| 1 | /* search.c - searching subroutines using dfa, kwset and regex for grep.
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| 2 | Copyright 1992, 1998, 2000, 2007, 2009-2021 Free Software Foundation, Inc.
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| 3 |
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| 4 | This program is free software; you can redistribute it and/or modify
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| 5 | it under the terms of the GNU General Public License as published by
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| 6 | the Free Software Foundation; either version 3, or (at your option)
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| 7 | any later version.
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| 8 |
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| 9 | This program is distributed in the hope that it will be useful,
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 12 | GNU General Public License for more details.
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| 13 |
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| 14 | You should have received a copy of the GNU General Public License
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| 15 | along with this program; if not, write to the Free Software
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| 16 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
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| 17 | 02110-1301, USA. */
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| 18 |
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| 19 | #ifndef GREP_SEARCH_H
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| 20 | #define GREP_SEARCH_H 1
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| 21 |
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| 22 | #include <config.h>
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| 23 |
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| 24 | #include <sys/types.h>
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| 25 | #include <stdint.h>
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| 26 | #include <wchar.h>
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| 27 | #include <wctype.h>
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| 28 | #include <regex.h>
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| 29 |
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| 30 | #include "system.h"
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| 31 | #include "grep.h"
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| 32 | #include "dfa.h"
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| 33 | #include "kwset.h"
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| 34 | #include "xalloc.h"
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| 35 | #include "localeinfo.h"
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| 36 |
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| 37 | _GL_INLINE_HEADER_BEGIN
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| 38 | #ifndef SEARCH_INLINE
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| 39 | # define SEARCH_INLINE _GL_INLINE
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| 40 | #endif
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| 41 |
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| 42 | /* This must be a signed type. Each value is the difference in the size
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| 43 | of a character (in bytes) induced by converting to lower case.
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| 44 | The vast majority of values are 0, but a few are 1 or -1, so
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| 45 | technically, two bits may be sufficient. */
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| 46 | typedef signed char mb_len_map_t;
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| 47 |
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| 48 | /* searchutils.c */
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| 49 | extern void wordinit (void);
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| 50 | extern kwset_t kwsinit (bool);
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| 51 | extern size_t wordchars_size (char const *, char const *) _GL_ATTRIBUTE_PURE;
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| 52 | extern size_t wordchar_next (char const *, char const *) _GL_ATTRIBUTE_PURE;
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| 53 | extern size_t wordchar_prev (char const *, char const *, char const *)
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| 54 | _GL_ATTRIBUTE_PURE;
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| 55 | extern ptrdiff_t mb_goback (char const **, size_t *, char const *,
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| 56 | char const *);
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| 57 |
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| 58 | /* dfasearch.c */
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| 59 | extern void *GEAcompile (char *, size_t, reg_syntax_t, bool);
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| 60 | extern size_t EGexecute (void *, char const *, size_t, size_t *, char const *);
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| 61 |
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| 62 | /* kwsearch.c */
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| 63 | extern void *Fcompile (char *, size_t, reg_syntax_t, bool);
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| 64 | extern size_t Fexecute (void *, char const *, size_t, size_t *, char const *);
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| 65 |
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| 66 | /* pcresearch.c */
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| 67 | extern void *Pcompile (char *, size_t, reg_syntax_t, bool);
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| 68 | extern size_t Pexecute (void *, char const *, size_t, size_t *, char const *);
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| 69 |
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| 70 | /* grep.c */
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| 71 | extern struct localeinfo localeinfo;
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| 72 | extern void fgrep_to_grep_pattern (char **, size_t *);
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| 73 |
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| 74 | /* Return the number of bytes in the character at the start of S, which
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| 75 | is of size N. N must be positive. MBS is the conversion state.
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| 76 | This acts like mbrlen, except it returns 1 when mbrlen would return 0,
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| 77 | and it is typically faster because of the cache. */
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| 78 | SEARCH_INLINE size_t
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| 79 | mb_clen (char const *s, size_t n, mbstate_t *mbs)
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| 80 | {
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| 81 | size_t len = localeinfo.sbclen[to_uchar (*s)];
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| 82 | return len == (size_t) -2 ? mbrlen (s, n, mbs) : len;
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| 83 | }
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| 84 |
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| 85 | extern char const *input_filename (void);
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| 86 |
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| 87 | _GL_INLINE_HEADER_END
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| 88 |
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| 89 | #endif /* GREP_SEARCH_H */
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