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71 lines
2.2 KiB
C++
71 lines
2.2 KiB
C++
#include <IO/readFloatText.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_PARSE_INPUT_ASSERTION_FAILED;
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}
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/** Must successfully parse inf, INF and Infinity.
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* All other variants in different cases are also parsed for simplicity.
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*/
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bool parseInfinity(ReadBuffer & buf)
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{
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if (!checkStringCaseInsensitive("inf", buf))
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return false;
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/// Just inf.
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if (buf.eof() || !isWordCharASCII(*buf.position()))
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return true;
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/// If word characters after inf, it should be infinity.
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return checkStringCaseInsensitive("inity", buf);
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}
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/** Must successfully parse nan, NAN and NaN.
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* All other variants in different cases are also parsed for simplicity.
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*/
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bool parseNaN(ReadBuffer & buf)
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{
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return checkStringCaseInsensitive("nan", buf);
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}
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void assertInfinity(ReadBuffer & buf)
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{
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if (!parseInfinity(buf))
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throw Exception("Cannot parse infinity.", ErrorCodes::CANNOT_PARSE_INPUT_ASSERTION_FAILED);
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}
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void assertNaN(ReadBuffer & buf)
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{
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if (!parseNaN(buf))
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throw Exception("Cannot parse NaN.", ErrorCodes::CANNOT_PARSE_INPUT_ASSERTION_FAILED);
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}
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template void readFloatTextPrecise<Float32>(Float32 &, ReadBuffer &);
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template void readFloatTextPrecise<Float64>(Float64 &, ReadBuffer &);
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template bool tryReadFloatTextPrecise<Float32>(Float32 &, ReadBuffer &);
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template bool tryReadFloatTextPrecise<Float64>(Float64 &, ReadBuffer &);
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template void readFloatTextFast<Float32>(Float32 &, ReadBuffer &);
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template void readFloatTextFast<Float64>(Float64 &, ReadBuffer &);
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template bool tryReadFloatTextFast<Float32>(Float32 &, ReadBuffer &);
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template bool tryReadFloatTextFast<Float64>(Float64 &, ReadBuffer &);
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template void readFloatTextSimple<Float32>(Float32 &, ReadBuffer &);
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template void readFloatTextSimple<Float64>(Float64 &, ReadBuffer &);
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template bool tryReadFloatTextSimple<Float32>(Float32 &, ReadBuffer &);
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template bool tryReadFloatTextSimple<Float64>(Float64 &, ReadBuffer &);
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template void readFloatText<Float32>(Float32 &, ReadBuffer &);
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template void readFloatText<Float64>(Float64 &, ReadBuffer &);
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template bool tryReadFloatText<Float32>(Float32 &, ReadBuffer &);
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template bool tryReadFloatText<Float64>(Float64 &, ReadBuffer &);
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}
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