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#include "slang-text-io.h"
#include "slang-com-helper.h"
namespace Slang
{
// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! StreamWriter !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
SlangResult StreamWriter::init(const String& path, CharEncoding* encoding)
{
RefPtr<FileStream> fileStream = new FileStream;
SLANG_RETURN_ON_FAIL(fileStream->init(path, FileMode::Create));
return init(fileStream, encoding);
}
SlangResult StreamWriter::init(RefPtr<Stream> stream, CharEncoding* encoding)
{
m_stream = stream;
m_encoding = encoding;
if (encoding == CharEncoding::UTF16)
{
SLANG_RETURN_ON_FAIL(m_stream->write(&kUTF16Header, 2));
}
else if (encoding == CharEncoding::UTF16Reversed)
{
SLANG_RETURN_ON_FAIL(m_stream->write(&kUTF16ReversedHeader, 2));
}
return SLANG_OK;
}
SlangResult StreamWriter::writeSlice(const UnownedStringSlice& slice)
{
// TODO(JS):
// We can do better here. On Linux, this is a no-op and can just write directly (assuming slice
// only contains \n)
m_encodingBuffer.clear();
StringBuilder sb;
#ifdef _WIN32
const char newLine[] = "\r\n";
#else
const char newLine[] = "\n";
#endif
const Index length = slice.getLength();
for (Index i = 0; i < length; i++)
{
if (slice[i] == '\r')
sb << newLine;
else if (slice[i] == '\n')
{
if (i > 0 && slice[i - 1] != '\r')
sb << newLine;
}
else
sb << slice[i];
}
// NOTE! This assumes that sb contains *complete* utf8 code points, which it might not, as
// encoder is only able to handle complete code points.
m_encodingBuffer.clear();
m_encoding->encode(sb.getUnownedSlice(), m_encodingBuffer);
return m_stream->write(m_encodingBuffer.getBuffer(), m_encodingBuffer.getCount());
}
// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! StreamReader !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
StreamReader::StreamReader() {}
SlangResult StreamReader::init(const String& path)
{
RefPtr<FileStream> fileStream = new FileStream;
SLANG_RETURN_ON_FAIL(fileStream->init(path, FileMode::Open));
return init(fileStream);
}
SlangResult StreamReader::init(RefPtr<Stream> stream, CharEncoding* encoding)
{
m_stream = stream;
m_encoding = encoding;
SLANG_RETURN_ON_FAIL(readBuffer());
if (encoding == nullptr)
{
size_t offset;
m_encodingType = CharEncoding::determineEncoding(
(const Byte*)m_buffer.getBuffer(),
m_buffer.getCount(),
offset);
m_encoding = CharEncoding::getEncoding(m_encodingType);
m_index = Index(offset);
}
else
{
m_encodingType = encoding->getEncodingType();
m_encoding = encoding;
}
return SLANG_OK;
}
SlangResult StreamReader::readBuffer()
{
m_buffer.setCount(0);
m_index = 0;
if (m_stream->isEnd())
{
return SLANG_OK;
}
m_buffer.setCount(4096);
// TODO(JS): Not clear this is necessary
memset(m_buffer.getBuffer(), 0, m_buffer.getCount() * sizeof(m_buffer[0]));
size_t readBytes;
SLANG_RETURN_ON_FAIL(m_stream->read(m_buffer.getBuffer(), m_buffer.getCount(), readBytes));
m_buffer.setCount(Index(readBytes));
m_index = 0;
return SLANG_OK;
}
Byte StreamReader::readBufferByte()
{
if (m_index < m_buffer.getCount())
{
return m_buffer[m_index++];
}
readBuffer();
if (m_index < m_buffer.getCount())
{
return m_buffer[m_index++];
}
return 0;
}
SlangResult StreamReader::readToEnd(String& outString)
{
StringBuilder sb(16384);
while (!isEnd())
{
auto ch = read();
if (isEnd())
break;
if (ch == '\r')
{
sb.append('\n');
if (peek() == '\n')
read();
}
else
sb.append(ch);
}
outString = sb.produceString();
return SLANG_OK;
}
} // namespace Slang
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