let deltachat-core release strings previously returned

deltachat-ios/AppDelegate.swift

@@ -32,7 +32,7 @@ class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterD
     private func getCoreInfo() -> [[String]] {
         if let cString = dc_get_info(mailboxPointer) {
             let info = String(cString: cString)
-            free(cString)
+            dc_str_unref(cString)
             logger.info(info)
             return info.components(separatedBy: "\n").map { val in
                 val.components(separatedBy: "=")

deltachat-ios/Controller/AccountSetupController.swift

@@ -579,7 +579,7 @@ class AccountSetupController: UITableViewController {
 
             if let cString = dc_imex_has_backup(mailboxPointer, documents[0]) {
                 let file = String(cString: cString)
-                free(cString)
+                dc_str_unref(cString)
                 logger.info("restoring backup: \(file)")
                 showProgressHud()
                 dc_imex(mailboxPointer, DC_IMEX_IMPORT_BACKUP, file, nil)

deltachat-ios/Controller/ChatViewController.swift

@@ -200,7 +200,7 @@ class ChatViewController: MessagesViewController {
         if let draft = dc_get_draft(mailboxPointer, UInt32(chatId)) {
             if let cString = dc_msg_get_text(draft) {
                 let swiftString = String(cString: cString)
-                free(cString)
+                dc_str_unref(cString)
                 dc_msg_unref(draft)
                 return swiftString
             }

deltachat-ios/DC/Wrapper.swift

@@ -38,7 +38,7 @@ class DcContext {
     func getSecurejoinQr (chatId: Int) -> String? {
         if let cString = dc_get_securejoin_qr(self.contextPointer, UInt32(chatId)) {
             let swiftString = String(cString: cString)
-            free(cString)
+            dc_str_unref(cString)
             return swiftString
         }
         return nil
@@ -59,7 +59,7 @@ class DcContext {
     func getMsgInfo(msgId: Int) -> String {
         if let cString = dc_get_msg_info(self.contextPointer, UInt32(msgId)) {
             let swiftString = String(cString: cString)
-            free(cString)
+            dc_str_unref(cString)
             return swiftString
         }
         return "ErrGetMsgInfo"
@@ -68,7 +68,7 @@ class DcContext {
     func initiateKeyTransfer() -> String? {
         if let cString = dc_initiate_key_transfer(self.contextPointer) {
             let swiftString = String(cString: cString)
-            free(cString)
+            dc_str_unref(cString)
             return swiftString
         }
         return nil
@@ -83,7 +83,7 @@ class DcConfig {
     private class func getConfig(_ key: String) -> String? {
         guard let cString = dc_get_config(mailboxPointer, key) else { return nil }
         let value = String(cString: cString)
-        free(cString)
+        dc_str_unref(cString)
         if value.isEmpty {
             return nil
         }
@@ -372,7 +372,7 @@ class DcChat {
     var name: String {
         guard let cString = dc_chat_get_name(chatPointer) else { return "" }
         let swiftString = String(cString: cString)
-        free(cString)
+        dc_str_unref(cString)
         return swiftString
     }
 
@@ -399,7 +399,7 @@ class DcChat {
     lazy var profileImage: UIImage? = { [unowned self] in
         guard let cString = dc_chat_get_profile_image(chatPointer) else { return nil }
         let filename = String(cString: cString)
-        free(cString)
+        dc_str_unref(cString)
         let path: URL = URL(fileURLWithPath: filename, isDirectory: false)
         if path.isFileURL {
             do {
@@ -417,7 +417,7 @@ class DcChat {
     var subtitle: String? {
         if let cString = dc_chat_get_subtitle(chatPointer) {
             let str = String(cString: cString)
-            free(cString)
+            dc_str_unref(cString)
             return str.isEmpty ? nil : str
         }
         return nil
@@ -526,7 +526,7 @@ class DcMsg: MessageType {
     var text: String? {
         guard let cString = dc_msg_get_text(messagePointer) else { return nil }
         let swiftString = String(cString: cString)
-        free(cString)
+        dc_str_unref(cString)
         return swiftString
     }
 
@@ -584,7 +584,7 @@ class DcMsg: MessageType {
     var file: String? {
         if let cString = dc_msg_get_file(messagePointer) {
             let str = String(cString: cString)
-            free(cString)
+            dc_str_unref(cString)
             return str.isEmpty ? nil : str
         }
 
@@ -594,7 +594,7 @@ class DcMsg: MessageType {
     var filemime: String? {
         if let cString = dc_msg_get_filemime(messagePointer) {
             let str = String(cString: cString)
-            free(cString)
+            dc_str_unref(cString)
             return str.isEmpty ? nil : str
         }
 
@@ -604,7 +604,7 @@ class DcMsg: MessageType {
     var filename: String? {
         if let cString = dc_msg_get_filename(messagePointer) {
             let str = String(cString: cString)
-            free(cString)
+            dc_str_unref(cString)
             return str.isEmpty ? nil : str
         }
 
@@ -663,14 +663,14 @@ class DcMsg: MessageType {
     var setupCodeBegin: String {
         guard let cString = dc_msg_get_setupcodebegin(messagePointer) else { return "" }
         let swiftString = String(cString: cString)
-        free(cString)
+        dc_str_unref(cString)
         return swiftString
     }
 
     func summary(chars: Int) -> String? {
         guard let cString = dc_msg_get_summarytext(messagePointer, Int32(chars)) else { return nil }
         let swiftString = String(cString: cString)
-        free(cString)
+        dc_str_unref(cString)
         return swiftString
     }
 
@@ -694,28 +694,28 @@ class DcContact {
     var displayName: String {
         guard let cString = dc_contact_get_display_name(contactPointer) else { return "" }
         let swiftString = String(cString: cString)
-        free(cString)
+        dc_str_unref(cString)
         return swiftString
     }
 
     var nameNAddr: String {
         guard let cString = dc_contact_get_name_n_addr(contactPointer) else { return "" }
         let swiftString = String(cString: cString)
-        free(cString)
+        dc_str_unref(cString)
         return swiftString
     }
 
     var name: String {
         guard let cString = dc_contact_get_name(contactPointer) else { return "" }
         let swiftString = String(cString: cString)
-        free(cString)
+        dc_str_unref(cString)
         return swiftString
     }
 
     var email: String {
         guard let cString = dc_contact_get_addr(contactPointer) else { return "" }
         let swiftString = String(cString: cString)
-        free(cString)
+        dc_str_unref(cString)
         return swiftString
     }
 
@@ -730,7 +730,7 @@ class DcContact {
     lazy var profileImage: UIImage? = { [unowned self] in
         guard let cString = dc_contact_get_profile_image(contactPointer) else { return nil }
         let filename = String(cString: cString)
-        free(cString)
+        dc_str_unref(cString)
         let path: URL = URL(fileURLWithPath: filename, isDirectory: false)
         if path.isFileURL {
             do {
@@ -780,7 +780,7 @@ class DcLot {
     var text1: String? {
         guard let cString = dc_lot_get_text1(dcLotPointer) else { return nil }
         let swiftString = String(cString: cString)
-        free(cString)
+        dc_str_unref(cString)
         return swiftString
     }
 
@@ -791,7 +791,7 @@ class DcLot {
     var text2: String? {
         guard let cString = dc_lot_get_text2(dcLotPointer) else { return nil }
         let swiftString = String(cString: cString)
-        free(cString)
+        dc_str_unref(cString)
         return swiftString
     }