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shup up warnings about dNOOP from gcc with __attribute__ ((unused))
[perl5.git] / regexp.h
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1/* regexp.h
2 */
3
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4/*
5 * Definitions etc. for regexp(3) routines.
6 *
7 * Caveat: this is V8 regexp(3) [actually, a reimplementation thereof],
8 * not the System V one.
9 */
10
378cc40b 11
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12struct regnode {
13 U8 flags;
14 U8 type;
15 U16 next_off;
16};
17
18typedef struct regnode regnode;
19
cad2e5aa 20struct reg_substr_data;
2779dcf1 21
378cc40b 22typedef struct regexp {
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23 I32 *startp;
24 I32 *endp;
c277df42 25 regnode *regstclass;
2779dcf1 26 struct reg_substr_data *substrs;
cf93c79d 27 char *precomp; /* pre-compilation regular expression */
c277df42 28 struct reg_data *data; /* Additional data. */
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29 char *subbeg; /* saved or original string
30 so \digit works forever. */
31 I32 sublen; /* Length of string pointed by subbeg */
32 I32 refcnt;
33 I32 minlen; /* mininum possible length of $& */
34 I32 prelen; /* length of precomp */
35 U32 nparens; /* number of parentheses */
36 U32 lastparen; /* last paren matched */
37 U32 reganch; /* Internal use only +
38 Tainted information used by regexec? */
c277df42 39 regnode program[1]; /* Unwarranted chumminess with compiler. */
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40} regexp;
41
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42#define ROPT_ANCH (ROPT_ANCH_BOL|ROPT_ANCH_MBOL|ROPT_ANCH_GPOS|ROPT_ANCH_SBOL)
43#define ROPT_ANCH_SINGLE (ROPT_ANCH_SBOL|ROPT_ANCH_GPOS)
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44#define ROPT_ANCH_BOL 0x00001
45#define ROPT_ANCH_MBOL 0x00002
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46#define ROPT_ANCH_SBOL 0x00004
47#define ROPT_ANCH_GPOS 0x00008
48#define ROPT_SKIP 0x00010
49#define ROPT_IMPLICIT 0x00020 /* Converted .* to ^.* */
50#define ROPT_NOSCAN 0x00040 /* Check-string always at start. */
51#define ROPT_GPOS_SEEN 0x00080
52#define ROPT_CHECK_ALL 0x00100
53#define ROPT_LOOKBEHIND_SEEN 0x00200
54#define ROPT_EVAL_SEEN 0x00400
a0ed51b3 55
8782bef2 56/* 0xf800 of reganch is used by PMf_COMPILETIME */
c277df42 57
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58#define ROPT_UTF8 0x10000
59#define ROPT_NAUGHTY 0x20000 /* how exponential is this pattern? */
cf93c79d 60#define ROPT_COPY_DONE 0x40000 /* subbeg is a copy of the string */
bc9a0d2c 61#define ROPT_TAINTED_SEEN 0x80000
a0ed51b3 62
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63#define RE_USE_INTUIT_NOML 0x0100000 /* Best to intuit before matching */
64#define RE_USE_INTUIT_ML 0x0200000
65#define REINT_AUTORITATIVE_NOML 0x0400000 /* Can trust a positive answer */
66#define REINT_AUTORITATIVE_ML 0x0800000
67#define REINT_ONCE_NOML 0x1000000 /* Intuit can succed once only. */
68#define REINT_ONCE_ML 0x2000000
69#define RE_INTUIT_ONECHAR 0x4000000
70#define RE_INTUIT_TAIL 0x8000000
71
72#define RE_USE_INTUIT (RE_USE_INTUIT_NOML|RE_USE_INTUIT_ML)
73#define REINT_AUTORITATIVE (REINT_AUTORITATIVE_NOML|REINT_AUTORITATIVE_ML)
74#define REINT_ONCE (REINT_ONCE_NOML|REINT_ONCE_ML)
75
c277df42 76#define RX_MATCH_TAINTED(prog) ((prog)->reganch & ROPT_TAINTED_SEEN)
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77#define RX_MATCH_TAINTED_on(prog) ((prog)->reganch |= ROPT_TAINTED_SEEN)
78#define RX_MATCH_TAINTED_off(prog) ((prog)->reganch &= ~ROPT_TAINTED_SEEN)
79#define RX_MATCH_TAINTED_set(prog, t) ((t) \
80 ? RX_MATCH_TAINTED_on(prog) \
81 : RX_MATCH_TAINTED_off(prog))
c277df42 82
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83#define RX_MATCH_COPIED(prog) ((prog)->reganch & ROPT_COPY_DONE)
84#define RX_MATCH_COPIED_on(prog) ((prog)->reganch |= ROPT_COPY_DONE)
85#define RX_MATCH_COPIED_off(prog) ((prog)->reganch &= ~ROPT_COPY_DONE)
86#define RX_MATCH_COPIED_set(prog,t) ((t) \
87 ? RX_MATCH_COPIED_on(prog) \
88 : RX_MATCH_COPIED_off(prog))
89
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90#define REXEC_COPY_STR 0x01 /* Need to copy the string. */
91#define REXEC_CHECKED 0x02 /* check_substr already checked. */
92#define REXEC_SCREAM 0x04 /* use scream table. */
93#define REXEC_IGNOREPOS 0x08 /* \G matches at start. */
cf93c79d 94#define REXEC_NOT_FIRST 0x10 /* This is another iteration of //g. */
cad2e5aa 95#define REXEC_ML 0x20 /* $* was set. */
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96
97#define ReREFCNT_inc(re) ((re && re->refcnt++), re)
cad2e5aa 98#define ReREFCNT_dec(re) CALLREGFREE(aTHX_ re)
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99
100#define FBMcf_TAIL_DOLLAR 1
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101#define FBMcf_TAIL_DOLLARM 2
102#define FBMcf_TAIL_Z 4
103#define FBMcf_TAIL_z 8
104#define FBMcf_TAIL (FBMcf_TAIL_DOLLAR|FBMcf_TAIL_DOLLARM|FBMcf_TAIL_Z|FBMcf_TAIL_z)
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105
106#define FBMrf_MULTILINE 1
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107
108struct re_scream_pos_data_s;