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+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+#ifndef ANDROID_ASSET_MANAGER_H
+#define ANDROID_ASSET_MANAGER_H
+
+#include <sys/types.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct AAssetManager;
+typedef struct AAssetManager AAssetManager;
+
+struct AAssetDir;
+typedef struct AAssetDir AAssetDir;
+
+struct AAsset;
+typedef struct AAsset AAsset;
+
+/* Available modes for opening assets */
+enum {
+ AASSET_MODE_UNKNOWN = 0,
+ AASSET_MODE_RANDOM = 1,
+ AASSET_MODE_STREAMING = 2,
+ AASSET_MODE_BUFFER = 3
+};
+
+
+/**
+ * Open the named directory within the asset hierarchy. The directory can then
+ * be inspected with the AAssetDir functions. To open the top-level directory,
+ * pass in "" as the dirName.
+ *
+ * The object returned here should be freed by calling AAssetDir_close().
+ */
+AAssetDir* AAssetManager_openDir(AAssetManager* mgr, const char* dirName);
+
+/**
+ * Open an asset.
+ *
+ * The object returned here should be freed by calling AAsset_close().
+ */
+AAsset* AAssetManager_open(AAssetManager* mgr, const char* filename, int mode);
+
+/**
+ * Iterate over the files in an asset directory. A NULL string is returned
+ * when all the file names have been returned.
+ *
+ * The returned file name is suitable for passing to AAssetManager_open().
+ *
+ * The string returned here is owned by the AssetDir implementation and is not
+ * guaranteed to remain valid if any other calls are made on this AAssetDir
+ * instance.
+ */
+const char* AAssetDir_getNextFileName(AAssetDir* assetDir);
+
+/**
+ * Reset the iteration state of AAssetDir_getNextFileName() to the beginning.
+ */
+void AAssetDir_rewind(AAssetDir* assetDir);
+
+/**
+ * Close an opened AAssetDir, freeing any related resources.
+ */
+void AAssetDir_close(AAssetDir* assetDir);
+
+/**
+ * Attempt to read 'count' bytes of data from the current offset.
+ *
+ * Returns the number of bytes read, zero on EOF, or < 0 on error.
+ */
+int AAsset_read(AAsset* asset, void* buf, size_t count);
+
+/**
+ * Seek to the specified offset within the asset data. 'whence' uses the
+ * same constants as lseek()/fseek().
+ *
+ * Returns the new position on success, or (off_t) -1 on error.
+ */
+off_t AAsset_seek(AAsset* asset, off_t offset, int whence);
+
+/**
+ * Close the asset, freeing all associated resources.
+ */
+void AAsset_close(AAsset* asset);
+
+/**
+ * Get a pointer to a buffer holding the entire contents of the assset.
+ *
+ * Returns NULL on failure.
+ */
+const void* AAsset_getBuffer(AAsset* asset);
+
+/**
+ * Report the total size of the asset data.
+ */
+off_t AAsset_getLength(AAsset* asset);
+
+/**
+ * Report the total amount of asset data that can be read from the current position.
+ */
+off_t AAsset_getRemainingLength(AAsset* asset);
+
+/**
+ * Open a new file descriptor that can be used to read the asset data.
+ *
+ * Returns < 0 if direct fd access is not possible (for example, if the asset is
+ * compressed).
+ */
+int AAsset_openFileDescriptor(AAsset* asset, off_t* outStart, off_t* outLength);
+
+/**
+ * Returns whether this asset's internal buffer is allocated in ordinary RAM (i.e. not
+ * mmapped).
+ */
+int AAsset_isAllocated(AAsset* asset);
+
+
+
+#ifdef __cplusplus
+};
+#endif
+
+#endif // ANDROID_ASSET_MANAGER_H