OpenAL32/alExtension.c

   1 /**
   2  * OpenAL cross platform audio library
   3  * Copyright (C) 1999-2007 by authors.
   4  * This library is free software; you can redistribute it and/or
   5  *  modify it under the terms of the GNU Library General Public
   6  *  License as published by the Free Software Foundation; either
   7  *  version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  *  Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public
  15  *  License along with this library; if not, write to the
  16  *  Free Software Foundation, Inc.,
  17  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  * Or go to http://www.gnu.org/copyleft/lgpl.html
  19  */
  20
  21 #include "config.h"
  22
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <ctype.h>
  26
  27 #include "alError.h"
  28 #include "alMain.h"
  29 #include "alFilter.h"
  30 #include "alEffect.h"
  31 #include "alAuxEffectSlot.h"
  32 #include "alSource.h"
  33 #include "alBuffer.h"
  34 #include "AL/al.h"
  35 #include "AL/alc.h"
  36
  37
  38 AL_API ALboolean AL_APIENTRY alIsExtensionPresent(const ALchar *extName)
  39 {
  40     ALboolean ret = AL_FALSE;
  41     ALCcontext *context;
  42     const char *ptr;
  43     size_t len;
  44
  45     context = GetContextRef();
  46     if(!context) return AL_FALSE;
  47
  48     if(!extName)
  49         SETERR_GOTO(context, AL_INVALID_VALUE, done, "NULL pointer");
  50
  51     len = strlen(extName);
  52     ptr = context->ExtensionList;
  53     while(ptr && *ptr)
  54     {
  55         if(strncasecmp(ptr, extName, len) == 0 &&
  56            (ptr[len] == '\0' || isspace(ptr[len])))
  57         {
  58             ret = AL_TRUE;
  59             break;
  60         }
  61         if((ptr=strchr(ptr, ' ')) != NULL)
  62         {
  63             do {
  64                 ++ptr;
  65             } while(isspace(*ptr));
  66         }
  67     }
  68
  69 done:
  70     ALCcontext_DecRef(context);
  71     return ret;
  72 }
  73
  74
  75 AL_API ALvoid* AL_APIENTRY alGetProcAddress(const ALchar *funcName)
  76 {
  77     if(!funcName)
  78         return NULL;
  79     return alcGetProcAddress(NULL, funcName);
  80 }
  81
  82 AL_API ALenum AL_APIENTRY alGetEnumValue(const ALchar *enumName)
  83 {
  84     if(!enumName)
  85         return (ALenum)0;
  86     return alcGetEnumValue(NULL, enumName);
  87 }