merge 'lennart' branch back into trunk.

git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@1971 fefdeb5f-60dc-0310-8127-8f9354f1896f

src/pulsecore/ltdl-helper.c

@@ -0,0 +1,64 @@
+/* $Id$ */
+
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2004-2006 Lennart Poettering
+  Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
+
+  PulseAudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as published
+  by the Free Software Foundation; either version 2 of the License,
+  or (at your option) any later version.
+
+  PulseAudio is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with PulseAudio; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+  USA.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdlib.h>
+#include <ctype.h>
+
+#include <pulse/xmalloc.h>
+#include <pulse/util.h>
+
+#include <pulsecore/core-util.h>
+#include <pulsecore/macro.h>
+
+#include "ltdl-helper.h"
+
+pa_void_func_t pa_load_sym(lt_dlhandle handle, const char *module, const char *symbol) {
+    char *sn, *c;
+    pa_void_func_t f;
+
+    pa_assert(handle);
+    pa_assert(module);
+    pa_assert(symbol);
+
+    if ((f = ((pa_void_func_t) (long) lt_dlsym(handle, symbol))))
+        return f;
+
+    /* As the .la files might have been cleansed from the system, we should
+     * try with the ltdl prefix as well. */
+
+    sn = pa_sprintf_malloc("%s_LTX_%s", module, symbol);
+
+    for (c = sn; *c; c++)
+        if (!isalnum(*c))
+            *c = '_';
+
+    f = (pa_void_func_t) (long) lt_dlsym(handle, sn);
+    pa_xfree(sn);
+
+    return f;
+}