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/* alias.h -- structure definitions. */
/* Copyright (C) 1987-2009 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
Bash 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.
Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>.
*/
#if !defined (_ALIAS_H_)
#define _ALIAS_H_
#include "stdc.h"
#include "hashlib.h"
typedef struct alias {
char *name;
char *value;
char flags;
} alias_t;
/* Values for `flags' member of struct alias. */
#define AL_EXPANDNEXT 0x1
#define AL_BEINGEXPANDED 0x2
/* The list of known aliases. */
extern HASH_TABLE *aliases;
extern void initialize_aliases __P((void));
/* Scan the list of aliases looking for one with NAME. Return NULL
if the alias doesn't exist, else a pointer to the alias. */
extern alias_t *find_alias __P((char *));
/* Return the value of the alias for NAME, or NULL if there is none. */
extern char *get_alias_value __P((char *));
/* Make a new alias from NAME and VALUE. If NAME can be found,
then replace its value. */
extern void add_alias __P((char *, char *));
/* Remove the alias with name NAME from the alias list. Returns
the index of the removed alias, or -1 if the alias didn't exist. */
extern int remove_alias __P((char *));
/* Remove all aliases. */
extern void delete_all_aliases __P((void));
/* Return an array of all defined aliases. */
extern alias_t **all_aliases __P((void));
/* Expand a single word for aliases. */
extern char *alias_expand_word __P((char *));
/* Return a new line, with any aliases expanded. */
extern char *alias_expand __P((char *));
#endif /* _ALIAS_H_ */
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