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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#if defined(__ANDROID__)
#include <sys/types.h>
#include <unistd.h>
#include "common/str.h"
#include "common/stream.h"
#include "common/util.h"
#include "common/archive.h"
#include "common/debug.h"
#include "common/textconsole.h"
#include "backends/platform/android/jni.h"
#include "backends/platform/android/asset-archive.h"
#include <android/asset_manager.h>
#include <android/asset_manager_jni.h>
class AssetInputStream : public Common::SeekableReadStream {
public:
AssetInputStream(AAssetManager *as, const Common::String &path);
virtual ~AssetInputStream();
virtual bool eos() const { return _eos; }
virtual void clearErr() {_eos = false; }
virtual uint32 read(void *dataPtr, uint32 dataSize);
virtual int32 pos() const { return _pos; }
virtual int32 size() const { return _len; }
virtual bool seek(int32 offset, int whence = SEEK_SET);
private:
void close();
AAsset *_asset;
uint32 _pos;
uint32 _len;
bool _eos;
};
AssetInputStream::AssetInputStream(AAssetManager *as, const Common::String &path) :
_eos(false), _pos(0) {
_asset = AAssetManager_open(as, path.c_str(), AASSET_MODE_RANDOM);
_len = AAsset_getLength(_asset);
}
AssetInputStream::~AssetInputStream() {
}
void AssetInputStream::close() {
AAsset_close(_asset);
}
uint32 AssetInputStream::read(void *dataPtr, uint32 dataSize) {
uint32 readlen = AAsset_read(_asset, dataPtr, dataSize);
_pos += readlen;
if (readlen != dataSize) {
_eos = true;
}
return readlen;
}
bool AssetInputStream::seek(int32 offset, int whence) {
int res = AAsset_seek(_asset, offset, whence);
if (res == -1) {
return false;
}
if (whence == SEEK_CUR) {
_pos += offset;
} else if (whence == SEEK_SET) {
_pos = offset;
} else if (whence == SEEK_END) {
_pos = _len + offset;
}
assert(_pos <= _len);
_eos = false;
return true;
}
AndroidAssetArchive::AndroidAssetArchive(jobject am) : _hasCached(false) {
JNIEnv *env = JNI::getEnv();
_am = AAssetManager_fromJava(env, am);
}
AndroidAssetArchive::~AndroidAssetArchive() {
}
bool AndroidAssetArchive::hasFile(const Common::String &name) const {
AAsset *asset = AAssetManager_open(_am, name.c_str(), AASSET_MODE_RANDOM);
bool exists = false;
if (asset != NULL) {
exists = true;
AAsset_close(asset);
}
return exists;
}
int AndroidAssetArchive::listMembers(Common::ArchiveMemberList &member_list) const {
if (_hasCached) {
member_list.insert(member_list.end(), _cachedMembers.begin(), _cachedMembers.end());
return _cachedMembers.size();
}
int count = 0;
AAssetDir *dir = AAssetManager_openDir(_am, "");
const char *file = AAssetDir_getNextFileName(dir);
while (file) {
member_list.push_back(getMember(file));
++count;
file = AAssetDir_getNextFileName(dir);
}
AAssetDir_close(dir);
_cachedMembers = Common::ArchiveMemberList(member_list);
_hasCached = true;
return count;
}
const Common::ArchiveMemberPtr AndroidAssetArchive::getMember(const Common::String &name) const {
return Common::ArchiveMemberPtr(new Common::GenericArchiveMember(name, this));
}
Common::SeekableReadStream *AndroidAssetArchive::createReadStreamForMember(const Common::String &path) const {
if (!hasFile(path)) {
return nullptr;
}
return new AssetInputStream(_am, path);
}
#endif
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