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authorMarcus Huderle <huderlem@gmail.com>2017-09-30 19:23:55 -0700
committerGitHub <noreply@github.com>2017-09-30 19:23:55 -0700
commit83efcc9c3d1e81b78c2cd9ceab3ac6420a5f4070 (patch)
tree19bbb03916702b468956e82ed2bbe6d259b77a85 /src/engine/rng.c
parent5fb9b9052276243d54ecfc27d0514e9c35825e8c (diff)
parent70c45eb2616195eb47b8bc67d03a1589cd6c56e6 (diff)
Merge pull request #411 from ProjectRevoTPP/refactor_src
split out src/ directory into categorized subdirectories.
Diffstat (limited to 'src/engine/rng.c')
-rw-r--r--src/engine/rng.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/src/engine/rng.c b/src/engine/rng.c
new file mode 100644
index 000000000..7d4b5600e
--- /dev/null
+++ b/src/engine/rng.c
@@ -0,0 +1,18 @@
+#include "global.h"
+#include "rng.h"
+
+// The number 1103515245 comes from the example implementation of rand and srand
+// in the ISO C standard.
+
+u32 gRngValue;
+
+u16 Random(void)
+{
+ gRngValue = 1103515245 * gRngValue + 24691;
+ return gRngValue >> 16;
+}
+
+void SeedRng(u16 seed)
+{
+ gRngValue = seed;
+}