UnkFlagStuff cleanup

1 files changed, 63 insertions, 0 deletions

diff --git a/src/toBeSorted/unk_flag_stuff.cpp b/src/toBeSorted/unk_flag_stuff.cpp
new file mode 100644
index 00000000..e755a7a5
--- /dev/null
+++ b/src/toBeSorted/unk_flag_stuff.cpp
@@ -0,0 +1,63 @@
+#pragma once
+
+#include <toBeSorted/unk_flag_stuff.h>
+
+u16 UnkFlagStuff::calculateMask(s32 shift) {
+    return (2 << (shift & 0xF)) - 1;
+}
+
+void UnkFlagStuff::doNothing(u32 unused) {}
+
+UnkFlagStuff::UnkFlagStuff(u16 count, UnkFlagDefinition* definitions) {
+    this->mDefinitionsCount = count;
+    this->mpDefinitions = definitions;
+}
+
+void UnkFlagStuff::prepareIndexShiftMask(u16 counterIdx, u32 unused, u16* indexPtr, u8* shiftPtr, u16* maskPtr) {
+    doNothing(counterIdx);
+    *indexPtr = mpDefinitions[counterIdx].mIndex;
+    *shiftPtr = mpDefinitions[counterIdx].mShiftMask >> 4;
+    *maskPtr = calculateMask(mpDefinitions[counterIdx].mShiftMask);
+}
+
+u16 UnkFlagStuff::maskForIdx(u16 index) {
+    doNothing(index);
+
+    return calculateMask(mpDefinitions[index].mShiftMask);
+}
+
+u32 UnkFlagStuff::getCounterOrFlag(u16 counterIdx, u16* dataPtr, u32 param4) {
+    u16 index = 0;
+    u8 shift = 0;
+    u16 mask = 0;
+    prepareIndexShiftMask(counterIdx, param4, &index, &shift, &mask);
+    return mask & (dataPtr[index] >> shift);
+}
+
+void UnkFlagStuff::setCounterOrFlag(u16 counterIdx, u16* dataPtr, u32 flagCount, u32 value) {
+    u16 index = 0;
+    u8 shift = 0;
+    u16 mask = 0;
+    prepareIndexShiftMask(counterIdx, flagCount, &index, &shift, &mask);
+    dataPtr[index] &= ~(mask << shift);
+    dataPtr[index] = (u16)(value << shift) | dataPtr[index];
+}
+
+inline bool isLessThan(int a, int b) {
+    return a <= b;
+}
+
+u32 UnkFlagStuff::checkFlagValid(u16 counterIdx, u32 flagCount) {
+    if (mpDefinitions == nullptr) {
+        return 0;
+    }
+    if (mDefinitionsCount <= counterIdx || mpDefinitions[counterIdx].mIndex == 0xFF) {
+        return 0;
+    } else {
+        if (isLessThan(flagCount, mpDefinitions[counterIdx].mIndex)) {
+            return 0;
+        } else {
+            return 1;
+        }
+    }
+}