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+/* Search for patterns in strings or files.
+ Copyright (C) 2005 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2, or (at your option)
+ any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software Foundation,
+ Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+#ifndef _LIBGREP_H
+#define _LIBGREP_H
+
+#include <stdbool.h>
+#include <stddef.h>
+
+/* A pattern matcher. */
+typedef struct {
+
+ /* Compile a pattern and return the compiled pattern. */
+ void * (*compile) (const char *pattern, size_t pattern_size,
+ bool match_icase, bool match_words, bool match_lines,
+ char eolbyte);
+
+ /* Execute a search. */
+ size_t (*execute) (const void *compiled_pattern,
+ const char *buf, size_t buf_size,
+ size_t *match_size, bool exact);
+
+ /* Free a compiled pattern. */
+ void (*free) (void *compiled_pattern);
+
+} matcher_t;
+
+/* The built-in pattern matchers. */
+extern matcher_t matcher_grep; /* POSIX Basic Regular Expressions */
+extern matcher_t matcher_egrep; /* POSIX Extended Regular Expressions */
+extern matcher_t matcher_fgrep; /* Fixed String search */
+extern matcher_t matcher_awk; /* AWK Regular Expressions */
+
+#endif /* _LIBGREP_H */