[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/app/busybox/src/shell/random.h b/ap/app/busybox/src/shell/random.h
new file mode 100644
index 0000000..180c48a
--- /dev/null
+++ b/ap/app/busybox/src/shell/random.h
@@ -0,0 +1,33 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * $RANDOM support.
+ *
+ * Copyright (C) 2009 Denys Vlasenko
+ *
+ * Licensed under GPLv2, see file LICENSE in this source tree.
+ */
+#ifndef SHELL_RANDOM_H
+#define SHELL_RANDOM_H 1
+
+PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
+
+typedef struct random_t {
+ /* Random number generators */
+ int32_t galois_LFSR; /* Galois LFSR (fast but weak). signed! */
+ uint32_t LCG; /* LCG (fast but weak) */
+} random_t;
+
+#define UNINITED_RANDOM_T(rnd) \
+ ((rnd)->galois_LFSR == 0)
+
+#define INIT_RANDOM_T(rnd, nonzero, v) \
+ ((rnd)->galois_LFSR = (nonzero), (rnd)->LCG = (v))
+
+#define CLEAR_RANDOM_T(rnd) \
+ ((rnd)->galois_LFSR = 0)
+
+uint32_t next_random(random_t *rnd) FAST_FUNC;
+
+POP_SAVED_FUNCTION_VISIBILITY
+
+#endif