mirror of
https://github.com/mariadb-corporation/mariadb-columnstore-engine.git
synced 2025-04-28 06:45:06 +03:00
98 lines
2.3 KiB
C++
98 lines
2.3 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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#pragma once
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#include <string>
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#include <string.h>
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#include <execinfo.h>
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#include "exceptclasses.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; // it can be NULL now.
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size_t mLength;
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public:
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ConstString(const char* str, size_t length) : mStr(str), mLength(length)
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{
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idbassert(mStr || mLength == 0); // nullptr mStr should have zero length.
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}
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explicit ConstString(const std::string& str) : mStr(str.data()), mLength(str.length())
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{
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}
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const char* str() const
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{
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return mStr;
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}
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const char* end() const
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{
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return mStr + mLength;
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}
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size_t length() const
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{
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return mLength;
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}
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std::string toString() const
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{
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idbassert(mStr);
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return std::string(mStr, mLength);
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}
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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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bool eq(const ConstString& rhs) const
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{
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return mLength == rhs.mLength && !memcmp(mStr, rhs.mStr, mLength);
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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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}
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return *this;
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}
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ConstString& rtrimSpaces()
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{
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for (; mLength && mStr[mLength - 1] == ' '; --mLength)
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{
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}
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return *this;
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}
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void bin2hex(char* o)
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{
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static const char hexdig[] = {'0', '1', '2', '3', '4', '5', '6', '7',
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'8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
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const char* e = end();
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for (const char* s = mStr; s < e; s++)
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{
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*o++ = hexdig[*s >> 4];
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*o++ = hexdig[*s & 0xf];
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}
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}
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bool isNull() const
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{
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return mStr == nullptr;
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}
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};
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} // namespace utils
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