1 /* alias.h -- structure definitions. */
3 /* Copyright (C) 1987,1991 Free Software Foundation, Inc.
5 This file is part of GNU Bash, the Bourne Again SHell.
7 Bash is free software; you can redistribute it and/or modify it
8 under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 1, or (at your option)
12 Bash is distributed in the hope that it will be useful, but WITHOUT
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
15 License for more details.
17 You should have received a copy of the GNU General Public License
18 along with Bash; see the file COPYING. If not, write to the Free
19 Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
21 #if !defined (_ALIAS_)
26 extern char *xmalloc ();
28 #if !defined (whitespace)
29 # define whitespace(c) (((c) == ' ') || ((c) == '\t'))
30 #endif /* !whitespace */
32 #if !defined (savestring)
33 # define savestring(x) (char *)strcpy (xmalloc (1 + strlen (x)), (x))
34 #endif /* !savestring */
37 # if defined (__STDC__)
38 # define NULL ((void *) 0)
41 # endif /* !__STDC__ */
49 /* The list of known aliases. */
50 extern HASH_TABLE *aliases;
52 extern void initialize_aliases ();
54 /* Scan the list of aliases looking for one with NAME. Return NULL
55 if the alias doesn't exist, else a pointer to the assoc. */
56 extern ASSOC *find_alias ();
58 /* Return the value of the alias for NAME, or NULL if there is none. */
59 extern char *get_alias_value ();
61 /* Make a new alias from NAME and VALUE. If NAME can be found,
62 then replace its value. */
63 extern void add_alias ();
65 /* Remove the alias with name NAME from the alias list. Returns
66 the index of the removed alias, or -1 if the alias didn't exist. */
67 extern int remove_alias ();
69 /* Return a new line, with any aliases expanded. */
70 extern char *alias_expand ();
72 /* Return an array of all defined aliases. */
73 extern ASSOC **all_aliases ();