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#include <revolution/os.h>
#include <revolution/nand.h>
#include <cstring>
static OSStateFlags StateFlags ATTRIBUTE_ALIGN(32);
static u32 CheckSum(OSStateFlags* flags) {
u32* ptr, i, sum;
ptr = (u32*)&flags->lastBootApp;
sum = 0;
for (i = 0; i < (sizeof(OSStateFlags) - 4) / 4; i++) {
sum = sum + *ptr;
ptr++;
}
return sum;
}
BOOL __OSWriteStateFlags(OSStateFlags* flags) {
NANDFileInfo fileInfo;
s32 result;
memcpy(&StateFlags, flags, sizeof(StateFlags));
StateFlags.checkSum = CheckSum(&StateFlags);
result = NANDOpen("/title/00000001/00000002/data/state.dat", &fileInfo, 2);
if (result == 0) {
result = NANDWrite(&fileInfo, &StateFlags, sizeof(StateFlags));
if (result != sizeof(StateFlags)) {
NANDClose(&fileInfo);
return FALSE;
}
result = NANDClose(&fileInfo);
if (result != 0) {
return FALSE;
}
} else {
return FALSE;
}
return TRUE;
}
BOOL __OSReadStateFlags(OSStateFlags* flags) {
NANDFileInfo fileInfo;
s32 result;
result = NANDOpen("/title/00000001/00000002/data/state.dat", &fileInfo, 1);
if (result == 0) {
result = NANDRead(&fileInfo, &StateFlags, sizeof(OSStateFlags));
NANDClose(&fileInfo);
if (result != sizeof(OSStateFlags)) {
NANDDelete("/title/00000001/00000002/data/state.dat");
memset(flags, 0, sizeof(StateFlags));
return FALSE;
}
} else {
memset(flags, 0, sizeof(OSStateFlags));
return FALSE;
}
if (CheckSum(&StateFlags) != StateFlags.checkSum) {
memset(flags, 0, sizeof(OSStateFlags));
return FALSE;
}
memcpy(flags, &StateFlags, sizeof(OSStateFlags));
return TRUE;
}
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