1*da2e3ebdSchin /*********************************************************************** 2*da2e3ebdSchin * * 3*da2e3ebdSchin * This software is part of the ast package * 4*da2e3ebdSchin * Copyright (c) 1997-2007 AT&T Knowledge Ventures * 5*da2e3ebdSchin * and is licensed under the * 6*da2e3ebdSchin * Common Public License, Version 1.0 * 7*da2e3ebdSchin * by AT&T Knowledge Ventures * 8*da2e3ebdSchin * * 9*da2e3ebdSchin * A copy of the License is available at * 10*da2e3ebdSchin * http://www.opensource.org/licenses/cpl1.0.txt * 11*da2e3ebdSchin * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 12*da2e3ebdSchin * * 13*da2e3ebdSchin * Information and Software Systems Research * 14*da2e3ebdSchin * AT&T Research * 15*da2e3ebdSchin * Florham Park NJ * 16*da2e3ebdSchin * * 17*da2e3ebdSchin * Glenn Fowler <gsf@research.att.com> * 18*da2e3ebdSchin * * 19*da2e3ebdSchin ***********************************************************************/ 20*da2e3ebdSchin #pragma prototyped 21*da2e3ebdSchin /* 22*da2e3ebdSchin * Glenn Fowler 23*da2e3ebdSchin * AT&T Research 24*da2e3ebdSchin */ 25*da2e3ebdSchin 26*da2e3ebdSchin #include <ast.h> 27*da2e3ebdSchin #include <dlldefs.h> 28*da2e3ebdSchin 29*da2e3ebdSchin /* 30*da2e3ebdSchin * dlsym() with `_' weak fallback 31*da2e3ebdSchin */ 32*da2e3ebdSchin 33*da2e3ebdSchin void* 34*da2e3ebdSchin dlllook(void* dll, const char* name) 35*da2e3ebdSchin { 36*da2e3ebdSchin register void* addr; 37*da2e3ebdSchin char buf[256]; 38*da2e3ebdSchin 39*da2e3ebdSchin if (!(addr = dlsym(dll, name)) && strlen(name) < (sizeof(buf) - 2)) 40*da2e3ebdSchin { 41*da2e3ebdSchin buf[0] = '_'; 42*da2e3ebdSchin strcpy(buf + 1, name); 43*da2e3ebdSchin addr = dlsym(dll, buf); 44*da2e3ebdSchin } 45*da2e3ebdSchin return addr; 46*da2e3ebdSchin } 47