/// <summary>
/// Finds McgStructMarshalData for a struct if it is defined in this module
/// </summary>
/// <param name="structTypeHandle">TypeHandle for the safe struct</param>
/// <param name="structMarshalData">McgStructMarshalData for the struct</param>
/// <returns>True if the struct marshal data is available in this module</returns>
internal bool TryGetStructMarshalData(RuntimeTypeHandle structTypeHandle, out McgStructMarshalData structMarshalData)
{
structMarshalData = default(McgStructMarshalData);
if (m_structMarshalData == null)
{
return(false);
}
for (int i = 0; i < m_structMarshalData.Length; i++)
{
if (structTypeHandle.Equals(m_structMarshalData[i].SafeStructType))
{
if (m_structMarshalData[i].HasInvalidLayout)
{
throw new ArgumentException(SR.Format(SR.Argument_MustHaveLayoutOrBeBlittable, structTypeHandle.GetDisplayName()));
}
structMarshalData = m_structMarshalData[i];
return(true);
}
}
return(false);
}
/// <summary>
/// Try to get offset data according to McgStructMarshalData's FieldOffsetStartIndex/NumOfFields
/// </summary>
/// <param name="structMarshalData">The Struct Marshal Data</param>
/// <param name="fieldName">Name of field</param>
/// <param name="offset">offset in bytes</param>
/// <returns>if the offset value exists, return true; else return false </returns>
internal bool TryGetStructFieldOffset(McgStructMarshalData structMarshalData, string fieldName, out uint offset)
{
// Try to find its field in map
if (m_unsafeStructFieldNameMap != null)
{
int start = structMarshalData.FieldOffsetStartIndex;
int count = structMarshalData.NumOfFields;
for (int i = start; i < start + count; i++)
{
if (fieldName == m_unsafeStructFieldNameMap.GetString(i))
{
offset = m_unsafeStructOffsetData[i].Offset;
return(true);
}
}
}
// Couldn't find its field
offset = 0;
return(false);
}
internal static bool TryGetStructMarshalData(RuntimeTypeHandle structureTypeHandle, out McgStructMarshalData structMarshalData)
{
for (int i = 0; i < s_moduleCount; i++)
{
if (s_modules[i].TryGetStructMarshalData(structureTypeHandle, out structMarshalData))
{
return(true);
}
}
structMarshalData = default(McgStructMarshalData);
return(false);
}
