Skip to content
Browse files

[droid] add an implementation of rand_r

Also create a place for us to add missing bionic functions. This is
_purposefully_ done inside of XBMC rather than as a separate helper-lib to
discourage adding stuff here. Instead, we should be pushing to get them into
the ndk.
  • Loading branch information...
1 parent 4a07cbe commit 92e2a05fc358092faf66c75c4fd8b9792f573298 Cory Fields committed Sep 24, 2012
View
1 Makefile.in
@@ -150,6 +150,7 @@ ifeq (@USE_ANDROID@,1)
DIRECTORY_ARCHIVES += xbmc/android/loader/AndroidDyload.a
DIRECTORY_ARCHIVES += xbmc/windowing/android/windowing_android.a
DIRECTORY_ARCHIVES += xbmc/android/activity/activity.a
+DIRECTORY_ARCHIVES += xbmc/android/bionic_supplement/bionic_supplement.a
endif
ifeq (@USE_AMLPLAYER@,1)
View
4 xbmc/Util.cpp
@@ -35,7 +35,9 @@
#include <unistd.h>
#include <sys/wait.h>
#endif
-
+#if defined(TARGET_ANDROID)
+#include "android/bionic_supplement/bionic_supplement.h"
+#endif
#include <stdlib.h>
#include "Application.h"
View
5 xbmc/android/bionic_supplement/Makefile
@@ -0,0 +1,5 @@
+SRCS = rand_r.c
+LIB = bionic_supplement.a
+
+include ../../../Makefile.include
+-include $(patsubst %.cpp,%.P,$(patsubst %.c,%.P,$(SRCS)))
View
30 xbmc/android/bionic_supplement/bionic_supplement.h
@@ -0,0 +1,30 @@
+#pragma once
+/*
+ * Copyright (C) 2012 Team XBMC
+ * http://www.xbmc.org
+ *
+ * This Program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with XBMC; see the file COPYING. If not, see
+ * <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+int rand_r (unsigned int *seed);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
View
48 xbmc/android/bionic_supplement/rand_r.c
@@ -0,0 +1,48 @@
+/* Reentrant random function frm POSIX.1c.
+ Copyright (C) 1996, 1999 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@cygnus.com <mailto:drepper@cygnus.com>>, 1996.
+
+ The GNU C Library 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.
+
+ The GNU C Library 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 the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <stdlib.h>
+
+
+/* This algorithm is mentioned in the ISO C standard, here extended
+ for 32 bits. */
+int rand_r (unsigned int *seed)
+{
+ unsigned int next = *seed;
+ int result;
+
+ next *= 1103515245;
+ next += 12345;
+ result = (unsigned int) (next / 65536) % 2048;
+
+ next *= 1103515245;
+ next += 12345;
+ result <<= 10;
+ result ^= (unsigned int) (next / 65536) % 1024;
+
+ next *= 1103515245;
+ next += 12345;
+ result <<= 10;
+ result ^= (unsigned int) (next / 65536) % 1024;
+
+ *seed = next;
+
+ return result;
+}

0 comments on commit 92e2a05

Please sign in to comment.
Something went wrong with that request. Please try again.