101 lines
2.5 KiB
C++
101 lines
2.5 KiB
C++
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/*
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Copyright (c) 1997-1999 Microsoft Corporation
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*/
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#include "sdppch.h"
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#include "sdpltran.h"
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SDP_LINE_TRANSITION::SDP_LINE_TRANSITION(
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IN LINE_TRANSITION_INFO *LineTransitionInfo,
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IN DWORD NumStates
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)
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: m_IsValid(FALSE),
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m_LineTransitionInfo(LineTransitionInfo),
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m_NumStates(NumStates)
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{
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ASSERT(NULL != LineTransitionInfo);
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ASSERT(0 < NumStates);
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if ( (NULL == LineTransitionInfo) || (0 >= NumStates) )
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{
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return;
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}
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// verify each transition info structure
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//
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for ( UINT i=0; i < NumStates; i++ )
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{
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// check if the line state value is consistent with the corresponding entry
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ASSERT(LineTransitionInfo[i].m_LineState == i);
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if ( LineTransitionInfo[i].m_LineState != i )
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{
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return;
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}
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// check that the separator character string is initialized (NULL)
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ASSERT(NULL == LineTransitionInfo[i].m_SeparatorChars);
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if ( NULL != LineTransitionInfo[i].m_SeparatorChars )
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{
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return;
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}
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}
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m_IsValid = TRUE;
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// prepare separator character arrays for each of the line transition states
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for ( i=0; i < NumStates; i++ )
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{
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CHAR *SeparatorChars;
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// allocate memory for the separator characters
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try
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{
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SeparatorChars = new CHAR[LineTransitionInfo[i].m_NumTransitions];
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}
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catch(...)
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{
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SeparatorChars = NULL;
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}
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if( NULL == SeparatorChars)
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{
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LineTransitionInfo[i].m_SeparatorChars = NULL;
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continue;
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}
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// copy each separator character into the character array
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for ( UINT j=0; j < LineTransitionInfo[i].m_NumTransitions; j++ )
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{
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SeparatorChars[j] = LineTransitionInfo[i].m_Transitions[j].m_SeparatorChar;
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}
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LineTransitionInfo[i].m_SeparatorChars = SeparatorChars;
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}
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return;
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}
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SDP_LINE_TRANSITION::~SDP_LINE_TRANSITION(
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)
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{
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// if the m_IsValid flag is set, then the separator character arrays must have
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// been filled and need to be freed
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if ( IsValid() )
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{
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for ( UINT i=0; i < m_NumStates; i++ )
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{
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// this check is necessary for situations in which new raised exception when
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// allocating the character arrays in the constructor
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if ( NULL != m_LineTransitionInfo[i].m_SeparatorChars )
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{
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delete m_LineTransitionInfo[i].m_SeparatorChars;
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}
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}
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}
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}
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