3 * Copyright (c) 1997-2002, Larry Wall
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
11 * Definitions etc. for regexp(3) routines.
13 * Caveat: this is V8 regexp(3) [actually, a reimplementation thereof],
14 * not the System V one.
24 typedef struct regnode regnode;
26 struct reg_substr_data;
30 typedef struct regexp {
34 struct reg_substr_data *substrs;
35 char *precomp; /* pre-compilation regular expression */
36 struct reg_data *data; /* Additional data. */
37 char *subbeg; /* saved or original string
38 so \digit works forever. */
39 #ifdef PERL_COPY_ON_WRITE
40 SV *saved_copy; /* If non-NULL, SV which is COW from original */
42 U32 *offsets; /* offset annotations 20001228 MJD */
43 I32 sublen; /* Length of string pointed by subbeg */
45 I32 minlen; /* mininum possible length of $& */
46 I32 prelen; /* length of precomp */
47 U32 nparens; /* number of parentheses */
48 U32 lastparen; /* last paren matched */
49 U32 lastcloseparen; /* last paren matched */
50 U32 reganch; /* Internal use only +
51 Tainted information used by regexec? */
52 regnode program[1]; /* Unwarranted chumminess with compiler. */
55 #define ROPT_ANCH (ROPT_ANCH_BOL|ROPT_ANCH_MBOL|ROPT_ANCH_GPOS|ROPT_ANCH_SBOL)
56 #define ROPT_ANCH_SINGLE (ROPT_ANCH_SBOL|ROPT_ANCH_GPOS)
57 #define ROPT_ANCH_BOL 0x00001
58 #define ROPT_ANCH_MBOL 0x00002
59 #define ROPT_ANCH_SBOL 0x00004
60 #define ROPT_ANCH_GPOS 0x00008
61 #define ROPT_SKIP 0x00010
62 #define ROPT_IMPLICIT 0x00020 /* Converted .* to ^.* */
63 #define ROPT_NOSCAN 0x00040 /* Check-string always at start. */
64 #define ROPT_GPOS_SEEN 0x00080
65 #define ROPT_CHECK_ALL 0x00100
66 #define ROPT_LOOKBEHIND_SEEN 0x00200
67 #define ROPT_EVAL_SEEN 0x00400
68 #define ROPT_CANY_SEEN 0x00800
69 #define ROPT_SANY_SEEN ROPT_CANY_SEEN /* src bckwrd cmpt */
71 /* 0xf800 of reganch is used by PMf_COMPILETIME */
73 #define ROPT_UTF8 0x10000
74 #define ROPT_NAUGHTY 0x20000 /* how exponential is this pattern? */
75 #define ROPT_COPY_DONE 0x40000 /* subbeg is a copy of the string */
76 #define ROPT_TAINTED_SEEN 0x80000
77 #define ROPT_MATCH_UTF8 0x10000000 /* subbeg is utf-8 */
79 #define RE_USE_INTUIT_NOML 0x0100000 /* Best to intuit before matching */
80 #define RE_USE_INTUIT_ML 0x0200000
81 #define REINT_AUTORITATIVE_NOML 0x0400000 /* Can trust a positive answer */
82 #define REINT_AUTORITATIVE_ML 0x0800000
83 #define REINT_ONCE_NOML 0x1000000 /* Intuit can succed once only. */
84 #define REINT_ONCE_ML 0x2000000
85 #define RE_INTUIT_ONECHAR 0x4000000
86 #define RE_INTUIT_TAIL 0x8000000
88 #define RE_USE_INTUIT (RE_USE_INTUIT_NOML|RE_USE_INTUIT_ML)
89 #define REINT_AUTORITATIVE (REINT_AUTORITATIVE_NOML|REINT_AUTORITATIVE_ML)
90 #define REINT_ONCE (REINT_ONCE_NOML|REINT_ONCE_ML)
92 #define RX_MATCH_TAINTED(prog) ((prog)->reganch & ROPT_TAINTED_SEEN)
93 #define RX_MATCH_TAINTED_on(prog) ((prog)->reganch |= ROPT_TAINTED_SEEN)
94 #define RX_MATCH_TAINTED_off(prog) ((prog)->reganch &= ~ROPT_TAINTED_SEEN)
95 #define RX_MATCH_TAINTED_set(prog, t) ((t) \
96 ? RX_MATCH_TAINTED_on(prog) \
97 : RX_MATCH_TAINTED_off(prog))
99 #define RX_MATCH_COPIED(prog) ((prog)->reganch & ROPT_COPY_DONE)
100 #define RX_MATCH_COPIED_on(prog) ((prog)->reganch |= ROPT_COPY_DONE)
101 #define RX_MATCH_COPIED_off(prog) ((prog)->reganch &= ~ROPT_COPY_DONE)
102 #define RX_MATCH_COPIED_set(prog,t) ((t) \
103 ? RX_MATCH_COPIED_on(prog) \
104 : RX_MATCH_COPIED_off(prog))
106 #ifdef PERL_COPY_ON_WRITE
107 #define RX_MATCH_COPY_FREE(rx) \
108 STMT_START {if (rx->saved_copy) { \
109 SV_CHECK_THINKFIRST_COW_DROP(rx->saved_copy); \
111 if (RX_MATCH_COPIED(rx)) { \
112 Safefree(rx->subbeg); \
113 RX_MATCH_COPIED_off(rx); \
116 #define RX_MATCH_COPY_FREE(rx) \
117 STMT_START {if (RX_MATCH_COPIED(rx)) { \
118 Safefree(rx->subbeg); \
119 RX_MATCH_COPIED_off(rx); \
123 #define RX_MATCH_UTF8(prog) ((prog)->reganch & ROPT_MATCH_UTF8)
124 #define RX_MATCH_UTF8_on(prog) ((prog)->reganch |= ROPT_MATCH_UTF8)
125 #define RX_MATCH_UTF8_off(prog) ((prog)->reganch &= ~ROPT_MATCH_UTF8)
126 #define RX_MATCH_UTF8_set(prog, t) ((t) \
127 ? (RX_MATCH_UTF8_on(prog), (PL_reg_match_utf8 = 1)) \
128 : (RX_MATCH_UTF8_off(prog), (PL_reg_match_utf8 = 0)))
130 #define REXEC_COPY_STR 0x01 /* Need to copy the string. */
131 #define REXEC_CHECKED 0x02 /* check_substr already checked. */
132 #define REXEC_SCREAM 0x04 /* use scream table. */
133 #define REXEC_IGNOREPOS 0x08 /* \G matches at start. */
134 #define REXEC_NOT_FIRST 0x10 /* This is another iteration of //g. */
135 #define REXEC_ML 0x20 /* $* was set. */
137 #define ReREFCNT_inc(re) ((void)(re && re->refcnt++), re)
138 #define ReREFCNT_dec(re) CALLREGFREE(aTHX_ re)
140 #define FBMcf_TAIL_DOLLAR 1
141 #define FBMcf_TAIL_DOLLARM 2
142 #define FBMcf_TAIL_Z 4
143 #define FBMcf_TAIL_z 8
144 #define FBMcf_TAIL (FBMcf_TAIL_DOLLAR|FBMcf_TAIL_DOLLARM|FBMcf_TAIL_Z|FBMcf_TAIL_z)
146 #define FBMrf_MULTILINE 1
148 struct re_scream_pos_data_s;