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/*
* Copyright (C) 2010-2011 Mamadou Diop.
*
* Contact: Mamadou Diop <diopmamadou(at)doubango[dot]org>
*
* This file is part of Open Source Doubango Framework.
*
* DOUBANGO is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* DOUBANGO is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with DOUBANGO.
*
*/
/**@file tcomp_udvm.statemanagment.c
* @brief SigComp UDVM machine (State managment)
*
* @author Mamadou Diop <diopmamadou(at)yahoo.fr>
*
*/
#include "tcomp_udvm.h"
int tcomp_udvm_byteCopy_TempStates(tcomp_udvm_t *udvm)
{
int ok = 1;
uint8_t i;
uint8_t tocreate_size = tcomp_result_getTempStatesToCreateSize(udvm->lpResult);
uint8_t tofree_size = tcomp_result_getTempStatesToFreeSize(udvm->lpResult);
/*
* State Create
*/
for(i = 0; i < tocreate_size && ok; i++)
{
/*
* The UDVM byte copies a string of state_length bytes from the UDVM
* memory beginning at state_address (obeying the rules of Section 8.4).
* This is the state_value.
*/
tcomp_state_t* lpState = udvm->lpResult->statesToCreate[i];
if(lpState->length){
tcomp_buffer_allocBuff(lpState->value, lpState->length);
}
ok &= tcomp_udvm_bytecopy_from(udvm, tcomp_buffer_getBuffer(lpState->value), lpState->address, lpState->length);
}
/*
* State Free
*/
for(i = 0; i<tofree_size && ok; i++){
tcomp_tempstate_to_free_t *lpDesc = udvm->lpResult->statesToFree[i];
tcomp_buffer_allocBuff(lpDesc->identifier, lpDesc->partial_identifier_length);
ok &= tcomp_udvm_bytecopy_from(udvm, tcomp_buffer_getBuffer(lpDesc->identifier), lpDesc->partial_identifier_start, lpDesc->partial_identifier_length);
}
return ok;
}
////////////////////////////////////////////////////////////////////////////////////////////////////
///
/// @brief Creates temporary state.
///
/// @param [in,out] udvm If non-null, the udvm.
/// @param state_length Length of the state.
/// @param state_address The state address.
/// @param state_instruction The state instruction.
/// @param minimum_access_length Length of the minimum access.
/// @param state_retention_priority The state retention priority.
/// @param end_msg Message describing the end.
///
/// @return 1 if succeed an zero otherwise.
////////////////////////////////////////////////////////////////////////////////////////////////////
int tcomp_udvm_createTempState(tcomp_udvm_t *udvm, uint32_t state_length, uint32_t state_address, uint32_t state_instruction,
uint32_t minimum_access_length, uint32_t state_retention_priority, int end_msg)
{
/*
* If the specified minimum_access_length does not lie between 6 and 20 inclusive, or if
* the state_retention_priority is 65535 then the END-MESSAGE
* instruction fails to make a state creation request of its own
* (however decompression failure does not occur and the state creation
* requests made by the STATE-CREATE instruction are still valid).
*/
int is_ok = ( (6<=minimum_access_length && minimum_access_length<=20) && state_retention_priority!=65535 );
// if not ok and not END_MESSAGE --> decompression failure MUST occurs
if(!is_ok)
{
if(end_msg) return 1;
if(state_retention_priority == 65535)
{
tcomp_udvm_createNackInfo2(udvm, NACK_INVALID_STATE_PRIORITY);
}
else
{
tcomp_udvm_createNackInfo2(udvm, NACK_INVALID_STATE_ID_LENGTH);
}
return 0;
}
/*
* decompression failure occurs if the END-MESSAGE instruction makes a state creation request and four
* instances of the STATE-CREATE instruction have already been encountered.
*/
if(tcomp_result_getTempStatesToCreateSize(udvm->lpResult) >= MAX_TEMP_SATES)
{
tcomp_udvm_createNackInfo2(udvm, NACK_TOO_MANY_STATE_REQUESTS);
return 0;
}
/*
* Is there a state to create?
*/
if(is_ok)
{
// no byte copy ()
tcomp_state_t *lpState = tcomp_state_create(state_length, state_address, state_instruction, minimum_access_length, state_retention_priority);
tcomp_result_addTempStateToCreate(udvm->lpResult, lpState);
}
return 1;
}
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