internal static DxfHeaderSection HeaderSectionFromBuffer(DxfCodePairBufferReader buffer)
{
var section = new DxfHeaderSection();
string keyName = null;
Func <short, bool> shortToBool = value => value != 0;
while (buffer.ItemsRemain)
{
var pair = buffer.Peek();
buffer.Advance();
if (DxfCodePair.IsSectionEnd(pair))
{
// done reading settings
break;
}
if (pair.Code == 9)
{
// what setting to get
keyName = pair.StringValue;
}
else
{
section.Header.SetHeaderVariable(keyName, pair);
if (string.Compare(keyName, "$ACADVER", StringComparison.OrdinalIgnoreCase) == 0 && section.Header.Version >= DxfAcadVersion.R2007)
{
// R2007 and up should switch to a UTF8 reader
buffer.SetUtf8Reader();
}
}
}
return(section);
}
internal static DxfHeaderSection HeaderSectionFromBuffer(DxfCodePairBufferReader buffer)
{
var section = new DxfHeaderSection();
string keyName = null;
Func <short, bool> shortToBool = value => value != 0;
while (buffer.ItemsRemain)
{
var pair = buffer.Peek();
buffer.Advance();
if (DxfCodePair.IsSectionEnd(pair))
{
// done reading settings
break;
}
if (pair.Code == 9)
{
// what setting to get
keyName = pair.StringValue;
}
else
{
section.Header.SetHeaderVariable(keyName, pair);
}
}
return(section);
}
internal static DxfSection FromBuffer(DxfCodePairBufferReader buffer, DxfAcadVersion version)
{
Debug.Assert(buffer.ItemsRemain);
var sectionType = buffer.Peek();
buffer.Advance();
if (sectionType.Code != 2)
{
throw new DxfReadException($"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);
}
internal static DxfHeaderSection HeaderSectionFromBuffer(DxfCodePairBufferReader buffer)
{
var section = new DxfHeaderSection();
string keyName = null;
Func <short, bool> shortToBool = value => value != 0;
while (buffer.ItemsRemain)
{
var pair = buffer.Peek();
buffer.Advance();
if (DxfCodePair.IsSectionEnd(pair))
{
// done reading settings
break;
}
if (pair.Code == 9)
{
// what setting to get
keyName = pair.StringValue;
}
else
{
section.Header.SetHeaderVariable(keyName, pair);
if (string.Compare(keyName, "$DWGCODEPAGE", StringComparison.OrdinalIgnoreCase) == 0 && section.Header.Version <= DxfAcadVersion.R2004)
{
// R2004 and before should honor the specified code page
if (DxfEncodingHelper.TryParseEncoding(pair.StringValue, out var codePage))
{
var encoding = Encoding.GetEncoding(codePage);
buffer.SetReaderEncoding(encoding);
}
}
else if (string.Compare(keyName, "$ACADVER", StringComparison.OrdinalIgnoreCase) == 0 && section.Header.Version >= DxfAcadVersion.R2007)
{
// R2007 and up should switch to a UTF8 reader
buffer.SetReaderEncoding(Encoding.UTF8);
}
}
}
return(section);
}