libvlc os-specific path discovery

Get the right libvlc path in macosx and win32 to reside in the specific.c files.
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

src/misc/darwin_specific.c

@@ -30,7 +30,8 @@
 #include <vlc_common.h>
 #include "../libvlc.h"
 #include <dirent.h>                                                /* *dir() */
-
+#include <libgen.h>
+#include <dlfcn.h>
 #include <CoreFoundation/CoreFoundation.h>
 #include <mach-o/dyld.h>
 
@@ -79,7 +80,14 @@ void system_Init( libvlc_int_t *p_this, int *pi_argc, const char *ppsz_argv[] )
                 p_char = NULL;
         }
     }
-
+    if ( !p_char )
+    {
+        /* We are not linked to the VLC.framework, let's use dladdr to figure
+         * libvlc path */
+        Dl_info info;
+        if( dladdr(system_Init, &info) )
+            p_char = strdup(dirname( info.dli_fname ));
+    }
     if( !p_char )
     {
         char path[MAXPATHLEN+1];

src/win32/specific.c

@@ -48,18 +48,23 @@ void system_Init( libvlc_int_t *p_this, int *pi_argc, const char *ppsz_argv[] )
 {
     VLC_UNUSED( p_this ); VLC_UNUSED( pi_argc ); VLC_UNUSED( ppsz_argv );
     WSADATA Data;
+    MEMORY_BASIC_INFORMATION mbi;
 
     /* Get our full path */
     char psz_path[MAX_PATH];
     char *psz_vlc;
 
     wchar_t psz_wpath[MAX_PATH];
-    if( GetModuleFileName( NULL, psz_wpath, MAX_PATH ) )
+    if( VirtualQuery(system_Init, &mbi, sizeof(mbi) ) )
+    {
+        HMODULE hMod = (HMODULE) mbi.AllocationBase;
+        if( GetModuleFileName( hMod, psz_wpath, MAX_PATH ) )
         {
             WideCharToMultiByte( CP_UTF8, 0, psz_wpath, -1,
                                 psz_path, MAX_PATH, NULL, NULL );
         }
         else psz_path[0] = '\0';
+    }
 
     if( (psz_vlc = strrchr( psz_path, '\\' )) ) *psz_vlc = '\0';