2 files changed, 20 insertions, 12 deletions

diff --git a/src/script/api/script_company.cpp b/src/script/api/script_company.cpp
index 53f58c914..a5fecf8ea 100644
--- a/src/script/api/script_company.cpp
+++ b/src/script/api/script_company.cpp
@@ -196,11 +196,11 @@
 	return LOAN_INTERVAL;
 }
 
-/* static */ bool ScriptCompany::SetLoanAmount(int32 loan)
+/* static */ bool ScriptCompany::SetLoanAmount(Money loan)
 {
 	EnforcePrecondition(false, ScriptObject::GetCompany() != OWNER_DEITY);
 	EnforcePrecondition(false, loan >= 0);
-	EnforcePrecondition(false, (loan % GetLoanInterval()) == 0);
+	EnforcePrecondition(false, ((int64)loan % GetLoanInterval()) == 0);
 	EnforcePrecondition(false, loan <= GetMaxLoanAmount());
 	EnforcePrecondition(false, (loan - GetLoanAmount() + GetBankBalance(COMPANY_SELF)) >= 0);
 
@@ -211,12 +211,12 @@
 			(loan > GetLoanAmount()) ? CMD_INCREASE_LOAN : CMD_DECREASE_LOAN);
 }
 
-/* static */ bool ScriptCompany::SetMinimumLoanAmount(int32 loan)
+/* static */ bool ScriptCompany::SetMinimumLoanAmount(Money loan)
 {
 	EnforcePrecondition(false, ScriptObject::GetCompany() != OWNER_DEITY);
 	EnforcePrecondition(false, loan >= 0);
 
-	int32 over_interval = loan % GetLoanInterval();
+	Money over_interval = (int64)loan % GetLoanInterval();
 	if (over_interval != 0) loan += GetLoanInterval() - over_interval;
 
 	EnforcePrecondition(false, loan <= GetMaxLoanAmount());
@@ -226,10 +226,12 @@
 	return GetLoanAmount() == loan;
 }
 
-/* static */ bool ScriptCompany::ChangeBankBalance(CompanyID company, int32 delta, ExpensesType expenses_type)
+/* static */ bool ScriptCompany::ChangeBankBalance(CompanyID company, Money delta, ExpensesType expenses_type)
 {
 	EnforcePrecondition(false, ScriptObject::GetCompany() == OWNER_DEITY);
 	EnforcePrecondition(false, expenses_type < (ExpensesType)::EXPENSES_END);
+	EnforcePrecondition(false, delta >= INT32_MIN);
+	EnforcePrecondition(false, delta <= INT32_MAX);
 
 	company = ResolveCompanyID(company);
 	EnforcePrecondition(false, company != COMPANY_INVALID);
@@ -280,12 +282,14 @@
 	return ::Company::Get((CompanyID)company)->settings.engine_renew_months;
 }
 
-/* static */ bool ScriptCompany::SetAutoRenewMoney(uint32 money)
+/* static */ bool ScriptCompany::SetAutoRenewMoney(Money money)
 {
+	EnforcePrecondition(false, money >= 0);
+	EnforcePrecondition(false, (int64)money <= UINT32_MAX);
 	return ScriptObject::DoCommand(0, ::GetCompanySettingIndex("company.engine_renew_money"), money, CMD_CHANGE_COMPANY_SETTING);
 }
 
-/* static */ uint32 ScriptCompany::GetAutoRenewMoney(CompanyID company)
+/* static */ Money ScriptCompany::GetAutoRenewMoney(CompanyID company)
 {
 	company = ResolveCompanyID(company);
 	if (company == COMPANY_INVALID) return 0;
diff --git a/src/script/api/script_company.hpp b/src/script/api/script_company.hpp
index 00adc795f..532793081 100644
--- a/src/script/api/script_company.hpp
+++ b/src/script/api/script_company.hpp
@@ -145,7 +145,7 @@ public:
 	 * @game @pre Valid ScriptCompanyMode active in scope.
 	 * @return True if the loan could be set to your requested amount.
 	 */
-	static bool SetLoanAmount(int32 loan);
+	static bool SetLoanAmount(Money loan);
 
 	/**
 	 * Sets the minimum amount to loan, i.e. the given amount of loan rounded up.
@@ -155,7 +155,7 @@ public:
 	 * @game @pre Valid ScriptCompanyMode active in scope.
 	 * @return True if we could allocate a minimum of 'loan' loan.
 	 */
-	static bool SetMinimumLoanAmount(int32 loan);
+	static bool SetMinimumLoanAmount(Money loan);
 
 	/**
 	 * Gets the amount your company have loaned.
@@ -194,10 +194,12 @@ public:
 	 * @param expenses_type The account in the finances window that will register the cost.
 	 * @game @pre No ScriptCompanyMode active in scope.
 	 * @pre ResolveCompanyID(company) != COMPANY_INVALID.
+	 * @pre delta >= -2**31
+	 * @pre delta <   2**31
 	 * @note You need to create your own news message to inform about costs/gifts that you create using this command.
 	 * @api -ai
 	 */
-	static bool ChangeBankBalance(CompanyID company, int32 delta, ExpensesType expenses_type);
+	static bool ChangeBankBalance(CompanyID company, Money delta, ExpensesType expenses_type);
 
 	/**
 	 * Get the income of the company in the given quarter.
@@ -314,9 +316,11 @@ public:
 	 * Set the minimum money needed to autorenew an engine for your company.
 	 * @param money The new minimum required money for autorenew to work.
 	 * @return True if autorenew money has been modified.
+	 * @pre money >= 0
+	 * @pre money <  2**32
 	 * @api -game
 	 */
-	static bool SetAutoRenewMoney(uint32 money);
+	static bool SetAutoRenewMoney(Money money);
 
 	/**
 	 * Return the minimum money needed to autorenew an engine for a company.
@@ -324,7 +328,7 @@ public:
 	 * @pre ResolveCompanyID(company) != COMPANY_INVALID.
 	 * @return The minimum required money for autorenew to work.
 	 */
-	static uint32 GetAutoRenewMoney(CompanyID company);
+	static Money GetAutoRenewMoney(CompanyID company);
 };
 
 DECLARE_POSTFIX_INCREMENT(ScriptCompany::CompanyID)