Mercurial > sdl-ios-xcode

annotate src/SDL_hints.c @ 5192:6f6a9340fb93

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Added a hint system to allow configuration hints to be specified by the application.
author Sam Lantinga <slouken@libsdl.org>
date Sat, 05 Feb 2011 10:02:39 -0800
parents
children 01bced9a4cc1
rev   line source
5192
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
1 /*
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
2 SDL - Simple DirectMedia Layer
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
3 Copyright (C) 1997-2010 Sam Lantinga
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
4
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
5 This library is free software; you can redistribute it and/or
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
6 modify it under the terms of the GNU Lesser General Public
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
7 License as published by the Free Software Foundation; either
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
8 version 2.1 of the License, or (at your option) any later version.
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
9
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
10 This library is distributed in the hope that it will be useful,
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
13 Lesser General Public License for more details.
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
14
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
15 You should have received a copy of the GNU Lesser General Public
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
16 License along with this library; if not, write to the Free Software
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
18
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
19 Sam Lantinga
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
20 slouken@libsdl.org
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
21 */
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
22 #include "SDL_config.h"
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
23
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
24 #include "SDL_hints.h"
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
25
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
26
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
27 /* Assuming there aren't many hints set and they aren't being queried in
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
28 critical performance paths, we'll just use a linked list here.
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
29 */
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
30 typedef struct SDL_Hint {
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
31 char *name;
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
32 char *value;
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
33 SDL_HintPriority priority;
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
34 struct SDL_Hint *next;
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
35 } SDL_Hint;
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
36
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
37 static SDL_Hint *SDL_hints;
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
38
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
39
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
40 SDL_bool
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
41 SDL_SetHint(const char *name, const char *value, SDL_HintPriority priority)
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
42 {
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
43 const char *env;
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
44 SDL_Hint *prev, *hint;
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
45
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
46 if (!name || !value) {
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
47 return SDL_FALSE;
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
48 }
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
49
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
50 env = SDL_getenv(name);
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
51 if (env && priority < SDL_HINT_OVERRIDE) {
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
52 return SDL_FALSE;
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
53 }
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
54
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
55 prev = NULL;
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
56 for (hint = SDL_hints; hint; prev = hint, hint = hint->next) {
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
57 if (SDL_strcmp(name, hint->name) == 0) {
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
58 if (priority < hint->priority) {
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
59 return SDL_FALSE;
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
60 }
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
61 if (SDL_strcmp(hint->value, value) != 0) {
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
62 SDL_free(hint->value);
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
63 hint->value = SDL_strdup(value);
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
64 }
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
65 hint->priority = priority;
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
66 return SDL_TRUE;
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
67 }
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
68 }
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
69
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
70 /* Couldn't find the hint, add a new one */
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
71 hint = (SDL_Hint *)SDL_malloc(sizeof(*hint));
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
72 if (!hint) {
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
73 return SDL_FALSE;
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
74 }
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
75 hint->name = SDL_strdup(name);
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
76 hint->value = SDL_strdup(value);
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
77 hint->priority = priority;
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
78 hint->next = SDL_hints;
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
79 SDL_hints = hint;
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
80 return SDL_TRUE;
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
81 }
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
82
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
83 const char *
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
84 SDL_GetHint(const char *name)
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
85 {
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
86 const char *env;
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
87 SDL_Hint *hint;
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
88
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
89 env = SDL_getenv(name);
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
90 for (hint = SDL_hints; hint; hint = hint->next) {
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
91 if (SDL_strcmp(name, hint->name) == 0) {
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
92 if (!env || hint->priority == SDL_HINT_OVERRIDE) {
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
93 return hint->value;
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
94 }
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
95 break;
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
96 }
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
97 }
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
98 return env;
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
99 }
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
100
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
101 void SDL_ClearHints()
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
102 {
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
103 SDL_Hint *hint;
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
104
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
105 while (SDL_hints) {
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
106 hint = SDL_hints;
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
107 SDL_hints = hint->next;
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
108
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
109 SDL_free(hint->name);
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
110 SDL_free(hint->value);
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
111 SDL_free(hint);
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
112 }
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
113 }
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
114
6f6a9340fb93 Added a hint system to allow configuration hints to be specified by the application.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
115 /* vi: set ts=4 sw=4 expandtab: */