101 lines
3.5 KiB
C++
101 lines
3.5 KiB
C++
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#include "circuit.h"
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#include <iostream>
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#include <fstream>
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#include <string>
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#include <regex>
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#include <set>
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std::string trim(const std::string& s) {
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auto wsfront = std::find_if_not(s.begin(), s.end(), [](int c){ return std::isspace(c); });
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auto wsback = std::find_if_not(s.rbegin(), s.rend(), [](int c){ return std::isspace(c); }).base();
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return (wsback <= wsfront ? std::string() : std::string(wsfront, wsback));
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}
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void Circuit::parse_from_file(const char *filename) {
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std::ifstream file(filename);
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if(!file.is_open()) {
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printf("Error while reading %s\n", filename);
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exit(1);
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}
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// buf 10MB
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file.rdbuf()->pubsetbuf(0, 10 *1024 * 1024);
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std::string line;
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while(std::getline(file, line)) {
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if(line[0] == '#') continue;
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if(line == "\r" || line == "") continue;
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std::cmatch m;
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if(std::regex_match(line.c_str(), m, std::regex("INPUT\\s*\\(\\s*(.*)\\s*\\)\\s*"))) {
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Gate *input = new Gate();
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input->name = m.str(1);
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input->type = Gate::INPUT;
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input->value = Gate::VAL_X;
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name2gate.insert(std::make_pair(input->name, input));
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std::cout << "input -> $" << input->name << "$" << std::endl;
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PIs.push_back(input);
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} else if(std::regex_match(line.c_str(), m, std::regex("OUTPUT\\s*\\(\\s*(.*)\\s*\\)\\s*"))) {
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Gate *output = new Gate();
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output->name = m.str(1);
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output->type = Gate::OUTPUT;
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output->value = Gate::VAL_X;
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name2gate.insert(std::make_pair(output->name, output));
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POs.push_back(output);
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} else if(std::regex_match(line.c_str(), m, std::regex("\\s*(\\S+)\\s*=\\s*(\\w+)\\s*\\(\\s*(.*)\\s*\\)\\s*"))) {
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std::string output_name = m.str(1);
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std::string gate_name = m.str(2);
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std::string list = m.str(3);
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Gate *gate = new Gate();
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gate->name = output_name;
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gate->value = Gate::VAL_X;
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name2gate.insert(std::make_pair(gate->name, gate));
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// split by ","
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std::regex pattern(R"(\s*,\s*)");
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std::sregex_token_iterator it(list.begin(), list.end(), pattern, -1);
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std::sregex_token_iterator end;
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while (it != end) {
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std::string in = trim(*it++);
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if(!name2gate.count(in)) {
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printf("Error while reading file: $%s$ is not defined before used.\n", in.c_str());
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exit(1);
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}
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Gate* in_gate = name2gate[in];
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gate->inputs.push_back(in_gate);
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in_gate->outputs.push_back(gate);
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}
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if(gate_name == "AND") { gate->type = Gate::AND; }
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else if(gate_name == "NAND") { gate->type = Gate::NAND; }
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else if(gate_name == "OR") { gate->type = Gate::OR; }
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else if(gate_name == "NOR") { gate->type = Gate::NOR; }
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else if(gate_name == "XOR") { gate->type = Gate::XOR; }
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else if(gate_name == "XNOR") { gate->type = Gate::XNOR; }
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else if(gate_name == "NOT") { gate->type = Gate::NOT; }
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else if(gate_name == "BUF") { gate->type = Gate::BUF; }
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else {
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printf("Error while reading file: %s is not a valid gate.\n", gate_name.c_str());
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exit(1);
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}
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} else {
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printf("Error while reading file: \"%s\" is a wrong line.\n", line.c_str());
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exit(1);
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}
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}
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}
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