5 * Definitions etc. for regexp(3) routines.
7 * Caveat: this is V8 regexp(3) [actually, a reimplementation thereof],
8 * not the System V one.
18 typedef struct regnode regnode;
26 struct reg_substr_datum {
32 struct reg_substr_data {
33 struct reg_substr_datum data[3]; /* Actual array */
36 typedef struct regexp {
41 I32 minlen; /* mininum possible length of $& */
42 I32 prelen; /* length of precomp */
43 U32 nparens; /* number of parentheses */
44 U32 lastparen; /* last paren matched */
45 char *precomp; /* pre-compilation regular expression */
46 char *subbase; /* saved string so \digit works forever */
47 char *subbeg; /* same, but not responsible for allocation */
48 char *subend; /* end of subbase */
49 U32 reganch; /* Internal use only +
50 Tainted information used by regexec? */
52 SV *anchored_substr; /* Substring at fixed position wrt start. */
53 I32 anchored_offset; /* Position of it. */
54 SV *float_substr; /* Substring at variable position wrt start. */
55 I32 float_min_offset; /* Minimal position of it. */
56 I32 float_max_offset; /* Maximal position of it. */
57 SV *check_substr; /* Substring to check before matching. */
58 I32 check_offset_min; /* Offset of the above. */
59 I32 check_offset_max; /* Offset of the above. */
61 struct reg_substr_data *substrs;
63 struct reg_data *data; /* Additional data. */
64 regnode program[1]; /* Unwarranted chumminess with compiler. */
67 #define anchored_substr substrs->data[0].substr
68 #define anchored_offset substrs->data[0].min_offset
69 #define float_substr substrs->data[1].substr
70 #define float_min_offset substrs->data[1].min_offset
71 #define float_max_offset substrs->data[1].max_offset
72 #define check_substr substrs->data[2].substr
73 #define check_offset_min substrs->data[2].min_offset
74 #define check_offset_max substrs->data[2].max_offset
76 #define ROPT_ANCH (ROPT_ANCH_BOL|ROPT_ANCH_MBOL|ROPT_ANCH_GPOS)
77 #define ROPT_ANCH_SINGLE (ROPT_ANCH_BOL|ROPT_ANCH_GPOS)
78 #define ROPT_ANCH_BOL 0x00001
79 #define ROPT_ANCH_MBOL 0x00002
80 #define ROPT_ANCH_GPOS 0x00004
81 #define ROPT_SKIP 0x00008
82 #define ROPT_IMPLICIT 0x00010 /* Converted .* to ^.* */
83 #define ROPT_NOSCAN 0x00020 /* Check-string always at start. */
84 #define ROPT_GPOS_SEEN 0x00040
85 #define ROPT_CHECK_ALL 0x00080
86 #define ROPT_LOOKBEHIND_SEEN 0x00100
87 #define ROPT_EVAL_SEEN 0x00200
88 #define ROPT_TAINTED_SEEN 0x00400
89 #define ROPT_ANCH_SBOL 0x00800
91 /* 0xf800 of reganch is used by PMf_COMPILETIME */
93 #define ROPT_UTF8 0x10000
94 #define ROPT_NAUGHTY 0x20000 /* how exponential is this pattern? */
96 #define RX_MATCH_TAINTED(prog) ((prog)->reganch & ROPT_TAINTED_SEEN)
97 #define RX_MATCH_TAINTED_on(prog) ((prog)->reganch |= ROPT_TAINTED_SEEN)
98 #define RX_MATCH_TAINTED_off(prog) ((prog)->reganch &= ~ROPT_TAINTED_SEEN)
99 #define RX_MATCH_TAINTED_set(prog, t) ((t) \
100 ? RX_MATCH_TAINTED_on(prog) \
101 : RX_MATCH_TAINTED_off(prog))
103 #define REXEC_COPY_STR 1 /* Need to copy the string. */
104 #define REXEC_CHECKED 2 /* check_substr already checked. */
105 #define REXEC_SCREAM 4 /* use scream table. */
107 #define ReREFCNT_inc(re) ((re && re->refcnt++), re)
108 #define ReREFCNT_dec(re) pregfree(re)