/****************************************************************
FunctionName : GAgent_Local_RecAll
Description : receive all of data form local io one time.
and put data int local cycle buf.This func will
change data 0xff55 isn't SYNC HEAD to 0xff
pgc : gagent global struct.
return : void.
****************************************************************/
int32 GAgent_Local_RecAll(pgcontext pgc)
{
int32 fd;
int32 available_len =0;
int32 read_count = 0;
uint32 offRec;
fd = pgc->rtinfo.local.uart_fd;
if(fd < 0)
{
return RET_FAILED;
}
if(RET_SUCCESS == GAgent_Local_IsDataValid(pgc))
{
/* step 1.read data into loopbuf */
available_len = get_available_buf_space( pos_current, pos_start );
read_count = serial_read( fd, &hal_RxBuffer[pos_current & HAL_BUF_MASK],available_len );
offRec = pos_current;
if(read_count <= 0)
{
return read_count;
}
pos_current += read_count;
/* step 2. transfer 0xff55 to 0xff */
hal_decode_data(offRec, read_count);
read_count = get_data_len(offRec, pos_current);
}
return read_count;
}
/****************************************************************
FunctionName : find_packet_backward
Description : 在串口缓冲区中，从指定位置往回查找包含该数据的一帧数据，
并返回帧头所在偏移。没有完整一帧数据则返回已接收数据的起始位置。
pos : 指定位置.
return : 帧头所在偏移
Add by will --2015-05-21
****************************************************************/
static int32 find_packet_backward(uint32 pos)
{
uint32 offset;
uint8 data1;
uint8 data2;
uint32 datalen;
uint16 packetlen;
// 缓冲区中已知数据长度
datalen = get_data_len(pos_start, pos);
if(datalen < MCU_SYNC_HEAD_LEN)
{
return pos_start;
}
if(datalen <= MCU_SYNC_HEAD_LEN + sizeof(packetlen))
{
return pos_start;
}
offset = pos - MCU_SYNC_HEAD_LEN;
while(offset != pos_start)
{
data1 = __halbuf_read(offset);
data2 = __halbuf_read(offset + 1);
if(MCU_HDR_FF == data1 && MCU_HDR_FF == data2)
{
datalen = get_data_len(offset, pos + 1);
packetlen = __halbuf_read(offset + MCU_LEN_POS);
packetlen = (packetlen << 8) | __halbuf_read(offset + MCU_LEN_POS + 1);
packetlen += MCU_SYNC_HEAD_LEN + sizeof(packetlen);
if(datalen <= packetlen)
{
return offset;
}
else
{
return offset + packetlen;
}
break;
}
offset--;
}
return pos_start;
}
// 向前（左）移动数据，被移动的数据为从p_start_pos开始，到p_end_pos，移动长度为move_len
void move_data_backward( uint8 *buf, int32 pos_start, int32 pos_end, int32 move_len)
{
int32 k;
int32 pos_new_start;
int32 move_data_len = get_data_len(pos_start, pos_end);
pos_new_start = pos_start + (-1)*move_len;
for(k=0; k < move_data_len; k++)
{
__halbuf_write(pos_new_start + k, __halbuf_read(pos_start + k));
}
}
ValueBuffer*
UnqliteCursor::get_data(
bool as_binary,
sxi64 value_len,
pyunqlite::UserCallback* callback,
pyunqlite::ValueBuffer* direct_buffer
)
{
ValueBuffer* value = 0;
// setup the buffer for retrieving data
if (direct_buffer) {
if (value_len < 0)
value_len = direct_buffer->get_data_len();
else if (direct_buffer->get_data_len() < value_len)
throw UnqliteException(UNQLITE_INVALID);
value = new ValueBuffer(*direct_buffer);
}
else if (!callback) {
// determine the size of the stored data if it is unknown
if (value_len < 0)
value_len = get_data_len();
// create a new buffer
value = new ValueBuffer(as_binary, value_len);
if (!value)
throw UnqliteException(UNQLITE_NOMEM);
}
int rc;
if (callback) {
rc = unqlite_kv_cursor_data_callback(
this->_cursor,
callback->get_unqlite_callback_function(),
callback->get_unqlite_callback_data()
);
}
else {
rc = unqlite_kv_cursor_data(this->_cursor, value->get_data(), &value_len);
}
if (callback && (rc == UNQLITE_ABORT))
callback->process_exception();
else if (rc != UNQLITE_OK)
throw UnqliteException(rc, this->_db);
return value;
}
/****************************************************************
FunctionName : find_packet_forward
Description : 在串口缓冲区中，从指定位置往前查找最近一帧完整数据，
返回该帧数据头所在位置。
pos : 指定位置.
packetLen : 输出参数，该帧数据的长度
return : 失败--RET_FAILED
成功--帧头所在偏移
Add by will --2015-05-21
****************************************************************/
static int32 find_packet_forward(uint32 pos, uint16 *packetLen)
{
uint8 data1;
uint8 data2;
uint32 datalen;
uint16 packetlen;
uint16 packetLenMin;
uint32 start, end;
start = pos;
end = pos_current;
datalen = get_data_len(start, end);
/* A packet len must larger than the member sync head + len */
packetLenMin = MCU_SYNC_HEAD_LEN + sizeof(packetlen);
while( datalen > packetLenMin )
{
data1 = __halbuf_read(start);
data2 = __halbuf_read(start + 1);
if(MCU_HDR_FF == data1 && MCU_HDR_FF == data2)
{
packetlen = __halbuf_read(start + MCU_LEN_POS);
packetlen = (packetlen << 8) | __halbuf_read(start + MCU_LEN_POS + 1);
packetlen += 4;
if(datalen < packetlen)
{
return RET_FAILED;
}
else
{
*packetLen = packetlen;
return start;
}
}
start++;
datalen--;
}
return RET_FAILED;
}
int32 check_isInPacket(uint32 pos)
{
uint32 packetStart;
uint8 data1, data2;
uint32 datalen;
uint32 packetLen;
packetStart = find_packet_backward(pos);
data1 = __halbuf_read(packetStart);
data2 = __halbuf_read(packetStart + 1);
if(MCU_HDR_FF == data1 && MCU_HDR_FF == data2)
{
datalen = get_data_len(packetStart, pos) + 1;
if(datalen <= MCU_SYNC_HEAD_LEN + sizeof(uint16))
{
return 0;
}
packetLen = __halbuf_read(packetStart + MCU_LEN_POS);
packetLen = (packetLen << 8) | __halbuf_read(packetStart + MCU_LEN_POS + 1);
packetLen += MCU_SYNC_HEAD_LEN + sizeof(uint16);
if(datalen > packetLen)
{
return 0;
}
else
{
return 1;
}
}
else
{
return 0;
}
}
data *alloc_data(char *s)
{
int len = strlen(s);
data *ret = malloc(sizeof(data));
int data_len = get_data_len(len);
int i;
ret->len = len;
ret->l_len = data_len;
ret->l1 = malloc(sizeof(long long) * data_len);
ret->l2 = malloc(sizeof(long long) * data_len);
memset(ret->l1, 0, sizeof(long long) * data_len);
memset(ret->l2, 0, sizeof(long long) * data_len);
char *head = &s[0], *tail = &s[len - 1];
char *l1 = (char *)ret->l1;
char *l2 = (char *)ret->l2;
int j;
l1 += 7;
l2 += 7;
for (i = 0, j = 0; i < len; i++, j++) {
if (j == 8) {
j = 0;
l1 += 15;
l2 += 15;
}
*l1 = *head;
*l2 = *tail;
++head;
--tail;
--l1;
--l2;
}
return ret;
}
/****************************************************************
FunctionName : Local_decode_data
Description : decode local data in local cycle buf.transfer 0xff55 to 0xff.
start : the posation in local cycle buf where will be decode
length : decode data length
will change the global pointer "put"--pos_current
****************************************************************/
void hal_decode_data(uint32 start, uint32 length)
{
static uint8 isSyncHead = 0;
uint8 data;
uint32 i;
uint32 offRec;
uint32 invalidLen;
int32 ret;
if(0 == length)
{
return ;
}
offRec = start;
for(i = 0; i < length; i++)
{
data = __halbuf_read(offRec);
if(isSyncHead)
{
isSyncHead = 0;
/* check if is a new packet */
if(0xFF == data)
{
/* check if pre byte is in one packet */
ret = check_isInPacket(offRec - 1);
if(0 == ret)
{ /* new packet */
offRec++;
continue;
}
else
{
ret = find_packet_backward(offRec);
invalidLen = get_data_len(ret, offRec + 1);
move_data_backward(hal_RxBuffer, offRec + 1, pos_current, invalidLen);
offRec -= invalidLen;
pos_current = pos_current - invalidLen;
}
}
/* check if is 0xff 0x55 */
else if(0x55 == data)
{
if((offRec & HAL_BUF_MASK) == ((pos_current - 1) & HAL_BUF_MASK))
{
/* the last byte has received */
__halbuf_write(offRec, 0x00);
}
else
{
move_data_backward(hal_RxBuffer, offRec + 1, pos_current, 1);
}
offRec -= 1;
pos_current -= 1;
}
/* invalid packet */
else
{
/* 找到当前字节处于哪一个packet */
ret = find_packet_backward(offRec);
invalidLen = get_data_len(ret, offRec + 1);
move_data_backward(hal_RxBuffer, offRec + 1, pos_current, invalidLen);
offRec -= invalidLen;
pos_current = pos_current - invalidLen;
}
}
else if(MCU_HDR_FF == data)
{
isSyncHead = 1;
}
offRec++;
}
}