kopia lustrzana https://github.com/weetmuts/wmbusmeters
270 wiersze
6.2 KiB
C++
270 wiersze
6.2 KiB
C++
/*
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Copyright (C) 2021-2022 Fredrik Öhrström (gpl-3.0-or-later)
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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"translatebits.h"
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#include"util.h"
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#include<assert.h>
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using namespace Translate;
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using namespace std;
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TriggerBits AlwaysTrigger(~(uint64_t)0);
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MaskBits AutoMask(0);
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void handleBitToString(Rule& rule, string &out_s, uint64_t bits)
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{
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string s;
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if (rule.trigger != AlwaysTrigger && (bits & rule.trigger.intValue()) == 0 )
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{
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// The trigger bits are needed and there are no trigger bits. Ignore this rule.
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return;
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}
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uint64_t mask = rule.mask.intValue();
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if (rule.mask == AutoMask)
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{
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mask = 0;
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for (Map& m : rule.map)
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{
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// Collect all listed bits as the mask.
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mask |= m.from;
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}
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}
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bits = bits & mask;
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for (Map& m : rule.map)
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{
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if ((~mask & m.from) != 0)
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{
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// Check that the match rule does not extend outside of the mask!
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// If mask is 0xff then a match for 0x100 will trigger this bad warning!
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string tmp = tostrprintf("BAD_RULE_%s(from=0x%x mask=0x%x)", rule.name.c_str(), m.from, mask);
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s += tmp+" ";
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}
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uint64_t from = m.from & mask; // Better safe than sorry.
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if (m.test == TestBit::Set)
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{
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if ((bits & from) != 0 )
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{
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s += m.to+" ";
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bits = bits & ~m.from; // Remove the handled bit.
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}
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}
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if (m.test == TestBit::NotSet)
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{
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if ((bits & from) == 0)
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{
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s += m.to+" ";
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}
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else
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{
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bits = bits & ~m.from; // Remove the handled bit.
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}
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}
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}
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if (bits != 0)
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{
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// Oups, there are set bits that we have not handled....
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string tmp;
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strprintf(&tmp, "%s_%X", rule.name.c_str(), bits);
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s += tmp+" ";
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}
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if (s == "")
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{
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s = rule.default_message.stringValue()+" ";
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}
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out_s += s;
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}
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void handleIndexToString(Rule& rule, string &out_s, uint64_t bits)
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{
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string s;
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if (rule.trigger != AlwaysTrigger && (bits & rule.trigger.intValue()) == 0 )
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{
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// The trigger bits are needed and there are no trigger bits. Ignore this rule.
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return;
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}
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uint64_t mask = rule.mask.intValue();
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if (rule.mask == AutoMask)
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{
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mask = 0;
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for (Map& m : rule.map)
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{
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// Collect all listed bits as the mask.
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mask |= m.from;
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}
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}
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bits = bits & mask;
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bool found = false;
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for (Map& m : rule.map)
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{
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assert(m.test == TestBit::Set);
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if ((~mask & m.from) != 0)
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{
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string tmp;
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strprintf(&tmp, "BAD_RULE_%s(from=0x%x mask=0x%x)", rule.name.c_str(), m.from, rule.mask);
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s += tmp+" ";
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}
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uint64_t from = m.from & mask; // Better safe than sorry.
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if (bits == from)
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{
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s += m.to+" ";
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found = true;
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}
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}
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if (!found)
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{
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// Oups, this index has not been found.
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string tmp;
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strprintf(&tmp, "%s_%X", rule.name.c_str(), bits);
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s += tmp+" ";
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}
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out_s += s;
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}
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void handleDecimalsToString(Rule& rule, string &out_s, uint64_t bits)
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{
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string s;
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if (rule.trigger != AlwaysTrigger && (bits & rule.trigger.intValue()) == 0 )
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{
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// The trigger bits are needed and there are no trigger bits. Ignore this rule.
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return;
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}
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uint64_t mask = rule.mask.intValue();
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if (rule.mask == AutoMask)
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{
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mask = 0;
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for (Map& m : rule.map)
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{
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// Collect all listed bits as the mask.
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mask |= m.from;
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}
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}
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// Switch to signed number here.
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int number = bits % mask;
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if (number == 0)
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{
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s += rule.default_message.stringValue()+" ";
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}
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for (Map& m : rule.map)
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{
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assert(m.test == TestBit::Set);
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if ((m.from - (m.from % mask)) != 0)
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{
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string tmp;
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strprintf(&tmp, "BAD_RULE_%s(from=%d modulomask=%d)", rule.name.c_str(), m.from, rule.mask);
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s += tmp+" ";
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}
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int num = m.from % mask; // Better safe than sorry.
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if ((number - num) >= 0)
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{
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s += m.to+" ";
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number -= num;
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}
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}
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if (number > 0)
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{
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// Oups, this number has not been fully understood.
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string tmp;
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strprintf(&tmp, "%s_%d", rule.name.c_str(), number);
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s += tmp+" ";
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}
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out_s += s;
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}
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void handleRule(Rule& rule, string &s, uint64_t bits)
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{
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switch (rule.type)
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{
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case Type::BitToString:
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handleBitToString(rule, s, bits);
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break;
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case Type::IndexToString:
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handleIndexToString(rule, s, bits);
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break;
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case Type::DecimalsToString:
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handleDecimalsToString(rule, s, bits);
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break;
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default:
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assert(0);
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}
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}
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string Lookup::translate(uint64_t bits)
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{
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string total = "";
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for (Rule& r : rules)
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{
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string s;
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handleRule(r, s, bits);
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total = joinStatusEmptyStrings(total, s);
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}
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while (total.size() > 0 && total.back() == ' ') total.pop_back();
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return sortStatusString(total);
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}
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string Lookup::str()
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{
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string x = " Lookup {\n";
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for (Rule& r : rules)
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{
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x += " Rulex {\n";
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x += " name = "+r.name+"\n";
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x += " }\n";
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}
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x += "}\n";
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return x;
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}
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Lookup NoLookup = {};
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Map m = { 123, "howdy" };
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vector<Map> vm = { { 123, "howdy" } };
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Rule r = { "name", Translate::Type::IndexToString,
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AlwaysTrigger, MaskBits(0xe000), "", { } };
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