Diff: scmRTOS/Common/usrlib.cpp

Revision:

0:a405220cf420

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scmRTOS/Common/usrlib.cpp	Thu Sep 09 21:19:01 2010 +0000
@@ -0,0 +1,140 @@
+//******************************************************************************
+//*
+//*     FULLNAME:  Single-Chip Microcontroller Real-Time Operating System
+//*
+//*     NICKNAME:  scmRTOS
+//*               
+//*     PURPOSE:  User Suport Library Source
+//*               
+//*     Version: 3.10
+//*
+//*     $Revision: 256 $
+//*     $Date:: 2010-01-22 #$
+//*
+//*     Copyright (c) 2003-2010, Harry E. Zhurov
+//*
+//*     Permission is hereby granted, free of charge, to any person 
+//*     obtaining  a copy of this software and associated documentation 
+//*     files (the "Software"), to deal in the Software without restriction, 
+//*     including without limitation the rights to use, copy, modify, merge, 
+//*     publish, distribute, sublicense, and/or sell copies of the Software, 
+//*     and to permit persons to whom the Software is furnished to do so, 
+//*     subject to the following conditions:
+//*
+//*     The above copyright notice and this permission notice shall be included 
+//*     in all copies or substantial portions of the Software.
+//*
+//*     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
+//*     EXPRESS  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
+//*     MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 
+//*     IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY 
+//*     CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 
+//*     TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH 
+//*     THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//*
+//*     =================================================================
+//*     See http://scmrtos.sourceforge.net for documentation, latest
+//*     information, license and contact details.
+//*     =================================================================
+//*
+//******************************************************************************
+
+#include <usrlib.h>
+#include <commdefs.h>
+
+using namespace usr;
+
+//------------------------------------------------------------------------------
+//
+///   Circular buffer function-member description
+//
+//
+//
+TCbuf::TCbuf(byte* const Address, const byte Size) :
+        buf(Address),
+        size(Size),
+        count(0),
+        first(0),
+        last(0)
+{
+}
+//------------------------------------------------------------------------------
+bool TCbuf::write(const byte* data, const byte Count)
+{
+    if( Count > (size - count) )
+        return false;
+
+    for(byte i = 0; i < Count; i++)
+        push(*(data++));
+
+    return true;
+}
+//------------------------------------------------------------------------------
+void TCbuf::read(byte* data, const byte Count)
+{
+    byte N = Count <= count ? Count : count;
+
+    for(byte i = 0; i < N; i++)
+        data[i] = pop();
+}
+//------------------------------------------------------------------------------
+byte TCbuf::get_byte(const byte index) const
+{
+    byte x = first + index;
+
+    if(x < size)
+        return buf[x];
+    else
+        return buf[x - size];
+}
+
+//------------------------------------------------------------------------------
+bool TCbuf::put(const byte item)
+{
+    if(count == size)
+        return false;
+
+    push(item);
+    return true;
+}
+//------------------------------------------------------------------------------
+byte TCbuf::get()
+{
+    if(count)
+        return pop();
+    else
+        return 0;
+}
+//------------------------------------------------------------------------------
+//
+/// \note
+/// For internal purposes.
+/// Use this function with care - it doesn't perform free size check.
+//
+void TCbuf::push(const byte item)
+{
+    buf[last] = item;
+    last++;
+    count++;
+
+    if(last == size)
+        last = 0;
+}
+//------------------------------------------------------------------------------
+//
+/// \note
+/// For internal purposes.
+/// Use this function with care - it doesn't perform free size check.
+//
+byte TCbuf::pop()
+{
+    byte item = buf[first];
+
+    count--;
+    first++;
+    if(first == size)
+        first = 0;
+
+    return item;
+}
+//------------------------------------------------------------------------------