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https://github.com/ClickHouse/ClickHouse.git
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c7863e1ac6
* Attempt to enable identifier naming check * Attempt to enable identifier naming check, continue * Progress on identifier names * Adopt identifier names check * Fixed error * Merge with master * Fixed build * Fixed build * Fixed build * Fixed build * Fixed build * Fixed error * Fixed error * Fixed error
175 lines
3.7 KiB
C++
175 lines
3.7 KiB
C++
#include <mysqlxx/Value.h>
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#include <mysqlxx/ResultBase.h>
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#include <mysqlxx/Query.h>
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#include <mysqlxx/Exception.h>
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namespace mysqlxx
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{
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UInt64 Value::readUIntText(const char * buf, size_t length) const
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{
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UInt64 x = 0;
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const char * end = buf + length;
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while (buf != end)
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{
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switch (*buf)
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{
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case '+':
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break;
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case '0':
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case '1':
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case '2':
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case '3':
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case '4':
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case '5':
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case '6':
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case '7':
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case '8':
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case '9':
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x *= 10;
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x += *buf - '0';
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break;
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default:
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throwException("Cannot parse unsigned integer");
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}
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++buf;
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}
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return x;
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}
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Int64 Value::readIntText(const char * buf, size_t length) const
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{
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bool negative = false;
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UInt64 x = 0;
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const char * end = buf + length;
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while (buf != end)
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{
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switch (*buf)
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{
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case '+':
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break;
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case '-':
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negative = true;
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break;
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case '0':
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case '1':
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case '2':
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case '3':
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case '4':
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case '5':
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case '6':
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case '7':
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case '8':
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case '9':
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x *= 10;
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x += *buf - '0';
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break;
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default:
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throwException("Cannot parse signed integer");
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}
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++buf;
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}
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return negative ? -x : x;
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}
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double Value::readFloatText(const char * buf, size_t length) const
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{
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bool negative = false;
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double x = 0;
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bool after_point = false;
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double power_of_ten = 1;
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const char * end = buf + length;
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while (buf != end)
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{
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switch (*buf)
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{
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case '+':
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break;
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case '-':
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negative = true;
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break;
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case '.':
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after_point = true;
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break;
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case '0':
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case '1':
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case '2':
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case '3':
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case '4':
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case '5':
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case '6':
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case '7':
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case '8':
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case '9':
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if (after_point)
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{
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power_of_ten /= 10;
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x += (*buf - '0') * power_of_ten;
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}
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else
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{
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x *= 10;
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x += *buf - '0';
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}
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break;
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case 'e':
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case 'E':
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{
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++buf;
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Int32 exponent = readIntText(buf, end - buf);
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x *= preciseExp10(exponent);
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if (negative)
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x = -x;
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return x;
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}
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case 'i':
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case 'I':
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x = std::numeric_limits<double>::infinity();
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if (negative)
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x = -x;
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return x;
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case 'n':
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case 'N':
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x = std::numeric_limits<double>::quiet_NaN();
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return x;
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default:
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throwException("Cannot parse floating point number");
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}
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++buf;
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}
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if (negative)
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x = -x;
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return x;
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}
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void Value::throwException(const char * text) const
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{
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static constexpr size_t preview_length = 1000;
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std::stringstream info;
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info << text;
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if (!isNull())
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{
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info << ": ";
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info.write(m_data, m_length);
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}
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if (res && res->getQuery())
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info << ", query: " << res->getQuery()->str().substr(0, preview_length);
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throw CannotParseValue(info.str());
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}
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}
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