mirror of
https://github.com/openharmony/drivers_framework.git
synced 2026-07-22 04:05:29 -04:00
zhang
140 lines
4.0 KiB
C
140 lines
4.0 KiB
C
/*
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* Copyright (c) 2021-2021 Huawei Device Co., Ltd.
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*
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* HDF is dual licensed: you can use it either under the terms of
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* the GPL, or the BSD license, at your option.
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* See the LICENSE file in the root of this repository for complete details.
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*/
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#ifndef BLOCK_BUFFER_H
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#define BLOCK_BUFFER_H
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#include <stdio.h>
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#include "hdf_slist.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct HdfBlockBuffer {
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struct HdfSList link;
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uint16_t position;
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uint16_t dataSize;
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uint8_t data[1];
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};
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struct HdfBlockBuffer *HdfBlockBufferNew(uint16_t size);
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void HdfBlockBufferFree(const struct BlockBuffer *buffer);
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uint16_t HdfBlockBufferGetDataSize(struct BlockBuffer *buffer);
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uint16_t HdfBlockBufferGetAvailableSize(struct BlockBuffer *buffer);
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uint16_t HdfBlockBufferSkipBytes(struct BlockBuffer *buffer, uint16_t bytes);
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uint8_t *HdfBlockBufferRead(struct BlockBuffer *buffer, uint16_t size);
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/*
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* @brief read a byte value from buffer and move cursor to next.
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*
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* @param[in] buff the instance of gdk buffer.
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* @param[in] ulOffset the offset from current cursor.
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*
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* @return the byte value that read from buffer.
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*/
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bool HdfBlockBufferGetc(struct BlockBuffer *buffer, uint8_t *outValue);
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/*
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* @brief read a byte value from buffer and move cursor to next.
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*
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* @param[in] buff the instance of gdk buffer.
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* @param[in] ulOffset the offset from current cursor.
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*
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* @return the byte value that read from buffer.
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*/
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bool HdfBlockBufferReadByteAt(struct BlockBuffer *buffer, uint16_t idx, uint8_t *outValue);
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/*
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* @brief read a short value from buffer and move cursor to next.
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*
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* @param[in] buff the instance of gdk buffer.
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* @param[in] ulOffset the offset from current cursor.
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*
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* @return the short value that read from buffer.
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*/
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bool HdfBlockBufferReadShort(struct BlockBuffer *buffer, uint16_t *value16);
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/*
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* @brief read a short value from buffer and move cursor to next.
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*
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* @param[in] buff the instance of gdk buffer.
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* @param[in] ulOffset the offset from current cursor.
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*
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* @return the short value that read from buffer.
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*/
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bool HdfBlockBufferReadShortAt(struct BlockBuffer *buffer, size_t idx, uint16_t *outValue);
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uint8_t *HdfBlockBufferGetData(struct BlockBuffer *buffer);
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/*
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* @brief put a short value into buffer order with big endian.
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*
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* @param[in] buff the instance of gdk buffer.
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* @param[in] short_value the short value that insert into buffer..
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*
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* @return true if uint8 was write successfully, otherwise false.
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*/
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bool HdfBlockBufferWriteShort(struct BlockBuffer *buffer, uint16_t shortValue);
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/*
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* @brief get buffer space size.
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*
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* @param[in] buff the instance of gdk buffer.
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* @param[in] start the start index of duplicate buffer rang.
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* @param[in] end the end index of duplicate buffer rang.
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*
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* @return the new instance of buff which contain specific packet.
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*/
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struct HdfBlockBuffer *HdfBlockBufferDuplicate(const struct HdfBlockBuffer *buffer, uint16_t start, uint16_t end);
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/*
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* @brief append an byte array packet into buffer.
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*
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* @param[in] buff the instance of gdk buffer.
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* @param[in] data the start address of byte array.
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* @param[in] length the length of byte array.
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*
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* @return void
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*/
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void HdfBlockBufferRewind(struct HdfBlockBuffer *buffer);
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/*
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* @brief put a byte into buffer.
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*
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* @param[in] buff -the instance of gdk buffer.
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* @param[in] value -the byte value that insert into buffer..
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*
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* @return true if uint8 was write successfully, otherwise false.
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*/
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bool HdfBlockBufferPutc(struct HdfBlockBuffer *buffer, uint8_t value);
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/*
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* @brief append an byte array packet into buffer.
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*
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* @param[in] buff the instance of gdk buffer.
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* @param[in] data the start address of byte array.
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* @param[in] length the length of byte array.
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*
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* @return true if operation is success, otherwise false.
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*/
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bool HdfBlockBufferWriteData(struct HdfBlockBuffer *buffer, uint8_t *data, size_t length);
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bool HdfBlockBufferWriteBuff(struct HdfBlockBuffer *dst, struct HdfBlockBuffer *src);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* BLOCK_BUFFER_H */
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