24 size_t GetBytesAvailable(std::istream* input_stream) {  in GetBytesAvailable()  argument
25   const std::streamoff pos = input_stream->tellg();  in GetBytesAvailable()
30   input_stream->seekg(0, std::ios::end);  in GetBytesAvailable()
31   if (!input_stream->good()) {  in GetBytesAvailable()
35   const std::streamoff end = input_stream->tellg();  in GetBytesAvailable()
39   input_stream->seekg(pos);  in GetBytesAvailable()
48 int ReadByteAsInt(std::istream* input_stream) {  in ReadByteAsInt()  argument
50   input_stream->read(reinterpret_cast<char*>(&byte), 1);  in ReadByteAsInt()
51   if (!input_stream->good()) {  in ReadByteAsInt()
59 size_t Read2ByteLength(std::istream* input_stream, bool* error) {  in Read2ByteLength()  argument
60   const int length_high = ReadByteAsInt(input_stream);  in Read2ByteLength()
61   const int length_low = ReadByteAsInt(input_stream);  in Read2ByteLength()
88                            std::istream* input_stream) {  in Parse()  argument
91   if (ReadByteAsInt(input_stream) != 0xff ||  in Parse()
92       ReadByteAsInt(input_stream) != kSoi) {  in Parse()
99   while ((chr = ReadByteAsInt(input_stream)) != -1) {  in Parse()
105     while ((chr = ReadByteAsInt(input_stream)) == 0xff) {  in Parse()
120         const size_t bytes_available = GetBytesAvailable(input_stream);  in Parse()
122         input_stream->read(&section.data[0], bytes_available);  in Parse()
123         if (input_stream->good()) {  in Parse()
132     const size_t length = Read2ByteLength(input_stream, &error);  in Parse()
139     const size_t bytes_left = GetBytesAvailable(input_stream);  in Parse()
157       input_stream->read(&section.data[0], section.data.size());  in Parse()
158       if (input_stream->good() &&  in Parse()
170       input_stream->ignore(length - kSectionLengthByteSize);  in Parse()