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Diffstat (limited to 'core/jni/CursorWindow.h')
| -rw-r--r-- | core/jni/CursorWindow.h | 202 |
1 files changed, 0 insertions, 202 deletions
diff --git a/core/jni/CursorWindow.h b/core/jni/CursorWindow.h deleted file mode 100644 index 3fcb560..0000000 --- a/core/jni/CursorWindow.h +++ /dev/null @@ -1,202 +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/IMemory.h> -#include <utils/RefBase.h> - -#include <jni.h> - -#define DEFAULT_WINDOW_SIZE 4096 -#define MAX_WINDOW_SIZE (1024 * 1024) -#define WINDOW_ALLOCATION_SIZE 4096 - -#define ROW_SLOT_CHUNK_NUM_ROWS 16 - -// Row slots are allocated in chunks of ROW_SLOT_CHUNK_NUM_ROWS, -// with an offset after the rows that points to the next chunk -#define ROW_SLOT_CHUNK_SIZE ((ROW_SLOT_CHUNK_NUM_ROWS * sizeof(row_slot_t)) + sizeof(uint32_t)) - - -#if LOG_NDEBUG - -#define IF_LOG_WINDOW() if (false) -#define LOG_WINDOW(...) - -#else - -#define IF_LOG_WINDOW() IF_LOG(LOG_DEBUG, "CursorWindow") -#define LOG_WINDOW(...) LOG(LOG_DEBUG, "CursorWindow", __VA_ARGS__) - -#endif - - -// When defined to true strings are stored as UTF8, otherwise they're UTF16 -#define WINDOW_STORAGE_UTF8 1 - -// When defined to true numberic values are stored inline in the field_slot_t, otherwise they're allocated in the window -#define WINDOW_STORAGE_INLINE_NUMERICS 1 - -namespace android { - -typedef struct -{ - uint32_t numRows; - uint32_t numColumns; -} window_header_t; - -typedef struct -{ - uint32_t offset; -} row_slot_t; - -typedef struct -{ - uint8_t type; - union { - double d; - int64_t l; - struct { - uint32_t offset; - uint32_t size; - } buffer; - } data; -} __attribute__((packed)) field_slot_t; - -#define FIELD_TYPE_INTEGER 1 -#define FIELD_TYPE_FLOAT 2 -#define FIELD_TYPE_STRING 3 -#define FIELD_TYPE_BLOB 4 -#define FIELD_TYPE_NULL 5 - -/** - * This class stores a set of rows from a database in a buffer. The begining of the - * window has first chunk of row_slot_ts, which are offsets to the row directory, followed by - * an offset to the next chunk in a linked-list of additional chunk of row_slot_ts in case - * the pre-allocated chunk isn't big enough to refer to all rows. Each row directory has a - * field_slot_t per column, which has the size, offset, and type of the data for that field. - * Note that the data types come from sqlite3.h. - */ -class CursorWindow -{ -public: - CursorWindow(size_t maxSize); - CursorWindow(){} - bool setMemory(const sp<IMemory>&); - ~CursorWindow(); - - bool initBuffer(bool localOnly); - sp<IMemory> getMemory() {return mMemory;} - - size_t size() {return mSize;} - uint8_t * data() {return mData;} - uint32_t getNumRows() {return mHeader->numRows;} - uint32_t getNumColumns() {return mHeader->numColumns;} - void freeLastRow() { - if (mHeader->numRows > 0) { - mHeader->numRows--; - } - } - bool setNumColumns(uint32_t numColumns) - { - uint32_t cur = mHeader->numColumns; - if (cur > 0 && cur != numColumns) { - LOGE("Trying to go from %d columns to %d", cur, numColumns); - return false; - } - mHeader->numColumns = numColumns; - return true; - } - - int32_t freeSpace(); - - void clear(); - - /** - * Allocate a row slot and its directory. The returned - * pointer points to the begining of the row's directory - * or NULL if there wasn't room. The directory is - * initialied with NULL entries for each field. - */ - field_slot_t * allocRow(); - - /** - * 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); - - uint32_t read_field_slot(int row, int column, field_slot_t * slot); - - /** - * Copy data into the window at the given offset. - */ - void copyIn(uint32_t offset, uint8_t const * data, size_t size); - void copyIn(uint32_t offset, int64_t data); - void copyIn(uint32_t offset, double data); - - void copyOut(uint32_t offset, uint8_t * data, size_t size); - int64_t copyOutLong(uint32_t offset); - double copyOutDouble(uint32_t offset); - - bool putLong(unsigned int row, unsigned int col, int64_t value); - bool putDouble(unsigned int row, unsigned int col, double value); - bool putNull(unsigned int row, unsigned int col); - - bool getLong(unsigned int row, unsigned int col, int64_t * valueOut); - bool getDouble(unsigned int row, unsigned int col, double * valueOut); - bool getNull(unsigned int row, unsigned int col, bool * valueOut); - - uint8_t * offsetToPtr(uint32_t offset) {return mData + offset;} - - row_slot_t * allocRowSlot(); - - row_slot_t * getRowSlot(int row); - - /** - * return NULL if Failed to find rowSlot or - * Invalid rowSlot - */ - field_slot_t * getFieldSlotWithCheck(int row, int column); - field_slot_t * getFieldSlot(int row, int column) - { - int fieldDirOffset = getRowSlot(row)->offset; - return ((field_slot_t *)offsetToPtr(fieldDirOffset)) + column; - } - -private: - uint8_t * mData; - size_t mSize; - size_t mMaxSize; - window_header_t * mHeader; - sp<IMemory> mMemory; - - /** - * Offset of the lowest unused data byte in the array. - */ - uint32_t mFreeOffset; -}; - -}; // namespace android - -#endif |