force random function to wrap at 32 bits

ianfixes · ianfixes · commit b5b45a3b105a · 2018-05-06T08:29:31.000-04:00
diff --git a/cpp/arduino/Godmode.cpp b/cpp/arduino/Godmode.cpp
@@ -38,6 +38,7 @@ long random(long vmax)
 {
   GodmodeState* godmode = GODMODE();
   godmode->seed += 4294967291;  // it's a prime that fits in 32 bits
+  godmode->seed = godmode->seed % 4294967296; // explicitly wrap in case we're on a 64-bit impl
   return godmode->seed % vmax;
 }
 

Original file line number	Diff line number	Diff line change
`@@ -38,6 +38,7 @@ long random(long vmax)`
`38`	`38`	`{`
`39`	`39`	`GodmodeState* godmode = GODMODE();`
`40`	`40`	`godmode->seed += 4294967291; // it's a prime that fits in 32 bits`
	`41`	`+ godmode->seed = godmode->seed % 4294967296; // explicitly wrap in case we're on a 64-bit impl`
`41`	`42`	`return godmode->seed % vmax;`
`42`	`43`	`}`
`43`	`44`