/*

** The OpenGL Extension Wrangler Library

** Copyright (C) 2002-2008, Milan Ikits <milan ikits[]ieee="" org=""></milan>

** Copyright (C) 2002-2008, Marcelo E. Magallon <mmagallo[]debian org=""></mmagallo[]debian>

** Copyright (C) 2002, Lev Povalahev

** All rights reserved.

** 

** Redistribution and use in source and binary forms, with or without 

** modification, are permitted provided that the following conditions are met:

** 

** * Redistributions of source code must retain the above copyright notice, 

**   this list of conditions and the following disclaimer.

** * Redistributions in binary form must reproduce the above copyright notice, 

**   this list of conditions and the following disclaimer in the documentation 

**   and/or other materials provided with the distribution.

** * The name of the author may be used to endorse or promote products 

**   derived from this software without specific prior written permission.

**

** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 

** AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 

** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

** ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 

** LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 

** CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 

** SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

** INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

** CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

** ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF

** THE POSSIBILITY OF SUCH DAMAGE.

*/

#ifndef __glew_utils_h__

#define __glew_utils_h__

#include <gl glew.h=""></gl>

#if defined(_WIN32)

#  include <gl wglew.h=""></gl>

#elif !defined(__ANDROID__) && (!defined(__APPLE__) || defined(GLEW_APPLE_GLX))

#  include <gl glxew.h=""></gl>

#endif

/*

 * Define glewGetContext and related helper macros.

 */

#ifdef GLEW_MX

#  define glewGetContext() ctx

#  ifdef _WIN32

#    define GLEW_CONTEXT_ARG_DEF_INIT GLEWContext* ctx

#    define GLEW_CONTEXT_ARG_VAR_INIT ctx

#    define wglewGetContext() ctx

#    define WGLEW_CONTEXT_ARG_DEF_INIT WGLEWContext* ctx

#    define WGLEW_CONTEXT_ARG_DEF_LIST WGLEWContext* ctx

#  else /* _WIN32 */

#    define GLEW_CONTEXT_ARG_DEF_INIT void

#    define GLEW_CONTEXT_ARG_VAR_INIT

#    define glxewGetContext() ctx

#    define GLXEW_CONTEXT_ARG_DEF_INIT void

#    define GLXEW_CONTEXT_ARG_DEF_LIST GLXEWContext* ctx

#  endif /* _WIN32 */

#  define GLEW_CONTEXT_ARG_DEF_LIST GLEWContext* ctx

#else /* GLEW_MX */

#  define GLEW_CONTEXT_ARG_DEF_INIT void

#  define GLEW_CONTEXT_ARG_VAR_INIT

#  define GLEW_CONTEXT_ARG_DEF_LIST void

#  define WGLEW_CONTEXT_ARG_DEF_INIT void

#  define WGLEW_CONTEXT_ARG_DEF_LIST void

#  define GLXEW_CONTEXT_ARG_DEF_INIT void

#  define GLXEW_CONTEXT_ARG_DEF_LIST void

#endif /* GLEW_MX */

/*

 * Define glewGetProcAddress.

 */

#if defined(_WIN32)

#  define glewGetProcAddress(name) wglGetProcAddress((LPCSTR)name)

#else

#  if defined(__APPLE__)

     extern void* NSGLGetProcAddress (const GLubyte* name);

#    define glewGetProcAddress(name) NSGLGetProcAddress(name)

#  else

#    if defined(__sgi) || defined(__sun)

       extern void* dlGetProcAddress (const GLubyte* name);

#      define glewGetProcAddress(name) dlGetProcAddress(name)

#    else /* __linux */

#      define glewGetProcAddress(name) (*glXGetProcAddressARB)(name)

#    endif

#  endif

#endif

/*

 * GLEW, just like OpenGL or GLU, does not rely on the standard C library.

 * These functions implement the string processing functionality required in the library.

 */

extern GLuint _glewStrLen (const GLubyte* s);

extern GLuint _glewStrCLen (const GLubyte* s, GLubyte c);

extern GLboolean _glewStrSame (const GLubyte* a, const GLubyte* b, GLuint n);

extern GLboolean _glewStrSame1 (GLubyte** a, GLuint* na, const GLubyte* b, GLuint nb);

extern GLboolean _glewStrSame2 (GLubyte** a, GLuint* na, const GLubyte* b, GLuint nb);

extern GLboolean _glewStrSame3 (GLubyte** a, GLuint* na, const GLubyte* b, GLuint nb)

#endif /* __glew_utils_h__ */