--- /dev/null
+/*****************************************************************************
+ * override.c: overriden function calls for VLC media player
+ *****************************************************************************
+ * Copyright (C) 2010 Rémi Denis-Courmont
+ *
+ * This program 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 2.1 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <stdbool.h>
+
+void vlc_enable_override (void);
+
+static bool override = false;
+
+void vlc_enable_override (void)
+{
+ override = true;
+}
+
+#if defined (__GNUC__) /* typeof and statement-expression */ \
+ && (defined (__ELF__) && !defined (__sun__))
+/* Solaris crashes on printf("%s", NULL); which is legal, but annoying. */
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <dlfcn.h>
+
+static void vlogbug (const char *level, const char *func, const char *fmt,
+ va_list ap)
+{
+ flockfile (stderr);
+ fprintf (stderr, "%s: call to %s(", level, func);
+ vfprintf (stderr, fmt, ap);
+ fputs (")\n", stderr);
+ funlockfile (stderr);
+}
+
+static void logbug (const char *level, const char *func, const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start (ap, fmt);
+ vlogbug (level, func, fmt, ap);
+ va_end (ap);
+}
+
+static void *getsym (const char *name)
+{
+ void *sym = dlsym (RTLD_NEXT, name);
+ if (sym == NULL)
+ {
+ fprintf (stderr, "Cannot resolve symbol %s!\n", name);
+ abort ();
+ }
+ return sym;
+}
+
+#define LOG(level, ...) logbug(level, __func__, __VA_ARGS__)
+#define CALL(func, ...) \
+ ({ typeof (func) *sym = getsym ( # func); sym (__VA_ARGS__); })
+
+
+#endif /* __ELF__ */