internal static DxfBlocksSection BlocksSectionFromBuffer(DxfCodePairBufferReader buffer)
{
var section = new DxfBlocksSection();
section.Clear();
while (buffer.ItemsRemain)
{
var pair = buffer.Peek();
if (DxfCodePair.IsSectionStart(pair))
{
// done reading blocks, onto the next section
break;
}
else if (DxfCodePair.IsSectionEnd(pair))
{
// done reading blocks
buffer.Advance(); // swallow (0, ENDSEC)
break;
}
if (pair.Code != 0)
{
throw new DxfReadException("Expected new block.", pair);
}
buffer.Advance(); // swallow (0, CLASS)
var block = DxfBlock.FromBuffer(buffer);
if (block != null)
{
section.Blocks.Add(block);
}
}
return(section);
}
internal static DxfBlocksSection BlocksSectionFromBuffer(DxfCodePairBufferReader buffer, DxfAcadVersion version)
{
var section = new DxfBlocksSection();
while (buffer.ItemsRemain)
{
var pair = buffer.Peek();
if (DxfCodePair.IsSectionStart(pair))
{
// done reading blocks, onto the next section
break;
}
else if (DxfCodePair.IsSectionEnd(pair))
{
// done reading blocks
buffer.Advance(); // swallow (0, ENDSEC)
break;
}
if (pair.Code != 0)
{
throw new DxfReadException("Expected new block.", pair);
}
buffer.Advance(); // swallow (0, CLASS)
var block = DxfBlock.FromBuffer(buffer, version);
if (block != null)
{
section.Blocks.Add(block);
}
}
return section;
}
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);
}