1 | /* regexp.h
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2 | *
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3 | * Copyright (C) 1993, 1994, 1996, 1997, 1999, 2000, 2001, 2003,
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4 | * by Larry Wall and others
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5 | *
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6 | * You may distribute under the terms of either the GNU General Public
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7 | * License or the Artistic License, as specified in the README file.
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8 | *
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9 | */
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10 |
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11 | /*
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12 | * Definitions etc. for regexp(3) routines.
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13 | *
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14 | * Caveat: this is V8 regexp(3) [actually, a reimplementation thereof],
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15 | * not the System V one.
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16 | */
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17 |
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18 |
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19 | struct regnode {
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20 | U8 flags;
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21 | U8 type;
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22 | U16 next_off;
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23 | };
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24 |
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25 | typedef struct regnode regnode;
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26 |
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27 | struct reg_substr_data;
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28 |
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29 | struct reg_data;
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30 |
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31 | typedef struct regexp {
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32 | I32 *startp;
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33 | I32 *endp;
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34 | regnode *regstclass;
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35 | struct reg_substr_data *substrs;
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36 | char *precomp; /* pre-compilation regular expression */
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37 | struct reg_data *data; /* Additional data. */
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38 | char *subbeg; /* saved or original string
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39 | so \digit works forever. */
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40 | U32 *offsets; /* offset annotations 20001228 MJD */
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41 | I32 sublen; /* Length of string pointed by subbeg */
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42 | I32 refcnt;
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43 | I32 minlen; /* mininum possible length of $& */
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44 | I32 prelen; /* length of precomp */
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45 | U32 nparens; /* number of parentheses */
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46 | U32 lastparen; /* last paren matched */
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47 | U32 lastcloseparen; /* last paren matched */
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48 | U32 reganch; /* Internal use only +
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49 | Tainted information used by regexec? */
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50 | regnode program[1]; /* Unwarranted chumminess with compiler. */
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51 | } regexp;
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52 |
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53 | #define ROPT_ANCH (ROPT_ANCH_BOL|ROPT_ANCH_MBOL|ROPT_ANCH_GPOS|ROPT_ANCH_SBOL)
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54 | #define ROPT_ANCH_SINGLE (ROPT_ANCH_SBOL|ROPT_ANCH_GPOS)
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55 | #define ROPT_ANCH_BOL 0x00001
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56 | #define ROPT_ANCH_MBOL 0x00002
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57 | #define ROPT_ANCH_SBOL 0x00004
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58 | #define ROPT_ANCH_GPOS 0x00008
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59 | #define ROPT_SKIP 0x00010
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60 | #define ROPT_IMPLICIT 0x00020 /* Converted .* to ^.* */
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61 | #define ROPT_NOSCAN 0x00040 /* Check-string always at start. */
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62 | #define ROPT_GPOS_SEEN 0x00080
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63 | #define ROPT_CHECK_ALL 0x00100
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64 | #define ROPT_LOOKBEHIND_SEEN 0x00200
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65 | #define ROPT_EVAL_SEEN 0x00400
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66 | #define ROPT_CANY_SEEN 0x00800
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67 | #define ROPT_SANY_SEEN ROPT_CANY_SEEN /* src bckwrd cmpt */
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68 |
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69 | /* 0xf800 of reganch is used by PMf_COMPILETIME */
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70 |
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71 | #define ROPT_UTF8 0x10000
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72 | #define ROPT_NAUGHTY 0x20000 /* how exponential is this pattern? */
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73 | #define ROPT_COPY_DONE 0x40000 /* subbeg is a copy of the string */
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74 | #define ROPT_TAINTED_SEEN 0x80000
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75 | #define ROPT_MATCH_UTF8 0x10000000 /* subbeg is utf-8 */
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76 |
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77 | #define RE_USE_INTUIT_NOML 0x0100000 /* Best to intuit before matching */
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78 | #define RE_USE_INTUIT_ML 0x0200000
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79 | #define REINT_AUTORITATIVE_NOML 0x0400000 /* Can trust a positive answer */
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80 | #define REINT_AUTORITATIVE_ML 0x0800000
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81 | #define REINT_ONCE_NOML 0x1000000 /* Intuit can succed once only. */
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82 | #define REINT_ONCE_ML 0x2000000
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83 | #define RE_INTUIT_ONECHAR 0x4000000
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84 | #define RE_INTUIT_TAIL 0x8000000
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85 |
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86 | #define RE_USE_INTUIT (RE_USE_INTUIT_NOML|RE_USE_INTUIT_ML)
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87 | #define REINT_AUTORITATIVE (REINT_AUTORITATIVE_NOML|REINT_AUTORITATIVE_ML)
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88 | #define REINT_ONCE (REINT_ONCE_NOML|REINT_ONCE_ML)
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89 |
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90 | #define RX_MATCH_TAINTED(prog) ((prog)->reganch & ROPT_TAINTED_SEEN)
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91 | #define RX_MATCH_TAINTED_on(prog) ((prog)->reganch |= ROPT_TAINTED_SEEN)
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92 | #define RX_MATCH_TAINTED_off(prog) ((prog)->reganch &= ~ROPT_TAINTED_SEEN)
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93 | #define RX_MATCH_TAINTED_set(prog, t) ((t) \
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94 | ? RX_MATCH_TAINTED_on(prog) \
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95 | : RX_MATCH_TAINTED_off(prog))
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96 |
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97 | #define RX_MATCH_COPIED(prog) ((prog)->reganch & ROPT_COPY_DONE)
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98 | #define RX_MATCH_COPIED_on(prog) ((prog)->reganch |= ROPT_COPY_DONE)
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99 | #define RX_MATCH_COPIED_off(prog) ((prog)->reganch &= ~ROPT_COPY_DONE)
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100 | #define RX_MATCH_COPIED_set(prog,t) ((t) \
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101 | ? RX_MATCH_COPIED_on(prog) \
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102 | : RX_MATCH_COPIED_off(prog))
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103 |
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104 | #define RX_MATCH_UTF8(prog) ((prog)->reganch & ROPT_MATCH_UTF8)
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105 | #define RX_MATCH_UTF8_on(prog) ((prog)->reganch |= ROPT_MATCH_UTF8)
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106 | #define RX_MATCH_UTF8_off(prog) ((prog)->reganch &= ~ROPT_MATCH_UTF8)
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107 | #define RX_MATCH_UTF8_set(prog, t) ((t) \
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108 | ? (RX_MATCH_UTF8_on(prog), (PL_reg_match_utf8 = 1)) \
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109 | : (RX_MATCH_UTF8_off(prog), (PL_reg_match_utf8 = 0)))
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110 |
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111 | #define REXEC_COPY_STR 0x01 /* Need to copy the string. */
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112 | #define REXEC_CHECKED 0x02 /* check_substr already checked. */
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113 | #define REXEC_SCREAM 0x04 /* use scream table. */
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114 | #define REXEC_IGNOREPOS 0x08 /* \G matches at start. */
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115 | #define REXEC_NOT_FIRST 0x10 /* This is another iteration of //g. */
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116 | #define REXEC_ML 0x20 /* $* was set. */
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117 |
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118 | #define ReREFCNT_inc(re) ((void)(re && re->refcnt++), re)
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119 | #define ReREFCNT_dec(re) CALLREGFREE(aTHX_ re)
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120 |
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121 | #define FBMcf_TAIL_DOLLAR 1
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122 | #define FBMcf_TAIL_DOLLARM 2
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123 | #define FBMcf_TAIL_Z 4
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124 | #define FBMcf_TAIL_z 8
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125 | #define FBMcf_TAIL (FBMcf_TAIL_DOLLAR|FBMcf_TAIL_DOLLARM|FBMcf_TAIL_Z|FBMcf_TAIL_z)
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126 |
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127 | #define FBMrf_MULTILINE 1
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128 |
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129 | struct re_scream_pos_data_s;
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