// add data from start of buffer
unsigned char* scb_push(sc_buff *scb, unsigned int len)
{
scb->data -= len;
scb->len += len;
CHECK_BOUNDRARY(scb);
return scb->data;
}
/*----------------------------------------------------------------------
* Func : mcpb_push
*
* Desc : push data to the front of mcp buffer
*
* Parm : mcpb : mcp buffer
* len : size to push
*
* Retn : new start address of mcp buffer data
*----------------------------------------------------------------------*/
unsigned char* mcpb_push(mcp_buff *mcpb, unsigned int len)
{
mcpb->data -= len;
mcpb->len += len;
CHECK_BOUNDRARY(mcpb);
return mcpb->data;
}
/*----------------------------------------------------------------------
* Func : mcpb_put
*
* Desc : put data from tail of mcp buffer
*
* Parm : mcpb : mcp buffer
* len : size to put
*
* Retn : previous buffer tail
*----------------------------------------------------------------------*/
unsigned char* mcpb_put(mcp_buff* mcpb, unsigned int len)
{
unsigned char* ptr = mcpb->tail;
mcpb->tail += len;
mcpb->len += len;
CHECK_BOUNDRARY(mcpb);
return ptr;
}
// add data from tail of buffer
unsigned char* scb_put(sc_buff* scb, unsigned int len)
{
unsigned char* ptr = scb->tail;
scb->tail += len;
scb->len += len;
CHECK_BOUNDRARY(scb);
return ptr;
}
/*----------------------------------------------------------------------
* Func : mcpb_trim
*
* Desc : remove data from tail of mcp buffer
*
* Parm : mcpb : mcp buffer
* len : size to remove
*
* Retn : N/A
*----------------------------------------------------------------------*/
void mcpb_trim(mcp_buff* mcpb, unsigned int len)
{
mcpb->tail -= len;
mcpb->len -= len;
CHECK_BOUNDRARY(mcpb);
}
/*----------------------------------------------------------------------
* Func : mcpb_reserve
*
* Desc : reserve an area in front of mcp buffer
*
* Parm : mcpb : mcp buffer
* len : size to reserve
*
* Retn : N/A
*----------------------------------------------------------------------*/
void mcpb_reserve(mcp_buff* mcpb, unsigned int len)
{
mcpb->data += len;
mcpb->tail += len;
CHECK_BOUNDRARY(mcpb);
}
// add data from tail of buffer
void scb_reserve(sc_buff* scb, unsigned int len)
{
scb->data += len;
scb->tail += len;
CHECK_BOUNDRARY(scb);
}
