FileSys/Kernel: Implement GetSize service call for File objects.

src/core/file_sys/file.h

@@ -43,6 +43,13 @@ public:
      */
     virtual size_t GetSize() const = 0;
 
+    /**
+     * Set the size of the file in bytes
+     * @param size New size of the file
+     * @return true if successful
+     */
+    virtual bool SetSize(const u64 size) const = 0;
+
     /**
      * Close the file
      * @return true if the file closed correctly

src/core/file_sys/file_romfs.cpp

@@ -48,6 +48,15 @@ size_t File_RomFS::GetSize() const {
     return -1;
 }
 
+/**
+ * Set the size of the file in bytes
+ * @param size New size of the file
+ * @return true if successful
+ */
+bool File_RomFS::SetSize(const u64 size) const {
+    return false;
+}
+
 /**
  * Close the file
  * @return true if the file closed correctly

src/core/file_sys/file_romfs.h

@@ -44,6 +44,13 @@ public:
      */
     size_t GetSize() const override;
 
+    /**
+     * Set the size of the file in bytes
+     * @param size New size of the file
+     * @return true if successful
+     */
+    bool SetSize(const u64 size) const override;
+
     /**
      * Close the file
      * @return true if the file closed correctly

src/core/file_sys/file_sdmc.cpp

@@ -75,6 +75,17 @@ size_t File_SDMC::GetSize() const {
     return file->GetSize();
 }
 
+/**
+ * Set the size of the file in bytes
+ * @param size New size of the file
+ * @return true if successful
+ */
+bool File_SDMC::SetSize(const u64 size) const {
+    file->Resize(size);
+    file->Flush();
+    return true;
+}
+
 /**
  * Close the file
  * @return true if the file closed correctly

src/core/file_sys/file_sdmc.h

@@ -47,6 +47,13 @@ public:
      */
     size_t GetSize() const override;
 
+    /**
+     * Set the size of the file in bytes
+     * @param size New size of the file
+     * @return true if successful
+     */
+    bool SetSize(const u64 size) const override;
+
     /**
      * Close the file
      * @return true if the file closed correctly

src/core/hle/kernel/archive.cpp

@@ -181,6 +181,14 @@ public:
             break;
         }
 
+        case FileCommand::SetSize:
+        {
+            u64 size = cmd_buff[1] | ((u64)cmd_buff[2] << 32);
+            DEBUG_LOG(KERNEL, "SetSize %s %s size=%d", GetTypeName().c_str(), GetName().c_str(), size);
+            backend->SetSize(size);
+            break;
+        }
+
         case FileCommand::Close:
         {
             DEBUG_LOG(KERNEL, "Close %s %s", GetTypeName().c_str(), GetName().c_str());