+/* regexp.h
+ */
+
/*
* Definitions etc. for regexp(3) routines.
*
* not the System V one.
*/
-/* $RCSfile: regexp.h,v $$Revision: 4.1 $$Date: 92/08/07 18:26:35 $
- *
- * $Log: regexp.h,v $
- * Revision 4.1 92/08/07 18:26:35 lwall
- *
- * Revision 4.0.1.2 91/11/05 18:24:31 lwall
- * patch11: minimum match length calculation in regexp is now cumulative
- * patch11: initial .* in pattern had dependency on value of $*
- *
- * Revision 4.0.1.1 91/06/07 11:51:18 lwall
- * patch4: new copyright notice
- * patch4: // wouldn't use previous pattern if it started with a null character
- * patch4: $` was busted inside s///
- *
- * Revision 4.0 91/03/20 01:39:23 lwall
- * 4.0 baseline.
- *
- */
+
+struct regnode {
+ U8 flags;
+ U8 type;
+ U16 next_off;
+};
+
+typedef struct regnode regnode;
+
+struct reg_data {
+ U32 count;
+ U8 *what;
+ void* data[1];
+};
+
+struct reg_substr_datum {
+ I32 min_offset;
+ I32 max_offset;
+ SV *substr;
+};
+
+struct reg_substr_data {
+ struct reg_substr_datum data[3]; /* Actual array */
+};
typedef struct regexp {
+ I32 refcnt;
char **startp;
char **endp;
- SV *regstart; /* Internal use only. */
- char *regstclass;
- SV *regmust; /* Internal use only. */
- I32 regback; /* Can regmust locate first try? */
+ regnode *regstclass;
I32 minlen; /* mininum possible length of $& */
I32 prelen; /* length of precomp */
+ U32 nparens; /* number of parentheses */
+ U32 lastparen; /* last paren matched */
char *precomp; /* pre-compilation regular expression */
char *subbase; /* saved string so \digit works forever */
char *subbeg; /* same, but not responsible for allocation */
char *subend; /* end of subbase */
- char reganch; /* Internal use only. */
- char do_folding; /* do case-insensitive match? */
- char lastparen; /* last paren matched */
- char nparens; /* number of parentheses */
- char program[1]; /* Unwarranted chumminess with compiler. */
+ U32 reganch; /* Internal use only +
+ Tainted information used by regexec? */
+#if 0
+ SV *anchored_substr; /* Substring at fixed position wrt start. */
+ I32 anchored_offset; /* Position of it. */
+ SV *float_substr; /* Substring at variable position wrt start. */
+ I32 float_min_offset; /* Minimal position of it. */
+ I32 float_max_offset; /* Maximal position of it. */
+ SV *check_substr; /* Substring to check before matching. */
+ I32 check_offset_min; /* Offset of the above. */
+ I32 check_offset_max; /* Offset of the above. */
+#else
+ struct reg_substr_data *substrs;
+#endif
+ struct reg_data *data; /* Additional data. */
+ regnode program[1]; /* Unwarranted chumminess with compiler. */
} regexp;
-#define ROPT_ANCH 1
-#define ROPT_SKIP 2
-#define ROPT_IMPLICIT 4
+#define anchored_substr substrs->data[0].substr
+#define anchored_offset substrs->data[0].min_offset
+#define float_substr substrs->data[1].substr
+#define float_min_offset substrs->data[1].min_offset
+#define float_max_offset substrs->data[1].max_offset
+#define check_substr substrs->data[2].substr
+#define check_offset_min substrs->data[2].min_offset
+#define check_offset_max substrs->data[2].max_offset
+
+#define ROPT_ANCH (ROPT_ANCH_BOL|ROPT_ANCH_MBOL|ROPT_ANCH_GPOS)
+#define ROPT_ANCH_SINGLE (ROPT_ANCH_BOL|ROPT_ANCH_GPOS)
+#define ROPT_ANCH_BOL 0x00001
+#define ROPT_ANCH_MBOL 0x00002
+#define ROPT_ANCH_GPOS 0x00004
+#define ROPT_SKIP 0x00008
+#define ROPT_IMPLICIT 0x00010 /* Converted .* to ^.* */
+#define ROPT_NOSCAN 0x00020 /* Check-string always at start. */
+#define ROPT_GPOS_SEEN 0x00040
+#define ROPT_CHECK_ALL 0x00080
+#define ROPT_LOOKBEHIND_SEEN 0x00100
+#define ROPT_EVAL_SEEN 0x00200
+#define ROPT_TAINTED_SEEN 0x00400
+#define ROPT_ANCH_SBOL 0x00800
+
+/* 0xf800 of reganch is used by PMf_COMPILETIME */
+
+#define ROPT_UTF8 0x10000
+#define ROPT_NAUGHTY 0x20000 /* how exponential is this pattern? */
+
+#define RX_MATCH_TAINTED(prog) ((prog)->reganch & ROPT_TAINTED_SEEN)
+#define RX_MATCH_TAINTED_on(prog) ((prog)->reganch |= ROPT_TAINTED_SEEN)
+#define RX_MATCH_TAINTED_off(prog) ((prog)->reganch &= ~ROPT_TAINTED_SEEN)
+#define RX_MATCH_TAINTED_set(prog, t) ((t) \
+ ? RX_MATCH_TAINTED_on(prog) \
+ : RX_MATCH_TAINTED_off(prog))
+
+#define REXEC_COPY_STR 1 /* Need to copy the string. */
+#define REXEC_CHECKED 2 /* check_substr already checked. */
+#define REXEC_SCREAM 4 /* use scream table. */
+
+#define ReREFCNT_inc(re) ((re && re->refcnt++), re)
+#define ReREFCNT_dec(re) pregfree(re)