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author | Mike Lockwood <lockwood@google.com> | 2013-10-03 10:30:18 -0700 |
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committer | Mike Lockwood <lockwood@google.com> | 2013-10-03 10:30:18 -0700 |
commit | 84b6292c33d71b5739828d08aa8101d1954577f2 (patch) | |
tree | d39f8bbaf0f20fa086038741e117278bb67ba1b2 /include/androidfw/CursorWindow.h | |
parent | 92a6f3018ace5aa2d5ea74e7d378b6960b5e053e (diff) | |
download | frameworks_base-84b6292c33d71b5739828d08aa8101d1954577f2.zip frameworks_base-84b6292c33d71b5739828d08aa8101d1954577f2.tar.gz frameworks_base-84b6292c33d71b5739828d08aa8101d1954577f2.tar.bz2 |
move libandroidfw to frameworks/native
Change-Id: Ic5b8a2742c7141156ab0f00ca29097bfe92bce60
Diffstat (limited to 'include/androidfw/CursorWindow.h')
-rw-r--r-- | include/androidfw/CursorWindow.h | 193 |
1 files changed, 0 insertions, 193 deletions
diff --git a/include/androidfw/CursorWindow.h b/include/androidfw/CursorWindow.h deleted file mode 100644 index 8a2979a..0000000 --- a/include/androidfw/CursorWindow.h +++ /dev/null @@ -1,193 +0,0 @@ -/* - * Copyright (C) 2006 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__DATABASE_WINDOW_H -#define _ANDROID__DATABASE_WINDOW_H - -#include <cutils/log.h> -#include <stddef.h> -#include <stdint.h> - -#include <binder/Parcel.h> -#include <utils/String8.h> - -#if LOG_NDEBUG - -#define IF_LOG_WINDOW() if (false) -#define LOG_WINDOW(...) - -#else - -#define IF_LOG_WINDOW() IF_ALOG(LOG_DEBUG, "CursorWindow") -#define LOG_WINDOW(...) ALOG(LOG_DEBUG, "CursorWindow", __VA_ARGS__) - -#endif - -namespace android { - -/** - * This class stores a set of rows from a database in a buffer. The begining of the - * window has first chunk of RowSlots, which are offsets to the row directory, followed by - * an offset to the next chunk in a linked-list of additional chunk of RowSlots in case - * the pre-allocated chunk isn't big enough to refer to all rows. Each row directory has a - * FieldSlot per column, which has the size, offset, and type of the data for that field. - * Note that the data types come from sqlite3.h. - * - * Strings are stored in UTF-8. - */ -class CursorWindow { - CursorWindow(const String8& name, int ashmemFd, - void* data, size_t size, bool readOnly); - -public: - /* Field types. */ - enum { - FIELD_TYPE_NULL = 0, - FIELD_TYPE_INTEGER = 1, - FIELD_TYPE_FLOAT = 2, - FIELD_TYPE_STRING = 3, - FIELD_TYPE_BLOB = 4, - }; - - /* Opaque type that describes a field slot. */ - struct FieldSlot { - private: - int32_t type; - union { - double d; - int64_t l; - struct { - uint32_t offset; - uint32_t size; - } buffer; - } data; - - friend class CursorWindow; - } __attribute((packed)); - - ~CursorWindow(); - - static status_t create(const String8& name, size_t size, CursorWindow** outCursorWindow); - static status_t createFromParcel(Parcel* parcel, CursorWindow** outCursorWindow); - - status_t writeToParcel(Parcel* parcel); - - inline String8 name() { return mName; } - inline size_t size() { return mSize; } - inline size_t freeSpace() { return mSize - mHeader->freeOffset; } - inline uint32_t getNumRows() { return mHeader->numRows; } - inline uint32_t getNumColumns() { return mHeader->numColumns; } - - status_t clear(); - status_t setNumColumns(uint32_t numColumns); - - /** - * Allocate a row slot and its directory. - * The row is initialized will null entries for each field. - */ - status_t allocRow(); - status_t freeLastRow(); - - status_t putBlob(uint32_t row, uint32_t column, const void* value, size_t size); - status_t putString(uint32_t row, uint32_t column, const char* value, size_t sizeIncludingNull); - status_t putLong(uint32_t row, uint32_t column, int64_t value); - status_t putDouble(uint32_t row, uint32_t column, double value); - status_t putNull(uint32_t row, uint32_t column); - - /** - * Gets the field slot at the specified row and column. - * Returns null if the requested row or column is not in the window. - */ - FieldSlot* getFieldSlot(uint32_t row, uint32_t column); - - inline int32_t getFieldSlotType(FieldSlot* fieldSlot) { - return fieldSlot->type; - } - - inline int64_t getFieldSlotValueLong(FieldSlot* fieldSlot) { - return fieldSlot->data.l; - } - - inline double getFieldSlotValueDouble(FieldSlot* fieldSlot) { - return fieldSlot->data.d; - } - - inline const char* getFieldSlotValueString(FieldSlot* fieldSlot, - size_t* outSizeIncludingNull) { - *outSizeIncludingNull = fieldSlot->data.buffer.size; - return static_cast<char*>(offsetToPtr(fieldSlot->data.buffer.offset)); - } - - inline const void* getFieldSlotValueBlob(FieldSlot* fieldSlot, size_t* outSize) { - *outSize = fieldSlot->data.buffer.size; - return offsetToPtr(fieldSlot->data.buffer.offset); - } - -private: - static const size_t ROW_SLOT_CHUNK_NUM_ROWS = 100; - - struct Header { - // Offset of the lowest unused byte in the window. - uint32_t freeOffset; - - // Offset of the first row slot chunk. - uint32_t firstChunkOffset; - - uint32_t numRows; - uint32_t numColumns; - }; - - struct RowSlot { - uint32_t offset; - }; - - struct RowSlotChunk { - RowSlot slots[ROW_SLOT_CHUNK_NUM_ROWS]; - uint32_t nextChunkOffset; - }; - - String8 mName; - int mAshmemFd; - void* mData; - size_t mSize; - bool mReadOnly; - Header* mHeader; - - inline void* offsetToPtr(uint32_t offset) { - return static_cast<uint8_t*>(mData) + offset; - } - - inline uint32_t offsetFromPtr(void* ptr) { - return static_cast<uint8_t*>(ptr) - static_cast<uint8_t*>(mData); - } - - /** - * Allocate a portion of the window. Returns the offset - * of the allocation, or 0 if there isn't enough space. - * If aligned is true, the allocation gets 4 byte alignment. - */ - uint32_t alloc(size_t size, bool aligned = false); - - RowSlot* getRowSlot(uint32_t row); - RowSlot* allocRowSlot(); - - status_t putBlobOrString(uint32_t row, uint32_t column, - const void* value, size_t size, int32_t type); -}; - -}; // namespace android - -#endif |