From 00896cb3b5813cb843e5e1abd4cbc9ff0ad3a632 Mon Sep 17 00:00:00 2001 From: camthesaxman Date: Tue, 5 Dec 2017 12:27:33 -0600 Subject: rename rng.c to random.c and rom4.c to overworld.c --- src/random.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 src/random.c (limited to 'src/random.c') 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; +} -- cgit v1.2.3