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1 /* vi:set ts=8 sts=4 sw=4:
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2 *
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3 * NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE
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4 *
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5 * This is NOT the original regular expression code as written by Henry
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6 * Spencer. This code has been modified specifically for use with Vim, and
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7 * should not be used apart from compiling Vim. If you want a good regular
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8 * expression library, get the original code.
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9 *
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10 * NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE
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11 */
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12
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13 #ifndef _REGEXP_H
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14 #define _REGEXP_H
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15
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16 /*
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17 * The number of sub-matches is limited to 10.
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18 * The first one (index 0) is the whole match, referenced with "\0".
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19 * The second one (index 1) is the first sub-match, referenced with "\1".
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20 * This goes up to the tenth (index 9), referenced with "\9".
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21 */
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22 #define NSUBEXP 10
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23
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24 /*
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25 * Structure returned by vim_regcomp() to pass on to vim_regexec().
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26 * These fields are only to be used in regexp.c!
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27 * See regep.c for an explanation.
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28 */
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29 typedef struct
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30 {
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31 int regstart;
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32 char_u reganch;
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33 char_u *regmust;
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34 int regmlen;
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35 unsigned regflags;
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36 char_u reghasz;
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37 char_u program[1]; /* actually longer.. */
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38 } regprog_T;
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39
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40 /*
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41 * Structure to be used for single-line matching.
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42 * Sub-match "no" starts at "startp[no]" and ends just before "endp[no]".
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43 * When there is no match, the pointer is NULL.
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44 */
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45 typedef struct
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46 {
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47 regprog_T *regprog;
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48 char_u *startp[NSUBEXP];
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49 char_u *endp[NSUBEXP];
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50 int rm_ic;
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51 } regmatch_T;
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52
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53 /*
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54 * Structure to be used for multi-line matching.
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55 * Sub-match "no" starts in line "startpos[no].lnum" column "startpos[no].col"
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56 * and ends in line "endpos[no].lnum" just before column "endpos[no].col".
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57 * The line numbers are relative to the first line, thus startpos[0].lnum is
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58 * always 0.
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59 * When there is no match, the line number is -1.
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60 */
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61 typedef struct
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62 {
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63 regprog_T *regprog;
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64 lpos_T startpos[NSUBEXP];
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65 lpos_T endpos[NSUBEXP];
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66 int rmm_ic;
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67 } regmmatch_T;
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68
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69 /*
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70 * Structure used to store external references: "\z\(\)" to "\z\1".
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71 * Use a reference count to avoid the need to copy this around. When it goes
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72 * from 1 to zero the matches need to be freed.
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73 */
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74 typedef struct
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75 {
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76 short refcnt;
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77 char_u *matches[NSUBEXP];
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78 } reg_extmatch_T;
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79
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80 #endif /* _REGEXP_H */
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