COMMON: rand() replacment using PCG

Author: chrisws

src/common/random.c

@@ -1,22 +1,20 @@
 // This file is part of SmallBASIC
 //
-// lowlevel device (OS) I/O
+// random number generator, see:
+// https://en.wikipedia.org/wiki/Permuted_congruential_generator
+// https://www.pcg-random.org/download.html
 //
 // This program is distributed under the terms of the GPL v2.0 or later
 // Download the GNU Public License (GPL) from www.gnu.org
 //
-// Copyright(C) 2000 Nicholas Christopoulos
+// Copyright(C) 2021 Chris Warren-Smith
 
 #include "config.h"
 
 #include "common/sys.h"
 #include <stdint.h>
 #include <limits.h>
 
-// see:
-// https://en.wikipedia.org/wiki/Permuted_congruential_generator
-// https://www.pcg-random.org/download.html
-
 static uint64_t state      = 0x4d595df4d0f33173;
 static uint64_t multiplier = 6364136223846793005u;
 static uint64_t increment  = 1442695040888963407u;

src/platform/android/jni/common/Android.mk

@@ -31,6 +31,7 @@ LOCAL_SRC_FILES  :=    \
     $(COMMON)/device.c           \
     $(COMMON)/screen.c           \
     $(COMMON)/system.c           \
+    $(COMMON)/random.c           \
     $(COMMON)/eval.c             \
     $(COMMON)/extlib.c           \
     $(COMMON)/file.c             \