1 files changed, 76 insertions, 0 deletions
diff --git a/OpenAL32/alExtension.cpp b/OpenAL32/alExtension.cpp
new file mode 100644
index 00000000..bcc21f0f
--- /dev/null
+++ b/OpenAL32/alExtension.cpp
@@ -0,0 +1,76 @@
+/**
+ * OpenAL cross platform audio library
+ * Copyright (C) 1999-2007 by authors.
+ * This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Library General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ *  Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ *  License along with this library; if not, write to the
+ *  Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ * Or go to http://www.gnu.org/copyleft/lgpl.html
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+
+#include "alError.h"
+#include "alMain.h"
+#include "alFilter.h"
+#include "alEffect.h"
+#include "alAuxEffectSlot.h"
+#include "alSource.h"
+#include "alBuffer.h"
+#include "AL/al.h"
+#include "AL/alc.h"
+
+
+AL_API ALboolean AL_APIENTRY alIsExtensionPresent(const ALchar *extName)
+{
+    ContextRef context{GetContextRef()};
+    if(UNLIKELY(!context)) return AL_FALSE;
+
+    if(!extName)
+        SETERR_RETURN(context.get(), AL_INVALID_VALUE, AL_FALSE, "NULL pointer");
+
+    size_t len{strlen(extName)};
+    const char *ptr{context->ExtensionList};
+    while(ptr && *ptr)
+    {
+        if(strncasecmp(ptr, extName, len) == 0 &&
+           (ptr[len] == '\0' || isspace(ptr[len])))
+            return AL_TRUE;
+
+        if((ptr=strchr(ptr, ' ')) != NULL)
+        {
+            do {
+                ++ptr;
+            } while(isspace(*ptr));
+        }
+    }
+
+    return AL_FALSE;
+}
+
+
+AL_API ALvoid* AL_APIENTRY alGetProcAddress(const ALchar *funcName)
+{
+    if(!funcName) return nullptr;
+    return alcGetProcAddress(nullptr, funcName);
+}
+
+AL_API ALenum AL_APIENTRY alGetEnumValue(const ALchar *enumName)
+{
+    if(!enumName) return (ALenum)0;
+    return alcGetEnumValue(nullptr, enumName);
+}