/* ----------------------------------------------------------------------------
Copyright (c) 2001-2002, 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.
------------------------------------------------------------------------------*/
/*
	Lev Povalahev

	levp@gmx.net

	http://www.uni-karlsruhe.de/~uli2/

*/

#include <stdio.h>
#include <string.h>
#include "extgl.h"
#include "common_tools.h"

void extgl_InitializeClass(JNIEnv *env, jclass clazz, int num_functions, JavaMethodAndExtFunction *functions) {
	ext_InitializeClass(env, clazz, &extgl_GetProcAddress, num_functions, functions);
}

bool extgl_InitializeFunctions(int num_functions, ExtFunction *functions) {
	return ext_InitializeFunctions(&extgl_GetProcAddress, num_functions, functions);
}

bool extgl_QueryExtension(const GLubyte*extensions, const char *name)
{
	const GLubyte *start;
	GLubyte *where, *terminator;

	if (extensions == NULL) {
		printfDebug("NULL extension string\n");
		return false;
	}

	/* Extension names should not have spaces. */
	where = (GLubyte *) strchr(name, ' ');
	if (where || *name == '\0')
		return false;

	/* It takes a bit of care to be fool-proof about parsing the
		 OpenGL extensions string. Don't be fooled by sub-strings,
		etc. */
	start = extensions;
	for (;;)
	{
		where = (GLubyte *) strstr((const char *) start, name);
		if (!where)
			break;
		terminator = where + strlen(name);
		if (where == start || *(where - 1) == ' ')
			if (*terminator == ' ' || *terminator == '\0') {
				return true;
			}
		start = terminator;
	}
	return false;

}