forked from aniani/vim
57a285b105
Problem: New regexp: End of matching pattern not set correctly. (Cesar
Romani)
Solution: Quit the loop after finding the match. Store nfa_has_zend in the
program.
150 lines
3.8 KiB
C
150 lines
3.8 KiB
C
/* vi:set ts=8 sts=4 sw=4:
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*
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* NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE
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*
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* This is NOT the original regular expression code as written by Henry
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* Spencer. This code has been modified specifically for use with Vim, and
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* should not be used apart from compiling Vim. If you want a good regular
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* expression library, get the original code.
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*
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* NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE
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*/
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#ifndef _REGEXP_H
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#define _REGEXP_H
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/*
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* The number of sub-matches is limited to 10.
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* The first one (index 0) is the whole match, referenced with "\0".
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* The second one (index 1) is the first sub-match, referenced with "\1".
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* This goes up to the tenth (index 9), referenced with "\9".
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*/
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#define NSUBEXP 10
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/*
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* In the NFA engine: how many braces are allowed.
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* TODO(RE): Use dynamic memory allocation instead of static, like here
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*/
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#define NFA_MAX_BRACES 20
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typedef struct regengine regengine_T;
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/*
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* Structure returned by vim_regcomp() to pass on to vim_regexec().
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* This is the general structure. For the actual matcher, two specific
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* structures are used. See code below.
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*/
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typedef struct regprog
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{
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regengine_T *engine;
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unsigned regflags;
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} regprog_T;
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/*
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* Structure used by the back track matcher.
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* These fields are only to be used in regexp.c!
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* See regexp.c for an explanation.
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*/
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typedef struct
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{
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/* These two members implement regprog_T */
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regengine_T *engine;
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unsigned regflags;
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int regstart;
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char_u reganch;
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char_u *regmust;
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int regmlen;
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char_u reghasz;
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char_u program[1]; /* actually longer.. */
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} bt_regprog_T;
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/*
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* Structure representing a NFA state.
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* A NFA state may have no outgoing edge, when it is a NFA_MATCH state.
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*/
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typedef struct nfa_state nfa_state_T;
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struct nfa_state
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{
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int c;
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nfa_state_T *out;
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nfa_state_T *out1;
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int id;
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int lastlist;
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int visits;
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int negated;
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};
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/*
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* Structure used by the NFA matcher.
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*/
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typedef struct
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{
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/* These two members implement regprog_T */
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regengine_T *engine;
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unsigned regflags;
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regprog_T regprog;
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nfa_state_T *start;
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int has_zend; /* pattern contains \ze */
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int nstate;
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nfa_state_T state[0]; /* actually longer.. */
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} nfa_regprog_T;
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/*
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* Structure to be used for single-line matching.
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* Sub-match "no" starts at "startp[no]" and ends just before "endp[no]".
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* When there is no match, the pointer is NULL.
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*/
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typedef struct
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{
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regprog_T *regprog;
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char_u *startp[NSUBEXP];
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char_u *endp[NSUBEXP];
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int rm_ic;
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} regmatch_T;
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/*
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* Structure to be used for multi-line matching.
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* Sub-match "no" starts in line "startpos[no].lnum" column "startpos[no].col"
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* and ends in line "endpos[no].lnum" just before column "endpos[no].col".
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* The line numbers are relative to the first line, thus startpos[0].lnum is
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* always 0.
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* When there is no match, the line number is -1.
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*/
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typedef struct
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{
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regprog_T *regprog;
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lpos_T startpos[NSUBEXP];
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lpos_T endpos[NSUBEXP];
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int rmm_ic;
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colnr_T rmm_maxcol; /* when not zero: maximum column */
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} regmmatch_T;
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/*
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* Structure used to store external references: "\z\(\)" to "\z\1".
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* Use a reference count to avoid the need to copy this around. When it goes
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* from 1 to zero the matches need to be freed.
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*/
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typedef struct
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{
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short refcnt;
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char_u *matches[NSUBEXP];
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} reg_extmatch_T;
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struct regengine
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{
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regprog_T *(*regcomp)(char_u*, int);
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int (*regexec)(regmatch_T*, char_u*, colnr_T);
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#if defined(FEAT_MODIFY_FNAME) || defined(FEAT_EVAL) \
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|| defined(FIND_REPLACE_DIALOG) || defined(PROTO)
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int (*regexec_nl)(regmatch_T*, char_u*, colnr_T);
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#endif
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long (*regexec_multi)(regmmatch_T*, win_T*, buf_T*, linenr_T, colnr_T, proftime_T*);
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#ifdef DEBUG
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char_u *expr;
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#endif
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};
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#endif /* _REGEXP_H */
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