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GitHub Repository: att/ast
 Path: blob/master/src/cmd/ie/history.h
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/***********************************************************************

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*                                                                      *

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*               This software is part of the ast package               *

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*          Copyright (c) 1984-2011 AT&T Intellectual Property          *

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*                      and is licensed under the                       *

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*                 Eclipse Public License, Version 1.0                  *

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*                    by AT&T Intellectual Property                     *

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*                                                                      *

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*                A copy of the License is available at                 *

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*          http://www.eclipse.org/org/documents/epl-v10.html           *

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*         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *

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*                                                                      *

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*              Information and Software Systems Research               *

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*                            AT&T Research                             *

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*                           Florham Park NJ                            *

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*                                                                      *

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*                  David Korn <[email protected]>                   *

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*                             Pat Sullivan                             *

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*                                                                      *

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***********************************************************************/

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/*

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 *	UNIX shell

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 *	Header File for history mechanism

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 *	written by David Korn

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 *

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 */

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#ifndef IOBSIZE

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#   define IOBSIZE	1024

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#endif

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#define FC_CHAR		'!'

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#define HIS_DFLT	128		/* default size of history list */

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#define HISMAX		(sizeof(int)*IOBSIZE)

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#define HISBIG		(0100000-1024)	/* 1K less than maximum short */

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#define HISLINE		16		/* estimate of average sized history line */

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#define MAXLINE		258		/* longest history line permitted */

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#define H_UNDO		0201		/* invalidate previous command */

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#define H_CMDNO		0202		/* next 3 bytes give command number */

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#define H_VERSION	1		/* history file format version no. */

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struct history

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{

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	struct fileblk	*fixfp;		/* file descriptor for history file */

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	int 		fixfd;		/* file number for history file */

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	char		*fixname;	/* name of history file */

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	off_t		fixcnt;		/* offset into history file */

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	int		fixind;		/* current command number index */

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	int		fixmax;		/* number of accessible history lines */

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	int		fixflush;	/* set if flushed outside of hflush() */

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	off_t		fixcmds[1];	/* byte offset for recent commands */

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};

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typedef struct

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{

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	int his_command;

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	int his_line;

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} histloc;

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extern struct history	*hist_ptr;

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#ifndef KSHELL

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    extern void	p_flush();

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    extern void	p_setout();

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    extern void	p_char();

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    extern void	p_str();

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#   ifdef __STDC__

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#	define nam_strval(s)	getenv(#s)

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#   else

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#	define nam_strval(s)	getenv("s")

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#   endif /* __STDC__ */

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#   define NIL		((char*)0)

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#   define sh_fail	ed_failed

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#   define sh_copy	ed_movstr

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#ifdef PROTO

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	extern char	*ed_movstr(const char*, char*);

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#else

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	extern char	*ed_movstr();

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#endif /* PROTO */

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#endif	/* KSHELL */

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/* the following are readonly */

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extern const char	hist_fname[];

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extern const char	e_history[];

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/* these are the history interface routines */

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#ifdef PROTO

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    extern int		hist_open(void);

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    extern void 	hist_cancel(void);

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    extern void 	hist_close(void);

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    extern int		hist_copy(char*,int,int);

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    extern void 	hist_eof(void);

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    extern histloc	hist_find(char*,int,int,int);

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    extern void 	hist_flush(void);

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    extern void 	hist_list(off_t,int,char*);

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    extern int		hist_match(off_t,char*,int);

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    extern off_t	hist_position(int);

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    extern void 	hist_subst(const char*,int,char*);

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    extern char 	*hist_word(char*,int);

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#   ifdef ESH

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	extern histloc	hist_locate(int,int,int);

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#   endif	/* ESH */

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#else

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    extern int		hist_open();

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    extern void 	hist_cancel();

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    extern void 	hist_close();

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    extern int		hist_copy();

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    extern void 	hist_eof();

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    extern histloc	hist_find();

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    extern void 	hist_flush();

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    extern void 	hist_list();

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    extern int		hist_match();

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    extern off_t	hist_position();

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    extern void 	hist_subst();

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    extern char 	*hist_word();

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#   ifdef ESH

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	extern histloc	hist_locate();

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#   endif	/* ESH */

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#endif /* PROTO */

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