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