ScopeTree.cs

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namespace System.Reflection.Emit;
 
internal sealed class ScopeTree
{
    internal int[] m_iOffsets;
 
    internal ScopeAction[] m_ScopeActions;
 
    internal int m_iCount;
 
    internal int m_iOpenScopeCount;
 
    internal LocalSymInfo[] m_localSymInfos;
 
    internal ScopeTree()
    {
        m_iOpenScopeCount = 0;
        m_iCount = 0;
    }
 
    internal int GetCurrentActiveScopeIndex()
    {
        if (m_iCount == 0)
        {
            return -1;
        }
        int num = m_iCount - 1;
        int num2 = 0;
        while (num2 > 0 || m_ScopeActions[num] == ScopeAction.Close)
        {
            num2 += (int)m_ScopeActions[num];
            num--;
        }
        return num;
    }
 
    internal void AddUsingNamespaceToCurrentScope(string strNamespace)
    {
        int currentActiveScopeIndex = GetCurrentActiveScopeIndex();
        ref LocalSymInfo reference = ref m_localSymInfos[currentActiveScopeIndex];
        if (reference == null)
        {
            reference = new LocalSymInfo();
        }
        m_localSymInfos[currentActiveScopeIndex].AddUsingNamespace(strNamespace);
    }
 
    internal void AddScopeInfo(ScopeAction sa, int iOffset)
    {
        if (sa == ScopeAction.Close && m_iOpenScopeCount <= 0)
        {
            throw new ArgumentException(SR.Argument_UnmatchingSymScope);
        }
        EnsureCapacity();
        m_ScopeActions[m_iCount] = sa;
        m_iOffsets[m_iCount] = iOffset;
        m_localSymInfos[m_iCount] = null;
        checked
        {
            m_iCount++;
        }
        m_iOpenScopeCount += 0 - sa;
    }
 
    internal void EnsureCapacity()
    {
        if (m_iCount == 0)
        {
            m_iOffsets = new int[16];
            m_ScopeActions = new ScopeAction[16];
            m_localSymInfos = new LocalSymInfo[16];
        }
        else if (m_iCount == m_iOffsets.Length)
        {
            int num = checked(m_iCount * 2);
            int[] array = new int[num];
            Array.Copy(m_iOffsets, array, m_iCount);
            m_iOffsets = array;
            ScopeAction[] array2 = new ScopeAction[num];
            Array.Copy(m_ScopeActions, array2, m_iCount);
            m_ScopeActions = array2;
            LocalSymInfo[] array3 = new LocalSymInfo[num];
            Array.Copy(m_localSymInfos, array3, m_iCount);
            m_localSymInfos = array3;
        }
    }
}