internal static DxfSection FromBuffer(DxfCodePairBufferReader buffer, DxfAcadVersion version)
{
Debug.Assert(buffer.ItemsRemain);
var sectionType = buffer.Peek();
buffer.Advance();
if (sectionType.Code != 2)
{
throw new DxfReadException($"Expected code 2, got {sectionType.Code}", sectionType);
}
DxfSection section;
switch (sectionType.StringValue)
{
case BlocksSectionText:
section = DxfBlocksSection.BlocksSectionFromBuffer(buffer, version);
break;
case ClassesSectionText:
section = DxfClassesSection.ClassesSectionFromBuffer(buffer, version);
break;
case EntitiesSectionText:
section = DxfEntitiesSection.EntitiesSectionFromBuffer(buffer);
break;
case HeaderSectionText:
section = DxfHeaderSection.HeaderSectionFromBuffer(buffer);
break;
case ObjectsSectionText:
section = DxfObjectsSection.ObjectsSectionFromBuffer(buffer);
break;
case TablesSectionText:
section = DxfTablesSection.TablesSectionFromBuffer(buffer);
break;
case ThumbnailImageSectionText:
section = DxfThumbnailImageSection.ThumbnailImageSectionFromBuffer(buffer);
break;
default:
SwallowSection(buffer);
section = null;
break;
}
return(section);
}
internal static DxfTablesSection TablesSectionFromBuffer(DxfCodePairBufferReader buffer)
{
var section = new DxfTablesSection();
while (buffer.ItemsRemain)
{
var pair = buffer.Peek();
buffer.Advance();
if (DxfCodePair.IsSectionEnd(pair))
{
break;
}
if (!IsTableStart(pair))
{
throw new DxfReadException("Expected start of table.", pair);
}
var table = DxfTable.FromBuffer(buffer);
if (table != null)
{
switch (table.TableType)
{
case DxfTableType.AppId:
section.AppIdTable = (DxfAppIdTable)table;
break;
case DxfTableType.BlockRecord:
section.BlockRecordTable = (DxfBlockRecordTable)table;
break;
case DxfTableType.DimStyle:
section.DimStyleTable = (DxfDimStyleTable)table;
break;
case DxfTableType.Layer:
section.LayerTable = (DxfLayerTable)table;
break;
case DxfTableType.LType:
section.LTypeTable = (DxfLTypeTable)table;
break;
case DxfTableType.Style:
section.StyleTable = (DxfStyleTable)table;
break;
case DxfTableType.Ucs:
section.UcsTable = (DxfUcsTable)table;
break;
case DxfTableType.View:
section.ViewTable = (DxfViewTable)table;
break;
case DxfTableType.ViewPort:
section.ViewPortTable = (DxfViewPortTable)table;
break;
default:
throw new DxfReadException($"Unexpected table type {table.TableType}", pair);
}
}
}
return section;
}
internal static DxfTablesSection TablesSectionFromBuffer(DxfCodePairBufferReader buffer)
{
var section = new DxfTablesSection();
section.Clear();
while (buffer.ItemsRemain)
{
var pair = buffer.Peek();
buffer.Advance();
if (DxfCodePair.IsSectionEnd(pair))
{
break;
}
if (!IsTableStart(pair))
{
throw new DxfReadException("Expected start of table.", pair);
}
var table = DxfTable.FromBuffer(buffer);
if (table != null)
{
switch (table.TableType)
{
case DxfTableType.AppId:
section.AppIdTable = (DxfAppIdTable)table;
break;
case DxfTableType.BlockRecord:
section.BlockRecordTable = (DxfBlockRecordTable)table;
break;
case DxfTableType.DimStyle:
section.DimStyleTable = (DxfDimStyleTable)table;
break;
case DxfTableType.Layer:
section.LayerTable = (DxfLayerTable)table;
break;
case DxfTableType.LType:
section.LTypeTable = (DxfLTypeTable)table;
break;
case DxfTableType.Style:
section.StyleTable = (DxfStyleTable)table;
break;
case DxfTableType.Ucs:
section.UcsTable = (DxfUcsTable)table;
break;
case DxfTableType.View:
section.ViewTable = (DxfViewTable)table;
break;
case DxfTableType.ViewPort:
section.ViewPortTable = (DxfViewPortTable)table;
break;
default:
throw new DxfReadException($"Unexpected table type {table.TableType}", pair);
}
}
}
return(section);
}