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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-FileCopyrightText: Copyright 2008 Sandia Corporation
// SPDX-License-Identifier: LicenseRef-BSD-3-Clause-Sandia-USGov
#include "vtkTextCodec.h"
#include <vtk_utf8.h>
VTK_ABI_NAMESPACE_BEGIN
namespace
{
// iterator to throw away input.
class bucketIterator : public vtkTextCodec::OutputIterator
{
public:
bucketIterator& operator=(const vtkTypeUInt32&) override { return *this; }
};
class stringIterator : public vtkTextCodec::OutputIterator
{
public:
stringIterator(std::string& output)
: Output(output)
{
}
stringIterator& operator=(const vtkTypeUInt32& value) override
{
utf8::append(value, std::back_inserter(this->Output));
return *this;
}
private:
std::string& Output;
};
} // end anonymous namespace
const char* vtkTextCodec::Name()
{
return "";
}
bool vtkTextCodec::CanHandle(const char* NameStr)
{
return (0 == strcmp(NameStr, Name()));
}
bool vtkTextCodec::IsValid(istream& InputStream)
{
bool returnBool = true;
// get the position of the stream so we can restore it when we are done
istream::pos_type StreamPos = InputStream.tellg();
try
{
bucketIterator bucket;
this->ToUnicode(InputStream, bucket);
}
catch (...)
{
returnBool = false;
}
// reset the stream
InputStream.clear();
InputStream.seekg(StreamPos);
return returnBool;
}
void vtkTextCodec::ToUnicode(istream& inputStream, vtkTextCodec::OutputIterator& output)
{
try
{
while (!inputStream.eof())
{
const vtkTypeUInt32 CodePoint = NextUTF32CodePoint(inputStream);
*output++ = CodePoint;
}
}
catch (...)
{
if (!inputStream.eof())
{
throw;
}
}
}
vtkTextCodec::~vtkTextCodec() = default;
vtkTextCodec::vtkTextCodec() = default;
std::string vtkTextCodec::ToString(istream& inputStream)
{
std::string result;
stringIterator iterator(result);
this->ToUnicode(inputStream, iterator);
return result;
}
void vtkTextCodec::PrintSelf(ostream& os, vtkIndent indent)
{
os << indent << "vtkTextCodec (" << this << ") \n";
indent = indent.GetNextIndent();
this->Superclass::PrintSelf(os, indent.GetNextIndent());
}
VTK_ABI_NAMESPACE_END
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