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40 lines
882 B
C++
40 lines
882 B
C++
#include <IO/ReadBufferFromIStream.h>
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#include <Common/Exception.h>
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int CANNOT_READ_FROM_ISTREAM;
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}
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bool ReadBufferFromIStream::nextImpl()
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{
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istr.read(internal_buffer.begin(), internal_buffer.size());
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size_t gcount = istr.gcount();
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if (!gcount)
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{
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if (istr.eof())
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return false;
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if (istr.fail())
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throw Exception("Cannot read from istream at offset " + std::to_string(count()), ErrorCodes::CANNOT_READ_FROM_ISTREAM);
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throw Exception("Unexpected state of istream at offset " + std::to_string(count()), ErrorCodes::CANNOT_READ_FROM_ISTREAM);
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}
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else
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working_buffer.resize(gcount);
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return true;
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}
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ReadBufferFromIStream::ReadBufferFromIStream(std::istream & istr_, size_t size)
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: BufferWithOwnMemory<ReadBuffer>(size), istr(istr_)
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{
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}
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}
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