/* histlib.h -- internal definitions for the history library. */

/* Copyright (C) 1989-2009 Free Software Foundation, Inc.

   This file contains the GNU History Library (History), a set of

   routines for managing the text of previously typed lines.

   History 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 3 of the License, or

   (at your option) any later version.

   History 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 History.  If not, see <http://www.gnu.org/licenses/>.

*/

#if !defined (_HISTLIB_H_)

#define _HISTLIB_H_

#if defined (HAVE_STRING_H)

#  include <string.h>

#else

#  include <strings.h>

#endif /* !HAVE_STRING_H */

#if !defined (STREQ)

#define STREQ(a, b)	(((a)[0] == (b)[0]) && (strcmp ((a), (b)) == 0))

#define STREQN(a, b, n) (((n) == 0) ? (1) \

				    : ((a)[0] == (b)[0]) && (strncmp ((a), (b), (n)) == 0))

#endif

#ifndef savestring

#define savestring(x) strcpy (xmalloc (1 + strlen (x)), (x))

#endif

#ifndef whitespace

#define whitespace(c) (((c) == ' ') || ((c) == '\t'))

#endif

#ifndef _rl_digit_p

#define _rl_digit_p(c)  ((c) >= '0' && (c) <= '9')

#endif

#ifndef _rl_digit_value

#define _rl_digit_value(c) ((c) - '0')

#endif

#ifndef member

#  ifndef strchr

extern char *strchr ();

#  endif

#define member(c, s) ((c) ? ((char *)strchr ((s), (c)) != (char *)NULL) : 0)

#endif

#ifndef FREE

#  define FREE(x)	if (x) free (x)

#endif

/* Possible history errors passed to hist_error. */

#define EVENT_NOT_FOUND 0

#define BAD_WORD_SPEC	1

#define SUBST_FAILED	2

#define BAD_MODIFIER	3

#define NO_PREV_SUBST	4

/* Possible definitions for history starting point specification. */

#define ANCHORED_SEARCH 1

#define NON_ANCHORED_SEARCH 0

/* Possible definitions for what style of writing the history file we want. */

#define HISTORY_APPEND 0

#define HISTORY_OVERWRITE 1

/* Some variable definitions shared across history source files. */

extern int history_offset;

#endif /* !_HISTLIB_H_ */