dlllook.c   [plain text]

/***********************************************************************
*                                                                      *
*               This software is part of the ast package               *
*           Copyright (c) 1997-2007 AT&T Knowledge Ventures            *
*                      and is licensed under the                       *
*                  Common Public License, Version 1.0                  *
*                      by AT&T Knowledge Ventures                      *
*                                                                      *
*                A copy of the License is available at                 *
*            http://www.opensource.org/licenses/cpl1.0.txt             *
*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
*                                                                      *
*              Information and Software Systems Research               *
*                            AT&T Research                             *
*                           Florham Park NJ                            *
*                                                                      *
*                 Glenn Fowler <gsf@research.att.com>                  *
*                                                                      *
***********************************************************************/
#pragma prototyped
/*
 * Glenn Fowler
 * AT&T Research
 */

#include <ast.h>
#include <dlldefs.h>

/*
 * dlsym() with `_' weak fallback
 */

void*
dlllook(void* dll, const char* name)
{
	register void*	addr;
	char		buf[256];

	if (!(addr = dlsym(dll, name)) && strlen(name) < (sizeof(buf) - 2))
	{
		buf[0] = '_';
		strcpy(buf + 1, name);
		addr = dlsym(dll, buf);
	}
	return addr;
}