147 lines
3.9 KiB
C
147 lines
3.9 KiB
C
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#ifndef __EC_RING_H__
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#define __EC_RING_H__
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#include "commontypedef.h"
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typedef struct _ecRingT
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{
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UINT8 * pDataBuff;
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INT32 idataCnt;
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INT32 iBuffSize;
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INT32 iPosRead;
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INT32 iPosWrite;
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INT32 iPosPreread;
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} ecRingT;
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typedef enum _EC_RING_OPTION_E
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{
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E_LRO_BUFF_SIZE,
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E_LRO_BUFF_FILL_SIZE,
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E_LRO_FREE_SIZE,
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E_LRO_DATA_SIZE,
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E_LRO_NEXT_READ_SIZE,
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E_LRO_NEXT_WRITE_SIZE,
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E_LRO_INVALID =0xFF
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} EC_RING_OPTION_E;
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/*
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* Description:
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* Create a ring buffer for <data_size> characters.
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* Param: iBuffSize, the size of buffer;
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* Return: ring descriptor or NULL in case of error;
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* Note: NONE
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*/
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ecRingT * pxEcRingCreate(INT32 iBuffSize);
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/*
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* Description:
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* Get characters from ring buffer(but not clear data).
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* Param: pDstRing, ring descriptor;
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* Param: pDataBuff, the pointer of buffer;
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* Param: i_data_len, the size of buffer;
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* Return: i_len_read, the length of data has been read;
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* Note: NONE
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*/
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INT32 xEcRingPreread(ecRingT * pDstRing, UINT8 * pDataBuff, INT32 iBuffSize);
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/*
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* Description:
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* Get characters from ring buffer.
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* Param: pDstRing, ring descriptor;
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* Param: pDataBuff, the pointer of buffer;
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* Param: i_data_len, the size of buffer;
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* Return: i_len_read, the length of data has been read;
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* Note: NONE
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*/
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INT32 xEcRingRead(ecRingT * pDstRing, UINT8 * pDataBuff, INT32 iBuffSize);
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/*
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* Description:
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* Put characters into ring buffer.
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* Param: pDstRing, ring descriptor;
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* Param: pDataBuff, the pointer of buffer;
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* Param: i_data_len, length of data;
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* Return: i_len_write, the length of data has been written;
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* Note: NONE
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*/
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INT32 xEcRingWrite(ecRingT * pDstRing, UINT8 * pDataBuff, INT32 iDataLen);
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/*
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* Description:
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* Put characters into ring buffer.
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* Param: pDstRing, ring descriptor;
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* Param: pDataBuff, the pointer of buffer;
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* Param: i_data_len, length of data;
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* Return: i_len_write, the length of data has been written;
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* Note: NONE
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*/
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INT32 xEcRingWriteEx(ecRingT * pDstRing, UINT8 * pDataBuff, INT32 iDataLen);
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/*
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* Description:
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* Get a character from ring buffer.
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* Param: pDstRing, ring descriptor;
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* Param: pCharBuff, a buffer for saving character;
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* Return: i_len_read, 0, fail;1, success.
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* Note: NONE
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*/
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INT32 xEcRingReadChar(ecRingT * pDstRing, UINT8 * pCharBuff);
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/*
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* Description:
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* Put a character into ring buffer.
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* Param: pDstRing, ring descriptor;
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* Param: uCharValue, a character;
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* Return: i_len_write, 0, fail;1, success.
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* Note: NONE
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*/
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INT32 xEcRingWriteChar(ecRingT * pDstRing, UINT8 uCharValue);
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/*
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* Description:
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* Get a character from ring buffer(but not clear data).
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* Param: pDstRing, ring descriptor;
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* Param: pCharBuff, a buffer for saving character;
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* Return: i_len_read, 0, fail;1, success.
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* Note: NONE
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*/
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INT32 xEcRingPrereadGetFirstChar(ecRingT * pDstRing, UINT8 * pCharBuff);
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/*
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* Description:
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* Get a character from ring buffer(but not clear data).
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* Param: pDstRing, ring descriptor;
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* Param: pCharBuff, a buffer for saving character;
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* Return: i_len_read, 0, fail;1, success.
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* Note: ec_ring_preread_getfirstchar should be called and return 1.
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*/
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INT32 xEcRingPrereadGetNextChar(ecRingT * pDstRing, UINT8 * pCharBuff);
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/*
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* Description:
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* Get information according to the type.
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* Param: pDstRing, ring descriptor;
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* Param: iOptType, the specified type;
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* Return: i_ret_value, the length/size of the type.
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* Note: None
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*/
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INT32 xEcRingGetOption(ecRingT * pDstRing, INT32 iOptType);
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/*
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* Description:
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* Deletes all read elements from the buffer.
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* Param: pDstRing, ring descriptor;
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* Return: NONE;
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* Note: NONE
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*/
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void xEcRingClear(ecRingT * pDstRing);
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/*
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* Description:
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* Deletes a ring buffer and then set ring descriptor to NULL.
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* Param: pDstRing, pointer to a ring descriptor;
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* Return: NONE;
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* Note: NONE
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*/
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void xEcRingDelete(ecRingT * pDstRing);
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#endif /* __EC_RING_H__ */
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