mirror of https://github.com/PCSX2/pcsx2.git
123 lines
3.1 KiB
C
123 lines
3.1 KiB
C
/*
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SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2011 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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Sam Lantinga
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slouken@libsdl.org
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*/
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#include "SDL_config.h"
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#include "SDL_hints.h"
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/* Assuming there aren't many hints set and they aren't being queried in
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critical performance paths, we'll just use a linked list here.
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*/
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typedef struct SDL_Hint {
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char *name;
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char *value;
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SDL_HintPriority priority;
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struct SDL_Hint *next;
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} SDL_Hint;
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static SDL_Hint *SDL_hints;
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SDL_bool
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SDL_SetHintWithPriority(const char *name, const char *value,
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SDL_HintPriority priority)
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{
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const char *env;
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SDL_Hint *prev, *hint;
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if (!name || !value) {
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return SDL_FALSE;
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}
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env = SDL_getenv(name);
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if (env && priority < SDL_HINT_OVERRIDE) {
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return SDL_FALSE;
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}
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prev = NULL;
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for (hint = SDL_hints; hint; prev = hint, hint = hint->next) {
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if (SDL_strcmp(name, hint->name) == 0) {
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if (priority < hint->priority) {
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return SDL_FALSE;
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}
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if (SDL_strcmp(hint->value, value) != 0) {
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SDL_free(hint->value);
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hint->value = SDL_strdup(value);
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}
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hint->priority = priority;
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return SDL_TRUE;
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}
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}
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/* Couldn't find the hint, add a new one */
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hint = (SDL_Hint *)SDL_malloc(sizeof(*hint));
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if (!hint) {
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return SDL_FALSE;
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}
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hint->name = SDL_strdup(name);
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hint->value = SDL_strdup(value);
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hint->priority = priority;
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hint->next = SDL_hints;
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SDL_hints = hint;
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return SDL_TRUE;
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}
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SDL_bool
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SDL_SetHint(const char *name, const char *value)
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{
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return SDL_SetHintWithPriority(name, value, SDL_HINT_NORMAL);
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}
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const char *
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SDL_GetHint(const char *name)
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{
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const char *env;
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SDL_Hint *hint;
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env = SDL_getenv(name);
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for (hint = SDL_hints; hint; hint = hint->next) {
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if (SDL_strcmp(name, hint->name) == 0) {
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if (!env || hint->priority == SDL_HINT_OVERRIDE) {
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return hint->value;
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}
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break;
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}
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}
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return env;
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}
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void SDL_ClearHints(void)
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{
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SDL_Hint *hint;
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while (SDL_hints) {
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hint = SDL_hints;
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SDL_hints = hint->next;
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SDL_free(hint->name);
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SDL_free(hint->value);
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SDL_free(hint);
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}
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}
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/* vi: set ts=4 sw=4 expandtab: */
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