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1#ifndef KWSET_H
2#define KWSET_H
3
4/* This file has been copied from commit e7ac713d^ in the GNU grep git
5 * repository. A few small changes have been made to adapt the code to
6 * Git.
7 */
8
9/* kwset.h - header declaring the keyword set library.
10 Copyright (C) 1989, 1998, 2005 Free Software Foundation, Inc.
11
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 2, or (at your option)
15 any later version.
16
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
21
22 You should have received a copy of the GNU General Public License
23 along with this program; if not, see <https://www.gnu.org/licenses/>. */
24
25/* Written August 1989 by Mike Haertel.
26 The author may be reached (Email) at the address mike@ai.mit.edu,
27 or (US mail) as Mike Haertel c/o Free Software Foundation. */
28
29extern const unsigned char tolower_trans_tbl[256];
30
31struct kwsmatch
32{
33 int index; /* Index number of matching keyword. */
34 size_t offset[1]; /* Offset of each submatch. */
35 size_t size[1]; /* Length of each submatch. */
36};
37
38struct kwset_t;
39typedef struct kwset_t* kwset_t;
40
41/* Return an opaque pointer to a newly allocated keyword set, or NULL
42 if enough memory cannot be obtained. The argument if non-NULL
43 specifies a table of character translations to be applied to all
44 pattern and search text. */
45kwset_t kwsalloc(unsigned char const *);
46
47/* Incrementally extend the keyword set to include the given string.
48 Return NULL for success, or an error message. Remember an index
49 number for each keyword included in the set. */
50const char *kwsincr(kwset_t, char const *, size_t);
51
52/* When the keyword set has been completely built, prepare it for
53 use. Return NULL for success, or an error message. */
54const char *kwsprep(kwset_t);
55
56/* Search through the given buffer for a member of the keyword set.
57 Return a pointer to the leftmost longest match found, or NULL if
58 no match is found. If foundlen is non-NULL, store the length of
59 the matching substring in the integer it points to. Similarly,
60 if foundindex is non-NULL, store the index of the particular
61 keyword found therein. */
62size_t kwsexec(kwset_t, char const *, size_t, struct kwsmatch *);
63
64/* Deallocate the given keyword set and all its associated storage. */
65void kwsfree(kwset_t);
66
67#endif /* KWSET_H */