Mercurial > vim
annotate src/regexp.h @ 4571:b2a8e3a66f8c v7.3.1033
updated for version 7.3.1033
Problem: "\1" .. "\9" are not supported in the new regexp engine.
Solution: Implement them. Add a few more tests.
| author | Bram Moolenaar <bram@vim.org> |
|---|---|
| date | Tue, 28 May 2013 22:03:20 +0200 |
| parents | 4d81fdda8f35 |
| children | 321cfbef9431 |
| 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 | |
| 30 typedef struct regengine regengine_T; | |
| 31 | |
| 32 /* | |
| 7 | 33 * Structure returned by vim_regcomp() to pass on to vim_regexec(). |
| 4444 | 34 * This is the general structure. For the actual matcher, two specific |
| 35 * structures are used. See code below. | |
| 36 */ | |
| 37 typedef struct regprog | |
| 38 { | |
| 39 regengine_T *engine; | |
| 40 unsigned regflags; | |
| 41 } regprog_T; | |
| 42 | |
| 43 /* | |
| 44 * Structure used by the back track matcher. | |
| 7 | 45 * These fields are only to be used in regexp.c! |
| 4444 | 46 * See regexp.c for an explanation. |
| 7 | 47 */ |
| 48 typedef struct | |
| 49 { | |
| 4444 | 50 /* These two members implement regprog_T */ |
| 51 regengine_T *engine; | |
| 52 unsigned regflags; | |
| 53 | |
| 7 | 54 int regstart; |
| 55 char_u reganch; | |
| 56 char_u *regmust; | |
| 57 int regmlen; | |
| 4444 | 58 char_u reghasz; |
| 59 char_u program[1]; /* actually longer.. */ | |
| 60 } bt_regprog_T; | |
| 61 | |
| 62 /* | |
| 63 * Structure representing a NFA state. | |
| 64 * A NFA state may have no outgoing edge, when it is a NFA_MATCH state. | |
| 65 */ | |
| 66 typedef struct nfa_state nfa_state_T; | |
| 67 struct nfa_state | |
| 68 { | |
| 69 int c; | |
| 70 nfa_state_T *out; | |
| 71 nfa_state_T *out1; | |
| 72 int id; | |
| 73 int lastlist; | |
| 74 int negated; | |
| 75 }; | |
| 76 | |
| 77 /* | |
| 78 * Structure used by the NFA matcher. | |
| 79 */ | |
| 80 typedef struct | |
| 81 { | |
| 82 /* These two members implement regprog_T */ | |
| 83 regengine_T *engine; | |
| 7 | 84 unsigned regflags; |
| 4444 | 85 |
| 86 regprog_T regprog; | |
| 87 nfa_state_T *start; | |
|
4553
7b835b2969af
updated for version 7.3.1024
Bram Moolenaar <bram@vim.org>
parents:
4539
diff
changeset
|
88 int has_zend; /* pattern contains \ze */ |
|
4561
4d81fdda8f35
updated for version 7.3.1028
Bram Moolenaar <bram@vim.org>
parents:
4553
diff
changeset
|
89 int nsubexp; /* number of () */ |
| 4444 | 90 int nstate; |
| 91 nfa_state_T state[0]; /* actually longer.. */ | |
| 92 } nfa_regprog_T; | |
| 7 | 93 |
| 94 /* | |
| 95 * Structure to be used for single-line matching. | |
| 96 * Sub-match "no" starts at "startp[no]" and ends just before "endp[no]". | |
| 97 * When there is no match, the pointer is NULL. | |
| 98 */ | |
| 99 typedef struct | |
| 100 { | |
| 101 regprog_T *regprog; | |
| 102 char_u *startp[NSUBEXP]; | |
| 103 char_u *endp[NSUBEXP]; | |
| 104 int rm_ic; | |
| 105 } regmatch_T; | |
| 106 | |
| 107 /* | |
| 108 * Structure to be used for multi-line matching. | |
| 109 * Sub-match "no" starts in line "startpos[no].lnum" column "startpos[no].col" | |
| 110 * and ends in line "endpos[no].lnum" just before column "endpos[no].col". | |
| 111 * The line numbers are relative to the first line, thus startpos[0].lnum is | |
| 112 * always 0. | |
| 113 * When there is no match, the line number is -1. | |
| 114 */ | |
| 115 typedef struct | |
| 116 { | |
| 117 regprog_T *regprog; | |
| 118 lpos_T startpos[NSUBEXP]; | |
| 119 lpos_T endpos[NSUBEXP]; | |
| 120 int rmm_ic; | |
| 418 | 121 colnr_T rmm_maxcol; /* when not zero: maximum column */ |
| 7 | 122 } regmmatch_T; |
| 123 | |
| 124 /* | |
| 125 * Structure used to store external references: "\z\(\)" to "\z\1". | |
| 126 * Use a reference count to avoid the need to copy this around. When it goes | |
| 127 * from 1 to zero the matches need to be freed. | |
| 128 */ | |
| 129 typedef struct | |
| 130 { | |
| 131 short refcnt; | |
| 132 char_u *matches[NSUBEXP]; | |
| 133 } reg_extmatch_T; | |
| 134 | |
| 4444 | 135 struct regengine |
| 136 { | |
| 137 regprog_T *(*regcomp)(char_u*, int); | |
| 138 int (*regexec)(regmatch_T*, char_u*, colnr_T); | |
| 139 #if defined(FEAT_MODIFY_FNAME) || defined(FEAT_EVAL) \ | |
| 140 || defined(FIND_REPLACE_DIALOG) || defined(PROTO) | |
| 141 int (*regexec_nl)(regmatch_T*, char_u*, colnr_T); | |
| 142 #endif | |
| 143 long (*regexec_multi)(regmmatch_T*, win_T*, buf_T*, linenr_T, colnr_T, proftime_T*); | |
| 144 #ifdef DEBUG | |
| 145 char_u *expr; | |
| 146 #endif | |
| 147 }; | |
| 148 | |
| 7 | 149 #endif /* _REGEXP_H */ |