Mercurial > vim
annotate src/regexp.h @ 6874:a89cff862dda v7.4.757
patch 7.4.757
Problem: Cannot detect the background color of a terminal.
Solution: Add T_RBG to request the background color if possible. (Lubomir
Rintel)
| author | Bram Moolenaar <bram@vim.org> |
|---|---|
| date | Thu, 25 Jun 2015 17:03:36 +0200 |
| parents | adfbffe1e642 |
| children | 4aead6a9b7a9 |
| rev | line source |
|---|---|
| 7 | 1 /* vi:set ts=8 sts=4 sw=4: |
| 2 * | |
| 3 * NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE | |
| 4 * | |
| 5 * This is NOT the original regular expression code as written by Henry | |
| 6 * Spencer. This code has been modified specifically for use with Vim, and | |
| 7 * should not be used apart from compiling Vim. If you want a good regular | |
| 8 * expression library, get the original code. | |
| 9 * | |
| 10 * NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE | |
| 11 */ | |
| 12 | |
| 13 #ifndef _REGEXP_H | |
| 14 #define _REGEXP_H | |
| 15 | |
| 16 /* | |
| 17 * The number of sub-matches is limited to 10. | |
| 18 * The first one (index 0) is the whole match, referenced with "\0". | |
| 19 * The second one (index 1) is the first sub-match, referenced with "\1". | |
| 20 * This goes up to the tenth (index 9), referenced with "\9". | |
| 21 */ | |
| 22 #define NSUBEXP 10 | |
| 23 | |
| 24 /* | |
| 4444 | 25 * In the NFA engine: how many braces are allowed. |
| 26 * TODO(RE): Use dynamic memory allocation instead of static, like here | |
| 27 */ | |
| 28 #define NFA_MAX_BRACES 20 | |
| 29 | |
| 6328 | 30 /* |
| 31 * In the NFA engine: how many states are allowed | |
| 32 */ | |
| 33 #define NFA_MAX_STATES 100000 | |
| 34 #define NFA_TOO_EXPENSIVE -1 | |
| 35 | |
| 36 /* Which regexp engine to use? Needed for vim_regcomp(). | |
| 37 * Must match with 'regexpengine'. */ | |
| 38 #define AUTOMATIC_ENGINE 0 | |
| 39 #define BACKTRACKING_ENGINE 1 | |
| 40 #define NFA_ENGINE 2 | |
| 41 | |
| 4444 | 42 typedef struct regengine regengine_T; |
| 43 | |
| 44 /* | |
| 7 | 45 * Structure returned by vim_regcomp() to pass on to vim_regexec(). |
| 4444 | 46 * This is the general structure. For the actual matcher, two specific |
| 47 * structures are used. See code below. | |
| 48 */ | |
| 49 typedef struct regprog | |
| 50 { | |
| 51 regengine_T *engine; | |
| 52 unsigned regflags; | |
| 6328 | 53 unsigned re_engine; /* automatic, backtracking or nfa engine */ |
| 54 unsigned re_flags; /* second argument for vim_regcomp() */ | |
| 4444 | 55 } regprog_T; |
| 56 | |
| 57 /* | |
| 58 * Structure used by the back track matcher. | |
| 7 | 59 * These fields are only to be used in regexp.c! |
| 4444 | 60 * See regexp.c for an explanation. |
| 7 | 61 */ |
| 62 typedef struct | |
| 63 { | |
| 6328 | 64 /* These four members implement regprog_T */ |
| 4444 | 65 regengine_T *engine; |
| 66 unsigned regflags; | |
| 6328 | 67 unsigned re_engine; |
| 68 unsigned re_flags; /* second argument for vim_regcomp() */ | |
| 4444 | 69 |
| 7 | 70 int regstart; |
| 71 char_u reganch; | |
| 72 char_u *regmust; | |
| 73 int regmlen; | |
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74 #ifdef FEAT_SYN_HL |
| 4444 | 75 char_u reghasz; |
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76 #endif |
| 4444 | 77 char_u program[1]; /* actually longer.. */ |
| 78 } bt_regprog_T; | |
| 79 | |
| 80 /* | |
| 81 * Structure representing a NFA state. | |
| 82 * A NFA state may have no outgoing edge, when it is a NFA_MATCH state. | |
| 83 */ | |
| 84 typedef struct nfa_state nfa_state_T; | |
| 85 struct nfa_state | |
| 86 { | |
| 87 int c; | |
| 88 nfa_state_T *out; | |
| 89 nfa_state_T *out1; | |
| 90 int id; | |
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91 int lastlist[2]; /* 0: normal, 1: recursive */ |
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92 int val; |
| 4444 | 93 }; |
| 94 | |
| 95 /* | |
| 96 * Structure used by the NFA matcher. | |
| 97 */ | |
| 98 typedef struct | |
| 99 { | |
| 6328 | 100 /* These three members implement regprog_T */ |
| 4444 | 101 regengine_T *engine; |
| 7 | 102 unsigned regflags; |
| 6328 | 103 unsigned re_engine; |
| 104 unsigned re_flags; /* second argument for vim_regcomp() */ | |
| 4444 | 105 |
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106 nfa_state_T *start; /* points into state[] */ |
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107 |
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108 int reganch; /* pattern starts with ^ */ |
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109 int regstart; /* char at start of pattern */ |
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110 char_u *match_text; /* plain text to match with */ |
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111 |
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112 int has_zend; /* pattern contains \ze */ |
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113 int has_backref; /* pattern contains \1 .. \9 */ |
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114 #ifdef FEAT_SYN_HL |
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115 int reghasz; |
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116 #endif |
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117 char_u *pattern; |
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118 int nsubexp; /* number of () */ |
| 4444 | 119 int nstate; |
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120 nfa_state_T state[1]; /* actually longer.. */ |
| 4444 | 121 } nfa_regprog_T; |
| 7 | 122 |
| 123 /* | |
| 124 * Structure to be used for single-line matching. | |
| 125 * Sub-match "no" starts at "startp[no]" and ends just before "endp[no]". | |
| 126 * When there is no match, the pointer is NULL. | |
| 127 */ | |
| 128 typedef struct | |
| 129 { | |
| 130 regprog_T *regprog; | |
| 131 char_u *startp[NSUBEXP]; | |
| 132 char_u *endp[NSUBEXP]; | |
| 133 int rm_ic; | |
| 134 } regmatch_T; | |
| 135 | |
| 136 /* | |
| 137 * Structure to be used for multi-line matching. | |
| 138 * Sub-match "no" starts in line "startpos[no].lnum" column "startpos[no].col" | |
| 139 * and ends in line "endpos[no].lnum" just before column "endpos[no].col". | |
| 140 * The line numbers are relative to the first line, thus startpos[0].lnum is | |
| 141 * always 0. | |
| 142 * When there is no match, the line number is -1. | |
| 143 */ | |
| 144 typedef struct | |
| 145 { | |
| 146 regprog_T *regprog; | |
| 147 lpos_T startpos[NSUBEXP]; | |
| 148 lpos_T endpos[NSUBEXP]; | |
| 149 int rmm_ic; | |
| 418 | 150 colnr_T rmm_maxcol; /* when not zero: maximum column */ |
| 7 | 151 } regmmatch_T; |
| 152 | |
| 153 /* | |
| 154 * Structure used to store external references: "\z\(\)" to "\z\1". | |
| 155 * Use a reference count to avoid the need to copy this around. When it goes | |
| 156 * from 1 to zero the matches need to be freed. | |
| 157 */ | |
| 158 typedef struct | |
| 159 { | |
| 160 short refcnt; | |
| 161 char_u *matches[NSUBEXP]; | |
| 162 } reg_extmatch_T; | |
| 163 | |
| 4444 | 164 struct regengine |
| 165 { | |
| 166 regprog_T *(*regcomp)(char_u*, int); | |
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167 void (*regfree)(regprog_T *); |
| 5838 | 168 int (*regexec_nl)(regmatch_T*, char_u*, colnr_T, int); |
| 4444 | 169 long (*regexec_multi)(regmmatch_T*, win_T*, buf_T*, linenr_T, colnr_T, proftime_T*); |
| 170 char_u *expr; | |
| 171 }; | |
| 172 | |
| 7 | 173 #endif /* _REGEXP_H */ |