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69da915160
This change fixes: MCOL-4462 CAST(varchar_expr AS DECIMAL(M,N)) returns a wrong result MCOL-4500 Bit functions processing throws internally trying to cast char into decimal representation MCOL-4532 CAST(AS DECIMAL) returns a garbage for large values Also, this change makes string-to-decimal conversion 5-10 times faster, depending on exact data. Performance implemenent is achieved by the fact that (unlike in the old implementation), the new version does not do any "string" object copying.
57 lines
1.4 KiB
C++
57 lines
1.4 KiB
C++
/* Copyright (C) 2020 MariaDB Corporation.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; version 2 of
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the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#ifndef MARIADB_CONSTSTRING_H
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#define MARIADB_CONSTSTRING_H
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namespace utils
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{
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class ConstString
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{
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protected:
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const char *mStr;
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size_t mLength;
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public:
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ConstString(const char *str, size_t length)
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:mStr(str), mLength(length)
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{ }
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explicit ConstString(const std::string &str)
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:mStr(str.data()), mLength(str.length())
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{ }
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const char *str() const { return mStr; }
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const char *end() const { return mStr + mLength; }
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size_t length() const { return mLength; }
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bool eq(char ch) const
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{
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return mLength == 1 && mStr[0] == ch;
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}
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ConstString & rtrimZero()
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{
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for ( ; mLength && mStr[mLength - 1] == '\0'; mLength--)
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{ }
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return *this;
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}
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};
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} // namespace utils
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#endif // MARIADB_CONSTSTRING_H
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