loader: Expose program title.

src/core/loader/loader.h

@@ -166,6 +166,15 @@ public:
         return ResultStatus::ErrorNotImplemented;
     }
 
+    /**
+     * Get the title of the application
+     * @param title Reference to store the application title into
+     * @return ResultStatus result of function
+     */
+    virtual ResultStatus ReadTitle(std::string& title) {
+        return ResultStatus::ErrorNotImplemented;
+    }
+
 protected:
     FileUtil::IOFile file;
     bool is_loaded = false;

src/core/loader/ncch.cpp

@@ -4,7 +4,9 @@
 
 #include <algorithm>
 #include <cinttypes>
+#include <codecvt>
 #include <cstring>
+#include <locale>
 #include <memory>
 #include "common/logging/log.h"
 #include "common/string_util.h"
@@ -420,4 +422,22 @@ ResultStatus AppLoader_NCCH::ReadRomFS(std::shared_ptr<FileUtil::IOFile>& romfs_
     return ResultStatus::ErrorNotUsed;
 }
 
+ResultStatus AppLoader_NCCH::ReadTitle(std::string& title) {
+    std::vector<u8> data;
+    Loader::SMDH smdh;
+    ReadIcon(data);
+
+    if (!Loader::IsValidSMDH(data)) {
+        return ResultStatus::ErrorInvalidFormat;
+    }
+
+    memcpy(&smdh, data.data(), sizeof(Loader::SMDH));
+
+    const auto& short_title = smdh.GetShortTitle(SMDH::TitleLanguage::English);
+    auto title_end = std::find(short_title.begin(), short_title.end(), u'\0');
+    title = Common::UTF16ToUTF8(std::u16string{short_title.begin(), title_end});
+
+    return ResultStatus::Success;
+}
+
 } // namespace Loader

src/core/loader/ncch.h

@@ -191,23 +191,13 @@ public:
 
     ResultStatus ReadLogo(std::vector<u8>& buffer) override;
 
-    /**
-     * Get the program id of the application
-     * @param out_program_id Reference to store program id into
-     * @return ResultStatus result of function
-     */
     ResultStatus ReadProgramId(u64& out_program_id) override;
 
-    /**
-     * Get the RomFS of the application
-     * @param romfs_file Reference to buffer to store data
-     * @param offset     Offset in the file to the RomFS
-     * @param size       Size of the RomFS in bytes
-     * @return ResultStatus result of function
-     */
     ResultStatus ReadRomFS(std::shared_ptr<FileUtil::IOFile>& romfs_file, u64& offset,
                            u64& size) override;
 
+    ResultStatus ReadTitle(std::string& title) override;
+
 private:
     /**
      * Reads an application ExeFS section of an NCCH file into AppLoader (e.g. .code, .logo, etc.)