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authorDizzyEggg <jajkodizzy@wp.pl>2017-12-16 01:08:55 +0100
committerDizzyEggg <jajkodizzy@wp.pl>2017-12-16 01:08:55 +0100
commit44abbae60b6a39e2a1432426005e1860be196abb (patch)
treef2405db72863761afcdcda57a88cf6ab0346e4fd /src/random.c
parent039c9f4bd8ee6bfb299d4422372804c569eddebd (diff)
parent224fdbf026cfb0ff88aac519875a39fb038e4bb1 (diff)
nerge with master, fix conflicts
Diffstat (limited to 'src/random.c')
-rw-r--r--src/random.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/src/random.c b/src/random.c
new file mode 100644
index 000000000..f2f0ede58
--- /dev/null
+++ b/src/random.c
@@ -0,0 +1,32 @@
+#include "global.h"
+#include "random.h"
+
+// The number 1103515245 comes from the example implementation of rand and srand
+// in the ISO C standard.
+
+EWRAM_DATA static u8 sUnknown = 0;
+EWRAM_DATA static u32 sRandCount = 0;
+
+u16 Random(void)
+{
+ gRngValue = 1103515245 * gRngValue + 24691;
+ sRandCount++;
+ return gRngValue >> 16;
+}
+
+void SeedRng(u16 seed)
+{
+ gRngValue = seed;
+ sUnknown = 0;
+}
+
+void SeedRng2(u16 seed)
+{
+ gRng2Value = seed;
+}
+
+u16 Random2(void)
+{
+ gRng2Value = 1103515245 * gRng2Value + 24691;
+ return gRng2Value >> 16;
+}