source: set.h @ 95e17fc

Last change on this file since 95e17fc was 6f10697, checked in by dequis <dx@…>, at 2015-01-16T19:50:23Z

Fix incorrect Free Software Foundation address

  • Property mode set to 100644
File size: 4.7 KB
Line 
1  /********************************************************************\
2  * BitlBee -- An IRC to other IM-networks gateway                     *
3  *                                                                    *
4  * Copyright 2002-2006 Wilmer van der Gaast and others                *
5  \********************************************************************/
6
7/* Some stuff to register, handle and save user preferences             */
8
9/*
10  This program is free software; you can redistribute it and/or modify
11  it under the terms of the GNU General Public License as published by
12  the Free Software Foundation; either version 2 of the License, or
13  (at your option) any later version.
14
15  This program is distributed in the hope that it will be useful,
16  but WITHOUT ANY WARRANTY; without even the implied warranty of
17  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  GNU General Public License for more details.
19
20  You should have received a copy of the GNU General Public License with
21  the Debian GNU/Linux distribution in /usr/share/common-licenses/GPL;
22  if not, write to the Free Software Foundation, Inc., 51 Franklin St.,
23  Fifth Floor, Boston, MA  02110-1301  USA
24*/
25
26#ifndef __SET_H__
27#define __SET_H__
28
29struct set;
30
31/* This used to be specific to irc_t structures, but it's more generic now
32   (so it can also be used for account_t structs). It's pretty simple, but
33   so far pretty useful.
34   
35   In short, it just keeps a linked list of settings/variables and it also
36   remembers a default value for every setting. And to prevent the user
37   from setting invalid values, you can write an evaluator function for
38   every setting, which can check a new value and block it by returning
39   NULL, or replace it by returning a new value. See struct set.eval. */
40
41typedef char *(*set_eval) ( struct set *set, char *value );
42
43extern char *SET_INVALID;
44
45typedef enum
46{
47        SET_NOSAVE = 0x0001,   /* Don't save this setting (i.e. stored elsewhere). */
48        SET_NULL_OK = 0x0100,  /* set->value == NULL is allowed. */
49        SET_HIDDEN = 0x0200,   /* Don't show up in setting lists. Mostly for internal storage. */
50        SET_PASSWORD = 0x0400, /* Value shows up in settings list as "********". */
51        SET_HIDDEN_DEFAULT = 0x0800, /* Hide unless changed from default. */
52} set_flags_t;
53
54typedef struct set
55{
56        void *data;     /* Here you can save a pointer to the
57                           object this settings belongs to. */
58       
59        char *key;
60        char *old_key;  /* Previously known as; for smooth upgrades. */
61        char *value;
62        char *def;      /* Default value. If the set_setstr() function
63                           notices a new value is exactly the same as
64                           the default, value gets set to NULL. So when
65                           you read a setting, don't forget about this!
66                           In fact, you should only read values using
67                           set_getstr/int(). */
68       
69        set_flags_t flags; /* Mostly defined per user. */
70       
71        /* Eval: Returns SET_INVALID if the value is incorrect, exactly
72           the passed value variable, or a corrected value. In case of
73           the latter, set_setstr() will free() the returned string! */
74        set_eval eval;
75        void *eval_data;
76        struct set *next;
77} set_t;
78
79#define set_value( set ) ((set)->value) ? ((set)->value) : ((set)->def)
80
81/* Should be pretty clear. */
82set_t *set_add( set_t **head, const char *key, const char *def, set_eval eval, void *data );
83
84/* Returns the raw set_t. Might be useful sometimes. */
85set_t *set_find( set_t **head, const char *key );
86
87/* Returns a pointer to the string value of this setting. Don't modify the
88   returned string, and don't free() it! */
89G_MODULE_EXPORT char *set_getstr( set_t **head, const char *key );
90
91/* Get an integer. In previous versions set_getint() was also used to read
92   boolean values, but this SHOULD be done with set_getbool() now! */
93G_MODULE_EXPORT int set_getint( set_t **head, const char *key );
94G_MODULE_EXPORT int set_getbool( set_t **head, const char *key );
95
96/* set_setstr() strdup()s the given value, so after using this function
97   you can free() it, if you want. */
98int set_setstr( set_t **head, const char *key, char *value );
99int set_setint( set_t **head, const char *key, int value );
100void set_del( set_t **head, const char *key );
101int set_reset( set_t **head, const char *key );
102
103/* returns true if a setting shall be shown to the user */
104int set_isvisible( set_t *set );
105
106/* Two very useful generic evaluators. */
107char *set_eval_int( set_t *set, char *value );
108char *set_eval_bool( set_t *set, char *value );
109
110/* Another more complicated one. */
111char *set_eval_list( set_t *set, char *value );
112
113/* Some not very generic evaluators that really shouldn't be here... */
114char *set_eval_to_char( set_t *set, char *value );
115char *set_eval_oauth( set_t *set, char *value );
116
117#endif /* __SET_H__ */
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