parse++;
paren = ':';
break;
}
unknown:
if (*PL_regcomp_parse != ')')
FAIL2("Sequence (?%c...) not recognized", *PL_regcomp_parse);
nextchar();
*flagp = TRYAGAIN;
return NULL;
}
}
else {
parno = PL_regnpar;
PL_regnpar++;
ret = reganode(OPEN, parno);
open = 1;
}
}
else
ret = NULL;
/* Pick up the branches, linking them together. */
br = regbranch(&flags, 1);
if (br == NULL)
return(NULL);
if (*PL_regcomp_parse == '|') {
if (!SIZE_ONLY && PL_extralen) {
reginsert(BRANCHJ, br);
}
else
reginsert(BRANCH, br);
have_branch = 1;
if (SIZE_ONLY)
PL_extralen += 1; /* For BRANCHJ-BRANCH. */
}
else if (paren == ':') {
*flagp |= flags&SIMPLE;
}
if (open) { /* Starts with OPEN. */
regtail(ret, br); /* OPEN -> first. */
}
else if (paren != '?') /* Not Conditional */
ret = br;
if (flags&HASWIDTH)
*flagp |= HASWIDTH;
*flagp |= flags&SPSTART;
lastbr = br;
while (*PL_regcomp_parse == '|') {
if (!SIZE_ONLY && PL_extralen) {
ender = reganode(LONGJMP,0);
regtail(NEXTOPER(NEXTOPER(lastbr)), ender); /* Append to the previous. */
}
if (SIZE_ONLY)
PL_extralen += 2; /* Account for LONGJMP. */
nextchar();
br = regbranch(&flags, 0);
if (br == NULL)
return(NULL);
regtail(lastbr, br); /* BRANCH -> BRANCH. */
lastbr = br;
if (flags&HASWIDTH)
*flagp |= HASWIDTH;
*flagp |= flags&SPSTART;
}
if (have_branch || paren != ':') {
/* Make a closing node, and hook it on the end. */
switch (paren) {
case ':':
ender = reg_node(TAIL);
break;
case 1:
ender = reganode(CLOSE, parno);
break;
case '<':
case ',':
case '=':
case '!':
*flagp &= ~HASWIDTH;
/* FALL THROUGH */
case '>':
ender = reg_node(SUCCEED);
break;
case 0:
ender = reg_node(END);
break;
}
regtail(lastbr, ender);
if (have_branch) {
/* Hook the tails of the branches to the closing node. */
for (br = ret; br != NULL; br = regnext(br)) {
regoptail(br, ender);
}
}
}
{
char *p;
static char parens[] = "=!<,>";
if (paren && (p = strchr(parens, paren))) {
int node = ((p - parens) % 2) ? UNLESSM : IFMATCH;
int flag = (p - parens) > 1;
if (paren == '>')
node = SUSPEND, flag = 0;
reginsert(node,ret);
ret->flags = flag;
regtail(ret, reg_node(TAIL));
}
}
/* Check for proper termination. */
if (paren) {
PL_regflags = oregflags;
if (PL_regcomp_parse >= PL_regxend || *nextchar() != ')') {
FAIL("unmatched () in regexp");
}
}
else if (!paren && PL_regcomp_parse < PL_regxend) {
if (*PL_regcomp_parse == ')') {
FAIL("unmatched () in regexp");
}
else
FAIL("junk on end of regexp"); /* "Can't happen". */
/* NOTREACHED */
}
return(ret);
}
/*
- regbranch - one alternative of an | operator
*
* Implements the concatenation operator.
*/
STATIC regnode *
S_regbranch(pTHX_ I32 *flagp, I32 first)
{
dTHR;
register regnode *ret;
register regnode *chain = NULL;
register regnode *latest;
I32 flags = 0, c = 0;
if (first)
ret = NULL;
else {
if (!SIZE_ONLY && PL_extralen)
ret = reganode(BRANCHJ,0);
else
ret = reg_node(BRANCH);
}
if (!first && SIZE_ONLY)
PL_extralen += 1; /* BRANCHJ */
*flagp = WORST; /* Tentatively. */
PL_regcomp_parse--;
nextchar();
while (PL_regcomp_parse < PL_regxend && *PL_regcomp_parse != '|' && *PL_regcomp_parse != ')') {
flags &= ~TRYAGAIN;
latest = regpiece(&flags);
if (latest == NULL) {
if (flags & TRYAGAIN)
continue;
return(NULL);
}
else if (ret == NULL)
ret = latest;
*flagp |= flags&HASWIDTH;
if (chain == NULL) /* First piece. */
*flagp |= flags&SPSTART;
else {
PL_regnaughty++;
regtail(chain, latest);
}
chain = latest;
c++;
}
if (chain == NULL) { /* Loop ran zero times. */
chain = reg_node(NOTHING);
if (ret == NULL)
ret = chain;
}
if (c == 1) {
*flagp |= flags&SIMPLE;
}
return(ret);
}
/*
- regpiece - something followed by possible [*+?]
*
* Note that the branching code sequences used for ? and the general cases
* of * and + are somewhat optimized: they use the same NOTHING node as
* both the endmarker for their branch list and the body of the last branch.
* It might seem that this node could be dispensed with entirely, but the
* endmarker role is not redundant.
*/
STATIC regnode *
S_regpiece(pTHX_ I32 *flagp)
{
dTHR;
register regnode *ret;
register char op;
register char *next;
I32 flags;
char *origparse = PL_regcomp_parse;
char *maxpos;
I32 min;
I32 max = REG_INFTY;
ret = regatom(&flags);
if (ret == NULL) {
if (flags & TRYAGAIN)
*flagp |= TRYAGAIN;
return(NULL);
}
op = *PL_regcomp_parse;
if (op == '{' && regcurly(PL_regcomp_parse)) {
next = PL_regcomp_parse + 1;
maxpos = Nullch;
while (isDIGIT(*next) || *next == ',') {
if (*next == ',') {
if (maxpos)
break;
else
maxpos = next;
}
next++;
}
if (*next == '}') { /* got one */
if (!maxpos)
maxpos = next;
PL_regcomp_parse++;
min = atoi(PL_regcomp_parse);
if (*maxpos == ',')
maxpos++;
else
maxpos = PL_regcomp_parse;
max = atoi(maxpos);
if (!max && *maxpos != '0')
max = REG_INFTY; /* meaning "infinity" */
else if (max >= REG_INFTY)
FAIL2("Quantifier in {,} bigger than %d", REG_INFTY - 1);
PL_regcomp_parse = next;
nextchar();
do_curly:
if ((flags&SIMPLE)) {
PL_regnaughty += 2 + PL_regnaughty / 2;
reginsert(CURLY, ret);
}
else {
regnode *w = reg_node(WHILEM);
w->flags = 0;
regtail(ret, w);
if (!SIZE_ONLY && PL_extralen) {
reginsert(LONGJMP,ret);
reginsert(NOTHING,ret);
NEXT_OFF(ret) = 3; /* Go over LONGJMP. */
}
reginsert(CURLYX,ret);
if (!SIZE_ONLY && PL_extralen)
NEXT_OFF(ret) = 3; /* Go over NOTHING to LONGJMP. */
regtail(ret, reg_node(NOTHING));
if (SIZE_ONLY)
PL_reg_whilem_seen++, PL_extralen += 3;
PL_regnaughty += 4 + PL_regnaughty; /* compound interest */
}
ret->flags = 0;
if (min > 0)
*flagp = WORST;
if (max > 0)
*flagp |= HASWIDTH;
if (max && max < min)
FAIL("Can't do {n,m} with n > m");
if (!SIZE_ONLY) {
ARG1_SET(ret, min);
ARG2_SET(ret, max);
}
goto nest_check;
}
}
if (!ISMULT1(op)) {
*flagp = flags;
return(ret);
}
#if 0 /* Now runtime fix should be reliable. */
if (!(flags&HASWIDTH) && op != '?')
FAIL("regexp *+ operand could be empty");
#endif
nextchar();
*flagp = (op != '+') ? (WORST|SPSTART|HASWIDTH) : (WORST|HASWIDTH);
if (op == '*' && (flags&SIMPLE)) {
reginsert(STAR, ret);
ret->flags = 0;
PL_regnaughty += 4;
}
else if (op == '*') {
min = 0;
goto do_curly;
}
else if (op == '+' && (flags&SIMPLE)) {
reginsert(PLUS, ret);
ret->flags = 0;
PL_regnaughty += 3;
}
else if (op == '+') {
min = 1;
goto do_curly;
}
else if (op == '?') {
min = 0; max = 1;
goto do_curly;
}
nest_check:
if (ckWARN(WARN_REGEXP) && !SIZE_ONLY && !(flags&HASWIDTH) && max > REG_INFTY/3) {
Perl_warner(aTHX_ WARN_REGEXP, "%.*s matches null string many times",
PL_regcomp_parse - origparse, origparse);
}
if (*PL_regcomp_parse == '?') {
nextchar();
reginsert(MINMOD, ret);
regtail(ret, ret + NODE_STEP_REGNODE);
}
if (ISMULT2(PL_regcomp_parse))
FAIL("nested *?+ in regexp");
return(ret);
}
/*
- regatom - the lowest level
*
* Optimization: gobbles an entire sequence of ordinary characters so that
* it can turn them into a single node, which is smaller to store and
* faster to run. Backslashed characters are exceptions, each becoming a
* separate node; the code is simpler that way and it's not worth fixing.
*
* [Yes, it is worth fixing, some scripts can run twice the speed.]
*/
STATIC regnode *
S_regatom(pTHX_ I32 *flagp)
{
dTHR;
register regnode *ret = 0;
I32 flags;
*flagp = WORST; /* Tentatively. */
tryagain:
switch (*PL_regcomp_parse) {
case '^':
PL_seen_zerolen++;
nextchar();
if (PL_regflags & PMf_MULTILINE)
ret = reg_node(MBOL);
else if (PL_regflags & PMf_SINGLELINE)
ret = reg_node(SBOL);
else
ret = reg_node(BOL);
break;
case '$':
if (PL_regcomp_parse[1])
PL_seen_zerolen++;
nextchar();
if (PL_regflags & PMf_MULTILINE)
ret = reg_node(MEOL);
else if (PL_regflags & PMf_SINGLELINE)
ret = reg_node(SEOL);
else
ret = reg_node(EOL);
break;
case '.':
nextchar();
if (UTF) {
if (PL_regflags & PMf_SINGLELINE)
ret = reg_node(SANYUTF8);
else
ret = reg_node(ANYUTF8);
*flagp |= HASWIDTH;
}
else {
if (PL_regflags & PMf_SINGLELINE)
ret = reg_node(SANY);
else
ret = reg_node(REG_ANY);
*flagp |= HASWIDTH|SIMPLE;
}
PL_regnaughty++;
break;
case '[':
PL_regcomp_parse++;
ret = (UTF ? regclassutf8() : regclass());
if (*PL_regcomp_parse != ']')
FAIL("unmatched [] in regexp");
nextchar();
*flagp |= HASWIDTH|SIMPLE;
break;
case '(':
nextchar();
ret = reg(1, &flags);
if (ret == NULL) {
if (flags & TRYAGAIN)
goto tryagain;
return(NULL);
}
*flagp |= flags&(HASWIDTH|SPSTART|SIMPLE);
break;
case '|':
case ')':
if (flags & TRYAGAIN) {
*flagp |= TRYAGAIN;
return NULL;
}
FAIL2("internal urp in regexp at /%s/", PL_regcomp_parse);
/* Supposed to be caught earlier. */
break;
case '{':
if (!regcurly(PL_regcomp_parse)) {
PL_regcomp_parse++;
goto defchar;
}
/* FALL THROUGH */
case '?':
case '+':
case '*':
FAIL("?+*{} follows nothing in regexp");
break;
case '\\':
switch (*++PL_regcomp_parse) {
case 'A':
PL_seen_zerolen++;
ret = reg_node(SBOL);
*flagp |= SIMPLE;
nextchar();
break;
case 'G':
ret = reg_node(GPOS);
PL_regseen |= REG_SEEN_GPOS;
*flagp |= SIMPLE;
nextchar();
break;
case 'Z':
ret = reg_node(SEOL);
*flagp |= SIMPLE;
nextchar();
break;
case 'z':
ret = reg_node(EOS);
*flagp |= SIMPLE;
PL_seen_zerolen++; /* Do not optimize RE away */
nextchar();
break;
case 'C':
ret = reg_node(SANY);
*flagp |= HASWIDTH|SIMPLE;
nextchar();
break;
case 'X':
ret = reg_node(CLUMP);
*flagp |= HASWIDTH;
nextchar();
if (UTF && !PL_utf8_mark)
is_utf8_mark((U8*)"~"); /* preload table */
break;
case 'w':
ret = reg_node(
UTF
? (LOC ? ALNUMLUTF8 : ALNUMUTF8)
: (LOC ? ALNUML : ALNUM));
*flagp |= HASWIDTH|SIMPLE;
nextchar();
if (UTF && !PL_utf8_alnum)
is_utf8_alnum((U8*)"a"); /* preload table */
break;
case 'W':
ret = reg_node(
UTF
? (LOC ? NALNUMLUTF8 : NALNUMUTF8)
: (LOC ? NALNUML : NALNUM));
*flagp |= HASWIDTH|SIMPLE;
nextchar();
if (UTF && !PL_utf8_alnum)
is_utf8_alnum((U8*)"a"); /* preload table */
break;
case 'b':
PL_seen_zerolen++;
PL_regseen |= REG_SEEN_LOOKBEHIND;
ret = reg_node(
UTF
? (LOC ? BOUNDLUTF8 : BOUNDUTF8)
: (LOC ? BOUNDL : BOUND));
*flagp |= SIMPLE;
nextchar();
if (UTF && !PL_utf8_alnum)
is_utf8_alnum((U8*)"a"); /* preload table */
break;
case 'B':
PL_seen_zerolen++;
PL_regseen |= REG_SEEN_LOOKBEHIND;
ret = reg_node(
UTF
? (LOC ? NBOUNDLUTF8 : NBOUNDUTF8)
: (LOC ? NBOUNDL : NBOUND));
*flagp |= SIMPLE;
nextchar();
if (UTF && !PL_utf8_alnum)
is_utf8_alnum((U8*)"a"); /* preload table */
break;
case 's':
ret = reg_node(
UTF
? (LOC ? SPACELUTF8 : SPACEUTF8)
: (LOC ? SPACEL : SPACE));
*flagp |= HASWIDTH|SIMPLE;
nextchar();
if (UTF && !PL_utf8_space)
is_utf8_space((U8*)" "); /* preload table */
break;
case 'S':
ret = reg_node(
UTF
? (LOC ? NSPACELUTF8 : NSPACEUTF8)
: (LOC ? NSPACEL : NSPACE));
*flagp |= HASWIDTH|SIMPLE;
nextchar();
if (UTF && !PL_utf8_space)
is_utf8_space((U8*)" "); /* preload table */
break;
case 'd':
ret = reg_node(UTF ? DIGITUTF8 : DIGIT);
*flagp |= HASWIDTH|SIMPLE;
nextchar();
if (UTF && !PL_utf8_digit)
is_utf8_digit((U8*)"1"); /* preload table */
break;
case 'D':
ret = reg_node(UTF ? NDIGITUTF8 : NDIGIT);
*flagp |= HASWIDTH|SIMPLE;
nextchar();
if (UTF && !PL_utf8_digit)
is_utf8_digit((U8*)"1"); /* preload table */
break;
case 'p':
case 'P':
{ /* a lovely hack--pretend we saw [\pX] instead */
char* oldregxend = PL_regxend;
if (PL_regcomp_parse[1] == '{') {
PL_regxend = strchr(PL_regcomp_parse, '}');
if (!PL_regxend)
FAIL("Missing right brace on \\p{}");
PL_regxend++;
}
else
PL_regxend = PL_regcomp_parse + 2;
PL_regcomp_parse--;
ret = regclassutf8();
PL_regxend = oldregxend;
PL_regcomp_parse--;
nextchar();
*flagp |= HASWIDTH|SIMPLE;
}
break;
case 'n':
case 'r':
case 't':
case 'f':
case 'e':
case 'a':
case 'x':
case 'c':
case '0':
goto defchar;
case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
{
I32 num = atoi(PL_regcomp_parse);
if (num > 9 && num >= PL_regnpar)
goto defchar;
else {
if (!SIZE_ONLY && num > PL_regcomp_rx->nparens)
FAIL("reference to nonexistent group");
PL_regsawback = 1;
ret = reganode(FOLD
? (LOC ? REFFL : REFF)
: REF, num);
*flagp |= HASWIDTH;
while (isDIGIT(*PL_regcomp_parse))
PL_regcomp_parse++;
PL_regcomp_parse--;
nextchar();
}
}
break;
case '\0':
if (PL_regcomp_parse >= PL_regxend)
FAIL("trailing \\ in regexp");
/* FALL THROUGH */
default:
/* Do not generate `unrecognized' warnings here, we fall
back into the quick-grab loop below */
goto defchar;
}
break;
case '#':
if (PL_regflags & PMf_EXTENDED) {
while (PL_regcomp_parse < PL_regxend && *PL_regcomp_parse != '\n') PL_regcomp_parse++;
if (PL_regcomp_parse < PL_regxend)
goto tryagain;
}
/* FALL THROUGH */
default: {
register I32 len;
register UV ender;
register char *p;
char *oldp, *s;
I32 numlen;
PL_regcomp_parse++;
defchar:
ret = reg_node(FOLD
? (LOC ? EXACTFL : EXACTF)
: EXACT);
s = STRING(ret);
for (len = 0, p = PL_regcomp_parse - 1;
len < 127 && p < PL_regxend;
len++)
{
oldp = p;
if (PL_regflags & PMf_EXTENDED)
p = regwhite(p, PL_regxend);
switch (*p) {
case '^':
case '$':
case '.':
case '[':
case '(':
case ')':
case '|':
goto loopdone;
case '\\':
switch (*++p) {
case 'A':
case 'G':
case 'Z':
case 'z':
case 'w':
case 'W':
case 'b':
case 'B':
case 's':
case 'S':
case 'd':
case 'D':
case 'p':
case 'P':
--p;
goto loopdone;
case 'n':
ender = '\n';
p++;
break;
case 'r':
ender = '\r';
p++;
break;
case 't':
ender = '\t';
p++;
break;
case 'f':
ender = '\f';
p++;
break;
case 'e':
#ifdef ASCIIish
ender = '\033';
#else
ender = '\047';
#endif
p++;
break;
case 'a':
#ifdef ASCIIish
ender = '\007';
#else
ender = '\057';
#endif
p++;
break;
case 'x':
if (*++p == '{') {
char* e = strchr(p, '}');
if (!e)
FAIL("Missing right brace on \\x{}");
else if (UTF) {
ender = (UV)scan_hex(p + 1, e - p, &numlen);
if (numlen + len >= 127) { /* numlen is generous */
p--;
goto loopdone;
}
p = e + 1;
}
else
FAIL("Can't use \\x{} without 'use utf8' declaration");
}
else {
ender = (UV)scan_hex(p, 2, &numlen);
p += numlen;
}
break;
case 'c':
p++;
ender = UCHARAT(p++);
ender = toCTRL(ender);
break;
case '0': case '1': case '2': case '3':case '4':
case '5': case '6': case '7': case '8':case '9':
if (*p == '0' ||
(isDIGIT(p[1]) && atoi(p) >= PL_regnpar) ) {
ender = (UV)scan_oct(p, 3, &numlen);
p += numlen;
}
else {
--p;
goto loopdone;
}
break;
case '\0':
if (p >= PL_regxend)
FAIL("trailing \\ in regexp");
/* FALL THROUGH */
default:
if (!SIZE_ONLY && ckWARN(WARN_REGEXP) && isALPHA(*p))
Perl_warner(aTHX_ WARN_REGEXP,
"/%.127s/: Unrecognized escape \\%c passed through",
PL_regprecomp,
*p);
goto normal_default;
}
break;
default:
normal_default:
if ((*p & 0xc0) == 0xc0 && UTF) {
ender = utf8_to_uv((U8*)p, &numlen);
p += numlen;
}
else
ender = *p++;
break;
}
if (PL_regflags & PMf_EXTENDED)
p = regwhite(p, PL_regxend);
if (UTF && FOLD) {
if (LOC)
ender = toLOWER_LC_uni(ender);
else
ender = toLOWER_uni(ender);
}
if (ISMULT2(p)) { /* Back off on ?+*. */
if (len)
p = oldp;
else if (ender >= 0x80 && UTF) {
reguni(ender, s, &numlen);
s += numlen;
len += numlen;
}
else {
len++;
REGC(ender, s++);
}
break;
}
if (ender >= 0x80 && UTF) {
reguni(ender, s, &numlen);
s += numlen;
len += numlen - 1;
}
else
REGC(ender, s++);
}
loopdone:
PL_regcomp_parse = p - 1;
nextchar();
if (len < 0)
FAIL("internal disaster in regexp");
if (len > 0)
*flagp |= HASWIDTH;
if (len == 1)
*flagp |= SIMPLE;
if (!SIZE_ONLY)
STR_LEN(ret) = len;
if (SIZE_ONLY)
PL_regsize += STR_SZ(len);
else
PL_regcode += STR_SZ(len);
}
break;
}
return(ret);
}
STATIC char *
S_regwhite(pTHX_ char *p, char *e)
{
while (p < e) {
if (isSPACE(*p))
++p;
else if (*p == '#') {
do {
p++;
} while (p < e && *p != '\n');
}
else
break;
}
return p;
}
/* Parse POSIX character classes: [[:foo:]], [[=foo=]], [[.foo.]].
Character classes ([:foo:]) can also be negated ([:^foo:]).
Returns a named class id (ANYOF_XXX) if successful, -1 otherwise.
Equivalence classes ([=foo=]) and composites ([.foo.]) are parsed,
but trigger warnings because they are currently unimplemented. */
STATIC I32
S_regpposixcc(pTHX_ I32 value)
{
dTHR;
char *posixcc = 0;
I32 namedclass = OOB_NAMEDCLASS;
if (value == '[' && PL_regcomp_parse + 1 < PL_regxend &&
/* I smell either [: or [= or [. -- POSIX has been here, right? */
(*PL_regcomp_parse == ':' ||
*PL_regcomp_parse == '=' ||
*PL_regcomp_parse == '.')) {
char c = *PL_regcomp_parse;
char* s = PL_regcomp_parse++;
while (PL_regcomp_parse < PL_regxend && *PL_regcomp_parse != c)
PL_regcomp_parse++;
if (PL_regcomp_parse == PL_regxend)
/* Grandfather lone [:, [=, [. */
PL_regcomp_parse = s;
else {
char* t = PL_regcomp_parse++; /* skip over the c */
if (*PL_regcomp_parse == ']') {
PL_regcomp_parse++; /* skip over the ending ] */
posixcc = s + 1;
if (*s == ':') {
I32 complement = *posixcc == '^' ? *posixcc++ : 0;
I32 skip = 5; /* the most common skip */
switch (*posixcc) {
case 'a':
if (strnEQ(posixcc, "alnum", 5))
namedclass =
complement ? ANYOF_NALNUMC : ANYOF_ALNUMC;
else if (strnEQ(posixcc, "alpha", 5))
namedclass =
complement ? ANYOF_NALPHA : ANYOF_ALPHA;
else if (strnEQ(posixcc, "ascii", 5))
namedclass =
complement ? ANYOF_NASCII : ANYOF_ASCII;
break;
case 'c':
if (strnEQ(posixcc, "cntrl", 5))
namedclass =
complement ? ANYOF_NCNTRL : ANYOF_CNTRL;
break;
case 'd':
if (strnEQ(posixcc, "digit", 5))
namedclass =
complement ? ANYOF_NDIGIT : ANYOF_DIGIT;
break;
case 'g':
if (strnEQ(posixcc, "graph", 5))
namedclass =
complement ? ANYOF_NGRAPH : ANYOF_GRAPH;
break;
case 'l':
if (strnEQ(posixcc, "lower", 5))
namedclass =
complement ? ANYOF_NLOWER : ANYOF_LOWER;
break;
case 'p':
if (strnEQ(posixcc, "print", 5))
namedclass =
complement ? ANYOF_NPRINT : ANYOF_PRINT;
else if (strnEQ(posixcc, "punct", 5))
namedclass =
complement ? ANYOF_NPUNCT : ANYOF_PUNCT;
break;
case 's':
if (strnEQ(posixcc, "space", 5))
namedclass =
complement ? ANYOF_NSPACE : ANYOF_SPACE;
case 'u':
if (strnEQ(posixcc, "upper", 5))
namedclass =
complement ? ANYOF_NUPPER : ANYOF_UPPER;
break;
case 'w': /* this is not POSIX, this is the Perl \w */
if (strnEQ(posixcc, "word", 4)) {
namedclass =
complement ? ANYOF_NALNUM : ANYOF_ALNUM;
skip = 4;
}
break;
case 'x':
if (strnEQ(posixcc, "xdigit", 6)) {
namedclass =
complement ? ANYOF_NXDIGIT : ANYOF_XDIGIT;
skip = 6;
}
break;
}
if (namedclass == OOB_NAMEDCLASS ||
posixcc[skip] != ':' ||
posixcc[skip+1] != ']')
Perl_croak(aTHX_
"Character class [:%.*s:] unknown",
t - s - 1, s + 1);
} else if (ckWARN(WARN_REGEXP) && !SIZE_ONLY)
/* [[=foo=]] and [[.foo.]] are still future. */
Perl_warner(aTHX_ WARN_REGEXP,
"Character class syntax [%c %c] is reserved for future extensions", c, c);
} else {
/* Maternal grandfather:
* "[:" ending in ":" but not in ":]" */
PL_regcomp_parse = s;
}
}
}
return namedclass;
}
STATIC void
S_checkposixcc(pTHX)
{
if (!SIZE_ONLY && ckWARN(WARN_REGEXP) &&
(*PL_regcomp_parse == ':' ||
*PL_regcomp_parse == '=' ||
*PL_regcomp_parse == '.')) {
char *s = PL_regcomp_parse;
char c = *s++;
while(*s && isALNUM(*s))
s++;
if (*s && c == *s && s[1] == ']') {
Perl_warner(aTHX_ WARN_REGEXP,
"Character class syntax [%c %c] belongs inside character classes", c, c);
if (c == '=' || c == '.')
Perl_warner(aTHX_ WARN_REGEXP,
"Character class syntax [%c %c] is reserved for future extensions", c, c);
}
}
}
STATIC regnode *
S_regclass(pTHX)
{
dTHR;
register U32 value;
register I32 lastvalue = OOB_CHAR8;
register I32 range = 0;
register regnode *ret;
I32 numlen;
I32 namedclass;
char *rangebegin;
bool need_class = 0;
ret = reg_node(ANYOF);
if (SIZE_ONLY)
PL_regsize += ANYOF_SKIP;
else {
ret->flags = 0;
ANYOF_BITMAP_ZERO(ret);
PL_regcode += ANYOF_SKIP;
if (FOLD)
ANYOF_FLAGS(ret) |= ANYOF_FOLD;
if (LOC)
ANYOF_FLAGS(ret) |= ANYOF_LOCALE;
}
if (*PL_regcomp_parse == '^') { /* Complement of range. */
PL_regnaughty++;
PL_regcomp_parse++;
if (!SIZE_ONLY)
ANYOF_FLAGS(ret) |= ANYOF_INVERT;
}
if (!SIZE_ONLY && ckWARN(WARN_REGEXP))
checkposixcc();
if (*PL_regcomp_parse == ']' || *PL_regcomp_parse == '-')
goto skipcond; /* allow 1st char to be ] or - */
while (PL_regcomp_parse < PL_regxend && *PL_regcomp_parse != ']') {
skipcond:
namedclass = OOB_NAMEDCLASS;
if (!range)
rangebegin = PL_regcomp_parse;
value = UCHARAT(PL_regcomp_parse++);
if (value == '[')
namedclass = regpposixcc(value);
else if (value == '\\') {
value = UCHARAT(PL_regcomp_parse++);
/* Some compilers cannot handle switching on 64-bit integer
* values, therefore value cannot be an UV. --jhi */
switch (value) {
case 'w': namedclass = ANYOF_ALNUM; break;
case 'W': namedclass = ANYOF_NALNUM; break;
case 's': namedclass = ANYOF_SPACE; break;
case 'S': namedclass = ANYOF_NSPACE; break;
case 'd': namedclass = ANYOF_DIGIT; break;
case 'D': namedclass = ANYOF_NDIGIT; break;
case 'n': value = '\n'; break;
case 'r': value = '\r'; break;
case 't': value = '\t'; break;
case 'f': value = '\f'; break;
case 'b': value = '\b'; break;
#ifdef ASCIIish
case 'e': value = '\033'; break;
case 'a': value = '\007'; break;
#else
case 'e': value = '\047'; break;
case 'a': value = '\057'; break;
#endif
case 'x':
value = (UV)scan_hex(PL_regcomp_parse, 2, &numlen);
PL_regcomp_parse += numlen;
break;
case 'c':
value = UCHARAT(PL_regcomp_parse++);
value = toCTRL(value);
break;
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
value = (UV)scan_oct(--PL_regcomp_parse, 3, &numlen);
PL_regcomp_parse += numlen;
break;
default:
if (!SIZE_ONLY && ckWARN(WARN_REGEXP) && isALPHA(value))
Perl_warner(aTHX_ WARN_REGEXP,
"/%.127s/: Unrecognized escape \\%c in character class passed through",
PL_regprecomp,
(int)value);
break;
}
}
if (namedclass > OOB_NAMEDCLASS) {
if (!need_class && !SIZE_ONLY)
ANYOF_CLASS_ZERO(ret);
need_class = 1;
if (range) { /* a-\d, a-[:digit:] */
if (!SIZE_ONLY) {
if (ckWARN(WARN_REGEXP))
Perl_warner(aTHX_ WARN_REGEXP,
"/%.127s/: false [] range \"%*.*s\" in regexp",
PL_regprecomp,
PL_regcomp_parse - rangebegin,
PL_regcomp_parse - rangebegin,
rangebegin);
ANYOF_BITMAP_SET(ret, lastvalue);
ANYOF_BITMAP_SET(ret, '-');
}
range = 0; /* this is not a true range */
}
if (!SIZE_ONLY) {
switch (namedclass) {
case ANYOF_ALNUM:
if (LOC)
ANYOF_CLASS_SET(ret, ANYOF_ALNUM);
else {
for (value = 0; value < 256; value++)
if (isALNUM(value))
ANYOF_BITMAP_SET(ret, value);
}
break;
case ANYOF_NALNUM:
if (LOC)
ANYOF_CLASS_SET(ret, ANYOF_NALNUM);
else {
for (value = 0; value < 256; value++)
if (!isALNUM(value))
ANYOF_BITMAP_SET(ret, value);
}
break;
case ANYOF_SPACE:
if (LOC)
ANYOF_CLASS_SET(ret, ANYOF_SPACE);
else {
for (value = 0; value < 256; value++)
if (isSPACE(value))
ANYOF_BITMAP_SET(ret, value);
}
break;
case ANYOF_NSPACE:
if (LOC)
ANYOF_CLASS_SET(ret, ANYOF_NSPACE);
else {
for (value = 0; value < 256; value++)
if (!isSPACE(value))
ANYOF_BITMAP_SET(ret, value);
}
break;
case ANYOF_DIGIT:
if (LOC)
ANYOF_CLASS_SET(ret, ANYOF_DIGIT);
else {
for (value = '0'; value <= '9'; value++)
ANYOF_BITMAP_SET(ret, value);
}
break;
case ANYOF_NDIGIT:
if (LOC)
ANYOF_CLASS_SET(ret, ANYOF_NDIGIT);
else {
for (value = 0; value < '0'; value++)
ANYOF_BITMAP_SET(ret, value);
for (value = '9' + 1; value < 256; value++)
ANYOF_BITMAP_SET(ret, value);
}
break;
case ANYOF_NALNUMC:
if (LOC)
ANYOF_CLASS_SET(ret, ANYOF_NALNUMC);
else {
for (value = 0; value < 256; value++)
if (!isALNUMC(value))
ANYOF_BITMAP_SET(ret, value);
}
break;
case ANYOF_ALNUMC:
if (LOC)
ANYOF_CLASS_SET(ret, ANYOF_ALNUMC);
else {
for (value = 0; value < 256; value++)
if (isALNUMC(value))
ANYOF_BITMAP_SET(ret, value);
}
break;
case ANYOF_ALPHA:
if (LOC)
ANYOF_CLASS_SET(ret, ANYOF_ALPHA);
else {
for (value = 0; value < 256; value++)
if (isALPHA(value))
ANYOF_BITMAP_SET(ret, value);
}
break;
case ANYOF_NALPHA:
if (LOC)
ANYOF_CLASS_SET(ret, ANYOF_NALPHA);
else {
for (value = 0; value < 256; value++)
if (!isALPHA(value))
ANYOF_BITMAP_SET(ret, value);
}
break;
case ANYOF_ASCII:
if (LOC)
ANYOF_CLASS_SET(ret, ANYOF_ASCII);
else {
#ifdef ASCIIish
for (value = 0; value < 128; value++)
ANYOF_BITMAP_SET(ret, value);
#else /* EBCDIC */
for (value = 0; value < 256; value++)
if (isASCII(value))
ANYOF_BITMAP_SET(ret, value);
#endif /* EBCDIC */
}
break;
case ANYOF_NASCII:
if (LOC)
ANYOF_CLASS_SET(ret, ANYOF_NASCII);
else {
#ifdef ASCIIish
for (value = 128; value < 256; value++)
ANYOF_BITMAP_SET(ret, value);
#else /* EBCDIC */
for (value = 0; value < 256; value++)
if (!isASCII(value))
ANYOF_BITMAP_SET(ret, value);
#endif /* EBCDIC */
}
break;
case ANYOF_CNTRL:
if (LOC)
ANYOF_CLASS_SET(ret, ANYOF_CNTRL);
else {
for (value = 0; value < 256; value++)
if (isCNTRL(value))
ANYOF_BITMAP_SET(ret, value);
}
lastvalue = OOB_CHAR8;
break;
case ANYOF_NCNTRL:
if (LOC)
ANYOF_CLASS_SET(ret, ANYOF_NCNTRL);
else {
for (value = 0; value < 256; value++)
if (!isCNTRL(value))
ANYOF_BITMAP_SET(ret, value);
}
break;
case ANYOF_GRAPH:
if (LOC)
ANYOF_CLASS_SET(ret, ANYOF_GRAPH);
else {
for (value = 0; value < 256; value++)
if (isGRAPH(value))
ANYOF_BITMAP_SET(ret, value);
}
break;
case ANYOF_NGRAPH:
if (LOC)
ANYOF_CLASS_SET(ret, ANYOF_NGRAPH);
else {
for (value = 0; value < 256; value++)
if (!isGRAPH(value))
ANYOF_BITMAP_SET(ret, value);
}
break;
case ANYOF_LOWER:
if (LOC)
ANYOF_CLASS_SET(ret, ANYOF_LOWER);
else {
for (value = 0; value < 256; value++)
if (isLOWER(value))
ANYOF_BITMAP_SET(ret, value);
}
break;
case ANYOF_NLOWER:
if (LOC)
ANYOF_CLASS_SET(ret, ANYOF_NLOWER);
else {
for (value = 0; value < 256; value++)
if (!isLOWER(value))
ANYOF_BITMAP_SET(ret, value);
}
break;
case ANYOF_PRINT:
if (LOC)
ANYOF_CLASS_SET(ret, ANYOF_PRINT);
else {
for (value = 0; value < 256; value++)
if (isPRINT(value))
ANYOF_BITMAP_SET(ret, value);
}
break;
case ANYOF_NPRINT:
if (LOC)
ANYOF_CLASS_SET(ret, ANYOF_NPRINT);
else {
for (value = 0; value < 256; value++)
if (!isPRINT(value))
ANYOF_BITMAP_SET(ret, value);
}
break;
case ANYOF_PUNCT:
if (LOC)
ANYOF_CLASS_SET(ret, ANYOF_PUNCT);
else {
for (value = 0; value < 256; value++)
if (isPUNCT(value))
ANYOF_BITMAP_SET(ret, value);
}
break;
case ANYOF_NPUNCT:
if (LOC)
ANYOF_CLASS_SET(ret, ANYOF_NPUNCT);
else {
for (value = 0; value < 256; value++)
if (!isPUNCT(value))
ANYOF_BITMAP_SET(ret, value);
}
break;
case ANYOF_UPPER:
if (LOC)
ANYOF_CLASS_SET(ret, ANYOF_UPPER);
else {
for (value = 0; value < 256; value++)
if (isUPPER(value))
ANYOF_BITMAP_SET(ret, value);
}
break;
case ANYOF_NUPPER:
if (LOC)
ANYOF_CLASS_SET(ret, ANYOF_NUPPER);
else {
for (value = 0; value < 256; value++)
if (!isUPPER(value))
ANYOF_BITMAP_SET(ret, value);
}
break;
case ANYOF_XDIGIT:
if (LOC)
ANYOF_CLASS_SET(ret, ANYOF_XDIGIT);
else {
for (value = 0; value < 256; value++)
if (isXDIGIT(value))
ANYOF_BITMAP_SET(ret, value);
}
break;
case ANYOF_NXDIGIT:
if (LOC)
ANYOF_CLASS_SET(ret, ANYOF_NXDIGIT);
else {
for (value = 0; value < 256; value++)
if (!isXDIGIT(value))
ANYOF_BITMAP_SET(ret, value);
}
break;
default:
FAIL("invalid [::] class in regexp");
break;
}
if (LOC)
ANYOF_FLAGS(ret) |= ANYOF_CLASS;
continue;
}
}
if (range) {
if (lastvalue > value) /* b-a */ {
Perl_croak(aTHX_
"/%.127s/: invalid [] range \"%*.*s\" in regexp",
PL_regprecomp,
PL_regcomp_parse - rangebegin,
PL_regcomp_parse - rangebegin,
rangebegin);
}
range = 0;
}
else {
lastvalue = value;
if (*PL_regcomp_parse == '-' && PL_regcomp_parse+1 < PL_regxend &&
PL_regcomp_parse[1] != ']') {
PL_regcomp_parse++;
if (namedclass > OOB_NAMEDCLASS) { /* \w-, [:word:]- */
if (ckWARN(WARN_REGEXP))
Perl_warner(aTHX_ WARN_REGEXP,
"/%.127s/: false [] range \"%*.*s\" in regexp",
PL_regprecomp,
PL_regcomp_parse - rangebegin,
PL_regcomp_parse - rangebegin,
rangebegin);
if (!SIZE_ONLY)
ANYOF_BITMAP_SET(ret, '-');
} else
range = 1;
continue; /* do it next time */
}
}
/* now is the next time */
if (!SIZE_ONLY) {
#ifndef ASCIIish /* EBCDIC, for example. */
if ((isLOWER(lastvalue) && isLOWER(value)) ||
(isUPPER(lastvalue) && isUPPER(value)))
{
I32 i;
if (isLOWER(lastvalue)) {
for (i = lastvalue; i <= value; i++)
if (isLOWER(i))
ANYOF_BITMAP_SET(ret, i);
} else {
for (i = lastvalue; i <= value; i++)
if (isUPPER(i))
ANYOF_BITMAP_SET(ret, i);
}
}
else
#endif
for ( ; lastvalue <= value; lastvalue++)
ANYOF_BITMAP_SET(ret, lastvalue);
}
range = 0;
}
if (need_class) {
if (SIZE_ONLY)
PL_regsize += ANYOF_CLASS_ADD_SKIP;
else
PL_regcode += ANYOF_CLASS_ADD_SKIP;
}
/* optimize case-insensitive simple patterns (e.g. /[a-z]/i) */
if (!SIZE_ONLY &&
(ANYOF_FLAGS(ret) & (ANYOF_FLAGS_ALL ^ ANYOF_INVERT)) == ANYOF_FOLD) {
for (value = 0; value < 256; ++value) {
if (ANYOF_BITMAP_TEST(ret, value)) {
I32 cf = PL_fold[value];
ANYOF_BITMAP_SET(ret, cf);
}
}
ANYOF_FLAGS(ret) &= ~ANYOF_FOLD;
}
/* optimize inverted simple patterns (e.g. [^a-z]) */
if (!SIZE_ONLY && (ANYOF_FLAGS(ret) & ANYOF_FLAGS_ALL) == ANYOF_INVERT) {
for (value = 0; value < ANYOF_BITMAP_SIZE; ++value)
ANYOF_BITMAP(ret)[value] ^= ANYOF_FLAGS_ALL;
ANYOF_FLAGS(ret) = 0;
}
return ret;
}
STATIC regnode *
S_regclassutf8(pTHX)
{
dTHR;
register char *e;
register U32 value;
register U32 lastvalue = OOB_UTF8;
register I32 range = 0;
register regnode *ret;
I32 numlen;
I32 n;
SV *listsv;
U8 flags = 0;
I32 namedclass;
char *rangebegin;
if (*PL_regcomp_parse == '^') { /* Complement of range. */
PL_regnaughty++;
PL_regcomp_parse++;
if (!SIZE_ONLY)
flags |= ANYOF_INVERT;
}
if (!SIZE_ONLY) {
if (FOLD)
flags |= ANYOF_FOLD;
if (LOC)
flags |= ANYOF_LOCALE;
listsv = newSVpvn("# comment\n",10);
}
if (!SIZE_ONLY && ckWARN(WARN_REGEXP))
checkposixcc();
if (*PL_regcomp_parse == ']' || *PL_regcomp_parse == '-')
goto skipcond; /* allow 1st char to be ] or - */
while (PL_regcomp_parse < PL_regxend && *PL_regcomp_parse != ']') {
skipcond:
namedclass = OOB_NAMEDCLASS;
if (!range)
rangebegin = PL_regcomp_parse;
value = utf8_to_uv((U8*)PL_regcomp_parse, &numlen);
PL_regcomp_parse += numlen;
if (value == '[')
namedclass = regpposixcc(value);
else if (value == '\\') {
value = (U32)utf8_to_uv((U8*)PL_regcomp_parse, &numlen);
PL_regcomp_parse += numlen;
/* Some compilers cannot handle switching on 64-bit integer
* values, therefore value cannot be an UV. Yes, this will
* be a problem later if we want switch on Unicode. --jhi */
switch (value) {
case 'w': namedclass = ANYOF_ALNUM; break;
case 'W': namedclass = ANYOF_NALNUM; break;
case 's': namedclass = ANYOF_SPACE; break;
case 'S': namedclass = ANYOF_NSPACE; break;
case 'd': namedclass = ANYOF_DIGIT; break;
case 'D': namedclass = ANYOF_NDIGIT; break;
case 'p':
case 'P':
if (*PL_regcomp_parse == '{') {
e = strchr(PL_regcomp_parse++, '}');
if (!e)
FAIL("Missing right brace on \\p{}");
n = e - PL_regcomp_parse;
}
else {
e = PL_regcomp_parse;
n = 1;
}
if (!SIZE_ONLY) {
if (value == 'p')
Perl_sv_catpvf(aTHX_ listsv,
"+utf8::%.*s\n", (int)n, PL_regcomp_parse);
else
Perl_sv_catpvf(aTHX_ listsv,
"!utf8::%.*s\n", (int)n, PL_regcomp_parse);
}
PL_regcomp_parse = e + 1;
lastvalue = OOB_UTF8;
continue;
case 'n': value = '\n'; break;
case 'r': value = '\r'; break;
case 't': value = '\t'; break;
case 'f': value = '\f'; break;
case 'b': value = '\b'; break;
#ifdef ASCIIish
case 'e': value = '\033'; break;
case 'a': value = '\007'; break;
#else
case 'e': value = '\047'; break;
case 'a': value = '\057'; break;
#endif
case 'x':
if (*PL_regcomp_parse == '{') {
e = strchr(PL_regcomp_parse++, '}');
if (!e)
FAIL("Missing right brace on \\x{}");
value = (UV)scan_hex(PL_regcomp_parse,
e - PL_regcomp_parse,
&numlen);
PL_regcomp_parse = e + 1;
}
else {
value = (UV)scan_hex(PL_regcomp_parse, 2, &numlen);
PL_regcomp_parse += numlen;
}
break;
case 'c':
value = UCHARAT(PL_regcomp_parse++);
value = toCTRL(value);
break;
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
value = (UV)scan_oct(--PL_regcomp_parse, 3, &numlen);
PL_regcomp_parse += numlen;
break;
default:
if (!SIZE_ONLY && ckWARN(WARN_REGEXP) && isALPHA(value))
Perl_warner(aTHX_ WARN_REGEXP,
"/%.127s/: Unrecognized escape \\%c in character class passed through",
PL_regprecomp,
(int)value);
break;
}
}
if (namedclass > OOB_NAMEDCLASS) {
if (range) { /* a-\d, a-[:digit:] */
if (!SIZE_ONLY) {
if (ckWARN(WARN_REGEXP))
Perl_warner(aTHX_ WARN_REGEXP,
"/%.127s/: false [] range \"%*.*s\" in regexp",
PL_regprecomp,
PL_regcomp_parse - rangebegin,
PL_regcomp_parse - rangebegin,
rangebegin);
Perl_sv_catpvf(aTHX_ listsv,
/* 0x002D is Unicode for '-' */
"%04"UVxf"\n002D\n", (UV)lastvalue);
}
range = 0;
}
if (!SIZE_ONLY) {
switch (namedclass) {
case ANYOF_ALNUM:
Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsWord\n"); break;
case ANYOF_NALNUM:
Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsWord\n"); break;
case ANYOF_ALNUMC:
Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsAlnum\n"); break;
case ANYOF_NALNUMC:
Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsAlnum\n"); break;
case ANYOF_ALPHA:
Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsAlpha\n"); break;
case ANYOF_NALPHA:
Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsAlpha\n"); break;
case ANYOF_ASCII:
Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsASCII\n"); break;
case ANYOF_NASCII:
Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsASCII\n"); break;
case ANYOF_CNTRL:
Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsCntrl\n"); break;
case ANYOF_NCNTRL:
Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsCntrl\n"); break;
case ANYOF_GRAPH:
Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsGraph\n"); break;
case ANYOF_NGRAPH:
Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsGraph\n"); break;
case ANYOF_DIGIT:
Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsDigit\n"); break;
case ANYOF_NDIGIT:
Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsDigit\n"); break;
case ANYOF_LOWER:
Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsLower\n"); break;
case ANYOF_NLOWER:
Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsLower\n"); break;
case ANYOF_PRINT:
Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsPrint\n"); break;
case ANYOF_NPRINT:
Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsPrint\n"); break;
case ANYOF_PUNCT:
Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsPunct\n"); break;
case ANYOF_NPUNCT:
Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsPunct\n"); break;
case ANYOF_SPACE:
Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsSpace\n"); break;
case ANYOF_NSPACE:
Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsSpace\n"); break;
case ANYOF_UPPER:
Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsUpper\n"); break;
case ANYOF_NUPPER:
Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsUpper\n"); break;
case ANYOF_XDIGIT:
Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsXDigit\n"); break;
case ANYOF_NXDIGIT:
Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsXDigit\n"); break;
}
continue;
}
}
if (range) {
if (lastvalue > value) { /* b-a */
Perl_croak(aTHX_
"/%.127s/: invalid [] range \"%*.*s\" in regexp",
PL_regprecomp,
PL_regcomp_parse - rangebegin,
PL_regcomp_parse - rangebegin,
rangebegin);
}
range = 0;
}
else {
lastvalue = value;
if (*PL_regcomp_parse == '-' && PL_regcomp_parse+1 < PL_regxend &&
PL_regcomp_parse[1] != ']') {
PL_regcomp_parse++;
if (namedclass > OOB_NAMEDCLASS) { /* \w-, [:word:]- */
if (ckWARN(WARN_REGEXP))
Perl_warner(aTHX_ WARN_REGEXP,
"/%.127s/: false [] range \"%*.*s\" in regexp",
PL_regprecomp,
PL_regcomp_parse - rangebegin,
PL_regcomp_parse - rangebegin,
rangebegin);
if (!SIZE_ONLY)
Perl_sv_catpvf(aTHX_ listsv,
/* 0x002D is Unicode for '-' */
"002D\n");
} else
range = 1;
continue; /* do it next time */
}
}
/* now is the next time */
if (!SIZE_ONLY)
Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\t%04"UVxf"\n",
(UV)lastvalue, (UV)value);
range = 0;
}
ret = reganode(ANYOFUTF8, 0);
if (!SIZE_ONLY) {
SV *rv = swash_init("utf8", "", listsv, 1, 0);
SvREFCNT_dec(listsv);
n = add_data(1,"s");
PL_regcomp_rx->data->data[n] = (void*)rv;
ARG1_SET(ret, flags);
ARG2_SET(ret, n);
}
return ret;
}
STATIC char*
S_nextchar(pTHX)
{
dTHR;
char* retval = PL_regcomp_parse++;
for (;;) {
if (*PL_regcomp_parse == '(' && PL_regcomp_parse[1] == '?' &&
PL_regcomp_parse[2] == '#') {
while (*PL_regcomp_parse && *PL_regcomp_parse != ')')
PL_regcomp_parse++;
PL_regcomp_parse++;
continue;
}
if (PL_regflags & PMf_EXTENDED) {
if (isSPACE(*PL_regcomp_parse)) {
PL_regcomp_parse++;
continue;
}
else if (*PL_regcomp_parse == '#') {
while (*PL_regcomp_parse && *PL_regcomp_parse != '\n')
PL_regcomp_parse++;
PL_regcomp_parse++;
continue;
}
}
return retval;
}
}
/*
- reg_node - emit a node
*/
STATIC regnode * /* Location. */
S_reg_node(pTHX_ U8 op)
{
dTHR;
register regnode *ret;
register regnode *ptr;
ret = PL_regcode;
if (SIZE_ONLY) {
SIZE_ALIGN(PL_regsize);
PL_regsize += 1;
return(ret);
}
NODE_ALIGN_FILL(ret);
ptr = ret;
FILL_ADVANCE_NODE(ptr, op);
PL_regcode = ptr;
return(ret);
}
/*
- reganode - emit a node with an argument
*/
STATIC regnode * /* Location. */
S_reganode(pTHX_ U8 op, U32 arg)
{
dTHR;
register regnode *ret;
register regnode *ptr;
ret = PL_regcode;
if (SIZE_ONLY) {
SIZE_ALIGN(PL_regsize);
PL_regsize += 2;
return(ret);
}
NODE_ALIGN_FILL(ret);
ptr = ret;
FILL_ADVANCE_NODE_ARG(ptr, op, arg);
PL_regcode = ptr;
return(ret);
}
/*
- reguni - emit (if appropriate) a Unicode character
*/
STATIC void
S_reguni(pTHX_ UV uv, char* s, I32* lenp)
{
dTHR;
if (SIZE_ONLY) {
U8 tmpbuf[UTF8_MAXLEN];
*lenp = uv_to_utf8(tmpbuf, uv) - tmpbuf;
}
else
*lenp = uv_to_utf8((U8*)s, uv) - (U8*)s;
}
/*
- reginsert - insert an operator in front of already-emitted operand
*
* Means relocating the operand.
*/
STATIC void
S_reginsert(pTHX_ U8 op, regnode *opnd)
{
dTHR;
register regnode *src;
register regnode *dst;
register regnode *place;
register int offset = regarglen[(U8)op];
/* (PL_regkind[(U8)op] == CURLY ? EXTRA_STEP_2ARGS : 0); */
if (SIZE_ONLY) {
PL_regsize += NODE_STEP_REGNODE + offset;
return;
}
src = PL_regcode;
PL_regcode += NODE_STEP_REGNODE + offset;
dst = PL_regcode;
while (src > opnd)
StructCopy(--src, --dst, regnode);
place = opnd; /* Op node, where operand used to be. */
src = NEXTOPER(place);
FILL_ADVANCE_NODE(place, op);
Zero(src, offset, regnode);
}
/*
- regtail - set the next-pointer at the end of a node chain of p to val.
*/
STATIC void
S_regtail(pTHX_ regnode *p, regnode *val)
{
dTHR;
register regnode *scan;
register regnode *temp;
if (SIZE_ONLY)
return;
/* Find last node. */
scan = p;
for (;;) {
temp = regnext(scan);
if (temp == NULL)
break;
scan = temp;
}
if (reg_off_by_arg[OP(scan)]) {
ARG_SET(scan, val - scan);
}
else {
NEXT_OFF(scan) = val - scan;
}
}
/*
- regoptail - regtail on operand of first argument; nop if operandless
*/
STATIC void
S_regoptail(pTHX_ regnode *p, regnode *val)
{
dTHR;
/* "Operandless" and "op != BRANCH" are synonymous in practice. */
if (p == NULL || SIZE_ONLY)
return;
if (PL_regkind[(U8)OP(p)] == BRANCH) {
regtail(NEXTOPER(p), val);
}
else if ( PL_regkind[(U8)OP(p)] == BRANCHJ) {
regtail(NEXTOPER(NEXTOPER(p)), val);
}
else
return;
}
/*
- regcurly - a little FSA that accepts {\d+,?\d*}
*/
STATIC I32
S_regcurly(pTHX_ register char *s)
{
if (*s++ != '{')
return FALSE;
if (!isDIGIT(*s))
return FALSE;
while (isDIGIT(*s))
s++;
if (*s == ',')
s++;
while (isDIGIT(*s))
s++;
if (*s != '}')
return FALSE;
return TRUE;
}
STATIC regnode *
S_dumpuntil(pTHX_ regnode *start, regnode *node, regnode *last, SV* sv, I32 l)
{
#ifdef DEBUGGING
register U8 op = EXACT; /* Arbitrary non-END op. */
register regnode *next;
while (op != END && (!last || node < last)) {
/* While that wasn't END last time... */
NODE_ALIGN(node);
op = OP(node);
if (op == CLOSE)
l--;
next = regnext(node);
/* Where, what. */
if (OP(node) == OPTIMIZED)
goto after_print;
regprop(sv, node);
PerlIO_printf(Perl_debug_log, "%4"IVdf":%*s%s", (IV)(node - start),
(int)(2*l + 1), "", SvPVX(sv));
if (next == NULL) /* Next ptr. */
PerlIO_printf(Perl_debug_log, "(0)");
else
PerlIO_printf(Perl_debug_log, "(%"IVdf")", (IV)(next - start));
(void)PerlIO_putc(Perl_debug_log, '\n');
after_print:
if (PL_regkind[(U8)op] == BRANCHJ) {
register regnode *nnode = (OP(next) == LONGJMP
? regnext(next)
: next);
if (last && nnode > last)
nnode = last;
node = dumpuntil(start, NEXTOPER(NEXTOPER(node)), nnode, sv, l + 1);
}
else if (PL_regkind[(U8)op] == BRANCH) {
node = dumpuntil(start, NEXTOPER(node), next, sv, l + 1);
}
else if ( op == CURLY) { /* `next' might be very big: optimizer */
node = dumpuntil(start, NEXTOPER(node) + EXTRA_STEP_2ARGS,
NEXTOPER(node) + EXTRA_STEP_2ARGS + 1, sv, l + 1);
}
else if (PL_regkind[(U8)op] == CURLY && op != CURLYX) {
node = dumpuntil(start, NEXTOPER(node) + EXTRA_STEP_2ARGS,
next, sv, l + 1);
}
else if ( op == PLUS || op == STAR) {
node = dumpuntil(start, NEXTOPER(node), NEXTOPER(node) + 1, sv, l + 1);
}
else if (op == ANYOF) {
node = NEXTOPER(node);
node += ANYOF_SKIP;
}
else if (PL_regkind[(U8)op] == EXACT) {
/* Literal string, where present. */
node += NODE_SZ_STR(node) - 1;
node = NEXTOPER(node);
}
else {
node = NEXTOPER(node);
node += regarglen[(U8)op];
}
if (op == CURLYX || op == OPEN)
l++;
else if (op == WHILEM)
l--;
}
#endif /* DEBUGGING */
return node;
}
/*
- regdump - dump a regexp onto Perl_debug_log in vaguely comprehensible form
*/
void
Perl_regdump(pTHX_ regexp *r)
{
#ifdef DEBUGGING
dTHR;
SV *sv = sv_newmortal();
(void)dumpuntil(r->program, r->program + 1, NULL, sv, 0);
/* Header fields of interest. */
if (r->anchored_substr)
PerlIO_printf(Perl_debug_log,
"anchored `%s%.*s%s'%s at %"IVdf" ",
PL_colors[0],
(int)(SvCUR(r->anchored_substr) - (SvTAIL(r->anchored_substr)!=0)),
SvPVX(r->anchored_substr),
PL_colors[1],
SvTAIL(r->anchored_substr) ? "$" : "",
(IV)r->anchored_offset);
if (r->float_substr)
PerlIO_printf(Perl_debug_log,
"floating `%s%.*s%s'%s at %"IVdf"..%"UVuf" ",
PL_colors[0],
(int)(SvCUR(r->float_substr) - (SvTAIL(r->float_substr)!=0)),
SvPVX(r->float_substr),
PL_colors[1],
SvTAIL(r->float_substr) ? "$" : "",
(IV)r->float_min_offset, (UV)r->float_max_offset);
if (r->check_substr)
PerlIO_printf(Perl_debug_log,
r->check_substr == r->float_substr
? "(checking floating" : "(checking anchored");
if (r->reganch & ROPT_NOSCAN)
PerlIO_printf(Perl_debug_log, " noscan");
if (r->reganch & ROPT_CHECK_ALL)
PerlIO_printf(Perl_debug_log, " isall");
if (r->check_substr)
PerlIO_printf(Perl_debug_log, ") ");
if (r->regstclass) {
regprop(sv, r->regstclass);
PerlIO_printf(Perl_debug_log, "stclass `%s' ", SvPVX(sv));
}
if (r->reganch & ROPT_ANCH) {
PerlIO_printf(Perl_debug_log, "anchored");
if (r->reganch & ROPT_ANCH_BOL)
PerlIO_printf(Perl_debug_log, "(BOL)");
if (r->reganch & ROPT_ANCH_MBOL)
PerlIO_printf(Perl_debug_log, "(MBOL)");
if (r->reganch & ROPT_ANCH_SBOL)
PerlIO_printf(Perl_debug_log, "(SBOL)");
if (r->reganch & ROPT_ANCH_GPOS)
PerlIO_printf(Perl_debug_log, "(GPOS)");
PerlIO_putc(Perl_debug_log, ' ');
}
if (r->reganch & ROPT_GPOS_SEEN)
PerlIO_printf(Perl_debug_log, "GPOS ");
if (r->reganch & ROPT_SKIP)
PerlIO_printf(Perl_debug_log, "plus ");
if (r->reganch & ROPT_IMPLICIT)
PerlIO_printf(Perl_debug_log, "implicit ");
PerlIO_printf(Perl_debug_log, "minlen %ld ", (long) r->minlen);
if (r->reganch & ROPT_EVAL_SEEN)
PerlIO_printf(Perl_debug_log, "with eval ");
PerlIO_printf(Perl_debug_log, "\n");
#endif /* DEBUGGING */
}
STATIC void
S_put_byte(pTHX_ SV *sv, int c)
{
if (c <= ' ' || c == 127 || c == 255)
Perl_sv_catpvf(aTHX_ sv, "\\%o", c);
else if (c == '-' || c == ']' || c == '\\' || c == '^')
Perl_sv_catpvf(aTHX_ sv, "\\%c", c);
else
Perl_sv_catpvf(aTHX_ sv, "%c", c);
}
/*
- regprop - printable representation of opcode
*/
void
Perl_regprop(pTHX_ SV *sv, regnode *o)
{
#ifdef DEBUGGING
dTHR;
register int k;
sv_setpvn(sv, "", 0);
if (OP(o) >= reg_num) /* regnode.type is unsigned */
FAIL("corrupted regexp opcode");
sv_catpv(sv, (char*)reg_name[OP(o)]); /* Take off const! */
k = PL_regkind[(U8)OP(o)];
if (k == EXACT)
Perl_sv_catpvf(aTHX_ sv, " <%s%.*s%s>", PL_colors[0],
STR_LEN(o), STRING(o), PL_colors[1]);
else if (k == CURLY) {
if (OP(o) == CURLYM || OP(o) == CURLYN)
Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* Parenth number */
Perl_sv_catpvf(aTHX_ sv, " {%d,%d}", ARG1(o), ARG2(o));
}
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 )
Perl_sv_catpvf(aTHX_ sv, "%d", (int)ARG(o)); /* Parenth number */
else if (k == LOGICAL)
Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* 2: embedded, otherwise 1 */
else if (k == ANYOF) {
int i, rangestart = -1;
const char * const out[] = { /* Should be syncronized with
a table in regcomp.h */
"\\w",
"\\W",
"\\s",
"\\S",
"\\d",
"\\D",
"[:alnum:]",
"[:^alnum:]",
"[:alpha:]",
"[:^alpha:]",
"[:ascii:]",
"[:^ascii:]",
"[:ctrl:]",
"[:^ctrl:]",
"[:graph:]",
"[:^graph:]",
"[:lower:]",
"[:^lower:]",
"[:print:]",
"[:^print:]",
"[:punct:]",
"[:^punct:]",
"[:upper:]",
"[:!upper:]",
"[:xdigit:]",
"[:^xdigit:]"
};
if (o->flags & ANYOF_LOCALE)
sv_catpv(sv, "{loc}");
if (o->flags & ANYOF_FOLD)
sv_catpv(sv, "{i}");
Perl_sv_catpvf(aTHX_ sv, "[%s", PL_colors[0]);
if (o->flags & ANYOF_INVERT)
sv_catpv(sv, "^");
for (i = 0; i <= 256; i++) {
if (i < 256 && ANYOF_BITMAP_TEST(o,i)) {
if (rangestart == -1)
rangestart = i;
} else if (rangestart != -1) {
if (i <= rangestart + 3)
for (; rangestart < i; rangestart++)
put_byte(sv, rangestart);
else {
put_byte(sv, rangestart);
sv_catpv(sv, "-");
put_byte(sv, i - 1);
}
rangestart = -1;
}
}
if (o->flags & ANYOF_CLASS)
for (i = 0; i < sizeof(out)/sizeof(char*); i++)
if (ANYOF_CLASS_TEST(o,i))
sv_catpv(sv, out[i]);
Perl_sv_catpvf(aTHX_ sv, "%s]", PL_colors[1]);
}
else if (k == BRANCHJ && (OP(o) == UNLESSM || OP(o) == IFMATCH))
Perl_sv_catpvf(aTHX_ sv, "[-%d]", o->flags);
#endif /* DEBUGGING */
}
SV *
Perl_re_intuit_string(pTHX_ regexp *prog)
{ /* Assume that RE_INTUIT is set */
DEBUG_r(
{ STRLEN n_a;
char *s = SvPV(prog->check_substr,n_a);
if (!PL_colorset) reginitcolors();
PerlIO_printf(Perl_debug_log,
"%sUsing REx substr:%s `%s%.60s%s%s'\n",
PL_colors[4],PL_colors[5],PL_colors[0],
s,
PL_colors[1],
(strlen(s) > 60 ? "..." : ""));
} );
return prog->check_substr;
}
void
Perl_pregfree(pTHX_ struct regexp *r)
{
dTHR;
DEBUG_r(if (!PL_colorset) reginitcolors());
if (!r || (--r->refcnt > 0))
return;
DEBUG_r(PerlIO_printf(Perl_debug_log,
"%sFreeing REx:%s `%s%.60s%s%s'\n",
PL_colors[4],PL_colors[5],PL_colors[0],
r->precomp,
PL_colors[1],
(strlen(r->precomp) > 60 ? "..." : "")));
if (r->precomp)
Safefree(r->precomp);
if (RX_MATCH_COPIED(r))
Safefree(r->subbeg);
if (r->substrs) {
if (r->anchored_substr)
SvREFCNT_dec(r->anchored_substr);
if (r->float_substr)
SvREFCNT_dec(r->float_substr);
Safefree(r->substrs);
}
if (r->data) {
int n = r->data->count;
AV* new_comppad = NULL;
AV* old_comppad;
SV** old_curpad;
while (--n >= 0) {
switch (r->data->what[n]) {
case 's':
SvREFCNT_dec((SV*)r->data->data[n]);
break;
case 'f':
Safefree(r->data->data[n]);
break;
case 'p':
new_comppad = (AV*)r->data->data[n];
break;
case 'o':
if (new_comppad == NULL)
Perl_croak(aTHX_ "panic: pregfree comppad");
old_comppad = PL_comppad;
old_curpad = PL_curpad;
PL_comppad = new_comppad;
PL_curpad = AvARRAY(new_comppad);
op_free((OP_4tree*)r->data->data[n]);
PL_comppad = old_comppad;
PL_curpad = old_curpad;
SvREFCNT_dec((SV*)new_comppad);
new_comppad = NULL;
break;
case 'n':
break;
default:
FAIL2("panic: regfree data code '%c'", r->data->what[n]);
}
}
Safefree(r->data->what);
Safefree(r->data);
}
Safefree(r->startp);
Safefree(r->endp);
Safefree(r);
}
/*
- regnext - dig the "next" pointer out of a node
*
* [Note, when REGALIGN is defined there are two places in regmatch()
* that bypass this code for speed.]
*/
regnode *
Perl_regnext(pTHX_ register regnode *p)
{
dTHR;
register I32 offset;
if (p == &PL_regdummy)
return(NULL);
offset = (reg_off_by_arg[OP(p)] ? ARG(p) : NEXT_OFF(p));
if (offset == 0)
return(NULL);
return(p+offset);
}
STATIC void
S_re_croak2(pTHX_ const char* pat1,const char* pat2,...)
{
va_list args;
STRLEN l1 = strlen(pat1);
STRLEN l2 = strlen(pat2);
char buf[512];
SV *msv;
char *message;
if (l1 > 510)
l1 = 510;
if (l1 + l2 > 510)
l2 = 510 - l1;
Copy(pat1, buf, l1 , char);
Copy(pat2, buf + l1, l2 , char);
buf[l1 + l2] = '\n';
buf[l1 + l2 + 1] = '\0';
#ifdef I_STDARG
/* ANSI variant takes additional second argument */
va_start(args, pat2);
#else
va_start(args);
#endif
msv = vmess(buf, &args);
va_end(args);
message = SvPV(msv,l1);
if (l1 > 512)
l1 = 512;
Copy(message, buf, l1 , char);
buf[l1] = '\0'; /* Overwrite \n */
Perl_croak(aTHX_ "%s", buf);
}
/* XXX Here's a total kludge. But we need to re-enter for swash routines. */
void
Perl_save_re_context(pTHX)
{
dTHR;
SAVEPPTR(PL_bostr);
SAVEPPTR(PL_regprecomp); /* uncompiled string. */
SAVEI32(PL_regnpar); /* () count. */
SAVEI32(PL_regsize); /* Code size. */
SAVEI16(PL_regflags); /* are we folding, multilining? */
SAVEPPTR(PL_reginput); /* String-input pointer. */
SAVEPPTR(PL_regbol); /* Beginning of input, for ^ check. */
SAVEPPTR(PL_regeol); /* End of input, for $ check. */
SAVEVPTR(PL_regstartp); /* Pointer to startp array. */
SAVEVPTR(PL_regendp); /* Ditto for endp. */
SAVEVPTR(PL_reglastparen); /* Similarly for lastparen. */
SAVEPPTR(PL_regtill); /* How far we are required to go. */
SAVEI8(PL_regprev); /* char before regbol, \n if none */
SAVEVPTR(PL_reg_start_tmp); /* from regexec.c */
PL_reg_start_tmp = 0;
SAVEFREEPV(PL_reg_start_tmp);
SAVEI32(PL_reg_start_tmpl); /* from regexec.c */
PL_reg_start_tmpl = 0;
SAVEVPTR(PL_regdata);
SAVEI32(PL_reg_flags); /* from regexec.c */
SAVEI32(PL_reg_eval_set); /* from regexec.c */
SAVEI32(PL_regnarrate); /* from regexec.c */
SAVEVPTR(PL_regprogram); /* from regexec.c */
SAVEINT(PL_regindent); /* from regexec.c */
SAVEVPTR(PL_regcc); /* from regexec.c */
SAVEVPTR(PL_curcop);
SAVEVPTR(PL_regcomp_rx); /* from regcomp.c */
SAVEI32(PL_regseen); /* from regcomp.c */
SAVEI32(PL_regsawback); /* Did we see \1, ...? */
SAVEI32(PL_regnaughty); /* How bad is this pattern? */
SAVEVPTR(PL_regcode); /* Code-emit pointer; &regdummy = don't */
SAVEPPTR(PL_regxend); /* End of input for compile */
SAVEPPTR(PL_regcomp_parse); /* Input-scan pointer. */
SAVEVPTR(PL_reg_call_cc); /* from regexec.c */
SAVEVPTR(PL_reg_re); /* from regexec.c */
SAVEPPTR(PL_reg_ganch); /* from regexec.c */
SAVESPTR(PL_reg_sv); /* from regexec.c */
SAVEVPTR(PL_reg_magic); /* from regexec.c */
SAVEI32(PL_reg_oldpos); /* from regexec.c */
SAVEVPTR(PL_reg_oldcurpm); /* from regexec.c */
SAVEVPTR(PL_reg_curpm); /* from regexec.c */
#ifdef DEBUGGING
SAVEPPTR(PL_reg_starttry); /* from regexec.c */
#endif
}
#ifdef PERL_OBJECT
#include "XSUB.h"
#undef this
#define this pPerl
#endif
static void
clear_re(pTHXo_ void *r)
{
ReREFCNT_dec((regexp *)r);
}
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