LowLevel/Luma3DS-3GX
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cheats: don't use rand()

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This commit is contained in:
TuxSH 2020-04-26 11:47:15 +01:00
parent a6d92ed8fe
commit 37c5c6f049
3 changed files with 18 additions and 2 deletions
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3
sysmodules/rosalina/include/menus/cheats.h
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@ -33,4 +33,5 @@
#define CHEATS_PER_MENU_PAGE 18 #define CHEATS_PER_MENU_PAGE 18
void RosalinaMenu_Cheats(void); void RosalinaMenu_Cheats(void);
void Cheat_ApplyCheats(); void Cheat_SeedRng(u64 seed);
void Cheat_ApplyCheats(void);

3
sysmodules/rosalina/source/main.c
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@ -37,6 +37,7 @@
#include "menus/miscellaneous.h" #include "menus/miscellaneous.h"
#include "menus/debugger.h" #include "menus/debugger.h"
#include "menus/screen_filters.h" #include "menus/screen_filters.h"
#include "menus/cheats.h"
#include "task_runner.h" #include "task_runner.h"
@ -193,6 +194,8 @@ int main(void)
if(R_FAILED(svcCreateEvent(&terminationRequestEvent, RESET_STICKY))) if(R_FAILED(svcCreateEvent(&terminationRequestEvent, RESET_STICKY)))
svcBreak(USERBREAK_ASSERT); svcBreak(USERBREAK_ASSERT);
Cheat_SeedRng(svcGetSystemTick());
MyThread *menuThread = menuCreateThread(); MyThread *menuThread = menuCreateThread();
MyThread *taskRunnerThread = taskRunnerCreateThread(); MyThread *taskRunnerThread = taskRunnerCreateThread();
MyThread *errDispThread = errDispCreateThread(); MyThread *errDispThread = errDispCreateThread();

14
sysmodules/rosalina/source/menus/cheats.c
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@ -96,6 +96,7 @@ typedef struct CheatState
CheatState cheat_state = { 0 }; CheatState cheat_state = { 0 };
u8 cheatCount = 0; u8 cheatCount = 0;
u64 cheatTitleInfo = -1ULL; u64 cheatTitleInfo = -1ULL;
u64 cheatRngState = 0;
static inline u32* activeOffset() static inline u32* activeOffset()
{ {
@ -114,6 +115,12 @@ static inline u32* activeStorage(CheatDescription* desc)
char failureReason[64]; char failureReason[64];
static u32 Cheat_GetRandomNumber(void)
{
cheatRngState = 0x5D588B656C078965ULL * cheatRngState + 0x0000000000269EC3ULL;
return (u32)(cheatRngState >> 32);
}
static bool Cheat_IsValidAddress(const Handle processHandle, u32 address, u32 size) static bool Cheat_IsValidAddress(const Handle processHandle, u32 address, u32 size)
{ {
MemInfo info; MemInfo info;
@ -1477,7 +1484,7 @@ static u32 Cheat_ApplyCheat(const Handle processHandle, CheatDescription* const
case 0xF: case 0xF:
{ {
u32 range = arg1 - (arg0 & 0xFFFFFF); u32 range = arg1 - (arg0 & 0xFFFFFF);
u32 number = rand() % range; u32 number = Cheat_GetRandomNumber() % range;
*activeData() = (arg0 & 0xFFFFFF) + number; *activeData() = (arg0 & 0xFFFFFF) + number;
} }
break; break;
@ -1862,6 +1869,11 @@ static u32 Cheat_GetCurrentTitleId(u64* titleId)
return res; return res;
} }
void Cheat_SeedRng(u64 seed)
{
cheatRngState = seed;
}
void Cheat_ApplyCheats(void) void Cheat_ApplyCheats(void)
{ {
if (!cheatCount) if (!cheatCount)