Add a class for accessing applications assets

[libs/core.git] / source / io / android / asset.cpp

diff --git a/source/io/android/asset.cpp b/source/io/android/asset.cpp
new file mode 100644 (file)
index 0000000..1b97eae
--- /dev/null
+++ b/source/io/android/asset.cpp
@@ -0,0 +1,66 @@
+#include <stdexcept>
+#include <msp/core/application.h>
+#include <msp/core/mainthread.h>
+#include <android/asset_manager.h>
+#include "asset.h"
+#include "file.h"
+
+using namespace std;
+
+namespace Msp {
+namespace IO {
+
+struct Asset::Private
+{
+       AAsset *asset;
+};
+
+Asset::Asset(const string &name)
+{
+       AAssetManager *asset_manager = reinterpret_cast<Android::MainThread *>(Application::get_data())->get_asset_manager();
+       AAsset *asset = AAssetManager_open(asset_manager, name.c_str(), AASSET_MODE_RANDOM);
+       if(!asset)
+               throw file_not_found(name);
+
+       priv = new Private;
+       priv->asset = asset;
+
+       mode = M_READ;
+}
+
+Asset::~Asset()
+{
+       AAsset_close(priv->asset);
+       delete priv;
+}
+
+unsigned Asset::do_read(char *buf, unsigned size)
+{
+       int ret = AAsset_read(priv->asset, buf, size);
+       if(ret<0)
+               throw runtime_error("Asset::do_read");
+       else if(ret==0)
+               set_eof();
+
+       return ret;
+}
+
+SeekOffset Asset::seek(SeekOffset off, SeekType type)
+{
+       signal_flush_required.emit();
+       off = AAsset_seek(priv->asset, off, type);
+       if(off<0)
+               throw runtime_error("Asset::seek");
+       return off;
+}
+
+SeekOffset Asset::tell() const
+{
+       SeekOffset off = AAsset_seek(priv->asset, 0, S_CUR);
+       if(off<0)
+               throw runtime_error("Asset::tell");
+       return off;
+}
+
+} // namespace IO
+} // namespace Msp