e7c3d04309
format all files Revert "format all files" This reverts commit 95d5812e49e7f916b68e786596f5a8eb5bcac414. Revert "format some files" This reverts commit ed3c8762d4d828b2b28e7b18809fc33f4f8ccaf5. format all files fix formatting in dir include fix formatting of debug macro
149 lines
4.2 KiB
C++
149 lines
4.2 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2021 Artem Pavlenko
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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#ifndef MAPNIK_NUMERIC_2_STRING_HPP
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#define MAPNIK_NUMERIC_2_STRING_HPP
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#include <mapnik/global.hpp>
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#include <string>
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#include <sstream>
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#include <memory>
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#include <algorithm>
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static inline std::string numeric2string(const char* buf)
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{
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std::int16_t ndigits = int2net(buf);
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std::int16_t weight = int2net(buf + 2);
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std::int16_t sign = int2net(buf + 4);
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std::int16_t dscale = int2net(buf + 6);
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std::unique_ptr<std::int16_t[]> digits(new std::int16_t[ndigits]);
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for (int n = 0; n < ndigits; ++n)
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{
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digits[n] = int2net(buf + 8 + n * 2);
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}
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std::ostringstream ss;
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if (sign == 0x4000)
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ss << "-";
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int i = std::max(weight, std::int16_t(0));
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int d = 0;
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// Each numeric "digit" is actually a value between 0000 and 9999 stored in a 16 bit field.
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// For example, the number 1234567809990001 is stored as four digits: [1234] [5678] [999] [1].
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// Note that the last two digits show that the leading 0's are lost when the number is split.
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// We must be careful to re-insert these 0's when building the string.
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while (i >= 0)
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{
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if (i <= weight && d < ndigits)
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{
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// All digits after the first must be padded to make the field 4 characters long
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if (d != 0)
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{
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#ifdef _WIN32
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int dig = digits[d];
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if (dig < 10)
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{
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ss << "000"; // 0000 - 0009
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}
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else if (dig < 100)
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{
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ss << "00"; // 0010 - 0099
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}
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else
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{
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ss << "0"; // 0100 - 0999;
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}
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#else
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switch (digits[d])
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{
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case 0 ... 9:
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ss << "000"; // 0000 - 0009
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break;
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case 10 ... 99:
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ss << "00"; // 0010 - 0099
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break;
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case 100 ... 999:
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ss << "0"; // 0100 - 0999
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break;
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}
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#endif
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}
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ss << digits[d++];
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}
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else
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{
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if (d == 0)
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ss << "0";
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else
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ss << "0000";
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}
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i--;
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}
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if (dscale > 0)
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{
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ss << '.';
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// dscale counts the number of decimal digits following the point, not the numeric digits
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while (dscale > 0)
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{
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int value;
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if (i <= weight && d < ndigits)
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value = digits[d++];
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else
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value = 0;
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// Output up to 4 decimal digits for this value
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if (dscale > 0)
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{
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ss << (value / 1000);
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value %= 1000;
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dscale--;
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}
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if (dscale > 0)
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{
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ss << (value / 100);
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value %= 100;
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dscale--;
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}
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if (dscale > 0)
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{
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ss << (value / 10);
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value %= 10;
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dscale--;
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}
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if (dscale > 0)
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{
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ss << value;
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dscale--;
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}
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i--;
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}
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}
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return ss.str();
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}
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#endif
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