OpenAL32/alExtension.cpp

   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 <cstdlib>
  24 #include <cstring>
  25 #include <cctype>
  26
  27 #include "AL/al.h"
  28 #include "AL/alc.h"
  29
  30 #include "alMain.h"
  31 #include "alcontext.h"
  32 #include "alError.h"
  33
  34 AL_API ALboolean AL_APIENTRY alIsExtensionPresent(const ALchar *extName)
  35 {
  36     ContextRef context{GetContextRef()};
  37     if(UNLIKELY(!context)) return AL_FALSE;
  38
  39     if(!extName)
  40         SETERR_RETURN(context.get(), AL_INVALID_VALUE, AL_FALSE, "NULL pointer");
  41
  42     size_t len{strlen(extName)};
  43     const char *ptr{context->ExtensionList};
  44     while(ptr && *ptr)
  45     {
  46         if(strncasecmp(ptr, extName, len) == 0 &&
  47            (ptr[len] == '\0' || isspace(ptr[len])))
  48             return AL_TRUE;
  49
  50         if((ptr=strchr(ptr, ' ')) != nullptr)
  51         {
  52             do {
  53                 ++ptr;
  54             } while(isspace(*ptr));
  55         }
  56     }
  57
  58     return AL_FALSE;
  59 }
  60
  61
  62 AL_API ALvoid* AL_APIENTRY alGetProcAddress(const ALchar *funcName)
  63 {
  64     if(!funcName) return nullptr;
  65     return alcGetProcAddress(nullptr, funcName);
  66 }
  67
  68 AL_API ALenum AL_APIENTRY alGetEnumValue(const ALchar *enumName)
  69 {
  70     if(!enumName) return static_cast<ALenum>(0);
  71     return alcGetEnumValue(nullptr, enumName);
  72 }