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/*
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* Copyright (c) 2010, Mentor Graphics Corporation
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of the <ORGANIZATION> nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <openmcapi.h>
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/*************************************************************************
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*
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* FUNCTION
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*
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* mcapi_encode_handle
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*
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* DESCRIPTION
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*
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* Encodes a handle using the index of the respective node and
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* endpoint.
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*
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* INPUTS
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*
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* node_idx The index into the global data structure
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* of the node to which the handle applies.
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* endp_idx The index into the node's endpoint list
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* to which the handle applies.
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*
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* OUTPUTS
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*
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* The 32-bit encoded handle.
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*
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*************************************************************************/
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mcapi_endpoint_t mcapi_encode_handle(mcapi_uint16_t node_idx,
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mcapi_uint16_t endp_idx)
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{
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mcapi_endpoint_t handle;
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/* Put the node index in the handle. */
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handle = node_idx;
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/* Move the node ID left 16-bits. */
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handle <<= 16;
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/* Add the endpoint index to the lower 16-bits of the handle. */
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handle |= endp_idx;
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return (handle);
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}
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/*************************************************************************
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*
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* FUNCTION
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*
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* mcapi_decode_handle
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*
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* DESCRIPTION
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*
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* Decodes a handle to retrieve the index of the respective node and
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* endpoint.
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*
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* INPUTS
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*
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* handle The encoded handle.
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* *node_idx A pointer to memory that will hold the
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* decoded node index into the global data
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* structure.
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* *endp_idx A pointer to memory that will hold the
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* decoded endpoint index into the endpoint
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* list of the respective node.
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*
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* OUTPUTS
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*
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* None.
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*
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*************************************************************************/
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void mcapi_decode_handle(mcapi_endpoint_t handle, int *node_idx, int *endp_idx)
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{
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/* Extract the high 16-bits by chopping off the low 16-bits and moving
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* the remaining data over 16-bits.
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*/
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*node_idx = (handle & 0xffff0000) >> 16;
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/* Extract the low 16-bits by chopping off the high 16-bits. */
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*endp_idx = (handle & 0x0000ffff);
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}
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