--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/utils/stack.c	Tue Jun 29 12:34:26 2010 +0100
@@ -0,0 +1,168 @@
+/*
+ * stack.c
+ *
+ * Copyright(c) 1998 - 2010 Texas Instruments. All rights reserved.      
+ * All rights reserved.      
+ * 
+ * This program and the accompanying materials are made available under the 
+ * terms of the Eclipse Public License v1.0 or BSD License which accompanies
+ * this distribution. The Eclipse Public License is available at
+ * http://www.eclipse.org/legal/epl-v10.html and the BSD License is as below.                                   
+ *                                                                       
+ * Redistribution and use in source and binary forms, with or without    
+ * modification, are permitted provided that the following conditions    
+ * are met:                                                              
+ *                                                                       
+ *  * Redistributions of source code must retain the above copyright     
+ *    notice, this list of conditions and the following disclaimer.      
+ *  * Redistributions in binary form must reproduce the above copyright  
+ *    notice, this list of conditions and the following disclaimer in    
+ *    the documentation and/or other materials provided with the         
+ *    distribution.                                                      
+ *  * Neither the name Texas Instruments nor the names of its            
+ *    contributors may be used to endorse or promote products derived    
+ *    from this software without specific prior written permission.      
+ *                                                                       
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS   
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT     
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT  
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT      
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT   
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** \file stack.c
+ *  \brief Seport module API
+ *
+ *  \see stack.h
+ */
+
+/***************************************************************************/
+/*                                                                         */
+/*    MODULE:   stack.c                                                    */
+/*    PURPOSE:  Stack module implementation                                */
+/*                                                                         */
+/***************************************************************************/
+
+
+#define __FILE_ID__  FILE_ID_133
+#include "tidef.h"
+#include "osApi.h"
+#include "stack.h"
+
+
+/**
+ * \date 30-May-2006\n
+ * \brief initialize stack object
+ *
+ * Function Scope \e Public.\n
+ * \param pStack    - pointer to the Stack_t structure\n
+ * \param hOS       - handle to the OS object\n
+ * \param uElemSize - size of a one stack element\n
+ * \param uDep      - stack depth\n
+ * \param pBuf      - pointer to the stack buffer; if NULL a memory for the stack buffer will be dynamically allocated\n
+ * \param fCpy      - pointer to function copying the stack element; if NULL a default copy function will be used\n
+ * \return 0 - on success, -1 - on failure\n
+ */
+unsigned stackInit 
+(
+    Stack_t   *pStack, 
+    TI_HANDLE  hOs,
+    unsigned   uElemSize, 
+    unsigned   uDep, 
+    void      *pBuf, 
+    void     (*fCpy) (TI_HANDLE, void*, void*, unsigned)
+)
+{
+    pStack->hOs       = hOs;
+    pStack->uPtr      = 0;
+    pStack->uElemSize = uElemSize;
+    pStack->uDep      = uDep * uElemSize;
+
+    if (pBuf)
+    {
+        pStack->pBuf  = pBuf;
+        pStack->bBuf  = 0;
+    }
+
+    else
+    {
+        pStack->pBuf  = _os_memoryAlloc (hOs, pStack->uDep);
+        pStack->bBuf  = TI_TRUE;
+    }
+
+    if (fCpy)
+        pStack->fCpy  = fCpy;
+    else
+        pStack->fCpy  = os_memoryCopy; 
+
+    return 0; 
+}
+
+
+/**
+ * \date 30-May-2006\n
+ * \brief destroy stack object
+ *
+ * Function Scope \e Public.\n
+ * \param pStack    - pointer to the Stack_t structure\n
+ * \return 0 - on success, -1 - on failure\n
+ */
+unsigned stackDestroy (Stack_t *pStack)
+{
+    if (pStack->bBuf)
+        _os_memoryFree (pStack->hOs, pStack->pBuf, pStack->uDep);
+
+    return 0;
+}
+
+
+/**
+ * \date 30-May-2006\n
+ * \brief destroy stack object
+ *
+ * Function Scope \e Public.\n
+ * \param pStack    - pointer to the Stack_t structure\n
+ * \param pVal      - the pointer to the pushed value\n
+ * \return 0 - on success, -1 - on failure\n
+ */
+unsigned stackPush (Stack_t *pStack, void *pVal)
+{
+    if (pStack->uPtr < pStack->uDep)
+    {
+        pStack->fCpy (pStack->hOs, (unsigned char*)pStack->pBuf + pStack->uPtr, pVal, pStack->uElemSize);
+        pStack->uPtr += pStack->uElemSize;
+
+        return 0;
+    }
+
+    return -1;
+}
+
+
+/**
+ * \date 30-May-2006\n
+ * \brief destroy stack object
+ *
+ * Function Scope \e Public.\n
+ * \param pStack    - pointer to the Stack_t structure\n
+ * \param pVal      - the pointer to the popped value\n
+ * \return 0 - on success, -1 - on failure\n
+ */
+unsigned stackPop (Stack_t *pStack, void *pVal)
+{
+    if (pStack->uPtr > 0)
+    {
+        pStack->uPtr -= pStack->uElemSize;
+        pStack->fCpy (pStack->hOs, pVal, (unsigned char*)pStack->pBuf + pStack->uPtr, pStack->uElemSize);
+
+        return 0;
+    }
+
+    return -1;
+}