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2673 lines
66 KiB
C
2673 lines
66 KiB
C
/* regcomp.c
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*/
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/*
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* "A fair jaw-cracker dwarf-language must be." --Samwise Gamgee
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*/
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/* NOTE: this is derived from Henry Spencer's regexp code, and should not
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* confused with the original package (see point 3 below). Thanks, Henry!
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*/
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/* Additional note: this code is very heavily munged from Henry's version
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* in places. In some spots I've traded clarity for efficiency, so don't
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* blame Henry for some of the lack of readability.
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*/
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/* The names of the functions have been changed from regcomp and
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* regexec to pregcomp and pregexec in order to avoid conflicts
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* with the POSIX routines of the same names.
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*/
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#ifdef PERL_EXT_RE_BUILD
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/* need to replace pregcomp et al, so enable that */
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# ifndef PERL_IN_XSUB_RE
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# define PERL_IN_XSUB_RE
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# endif
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/* need access to debugger hooks */
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# ifndef DEBUGGING
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# define DEBUGGING
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# endif
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#endif
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#ifdef PERL_IN_XSUB_RE
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/* We *really* need to overwrite these symbols: */
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# define Perl_pregcomp my_regcomp
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# define Perl_regdump my_regdump
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# define Perl_regprop my_regprop
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/* *These* symbols are masked to allow static link. */
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# define Perl_pregfree my_regfree
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# define Perl_regnext my_regnext
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#endif
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/*SUPPRESS 112*/
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/*
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* pregcomp and pregexec -- regsub and regerror are not used in perl
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*
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* Copyright (c) 1986 by University of Toronto.
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* Written by Henry Spencer. Not derived from licensed software.
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*
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* Permission is granted to anyone to use this software for any
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* purpose on any computer system, and to redistribute it freely,
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* subject to the following restrictions:
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*
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* 1. The author is not responsible for the consequences of use of
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* this software, no matter how awful, even if they arise
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* from defects in it.
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*
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* 2. The origin of this software must not be misrepresented, either
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* by explicit claim or by omission.
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*
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* 3. Altered versions must be plainly marked as such, and must not
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* be misrepresented as being the original software.
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*
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*
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**** Alterations to Henry's code are...
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****
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**** Copyright (c) 1991-1997, Larry Wall
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****
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**** You may distribute under the terms of either the GNU General Public
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**** License or the Artistic License, as specified in the README file.
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*
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* Beware that some of this code is subtly aware of the way operator
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* precedence is structured in regular expressions. Serious changes in
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* regular-expression syntax might require a total rethink.
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*/
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#include "EXTERN.h"
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#include "perl.h"
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#ifndef PERL_IN_XSUB_RE
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# include "INTERN.h"
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#endif
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#define REG_COMP_C
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#include "regcomp.h"
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#ifdef op
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#undef op
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#endif /* op */
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#ifdef MSDOS
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# if defined(BUGGY_MSC6)
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/* MSC 6.00A breaks on op/regexp.t test 85 unless we turn this off */
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# pragma optimize("a",off)
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/* But MSC 6.00A is happy with 'w', for aliases only across function calls*/
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# pragma optimize("w",on )
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# endif /* BUGGY_MSC6 */
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#endif /* MSDOS */
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#ifndef STATIC
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#define STATIC static
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#endif
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#define ISMULT1(c) ((c) == '*' || (c) == '+' || (c) == '?')
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#define ISMULT2(s) ((*s) == '*' || (*s) == '+' || (*s) == '?' || \
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((*s) == '{' && regcurly(s)))
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#ifdef atarist
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#define PERL_META "^$.[()|?+*\\"
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#else
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#define META "^$.[()|?+*\\"
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#endif
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#ifdef SPSTART
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#undef SPSTART /* dratted cpp namespace... */
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#endif
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/*
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* Flags to be passed up and down.
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*/
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#define WORST 0 /* Worst case. */
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#define HASWIDTH 0x1 /* Known to match non-null strings. */
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#define SIMPLE 0x2 /* Simple enough to be STAR/PLUS operand. */
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#define SPSTART 0x4 /* Starts with * or +. */
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#define TRYAGAIN 0x8 /* Weeded out a declaration. */
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/*
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* Forward declarations for pregcomp()'s friends.
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*/
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#ifndef PERL_OBJECT
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static regnode *reg _((I32, I32 *));
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static regnode *reganode _((U8, U32));
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static regnode *regatom _((I32 *));
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static regnode *regbranch _((I32 *, I32));
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static void regc _((U8, char *));
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static regnode *regclass _((void));
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STATIC I32 regcurly _((char *));
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static regnode *reg_node _((U8));
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static regnode *regpiece _((I32 *));
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static void reginsert _((U8, regnode *));
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static void regoptail _((regnode *, regnode *));
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static void regtail _((regnode *, regnode *));
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static char* regwhite _((char *, char *));
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static char* nextchar _((void));
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static void re_croak2 _((const char* pat1,const char* pat2,...)) __attribute__((noreturn));
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#endif
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/* Length of a variant. */
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#ifndef PERL_OBJECT
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typedef struct {
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I32 len_min;
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I32 len_delta;
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I32 pos_min;
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I32 pos_delta;
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SV *last_found;
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I32 last_end; /* min value, <0 unless valid. */
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I32 last_start_min;
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I32 last_start_max;
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SV **longest; /* Either &l_fixed, or &l_float. */
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SV *longest_fixed;
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I32 offset_fixed;
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SV *longest_float;
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I32 offset_float_min;
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I32 offset_float_max;
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I32 flags;
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} scan_data_t;
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#endif
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static scan_data_t zero_scan_data = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
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#define SF_BEFORE_EOL (SF_BEFORE_SEOL|SF_BEFORE_MEOL)
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#define SF_BEFORE_SEOL 0x1
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#define SF_BEFORE_MEOL 0x2
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#define SF_FIX_BEFORE_EOL (SF_FIX_BEFORE_SEOL|SF_FIX_BEFORE_MEOL)
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#define SF_FL_BEFORE_EOL (SF_FL_BEFORE_SEOL|SF_FL_BEFORE_MEOL)
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#ifdef NO_UNARY_PLUS
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# define SF_FIX_SHIFT_EOL (0+2)
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# define SF_FL_SHIFT_EOL (0+4)
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#else
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# define SF_FIX_SHIFT_EOL (+2)
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# define SF_FL_SHIFT_EOL (+4)
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#endif
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#define SF_FIX_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FIX_SHIFT_EOL)
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#define SF_FIX_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FIX_SHIFT_EOL)
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#define SF_FL_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FL_SHIFT_EOL)
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#define SF_FL_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FL_SHIFT_EOL) /* 0x20 */
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#define SF_IS_INF 0x40
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#define SF_HAS_PAR 0x80
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#define SF_IN_PAR 0x100
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#define SF_HAS_EVAL 0x200
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#define SCF_DO_SUBSTR 0x400
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STATIC void
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scan_commit(scan_data_t *data)
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{
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STRLEN l = SvCUR(data->last_found);
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STRLEN old_l = SvCUR(*data->longest);
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if ((l >= old_l) && ((l > old_l) || (data->flags & SF_BEFORE_EOL))) {
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sv_setsv(*data->longest, data->last_found);
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if (*data->longest == data->longest_fixed) {
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data->offset_fixed = l ? data->last_start_min : data->pos_min;
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if (data->flags & SF_BEFORE_EOL)
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data->flags
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|= ((data->flags & SF_BEFORE_EOL) << SF_FIX_SHIFT_EOL);
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else
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data->flags &= ~SF_FIX_BEFORE_EOL;
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} else {
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data->offset_float_min = l ? data->last_start_min : data->pos_min;
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data->offset_float_max = (l
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? data->last_start_max
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: data->pos_min + data->pos_delta);
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if (data->flags & SF_BEFORE_EOL)
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data->flags
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|= ((data->flags & SF_BEFORE_EOL) << SF_FL_SHIFT_EOL);
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else
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data->flags &= ~SF_FL_BEFORE_EOL;
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}
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}
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SvCUR_set(data->last_found, 0);
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data->last_end = -1;
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data->flags &= ~SF_BEFORE_EOL;
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}
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/* Stops at toplevel WHILEM as well as at `last'. At end *scanp is set
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to the position after last scanned or to NULL. */
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STATIC I32
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study_chunk(regnode **scanp, I32 *deltap, regnode *last, scan_data_t *data, U32 flags)
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/* scanp: Start here (read-write). */
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/* deltap: Write maxlen-minlen here. */
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/* last: Stop before this one. */
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{
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dTHR;
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I32 min = 0, pars = 0, code;
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regnode *scan = *scanp, *next;
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I32 delta = 0;
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int is_inf = (flags & SCF_DO_SUBSTR) && (data->flags & SF_IS_INF);
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I32 is_par = OP(scan) == OPEN ? ARG(scan) : 0;
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scan_data_t data_fake;
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while (scan && OP(scan) != END && scan < last) {
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/* Peephole optimizer: */
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if (regkind[(U8)OP(scan)] == EXACT) {
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regnode *n = regnext(scan);
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U32 stringok = 1;
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#ifdef DEBUGGING
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regnode *stop = scan;
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#endif
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next = scan + (*OPERAND(scan) + 2 - 1)/sizeof(regnode) + 2;
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/* Skip NOTHING, merge EXACT*. */
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while (n &&
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( regkind[(U8)OP(n)] == NOTHING ||
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(stringok && (OP(n) == OP(scan))))
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&& NEXT_OFF(n)
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&& NEXT_OFF(scan) + NEXT_OFF(n) < I16_MAX) {
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if (OP(n) == TAIL || n > next)
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stringok = 0;
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if (regkind[(U8)OP(n)] == NOTHING) {
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NEXT_OFF(scan) += NEXT_OFF(n);
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next = n + NODE_STEP_REGNODE;
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#ifdef DEBUGGING
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if (stringok)
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stop = n;
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#endif
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n = regnext(n);
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} else {
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int oldl = *OPERAND(scan);
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regnode *nnext = regnext(n);
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if (oldl + *OPERAND(n) > U8_MAX)
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break;
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NEXT_OFF(scan) += NEXT_OFF(n);
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*OPERAND(scan) += *OPERAND(n);
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next = n + (*OPERAND(n) + 2 - 1)/sizeof(regnode) + 2;
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/* Now we can overwrite *n : */
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Move(OPERAND(n) + 1, OPERAND(scan) + oldl + 1,
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*OPERAND(n) + 1, char);
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#ifdef DEBUGGING
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if (stringok)
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stop = next - 1;
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#endif
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n = nnext;
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}
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}
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#ifdef DEBUGGING
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/* Allow dumping */
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n = scan + (*OPERAND(scan) + 2 - 1)/sizeof(regnode) + 2;
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while (n <= stop) {
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/* Purify reports a benign UMR here sometimes, because we
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* don't initialize the OP() slot of a node when that node
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* is occupied by just the trailing null of the string in
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* an EXACT node */
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if (regkind[(U8)OP(n)] != NOTHING || OP(n) == NOTHING) {
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OP(n) = OPTIMIZED;
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NEXT_OFF(n) = 0;
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}
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n++;
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}
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#endif
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}
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if (OP(scan) != CURLYX) {
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int max = (reg_off_by_arg[OP(scan)]
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? I32_MAX
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/* I32 may be smaller than U16 on CRAYs! */
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: (I32_MAX < U16_MAX ? I32_MAX : U16_MAX));
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int off = (reg_off_by_arg[OP(scan)] ? ARG(scan) : NEXT_OFF(scan));
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int noff;
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regnode *n = scan;
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/* Skip NOTHING and LONGJMP. */
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while ((n = regnext(n))
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&& ((regkind[(U8)OP(n)] == NOTHING && (noff = NEXT_OFF(n)))
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|| ((OP(n) == LONGJMP) && (noff = ARG(n))))
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&& off + noff < max)
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off += noff;
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if (reg_off_by_arg[OP(scan)])
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ARG(scan) = off;
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else
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NEXT_OFF(scan) = off;
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}
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if (OP(scan) == BRANCH || OP(scan) == BRANCHJ
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|| OP(scan) == IFTHEN || OP(scan) == SUSPEND) {
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next = regnext(scan);
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code = OP(scan);
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if (OP(next) == code || code == IFTHEN || code == SUSPEND) {
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I32 max1 = 0, min1 = I32_MAX, num = 0;
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if (flags & SCF_DO_SUBSTR)
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scan_commit(data);
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while (OP(scan) == code) {
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I32 deltanext, minnext;
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num++;
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data_fake.flags = 0;
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next = regnext(scan);
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scan = NEXTOPER(scan);
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if (code != BRANCH)
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scan = NEXTOPER(scan);
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/* We suppose the run is continuous, last=next...*/
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minnext = study_chunk(&scan, &deltanext, next,
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&data_fake, 0);
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if (min1 > minnext)
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min1 = minnext;
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if (max1 < minnext + deltanext)
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max1 = minnext + deltanext;
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if (deltanext == I32_MAX)
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is_inf = 1;
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scan = next;
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if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
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pars++;
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if (data && (data_fake.flags & SF_HAS_EVAL))
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data->flags |= SF_HAS_EVAL;
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if (code == SUSPEND)
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break;
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}
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if (code == IFTHEN && num < 2) /* Empty ELSE branch */
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min1 = 0;
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if (flags & SCF_DO_SUBSTR) {
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data->pos_min += min1;
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data->pos_delta += max1 - min1;
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if (max1 != min1 || is_inf)
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data->longest = &(data->longest_float);
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}
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min += min1;
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delta += max1 - min1;
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} else if (code == BRANCHJ) /* single branch is optimized. */
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scan = NEXTOPER(NEXTOPER(scan));
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else /* single branch is optimized. */
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scan = NEXTOPER(scan);
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continue;
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} else if (OP(scan) == EXACT) {
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min += *OPERAND(scan);
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if (flags & SCF_DO_SUBSTR) { /* Update longest substr. */
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I32 l = *OPERAND(scan);
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/* The code below prefers earlier match for fixed
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offset, later match for variable offset. */
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if (data->last_end == -1) { /* Update the start info. */
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data->last_start_min = data->pos_min;
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data->last_start_max = is_inf
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? I32_MAX : data->pos_min + data->pos_delta;
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}
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sv_catpvn(data->last_found, (char *)(OPERAND(scan)+1), l);
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data->last_end = data->pos_min + l;
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data->pos_min += l; /* As in the first entry. */
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data->flags &= ~SF_BEFORE_EOL;
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}
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} else if (regkind[(U8)OP(scan)] == EXACT) {
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if (flags & SCF_DO_SUBSTR)
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scan_commit(data);
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min += *OPERAND(scan);
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if (data && (flags & SCF_DO_SUBSTR))
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data->pos_min += *OPERAND(scan);
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} else if (strchr(varies,OP(scan))) {
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I32 mincount, maxcount, minnext, deltanext, pos_before, fl;
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regnode *oscan = scan;
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|
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switch (regkind[(U8)OP(scan)]) {
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case WHILEM:
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scan = NEXTOPER(scan);
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goto finish;
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case PLUS:
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if (flags & SCF_DO_SUBSTR) {
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next = NEXTOPER(scan);
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if (OP(next) == EXACT) {
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mincount = 1;
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maxcount = REG_INFTY;
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next = regnext(scan);
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scan = NEXTOPER(scan);
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goto do_curly;
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}
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}
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if (flags & SCF_DO_SUBSTR)
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data->pos_min++;
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min++;
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/* Fall through. */
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case STAR:
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is_inf = 1;
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scan = regnext(scan);
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if (flags & SCF_DO_SUBSTR) {
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scan_commit(data);
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data->longest = &(data->longest_float);
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}
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goto optimize_curly_tail;
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case CURLY:
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mincount = ARG1(scan);
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maxcount = ARG2(scan);
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next = regnext(scan);
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scan = NEXTOPER(scan) + EXTRA_STEP_2ARGS;
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do_curly:
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if (flags & SCF_DO_SUBSTR) {
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if (mincount == 0) scan_commit(data);
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pos_before = data->pos_min;
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}
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if (data) {
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fl = data->flags;
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data->flags &= ~(SF_HAS_PAR|SF_IN_PAR|SF_HAS_EVAL);
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if (is_inf)
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data->flags |= SF_IS_INF;
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}
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/* This will finish on WHILEM, setting scan, or on NULL: */
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minnext = study_chunk(&scan, &deltanext, last, data,
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mincount == 0
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? (flags & ~SCF_DO_SUBSTR) : flags);
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if (!scan) /* It was not CURLYX, but CURLY. */
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scan = next;
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if (PL_dowarn && (minnext + deltanext == 0)
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&& !(data->flags & (SF_HAS_PAR|SF_IN_PAR))
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&& maxcount <= 10000) /* Complement check for big count */
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warn("Strange *+?{} on zero-length expression");
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min += minnext * mincount;
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is_inf |= (maxcount == REG_INFTY && (minnext + deltanext) > 0
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|| deltanext == I32_MAX);
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delta += (minnext + deltanext) * maxcount - minnext * mincount;
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|
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/* Try powerful optimization CURLYX => CURLYN. */
|
|
if ( OP(oscan) == CURLYX && data
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|
&& data->flags & SF_IN_PAR
|
|
&& !(data->flags & SF_HAS_EVAL)
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|
&& !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(simple,OP(nxt))
|
|
&& !(regkind[(U8)OP(nxt)] == EXACT
|
|
&& *OPERAND(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;
|
|
}
|
|
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);
|
|
|
|
l -= b - data->last_start_min;
|
|
/* Get the added string: */
|
|
last_str = newSVpv(s + b - data->last_start_min, 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) {
|
|
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 - SvCUR(last_str);
|
|
data->last_start_max = is_inf
|
|
? I32_MAX
|
|
: data->pos_min + data->pos_delta
|
|
- SvCUR(last_str);
|
|
}
|
|
data->longest = &(data->longest_float);
|
|
}
|
|
}
|
|
if (data && (fl & SF_HAS_EVAL))
|
|
data->flags |= SF_HAS_EVAL;
|
|
optimize_curly_tail:
|
|
if (OP(oscan) != CURLYX) {
|
|
while (regkind[(U8)OP(next = regnext(oscan))] == NOTHING
|
|
&& NEXT_OFF(next))
|
|
NEXT_OFF(oscan) += NEXT_OFF(next);
|
|
}
|
|
continue;
|
|
default: /* REF only? */
|
|
if (flags & SCF_DO_SUBSTR) {
|
|
scan_commit(data);
|
|
data->longest = &(data->longest_float);
|
|
}
|
|
is_inf = 1;
|
|
break;
|
|
}
|
|
} else if (strchr(simple,OP(scan))) {
|
|
if (flags & SCF_DO_SUBSTR) {
|
|
scan_commit(data);
|
|
data->pos_min++;
|
|
}
|
|
min++;
|
|
} else if (regkind[(U8)OP(scan)] == EOL && flags & SCF_DO_SUBSTR) {
|
|
data->flags |= (OP(scan) == MEOL
|
|
? SF_BEFORE_MEOL
|
|
: SF_BEFORE_SEOL);
|
|
} else if (regkind[(U8)OP(scan)] == BRANCHJ
|
|
&& (scan->flags || data)
|
|
&& (OP(scan) == IFMATCH || OP(scan) == UNLESSM)) {
|
|
I32 deltanext, minnext;
|
|
regnode *nscan;
|
|
|
|
data_fake.flags = 0;
|
|
next = regnext(scan);
|
|
nscan = NEXTOPER(NEXTOPER(scan));
|
|
minnext = study_chunk(&nscan, &deltanext, last, &data_fake, 0);
|
|
if (scan->flags) {
|
|
if (deltanext) {
|
|
FAIL("variable length lookbehind not implemented");
|
|
} else if (minnext > U8_MAX) {
|
|
FAIL2("lookbehind longer than %d not implemented", 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;
|
|
} 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: zero-length, ignore. */
|
|
scan = regnext(scan);
|
|
}
|
|
|
|
finish:
|
|
*scanp = scan;
|
|
*deltap = is_inf ? 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;
|
|
}
|
|
return min;
|
|
}
|
|
|
|
STATIC I32
|
|
add_data(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;
|
|
}
|
|
|
|
/*
|
|
- 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 *
|
|
pregcomp(char *exp, char *xend, PMOP *pm)
|
|
{
|
|
dTHR;
|
|
register regexp *r;
|
|
regnode *scan;
|
|
SV **longest;
|
|
SV *longest_fixed;
|
|
SV *longest_float;
|
|
regnode *first;
|
|
I32 flags;
|
|
I32 minlen = 0;
|
|
I32 sawplus = 0;
|
|
I32 sawopen = 0;
|
|
|
|
if (exp == NULL)
|
|
FAIL("NULL regexp argument");
|
|
|
|
PL_regprecomp = savepvn(exp, xend - exp);
|
|
DEBUG_r(PerlIO_printf(Perl_debug_log, "compiling RE `%*s'\n",
|
|
xend - exp, PL_regprecomp));
|
|
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;
|
|
regc((U8)MAGIC, (char*)PL_regcode);
|
|
if (reg(0, &flags) == NULL) {
|
|
Safefree(PL_regprecomp);
|
|
PL_regprecomp = Nullch;
|
|
return(NULL);
|
|
}
|
|
DEBUG_r(PerlIO_printf(Perl_debug_log, "size %d ", PL_regsize));
|
|
|
|
DEBUG_r(
|
|
if (!PL_colorset) {
|
|
int i = 0;
|
|
char *s = PerlEnv_getenv("TERMCAP_COLORS");
|
|
|
|
PL_colorset = 1;
|
|
if (s) {
|
|
PL_colors[0] = s = savepv(s);
|
|
while (++i < 4) {
|
|
s = strchr(s, '\t');
|
|
if (!s)
|
|
FAIL("Not enough TABs in TERMCAP_COLORS");
|
|
*s = '\0';
|
|
PL_colors[i] = ++s;
|
|
}
|
|
} else {
|
|
while (i < 4)
|
|
PL_colors[i++] = "";
|
|
}
|
|
/* Reset colors: */
|
|
PerlIO_printf(Perl_debug_log, "%s%s%s%s",
|
|
PL_colors[0],PL_colors[1],PL_colors[2],PL_colors[3]);
|
|
}
|
|
);
|
|
|
|
/* 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;
|
|
|
|
/* Allocate space and initialize. */
|
|
Newc(1001, r, sizeof(regexp) + (unsigned)PL_regsize * sizeof(regnode),
|
|
char, regexp);
|
|
if (r == NULL)
|
|
FAIL("regexp out of space");
|
|
r->refcnt = 1;
|
|
r->prelen = xend - exp;
|
|
r->precomp = PL_regprecomp;
|
|
r->subbeg = r->subbase = NULL;
|
|
r->nparens = PL_regnpar - 1; /* set early to validate backrefs */
|
|
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)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;
|
|
pm->op_pmflags = PL_regflags;
|
|
r->regstclass = NULL;
|
|
r->naughty = PL_regnaughty >= 10; /* Probably an expensive pattern. */
|
|
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);
|
|
|
|
if (OP(scan) != BRANCH) { /* Only one top-level choice. */
|
|
scan_data_t data;
|
|
I32 fake;
|
|
STRLEN longest_float_length, longest_fixed_length;
|
|
|
|
StructCopy(&zero_scan_data, &data, scan_data_t);
|
|
first = scan;
|
|
/* Skip introductions and multiplicators >= 1. */
|
|
while ((OP(first) == OPEN && (sawopen = 1)) ||
|
|
(OP(first) == BRANCH && OP(regnext(first)) != BRANCH) ||
|
|
(OP(first) == PLUS) ||
|
|
(OP(first) == MINMOD) ||
|
|
(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 (OP(first) == EXACT); /* Empty, get anchored substr later. */
|
|
else if (strchr(simple+2,OP(first)))
|
|
r->regstclass = first;
|
|
else if (regkind[(U8)OP(first)] == BOUND ||
|
|
regkind[(U8)OP(first)] == NBOUND)
|
|
r->regstclass = first;
|
|
else if (regkind[(U8)OP(first)] == BOL) {
|
|
r->reganch |= (OP(first) == MBOL ? ROPT_ANCH_MBOL: 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 &&
|
|
regkind[(U8)OP(NEXTOPER(first))] == ANY) &&
|
|
!(r->reganch & ROPT_ANCH) )
|
|
{
|
|
/* turn .* into ^.* with an implied $*=1 */
|
|
r->reganch |= ROPT_ANCH_BOL | ROPT_IMPLICIT;
|
|
first = NEXTOPER(first);
|
|
goto again;
|
|
}
|
|
if (sawplus && (!sawopen || !PL_regsawback))
|
|
r->reganch |= ROPT_SKIP; /* x+ must match 1st of run */
|
|
|
|
/* Scan is after the zeroth branch, first is atomic matcher. */
|
|
DEBUG_r(PerlIO_printf(Perl_debug_log, "first at %d\n",
|
|
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 = newSVpv("",0);
|
|
data.longest_float = newSVpv("",0);
|
|
data.last_found = newSVpv("",0);
|
|
data.longest = &(data.longest_fixed);
|
|
first = scan;
|
|
|
|
minlen = study_chunk(&first, &fake, scan + PL_regsize, /* Up to end */
|
|
&data, SCF_DO_SUBSTR);
|
|
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 = SvCUR(data.longest_float);
|
|
if (longest_float_length
|
|
|| (data.flags & SF_FL_BEFORE_EOL
|
|
&& (!(data.flags & SF_FL_BEFORE_MEOL)
|
|
|| (PL_regflags & PMf_MULTILINE)))) {
|
|
if (SvCUR(data.longest_fixed)
|
|
&& data.offset_fixed == data.offset_float_min)
|
|
goto remove; /* Like in (a)+. */
|
|
|
|
r->float_substr = data.longest_float;
|
|
r->float_min_offset = data.offset_float_min;
|
|
r->float_max_offset = data.offset_float_max;
|
|
fbm_compile(r->float_substr, 0);
|
|
BmUSEFUL(r->float_substr) = 100;
|
|
if (data.flags & SF_FL_BEFORE_EOL /* Cannot have SEOL and MULTI */
|
|
&& (!(data.flags & SF_FL_BEFORE_MEOL)
|
|
|| (PL_regflags & PMf_MULTILINE)))
|
|
SvTAIL_on(r->float_substr);
|
|
} else {
|
|
remove:
|
|
r->float_substr = Nullsv;
|
|
SvREFCNT_dec(data.longest_float);
|
|
longest_float_length = 0;
|
|
}
|
|
|
|
longest_fixed_length = SvCUR(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)))) {
|
|
r->anchored_substr = data.longest_fixed;
|
|
r->anchored_offset = data.offset_fixed;
|
|
fbm_compile(r->anchored_substr, 0);
|
|
BmUSEFUL(r->anchored_substr) = 100;
|
|
if (data.flags & SF_FIX_BEFORE_EOL /* Cannot have SEOL and MULTI */
|
|
&& (!(data.flags & SF_FIX_BEFORE_MEOL)
|
|
|| (PL_regflags & PMf_MULTILINE)))
|
|
SvTAIL_on(r->anchored_substr);
|
|
} else {
|
|
r->anchored_substr = Nullsv;
|
|
SvREFCNT_dec(data.longest_fixed);
|
|
longest_fixed_length = 0;
|
|
}
|
|
|
|
/* 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;
|
|
}
|
|
} else {
|
|
/* Several toplevels. Best we can is to set minlen. */
|
|
I32 fake;
|
|
|
|
DEBUG_r(PerlIO_printf(Perl_debug_log, "\n"));
|
|
scan = r->program + 1;
|
|
minlen = study_chunk(&scan, &fake, scan + PL_regsize, NULL, 0);
|
|
r->check_substr = r->anchored_substr = r->float_substr = Nullsv;
|
|
}
|
|
|
|
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, char*);
|
|
Newz(1002, r->endp, PL_regnpar, char*);
|
|
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 *
|
|
reg(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;
|
|
|
|
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 '{':
|
|
{
|
|
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 = newSVpv(s, PL_regcomp_parse - 1 - s);
|
|
else
|
|
sv = newSVpv("", 0);
|
|
|
|
rop = sv_compile_2op(sv, &sop, "re", &av);
|
|
|
|
n = add_data(3, "nso");
|
|
PL_regcomp_rx->data->data[n] = (void*)rop;
|
|
PL_regcomp_rx->data->data[n+1] = (void*)av;
|
|
PL_regcomp_rx->data->data[n+2] = (void*)sop;
|
|
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();
|
|
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);
|
|
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 (c == '|') {
|
|
lastbr = reganode(IFTHEN, 0); /* Fake one for optimizer. */
|
|
regbranch(&flags, 1);
|
|
regtail(ret, lastbr);
|
|
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_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 */
|
|
}
|
|
if (paren != 0) {
|
|
PL_regflags = oregflags;
|
|
}
|
|
|
|
return(ret);
|
|
}
|
|
|
|
/*
|
|
- regbranch - one alternative of an | operator
|
|
*
|
|
* Implements the concatenation operator.
|
|
*/
|
|
STATIC regnode *
|
|
regbranch(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 *
|
|
regpiece(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 {
|
|
PL_regnaughty += 4 + PL_regnaughty; /* compound interest */
|
|
regtail(ret, reg_node(WHILEM));
|
|
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_extralen += 3;
|
|
}
|
|
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 (PL_dowarn && !SIZE_ONLY && !(flags&HASWIDTH) && max > 10000) {
|
|
warn("%.*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 *
|
|
regatom(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 (PL_regflags & PMf_SINGLELINE)
|
|
ret = reg_node(SANY);
|
|
else
|
|
ret = reg_node(ANY);
|
|
PL_regnaughty++;
|
|
*flagp |= HASWIDTH|SIMPLE;
|
|
break;
|
|
case '[':
|
|
PL_regcomp_parse++;
|
|
ret = regclass();
|
|
*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 'w':
|
|
ret = reg_node((PL_regflags & PMf_LOCALE) ? ALNUML : ALNUM);
|
|
*flagp |= HASWIDTH|SIMPLE;
|
|
nextchar();
|
|
break;
|
|
case 'W':
|
|
ret = reg_node((PL_regflags & PMf_LOCALE) ? NALNUML : NALNUM);
|
|
*flagp |= HASWIDTH|SIMPLE;
|
|
nextchar();
|
|
break;
|
|
case 'b':
|
|
PL_seen_zerolen++;
|
|
ret = reg_node((PL_regflags & PMf_LOCALE) ? BOUNDL : BOUND);
|
|
*flagp |= SIMPLE;
|
|
nextchar();
|
|
break;
|
|
case 'B':
|
|
PL_seen_zerolen++;
|
|
ret = reg_node((PL_regflags & PMf_LOCALE) ? NBOUNDL : NBOUND);
|
|
*flagp |= SIMPLE;
|
|
nextchar();
|
|
break;
|
|
case 's':
|
|
ret = reg_node((PL_regflags & PMf_LOCALE) ? SPACEL : SPACE);
|
|
*flagp |= HASWIDTH|SIMPLE;
|
|
nextchar();
|
|
break;
|
|
case 'S':
|
|
ret = reg_node((PL_regflags & PMf_LOCALE) ? NSPACEL : NSPACE);
|
|
*flagp |= HASWIDTH|SIMPLE;
|
|
nextchar();
|
|
break;
|
|
case 'd':
|
|
ret = reg_node(DIGIT);
|
|
*flagp |= HASWIDTH|SIMPLE;
|
|
nextchar();
|
|
break;
|
|
case 'D':
|
|
ret = reg_node(NDIGIT);
|
|
*flagp |= HASWIDTH|SIMPLE;
|
|
nextchar();
|
|
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((PL_regflags & PMf_FOLD)
|
|
? ((PL_regflags & PMf_LOCALE) ? 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:
|
|
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 U8 ender;
|
|
register char *p;
|
|
char *oldp, *s;
|
|
I32 numlen;
|
|
|
|
PL_regcomp_parse++;
|
|
|
|
defchar:
|
|
ret = reg_node((PL_regflags & PMf_FOLD)
|
|
? ((PL_regflags & PMf_LOCALE) ? EXACTFL : EXACTF)
|
|
: EXACT);
|
|
s = (char *) OPERAND(ret);
|
|
regc(0, s++); /* save spot for len */
|
|
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':
|
|
--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':
|
|
ender = '\033';
|
|
p++;
|
|
break;
|
|
case 'a':
|
|
ender = '\007';
|
|
p++;
|
|
break;
|
|
case 'x':
|
|
ender = 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 = 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:
|
|
ender = *p++;
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
ender = *p++;
|
|
break;
|
|
}
|
|
if (PL_regflags & PMf_EXTENDED)
|
|
p = regwhite(p, PL_regxend);
|
|
if (ISMULT2(p)) { /* Back off on ?+*. */
|
|
if (len)
|
|
p = oldp;
|
|
else {
|
|
len++;
|
|
regc(ender, s++);
|
|
}
|
|
break;
|
|
}
|
|
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)
|
|
*OPERAND(ret) = len;
|
|
regc('\0', s++);
|
|
if (SIZE_ONLY) {
|
|
PL_regsize += (len + 2 + sizeof(regnode) - 1) / sizeof(regnode);
|
|
} else {
|
|
PL_regcode += (len + 2 + sizeof(regnode) - 1) / sizeof(regnode);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
return(ret);
|
|
}
|
|
|
|
STATIC char *
|
|
regwhite(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;
|
|
}
|
|
|
|
STATIC regnode *
|
|
regclass(void)
|
|
{
|
|
dTHR;
|
|
register char *opnd, *s;
|
|
register I32 Class;
|
|
register I32 lastclass = 1234;
|
|
register I32 range = 0;
|
|
register regnode *ret;
|
|
register I32 def;
|
|
I32 numlen;
|
|
|
|
s = opnd = (char *) OPERAND(PL_regcode);
|
|
ret = reg_node(ANYOF);
|
|
for (Class = 0; Class < 33; Class++)
|
|
regc(0, s++);
|
|
if (*PL_regcomp_parse == '^') { /* Complement of range. */
|
|
PL_regnaughty++;
|
|
PL_regcomp_parse++;
|
|
if (!SIZE_ONLY)
|
|
*opnd |= ANYOF_INVERT;
|
|
}
|
|
if (!SIZE_ONLY) {
|
|
PL_regcode += ANY_SKIP;
|
|
if (PL_regflags & PMf_FOLD)
|
|
*opnd |= ANYOF_FOLD;
|
|
if (PL_regflags & PMf_LOCALE)
|
|
*opnd |= ANYOF_LOCALE;
|
|
} else {
|
|
PL_regsize += ANY_SKIP;
|
|
}
|
|
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:
|
|
Class = UCHARAT(PL_regcomp_parse++);
|
|
if (Class == '[' && 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 posixccc = *PL_regcomp_parse;
|
|
char* posixccs = PL_regcomp_parse++;
|
|
|
|
while (PL_regcomp_parse < PL_regxend && *PL_regcomp_parse != posixccc)
|
|
PL_regcomp_parse++;
|
|
if (PL_regcomp_parse == PL_regxend)
|
|
/* Grandfather lone [:, [=, [. */
|
|
PL_regcomp_parse = posixccs;
|
|
else {
|
|
PL_regcomp_parse++; /* skip over the posixccc */
|
|
if (*PL_regcomp_parse == ']') {
|
|
/* Not Implemented Yet.
|
|
* (POSIX Extended Character Classes, that is)
|
|
* The text between e.g. [: and :] would start
|
|
* at posixccs + 1 and stop at regcomp_parse - 2. */
|
|
if (PL_dowarn && !SIZE_ONLY)
|
|
warn("Character class syntax [%c %c] is reserved for future extensions", posixccc, posixccc);
|
|
PL_regcomp_parse++; /* skip over the ending ] */
|
|
}
|
|
}
|
|
}
|
|
if (Class == '\\') {
|
|
Class = UCHARAT(PL_regcomp_parse++);
|
|
switch (Class) {
|
|
case 'w':
|
|
if (!SIZE_ONLY) {
|
|
if (PL_regflags & PMf_LOCALE)
|
|
*opnd |= ANYOF_ALNUML;
|
|
else {
|
|
for (Class = 0; Class < 256; Class++)
|
|
if (isALNUM(Class))
|
|
ANYOF_SET(opnd, Class);
|
|
}
|
|
}
|
|
lastclass = 1234;
|
|
continue;
|
|
case 'W':
|
|
if (!SIZE_ONLY) {
|
|
if (PL_regflags & PMf_LOCALE)
|
|
*opnd |= ANYOF_NALNUML;
|
|
else {
|
|
for (Class = 0; Class < 256; Class++)
|
|
if (!isALNUM(Class))
|
|
ANYOF_SET(opnd, Class);
|
|
}
|
|
}
|
|
lastclass = 1234;
|
|
continue;
|
|
case 's':
|
|
if (!SIZE_ONLY) {
|
|
if (PL_regflags & PMf_LOCALE)
|
|
*opnd |= ANYOF_SPACEL;
|
|
else {
|
|
for (Class = 0; Class < 256; Class++)
|
|
if (isSPACE(Class))
|
|
ANYOF_SET(opnd, Class);
|
|
}
|
|
}
|
|
lastclass = 1234;
|
|
continue;
|
|
case 'S':
|
|
if (!SIZE_ONLY) {
|
|
if (PL_regflags & PMf_LOCALE)
|
|
*opnd |= ANYOF_NSPACEL;
|
|
else {
|
|
for (Class = 0; Class < 256; Class++)
|
|
if (!isSPACE(Class))
|
|
ANYOF_SET(opnd, Class);
|
|
}
|
|
}
|
|
lastclass = 1234;
|
|
continue;
|
|
case 'd':
|
|
if (!SIZE_ONLY) {
|
|
for (Class = '0'; Class <= '9'; Class++)
|
|
ANYOF_SET(opnd, Class);
|
|
}
|
|
lastclass = 1234;
|
|
continue;
|
|
case 'D':
|
|
if (!SIZE_ONLY) {
|
|
for (Class = 0; Class < '0'; Class++)
|
|
ANYOF_SET(opnd, Class);
|
|
for (Class = '9' + 1; Class < 256; Class++)
|
|
ANYOF_SET(opnd, Class);
|
|
}
|
|
lastclass = 1234;
|
|
continue;
|
|
case 'n':
|
|
Class = '\n';
|
|
break;
|
|
case 'r':
|
|
Class = '\r';
|
|
break;
|
|
case 't':
|
|
Class = '\t';
|
|
break;
|
|
case 'f':
|
|
Class = '\f';
|
|
break;
|
|
case 'b':
|
|
Class = '\b';
|
|
break;
|
|
case 'e':
|
|
Class = '\033';
|
|
break;
|
|
case 'a':
|
|
Class = '\007';
|
|
break;
|
|
case 'x':
|
|
Class = scan_hex(PL_regcomp_parse, 2, &numlen);
|
|
PL_regcomp_parse += numlen;
|
|
break;
|
|
case 'c':
|
|
Class = UCHARAT(PL_regcomp_parse++);
|
|
Class = toCTRL(Class);
|
|
break;
|
|
case '0': case '1': case '2': case '3': case '4':
|
|
case '5': case '6': case '7': case '8': case '9':
|
|
Class = scan_oct(--PL_regcomp_parse, 3, &numlen);
|
|
PL_regcomp_parse += numlen;
|
|
break;
|
|
}
|
|
}
|
|
if (range) {
|
|
if (lastclass > Class)
|
|
FAIL("invalid [] range in regexp");
|
|
range = 0;
|
|
}
|
|
else {
|
|
lastclass = Class;
|
|
if (*PL_regcomp_parse == '-' && PL_regcomp_parse+1 < PL_regxend &&
|
|
PL_regcomp_parse[1] != ']') {
|
|
PL_regcomp_parse++;
|
|
range = 1;
|
|
continue; /* do it next time */
|
|
}
|
|
}
|
|
if (!SIZE_ONLY) {
|
|
for ( ; lastclass <= Class; lastclass++)
|
|
ANYOF_SET(opnd, lastclass);
|
|
}
|
|
lastclass = Class;
|
|
}
|
|
if (*PL_regcomp_parse != ']')
|
|
FAIL("unmatched [] in regexp");
|
|
nextchar();
|
|
/* optimize case-insensitive simple patterns (e.g. /[a-z]/i) */
|
|
if (!SIZE_ONLY && (*opnd & (0xFF ^ ANYOF_INVERT)) == ANYOF_FOLD) {
|
|
for (Class = 0; Class < 256; ++Class) {
|
|
if (ANYOF_TEST(opnd, Class)) {
|
|
I32 cf = fold[Class];
|
|
ANYOF_SET(opnd, cf);
|
|
}
|
|
}
|
|
*opnd &= ~ANYOF_FOLD;
|
|
}
|
|
/* optimize inverted simple patterns (e.g. [^a-z]) */
|
|
if (!SIZE_ONLY && (*opnd & 0xFF) == ANYOF_INVERT) {
|
|
for (Class = 0; Class < 32; ++Class)
|
|
opnd[1 + Class] ^= 0xFF;
|
|
*opnd = 0;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
STATIC char*
|
|
nextchar(void)
|
|
{
|
|
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. */
|
|
reg_node(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. */
|
|
reganode(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);
|
|
}
|
|
|
|
/*
|
|
- regc - emit (if appropriate) a byte of code
|
|
*/
|
|
STATIC void
|
|
regc(U8 b, char* s)
|
|
{
|
|
dTHR;
|
|
if (!SIZE_ONLY)
|
|
*s = b;
|
|
}
|
|
|
|
/*
|
|
- reginsert - insert an operator in front of already-emitted operand
|
|
*
|
|
* Means relocating the operand.
|
|
*/
|
|
STATIC void
|
|
reginsert(U8 op, regnode *opnd)
|
|
{
|
|
dTHR;
|
|
register regnode *src;
|
|
register regnode *dst;
|
|
register regnode *place;
|
|
register int offset = regarglen[(U8)op];
|
|
|
|
/* (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
|
|
regtail(regnode *p, regnode *val)
|
|
{
|
|
dTHR;
|
|
register regnode *scan;
|
|
register regnode *temp;
|
|
register I32 offset;
|
|
|
|
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
|
|
regoptail(regnode *p, regnode *val)
|
|
{
|
|
dTHR;
|
|
/* "Operandless" and "op != BRANCH" are synonymous in practice. */
|
|
if (p == NULL || SIZE_ONLY)
|
|
return;
|
|
if (regkind[(U8)OP(p)] == BRANCH) {
|
|
regtail(NEXTOPER(p), val);
|
|
} else if ( regkind[(U8)OP(p)] == BRANCHJ) {
|
|
regtail(NEXTOPER(NEXTOPER(p)), val);
|
|
} else
|
|
return;
|
|
}
|
|
|
|
/*
|
|
- regcurly - a little FSA that accepts {\d+,?\d*}
|
|
*/
|
|
STATIC I32
|
|
regcurly(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 *
|
|
dumpuntil(regnode *start, regnode *node, regnode *last, SV* sv, I32 l)
|
|
{
|
|
#ifdef DEBUGGING
|
|
register char op = EXACT; /* Arbitrary non-END op. */
|
|
register regnode *next, *onode;
|
|
|
|
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, "%4d:%*s%s", node - start,
|
|
2*l + 1, "", SvPVX(sv));
|
|
if (next == NULL) /* Next ptr. */
|
|
PerlIO_printf(Perl_debug_log, "(0)");
|
|
else
|
|
PerlIO_printf(Perl_debug_log, "(%d)", next - start);
|
|
(void)PerlIO_putc(Perl_debug_log, '\n');
|
|
after_print:
|
|
if (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 (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 (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 += ANY_SKIP;
|
|
} else if (regkind[(U8)op] == EXACT) {
|
|
/* Literal string, where present. */
|
|
node += ((*OPERAND(node)) + 2 + sizeof(regnode) - 1) / sizeof(regnode);
|
|
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
|
|
regdump(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 %d ",
|
|
PL_colors[0],
|
|
SvPVX(r->anchored_substr),
|
|
PL_colors[1],
|
|
SvTAIL(r->anchored_substr) ? "$" : "",
|
|
r->anchored_offset);
|
|
if (r->float_substr)
|
|
PerlIO_printf(Perl_debug_log, "floating `%s%s%s'%s at %d..%u ",
|
|
PL_colors[0],
|
|
SvPVX(r->float_substr),
|
|
PL_colors[1],
|
|
SvTAIL(r->float_substr) ? "$" : "",
|
|
r->float_min_offset, 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_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 */
|
|
}
|
|
|
|
/*
|
|
- regprop - printable representation of opcode
|
|
*/
|
|
void
|
|
regprop(SV *sv, regnode *o)
|
|
{
|
|
#ifdef DEBUGGING
|
|
dTHR;
|
|
register char *p = 0;
|
|
|
|
sv_setpvn(sv, "", 0);
|
|
switch (OP(o)) {
|
|
case BOL:
|
|
p = "BOL";
|
|
break;
|
|
case MBOL:
|
|
p = "MBOL";
|
|
break;
|
|
case SBOL:
|
|
p = "SBOL";
|
|
break;
|
|
case EOL:
|
|
p = "EOL";
|
|
break;
|
|
case EOS:
|
|
p = "EOS";
|
|
break;
|
|
case MEOL:
|
|
p = "MEOL";
|
|
break;
|
|
case SEOL:
|
|
p = "SEOL";
|
|
break;
|
|
case ANY:
|
|
p = "ANY";
|
|
break;
|
|
case SANY:
|
|
p = "SANY";
|
|
break;
|
|
case ANYOF:
|
|
p = "ANYOF";
|
|
break;
|
|
case BRANCH:
|
|
p = "BRANCH";
|
|
break;
|
|
case EXACT:
|
|
sv_catpvf(sv, "EXACT <%s%s%s>", PL_colors[0], OPERAND(o) + 1, PL_colors[1]);
|
|
break;
|
|
case EXACTF:
|
|
sv_catpvf(sv, "EXACTF <%s%s%s>", PL_colors[0], OPERAND(o) + 1, PL_colors[1]);
|
|
break;
|
|
case EXACTFL:
|
|
sv_catpvf(sv, "EXACTFL <%s%s%s>", PL_colors[0], OPERAND(o) + 1, PL_colors[1]);
|
|
break;
|
|
case NOTHING:
|
|
p = "NOTHING";
|
|
break;
|
|
case TAIL:
|
|
p = "TAIL";
|
|
break;
|
|
case BACK:
|
|
p = "BACK";
|
|
break;
|
|
case END:
|
|
p = "END";
|
|
break;
|
|
case BOUND:
|
|
p = "BOUND";
|
|
break;
|
|
case BOUNDL:
|
|
p = "BOUNDL";
|
|
break;
|
|
case NBOUND:
|
|
p = "NBOUND";
|
|
break;
|
|
case NBOUNDL:
|
|
p = "NBOUNDL";
|
|
break;
|
|
case CURLY:
|
|
sv_catpvf(sv, "CURLY {%d,%d}", ARG1(o), ARG2(o));
|
|
break;
|
|
case CURLYM:
|
|
sv_catpvf(sv, "CURLYM[%d] {%d,%d}", o->flags, ARG1(o), ARG2(o));
|
|
break;
|
|
case CURLYN:
|
|
sv_catpvf(sv, "CURLYN[%d] {%d,%d}", o->flags, ARG1(o), ARG2(o));
|
|
break;
|
|
case CURLYX:
|
|
sv_catpvf(sv, "CURLYX {%d,%d}", ARG1(o), ARG2(o));
|
|
break;
|
|
case REF:
|
|
sv_catpvf(sv, "REF%d", ARG(o));
|
|
break;
|
|
case REFF:
|
|
sv_catpvf(sv, "REFF%d", ARG(o));
|
|
break;
|
|
case REFFL:
|
|
sv_catpvf(sv, "REFFL%d", ARG(o));
|
|
break;
|
|
case OPEN:
|
|
sv_catpvf(sv, "OPEN%d", ARG(o));
|
|
break;
|
|
case CLOSE:
|
|
sv_catpvf(sv, "CLOSE%d", ARG(o));
|
|
p = NULL;
|
|
break;
|
|
case STAR:
|
|
p = "STAR";
|
|
break;
|
|
case PLUS:
|
|
p = "PLUS";
|
|
break;
|
|
case MINMOD:
|
|
p = "MINMOD";
|
|
break;
|
|
case GPOS:
|
|
p = "GPOS";
|
|
break;
|
|
case UNLESSM:
|
|
sv_catpvf(sv, "UNLESSM[-%d]", o->flags);
|
|
break;
|
|
case IFMATCH:
|
|
sv_catpvf(sv, "IFMATCH[-%d]", o->flags);
|
|
break;
|
|
case SUCCEED:
|
|
p = "SUCCEED";
|
|
break;
|
|
case WHILEM:
|
|
p = "WHILEM";
|
|
break;
|
|
case DIGIT:
|
|
p = "DIGIT";
|
|
break;
|
|
case NDIGIT:
|
|
p = "NDIGIT";
|
|
break;
|
|
case ALNUM:
|
|
p = "ALNUM";
|
|
break;
|
|
case NALNUM:
|
|
p = "NALNUM";
|
|
break;
|
|
case SPACE:
|
|
p = "SPACE";
|
|
break;
|
|
case NSPACE:
|
|
p = "NSPACE";
|
|
break;
|
|
case ALNUML:
|
|
p = "ALNUML";
|
|
break;
|
|
case NALNUML:
|
|
p = "NALNUML";
|
|
break;
|
|
case SPACEL:
|
|
p = "SPACEL";
|
|
break;
|
|
case NSPACEL:
|
|
p = "NSPACEL";
|
|
break;
|
|
case EVAL:
|
|
p = "EVAL";
|
|
break;
|
|
case LONGJMP:
|
|
p = "LONGJMP";
|
|
break;
|
|
case BRANCHJ:
|
|
p = "BRANCHJ";
|
|
break;
|
|
case IFTHEN:
|
|
p = "IFTHEN";
|
|
break;
|
|
case GROUPP:
|
|
sv_catpvf(sv, "GROUPP%d", ARG(o));
|
|
break;
|
|
case LOGICAL:
|
|
p = "LOGICAL";
|
|
break;
|
|
case SUSPEND:
|
|
p = "SUSPEND";
|
|
break;
|
|
case RENUM:
|
|
p = "RENUM";
|
|
break;
|
|
case OPTIMIZED:
|
|
p = "OPTIMIZED";
|
|
break;
|
|
default:
|
|
FAIL("corrupted regexp opcode");
|
|
}
|
|
if (p)
|
|
sv_catpv(sv, p);
|
|
#endif /* DEBUGGING */
|
|
}
|
|
|
|
void
|
|
pregfree(struct regexp *r)
|
|
{
|
|
dTHR;
|
|
if (!r || (--r->refcnt > 0))
|
|
return;
|
|
if (r->precomp)
|
|
Safefree(r->precomp);
|
|
if (r->subbase)
|
|
Safefree(r->subbase);
|
|
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;
|
|
while (--n >= 0) {
|
|
switch (r->data->what[n]) {
|
|
case 's':
|
|
SvREFCNT_dec((SV*)r->data->data[n]);
|
|
break;
|
|
case 'o':
|
|
op_free((OP_4tree*)r->data->data[n]);
|
|
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 *
|
|
regnext(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
|
|
re_croak2(const char* pat1,const char* pat2,...)
|
|
{
|
|
va_list args;
|
|
STRLEN l1 = strlen(pat1);
|
|
STRLEN l2 = strlen(pat2);
|
|
char buf[512];
|
|
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';
|
|
va_start(args, pat2);
|
|
message = mess(buf, &args);
|
|
va_end(args);
|
|
l1 = strlen(message);
|
|
if (l1 > 512)
|
|
l1 = 512;
|
|
Copy(message, buf, l1 , char);
|
|
buf[l1] = '\0'; /* Overwrite \n */
|
|
croak("%s", buf);
|
|
}
|