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Implementing small loan & cheat detection related routine

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This commit is contained in:
Maciek Baron
2014-05-17 16:04:19 +01:00
parent 9e0c310320
commit d5d352cd41
4 changed files with 19 additions and 6 deletions
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18
src/finance.c
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@@ -149,11 +149,11 @@ void finance_init() {
RCT2_GLOBAL(0x01358334, uint32) = 0;
RCT2_GLOBAL(0x01358338, uint16) = 0;
RCT2_GLOBAL(0x013573DC, uint32) = 100000; // Cheat detection
RCT2_GLOBAL(0x013573DC, sint32) = 100000; // Cheat detection
RCT2_GLOBAL(RCT2_ADDRESS_CURRENT_MONEY_ENCRYPTED, sint32) = ENCRYPT_MONEY(100000);
RCT2_GLOBAL(RCT2_ADDRESS_CURRENT_LOAN, sint32) = 100000;
RCT2_GLOBAL(RCT2_ADDRESS_MAXIMUM_LOAN, uint32) = 200000;
RCT2_GLOBAL(RCT2_ADDRESS_MAXIMUM_LOAN, sint32) = 200000;
RCT2_GLOBAL(0x013587D0, uint32) = 0;
@@ -166,5 +166,17 @@ void finance_init() {
RCT2_GLOBAL(0x013587D8, uint16) = 0x3F;
RCT2_CALLPROC_EBPSAFE(0x0069E869);
sub_69E869();
}
void sub_69E869() {
// This subroutine is loan related and is used for cheat detection
sint32 value = 0x70093A;
value -= RCT2_GLOBAL(0x013573DC, sint32); // Cheat detection
value = ror32(value, 5);
value -= RCT2_GLOBAL(RCT2_ADDRESS_CURRENT_LOAN, sint32);
value = ror32(value, 7);
value += RCT2_GLOBAL(RCT2_ADDRESS_MAXIMUM_LOAN, sint32);
value = ror32(value, 3);
RCT2_GLOBAL(0x013587C4, sint32) = value;
}

1
src/finance.h
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@@ -41,5 +41,6 @@ void finance_pay_research();
void finance_pay_interest();
void finance_pay_ride_upkeep();
void finance_init();
void sub_69E869();
#endif

2
src/game.c
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@@ -1519,7 +1519,7 @@ int game_load_save()
window_new_ride_init_vars();
RCT2_GLOBAL(0x009DEB7C, uint16) = 0;
if (RCT2_GLOBAL(0x0013587C4, uint32) == 0) // this check is not in scenario play
RCT2_CALLPROC_EBPSAFE(0x0069E869);
sub_69E869();
RCT2_CALLPROC_EBPSAFE(0x006837E3); // (palette related)
gfx_invalidate_screen();

4
src/scenario.c
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@@ -466,7 +466,7 @@ void scenario_load_and_play(rct_scenario_basic *scenario)
RCT2_GLOBAL(RCT2_ADDRESS_CURRENT_COMPANY_VALUE, sint16) = calculate_company_value();
RCT2_GLOBAL(0x013587D0, sint16) = RCT2_GLOBAL(0x013573DC, sint16) - RCT2_GLOBAL(RCT2_ADDRESS_CURRENT_LOAN, sint16);
RCT2_GLOBAL(RCT2_ADDRESS_CURRENT_MONEY_ENCRYPTED, sint32) = ENCRYPT_MONEY(RCT2_GLOBAL(0x013573DC, sint32));
RCT2_CALLPROC_EBPSAFE(0x0069E869); // (loan related)
sub_69E869(); // (loan related)
strcpy((char*)RCT2_ADDRESS_SCENARIO_DETAILS, s6Info->details);
strcpy((char*)RCT2_ADDRESS_SCENARIO_NAME, s6Info->name);
@@ -508,7 +508,7 @@ void scenario_load_and_play(rct_scenario_basic *scenario)
RCT2_GLOBAL(RCT2_ADDRESS_TOTAL_ADMISSIONS, uint32) = 0;
RCT2_GLOBAL(RCT2_ADDRESS_INCOME_FROM_ADMISSIONS, uint32) = 0;
RCT2_GLOBAL(0x013587D8, uint16) = 63;
RCT2_CALLPROC_EBPSAFE(0x0069E869); // (loan related, called above already)
sub_69E869(); // (loan related, called above already)
park_reset_awards_and_history();
reset_all_ride_build_dates();
date_reset();