kopia lustrzana https://github.com/weetmuts/wmbusmeters
149 wiersze
3.2 KiB
C++
149 wiersze
3.2 KiB
C++
/*
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Copyright (C) 2019 Fredrik Öhrström
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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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, see <http://www.gnu.org/licenses/>.
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*/
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#include"units.h"
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#include"util.h"
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using namespace std;
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#define LIST_OF_CONVERSIONS \
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X(KWH, GJ, {vto=vfrom*0.0036;}) \
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X(GJ, KWH,{vto=vfrom/0.0036;}) \
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X(M3, L, {vto=vfrom*1000.0;}) \
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X(L, M3, {vto=vfrom/1000.0;})
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bool canConvert(Unit ufrom, Unit uto)
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{
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if (ufrom == uto) return true;
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#define X(from,to,code) if (Unit::from == ufrom && Unit::to == uto) return true;
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LIST_OF_CONVERSIONS
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#undef X
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return false;
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}
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double convert(double vfrom, Unit ufrom, Unit uto)
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{
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double vto = -4711.0;
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if (ufrom == uto) { { vto = vfrom; } return vto; }
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#define X(from,to,code) if (Unit::from == ufrom && Unit::to == uto) { code return vto; }
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LIST_OF_CONVERSIONS
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#undef X
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error("Cannot convert between units!\n");
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return 0;
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}
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bool isQuantity(Unit u, Quantity q)
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{
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#define X(cname,lcname,hrname,quantity,explanation) if (u == Unit::cname) return Quantity::quantity == q;
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LIST_OF_UNITS
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#undef X
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return false;
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}
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void assertQuantity(Unit u, Quantity q)
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{
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if (!isQuantity(u, q))
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{
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error("Internal error! Unit is not of this quantity.\n");
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}
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}
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Unit defaultUnitForQuantity(Quantity q)
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{
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#define X(quantity,default_unit) if (q == Quantity::quantity) return Unit::default_unit;
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LIST_OF_QUANTITIES
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#undef X
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return Unit::Unknown;
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}
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Unit toUnit(string s)
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{
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#define X(cname,lcname,hrname,quantity,explanation) if (s == #cname) return Unit::cname;
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LIST_OF_UNITS
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#undef X
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return Unit::Unknown;
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}
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string unitToStringHR(Unit u)
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{
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#define X(cname,lcname,hrname,quantity,explanation) if (u == Unit::cname) return #hrname;
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LIST_OF_UNITS
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#undef X
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return "?";
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}
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string unitToStringLowerCase(Unit u)
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{
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#define X(cname,lcname,hrname,quantity,explanation) if (u == Unit::cname) return #lcname;
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LIST_OF_UNITS
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#undef X
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return "?";
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}
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string unitToStringUpperCase(Unit u)
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{
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#define X(cname,lcname,hrname,quantity,explanation) if (u == Unit::cname) return #cname;
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LIST_OF_UNITS
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#undef X
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return "?";
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}
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string strWithUnitHR(double v, Unit u)
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{
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string r = format3fdot3f(v);
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r += " "+unitToStringHR(u);
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return r;
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}
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string strWithUnitLowerCase(double v, Unit u)
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{
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string r = format3fdot3f(v);
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r += " "+unitToStringLowerCase(u);
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return r;
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}
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Unit replaceWithConversionUnit(Unit u, vector<Unit> cs)
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{
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for (Unit c : cs)
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{
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if (canConvert(u, c)) return c;
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}
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return u;
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}
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string valueToString(double v, Unit u)
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{
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string s = to_string(v);
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while (s.back() == '0') s.pop_back();
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if (s.back() == '.') {
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s.pop_back();
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if (s.length() == 0) return "0";
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return s;
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}
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if (s.length() == 0) return "0";
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return s;
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}
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